blob: 3ba87835757e2cfd5319d54e6992dd2d313488e7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Paul Mackerras033ef332005-10-26 17:05:24 +10002 * 64-bit pSeries and RS/6000 setup code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Copyright (C) 1995 Linus Torvalds
5 * Adapted from 'alpha' version by Gary Thomas
6 * Modified by Cort Dougan (cort@cs.nmt.edu)
7 * Modified by PPC64 Team, IBM Corp
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15/*
16 * bootup setup stuff..
17 */
18
19#undef DEBUG
20
21#include <linux/config.h>
Michael Ellerman62d60e92005-07-07 17:56:30 -070022#include <linux/cpu.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/errno.h>
24#include <linux/sched.h>
25#include <linux/kernel.h>
26#include <linux/mm.h>
27#include <linux/stddef.h>
28#include <linux/unistd.h>
29#include <linux/slab.h>
30#include <linux/user.h>
31#include <linux/a.out.h>
32#include <linux/tty.h>
33#include <linux/major.h>
34#include <linux/interrupt.h>
35#include <linux/reboot.h>
36#include <linux/init.h>
37#include <linux/ioport.h>
38#include <linux/console.h>
39#include <linux/pci.h>
Olaf Heringcebb2b12005-07-10 19:35:15 +000040#include <linux/utsname.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/adb.h>
42#include <linux/module.h>
43#include <linux/delay.h>
44#include <linux/irq.h>
45#include <linux/seq_file.h>
46#include <linux/root_dev.h>
47
48#include <asm/mmu.h>
49#include <asm/processor.h>
50#include <asm/io.h>
51#include <asm/pgtable.h>
52#include <asm/prom.h>
53#include <asm/rtas.h>
54#include <asm/pci-bridge.h>
55#include <asm/iommu.h>
56#include <asm/dma.h>
57#include <asm/machdep.h>
58#include <asm/irq.h>
Michael Ellerman3d1229d2005-11-14 23:35:00 +110059#include <asm/kexec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <asm/time.h>
61#include <asm/nvram.h>
David Gibson007e8f52005-10-28 15:35:50 +100062#include "xics.h"
Michael Ellerman180a3362005-08-09 11:13:36 +100063#include <asm/pmc.h>
Stephen Rothwellbbeb3f42005-09-27 13:51:59 +100064#include <asm/mpic.h>
Stephen Rothwelld3878992005-09-28 02:50:25 +100065#include <asm/ppc-pci.h>
Paul Mackerras69a80d32005-10-10 22:03:41 +100066#include <asm/i8259.h>
67#include <asm/udbg.h>
Paul Mackerras2249ca92005-11-07 13:18:13 +110068#include <asm/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Michael Ellermana1218722005-11-03 15:33:31 +110070#include "plpar_wrappers.h"
Arnd Bergmannc902be72006-01-04 19:55:53 +000071#include "ras.h"
Michael Ellerman19657462006-02-10 15:47:36 +110072#include "firmware.h"
Michael Ellermana1218722005-11-03 15:33:31 +110073
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#ifdef DEBUG
75#define DBG(fmt...) udbg_printf(fmt)
76#else
77#define DBG(fmt...)
