Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/m68k/atari/Makefile b/arch/m68k/atari/Makefile
new file mode 100644
index 0000000..8cb6236
--- /dev/null
+++ b/arch/m68k/atari/Makefile
@@ -0,0 +1,10 @@
+#
+# Makefile for Linux arch/m68k/atari source directory
+#
+
+obj-y := config.o time.o debug.o ataints.o stdma.o \
+ atasound.o stram.o atari_ksyms.o
+
+ifeq ($(CONFIG_PCI),y)
+obj-$(CONFIG_HADES) += hades-pci.o
+endif
diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
new file mode 100644
index 0000000..076f479
--- /dev/null
+++ b/arch/m68k/atari/ataints.c
@@ -0,0 +1,648 @@
+/*
+ * arch/m68k/atari/ataints.c -- Atari Linux interrupt handling code
+ *
+ * 5/2/94 Roman Hodek:
+ * Added support for TT interrupts; setup for TT SCU (may someone has
+ * twiddled there and we won't get the right interrupts :-()
+ *
+ * Major change: The device-independent code in m68k/ints.c didn't know
+ * about non-autovec ints yet. It hardcoded the number of possible ints to
+ * 7 (IRQ1...IRQ7). But the Atari has lots of non-autovec ints! I made the
+ * number of possible ints a constant defined in interrupt.h, which is
+ * 47 for the Atari. So we can call request_irq() for all Atari interrupts
+ * just the normal way. Additionally, all vectors >= 48 are initialized to
+ * call trap() instead of inthandler(). This must be changed here, too.
+ *
+ * 1995-07-16 Lars Brinkhoff <f93labr@dd.chalmers.se>:
+ * Corrected a bug in atari_add_isr() which rejected all SCC
+ * interrupt sources if there were no TT MFP!
+ *
+ * 12/13/95: New interface functions atari_level_triggered_int() and
+ * atari_register_vme_int() as support for level triggered VME interrupts.
+ *
+ * 02/12/96: (Roman)
+ * Total rewrite of Atari interrupt handling, for new scheme see comments
+ * below.
+ *
+ * 1996-09-03 lars brinkhoff <f93labr@dd.chalmers.se>:
+ * Added new function atari_unregister_vme_int(), and
+ * modified atari_register_vme_int() as well as IS_VALID_INTNO()
+ * to work with it.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+
+#include <asm/system.h>
+#include <asm/traps.h>
+
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_stdma.h>
+#include <asm/irq.h>
+#include <asm/entry.h>
+
+
+/*
+ * Atari interrupt handling scheme:
+ * --------------------------------
+ *
+ * All interrupt source have an internal number (defined in
+ * <asm/atariints.h>): Autovector interrupts are 1..7, then follow ST-MFP,
+ * TT-MFP, SCC, and finally VME interrupts. Vector numbers for the latter can
+ * be allocated by atari_register_vme_int().
+ *
+ * Each interrupt can be of three types:
+ *
+ * - SLOW: The handler runs with all interrupts enabled, except the one it
+ * was called by (to avoid reentering). This should be the usual method.
+ * But it is currently possible only for MFP ints, since only the MFP
+ * offers an easy way to mask interrupts.
+ *
+ * - FAST: The handler runs with all interrupts disabled. This should be used
+ * only for really fast handlers, that just do actions immediately
+ * necessary, and let the rest do a bottom half or task queue.
+ *
+ * - PRIORITIZED: The handler can be interrupted by higher-level ints
+ * (greater IPL, no MFP priorities!). This is the method of choice for ints
+ * which should be slow, but are not from a MFP.
+ *
+ * The feature of more than one handler for one int source is still there, but
+ * only applicable if all handers are of the same type. To not slow down
+ * processing of ints with only one handler by the chaining feature, the list
+ * calling function atari_call_irq_list() is only plugged in at the time the
+ * second handler is registered.
+ *
+ * Implementation notes: For fast-as-possible int handling, there are separate
+ * entry points for each type (slow/fast/prio). The assembler handler calls
+ * the irq directly in the usual case, no C wrapper is involved. In case of
+ * multiple handlers, atari_call_irq_list() is registered as handler and calls
+ * in turn the real irq's. To ease access from assembler level to the irq
+ * function pointer and accompanying data, these two are stored in a separate
+ * array, irq_handler[]. The rest of data (type, name) are put into a second
+ * array, irq_param, that is accessed from C only. For each slow interrupt (32
+ * in all) there are separate handler functions, which makes it possible to
+ * hard-code the MFP register address and value, are necessary to mask the
+ * int. If there'd be only one generic function, lots of calculations would be
+ * needed to determine MFP register and int mask from the vector number :-(
+ *
+ * Furthermore, slow ints may not lower the IPL below its previous value
+ * (before the int happened). This is needed so that an int of class PRIO, on
+ * that this int may be stacked, cannot be reentered. This feature is
+ * implemented as follows: If the stack frame format is 1 (throwaway), the int
+ * is not stacked, and the IPL is anded with 0xfbff, resulting in a new level
+ * 2, which still blocks the HSYNC, but no interrupts of interest. If the
+ * frame format is 0, the int is nested, and the old IPL value can be found in
+ * the sr copy in the frame.
+ */
+
+
+#define NUM_INT_SOURCES (8 + NUM_ATARI_SOURCES)
+
+typedef void (*asm_irq_handler)(void);
+
+struct irqhandler {
+ irqreturn_t (*handler)(int, void *, struct pt_regs *);
+ void *dev_id;
+};
+
+struct irqparam {
+ unsigned long flags;
+ const char *devname;
+};
+
+/*
+ * Array with irq's and their parameter data. This array is accessed from low
+ * level assembler code, so an element size of 8 allows usage of index scaling
+ * addressing mode.
+ */
+static struct irqhandler irq_handler[NUM_INT_SOURCES];
+
+/*
+ * This array hold the rest of parameters of int handlers: type
+ * (slow,fast,prio) and the name of the handler. These values are only
+ * accessed from C
+ */
+static struct irqparam irq_param[NUM_INT_SOURCES];
+
+/*
+ * Bitmap for free interrupt vector numbers
+ * (new vectors starting from 0x70 can be allocated by
+ * atari_register_vme_int())
+ */
+static int free_vme_vec_bitmap;
+
+/* check for valid int number (complex, sigh...) */
+#define IS_VALID_INTNO(n) \
+ ((n) > 0 && \
+ /* autovec and ST-MFP ok anyway */ \
+ (((n) < TTMFP_SOURCE_BASE) || \
+ /* TT-MFP ok if present */ \
+ ((n) >= TTMFP_SOURCE_BASE && (n) < SCC_SOURCE_BASE && \
+ ATARIHW_PRESENT(TT_MFP)) || \
+ /* SCC ok if present and number even */ \
+ ((n) >= SCC_SOURCE_BASE && (n) < VME_SOURCE_BASE && \
+ !((n) & 1) && ATARIHW_PRESENT(SCC)) || \
+ /* greater numbers ok if they are registered VME vectors */ \
+ ((n) >= VME_SOURCE_BASE && (n) < VME_SOURCE_BASE + VME_MAX_SOURCES && \
+ free_vme_vec_bitmap & (1 << ((n) - VME_SOURCE_BASE)))))
+
+
+/*
+ * Here start the assembler entry points for interrupts
+ */
+
+#define IRQ_NAME(nr) atari_slow_irq_##nr##_handler(void)
+
+#define BUILD_SLOW_IRQ(n) \
+asmlinkage void IRQ_NAME(n); \
+/* Dummy function to allow asm with operands. */ \
+void atari_slow_irq_##n##_dummy (void) { \
+__asm__ (__ALIGN_STR "\n" \
+"atari_slow_irq_" #n "_handler:\t" \
+" addl %6,%5\n" /* preempt_count() += HARDIRQ_OFFSET */ \
+ SAVE_ALL_INT "\n" \
+ GET_CURRENT(%%d0) "\n" \
+" andb #~(1<<(%c3&7)),%a4:w\n" /* mask this interrupt */ \
+ /* get old IPL from stack frame */ \
+" bfextu %%sp@(%c2){#5,#3},%%d0\n" \
+" movew %%sr,%%d1\n" \
+" bfins %%d0,%%d1{#21,#3}\n" \
+" movew %%d1,%%sr\n" /* set IPL = previous value */ \
+" addql #1,%a0\n" \
+" lea %a1,%%a0\n" \
+" pea %%sp@\n" /* push addr of frame */ \
+" movel %%a0@(4),%%sp@-\n" /* push handler data */ \
+" pea (%c3+8)\n" /* push int number */ \
+" movel %%a0@,%%a0\n" \
+" jbsr %%a0@\n" /* call the handler */ \
+" addql #8,%%sp\n" \
+" addql #4,%%sp\n" \
+" orw #0x0600,%%sr\n" \
+" andw #0xfeff,%%sr\n" /* set IPL = 6 again */ \
+" orb #(1<<(%c3&7)),%a4:w\n" /* now unmask the int again */ \
+" jbra ret_from_interrupt\n" \
+ : : "i" (&kstat_cpu(0).irqs[n+8]), "i" (&irq_handler[n+8]), \
+ "n" (PT_OFF_SR), "n" (n), \
+ "i" (n & 8 ? (n & 16 ? &tt_mfp.int_mk_a : &mfp.int_mk_a) \
+ : (n & 16 ? &tt_mfp.int_mk_b : &mfp.int_mk_b)), \
+ "m" (preempt_count()), "di" (HARDIRQ_OFFSET) \
+); \
+ for (;;); /* fake noreturn */ \
+}
+
+BUILD_SLOW_IRQ(0);
+BUILD_SLOW_IRQ(1);
+BUILD_SLOW_IRQ(2);
+BUILD_SLOW_IRQ(3);
+BUILD_SLOW_IRQ(4);
+BUILD_SLOW_IRQ(5);
+BUILD_SLOW_IRQ(6);
+BUILD_SLOW_IRQ(7);
+BUILD_SLOW_IRQ(8);
+BUILD_SLOW_IRQ(9);
+BUILD_SLOW_IRQ(10);
+BUILD_SLOW_IRQ(11);
+BUILD_SLOW_IRQ(12);
+BUILD_SLOW_IRQ(13);
+BUILD_SLOW_IRQ(14);
+BUILD_SLOW_IRQ(15);
+BUILD_SLOW_IRQ(16);
+BUILD_SLOW_IRQ(17);
+BUILD_SLOW_IRQ(18);
+BUILD_SLOW_IRQ(19);
+BUILD_SLOW_IRQ(20);
+BUILD_SLOW_IRQ(21);
+BUILD_SLOW_IRQ(22);
+BUILD_SLOW_IRQ(23);
+BUILD_SLOW_IRQ(24);
+BUILD_SLOW_IRQ(25);
+BUILD_SLOW_IRQ(26);
+BUILD_SLOW_IRQ(27);
+BUILD_SLOW_IRQ(28);
+BUILD_SLOW_IRQ(29);
+BUILD_SLOW_IRQ(30);
+BUILD_SLOW_IRQ(31);
+
+asm_irq_handler slow_handlers[32] = {
+ [0] = atari_slow_irq_0_handler,
+ [1] = atari_slow_irq_1_handler,
+ [2] = atari_slow_irq_2_handler,
+ [3] = atari_slow_irq_3_handler,
+ [4] = atari_slow_irq_4_handler,
+ [5] = atari_slow_irq_5_handler,
+ [6] = atari_slow_irq_6_handler,
+ [7] = atari_slow_irq_7_handler,
+ [8] = atari_slow_irq_8_handler,
+ [9] = atari_slow_irq_9_handler,
+ [10] = atari_slow_irq_10_handler,
+ [11] = atari_slow_irq_11_handler,
+ [12] = atari_slow_irq_12_handler,
+ [13] = atari_slow_irq_13_handler,
+ [14] = atari_slow_irq_14_handler,
+ [15] = atari_slow_irq_15_handler,
+ [16] = atari_slow_irq_16_handler,
+ [17] = atari_slow_irq_17_handler,
+ [18] = atari_slow_irq_18_handler,
+ [19] = atari_slow_irq_19_handler,
+ [20] = atari_slow_irq_20_handler,
+ [21] = atari_slow_irq_21_handler,
+ [22] = atari_slow_irq_22_handler,
+ [23] = atari_slow_irq_23_handler,
+ [24] = atari_slow_irq_24_handler,
+ [25] = atari_slow_irq_25_handler,
+ [26] = atari_slow_irq_26_handler,
+ [27] = atari_slow_irq_27_handler,
+ [28] = atari_slow_irq_28_handler,
+ [29] = atari_slow_irq_29_handler,
+ [30] = atari_slow_irq_30_handler,
+ [31] = atari_slow_irq_31_handler
+};
+
+asmlinkage void atari_fast_irq_handler( void );
+asmlinkage void atari_prio_irq_handler( void );
+
+/* Dummy function to allow asm with operands. */
+void atari_fast_prio_irq_dummy (void) {
+__asm__ (__ALIGN_STR "\n"
+"atari_fast_irq_handler:\n\t"
+ "orw #0x700,%%sr\n" /* disable all interrupts */
+"atari_prio_irq_handler:\n\t"
+ "addl %3,%2\n\t" /* preempt_count() += HARDIRQ_OFFSET */
+ SAVE_ALL_INT "\n\t"
+ GET_CURRENT(%%d0) "\n\t"
+ /* get vector number from stack frame and convert to source */
+ "bfextu %%sp@(%c1){#4,#10},%%d0\n\t"
+ "subw #(0x40-8),%%d0\n\t"
+ "jpl 1f\n\t"
+ "addw #(0x40-8-0x18),%%d0\n"
+ "1:\tlea %a0,%%a0\n\t"
+ "addql #1,%%a0@(%%d0:l:4)\n\t"
+ "lea irq_handler,%%a0\n\t"
+ "lea %%a0@(%%d0:l:8),%%a0\n\t"
+ "pea %%sp@\n\t" /* push frame address */
+ "movel %%a0@(4),%%sp@-\n\t" /* push handler data */
+ "movel %%d0,%%sp@-\n\t" /* push int number */
+ "movel %%a0@,%%a0\n\t"
+ "jsr %%a0@\n\t" /* and call the handler */
+ "addql #8,%%sp\n\t"
+ "addql #4,%%sp\n\t"
+ "jbra ret_from_interrupt"
+ : : "i" (&kstat_cpu(0).irqs), "n" (PT_OFF_FORMATVEC),
+ "m" (preempt_count()), "di" (HARDIRQ_OFFSET)
+);
+ for (;;);
+}
+
+/* GK:
+ * HBL IRQ handler for Falcon. Nobody needs it :-)
+ * ++andreas: raise ipl to disable further HBLANK interrupts.
+ */
+asmlinkage void falcon_hblhandler(void);
+asm(".text\n"
+__ALIGN_STR "\n\t"
+"falcon_hblhandler:\n\t"
+ "orw #0x200,%sp@\n\t" /* set saved ipl to 2 */
+ "rte");
+
+/* Defined in entry.S; only increments 'num_spurious' */
+asmlinkage void bad_interrupt(void);
+
+extern void atari_microwire_cmd( int cmd );
+
+extern int atari_SCC_reset_done;
+
+/*
+ * void atari_init_IRQ (void)
+ *
+ * Parameters: None
+ *
+ * Returns: Nothing
+ *
+ * This function should be called during kernel startup to initialize
+ * the atari IRQ handling routines.
+ */
+
+void __init atari_init_IRQ(void)
+{
+ int i;
+
+ /* initialize the vector table */
+ for (i = 0; i < NUM_INT_SOURCES; ++i) {
+ vectors[IRQ_SOURCE_TO_VECTOR(i)] = bad_interrupt;
+ }
+
+ /* Initialize the MFP(s) */
+
+#ifdef ATARI_USE_SOFTWARE_EOI
+ mfp.vec_adr = 0x48; /* Software EOI-Mode */
+#else
+ mfp.vec_adr = 0x40; /* Automatic EOI-Mode */
+#endif
+ mfp.int_en_a = 0x00; /* turn off MFP-Ints */
+ mfp.int_en_b = 0x00;
+ mfp.int_mk_a = 0xff; /* no Masking */
+ mfp.int_mk_b = 0xff;
+
+ if (ATARIHW_PRESENT(TT_MFP)) {
+#ifdef ATARI_USE_SOFTWARE_EOI
+ tt_mfp.vec_adr = 0x58; /* Software EOI-Mode */
+#else
+ tt_mfp.vec_adr = 0x50; /* Automatic EOI-Mode */
+#endif
+ tt_mfp.int_en_a = 0x00; /* turn off MFP-Ints */
+ tt_mfp.int_en_b = 0x00;
+ tt_mfp.int_mk_a = 0xff; /* no Masking */
+ tt_mfp.int_mk_b = 0xff;
+ }
+
+ if (ATARIHW_PRESENT(SCC) && !atari_SCC_reset_done) {
+ scc.cha_a_ctrl = 9;
+ MFPDELAY();
+ scc.cha_a_ctrl = (char) 0xc0; /* hardware reset */
+ }
+
+ if (ATARIHW_PRESENT(SCU)) {
+ /* init the SCU if present */
+ tt_scu.sys_mask = 0x10; /* enable VBL (for the cursor) and
+ * disable HSYNC interrupts (who
+ * needs them?) MFP and SCC are
+ * enabled in VME mask
+ */
+ tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */
+ }
+ else {
+ /* If no SCU and no Hades, the HSYNC interrupt needs to be
+ * disabled this way. (Else _inthandler in kernel/sys_call.S
+ * gets overruns)
+ */
+
+ if (!MACH_IS_HADES)
+ vectors[VEC_INT2] = falcon_hblhandler;
+ }
+
+ if (ATARIHW_PRESENT(PCM_8BIT) && ATARIHW_PRESENT(MICROWIRE)) {
+ /* Initialize the LM1992 Sound Controller to enable
+ the PSG sound. This is misplaced here, it should
+ be in an atasound_init(), that doesn't exist yet. */
+ atari_microwire_cmd(MW_LM1992_PSG_HIGH);
+ }
+
+ stdma_init();
+
+ /* Initialize the PSG: all sounds off, both ports output */
+ sound_ym.rd_data_reg_sel = 7;
+ sound_ym.wd_data = 0xff;
+}
+
+
+static irqreturn_t atari_call_irq_list( int irq, void *dev_id, struct pt_regs *fp )
+{
+ irq_node_t *node;
+
+ for (node = (irq_node_t *)dev_id; node; node = node->next)
+ node->handler(irq, node->dev_id, fp);
+ return IRQ_HANDLED;
+}
+
+
+/*
+ * atari_request_irq : add an interrupt service routine for a particular
+ * machine specific interrupt source.
