ALPHA: support graphics on non-zero PCI domains
This code replaces earlier and incomplete handling of graphics on non-zero PCI
domains (aka hoses or peer PCI buses).
An option (CONFIG_VGA_HOSE) is set TRUE if configuring a GENERIC kernel, or a
kernel for MARVEL, TITAN, or TSUNAMI machines, as these are the machines whose
SRM consoles are capable of configuring and handling graphics options on
non-zero hoses. All other machines have the option set FALSE.
A routine, "find_console_vga_hose()", is used to find the graphics device
which the machine's firmware believes is the console device, and it sets a
global (pci_vga_hose) for later use in managing access to the device. This is
called in "init_arch" on TITAN and TSUNAMI machines; MARVEL machines use a
custom version of this routine because of extra complexity.
A routine, "locate_and_init_vga()", is used to find the graphics device and
set a global (pci_vga_hose) for later use in managing access to the device, in
the case where "find_console_vga_hose" has failed.
Various adjustments are made to the ioremap and ioportmap routines for
detecting and translating "legacy" VGA register and memory references to the
real PCI domain.
[akpm@linux-foundation.org: don't statically init bss]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Jay Estabrook <jay.estabrook@hp.com>
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 770f717..905e864 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -481,6 +481,15 @@
depends on ALPHA_GENERIC || ALPHA_PC164
default y
+config VGA_HOSE
+ bool
+ depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI
+ default y
+ help
+ Support VGA on an arbitrary hose; needed for several platforms
+ which always have multiple hoses, and whose consoles support it.
+
+
config ALPHA_SRM
bool "Use SRM as bootloader" if ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS || ALPHA_NONAME
default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
@@ -644,6 +653,13 @@
source "arch/alpha/Kconfig.debug"
+# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
+# but we also need it if VGA_HOSE is set
+config DUMMY_CONSOLE
+ bool
+ depends on VGA_HOSE
+ default y
+
source "security/Kconfig"
source "crypto/Kconfig"
diff --git a/arch/alpha/kernel/console.c b/arch/alpha/kernel/console.c
index f313b34..da711e3 100644
--- a/arch/alpha/kernel/console.c
+++ b/arch/alpha/kernel/console.c
@@ -9,16 +9,20 @@
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/console.h>
+#include <linux/vt.h>
#include <asm/vga.h>
#include <asm/machvec.h>
+#include "pci_impl.h"
+
#ifdef CONFIG_VGA_HOSE
-/*
- * Externally-visible vga hose bases
- */
-unsigned long __vga_hose_io_base = 0; /* base for default hose */
-unsigned long __vga_hose_mem_base = 0; /* base for default hose */
+struct pci_controller *pci_vga_hose;
+static struct resource alpha_vga = {
+ .name = "alpha-vga+",
+ .start = 0x3C0,
+ .end = 0x3DF
+};
static struct pci_controller * __init
default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2)
@@ -30,36 +34,58 @@
}
void __init
-set_vga_hose(struct pci_controller *hose)
-{
- if (hose) {
- __vga_hose_io_base = hose->io_space->start;
- __vga_hose_mem_base = hose->mem_space->start;
- }
-}
-
-void __init
locate_and_init_vga(void *(*sel_func)(void *, void *))
{
struct pci_controller *hose = NULL;
struct pci_dev *dev = NULL;
+ /* Default the select function */
if (!sel_func) sel_func = (void *)default_vga_hose_select;
+ /* Find the console VGA device */
for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) {
- if (!hose) hose = dev->sysdata;
- else hose = sel_func(hose, dev->sysdata);
+ if (!hose)
+ hose = dev->sysdata;
+ else
+ hose = sel_func(hose, dev->sysdata);
}
- /* Did we already inititialize the correct one? */
- if (conswitchp == &vga_con &&
- __vga_hose_io_base == hose->io_space->start &&
- __vga_hose_mem_base == hose->mem_space->start)
+ /* Did we already initialize the correct one? Is there one? */
+ if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose))
return;
- /* Set the VGA hose and init the new console */
- set_vga_hose(hose);
+ /* Create a new VGA ioport resource WRT the hose it is on. */
+ alpha_vga.start += hose->io_space->start;
+ alpha_vga.end += hose->io_space->start;
+ request_resource(hose->io_space, &alpha_vga);
+
+ /* Set the VGA hose and init the new console. */
+ pci_vga_hose = hose;
take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);
}
+void __init
+find_console_vga_hose(void)
+{
+ u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
+
+ if (pu64[7] == 3) { /* TERM_TYPE == graphics */
+ struct pci_controller *hose;
+ int h = (pu64[30] >> 24) & 0xff; /* console hose # */
+
+ /*
+ * Our hose numbering DOES match the console's, so find
+ * the right one...