78#endif
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080extern void find_udbg_vterm(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82int fwnmi_active; /* TRUE if an FWNMI handler is present */
83
Paul Mackerrasfbd77402006-03-27 15:06:20 +110084static void pseries_shared_idle_sleep(void);
85static void pseries_dedicated_idle_sleep(void);
Michael Ellerman62d60e92005-07-07 17:56:30 -070086
Linus Torvalds1da177e2005-04-16 15:20:36 -070087struct mpic *pSeries_mpic;
88
Arnd Bergmann84461962006-01-11 00:00:02 +000089static void pSeries_show_cpuinfo(struct seq_file *m)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 struct device_node *root;
92 const char *model = "";
93
94 root = of_find_node_by_path("/");
95 if (root)
96 model = get_property(root, "model", NULL);
97 seq_printf(m, "machine\t\t: CHRP %s\n", model);
98 of_node_put(root);
99}
100
101/* Initialize firmware assisted non-maskable interrupts if
102 * the firmware supports this feature.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 */
104static void __init fwnmi_init(void)
105{
Michael Ellerman8c4f1f22005-12-04 18:39:33 +1100106 unsigned long system_reset_addr, machine_check_addr;
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 int ibm_nmi_register = rtas_token("ibm,nmi-register");
109 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
110 return;
Michael Ellerman8c4f1f22005-12-04 18:39:33 +1100111
112 /* If the kernel's not linked at zero we point the firmware at low
113 * addresses anyway, and use a trampoline to get to the real code. */
114 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START;
115 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
116
117 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
118 machine_check_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 fwnmi_active = 1;
120}
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122static void __init pSeries_init_mpic(void)
123{
124 unsigned int *addrp;
125 struct device_node *np;
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000126 unsigned long intack = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128 /* All ISUs are setup, complete initialization */
129 mpic_init(pSeries_mpic);
130
131 /* Check what kind of cascade ACK we have */
132 if (!(np = of_find_node_by_name(NULL, "pci"))
133 || !(addrp = (unsigned int *)
134 get_property(np, "8259-interrupt-acknowledge", NULL)))
135 printk(KERN_ERR "Cannot find pci to get ack address\n");
136 else
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000137 intack = addrp[prom_n_addr_cells(np)-1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 of_node_put(np);
139
140 /* Setup the legacy interrupts & controller */
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000141 i8259_init(intack, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143 /* Hook cascade to mpic */
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000144 mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145}
146
147static void __init pSeries_setup_mpic(void)
148{
149 unsigned int *opprop;
150 unsigned long openpic_addr = 0;
151 unsigned char senses[NR_IRQS - NUM_ISA_INTERRUPTS];
152 struct device_node *root;
153 int irq_count;
154
155 /* Find the Open PIC if present */
156 root = of_find_node_by_path("/");
157 opprop = (unsigned int *) get_property(root, "platform-open-pic", NULL);
158 if (opprop != 0) {
159 int n = prom_n_addr_cells(root);
160
161 for (openpic_addr = 0; n > 0; --n)
162 openpic_addr = (openpic_addr << 32) + *opprop++;
163 printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
164 }
165 of_node_put(root);
166
167 BUG_ON(openpic_addr == 0);
168
169 /* Get the sense values from OF */
170 prom_get_irq_senses(senses, NUM_ISA_INTERRUPTS, NR_IRQS);
171
172 /* Setup the openpic driver */
173 irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */
174 pSeries_mpic = mpic_alloc(openpic_addr, MPIC_PRIMARY,
175 16, 16, irq_count, /* isu size, irq offset, irq count */
176 NR_IRQS - 4, /* ipi offset */