+ * If the addition was successful, it returns 0.
+ */
+
+int atari_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ unsigned long flags, const char *devname, void *dev_id)
+{
+ int vector;
+ unsigned long oflags = flags;
+
+ /*
+ * The following is a hack to make some PCI card drivers work,
+ * which set the SA_SHIRQ flag.
+ */
+
+ flags &= ~SA_SHIRQ;
+
+ if (flags == SA_INTERRUPT) {
+ printk ("%s: SA_INTERRUPT changed to IRQ_TYPE_SLOW for %s\n",
+ __FUNCTION__, devname);
+ flags = IRQ_TYPE_SLOW;
+ }
+ if (flags < IRQ_TYPE_SLOW || flags > IRQ_TYPE_PRIO) {
+ printk ("%s: Bad irq type 0x%lx <0x%lx> requested from %s\n",
+ __FUNCTION__, flags, oflags, devname);
+ return -EINVAL;
+ }
+ if (!IS_VALID_INTNO(irq)) {
+ printk ("%s: Unknown irq %d requested from %s\n",
+ __FUNCTION__, irq, devname);
+ return -ENXIO;
+ }
+ vector = IRQ_SOURCE_TO_VECTOR(irq);
+
+ /*
+ * Check type/source combination: slow ints are (currently)
+ * only possible for MFP-interrupts.
+ */
+ if (flags == IRQ_TYPE_SLOW &&
+ (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE)) {
+ printk ("%s: Slow irq requested for non-MFP source %d from %s\n",
+ __FUNCTION__, irq, devname);
+ return -EINVAL;
+ }
+
+ if (vectors[vector] == bad_interrupt) {
+ /* int has no handler yet */
+ irq_handler[irq].handler = handler;
+ irq_handler[irq].dev_id = dev_id;
+ irq_param[irq].flags = flags;
+ irq_param[irq].devname = devname;
+ vectors[vector] =
+ (flags == IRQ_TYPE_SLOW) ? slow_handlers[irq-STMFP_SOURCE_BASE] :
+ (flags == IRQ_TYPE_FAST) ? atari_fast_irq_handler :
+ atari_prio_irq_handler;
+ /* If MFP int, also enable and umask it */
+ atari_turnon_irq(irq);
+ atari_enable_irq(irq);
+
+ return 0;
+ }
+ else if (irq_param[irq].flags == flags) {
+ /* old handler is of same type -> handlers can be chained */
+ irq_node_t *node;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ if (irq_handler[irq].handler != atari_call_irq_list) {
+ /* Only one handler yet, make a node for this first one */
+ if (!(node = new_irq_node()))
+ return -ENOMEM;
+ node->handler = irq_handler[irq].handler;
+ node->dev_id = irq_handler[irq].dev_id;
+ node->devname = irq_param[irq].devname;
+ node->next = NULL;
+
+ irq_handler[irq].handler = atari_call_irq_list;
+ irq_handler[irq].dev_id = node;
+ irq_param[irq].devname = "chained";
+ }
+
+ if (!(node = new_irq_node()))
+ return -ENOMEM;
+ node->handler = handler;
+ node->dev_id = dev_id;
+ node->devname = devname;
+ /* new handlers are put in front of the queue */
+ node->next = irq_handler[irq].dev_id;
+ irq_handler[irq].dev_id = node;
+
+ local_irq_restore(flags);
+ return 0;
+ } else {
+ printk ("%s: Irq %d allocated by other type int (call from %s)\n",
+ __FUNCTION__, irq, devname);
+ return -EBUSY;
+ }
+}
+
+void atari_free_irq(unsigned int irq, void *dev_id)
+{
+ unsigned long flags;
+ int vector;
+ irq_node_t **list, *node;
+
+ if (!IS_VALID_INTNO(irq)) {
+ printk("%s: Unknown irq %d\n", __FUNCTION__, irq);
+ return;
+ }
+
+ vector = IRQ_SOURCE_TO_VECTOR(irq);
+ if (vectors[vector] == bad_interrupt)
+ goto not_found;
+
+ local_irq_save(flags);
+
+ if (irq_handler[irq].handler != atari_call_irq_list) {
+ /* It's the only handler for the interrupt */
+ if (irq_handler[irq].dev_id != dev_id) {
+ local_irq_restore(flags);
+ goto not_found;
+ }
+ irq_handler[irq].handler = NULL;
+ irq_handler[irq].dev_id = NULL;
+ irq_param[irq].devname = NULL;
+ vectors[vector] = bad_interrupt;
+ /* If MFP int, also disable it */
+ atari_disable_irq(irq);
+ atari_turnoff_irq(irq);
+
+ local_irq_restore(flags);
+ return;
+ }
+
+ /* The interrupt is chained, find the irq on the list */
+ for(list = (irq_node_t **)&irq_handler[irq].dev_id; *list; list = &(*list)->next) {
+ if ((*list)->dev_id == dev_id) break;
+ }
+ if (!*list) {
+ local_irq_restore(flags);
+ goto not_found;
+ }
+
+ (*list)->handler = NULL; /* Mark it as free for reallocation */
+ *list = (*list)->next;
+
+ /* If there's now only one handler, unchain the interrupt, i.e. plug in
+ * the handler directly again and omit atari_call_irq_list */
+ node = (irq_node_t *)irq_handler[irq].dev_id;
+ if (node && !node->next) {
+ irq_handler[irq].handler = node->handler;
+ irq_handler[irq].dev_id = node->dev_id;
+ irq_param[irq].devname = node->devname;
+ node->handler = NULL; /* Mark it as free for reallocation */
+ }
+
+ local_irq_restore(flags);
+ return;
+
+not_found:
+ printk("%s: tried to remove invalid irq\n", __FUNCTION__);
+ return;
+}
+
+
+/*
+ * atari_register_vme_int() returns the number of a free interrupt vector for
+ * hardware with a programmable int vector (probably a VME board).
+ */
+
+unsigned long atari_register_vme_int(void)
+{
+ int i;
+
+ for(i = 0; i < 32; i++)
+ if((free_vme_vec_bitmap & (1 << i)) == 0)
+ break;
+
+ if(i == 16)
+ return 0;
+
+ free_vme_vec_bitmap |= 1 << i;
+ return (VME_SOURCE_BASE + i);
+}
+
+
+void atari_unregister_vme_int(unsigned long irq)
+{
+ if(irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
+ irq -= VME_SOURCE_BASE;
+ free_vme_vec_bitmap &= ~(1 << irq);
+ }
+}
+
+
+int show_atari_interrupts(struct seq_file *p, void *v)
+{
+ int i;
+
+ for (i = 0; i < NUM_INT_SOURCES; ++i) {
+ if (vectors[IRQ_SOURCE_TO_VECTOR(i)] == bad_interrupt)
+ continue;
+ if (i < STMFP_SOURCE_BASE)
+ seq_printf(p, "auto %2d: %10u ",
+ i, kstat_cpu(0).irqs[i]);
+ else
+ seq_printf(p, "vec $%02x: %10u ",
+ IRQ_SOURCE_TO_VECTOR(i),
+ kstat_cpu(0).irqs[i]);
+
+ if (irq_handler[i].handler != atari_call_irq_list) {
+ seq_printf(p, "%s\n", irq_param[i].devname);
+ }
+ else {
+ irq_node_t *n;
+ for( n = (irq_node_t *)irq_handler[i].dev_id; n; n = n->next ) {
+ seq_printf(p, "%s\n", n->devname);
+ if (n->next)
+ seq_puts(p, " " );
+ }
+ }
+ }
+ if (num_spurious)
+ seq_printf(p, "spurio.: %10u\n", num_spurious);
+
+ return 0;
+}
+
+
diff --git a/arch/m68k/atari/atari_ksyms.c b/arch/m68k/atari/atari_ksyms.c
new file mode 100644
index 0000000..a047571
--- /dev/null
+++ b/arch/m68k/atari/atari_ksyms.c
@@ -0,0 +1,35 @@
+#include <linux/module.h>
+
+#include <asm/ptrace.h>
+#include <asm/traps.h>
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atarikb.h>
+#include <asm/atari_joystick.h>
+#include <asm/atari_stdma.h>
+#include <asm/atari_stram.h>
+
+extern void atari_microwire_cmd( int cmd );
+extern int atari_MFP_init_done;
+extern int atari_SCC_init_done;
+extern int atari_SCC_reset_done;
+
+EXPORT_SYMBOL(atari_mch_cookie);
+EXPORT_SYMBOL(atari_mch_type);
+EXPORT_SYMBOL(atari_hw_present);
+EXPORT_SYMBOL(atari_switches);
+EXPORT_SYMBOL(atari_dont_touch_floppy_select);
+EXPORT_SYMBOL(atari_register_vme_int);
+EXPORT_SYMBOL(atari_unregister_vme_int);
+EXPORT_SYMBOL(stdma_lock);
+EXPORT_SYMBOL(stdma_release);
+EXPORT_SYMBOL(stdma_others_waiting);
+EXPORT_SYMBOL(stdma_islocked);
+EXPORT_SYMBOL(atari_stram_alloc);
+EXPORT_SYMBOL(atari_stram_free);
+
+EXPORT_SYMBOL(atari_MFP_init_done);
+EXPORT_SYMBOL(atari_SCC_init_done);
+EXPORT_SYMBOL(atari_SCC_reset_done);
+
+EXPORT_SYMBOL(atari_microwire_cmd);
diff --git a/arch/m68k/atari/atasound.c b/arch/m68k/atari/atasound.c
new file mode 100644
index 0000000..ee04250
--- /dev/null
+++ b/arch/m68k/atari/atasound.c
@@ -0,0 +1,109 @@
+/*
+ * linux/arch/m68k/atari/atasound.c
+ *
+ * ++Geert: Moved almost all stuff to linux/drivers/sound/
+ *
+ * The author of atari_nosound, atari_mksound and atari_microwire_cmd is
+ * unknown. (++roman: That's me... :-)
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ * 1998-05-31 ++andreas: atari_mksound rewritten to always use the envelope,
+ * no timer, atari_nosound removed.
+ *
+ */
+
+
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/major.h>
+#include <linux/fcntl.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+
+#include <asm/atarihw.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/pgtable.h>
+#include <asm/atariints.h>
+
+
+/*
+ * stuff from the old atasound.c
+ */
+
+void atari_microwire_cmd (int cmd)
+{
+ tt_microwire.mask = 0x7ff;
+ tt_microwire.data = MW_LM1992_ADDR | cmd;
+
+ /* Busy wait for data being completely sent :-( */
+ while( tt_microwire.mask != 0x7ff)
+ ;
+}
+
+
+/* PSG base frequency */
+#define PSG_FREQ 125000
+/* PSG envelope base frequency times 10 */
+#define PSG_ENV_FREQ_10 78125
+
+void atari_mksound (unsigned int hz, unsigned int ticks)
+{
+ /* Generates sound of some frequency for some number of clock
+ ticks. */
+ unsigned long flags;
+ unsigned char tmp;
+ int period;
+
+ local_irq_save(flags);
+
+
+ /* Disable generator A in mixer control. */
+ sound_ym.rd_data_reg_sel = 7;
+ tmp = sound_ym.rd_data_reg_sel;
+ tmp |= 011;
+ sound_ym.wd_data = tmp;
+
+ if (hz) {
+ /* Convert from frequency value to PSG period value (base
+ frequency 125 kHz). */
+
+ period = PSG_FREQ / hz;
+
+ if (period > 0xfff) period = 0xfff;
+
+ /* Set generator A frequency to hz. */
+ sound_ym.rd_data_reg_sel = 0;
+ sound_ym.wd_data = period & 0xff;
+ sound_ym.rd_data_reg_sel = 1;
+ sound_ym.wd_data = (period >> 8) & 0xf;
+ if (ticks) {
+ /* Set length of envelope (max 8 sec). */
+ int length = (ticks * PSG_ENV_FREQ_10) / HZ / 10;
+
+ if (length > 0xffff) length = 0xffff;
+ sound_ym.rd_data_reg_sel = 11;
+ sound_ym.wd_data = length & 0xff;
+ sound_ym.rd_data_reg_sel = 12;
+ sound_ym.wd_data = length >> 8;
+ /* Envelope form: max -> min single. */
+ sound_ym.rd_data_reg_sel = 13;
+ sound_ym.wd_data = 0;
+ /* Use envelope for generator A. */
+ sound_ym.rd_data_reg_sel = 8;
+ sound_ym.wd_data = 0x10;
+ } else {
+ /* Set generator A level to maximum, no envelope. */
+ sound_ym.rd_data_reg_sel = 8;
+ sound_ym.wd_data = 15;
+ }
+ /* Turn on generator A in mixer control. */
+ sound_ym.rd_data_reg_sel = 7;
+ tmp &= ~1;
+ sound_ym.wd_data = tmp;
+ }
+ local_irq_restore(flags);
+}
diff --git a/arch/m68k/atari/atasound.h b/arch/m68k/atari/atasound.h
new file mode 100644
index 0000000..1362762
--- /dev/null
+++ b/arch/m68k/atari/atasound.h
@@ -0,0 +1,33 @@
+/*
+ * Minor numbers for the sound driver.
+ *
+ * Unfortunately Creative called the codec chip of SB as a DSP. For this
+ * reason the /dev/dsp is reserved for digitized audio use. There is a
+ * device for true DSP processors but it will be called something else.
+ * In v3.0 it's /dev/sndproc but this could be a temporary solution.
+ */
+
+#define SND_NDEVS 256 /* Number of supported devices */
+#define SND_DEV_CTL 0 /* Control port /dev/mixer */
+#define SND_DEV_SEQ 1 /* Sequencer output /dev/sequencer (FM
+ synthesizer and MIDI output) */
+#define SND_DEV_MIDIN 2 /* Raw midi access */
+#define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */
+#define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */
+#define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */
+#define SND_DEV_STATUS 6 /* /dev/sndstat */
+/* #7 not in use now. Was in 2.4. Free for use after v3.0. */
+#define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */
+#define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */
+#define SND_DEV_PSS SND_DEV_SNDPROC
+
+#define DSP_DEFAULT_SPEED 8000
+
+#define ON 1
+#define OFF 0
+
+#define MAX_AUDIO_DEV 5
+#define MAX_MIXER_DEV 2
+#define MAX_SYNTH_DEV 3
+#define MAX_MIDI_DEV 6
+#define MAX_TIMER_DEV 3
diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c
new file mode 100644
index 0000000..9261d2d
--- /dev/null
+++ b/arch/m68k/atari/config.c
@@ -0,0 +1,726 @@
+/*
+ * linux/arch/m68k/atari/config.c
+ *
+ * Copyright (C) 1994 Bjoern Brauel
+ *
+ * 5/2/94 Roman Hodek:
+ * Added setting of time_adj to get a better clock.
+ *
+ * 5/14/94 Roman Hodek:
+ * gettod() for TT
+ *
+ * 5/15/94 Roman Hodek:
+ * hard_reset_now() for Atari (and others?)
+ *
+ * 94/12/30 Andreas Schwab:
+ * atari_sched_init fixed to get precise clock.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * Miscellaneous atari stuff
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/vt_kern.h>
+
+#include <asm/bootinfo.h>
+#include <asm/setup.h>
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_stram.h>
+#include <asm/system.h>
+#include <asm/machdep.h>
+#include <asm/hwtest.h>
+#include <asm/io.h>
+
+u_long atari_mch_cookie;
+u_long atari_mch_type;
+struct atari_hw_present atari_hw_present;
+u_long atari_switches;
+int atari_dont_touch_floppy_select;
+int atari_rtc_year_offset;
+
+/* local function prototypes */
+static void atari_reset( void );
+#ifdef CONFIG_ATARI_FLOPPY
+extern void atari_floppy_setup(char *, int *);
+#endif
+static void atari_get_model(char *model);
+static int atari_get_hardware_list(char *buffer);
+
+/* atari specific irq functions */
+extern void atari_init_IRQ (void);
+extern int atari_request_irq (unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ unsigned long flags, const char *devname, void *dev_id);
+extern void atari_free_irq (unsigned int irq, void *dev_id);
+extern void atari_enable_irq (unsigned int);
+extern void atari_disable_irq (unsigned int);
+extern int show_atari_interrupts (struct seq_file *, void *);
+extern void atari_mksound( unsigned int count, unsigned int ticks );
+#ifdef CONFIG_HEARTBEAT
+static void atari_heartbeat( int on );
+#endif
+
+/* atari specific timer functions (in time.c) */
+extern void atari_sched_init(irqreturn_t (*)(int, void *, struct pt_regs *));
+extern unsigned long atari_gettimeoffset (void);
+extern int atari_mste_hwclk (int, struct rtc_time *);
+extern int atari_tt_hwclk (int, struct rtc_time *);
+extern int atari_mste_set_clock_mmss (unsigned long);
+extern int atari_tt_set_clock_mmss (unsigned long);
+
+/* atari specific debug functions (in debug.c) */
+extern void atari_debug_init(void);
+
+
+/* I've moved hwreg_present() and hwreg_present_bywrite() out into
+ * mm/hwtest.c, to avoid having multiple copies of the same routine
+ * in the kernel [I wanted them in hp300 and they were already used
+ * in the nubus code. NB: I don't have an Atari so this might (just
+ * conceivably) break something.
+ * I've preserved the #if 0 version of hwreg_present_bywrite() here
+ * for posterity.
+ * -- Peter Maydell <pmaydell@chiark.greenend.org.uk>, 05/1998
+ */
+
+#if 0
+static int __init
+hwreg_present_bywrite(volatile void *regp, unsigned char val)
+{
+ int ret;
+ long save_sp, save_vbr;
+ static long tmp_vectors[3] = { [2] = (long)&&after_test };
+
+ __asm__ __volatile__
+ ( "movec %/vbr,%2\n\t" /* save vbr value */
+ "movec %4,%/vbr\n\t" /* set up temporary vectors */
+ "movel %/sp,%1\n\t" /* save sp */
+ "moveq #0,%0\n\t" /* assume not present */
+ "moveb %5,%3@\n\t" /* write the hardware reg */
+ "cmpb %3@,%5\n\t" /* compare it */
+ "seq %0" /* comes here only if reg */
+ /* is present */
+ : "=d&" (ret), "=r&" (save_sp), "=r&" (save_vbr)
+ : "a" (regp), "r" (tmp_vectors), "d" (val)
+ );
+ after_test:
+ __asm__ __volatile__
+ ( "movel %0,%/sp\n\t" /* restore sp */
+ "movec %1,%/vbr" /* restore vbr */
+ : : "r" (save_sp), "r" (save_vbr) : "sp"
+ );
+
+ return( ret );
+}
+#endif
+
+
+/* ++roman: This is a more elaborate test for an SCC chip, since the plain
+ * Medusa board generates DTACK at the SCC's standard addresses, but a SCC
+ * board in the Medusa is possible. Also, the addresses where the ST_ESCC
+ * resides generate DTACK without the chip, too.