+ */
+ for (hose = hose_head; hose; hose = hose->next) {
+ if (hose->index == h) break;
+ }
+
+ if (hose) {
+ printk("Console graphics on hose %d\n", h);
+ pci_vga_hose = hose;
+ }
+ }
+}
+
#endif
diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c
index 7f6a984..f10d2ed 100644
--- a/arch/alpha/kernel/core_marvel.c
+++ b/arch/alpha/kernel/core_marvel.c
@@ -25,6 +25,7 @@
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/rtc.h>
+#include <asm/vga.h>
#include "proto.h"
#include "pci_impl.h"
@@ -367,9 +368,8 @@
}
static void __init
-marvel_init_vga_hose(void)
+marvel_find_console_vga_hose(void)
{
-#ifdef CONFIG_VGA_HOSE
u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
if (pu64[7] == 3) { /* TERM_TYPE == graphics */
@@ -403,7 +403,6 @@
pci_vga_hose = hose;
}
}
-#endif /* CONFIG_VGA_HOSE */
}
gct6_search_struct gct_wanted_node_list[] = {
@@ -459,7 +458,7 @@
marvel_init_io7(io7);
/* Check for graphic console location (if any). */
- marvel_init_vga_hose();
+ marvel_find_console_vga_hose();
}
void
@@ -684,9 +683,6 @@
/*
* IO map support.
*/
-
-#define __marvel_is_mem_vga(a) (((a) >= 0xa0000) && ((a) <= 0xc0000))
-
void __iomem *
marvel_ioremap(unsigned long addr, unsigned long size)
{
@@ -698,13 +694,9 @@
unsigned long pfn;
/*
- * Adjust the addr.
+ * Adjust the address.
*/
-#ifdef CONFIG_VGA_HOSE
- if (pci_vga_hose && __marvel_is_mem_vga(addr)) {
- addr += pci_vga_hose->mem_space->start;
- }
-#endif
+ FIXUP_MEMADDR_VGA(addr);
/*
* Find the hose.
@@ -781,7 +773,9 @@
return (void __iomem *) vaddr;
}
- return NULL;
+ /* Assume it was already a reasonable address */
+ vaddr = baddr + hose->mem_space->start;
+ return (void __iomem *) vaddr;
}
void
@@ -803,21 +797,12 @@
return (addr & 0xFF000000UL) == 0;
}
-#define __marvel_is_port_vga(a) \
- (((a) >= 0x3b0) && ((a) < 0x3e0) && ((a) != 0x3b3) && ((a) != 0x3d3))
#define __marvel_is_port_kbd(a) (((a) == 0x60) || ((a) == 0x64))
#define __marvel_is_port_rtc(a) (((a) == 0x70) || ((a) == 0x71))
void __iomem *marvel_ioportmap (unsigned long addr)
{
- if (__marvel_is_port_rtc (addr) || __marvel_is_port_kbd(addr))
- ;
-#ifdef CONFIG_VGA_HOSE
- else if (__marvel_is_port_vga (addr) && pci_vga_hose)
- addr += pci_vga_hose->io_space->start;
-#endif
- else
- return NULL;
+ FIXUP_IOADDR_VGA(addr);
return (void __iomem *)addr;
}
@@ -829,8 +814,14 @@
return 0;
else if (__marvel_is_port_rtc(addr))
return __marvel_rtc_io(0, addr, 0);
- else
+ else if (marvel_is_ioaddr(addr))
return __kernel_ldbu(*(vucp)addr);
+ else
+ /* this should catch other legacy addresses
+ that would normally fail on MARVEL,
+ because there really is nothing there...
+ */
+ return ~0;
}
void
@@ -841,7 +832,7 @@
return;
else if (__marvel_is_port_rtc(addr))
__marvel_rtc_io(b, addr, 1);
- else
+ else if (marvel_is_ioaddr(addr))
__kernel_stb(b, *(vucp)addr);
}
diff --git a/arch/alpha/kernel/core_titan.c b/arch/alpha/kernel/core_titan.c
index 3662fef..8193266 100644
--- a/arch/alpha/kernel/core_titan.c
+++ b/arch/alpha/kernel/core_titan.c
@@ -21,6 +21,7 @@
#include <asm/smp.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
+#include <asm/vga.h>
#include "proto.h"
#include "pci_impl.h"
@@ -35,6 +36,11 @@
} saved_config[4] __attribute__((common));
/*
+ * Is PChip 1 present? No need to query it more than once.