177 senses, irq_count, /* sense & sense size */
178 " MPIC ");
179}
180
Michael Ellerman180a3362005-08-09 11:13:36 +1000181static void pseries_lpar_enable_pmcs(void)
182{
183 unsigned long set, reset;
184
185 power4_enable_pmcs();
186
187 set = 1UL << 63;
188 reset = 0;
189 plpar_hcall_norets(H_PERFMON, set, reset);
190
191 /* instruct hypervisor to maintain PMCs */
192 if (firmware_has_feature(FW_FEATURE_SPLPAR))
David Gibson3356bb92006-01-13 10:26:42 +1100193 get_lppaca()->pmcregs_in_use = 1;
Michael Ellerman180a3362005-08-09 11:13:36 +1000194}
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196static void __init pSeries_setup_arch(void)
197{
198 /* Fixup ppc_md depending on the type of interrupt controller */
199 if (ppc64_interrupt_controller == IC_OPEN_PIC) {
R Sharadafce0d572005-06-25 14:58:10 -0700200 ppc_md.init_IRQ = pSeries_init_mpic;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 ppc_md.get_irq = mpic_get_irq;
202 /* Allocate the mpic now, so that find_and_init_phbs() can
203 * fill the ISUs */
204 pSeries_setup_mpic();
205 } else {
206 ppc_md.init_IRQ = xics_init_IRQ;
207 ppc_md.get_irq = xics_get_irq;
208 }
209
210#ifdef CONFIG_SMP
211 smp_init_pSeries();
212#endif
213 /* openpic global configuration register (64-bit format). */
214 /* openpic Interrupt Source Unit pointer (64-bit format). */
215 /* python0 facility area (mmio) (64-bit format) REAL address. */
216
217 /* init to some ~sane value until calibrate_delay() runs */
218 loops_per_jiffy = 50000000;
219
220 if (ROOT_DEV == 0) {
221 printk("No ramdisk, default root is /dev/sda2\n");
222 ROOT_DEV = Root_SDA2;
223 }
224
225 fwnmi_init();
226
227 /* Find and initialize PCI host bridges */
228 init_pci_config_tokens();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 find_and_init_phbs();
Paul Mackerras0160f532005-09-13 20:56:20 +1000230 eeh_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 pSeries_nvram_init();
233
Michael Ellerman62d60e92005-07-07 17:56:30 -0700234 /* Choose an idle loop */
Stephen Rothwell1ababe12005-08-03 14:35:25 +1000235 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
Stephen Rothwell8d15a3e2005-08-03 14:40:16 +1000236 vpa_init(boot_cpuid);
David Gibson3356bb92006-01-13 10:26:42 +1100237 if (get_lppaca()->shared_proc) {
Michael Ellerman62d60e92005-07-07 17:56:30 -0700238 printk(KERN_INFO "Using shared processor idle loop\n");
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100239 ppc_md.power_save = pseries_shared_idle_sleep;
Michael Ellerman62d60e92005-07-07 17:56:30 -0700240 } else {
241 printk(KERN_INFO "Using dedicated idle loop\n");
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100242 ppc_md.power_save = pseries_dedicated_idle_sleep;
Michael Ellerman62d60e92005-07-07 17:56:30 -0700243 }
244 } else {
245 printk(KERN_INFO "Using default idle loop\n");
Michael Ellerman62d60e92005-07-07 17:56:30 -0700246 }
Michael Ellerman180a3362005-08-09 11:13:36 +1000247
Michael Ellerman57cfb812006-03-21 20:45:59 +1100248 if (firmware_has_feature(FW_FEATURE_LPAR))
Michael Ellerman180a3362005-08-09 11:13:36 +1000249 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
250 else
251 ppc_md.enable_pmcs = power4_enable_pmcs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252}
253
254static int __init pSeries_init_panel(void)
255{
256 /* Manually leave the kernel version on the panel. */
257 ppc_md.progress("Linux ppc64\n", 0);
Anton Blanchard3de620e2006-05-10 13:05:54 +1000258 ppc_md.progress(system_utsname.release, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 return 0;
261}
262arch_initcall(pSeries_init_panel);
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264static void __init pSeries_discover_pic(void)
265{
266 struct device_node *np;
267 char *typep;
268
269 /*
270 * Setup interrupt mapping options that are needed for finish_device_tree
271 * to properly parse the OF interrupt tree & do the virtual irq mapping
272 */
273 __irq_offset_value = NUM_ISA_INTERRUPTS;
274 ppc64_interrupt_controller = IC_INVALID;