+ * The method is to write values into the interrupt vector register, that
+ * should be readable without trouble (from channel A!).
+ */
+
+static int __init scc_test( volatile char *ctla )
+{
+ if (!hwreg_present( ctla ))
+ return( 0 );
+ MFPDELAY();
+
+ *ctla = 2; MFPDELAY();
+ *ctla = 0x40; MFPDELAY();
+
+ *ctla = 2; MFPDELAY();
+ if (*ctla != 0x40) return( 0 );
+ MFPDELAY();
+
+ *ctla = 2; MFPDELAY();
+ *ctla = 0x60; MFPDELAY();
+
+ *ctla = 2; MFPDELAY();
+ if (*ctla != 0x60) return( 0 );
+
+ return( 1 );
+}
+
+
+ /*
+ * Parse an Atari-specific record in the bootinfo
+ */
+
+int __init atari_parse_bootinfo(const struct bi_record *record)
+{
+ int unknown = 0;
+ const u_long *data = record->data;
+
+ switch (record->tag) {
+ case BI_ATARI_MCH_COOKIE:
+ atari_mch_cookie = *data;
+ break;
+ case BI_ATARI_MCH_TYPE:
+ atari_mch_type = *data;
+ break;
+ default:
+ unknown = 1;
+ }
+ return(unknown);
+}
+
+
+/* Parse the Atari-specific switches= option. */
+void __init atari_switches_setup( const char *str, unsigned len )
+{
+ char switches[len+1];
+ char *p;
+ int ovsc_shift;
+ char *args = switches;
+
+ /* copy string to local array, strsep works destructively... */
+ strlcpy( switches, str, sizeof(switches) );
+ atari_switches = 0;
+
+ /* parse the options */
+ while ((p = strsep(&args, ",")) != NULL) {
+ if (!*p) continue;
+ ovsc_shift = 0;
+ if (strncmp( p, "ov_", 3 ) == 0) {
+ p += 3;
+ ovsc_shift = ATARI_SWITCH_OVSC_SHIFT;
+ }
+
+ if (strcmp( p, "ikbd" ) == 0) {
+ /* RTS line of IKBD ACIA */
+ atari_switches |= ATARI_SWITCH_IKBD << ovsc_shift;
+ }
+ else if (strcmp( p, "midi" ) == 0) {
+ /* RTS line of MIDI ACIA */
+ atari_switches |= ATARI_SWITCH_MIDI << ovsc_shift;
+ }
+ else if (strcmp( p, "snd6" ) == 0) {
+ atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift;
+ }
+ else if (strcmp( p, "snd7" ) == 0) {
+ atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift;
+ }
+ }
+}
+
+
+ /*
+ * Setup the Atari configuration info
+ */
+
+void __init config_atari(void)
+{
+ unsigned short tos_version;
+
+ memset(&atari_hw_present, 0, sizeof(atari_hw_present));
+
+ atari_debug_init();
+
+ ioport_resource.end = 0xFFFFFFFF; /* Change size of I/O space from 64KB
+ to 4GB. */
+
+ mach_sched_init = atari_sched_init;
+ mach_init_IRQ = atari_init_IRQ;
+ mach_request_irq = atari_request_irq;
+ mach_free_irq = atari_free_irq;
+ enable_irq = atari_enable_irq;
+ disable_irq = atari_disable_irq;
+ mach_get_model = atari_get_model;
+ mach_get_hardware_list = atari_get_hardware_list;
+ mach_get_irq_list = show_atari_interrupts;
+ mach_gettimeoffset = atari_gettimeoffset;
+ mach_reset = atari_reset;
+#ifdef CONFIG_ATARI_FLOPPY
+ mach_floppy_setup = atari_floppy_setup;
+#endif
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+ mach_max_dma_address = 0xffffff;
+#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
+ mach_beep = atari_mksound;
+#endif
+#ifdef CONFIG_HEARTBEAT
+ mach_heartbeat = atari_heartbeat;
+#endif
+
+ /* Set switches as requested by the user */
+ if (atari_switches & ATARI_SWITCH_IKBD)
+ acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID;
+ if (atari_switches & ATARI_SWITCH_MIDI)
+ acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
+ if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) {
+ sound_ym.rd_data_reg_sel = 14;
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel |
+ ((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) |
+ ((atari_switches&ATARI_SWITCH_SND7) ? 0x80 : 0);
+ }
+
+ /* ++bjoern:
+ * Determine hardware present
+ */
+
+ printk( "Atari hardware found: " );
+ if (MACH_IS_MEDUSA || MACH_IS_HADES) {
+ /* There's no Atari video hardware on the Medusa, but all the
+ * addresses below generate a DTACK so no bus error occurs! */
+ }
+ else if (hwreg_present( f030_xreg )) {
+ ATARIHW_SET(VIDEL_SHIFTER);
+ printk( "VIDEL " );
+ /* This is a temporary hack: If there is Falcon video
+ * hardware, we assume that the ST-DMA serves SCSI instead of
+ * ACSI. In the future, there should be a better method for
+ * this...
+ */
+ ATARIHW_SET(ST_SCSI);
+ printk( "STDMA-SCSI " );
+ }
+ else if (hwreg_present( tt_palette )) {
+ ATARIHW_SET(TT_SHIFTER);
+ printk( "TT_SHIFTER " );
+ }
+ else if (hwreg_present( &shifter.bas_hi )) {
+ if (hwreg_present( &shifter.bas_lo ) &&
+ (shifter.bas_lo = 0x0aau, shifter.bas_lo == 0x0aau)) {
+ ATARIHW_SET(EXTD_SHIFTER);
+ printk( "EXTD_SHIFTER " );
+ }
+ else {
+ ATARIHW_SET(STND_SHIFTER);
+ printk( "STND_SHIFTER " );
+ }
+ }
+ if (hwreg_present( &mfp.par_dt_reg )) {
+ ATARIHW_SET(ST_MFP);
+ printk( "ST_MFP " );
+ }
+ if (hwreg_present( &tt_mfp.par_dt_reg )) {
+ ATARIHW_SET(TT_MFP);
+ printk( "TT_MFP " );
+ }
+ if (hwreg_present( &tt_scsi_dma.dma_addr_hi )) {
+ ATARIHW_SET(SCSI_DMA);
+ printk( "TT_SCSI_DMA " );
+ }
+ if (!MACH_IS_HADES && hwreg_present( &st_dma.dma_hi )) {
+ ATARIHW_SET(STND_DMA);
+ printk( "STND_DMA " );
+ }
+ if (MACH_IS_MEDUSA || /* The ST-DMA address registers aren't readable
+ * on all Medusas, so the test below may fail */
+ (hwreg_present( &st_dma.dma_vhi ) &&
+ (st_dma.dma_vhi = 0x55) && (st_dma.dma_hi = 0xaa) &&
+ st_dma.dma_vhi == 0x55 && st_dma.dma_hi == 0xaa &&
+ (st_dma.dma_vhi = 0xaa) && (st_dma.dma_hi = 0x55) &&
+ st_dma.dma_vhi == 0xaa && st_dma.dma_hi == 0x55)) {
+ ATARIHW_SET(EXTD_DMA);
+ printk( "EXTD_DMA " );
+ }
+ if (hwreg_present( &tt_scsi.scsi_data )) {
+ ATARIHW_SET(TT_SCSI);
+ printk( "TT_SCSI " );
+ }
+ if (hwreg_present( &sound_ym.rd_data_reg_sel )) {
+ ATARIHW_SET(YM_2149);
+ printk( "YM2149 " );
+ }
+ if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
+ hwreg_present( &tt_dmasnd.ctrl )) {
+ ATARIHW_SET(PCM_8BIT);
+ printk( "PCM " );
+ }
+ if (!MACH_IS_HADES && hwreg_present( &falcon_codec.unused5 )) {
+ ATARIHW_SET(CODEC);
+ printk( "CODEC " );
+ }
+ if (hwreg_present( &dsp56k_host_interface.icr )) {
+ ATARIHW_SET(DSP56K);
+ printk( "DSP56K " );
+ }
+ if (hwreg_present( &tt_scc_dma.dma_ctrl ) &&
+#if 0
+ /* This test sucks! Who knows some better? */
+ (tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) &&
+ (tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0)
+#else
+ !MACH_IS_MEDUSA && !MACH_IS_HADES
+#endif
+ ) {
+ ATARIHW_SET(SCC_DMA);
+ printk( "SCC_DMA " );
+ }
+ if (scc_test( &scc.cha_a_ctrl )) {
+ ATARIHW_SET(SCC);
+ printk( "SCC " );
+ }
+ if (scc_test( &st_escc.cha_b_ctrl )) {
+ ATARIHW_SET( ST_ESCC );
+ printk( "ST_ESCC " );
+ }
+ if (MACH_IS_HADES)
+ {
+ ATARIHW_SET( VME );
+ printk( "VME " );
+ }
+ else if (hwreg_present( &tt_scu.sys_mask )) {
+ ATARIHW_SET(SCU);
+ /* Assume a VME bus if there's a SCU */
+ ATARIHW_SET( VME );
+ printk( "VME SCU " );
+ }
+ if (hwreg_present( (void *)(0xffff9210) )) {
+ ATARIHW_SET(ANALOG_JOY);
+ printk( "ANALOG_JOY " );
+ }
+ if (!MACH_IS_HADES && hwreg_present( blitter.halftone )) {
+ ATARIHW_SET(BLITTER);
+ printk( "BLITTER " );
+ }
+ if (hwreg_present((void *)0xfff00039)) {
+ ATARIHW_SET(IDE);
+ printk( "IDE " );
+ }
+#if 1 /* This maybe wrong */
+ if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
+ hwreg_present( &tt_microwire.data ) &&
+ hwreg_present( &tt_microwire.mask ) &&
+ (tt_microwire.mask = 0x7ff,
+ udelay(1),
+ tt_microwire.data = MW_LM1992_PSG_HIGH | MW_LM1992_ADDR,
+ udelay(1),
+ tt_microwire.data != 0)) {
+ ATARIHW_SET(MICROWIRE);
+ while (tt_microwire.mask != 0x7ff) ;
+ printk( "MICROWIRE " );
+ }
+#endif
+ if (hwreg_present( &tt_rtc.regsel )) {
+ ATARIHW_SET(TT_CLK);
+ printk( "TT_CLK " );
+ mach_hwclk = atari_tt_hwclk;
+ mach_set_clock_mmss = atari_tt_set_clock_mmss;
+ }
+ if (!MACH_IS_HADES && hwreg_present( &mste_rtc.sec_ones)) {
+ ATARIHW_SET(MSTE_CLK);
+ printk( "MSTE_CLK ");
+ mach_hwclk = atari_mste_hwclk;
+ mach_set_clock_mmss = atari_mste_set_clock_mmss;
+ }
+ if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
+ hwreg_present( &dma_wd.fdc_speed ) &&
+ hwreg_write( &dma_wd.fdc_speed, 0 )) {
+ ATARIHW_SET(FDCSPEED);
+ printk( "FDC_SPEED ");
+ }
+ if (!MACH_IS_HADES && !ATARIHW_PRESENT(ST_SCSI)) {
+ ATARIHW_SET(ACSI);
+ printk( "ACSI " );
+ }
+ printk("\n");
+
+ if (CPU_IS_040_OR_060)
+ /* Now it seems to be safe to turn of the tt0 transparent
+ * translation (the one that must not be turned off in
+ * head.S...)
+ */
+ __asm__ volatile ("moveq #0,%/d0\n\t"
+ ".chip 68040\n\t"
+ "movec %%d0,%%itt0\n\t"
+ "movec %%d0,%%dtt0\n\t"
+ ".chip 68k"
+ : /* no outputs */
+ : /* no inputs */
+ : "d0");
+
+ /* allocator for memory that must reside in st-ram */
+ atari_stram_init ();
+
+ /* Set up a mapping for the VMEbus address region:
+ *
+ * VME is either at phys. 0xfexxxxxx (TT) or 0xa00000..0xdfffff
+ * (MegaSTE) In both cases, the whole 16 MB chunk is mapped at
+ * 0xfe000000 virt., because this can be done with a single
+ * transparent translation. On the 68040, lots of often unused
+ * page tables would be needed otherwise. On a MegaSTE or similar,
+ * the highest byte is stripped off by hardware due to the 24 bit
+ * design of the bus.
+ */
+
+ if (CPU_IS_020_OR_030) {
+ unsigned long tt1_val;
+ tt1_val = 0xfe008543; /* Translate 0xfexxxxxx, enable, cache
+ * inhibit, read and write, FDC mask = 3,
+ * FDC val = 4 -> Supervisor only */
+ __asm__ __volatile__ ( ".chip 68030\n\t"
+ "pmove %0@,%/tt1\n\t"
+ ".chip 68k"
+ : : "a" (&tt1_val) );
+ }
+ else {
+ __asm__ __volatile__
+ ( "movel %0,%/d0\n\t"
+ ".chip 68040\n\t"
+ "movec %%d0,%%itt1\n\t"
+ "movec %%d0,%%dtt1\n\t"
+ ".chip 68k"
+ :
+ : "g" (0xfe00a040) /* Translate 0xfexxxxxx, enable,
+ * supervisor only, non-cacheable/
+ * serialized, writable */
+ : "d0" );
+
+ }
+
+ /* Fetch tos version at Physical 2 */
+ /* We my not be able to access this address if the kernel is
+ loaded to st ram, since the first page is unmapped. On the
+ Medusa this is always the case and there is nothing we can do
+ about this, so we just assume the smaller offset. For the TT
+ we use the fact that in head.S we have set up a mapping
+ 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible
+ in the last 16MB of the address space. */
+ tos_version = (MACH_IS_MEDUSA || MACH_IS_HADES) ?
+ 0xfff : *(unsigned short *)0xff000002;
+ atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68;
+}
+
+#ifdef CONFIG_HEARTBEAT
+static void atari_heartbeat( int on )
+{
+ unsigned char tmp;
+ unsigned long flags;
+
+ if (atari_dont_touch_floppy_select)
+ return;
+
+ local_irq_save(flags);
+ sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
+ tmp = sound_ym.rd_data_reg_sel;
+ sound_ym.wd_data = on ? (tmp & ~0x02) : (tmp | 0x02);
+ local_irq_restore(flags);
+}
+#endif
+
+/* ++roman:
+ *
+ * This function does a reset on machines that lack the ability to
+ * assert the processor's _RESET signal somehow via hardware. It is
+ * based on the fact that you can find the initial SP and PC values
+ * after a reset at physical addresses 0 and 4. This works pretty well
+ * for Atari machines, since the lowest 8 bytes of physical memory are
+ * really ROM (mapped by hardware). For other 680x0 machines: don't
+ * know if it works...
+ *
+ * To get the values at addresses 0 and 4, the MMU better is turned
+ * off first. After that, we have to jump into physical address space
+ * (the PC before the pmove statement points to the virtual address of
+ * the code). Getting that physical address is not hard, but the code
+ * becomes a bit complex since I've tried to ensure that the jump
+ * statement after the pmove is in the cache already (otherwise the
+ * processor can't fetch it!). For that, the code first jumps to the
+ * jump statement with the (virtual) address of the pmove section in
+ * an address register . The jump statement is surely in the cache
+ * now. After that, that physical address of the reset code is loaded
+ * into the same address register, pmove is done and the same jump
+ * statements goes to the reset code. Since there are not many
+ * statements between the two jumps, I hope it stays in the cache.
+ *
+ * The C code makes heavy use of the GCC features that you can get the
+ * address of a C label. No hope to compile this with another compiler
+ * than GCC!
+ */
+
+/* ++andreas: no need for complicated code, just depend on prefetch */
+
+static void atari_reset (void)
+{
+ long tc_val = 0;
+ long reset_addr;
+
+ /* On the Medusa, phys. 0x4 may contain garbage because it's no
+ ROM. See above for explanation why we cannot use PTOV(4). */
+ reset_addr = MACH_IS_HADES ? 0x7fe00030 :
+ MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 :
+ *(unsigned long *) 0xff000004;
+
+ /* reset ACIA for switch off OverScan, if it's active */
+ if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
+ acia.key_ctrl = ACIA_RESET;
+ if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
+ acia.mid_ctrl = ACIA_RESET;
+
+ /* processor independent: turn off interrupts and reset the VBR;
+ * the caches must be left enabled, else prefetching the final jump
+ * instruction doesn't work. */
+ local_irq_disable();
+ __asm__ __volatile__
+ ("moveq #0,%/d0\n\t"
+ "movec %/d0,%/vbr"
+ : : : "d0" );
+
+ if (CPU_IS_040_OR_060) {
+ unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040);
+ if (CPU_IS_060) {
+ /* 68060: clear PCR to turn off superscalar operation */
+ __asm__ __volatile__
+ ("moveq #0,%/d0\n\t"
+ ".chip 68060\n\t"
+ "movec %%d0,%%pcr\n\t"
+ ".chip 68k"
+ : : : "d0" );
+ }
+
+ __asm__ __volatile__
+ ("movel %0,%/d0\n\t"
+ "andl #0xff000000,%/d0\n\t"
+ "orw #0xe020,%/d0\n\t" /* map 16 MB, enable, cacheable */
+ ".chip 68040\n\t"
+ "movec %%d0,%%itt0\n\t"
+ "movec %%d0,%%dtt0\n\t"
+ ".chip 68k\n\t"
+ "jmp %0@\n\t"
+ : /* no outputs */
+ : "a" (jmp_addr040)
+ : "d0" );
+ jmp_addr_label040:
+ __asm__ __volatile__
+ ("moveq #0,%/d0\n\t"
+ "nop\n\t"
+ ".chip 68040\n\t"
+ "cinva %%bc\n\t"
+ "nop\n\t"
+ "pflusha\n\t"
+ "nop\n\t"
+ "movec %%d0,%%tc\n\t"
+ "nop\n\t"
+ /* the following setup of transparent translations is needed on the
+ * Afterburner040 to successfully reboot. Other machines shouldn't
+ * care about a different tt regs setup, they also didn't care in
+ * the past that the regs weren't turned off. */
+ "movel #0xffc000,%%d0\n\t" /* whole insn space cacheable */
+ "movec %%d0,%%itt0\n\t"
+ "movec %%d0,%%itt1\n\t"
+ "orw #0x40,%/d0\n\t" /* whole data space non-cacheable/ser. */
+ "movec %%d0,%%dtt0\n\t"
+ "movec %%d0,%%dtt1\n\t"
+ ".chip 68k\n\t"
+ "jmp %0@"
+ : /* no outputs */
+ : "a" (reset_addr)
+ : "d0");
+ }
+ else
+ __asm__ __volatile__
+ ("pmove %0@,%/tc\n\t"
+ "jmp %1@"
+ : /* no outputs */
+ : "a" (&tc_val), "a" (reset_addr));
+}
+
+
+static void atari_get_model(char *model)
+{
+ strcpy(model, "Atari ");
+ switch (atari_mch_cookie >> 16) {
+ case ATARI_MCH_ST:
+ if (ATARIHW_PRESENT(MSTE_CLK))
+ strcat (model, "Mega ST");
+ else
+ strcat (model, "ST");
+ break;
+ case ATARI_MCH_STE:
+ if (MACH_IS_MSTE)
+ strcat (model, "Mega STE");
+ else
+ strcat (model, "STE");
+ break;
+ case ATARI_MCH_TT:
+ if (MACH_IS_MEDUSA)
+ /* Medusa has TT _MCH cookie */
+ strcat (model, "Medusa");
+ else if (MACH_IS_HADES)
+ strcat(model, "Hades");
+ else
+ strcat (model, "TT");
+ break;
+ case ATARI_MCH_FALCON:
+ strcat (model, "Falcon");
+ if (MACH_IS_AB40)
+ strcat (model, " (with Afterburner040)");
+ break;
+ default:
+ sprintf (model + strlen (model), "(unknown mach cookie 0x%lx)",
+ atari_mch_cookie);
+ break;
+ }
+}
+
+
+static int atari_get_hardware_list(char *buffer)
+{
+ int len = 0, i;
+
+ for (i = 0; i < m68k_num_memory; i++)
+ len += sprintf (buffer+len, "\t%3ld MB at 0x%08lx (%s)\n",
+ m68k_memory[i].size >> 20, m68k_memory[i].addr,
+ (m68k_memory[i].addr & 0xff000000 ?