+ */
+static int titan_pchip1_present;
+
+/*
* BIOS32-style PCI interface:
*/
@@ -344,43 +350,17 @@
static void __init
titan_init_pachips(titan_pachip *pachip0, titan_pachip *pachip1)
{
- int pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
+ titan_pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
/* Init the ports in hose order... */
titan_init_one_pachip_port(&pachip0->g_port, 0); /* hose 0 */
- if (pchip1_present)
+ if (titan_pchip1_present)
titan_init_one_pachip_port(&pachip1->g_port, 1);/* hose 1 */
titan_init_one_pachip_port(&pachip0->a_port, 2); /* hose 2 */
- if (pchip1_present)
+ if (titan_pchip1_present)
titan_init_one_pachip_port(&pachip1->a_port, 3);/* hose 3 */
}
-static void __init
-titan_init_vga_hose(void)
-{
-#ifdef CONFIG_VGA_HOSE
- u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
-
- if (pu64[7] == 3) { /* TERM_TYPE == graphics */
- struct pci_controller *hose;
- int h = (pu64[30] >> 24) & 0xff; /* console hose # */
-
- /*
- * Our hose numbering matches the console's, so just find
- * the right one...
- */
- for (hose = hose_head; hose; hose = hose->next) {
- if (hose->index == h) break;
- }
-
- if (hose) {
- printk("Console graphics on hose %d\n", hose->index);
- pci_vga_hose = hose;
- }
- }
-#endif /* CONFIG_VGA_HOSE */
-}
-
void __init
titan_init_arch(void)
{
@@ -406,6 +386,7 @@
/* With multiple PCI busses, we play with I/O as physical addrs. */
ioport_resource.end = ~0UL;
+ iomem_resource.end = ~0UL;
/* PCI DMA Direct Mapping is 1GB at 2GB. */
__direct_map_base = 0x80000000;
@@ -415,7 +396,7 @@
titan_init_pachips(TITAN_pachip0, TITAN_pachip1);
/* Check for graphic console location (if any). */
- titan_init_vga_hose();
+ find_console_vga_hose();
}
static void
@@ -441,9 +422,7 @@
static void
titan_kill_pachips(titan_pachip *pachip0, titan_pachip *pachip1)
{
- int pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
-
- if (pchip1_present) {
+ if (titan_pchip1_present) {
titan_kill_one_pachip_port(&pachip1->g_port, 1);
titan_kill_one_pachip_port(&pachip1->a_port, 3);
}
@@ -463,6 +442,14 @@
*/
void __iomem *
+titan_ioportmap(unsigned long addr)
+{
+ FIXUP_IOADDR_VGA(addr);
+ return (void __iomem *)(addr + TITAN_IO_BIAS);
+}
+
+
+void __iomem *
titan_ioremap(unsigned long addr, unsigned long size)
{
int h = (addr & TITAN_HOSE_MASK) >> TITAN_HOSE_SHIFT;
@@ -475,14 +462,12 @@
unsigned long pfn;
/*
- * Adjust the addr.
+ * Adjust the address and hose, if necessary.
*/
-#ifdef CONFIG_VGA_HOSE
- if (pci_vga_hose && __titan_is_mem_vga(addr)) {
+ if (pci_vga_hose && __is_mem_vga(addr)) {
h = pci_vga_hose->index;
addr += pci_vga_hose->mem_space->start;
}
-#endif
/*
* Find the hose.