+ "alternate RAM" : "ST-RAM"));
+
+#define ATARIHW_ANNOUNCE(name,str) \
+ if (ATARIHW_PRESENT(name)) \
+ len += sprintf (buffer + len, "\t%s\n", str)
+
+ len += sprintf (buffer + len, "Detected hardware:\n");
+ ATARIHW_ANNOUNCE(STND_SHIFTER, "ST Shifter");
+ ATARIHW_ANNOUNCE(EXTD_SHIFTER, "STe Shifter");
+ ATARIHW_ANNOUNCE(TT_SHIFTER, "TT Shifter");
+ ATARIHW_ANNOUNCE(VIDEL_SHIFTER, "Falcon Shifter");
+ ATARIHW_ANNOUNCE(YM_2149, "Programmable Sound Generator");
+ ATARIHW_ANNOUNCE(PCM_8BIT, "PCM 8 Bit Sound");
+ ATARIHW_ANNOUNCE(CODEC, "CODEC Sound");
+ ATARIHW_ANNOUNCE(TT_SCSI, "SCSI Controller NCR5380 (TT style)");
+ ATARIHW_ANNOUNCE(ST_SCSI, "SCSI Controller NCR5380 (Falcon style)");
+ ATARIHW_ANNOUNCE(ACSI, "ACSI Interface");
+ ATARIHW_ANNOUNCE(IDE, "IDE Interface");
+ ATARIHW_ANNOUNCE(FDCSPEED, "8/16 Mhz Switch for FDC");
+ ATARIHW_ANNOUNCE(ST_MFP, "Multi Function Peripheral MFP 68901");
+ ATARIHW_ANNOUNCE(TT_MFP, "Second Multi Function Peripheral MFP 68901");
+ ATARIHW_ANNOUNCE(SCC, "Serial Communications Controller SCC 8530");
+ ATARIHW_ANNOUNCE(ST_ESCC, "Extended Serial Communications Controller SCC 85230");
+ ATARIHW_ANNOUNCE(ANALOG_JOY, "Paddle Interface");
+ ATARIHW_ANNOUNCE(MICROWIRE, "MICROWIRE(tm) Interface");
+ ATARIHW_ANNOUNCE(STND_DMA, "DMA Controller (24 bit)");
+ ATARIHW_ANNOUNCE(EXTD_DMA, "DMA Controller (32 bit)");
+ ATARIHW_ANNOUNCE(SCSI_DMA, "DMA Controller for NCR5380");
+ ATARIHW_ANNOUNCE(SCC_DMA, "DMA Controller for SCC");
+ ATARIHW_ANNOUNCE(TT_CLK, "Clock Chip MC146818A");
+ ATARIHW_ANNOUNCE(MSTE_CLK, "Clock Chip RP5C15");
+ ATARIHW_ANNOUNCE(SCU, "System Control Unit");
+ ATARIHW_ANNOUNCE(BLITTER, "Blitter");
+ ATARIHW_ANNOUNCE(VME, "VME Bus");
+ ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor");
+
+ return(len);
+}
+
+/*
+ * Local variables:
+ * c-indent-level: 4
+ * tab-width: 8
+ * End:
+ */
diff --git a/arch/m68k/atari/debug.c b/arch/m68k/atari/debug.c
new file mode 100644
index 0000000..ace05f7
--- /dev/null
+++ b/arch/m68k/atari/debug.c
@@ -0,0 +1,347 @@
+/*
+ * linux/arch/m68k/atari/debug.c
+ *
+ * Atari debugging and serial console stuff
+ *
+ * Assembled of parts of former atari/config.c 97-12-18 by Roman Hodek
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+
+extern char m68k_debug_device[];
+
+/* Flag that Modem1 port is already initialized and used */
+int atari_MFP_init_done;
+/* Flag that Modem1 port is already initialized and used */
+int atari_SCC_init_done;
+/* Can be set somewhere, if a SCC master reset has already be done and should
+ * not be repeated; used by kgdb */
+int atari_SCC_reset_done;
+
+static struct console atari_console_driver = {
+ .name = "debug",
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+
+static inline void ata_mfp_out (char c)
+{
+ while (!(mfp.trn_stat & 0x80)) /* wait for tx buf empty */
+ barrier ();
+ mfp.usart_dta = c;
+}
+
+void atari_mfp_console_write (struct console *co, const char *str,
+ unsigned int count)
+{
+ while (count--) {
+ if (*str == '\n')
+ ata_mfp_out( '\r' );
+ ata_mfp_out( *str++ );
+ }
+}
+
+static inline void ata_scc_out (char c)
+{
+ do {
+ MFPDELAY();
+ } while (!(scc.cha_b_ctrl & 0x04)); /* wait for tx buf empty */
+ MFPDELAY();
+ scc.cha_b_data = c;
+}
+
+void atari_scc_console_write (struct console *co, const char *str,
+ unsigned int count)
+{
+ while (count--) {
+ if (*str == '\n')
+ ata_scc_out( '\r' );
+ ata_scc_out( *str++ );
+ }
+}
+
+static inline void ata_midi_out (char c)
+{
+ while (!(acia.mid_ctrl & ACIA_TDRE)) /* wait for tx buf empty */
+ barrier ();
+ acia.mid_data = c;
+}
+
+void atari_midi_console_write (struct console *co, const char *str,
+ unsigned int count)
+{
+ while (count--) {
+ if (*str == '\n')
+ ata_midi_out( '\r' );
+ ata_midi_out( *str++ );
+ }
+}
+
+static int ata_par_out (char c)
+{
+ unsigned char tmp;
+ /* This a some-seconds timeout in case no printer is connected */
+ unsigned long i = loops_per_jiffy > 1 ? loops_per_jiffy : 10000000/HZ;
+
+ while( (mfp.par_dt_reg & 1) && --i ) /* wait for BUSY == L */
+ ;
+ if (!i) return( 0 );
+
+ sound_ym.rd_data_reg_sel = 15; /* select port B */
+ sound_ym.wd_data = c; /* put char onto port */
+ sound_ym.rd_data_reg_sel = 14; /* select port A */
+ tmp = sound_ym.rd_data_reg_sel;
+ sound_ym.wd_data = tmp & ~0x20; /* set strobe L */
+ MFPDELAY(); /* wait a bit */
+ sound_ym.wd_data = tmp | 0x20; /* set strobe H */
+ return( 1 );
+}
+
+static void atari_par_console_write (struct console *co, const char *str,
+ unsigned int count)
+{
+ static int printer_present = 1;
+
+ if (!printer_present)
+ return;
+
+ while (count--) {
+ if (*str == '\n')
+ if (!ata_par_out( '\r' )) {
+ printer_present = 0;
+ return;
+ }
+ if (!ata_par_out( *str++ )) {
+ printer_present = 0;
+ return;
+ }
+ }
+}
+
+#ifdef CONFIG_SERIAL_CONSOLE
+int atari_mfp_console_wait_key(struct console *co)
+{
+ while( !(mfp.rcv_stat & 0x80) ) /* wait for rx buf filled */
+ barrier();
+ return( mfp.usart_dta );
+}
+
+int atari_scc_console_wait_key(struct console *co)
+{
+ do {
+ MFPDELAY();
+ } while( !(scc.cha_b_ctrl & 0x01) ); /* wait for rx buf filled */
+ MFPDELAY();
+ return( scc.cha_b_data );
+}
+
+int atari_midi_console_wait_key(struct console *co)
+{
+ while( !(acia.mid_ctrl & ACIA_RDRF) ) /* wait for rx buf filled */
+ barrier();
+ return( acia.mid_data );
+}
+#endif
+
+/* The following two functions do a quick'n'dirty initialization of the MFP or
+ * SCC serial ports. They're used by the debugging interface, kgdb, and the
+ * serial console code. */
+#ifndef CONFIG_SERIAL_CONSOLE
+static void __init atari_init_mfp_port( int cflag )
+#else
+void atari_init_mfp_port( int cflag )
+#endif
+{
+ /* timer values for 1200...115200 bps; > 38400 select 110, 134, or 150
+ * bps, resp., and work only correct if there's a RSVE or RSSPEED */
+ static int baud_table[9] = { 16, 11, 8, 4, 2, 1, 175, 143, 128 };
+ int baud = cflag & CBAUD;
+ int parity = (cflag & PARENB) ? ((cflag & PARODD) ? 0x04 : 0x06) : 0;
+ int csize = ((cflag & CSIZE) == CS7) ? 0x20 : 0x00;
+
+ if (cflag & CBAUDEX)
+ baud += B38400;
+ if (baud < B1200 || baud > B38400+2)
+ baud = B9600; /* use default 9600bps for non-implemented rates */
+ baud -= B1200; /* baud_table[] starts at 1200bps */
+
+ mfp.trn_stat &= ~0x01; /* disable TX */
+ mfp.usart_ctr = parity | csize | 0x88; /* 1:16 clk mode, 1 stop bit */
+ mfp.tim_ct_cd &= 0x70; /* stop timer D */
+ mfp.tim_dt_d = baud_table[baud];
+ mfp.tim_ct_cd |= 0x01; /* start timer D, 1:4 */
+ mfp.trn_stat |= 0x01; /* enable TX */
+
+ atari_MFP_init_done = 1;
+}
+
+#define SCC_WRITE(reg,val) \
+ do { \
+ scc.cha_b_ctrl = (reg); \
+ MFPDELAY(); \
+ scc.cha_b_ctrl = (val); \
+ MFPDELAY(); \
+ } while(0)
+
+/* loops_per_jiffy isn't initialized yet, so we can't use udelay(). This does a
+ * delay of ~ 60us. */
+#define LONG_DELAY() \
+ do { \
+ int i; \
+ for( i = 100; i > 0; --i ) \
+ MFPDELAY(); \
+ } while(0)
+
+#ifndef CONFIG_SERIAL_CONSOLE
+static void __init atari_init_scc_port( int cflag )
+#else
+void atari_init_scc_port( int cflag )
+#endif
+{
+ extern int atari_SCC_reset_done;
+ static int clksrc_table[9] =
+ /* reg 11: 0x50 = BRG, 0x00 = RTxC, 0x28 = TRxC */
+ { 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x00, 0x00 };
+ static int brgsrc_table[9] =
+ /* reg 14: 0 = RTxC, 2 = PCLK */
+ { 2, 2, 2, 2, 2, 2, 0, 2, 2 };
+ static int clkmode_table[9] =
+ /* reg 4: 0x40 = x16, 0x80 = x32, 0xc0 = x64 */
+ { 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0xc0, 0x80 };
+ static int div_table[9] =
+ /* reg12 (BRG low) */
+ { 208, 138, 103, 50, 24, 11, 1, 0, 0 };
+
+ int baud = cflag & CBAUD;
+ int clksrc, clkmode, div, reg3, reg5;
+
+ if (cflag & CBAUDEX)
+ baud += B38400;
+ if (baud < B1200 || baud > B38400+2)
+ baud = B9600; /* use default 9600bps for non-implemented rates */
+ baud -= B1200; /* tables starts at 1200bps */
+
+ clksrc = clksrc_table[baud];
+ clkmode = clkmode_table[baud];
+ div = div_table[baud];
+ if (ATARIHW_PRESENT(TT_MFP) && baud >= 6) {
+ /* special treatment for TT, where rates >= 38400 are done via TRxC */
+ clksrc = 0x28; /* TRxC */
+ clkmode = baud == 6 ? 0xc0 :
+ baud == 7 ? 0x80 : /* really 76800bps */
+ 0x40; /* really 153600bps */
+ div = 0;
+ }
+
+ reg3 = (cflag & CSIZE) == CS8 ? 0xc0 : 0x40;
+ reg5 = (cflag & CSIZE) == CS8 ? 0x60 : 0x20 | 0x82 /* assert DTR/RTS */;
+
+ (void)scc.cha_b_ctrl; /* reset reg pointer */
+ SCC_WRITE( 9, 0xc0 ); /* reset */
+ LONG_DELAY(); /* extra delay after WR9 access */
+ SCC_WRITE( 4, (cflag & PARENB) ? ((cflag & PARODD) ? 0x01 : 0x03) : 0 |
+ 0x04 /* 1 stopbit */ |
+ clkmode );
+ SCC_WRITE( 3, reg3 );
+ SCC_WRITE( 5, reg5 );
+ SCC_WRITE( 9, 0 ); /* no interrupts */
+ LONG_DELAY(); /* extra delay after WR9 access */
+ SCC_WRITE( 10, 0 ); /* NRZ mode */
+ SCC_WRITE( 11, clksrc ); /* main clock source */
+ SCC_WRITE( 12, div ); /* BRG value */
+ SCC_WRITE( 13, 0 ); /* BRG high byte */
+ SCC_WRITE( 14, brgsrc_table[baud] );
+ SCC_WRITE( 14, brgsrc_table[baud] | (div ? 1 : 0) );
+ SCC_WRITE( 3, reg3 | 1 );
+ SCC_WRITE( 5, reg5 | 8 );
+
+ atari_SCC_reset_done = 1;
+ atari_SCC_init_done = 1;
+}
+
+#ifndef CONFIG_SERIAL_CONSOLE
+static void __init atari_init_midi_port( int cflag )
+#else
+void atari_init_midi_port( int cflag )
+#endif
+{
+ int baud = cflag & CBAUD;
+ int csize = ((cflag & CSIZE) == CS8) ? 0x10 : 0x00;
+ /* warning 7N1 isn't possible! (instead 7O2 is used...) */
+ int parity = (cflag & PARENB) ? ((cflag & PARODD) ? 0x0c : 0x08) : 0x04;
+ int div;
+
+ /* 4800 selects 7812.5, 115200 selects 500000, all other (incl. 9600 as
+ * default) the standard MIDI speed 31250. */
+ if (cflag & CBAUDEX)
+ baud += B38400;
+ if (baud == B4800)
+ div = ACIA_DIV64; /* really 7812.5 bps */
+ else if (baud == B38400+2 /* 115200 */)
+ div = ACIA_DIV1; /* really 500 kbps (does that work??) */
+ else
+ div = ACIA_DIV16; /* 31250 bps, standard for MIDI */
+
+ /* RTS low, ints disabled */
+ acia.mid_ctrl = div | csize | parity |
+ ((atari_switches & ATARI_SWITCH_MIDI) ?
+ ACIA_RHTID : ACIA_RLTID);
+}
+
+void __init atari_debug_init(void)
+{
+ if (!strcmp( m68k_debug_device, "ser" )) {
+ /* defaults to ser2 for a Falcon and ser1 otherwise */
+ strcpy( m68k_debug_device, MACH_IS_FALCON ? "ser2" : "ser1" );
+
+ }
+
+ if (!strcmp( m68k_debug_device, "ser1" )) {
+ /* ST-MFP Modem1 serial port */
+ atari_init_mfp_port( B9600|CS8 );
+ atari_console_driver.write = atari_mfp_console_write;
+ }
+ else if (!strcmp( m68k_debug_device, "ser2" )) {
+ /* SCC Modem2 serial port */
+ atari_init_scc_port( B9600|CS8 );
+ atari_console_driver.write = atari_scc_console_write;
+ }
+ else if (!strcmp( m68k_debug_device, "midi" )) {
+ /* MIDI port */
+ atari_init_midi_port( B9600|CS8 );
+ atari_console_driver.write = atari_midi_console_write;
+ }
+ else if (!strcmp( m68k_debug_device, "par" )) {
+ /* parallel printer */
+ atari_turnoff_irq( IRQ_MFP_BUSY ); /* avoid ints */
+ sound_ym.rd_data_reg_sel = 7; /* select mixer control */
+ sound_ym.wd_data = 0xff; /* sound off, ports are output */
+ sound_ym.rd_data_reg_sel = 15; /* select port B */
+ sound_ym.wd_data = 0; /* no char */
+ sound_ym.rd_data_reg_sel = 14; /* select port A */
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x20; /* strobe H */
+ atari_console_driver.write = atari_par_console_write;
+ }
+ if (atari_console_driver.write)
+ register_console(&atari_console_driver);
+}
+
+/*
+ * Local variables:
+ * c-indent-level: 4
+ * tab-width: 8
+ * End:
+ */
diff --git a/arch/m68k/atari/hades-pci.c b/arch/m68k/atari/hades-pci.c
new file mode 100644
index 0000000..8888deb
--- /dev/null
+++ b/arch/m68k/atari/hades-pci.c
@@ -0,0 +1,444 @@
+/*
+ * hades-pci.c - Hardware specific PCI BIOS functions the Hades Atari clone.
+ *
+ * Written by Wout Klaren.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+
+#if 0
+# define DBG_DEVS(args) printk args
+#else
+# define DBG_DEVS(args)
+#endif
+
+#if defined(CONFIG_PCI) && defined(CONFIG_HADES)
+
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/byteorder.h>
+#include <asm/pci.h>
+
+#define HADES_MEM_BASE 0x80000000
+#define HADES_MEM_SIZE 0x20000000
+#define HADES_CONFIG_BASE 0xA0000000
+#define HADES_CONFIG_SIZE 0x10000000
+#define HADES_IO_BASE 0xB0000000
+#define HADES_IO_SIZE 0x10000000
+#define HADES_VIRT_IO_SIZE 0x00010000 /* Only 64k is remapped and actually used. */
+
+#define N_SLOTS 4 /* Number of PCI slots. */
+
+static const char pci_mem_name[] = "PCI memory space";
+static const char pci_io_name[] = "PCI I/O space";
+static const char pci_config_name[] = "PCI config space";
+
+static struct resource config_space = {
+ .name = pci_config_name,
+ .start = HADES_CONFIG_BASE,
+ .end = HADES_CONFIG_BASE + HADES_CONFIG_SIZE - 1
+};
+static struct resource io_space = {
+ .name = pci_io_name,
+ .start = HADES_IO_BASE,
+ .end = HADES_IO_BASE + HADES_IO_SIZE - 1
+};
+
+static const unsigned long pci_conf_base_phys[] = {
+ 0xA0080000, 0xA0040000, 0xA0020000, 0xA0010000
+};
+static unsigned long pci_conf_base_virt[N_SLOTS];
+static unsigned long pci_io_base_virt;
+
+/*
+ * static void *mk_conf_addr(unsigned char bus, unsigned char device_fn,
+ * unsigned char where)
+ *
+ * Calculate the address of the PCI configuration area of the given
+ * device.
+ *
+ * BUG: boards with multiple functions are probably not correctly
+ * supported.
+ */
+
+static void *mk_conf_addr(struct pci_dev *dev, int where)
+{
+ int device = dev->devfn >> 3, function = dev->devfn & 7;
+ void *result;
+
+ DBG_DEVS(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, pci_addr=0x%p)\n",
+ dev->bus->number, dev->devfn, where, pci_addr));
+
+ if (device > 3)
+ {
+ DBG_DEVS(("mk_conf_addr: device (%d) > 3, returning NULL\n", device));
+ return NULL;
+ }
+
+ if (dev->bus->number != 0)
+ {
+ DBG_DEVS(("mk_conf_addr: bus (%d) > 0, returning NULL\n", device));
+ return NULL;
+ }
+
+ result = (void *) (pci_conf_base_virt[device] | (function << 8) | (where));
+ DBG_DEVS(("mk_conf_addr: returning pci_addr 0x%lx\n", (unsigned long) result));
+ return result;
+}
+
+static int hades_read_config_byte(struct pci_dev *dev, int where, u8 *value)
+{
+ volatile unsigned char *pci_addr;
+
+ *value = 0xff;
+
+ if ((pci_addr = (unsigned char *) mk_conf_addr(dev, where)) == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ *value = *pci_addr;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int hades_read_config_word(struct pci_dev *dev, int where, u16 *value)
+{
+ volatile unsigned short *pci_addr;
+
+ *value = 0xffff;
+
+ if (where & 0x1)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ if ((pci_addr = (unsigned short *) mk_conf_addr(dev, where)) == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ *value = le16_to_cpu(*pci_addr);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int hades_read_config_dword(struct pci_dev *dev, int where, u32 *value)
+{
+ volatile unsigned int *pci_addr;
+ unsigned char header_type;
+ int result;
+
+ *value = 0xffffffff;
+
+ if (where & 0x3)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ if ((pci_addr = (unsigned int *) mk_conf_addr(dev, where)) == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ *value = le32_to_cpu(*pci_addr);
+
+ /*
+ * Check if the value is an address on the bus. If true, add the
+ * base address of the PCI memory or PCI I/O area on the Hades.
+ */
+
+ if ((result = hades_read_config_byte(dev, PCI_HEADER_TYPE,
+ &header_type)) != PCIBIOS_SUCCESSFUL)
+ return result;
+
+ if (((where >= PCI_BASE_ADDRESS_0) && (where <= PCI_BASE_ADDRESS_1)) ||
+ ((header_type != PCI_HEADER_TYPE_BRIDGE) && ((where >= PCI_BASE_ADDRESS_2) &&
+ (where <= PCI_BASE_ADDRESS_5))))
+ {
+ if ((*value & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO)
+ {
+ /*
+ * Base address register that contains an I/O address. If the
+ * address is valid on the Hades (0 <= *value < HADES_VIRT_IO_SIZE),
+ * add 'pci_io_base_virt' to the value.
+ */
+
+ if (*value < HADES_VIRT_IO_SIZE)
+ *value += pci_io_base_virt;
+ }
+ else
+ {
+ /*
+ * Base address register that contains an memory address. If the
+ * address is valid on the Hades (0 <= *value < HADES_MEM_SIZE),
+ * add HADES_MEM_BASE to the value.
+ */
+
+ if (*value == 0)
+ {
+ /*
+ * Base address is 0. Test if this base
+ * address register is used.
+ */
+
+ *pci_addr = 0xffffffff;
+ if (*pci_addr != 0)
+ {
+ *pci_addr = *value;
+ if (*value < HADES_MEM_SIZE)
+ *value += HADES_MEM_BASE;
+ }
+ }
+ else
+ {
+ if (*value < HADES_MEM_SIZE)
+ *value += HADES_MEM_BASE;
+ }
+ }
+ }
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int hades_write_config_byte(struct pci_dev *dev, int where, u8 value)
+{
+ volatile unsigned char *pci_addr;
+
+ if ((pci_addr = (unsigned char *) mk_conf_addr(dev, where)) == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ *pci_addr = value;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int hades_write_config_word(struct pci_dev *dev, int where, u16 value)
+{
+ volatile unsigned short *pci_addr;
+
+ if ((pci_addr = (unsigned short *) mk_conf_addr(dev, where)) == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ *pci_addr = cpu_to_le16(value);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int hades_write_config_dword(struct pci_dev *dev, int where, u32 value)
+{
+ volatile unsigned int *pci_addr;
+ unsigned char header_type;
+ int result;
+
+ if ((pci_addr = (unsigned int *) mk_conf_addr(dev, where)) == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /*
+ * Check if the value is an address on the bus. If true, subtract the
+ * base address of the PCI memory or PCI I/O area on the Hades.
+ */
+
+ if ((result = hades_read_config_byte(dev, PCI_HEADER_TYPE,
+ &header_type)) != PCIBIOS_SUCCESSFUL)
+ return result;
+
+ if (((where >= PCI_BASE_ADDRESS_0) && (where <= PCI_BASE_ADDRESS_1)) ||
+ ((header_type != PCI_HEADER_TYPE_BRIDGE) && ((where >= PCI_BASE_ADDRESS_2) &&
+ (where <= PCI_BASE_ADDRESS_5))))
+ {
+ if ((value & PCI_BASE_ADDRESS_SPACE) ==
+ PCI_BASE_ADDRESS_SPACE_IO)
+ {
+ /*
+ * I/O address. Check if the address is valid address on
+ * the Hades (pci_io_base_virt <= value < pci_io_base_virt +
+ * HADES_VIRT_IO_SIZE) or if the value is 0xffffffff. If not
+ * true do not write the base address register. If it is a
+ * valid base address subtract 'pci_io_base_virt' from the value.
+ */
+
+ if ((value >= pci_io_base_virt) && (value < (pci_io_base_virt +
+ HADES_VIRT_IO_SIZE)))
+ value -= pci_io_base_virt;
+ else
+ {
+ if (value != 0xffffffff)
+ return PCIBIOS_SET_FAILED;
+ }
+ }
+ else
+ {
+ /*
+ * Memory address. Check if the address is valid address on
+ * the Hades (HADES_MEM_BASE <= value < HADES_MEM_BASE + HADES_MEM_SIZE) or
+ * if the value is 0xffffffff. If not true do not write
+ * the base address register. If it is a valid base address
+ * subtract HADES_MEM_BASE from the value.
+ */
+
+ if ((value >= HADES_MEM_BASE) && (value < (HADES_MEM_BASE + HADES_MEM_SIZE)))
+ value -= HADES_MEM_BASE;
+ else
+ {
+ if (value != 0xffffffff)
+ return PCIBIOS_SET_FAILED;
+ }
+ }
+ }
+
+ *pci_addr = cpu_to_le32(value);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+/*
+ * static inline void hades_fixup(void)
+ *
+ * Assign IRQ numbers as used by Linux to the interrupt pins
+ * of the PCI cards.
+ */
+
+static void __init hades_fixup(int pci_modify)
+{
+ char irq_tab[4] = {
+ [0] = IRQ_TT_MFP_IO0, /* Slot 0. */
+ [1] = IRQ_TT_MFP_IO1, /* Slot 1. */
+ [2] = IRQ_TT_MFP_SCC, /* Slot 2. */
+ [3] = IRQ_TT_MFP_SCSIDMA /* Slot 3. */
+ };
+ struct pci_dev *dev = NULL;
+ unsigned char slot;
+
+ /*
+ * Go through all devices, fixing up irqs as we see fit:
+ */
+
+ while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
+ {
+ if (dev->class >> 16 != PCI_BASE_CLASS_BRIDGE)
+ {
+ slot = PCI_SLOT(dev->devfn); /* Determine slot number. */
+ dev->irq = irq_tab[slot];
+ if (pci_modify)
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+ }
+ }
+}
+
+/*
+ * static void hades_conf_device(struct pci_dev *dev)
+ *
+ * Machine dependent Configure the given device.
+ *
+ * Parameters:
+ *
+ * dev - the pci device.
+ */
+
+static void __init hades_conf_device(struct pci_dev *dev)
+{
+ pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0);
+}
+
+static struct pci_ops hades_pci_ops = {
+ .read_byte = hades_read_config_byte,
+ .read_word = hades_read_config_word,
+ .read_dword = hades_read_config_dword,
+ .write_byte = hades_write_config_byte,
+ .write_word = hades_write_config_word,
+ .write_dword = hades_write_config_dword
+};
+
+/*
+ * struct pci_bus_info *init_hades_pci(void)
+ *
+ * Machine specific initialisation:
+ *
+ * - Allocate and initialise a 'pci_bus_info' structure
+ * - Initialise hardware
+ *
+ * Result: pointer to 'pci_bus_info' structure.
+ */
+
+struct pci_bus_info * __init init_hades_pci(void)
+{
+ struct pci_bus_info *bus;
+ int i;
+
+ /*
+ * Remap I/O and configuration space.
+ */
+
+ pci_io_base_virt = (unsigned long) ioremap(HADES_IO_BASE, HADES_VIRT_IO_SIZE);
+
+ for (i = 0; i < N_SLOTS; i++)
+ pci_conf_base_virt[i] = (unsigned long) ioremap(pci_conf_base_phys[i], 0x10000);
+
+ /*
+ * Allocate memory for bus info structure.
+ */
+
+ bus = kmalloc(sizeof(struct pci_bus_info), GFP_KERNEL);
+ if (!bus)
+ return NULL;
+ memset(bus, 0, sizeof(struct pci_bus_info));
+
+ /*
+ * Claim resources. The m68k has no separate I/O space, both
+ * PCI memory space and PCI I/O space are in memory space. Therefore
+ * the I/O resources are requested in memory space as well.
+ */
+
+ if (request_resource(&iomem_resource, &config_space) != 0)
+ {
+ kfree(bus);
+ return NULL;
+ }
+
+ if (request_resource(&iomem_resource, &io_space) != 0)
+ {
+ release_resource(&config_space);
+ kfree(bus);
+ return NULL;
+ }
+
+ bus->mem_space.start = HADES_MEM_BASE;
+ bus->mem_space.end = HADES_MEM_BASE + HADES_MEM_SIZE - 1;
+ bus->mem_space.name = pci_mem_name;
+#if 1
+ if (request_resource(&iomem_resource, &bus->mem_space) != 0)
+ {
+ release_resource(&io_space);
+ release_resource(&config_space);
+ kfree(bus);
+ return NULL;
+ }
+#endif
+ bus->io_space.start = pci_io_base_virt;
+ bus->io_space.end = pci_io_base_virt + HADES_VIRT_IO_SIZE - 1;
+ bus->io_space.name = pci_io_name;
+#if 1
+ if (request_resource(&ioport_resource, &bus->io_space) != 0)
+ {
+ release_resource(&bus->mem_space);
+ release_resource(&io_space);
+ release_resource(&config_space);
+ kfree(bus);
+ return NULL;
+ }
+#endif
+ /*
+ * Set hardware dependent functions.
+ */
+
+ bus->m68k_pci_ops = &hades_pci_ops;
+ bus->fixup = hades_fixup;
+ bus->conf_device = hades_conf_device;
+
+ /*
+ * Select high to low edge for PCI interrupts.
+ */
+
+ tt_mfp.active_edge &= ~0x27;
+
+ return bus;
+}
+#endif
diff --git a/arch/m68k/atari/stdma.c b/arch/m68k/atari/stdma.c
new file mode 100644
index 0000000..288f5e6
--- /dev/null
+++ b/arch/m68k/atari/stdma.c
@@ -0,0 +1,196 @@
+/*
+ * linux/arch/m68k/atari/stmda.c
+ *
+ * Copyright (C) 1994 Roman Hodek
+ *
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+
+/* This file contains some function for controlling the access to the */
+/* ST-DMA chip that may be shared between devices. Currently we have: */
+/* TT: Floppy and ACSI bus */
+/* Falcon: Floppy and SCSI */
+/* */
+/* The controlling functions set up a wait queue for access to the */
+/* ST-DMA chip. Callers to stdma_lock() that cannot granted access are */
+/* put onto a queue and waked up later if the owner calls */
+/* stdma_release(). Additionally, the caller gives his interrupt */
+/* service routine to stdma_lock(). */
+/* */
+/* On the Falcon, the IDE bus uses just the ACSI/Floppy interrupt, but */
+/* not the ST-DMA chip itself. So falhd.c needs not to lock the */
+/* chip. The interrupt is routed to falhd.c if IDE is configured, the */
+/* model is a Falcon and the interrupt was caused by the HD controller */
+/* (can be determined by looking at its status register). */
+
+
+#include <linux/types.h>
+#include <linux/kdev_t.h>
+#include <linux/genhd.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+
+#include <asm/atari_stdma.h>
+#include <asm/atariints.h>
+#include <asm/atarihw.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+static int stdma_locked; /* the semaphore */
+ /* int func to be called */
+static irqreturn_t (*stdma_isr)(int, void *, struct pt_regs *);
+static void *stdma_isr_data; /* data passed to isr */
+static DECLARE_WAIT_QUEUE_HEAD(stdma_wait); /* wait queue for ST-DMA */
+
+
+
+
+/***************************** Prototypes *****************************/
+
+static irqreturn_t stdma_int (int irq, void *dummy, struct pt_regs *fp);
+
+/************************* End of Prototypes **************************/
+
+
+
+/*
+ * Function: void stdma_lock( isrfunc isr, void *data )
+ *
+ * Purpose: Tries to get a lock on the ST-DMA chip that is used by more
+ * then one device driver. Waits on stdma_wait until lock is free.
+ * stdma_lock() may not be called from an interrupt! You have to
+ * get the lock in your main routine and release it when your
+ * request is finished.
+ *
+ * Inputs: A interrupt function that is called until the lock is
+ * released.
+ *
+ * Returns: nothing
+ *
+ */
+
+void stdma_lock(irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ void *data)
+{
+ unsigned long flags;
+
+ local_irq_save(flags); /* protect lock */
+
+ /* Since the DMA is used for file system purposes, we
+ have to sleep uninterruptible (there may be locked
+ buffers) */
+ wait_event(stdma_wait, !stdma_locked);
+
+ stdma_locked = 1;
+ stdma_isr = handler;
+ stdma_isr_data = data;
+ local_irq_restore(flags);
+}
+
+
+/*
+ * Function: void stdma_release( void )
+ *
+ * Purpose: Releases the lock on the ST-DMA chip.
+ *
+ * Inputs: none
+ *
+ * Returns: nothing
+ *
+ */
+
+void stdma_release(void)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ stdma_locked = 0;
+ stdma_isr = NULL;
+ stdma_isr_data = NULL;
+ wake_up(&stdma_wait);
+
+ local_irq_restore(flags);
+}
+
+
+/*
+ * Function: int stdma_others_waiting( void )
+ *
+ * Purpose: Check if someone waits for the ST-DMA lock.
+ *
+ * Inputs: none
+ *
+ * Returns: 0 if no one is waiting, != 0 otherwise
+ *
+ */
+
+int stdma_others_waiting(void)
+{
+ return waitqueue_active(&stdma_wait);
+}
+
+
+/*
+ * Function: int stdma_islocked( void )
+ *
+ * Purpose: Check if the ST-DMA is currently locked.
+ * Note: Returned status is only valid if ints are disabled while calling and
+ * as long as they remain disabled.
+ * If called with ints enabled, status can change only from locked to
+ * unlocked, because ints may not lock the ST-DMA.
+ *
+ * Inputs: none
+ *
+ * Returns: != 0 if locked, 0 otherwise
+ *
+ */
+
+int stdma_islocked(void)
+{
+ return stdma_locked;
+}
+
+
+/*
+ * Function: void stdma_init( void )
+ *
+ * Purpose: Initialize the ST-DMA chip access controlling.
+ * It sets up the interrupt and its service routine. The int is registered
+ * as slow int, client devices have to live with that (no problem
+ * currently).
+ *
+ * Inputs: none
+ *
+ * Return: nothing
+ *
+ */
+
+void __init stdma_init(void)
+{
+ stdma_isr = NULL;
+ request_irq(IRQ_MFP_FDC, stdma_int, IRQ_TYPE_SLOW,
+ "ST-DMA: floppy/ACSI/IDE/Falcon-SCSI", stdma_int);
+}
+
+
+/*
+ * Function: void stdma_int()
+ *
+ * Purpose: The interrupt routine for the ST-DMA. It calls the isr
+ * registered by stdma_lock().