@@ -521,8 +506,10 @@
* Map it
*/
area = get_vm_area(size, VM_IOREMAP);
- if (!area)
+ if (!area) {
+ printk("ioremap failed... no vm_area...\n");
return NULL;
+ }
ptes = hose->sg_pci->ptes;
for (vaddr = (unsigned long)area->addr;
@@ -539,7 +526,7 @@
if (__alpha_remap_area_pages(vaddr,
pfn << PAGE_SHIFT,
PAGE_SIZE, 0)) {
- printk("FAILED to map...\n");
+ printk("FAILED to remap_area_pages...\n");
vfree(area->addr);
return NULL;
}
@@ -551,7 +538,8 @@
return (void __iomem *) vaddr;
}
- return NULL;
+ /* Assume a legacy (read: VGA) address, and return appropriately. */
+ return (void __iomem *)(addr + TITAN_MEM_BIAS);
}
void
@@ -574,6 +562,7 @@
}
#ifndef CONFIG_ALPHA_GENERIC
+EXPORT_SYMBOL(titan_ioportmap);
EXPORT_SYMBOL(titan_ioremap);
EXPORT_SYMBOL(titan_iounmap);
EXPORT_SYMBOL(titan_is_mmio);
@@ -750,6 +739,7 @@
if (titan_query_agp(port))
hosenum = 2;
if (hosenum < 0 &&
+ titan_pchip1_present &&
titan_query_agp(port = &TITAN_pachip1->a_port))
hosenum = 3;
diff --git a/arch/alpha/kernel/core_tsunami.c b/arch/alpha/kernel/core_tsunami.c
index ce623c6..ef91e09 100644
--- a/arch/alpha/kernel/core_tsunami.c
+++ b/arch/alpha/kernel/core_tsunami.c
@@ -19,6 +19,7 @@
#include <asm/ptrace.h>
#include <asm/smp.h>
+#include <asm/vga.h>
#include "proto.h"
#include "pci_impl.h"
@@ -349,6 +350,26 @@
tsunami_pci_tbi(hose, 0, -1);
}
+
+void __iomem *
+tsunami_ioportmap(unsigned long addr)
+{
+ FIXUP_IOADDR_VGA(addr);
+ return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
+}
+
+void __iomem *
+tsunami_ioremap(unsigned long addr, unsigned long size)
+{
+ FIXUP_MEMADDR_VGA(addr);
+ return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
+}
+
+#ifndef CONFIG_ALPHA_GENERIC
+EXPORT_SYMBOL(tsunami_ioportmap);
+EXPORT_SYMBOL(tsunami_ioremap);
+#endif
+
void __init
tsunami_init_arch(void)
{
@@ -393,6 +414,9 @@
tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
if (TSUNAMI_cchip->csc.csr & 1L<<14)
tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
+
+ /* Check for graphic console location (if any). */
+ find_console_vga_hose();
}
static void
diff --git a/arch/alpha/kernel/proto.h b/arch/alpha/kernel/proto.h
index 95912ec..708d5ca 100644
--- a/arch/alpha/kernel/proto.h
+++ b/arch/alpha/kernel/proto.h
@@ -108,6 +108,15 @@
extern unsigned long wildfire_node_mem_start(int);
extern unsigned long wildfire_node_mem_size(int);
+/* console.c */
+#ifdef CONFIG_VGA_HOSE
+extern void find_console_vga_hose(void);
+extern void locate_and_init_vga(void *(*)(void *, void *));
+#else
+static inline void find_console_vga_hose(void) { }
+static inline void locate_and_init_vga(void *(*sel_func)(void *, void *)) { }
+#endif
+
/* setup.c */
extern unsigned long srm_hae;
extern int boot_cpuid;
diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c
index 85d2f93..c71b0fd 100644
--- a/arch/alpha/kernel/sys_dp264.c
+++ b/arch/alpha/kernel/sys_dp264.c
@@ -543,6 +543,7 @@
{
common_init_pci();
SMC669_Init(0);
+ locate_and_init_vga(NULL);
}
static void __init
@@ -551,6 +552,14 @@
common_init_pci();
SMC669_Init(1);
es1888_init();
+ locate_and_init_vga(NULL);
+}
+
+static void __init
+clipper_init_pci(void)
+{
+ common_init_pci();
+ locate_and_init_vga(NULL);
}
static void __init
@@ -655,7 +664,7 @@
.init_arch = tsunami_init_arch,
.init_irq = clipper_init_irq,
.init_rtc = common_init_rtc,
- .init_pci = common_init_pci,
+ .init_pci = clipper_init_pci,
.kill_arch = tsunami_kill_arch,
.pci_map_irq = clipper_map_irq,
.pci_swizzle = common_swizzle,
diff --git a/arch/alpha/kernel/sys_marvel.c b/arch/alpha/kernel/sys_marvel.c
index e349f03..0bcb968 100644
--- a/arch/alpha/kernel/sys_marvel.c
+++ b/arch/alpha/kernel/sys_marvel.c
@@ -22,6 +22,7 @@
#include <asm/core_marvel.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>
+#include <asm/vga.h>
#include "proto.h"
#include "err_impl.h"
@@ -412,10 +413,7 @@
pci_probe_only = 1;
common_init_pci();
-
-#ifdef CONFIG_VGA_HOSE
locate_and_init_vga(NULL);
-#endif
/* Clear any io7 errors. */
for (io7 = NULL; (io7 = marvel_next_io7(io7)) != NULL; )
diff --git a/arch/alpha/kernel/sys_titan.c b/arch/alpha/kernel/sys_titan.c
index f009b7b..1d3c139 100644
--- a/arch/alpha/kernel/sys_titan.c
+++ b/arch/alpha/kernel/sys_titan.c
@@ -331,9 +331,7 @@
pci_probe_only = 1;
common_init_pci();
SMC669_Init(0);
-#ifdef CONFIG_VGA_HOSE
locate_and_init_vga(NULL);
-#endif
}