+ *
+ */
+
+static irqreturn_t stdma_int(int irq, void *dummy, struct pt_regs *fp)
+{
+ if (stdma_isr)
+ (*stdma_isr)(irq, stdma_isr_data, fp);
+ return IRQ_HANDLED;
+}
diff --git a/arch/m68k/atari/stram.c b/arch/m68k/atari/stram.c
new file mode 100644
index 0000000..5a3c106
--- /dev/null
+++ b/arch/m68k/atari/stram.c
@@ -0,0 +1,1247 @@
+/*
+ * arch/m68k/atari/stram.c: Functions for ST-RAM allocations
+ *
+ * Copyright 1994-97 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/kdev_t.h>
+#include <linux/major.h>
+#include <linux/init.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/pagemap.h>
+#include <linux/shm.h>
+#include <linux/bootmem.h>
+#include <linux/mount.h>
+#include <linux/blkdev.h>
+
+#include <asm/setup.h>
+#include <asm/machdep.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/atarihw.h>
+#include <asm/atari_stram.h>
+#include <asm/io.h>
+#include <asm/semaphore.h>
+
+#include <linux/swapops.h>
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define DPRINTK(fmt,args...) printk( fmt, ##args )
+#else
+#define DPRINTK(fmt,args...)
+#endif
+
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_STRAM_PROC)
+/* abbrev for the && above... */
+#define DO_PROC
+#include <linux/proc_fs.h>
+#endif
+
+/* Pre-swapping comments:
+ *
+ * ++roman:
+ *
+ * New version of ST-Ram buffer allocation. Instead of using the
+ * 1 MB - 4 KB that remain when the ST-Ram chunk starts at $1000
+ * (1 MB granularity!), such buffers are reserved like this:
+ *
+ * - If the kernel resides in ST-Ram anyway, we can take the buffer
+ * from behind the current kernel data space the normal way
+ * (incrementing start_mem).
+ *
+ * - If the kernel is in TT-Ram, stram_init() initializes start and
+ * end of the available region. Buffers are allocated from there
+ * and mem_init() later marks the such used pages as reserved.
+ * Since each TT-Ram chunk is at least 4 MB in size, I hope there
+ * won't be an overrun of the ST-Ram region by normal kernel data
+ * space.
+ *
+ * For that, ST-Ram may only be allocated while kernel initialization
+ * is going on, or exactly: before mem_init() is called. There is also
+ * no provision now for freeing ST-Ram buffers. It seems that isn't
+ * really needed.
+ *
+ */
+
+/*
+ * New Nov 1997: Use ST-RAM as swap space!
+ *
+ * In the past, there were often problems with modules that require ST-RAM
+ * buffers. Such drivers have to use __get_dma_pages(), which unfortunately
+ * often isn't very successful in allocating more than 1 page :-( [1] The net
+ * result was that most of the time you couldn't insmod such modules (ataflop,
+ * ACSI, SCSI on Falcon, Atari internal framebuffer, not to speak of acsi_slm,
+ * which needs a 1 MB buffer... :-).
+ *
+ * To overcome this limitation, ST-RAM can now be turned into a very
+ * high-speed swap space. If a request for an ST-RAM buffer comes, the kernel
+ * now tries to unswap some pages on that swap device to make some free (and
+ * contiguous) space. This works much better in comparison to
+ * __get_dma_pages(), since used swap pages can be selectively freed by either
+ * moving them to somewhere else in swap space, or by reading them back into
+ * system memory. Ok, there operation of unswapping isn't really cheap (for
+ * each page, one has to go through the page tables of all processes), but it
+ * doesn't happen that often (only when allocation ST-RAM, i.e. when loading a
+ * module that needs ST-RAM). But it at least makes it possible to load such
+ * modules!
+ *
+ * It could also be that overall system performance increases a bit due to
+ * ST-RAM swapping, since slow ST-RAM isn't used anymore for holding data or
+ * executing code in. It's then just a (very fast, compared to disk) back
+ * storage for not-so-often needed data. (But this effect must be compared
+ * with the loss of total memory...) Don't know if the effect is already
+ * visible on a TT, where the speed difference between ST- and TT-RAM isn't
+ * that dramatic, but it should on machines where TT-RAM is really much faster
+ * (e.g. Afterburner).
+ *
+ * [1]: __get_free_pages() does a fine job if you only want one page, but if
+ * you want more (contiguous) pages, it can give you such a block only if
+ * there's already a free one. The algorithm can't try to free buffers or swap
+ * out something in order to make more free space, since all that page-freeing
+ * mechanisms work "target-less", i.e. they just free something, but not in a
+ * specific place. I.e., __get_free_pages() can't do anything to free
+ * *adjacent* pages :-( This situation becomes even worse for DMA memory,
+ * since the freeing algorithms are also blind to DMA capability of pages.
+ */
+
+/* 1998-10-20: ++andreas
+ unswap_by_move disabled because it does not handle swapped shm pages.
+*/
+
+/* 2000-05-01: ++andreas
+ Integrated with bootmem. Remove all traces of unswap_by_move.
+*/
+
+#ifdef CONFIG_STRAM_SWAP
+#define ALIGN_IF_SWAP(x) PAGE_ALIGN(x)
+#else
+#define ALIGN_IF_SWAP(x) (x)
+#endif
+
+/* get index of swap page at address 'addr' */
+#define SWAP_NR(addr) (((addr) - swap_start) >> PAGE_SHIFT)
+
+/* get address of swap page #'nr' */
+#define SWAP_ADDR(nr) (swap_start + ((nr) << PAGE_SHIFT))
+
+/* get number of pages for 'n' bytes (already page-aligned) */
+#define N_PAGES(n) ((n) >> PAGE_SHIFT)
+
+/* The following two numbers define the maximum fraction of ST-RAM in total
+ * memory, below that the kernel would automatically use ST-RAM as swap
+ * space. This decision can be overridden with stram_swap= */
+#define MAX_STRAM_FRACTION_NOM 1
+#define MAX_STRAM_FRACTION_DENOM 3
+
+/* Start and end (virtual) of ST-RAM */
+static void *stram_start, *stram_end;
+
+/* set after memory_init() executed and allocations via start_mem aren't
+ * possible anymore */
+static int mem_init_done;
+
+/* set if kernel is in ST-RAM */
+static int kernel_in_stram;
+
+typedef struct stram_block {
+ struct stram_block *next;
+ void *start;
+ unsigned long size;
+ unsigned flags;
+ const char *owner;
+} BLOCK;
+
+/* values for flags field */
+#define BLOCK_FREE 0x01 /* free structure in the BLOCKs pool */
+#define BLOCK_KMALLOCED 0x02 /* structure allocated by kmalloc() */
+#define BLOCK_GFP 0x08 /* block allocated with __get_dma_pages() */
+#define BLOCK_INSWAP 0x10 /* block allocated in swap space */
+
+/* list of allocated blocks */
+static BLOCK *alloc_list;
+
+/* We can't always use kmalloc() to allocate BLOCK structures, since
+ * stram_alloc() can be called rather early. So we need some pool of
+ * statically allocated structures. 20 of them is more than enough, so in most
+ * cases we never should need to call kmalloc(). */
+#define N_STATIC_BLOCKS 20
+static BLOCK static_blocks[N_STATIC_BLOCKS];
+
+#ifdef CONFIG_STRAM_SWAP
+/* max. number of bytes to use for swapping
+ * 0 = no ST-RAM swapping
+ * -1 = do swapping (to whole ST-RAM) if it's less than MAX_STRAM_FRACTION of
+ * total memory
+ */
+static int max_swap_size = -1;
+
+/* start and end of swapping area */
+static void *swap_start, *swap_end;
+
+/* The ST-RAM's swap info structure */
+static struct swap_info_struct *stram_swap_info;
+
+/* The ST-RAM's swap type */
+static int stram_swap_type;
+
+/* Semaphore for get_stram_region. */
+static DECLARE_MUTEX(stram_swap_sem);
+
+/* major and minor device number of the ST-RAM device; for the major, we use
+ * the same as Amiga z2ram, which is really similar and impossible on Atari,
+ * and for the minor a relatively odd number to avoid the user creating and
+ * using that device. */
+#define STRAM_MAJOR Z2RAM_MAJOR
+#define STRAM_MINOR 13
+
+/* Some impossible pointer value */
+#define MAGIC_FILE_P (struct file *)0xffffdead
+
+#ifdef DO_PROC
+static unsigned stat_swap_read;
+static unsigned stat_swap_write;
+static unsigned stat_swap_force;
+#endif /* DO_PROC */
+
+#endif /* CONFIG_STRAM_SWAP */
+
+/***************************** Prototypes *****************************/
+
+#ifdef CONFIG_STRAM_SWAP
+static int swap_init(void *start_mem, void *swap_data);
+static void *get_stram_region( unsigned long n_pages );
+static void free_stram_region( unsigned long offset, unsigned long n_pages
+ );
+static int in_some_region(void *addr);
+static unsigned long find_free_region( unsigned long n_pages, unsigned long
+ *total_free, unsigned long
+ *region_free );
+static void do_stram_request(request_queue_t *);
+static int stram_open( struct inode *inode, struct file *filp );
+static int stram_release( struct inode *inode, struct file *filp );
+static void reserve_region(void *start, void *end);
+#endif
+static BLOCK *add_region( void *addr, unsigned long size );
+static BLOCK *find_region( void *addr );
+static int remove_region( BLOCK *block );
+
+/************************* End of Prototypes **************************/
+
+
+/* ------------------------------------------------------------------------ */
+/* Public Interface */
+/* ------------------------------------------------------------------------ */
+
+/*
+ * This init function is called very early by atari/config.c
+ * It initializes some internal variables needed for stram_alloc()
+ */
+void __init atari_stram_init(void)
+{
+ int i;
+
+ /* initialize static blocks */
+ for( i = 0; i < N_STATIC_BLOCKS; ++i )
+ static_blocks[i].flags = BLOCK_FREE;
+
+ /* determine whether kernel code resides in ST-RAM (then ST-RAM is the
+ * first memory block at virtual 0x0) */
+ stram_start = phys_to_virt(0);
+ kernel_in_stram = (stram_start == 0);
+
+ for( i = 0; i < m68k_num_memory; ++i ) {
+ if (m68k_memory[i].addr == 0) {
+ /* skip first 2kB or page (supervisor-only!) */
+ stram_end = stram_start + m68k_memory[i].size;
+ return;
+ }
+ }
+ /* Should never come here! (There is always ST-Ram!) */
+ panic( "atari_stram_init: no ST-RAM found!" );
+}
+
+
+/*
+ * This function is called from setup_arch() to reserve the pages needed for
+ * ST-RAM management.
+ */
+void __init atari_stram_reserve_pages(void *start_mem)
+{
+#ifdef CONFIG_STRAM_SWAP
+ /* if max_swap_size is negative (i.e. no stram_swap= option given),
+ * determine at run time whether to use ST-RAM swapping */
+ if (max_swap_size < 0)
+ /* Use swapping if ST-RAM doesn't make up more than MAX_STRAM_FRACTION
+ * of total memory. In that case, the max. size is set to 16 MB,
+ * because ST-RAM can never be bigger than that.
+ * Also, never use swapping on a Hades, there's no separate ST-RAM in
+ * that machine. */
+ max_swap_size =
+ (!MACH_IS_HADES &&
+ (N_PAGES(stram_end-stram_start)*MAX_STRAM_FRACTION_DENOM <=
+ ((unsigned long)high_memory>>PAGE_SHIFT)*MAX_STRAM_FRACTION_NOM)) ? 16*1024*1024 : 0;
+ DPRINTK( "atari_stram_reserve_pages: max_swap_size = %d\n", max_swap_size );
+#endif
+
+ /* always reserve first page of ST-RAM, the first 2 kB are
+ * supervisor-only! */
+ if (!kernel_in_stram)
+ reserve_bootmem (0, PAGE_SIZE);
+
+#ifdef CONFIG_STRAM_SWAP
+ {
+ void *swap_data;
+
+ start_mem = (void *) PAGE_ALIGN ((unsigned long) start_mem);
+ /* determine first page to use as swap: if the kernel is
+ in TT-RAM, this is the first page of (usable) ST-RAM;
+ otherwise just use the end of kernel data (= start_mem) */
+ swap_start = !kernel_in_stram ? stram_start + PAGE_SIZE : start_mem;
+ /* decrement by one page, rest of kernel assumes that first swap page
+ * is always reserved and maybe doesn't handle swp_entry == 0
+ * correctly */
+ swap_start -= PAGE_SIZE;
+ swap_end = stram_end;
+ if (swap_end-swap_start > max_swap_size)
+ swap_end = swap_start + max_swap_size;
+ DPRINTK( "atari_stram_reserve_pages: swapping enabled; "
+ "swap=%p-%p\n", swap_start, swap_end);
+
+ /* reserve some amount of memory for maintainance of
+ * swapping itself: one page for each 2048 (PAGE_SIZE/2)
+ * swap pages. (2 bytes for each page) */
+ swap_data = start_mem;
+ start_mem += ((SWAP_NR(swap_end) + PAGE_SIZE/2 - 1)
+ >> (PAGE_SHIFT-1)) << PAGE_SHIFT;
+ /* correct swap_start if necessary */
+ if (swap_start + PAGE_SIZE == swap_data)
+ swap_start = start_mem - PAGE_SIZE;
+
+ if (!swap_init( start_mem, swap_data )) {
+ printk( KERN_ERR "ST-RAM swap space initialization failed\n" );
+ max_swap_size = 0;
+ return;
+ }
+ /* reserve region for swapping meta-data */
+ reserve_region(swap_data, start_mem);
+ /* reserve swapping area itself */
+ reserve_region(swap_start + PAGE_SIZE, swap_end);
+
+ /*
+ * If the whole ST-RAM is used for swapping, there are no allocatable
+ * dma pages left. But unfortunately, some shared parts of the kernel
+ * (particularly the SCSI mid-level) call __get_dma_pages()
+ * unconditionally :-( These calls then fail, and scsi.c even doesn't
+ * check for NULL return values and just crashes. The quick fix for
+ * this (instead of doing much clean up work in the SCSI code) is to
+ * pretend all pages are DMA-able by setting mach_max_dma_address to
+ * ULONG_MAX. This doesn't change any functionality so far, since
+ * get_dma_pages() shouldn't be used on Atari anyway anymore (better
+ * use atari_stram_alloc()), and the Atari SCSI drivers don't need DMA
+ * memory. But unfortunately there's now no kind of warning (even not
+ * a NULL return value) if you use get_dma_pages() nevertheless :-(
+ * You just will get non-DMA-able memory...
+ */
+ mach_max_dma_address = 0xffffffff;
+ }
+#endif
+}
+
+void atari_stram_mem_init_hook (void)
+{
+ mem_init_done = 1;
+}
+
+
+/*
+ * This is main public interface: somehow allocate a ST-RAM block
+ * There are three strategies:
+ *
+ * - If we're before mem_init(), we have to make a static allocation. The
+ * region is taken in the kernel data area (if the kernel is in ST-RAM) or
+ * from the start of ST-RAM (if the kernel is in TT-RAM) and added to the
+ * rsvd_stram_* region. The ST-RAM is somewhere in the middle of kernel
+ * address space in the latter case.
+ *
+ * - If mem_init() already has been called and ST-RAM swapping is enabled,
+ * try to get the memory from the (pseudo) swap-space, either free already
+ * or by moving some other pages out of the swap.
+ *
+ * - If mem_init() already has been called, and ST-RAM swapping is not
+ * enabled, the only possibility is to try with __get_dma_pages(). This has
+ * the disadvantage that it's very hard to get more than 1 page, and it is
+ * likely to fail :-(
+ *
+ */
+void *atari_stram_alloc(long size, const char *owner)
+{
+ void *addr = NULL;
+ BLOCK *block;
+ int flags;
+
+ DPRINTK("atari_stram_alloc(size=%08lx,owner=%s)\n", size, owner);
+
+ size = ALIGN_IF_SWAP(size);
+ DPRINTK( "atari_stram_alloc: rounded size = %08lx\n", size );
+#ifdef CONFIG_STRAM_SWAP
+ if (max_swap_size) {
+ /* If swapping is active: make some free space in the swap
+ "device". */
+ DPRINTK( "atari_stram_alloc: after mem_init, swapping ok, "
+ "calling get_region\n" );
+ addr = get_stram_region( N_PAGES(size) );
+ flags = BLOCK_INSWAP;
+ }
+ else
+#endif
+ if (!mem_init_done)
+ return alloc_bootmem_low(size);
+ else {
+ /* After mem_init() and no swapping: can only resort to
+ * __get_dma_pages() */
+ addr = (void *)__get_dma_pages(GFP_KERNEL, get_order(size));
+ flags = BLOCK_GFP;
+ DPRINTK( "atari_stram_alloc: after mem_init, swapping off, "
+ "get_pages=%p\n", addr );
+ }
+
+ if (addr) {
+ if (!(block = add_region( addr, size ))) {
+ /* out of memory for BLOCK structure :-( */
+ DPRINTK( "atari_stram_alloc: out of mem for BLOCK -- "
+ "freeing again\n" );
+#ifdef CONFIG_STRAM_SWAP
+ if (flags == BLOCK_INSWAP)
+ free_stram_region( SWAP_NR(addr), N_PAGES(size) );
+ else
+#endif
+ free_pages((unsigned long)addr, get_order(size));
+ return( NULL );
+ }
+ block->owner = owner;
+ block->flags |= flags;
+ }
+ return( addr );
+}
+
+void atari_stram_free( void *addr )
+
+{
+ BLOCK *block;
+
+ DPRINTK( "atari_stram_free(addr=%p)\n", addr );
+
+ if (!(block = find_region( addr ))) {
+ printk( KERN_ERR "Attempt to free non-allocated ST-RAM block at %p "
+ "from %p\n", addr, __builtin_return_address(0) );
+ return;
+ }
+ DPRINTK( "atari_stram_free: found block (%p): size=%08lx, owner=%s, "
+ "flags=%02x\n", block, block->size, block->owner, block->flags );
+
+#ifdef CONFIG_STRAM_SWAP
+ if (!max_swap_size) {
+#endif
+ if (block->flags & BLOCK_GFP) {
+ DPRINTK("atari_stram_free: is kmalloced, order_size=%d\n",
+ get_order(block->size));
+ free_pages((unsigned long)addr, get_order(block->size));
+ }
+ else
+ goto fail;
+#ifdef CONFIG_STRAM_SWAP
+ }
+ else if (block->flags & BLOCK_INSWAP) {
+ DPRINTK( "atari_stram_free: is swap-alloced\n" );
+ free_stram_region( SWAP_NR(block->start), N_PAGES(block->size) );
+ }
+ else
+ goto fail;
+#endif
+ remove_region( block );
+ return;
+
+ fail:
+ printk( KERN_ERR "atari_stram_free: cannot free block at %p "
+ "(called from %p)\n", addr, __builtin_return_address(0) );
+}
+
+
+#ifdef CONFIG_STRAM_SWAP
+
+
+/* ------------------------------------------------------------------------ */
+/* Main Swapping Functions */
+/* ------------------------------------------------------------------------ */
+
+
+/*
+ * Initialize ST-RAM swap device
+ * (lots copied and modified from sys_swapon() in mm/swapfile.c)
+ */
+static int __init swap_init(void *start_mem, void *swap_data)
+{
+ static struct dentry fake_dentry;
+ static struct vfsmount fake_vfsmnt;
+ struct swap_info_struct *p;
+ struct inode swap_inode;
+ unsigned int type;
+ void *addr;
+ int i, j, k, prev;
+
+ DPRINTK("swap_init(start_mem=%p, swap_data=%p)\n",
+ start_mem, swap_data);
+
+ /* need at least one page for swapping to (and this also isn't very
+ * much... :-) */
+ if (swap_end - swap_start < 2*PAGE_SIZE) {
+ printk( KERN_WARNING "stram_swap_init: swap space too small\n" );
+ return( 0 );
+ }
+
+ /* find free slot in swap_info */
+ for( p = swap_info, type = 0; type < nr_swapfiles; type++, p++ )
+ if (!(p->flags & SWP_USED))
+ break;
+ if (type >= MAX_SWAPFILES) {
+ printk( KERN_WARNING "stram_swap_init: max. number of "
+ "swap devices exhausted\n" );
+ return( 0 );
+ }
+ if (type >= nr_swapfiles)
+ nr_swapfiles = type+1;
+
+ stram_swap_info = p;
+ stram_swap_type = type;
+
+ /* fake some dir cache entries to give us some name in /dev/swaps */
+ fake_dentry.d_parent = &fake_dentry;
+ fake_dentry.d_name.name = "stram (internal)";
+ fake_dentry.d_name.len = 16;
+ fake_vfsmnt.mnt_parent = &fake_vfsmnt;
+
+ p->flags = SWP_USED;
+ p->swap_file = &fake_dentry;
+ p->swap_vfsmnt = &fake_vfsmnt;
+ p->swap_map = swap_data;
+ p->cluster_nr = 0;
+ p->next = -1;
+ p->prio = 0x7ff0; /* a rather high priority, but not the higest
+ * to give the user a chance to override */
+
+ /* call stram_open() directly, avoids at least the overhead in
+ * constructing a dummy file structure... */
+ swap_inode.i_rdev = MKDEV( STRAM_MAJOR, STRAM_MINOR );
+ stram_open( &swap_inode, MAGIC_FILE_P );
+ p->max = SWAP_NR(swap_end);
+
+ /* initialize swap_map: set regions that are already allocated or belong
+ * to kernel data space to SWAP_MAP_BAD, otherwise to free */
+ j = 0; /* # of free pages */
+ k = 0; /* # of already allocated pages (from pre-mem_init stram_alloc()) */
+ p->lowest_bit = 0;
+ p->highest_bit = 0;
+ for( i = 1, addr = SWAP_ADDR(1); i < p->max;
+ i++, addr += PAGE_SIZE ) {
+ if (in_some_region( addr )) {
+ p->swap_map[i] = SWAP_MAP_BAD;
+ ++k;
+ }
+ else if (kernel_in_stram && addr < start_mem ) {
+ p->swap_map[i] = SWAP_MAP_BAD;
+ }
+ else {
+ p->swap_map[i] = 0;
+ ++j;
+ if (!p->lowest_bit) p->lowest_bit = i;
+ p->highest_bit = i;
+ }
+ }
+ /* first page always reserved (and doesn't really belong to swap space) */
+ p->swap_map[0] = SWAP_MAP_BAD;
+
+ /* now swapping to this device ok */
+ p->pages = j + k;
+ swap_list_lock();
+ nr_swap_pages += j;
+ p->flags = SWP_WRITEOK;
+
+ /* insert swap space into swap_list */
+ prev = -1;
+ for (i = swap_list.head; i >= 0; i = swap_info[i].next) {
+ if (p->prio >= swap_info[i].prio) {
+ break;
+ }
+ prev = i;
+ }
+ p->next = i;
+ if (prev < 0) {
+ swap_list.head = swap_list.next = p - swap_info;
+ } else {
+ swap_info[prev].next = p - swap_info;
+ }
+ swap_list_unlock();
+
+ printk( KERN_INFO "Using %dk (%d pages) of ST-RAM as swap space.\n",
+ p->pages << 2, p->pages );
+ return( 1 );
+}
+
+
+/*
+ * The swap entry has been read in advance, and we return 1 to indicate
+ * that the page has been used or is no longer needed.
+ *
+ * Always set the resulting pte to be nowrite (the same as COW pages
+ * after one process has exited). We don't know just how many PTEs will
+ * share this swap entry, so be cautious and let do_wp_page work out
+ * what to do if a write is requested later.
+ */
+static inline void unswap_pte(struct vm_area_struct * vma, unsigned long
+ address, pte_t *dir, swp_entry_t entry,
+ struct page *page)
+{
+ pte_t pte = *dir;
+
+ if (pte_none(pte))
+ return;
+ if (pte_present(pte)) {
+ /* If this entry is swap-cached, then page must already
+ hold the right address for any copies in physical
+ memory */
+ if (pte_page(pte) != page)
+ return;
+ /* We will be removing the swap cache in a moment, so... */
+ set_pte(dir, pte_mkdirty(pte));
+ return;
+ }
+ if (pte_val(pte) != entry.val)
+ return;
+
+ DPRINTK("unswap_pte: replacing entry %08lx by new page %p",
+ entry.val, page);
+ set_pte(dir, pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
+ swap_free(entry);
+ get_page(page);
+ inc_mm_counter(vma->vm_mm, rss);
+}
+
+static inline void unswap_pmd(struct vm_area_struct * vma, pmd_t *dir,
+ unsigned long address, unsigned long size,
+ unsigned long offset, swp_entry_t entry,
+ struct page *page)
+{
+ pte_t * pte;
+ unsigned long end;
+
+ if (pmd_none(*dir))
+ return;
+ if (pmd_bad(*dir)) {
+ pmd_ERROR(*dir);
+ pmd_clear(dir);
+ return;
+ }
+ pte = pte_offset_kernel(dir, address);
+ offset += address & PMD_MASK;
+ address &= ~PMD_MASK;
+ end = address + size;
+ if (end > PMD_SIZE)
+ end = PMD_SIZE;
+ do {
+ unswap_pte(vma, offset+address-vma->vm_start, pte, entry, page);
+ address += PAGE_SIZE;
+ pte++;
+ } while (address < end);
+}
+
+static inline void unswap_pgd(struct vm_area_struct * vma, pgd_t *dir,
+ unsigned long address, unsigned long size,
+ swp_entry_t entry, struct page *page)
+{
+ pmd_t * pmd;
+ unsigned long offset, end;
+
+ if (pgd_none(*dir))
+ return;
+ if (pgd_bad(*dir)) {
+ pgd_ERROR(*dir);
+ pgd_clear(dir);
+ return;
+ }
+ pmd = pmd_offset(dir, address);
+ offset = address & PGDIR_MASK;
+ address &= ~PGDIR_MASK;
+ end = address + size;
+ if (end > PGDIR_SIZE)
+ end = PGDIR_SIZE;
+ do {
+ unswap_pmd(vma, pmd, address, end - address, offset, entry,
+ page);
+ address = (address + PMD_SIZE) & PMD_MASK;
+ pmd++;
+ } while (address < end);
+}
+
+static void unswap_vma(struct vm_area_struct * vma, pgd_t *pgdir,
+ swp_entry_t entry, struct page *page)
+{
+ unsigned long start = vma->vm_start, end = vma->vm_end;
+
+ do {
+ unswap_pgd(vma, pgdir, start, end - start, entry, page);
+ start = (start + PGDIR_SIZE) & PGDIR_MASK;
+ pgdir++;
+ } while (start < end);
+}
+
+static void unswap_process(struct mm_struct * mm, swp_entry_t entry,
+ struct page *page)
+{
+ struct vm_area_struct* vma;
+
+ /*
+ * Go through process' page directory.
+ */
+ if (!mm)
+ return;
+ for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ pgd_t * pgd = pgd_offset(mm, vma->vm_start);
+ unswap_vma(vma, pgd, entry, page);
+ }
+}
+
+
+static int unswap_by_read(unsigned short *map, unsigned long max,
+ unsigned long start, unsigned long n_pages)
+{
+ struct task_struct *p;
+ struct page *page;
+ swp_entry_t entry;
+ unsigned long i;
+
+ DPRINTK( "unswapping %lu..%lu by reading in\n",
+ start, start+n_pages-1 );
+
+ for( i = start; i < start+n_pages; ++i ) {
+ if (map[i] == SWAP_MAP_BAD) {
+ printk( KERN_ERR "get_stram_region: page %lu already "
+ "reserved??\n", i );
+ continue;
+ }
+
+ if (map[i]) {
+ entry = swp_entry(stram_swap_type, i);
+ DPRINTK("unswap: map[i=%lu]=%u nr_swap=%ld\n",
+ i, map[i], nr_swap_pages);
+
+ swap_device_lock(stram_swap_info);
+ map[i]++;
+ swap_device_unlock(stram_swap_info);
+ /* Get a page for the entry, using the existing
+ swap cache page if there is one. Otherwise,
+ get a clean page and read the swap into it. */
+ page = read_swap_cache_async(entry, NULL, 0);
+ if (!page) {
+ swap_free(entry);
+ return -ENOMEM;
+ }
+ read_lock(&tasklist_lock);
+ for_each_process(p)
+ unswap_process(p->mm, entry, page);
+ read_unlock(&tasklist_lock);
+ shmem_unuse(entry, page);
+ /* Now get rid of the extra reference to the
+ temporary page we've been using. */
+ if (PageSwapCache(page))
+ delete_from_swap_cache(page);
+ __free_page(page);
+ #ifdef DO_PROC
+ stat_swap_force++;
+ #endif
+ }
+
+ DPRINTK( "unswap: map[i=%lu]=%u nr_swap=%ld\n",
+ i, map[i], nr_swap_pages );
+ swap_list_lock();
+ swap_device_lock(stram_swap_info);
+ map[i] = SWAP_MAP_BAD;
+ if (stram_swap_info->lowest_bit == i)
+ stram_swap_info->lowest_bit++;
+ if (stram_swap_info->highest_bit == i)
+ stram_swap_info->highest_bit--;
+ --nr_swap_pages;
+ swap_device_unlock(stram_swap_info);
+ swap_list_unlock();
+ }
+
+ return 0;
+}
+
+/*
+ * reserve a region in ST-RAM swap space for an allocation
+ */
+static void *get_stram_region( unsigned long n_pages )
+{
+ unsigned short *map = stram_swap_info->swap_map;
+ unsigned long max = stram_swap_info->max;
+ unsigned long start, total_free, region_free;
+ int err;
+ void *ret = NULL;
+
+ DPRINTK( "get_stram_region(n_pages=%lu)\n", n_pages );
+
+ down(&stram_swap_sem);
+
+ /* disallow writing to the swap device now */
+ stram_swap_info->flags = SWP_USED;
+
+ /* find a region of n_pages pages in the swap space including as much free
+ * pages as possible (and excluding any already-reserved pages). */
+ if (!(start = find_free_region( n_pages, &total_free, ®ion_free )))
+ goto end;
+ DPRINTK( "get_stram_region: region starts at %lu, has %lu free pages\n",
+ start, region_free );
+
+ err = unswap_by_read(map, max, start, n_pages);
+ if (err)
+ goto end;
+
+ ret = SWAP_ADDR(start);
+ end:
+ /* allow using swap device again */
+ stram_swap_info->flags = SWP_WRITEOK;
+ up(&stram_swap_sem);
+ DPRINTK( "get_stram_region: returning %p\n", ret );
+ return( ret );
+}
+
+
+/*
+ * free a reserved region in ST-RAM swap space
+ */
+static void free_stram_region( unsigned long offset, unsigned long n_pages )
+{
+ unsigned short *map = stram_swap_info->swap_map;
+
+ DPRINTK( "free_stram_region(offset=%lu,n_pages=%lu)\n", offset, n_pages );
+
+ if (offset < 1 || offset + n_pages > stram_swap_info->max) {
+ printk( KERN_ERR "free_stram_region: Trying to free non-ST-RAM\n" );
+ return;
+ }
+
+ swap_list_lock();
+ swap_device_lock(stram_swap_info);
+ /* un-reserve the freed pages */
+ for( ; n_pages > 0; ++offset, --n_pages ) {
+ if (map[offset] != SWAP_MAP_BAD)
+ printk( KERN_ERR "free_stram_region: Swap page %lu was not "
+ "reserved\n", offset );
+ map[offset] = 0;
+ }
+
+ /* update swapping meta-data */
+ if (offset < stram_swap_info->lowest_bit)
+ stram_swap_info->lowest_bit = offset;
+ if (offset+n_pages-1 > stram_swap_info->highest_bit)
+ stram_swap_info->highest_bit = offset+n_pages-1;
+ if (stram_swap_info->prio > swap_info[swap_list.next].prio)
+ swap_list.next = swap_list.head;
+ nr_swap_pages += n_pages;
+ swap_device_unlock(stram_swap_info);
+ swap_list_unlock();
+}
+
+
+/* ------------------------------------------------------------------------ */
+/* Utility Functions for Swapping */
+/* ------------------------------------------------------------------------ */
+
+
+/* is addr in some of the allocated regions? */
+static int in_some_region(void *addr)
+{
+ BLOCK *p;
+
+ for( p = alloc_list; p; p = p->next ) {
+ if (p->start <= addr && addr < p->start + p->size)
+ return( 1 );
+ }
+ return( 0 );
+}
+
+
+static unsigned long find_free_region(unsigned long n_pages,
+ unsigned long *total_free,
+ unsigned long *region_free)
+{
+ unsigned short *map = stram_swap_info->swap_map;
+ unsigned long max = stram_swap_info->max;
+ unsigned long head, tail, max_start;
+ long nfree, max_free;
+
+ /* first scan the swap space for a suitable place for the allocation */
+ head = 1;
+ max_start = 0;
+ max_free = -1;
+ *total_free = 0;
+
+ start_over:
+ /* increment tail until final window size reached, and count free pages */
+ nfree = 0;
+ for( tail = head; tail-head < n_pages && tail < max; ++tail ) {
+ if (map[tail] == SWAP_MAP_BAD) {
+ head = tail+1;
+ goto start_over;
+ }
+ if (!map[tail]) {
+ ++nfree;
+ ++*total_free;
+ }
+ }
+ if (tail-head < n_pages)
+ goto out;
+ if (nfree > max_free) {
+ max_start = head;
+ max_free = nfree;
+ if (max_free >= n_pages)
+ /* don't need more free pages... :-) */
+ goto out;
+ }
+
+ /* now shift the window and look for the area where as much pages as
+ * possible are free */
+ while( tail < max ) {
+ nfree -= (map[head++] == 0);
+ if (map[tail] == SWAP_MAP_BAD) {
+ head = tail+1;
+ goto start_over;
+ }
+ if (!map[tail]) {
+ ++nfree;
+ ++*total_free;
+ }
+ ++tail;
+ if (nfree > max_free) {
+ max_start = head;
+ max_free = nfree;
+ if (max_free >= n_pages)
+ /* don't need more free pages... :-) */
+ goto out;
+ }
+ }
+
+ out:
+ if (max_free < 0) {
+ printk( KERN_NOTICE "get_stram_region: ST-RAM too full or fragmented "
+ "-- can't allocate %lu pages\n", n_pages );
+ return( 0 );
+ }
+
+ *region_free = max_free;
+ return( max_start );
+}
+
+
+/* setup parameters from command line */
+void __init stram_swap_setup(char *str, int *ints)
+{
+ if (ints[0] >= 1)
+ max_swap_size = ((ints[1] < 0 ? 0 : ints[1]) * 1024) & PAGE_MASK;
+}
+
+
+/* ------------------------------------------------------------------------ */
+/* ST-RAM device */
+/* ------------------------------------------------------------------------ */
+
+static int refcnt;
+
+static void do_stram_request(request_queue_t *q)
+{
+ struct request *req;
+
+ while ((req = elv_next_request(q)) != NULL) {
+ void *start = swap_start + (req->sector << 9);
+ unsigned long len = req->current_nr_sectors << 9;
+ if ((start + len) > swap_end) {
+ printk( KERN_ERR "stram: bad access beyond end of device: "
+ "block=%ld, count=%d\n",
+ req->sector,
+ req->current_nr_sectors );
+ end_request(req, 0);
+ continue;
+ }
+
+ if (req->cmd == READ) {
+ memcpy(req->buffer, start, len);
+#ifdef DO_PROC
+ stat_swap_read += N_PAGES(len);
+#endif
+ }
+ else {
+ memcpy(start, req->buffer, len);
+#ifdef DO_PROC
+ stat_swap_write += N_PAGES(len);
+#endif
+ }
+ end_request(req, 1);
+ }
+}
+
+
+static int stram_open( struct inode *inode, struct file *filp )
+{
+ if (filp != MAGIC_FILE_P) {
+ printk( KERN_NOTICE "Only kernel can open ST-RAM device\n" );
+ return( -EPERM );
+ }
+ if (refcnt)
+ return( -EBUSY );
+ ++refcnt;
+ return( 0 );
+}
+
+static int stram_release( struct inode *inode, struct file *filp )
+{
+ if (filp != MAGIC_FILE_P) {
+ printk( KERN_NOTICE "Only kernel can close ST-RAM device\n" );
+ return( -EPERM );
+ }
+ if (refcnt > 0)
+ --refcnt;
+ return( 0 );
+}
+
+
+static struct block_device_operations stram_fops = {
+ .open = stram_open,
+ .release = stram_release,
+};
+
+static struct gendisk *stram_disk;
+static struct request_queue *stram_queue;
+static DEFINE_SPINLOCK(stram_lock);
+
+int __init stram_device_init(void)
+{
+ if (!MACH_IS_ATARI)
+ /* no point in initializing this, I hope */
+ return -ENXIO;
+
+ if (!max_swap_size)
+ /* swapping not enabled */
+ return -ENXIO;
+ stram_disk = alloc_disk(1);
+ if (!stram_disk)
+ return -ENOMEM;
+
+ if (register_blkdev(STRAM_MAJOR, "stram")) {
+ put_disk(stram_disk);
+ return -ENXIO;
+ }
+
+ stram_queue = blk_init_queue(do_stram_request, &stram_lock);
+ if (!stram_queue) {
+ unregister_blkdev(STRAM_MAJOR, "stram");
+ put_disk(stram_disk);
+ return -ENOMEM;
+ }
+
+ stram_disk->major = STRAM_MAJOR;
+ stram_disk->first_minor = STRAM_MINOR;
+ stram_disk->fops = &stram_fops;
+ stram_disk->queue = stram_queue;
+ sprintf(stram_disk->disk_name, "stram");
+ set_capacity(stram_disk, (swap_end - swap_start)/512);
+ add_disk(stram_disk);
+ return 0;
+}
+
+
+
+/* ------------------------------------------------------------------------ */
+/* Misc Utility Functions */
+/* ------------------------------------------------------------------------ */
+
+/* reserve a range of pages */
+static void reserve_region(void *start, void *end)
+{
+ reserve_bootmem (virt_to_phys(start), end - start);
+}
+
+#endif /* CONFIG_STRAM_SWAP */
+
+
+/* ------------------------------------------------------------------------ */
+/* Region Management */
+/* ------------------------------------------------------------------------ */
+
+
+/* insert a region into the alloced list (sorted) */
+static BLOCK *add_region( void *addr, unsigned long size )
+{
+ BLOCK **p, *n = NULL;
+ int i;
+
+ for( i = 0; i < N_STATIC_BLOCKS; ++i ) {
+ if (static_blocks[i].flags & BLOCK_FREE) {
+ n = &static_blocks[i];
+ n->flags = 0;
+ break;
+ }
+ }
+ if (!n && mem_init_done) {
+ /* if statics block pool exhausted and we can call kmalloc() already
+ * (after mem_init()), try that */
+ n = kmalloc( sizeof(BLOCK), GFP_KERNEL );
+ if (n)
+ n->flags = BLOCK_KMALLOCED;
+ }
+ if (!n) {
+ printk( KERN_ERR "Out of memory for ST-RAM descriptor blocks\n" );
+ return( NULL );
+ }
+ n->start = addr;
+ n->size = size;
+
+ for( p = &alloc_list; *p; p = &((*p)->next) )
+ if ((*p)->start > addr) break;
+ n->next = *p;
+ *p = n;
+
+ return( n );
+}
+
+
+/* find a region (by start addr) in the alloced list */
+static BLOCK *find_region( void *addr )
+{
+ BLOCK *p;
+
+ for( p = alloc_list; p; p = p->next ) {
+ if (p->start == addr)
+ return( p );
+ if (p->start > addr)
+ break;
+ }
+ return( NULL );
+}
+
+
+/* remove a block from the alloced list */
+static int remove_region( BLOCK *block )
+{
+ BLOCK **p;
+
+ for( p = &alloc_list; *p; p = &((*p)->next) )
+ if (*p == block) break;
+ if (!*p)
+ return( 0 );
+
+ *p = block->next;
+ if (block->flags & BLOCK_KMALLOCED)
+ kfree( block );
+ else
+ block->flags |= BLOCK_FREE;
+ return( 1 );
+}
+
+
+
+/* ------------------------------------------------------------------------ */
+/* /proc statistics file stuff */
+/* ------------------------------------------------------------------------ */
+
+#ifdef DO_PROC
+
+#define PRINT_PROC(fmt,args...) len += sprintf( buf+len, fmt, ##args )
+
+int get_stram_list( char *buf )
+{
+ int len = 0;
+ BLOCK *p;
+#ifdef CONFIG_STRAM_SWAP
+ int i;
+ unsigned short *map = stram_swap_info->swap_map;
+ unsigned long max = stram_swap_info->max;
+ unsigned free = 0, used = 0, rsvd = 0;
+#endif
+
+#ifdef CONFIG_STRAM_SWAP
+ if (max_swap_size) {
+ for( i = 1; i < max; ++i ) {
+ if (!map[i])
+ ++free;
+ else if (map[i] == SWAP_MAP_BAD)
+ ++rsvd;
+ else
+ ++used;
+ }
+ PRINT_PROC(
+ "Total ST-RAM: %8u kB\n"
+ "Total ST-RAM swap: %8lu kB\n"
+ "Free swap: %8u kB\n"
+ "Used swap: %8u kB\n"
+ "Allocated swap: %8u kB\n"
+ "Swap Reads: %8u\n"
+ "Swap Writes: %8u\n"
+ "Swap Forced Reads: %8u\n",
+ (stram_end - stram_start) >> 10,
+ (max-1) << (PAGE_SHIFT-10),
+ free << (PAGE_SHIFT-10),
+ used << (PAGE_SHIFT-10),
+ rsvd << (PAGE_SHIFT-10),
+ stat_swap_read,
+ stat_swap_write,
+ stat_swap_force );
+ }
+ else {
+#endif
+ PRINT_PROC( "ST-RAM swapping disabled\n" );
+ PRINT_PROC("Total ST-RAM: %8u kB\n",
+ (stram_end - stram_start) >> 10);
+#ifdef CONFIG_STRAM_SWAP
+ }
+#endif
+
+ PRINT_PROC( "Allocated regions:\n" );
+ for( p = alloc_list; p; p = p->next ) {
+ if (len + 50 >= PAGE_SIZE)
+ break;
+ PRINT_PROC("0x%08lx-0x%08lx: %s (",
+ virt_to_phys(p->start),
+ virt_to_phys(p->start+p->size-1),
+ p->owner);
+ if (p->flags & BLOCK_GFP)
+ PRINT_PROC( "page-alloced)\n" );
+ else if (p->flags & BLOCK_INSWAP)
+ PRINT_PROC( "in swap)\n" );
+ else
+ PRINT_PROC( "??)\n" );
+ }
+
+ return( len );
+}
+
+#endif
+
+
+/*
+ * Local variables:
+ * c-indent-level: 4
+ * tab-width: 4
+ * End:
+ */
diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c
new file mode 100644
index 0000000..6df7fb6
--- /dev/null
+++ b/arch/m68k/atari/time.c
@@ -0,0 +1,348 @@
+/*
+ * linux/arch/m68k/atari/time.c
+ *
+ * Atari time and real time clock stuff
+ *
+ * Assembled of parts of former atari/config.c 97-12-18 by Roman Hodek
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/types.h>
+#include <linux/mc146818rtc.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+
+#include <asm/atariints.h>
+
+void __init
+atari_sched_init(irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
+{
+ /* set Timer C data Register */
+ mfp.tim_dt_c = INT_TICKS;
+ /* start timer C, div = 1:100 */
+ mfp.tim_ct_cd = (mfp.tim_ct_cd & 15) | 0x60;
+ /* install interrupt service routine for MFP Timer C */
+ request_irq(IRQ_MFP_TIMC, timer_routine, IRQ_TYPE_SLOW,
+ "timer", timer_routine);
+}
+
+/* ++andreas: gettimeoffset fixed to check for pending interrupt */
+
+#define TICK_SIZE 10000
+
+/* This is always executed with interrupts disabled. */
+unsigned long atari_gettimeoffset (void)
+{
+ unsigned long ticks, offset = 0;
+
+ /* read MFP timer C current value */
+ ticks = mfp.tim_dt_c;
+ /* The probability of underflow is less than 2% */
+ if (ticks > INT_TICKS - INT_TICKS / 50)
+ /* Check for pending timer interrupt */
+ if (mfp.int_pn_b & (1 << 5))
+ offset = TICK_SIZE;
+
+ ticks = INT_TICKS - ticks;
+ ticks = ticks * 10000L / INT_TICKS;
+
+ return ticks + offset;
+}
+
+
+static void mste_read(struct MSTE_RTC *val)
+{
+#define COPY(v) val->v=(mste_rtc.v & 0xf)
+ do {
+ COPY(sec_ones) ; COPY(sec_tens) ; COPY(min_ones) ;
+ COPY(min_tens) ; COPY(hr_ones) ; COPY(hr_tens) ;
+ COPY(weekday) ; COPY(day_ones) ; COPY(day_tens) ;
+ COPY(mon_ones) ; COPY(mon_tens) ; COPY(year_ones) ;
+ COPY(year_tens) ;
+ /* prevent from reading the clock while it changed */
+ } while (val->sec_ones != (mste_rtc.sec_ones & 0xf));
+#undef COPY
+}
+
+static void mste_write(struct MSTE_RTC *val)
+{
+#define COPY(v) mste_rtc.v=val->v
+ do {
+ COPY(sec_ones) ; COPY(sec_tens) ; COPY(min_ones) ;
+ COPY(min_tens) ; COPY(hr_ones) ; COPY(hr_tens) ;
+ COPY(weekday) ; COPY(day_ones) ; COPY(day_tens) ;
+ COPY(mon_ones) ; COPY(mon_tens) ; COPY(year_ones) ;
+ COPY(year_tens) ;
+ /* prevent from writing the clock while it changed */
+ } while (val->sec_ones != (mste_rtc.sec_ones & 0xf));
+#undef COPY
+}
+
+#define RTC_READ(reg) \
+ ({ unsigned char __val; \
+ (void) atari_writeb(reg,&tt_rtc.regsel); \
+ __val = tt_rtc.data; \
+ __val; \
+ })
+
+#define RTC_WRITE(reg,val) \
+ do { \
+ atari_writeb(reg,&tt_rtc.regsel); \
+ tt_rtc.data = (val); \
+ } while(0)
+
+
+#define HWCLK_POLL_INTERVAL 5
+
+int atari_mste_hwclk( int op, struct rtc_time *t )
+{
+ int hour, year;
+ int hr24=0;
+ struct MSTE_RTC val;
+
+ mste_rtc.mode=(mste_rtc.mode | 1);
+ hr24=mste_rtc.mon_tens & 1;
+ mste_rtc.mode=(mste_rtc.mode & ~1);
+
+ if (op) {
+ /* write: prepare values */
+
+ val.sec_ones = t->tm_sec % 10;
+ val.sec_tens = t->tm_sec / 10;
+ val.min_ones = t->tm_min % 10;
+ val.min_tens = t->tm_min / 10;
+ hour = t->tm_hour;
+ if (!hr24) {
+ if (hour > 11)
+ hour += 20 - 12;
+ if (hour == 0 || hour == 20)
+ hour += 12;
+ }
+ val.hr_ones = hour % 10;
+ val.hr_tens = hour / 10;
+ val.day_ones = t->tm_mday % 10;
+ val.day_tens = t->tm_mday / 10;
+ val.mon_ones = (t->tm_mon+1) % 10;
+ val.mon_tens = (t->tm_mon+1) / 10;
+ year = t->tm_year - 80;
+ val.year_ones = year % 10;
+ val.year_tens = year / 10;
+ val.weekday = t->tm_wday;
+ mste_write(&val);
+ mste_rtc.mode=(mste_rtc.mode | 1);
+ val.year_ones = (year % 4); /* leap year register */
+ mste_rtc.mode=(mste_rtc.mode & ~1);
+ }
+ else {
+ mste_read(&val);
+ t->tm_sec = val.sec_ones + val.sec_tens * 10;
+ t->tm_min = val.min_ones + val.min_tens * 10;
+ hour = val.hr_ones + val.hr_tens * 10;
+ if (!hr24) {
+ if (hour == 12 || hour == 12 + 20)
+ hour -= 12;
+ if (hour >= 20)
+ hour += 12 - 20;
+ }
+ t->tm_hour = hour;
+ t->tm_mday = val.day_ones + val.day_tens * 10;
+ t->tm_mon = val.mon_ones + val.mon_tens * 10 - 1;
+ t->tm_year = val.year_ones + val.year_tens * 10 + 80;
+ t->tm_wday = val.weekday;
+ }
+ return 0;
+}
+
+int atari_tt_hwclk( int op, struct rtc_time *t )
+{
+ int sec=0, min=0, hour=0, day=0, mon=0, year=0, wday=0;
+ unsigned long flags;
+ unsigned char ctrl;
+ int pm = 0;
+
+ ctrl = RTC_READ(RTC_CONTROL); /* control registers are
+ * independent from the UIP */
+
+ if (op) {
+ /* write: prepare values */
+
+ sec = t->tm_sec;
+ min = t->tm_min;
+ hour = t->tm_hour;
+ day = t->tm_mday;
+ mon = t->tm_mon + 1;
+ year = t->tm_year - atari_rtc_year_offset;
+ wday = t->tm_wday + (t->tm_wday >= 0);
+
+ if (!(ctrl & RTC_24H)) {
+ if (hour > 11) {
+ pm = 0x80;
+ if (hour != 12)
+ hour -= 12;
+ }
+ else if (hour == 0)
+ hour = 12;
+ }
+
+ if (!(ctrl & RTC_DM_BINARY)) {
+ BIN_TO_BCD(sec);
+ BIN_TO_BCD(min);
+ BIN_TO_BCD(hour);
+ BIN_TO_BCD(day);
+ BIN_TO_BCD(mon);
+ BIN_TO_BCD(year);
+ if (wday >= 0) BIN_TO_BCD(wday);
+ }
+ }
+
+ /* Reading/writing the clock registers is a bit critical due to
+ * the regular update cycle of the RTC. While an update is in
+ * progress, registers 0..9 shouldn't be touched.
+ * The problem is solved like that: If an update is currently in
+ * progress (the UIP bit is set), the process sleeps for a while
+ * (50ms). This really should be enough, since the update cycle
+ * normally needs 2 ms.
+ * If the UIP bit reads as 0, we have at least 244 usecs until the
+ * update starts. This should be enough... But to be sure,
+ * additionally the RTC_SET bit is set to prevent an update cycle.
+ */
+
+ while( RTC_READ(RTC_FREQ_SELECT) & RTC_UIP ) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(HWCLK_POLL_INTERVAL);
+ }
+
+ local_irq_save(flags);
+ RTC_WRITE( RTC_CONTROL, ctrl | RTC_SET );
+ if (!op) {
+ sec = RTC_READ( RTC_SECONDS );
+ min = RTC_READ( RTC_MINUTES );
+ hour = RTC_READ( RTC_HOURS );
+ day = RTC_READ( RTC_DAY_OF_MONTH );
+ mon = RTC_READ( RTC_MONTH );
+ year = RTC_READ( RTC_YEAR );
+ wday = RTC_READ( RTC_DAY_OF_WEEK );
+ }
+ else {
+ RTC_WRITE( RTC_SECONDS, sec );
+ RTC_WRITE( RTC_MINUTES, min );
+ RTC_WRITE( RTC_HOURS, hour + pm);
+ RTC_WRITE( RTC_DAY_OF_MONTH, day );
+ RTC_WRITE( RTC_MONTH, mon );
+ RTC_WRITE( RTC_YEAR, year );
+ if (wday >= 0) RTC_WRITE( RTC_DAY_OF_WEEK, wday );
+ }
+ RTC_WRITE( RTC_CONTROL, ctrl & ~RTC_SET );
+ local_irq_restore(flags);
+
+ if (!op) {
+ /* read: adjust values */
+
+ if (hour & 0x80) {
+ hour &= ~0x80;
+ pm = 1;
+ }
+
+ if (!(ctrl & RTC_DM_BINARY)) {
+ BCD_TO_BIN(sec);
+ BCD_TO_BIN(min);
+ BCD_TO_BIN(hour);
+ BCD_TO_BIN(day);
+ BCD_TO_BIN(mon);
+ BCD_TO_BIN(year);
+ BCD_TO_BIN(wday);
+ }
+
+ if (!(ctrl & RTC_24H)) {
+ if (!pm && hour == 12)
+ hour = 0;
+ else if (pm && hour != 12)
+ hour += 12;
+ }
+
+ t->tm_sec = sec;
+ t->tm_min = min;
+ t->tm_hour = hour;
+ t->tm_mday = day;
+ t->tm_mon = mon - 1;
+ t->tm_year = year + atari_rtc_year_offset;
+ t->tm_wday = wday - 1;
+ }
+
+ return( 0 );
+}
+
+
+int atari_mste_set_clock_mmss (unsigned long nowtime)
+{
+ short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
+ struct MSTE_RTC val;
+ unsigned char rtc_minutes;
+
+ mste_read(&val);
+ rtc_minutes= val.min_ones + val.min_tens * 10;
+ if ((rtc_minutes < real_minutes
+ ? real_minutes - rtc_minutes
+ : rtc_minutes - real_minutes) < 30)
+ {
+ val.sec_ones = real_seconds % 10;
+ val.sec_tens = real_seconds / 10;
+ val.min_ones = real_minutes % 10;
+ val.min_tens = real_minutes / 10;
+ mste_write(&val);
+ }
+ else
+ return -1;
+ return 0;
+}
+
+int atari_tt_set_clock_mmss (unsigned long nowtime)
+{
+ int retval = 0;
+ short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
+ unsigned char save_control, save_freq_select, rtc_minutes;
+
+ save_control = RTC_READ (RTC_CONTROL); /* tell the clock it's being set */
+ RTC_WRITE (RTC_CONTROL, save_control | RTC_SET);
+
+ save_freq_select = RTC_READ (RTC_FREQ_SELECT); /* stop and reset prescaler */
+ RTC_WRITE (RTC_FREQ_SELECT, save_freq_select | RTC_DIV_RESET2);
+
+ rtc_minutes = RTC_READ (RTC_MINUTES);
+ if (!(save_control & RTC_DM_BINARY))
+ BCD_TO_BIN (rtc_minutes);
+
+ /* Since we're only adjusting minutes and seconds, don't interfere
+ with hour overflow. This avoids messing with unknown time zones
+ but requires your RTC not to be off by more than 30 minutes. */
+ if ((rtc_minutes < real_minutes
+ ? real_minutes - rtc_minutes
+ : rtc_minutes - real_minutes) < 30)
+ {
+ if (!(save_control & RTC_DM_BINARY))
+ {
+ BIN_TO_BCD (real_seconds);
+ BIN_TO_BCD (real_minutes);
+ }
+ RTC_WRITE (RTC_SECONDS, real_seconds);
+ RTC_WRITE (RTC_MINUTES, real_minutes);
+ }
+ else
+ retval = -1;
+
+ RTC_WRITE (RTC_FREQ_SELECT, save_freq_select);
+ RTC_WRITE (RTC_CONTROL, save_control);
+ return retval;
+}
+
+/*
+ * Local variables:
+ * c-indent-level: 4
+ * tab-width: 8
+ * End:
+ */