275 for (np = NULL; (np = of_find_node_by_name(np, "interrupt-controller"));) {
276 typep = (char *)get_property(np, "compatible", NULL);
Haren Myneni9da5cad2005-12-27 15:51:07 -0800277 if (strstr(typep, "open-pic")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 ppc64_interrupt_controller = IC_OPEN_PIC;
Haren Myneni9da5cad2005-12-27 15:51:07 -0800279 break;
280 } else if (strstr(typep, "ppc-xicp")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 ppc64_interrupt_controller = IC_PPC_XIC;
Haren Myneni9da5cad2005-12-27 15:51:07 -0800282 break;
283 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 }
Haren Myneni9da5cad2005-12-27 15:51:07 -0800285 if (ppc64_interrupt_controller == IC_INVALID)
286 printk("pSeries_discover_pic: failed to recognize"
287 " interrupt-controller\n");
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289}
290
291static void pSeries_mach_cpu_die(void)
292{
293 local_irq_disable();
294 idle_task_exit();
295 /* Some hardware requires clearing the CPPR, while other hardware does not
296 * it is safe either way
297 */
298 pSeriesLP_cppr_info(0, 0);
299 rtas_stop_self();
300 /* Should never get here... */
301 BUG();
302 for(;;);
303}
304
Michael Ellermancab0af92005-11-03 15:30:49 +1100305static int pseries_set_dabr(unsigned long dabr)
306{
Michael Ellerman76032de2005-11-07 13:12:03 +1100307 return plpar_hcall_norets(H_SET_DABR, dabr);
Michael Ellermancab0af92005-11-03 15:30:49 +1100308}
309
Michael Ellerman76032de2005-11-07 13:12:03 +1100310static int pseries_set_xdabr(unsigned long dabr)
311{
312 /* We want to catch accesses from kernel and userspace */
313 return plpar_hcall_norets(H_SET_XDABR, dabr,
314 H_DABRX_KERNEL | H_DABRX_USER);
315}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317/*
318 * Early initialization. Relocation is on but do not reference unbolted pages
319 */
320static void __init pSeries_init_early(void)
321{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 DBG(" -> pSeries_init_early()\n");
323
324 fw_feature_init();
325
Michael Ellerman57cfb812006-03-21 20:45:59 +1100326 if (firmware_has_feature(FW_FEATURE_LPAR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 hpte_init_lpar();
Michael Ellerman41520242006-03-21 20:45:58 +1100328 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 hpte_init_native();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Michael Ellerman57cfb812006-03-21 20:45:59 +1100331 if (firmware_has_feature(FW_FEATURE_LPAR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 find_udbg_vterm();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Michael Ellerman76032de2005-11-07 13:12:03 +1100334 if (firmware_has_feature(FW_FEATURE_DABR))
Michael Ellermancab0af92005-11-03 15:30:49 +1100335 ppc_md.set_dabr = pseries_set_dabr;
Michael Ellerman76032de2005-11-07 13:12:03 +1100336 else if (firmware_has_feature(FW_FEATURE_XDABR))
337 ppc_md.set_dabr = pseries_set_xdabr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 iommu_init_early_pSeries();
340
341 pSeries_discover_pic();
342
343 DBG(" <- pSeries_init_early()\n");
344}
345
346
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347static int pSeries_check_legacy_ioport(unsigned int baseport)
348{
349 struct device_node *np;
350
351#define I8042_DATA_REG 0x60
352#define FDC_BASE 0x3f0
353
354
355 switch(baseport) {
356 case I8042_DATA_REG:
357 np = of_find_node_by_type(NULL, "8042");
358 if (np == NULL)
359 return -ENODEV;
360 of_node_put(np);
361 break;
362 case FDC_BASE:
363 np = of_find_node_by_type(NULL, "fdc");
364 if (np == NULL)
365 return -ENODEV;
366 of_node_put(np);
367 break;
368 }
369 return 0;
370}
371
372/*
373 * Called very early, MMU is off, device-tree isn't unflattened
374 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100376static int __init pSeries_probe_hypertas(unsigned long node,
377 const char *uname, int depth,
378 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379{
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100380 if (depth != 1 ||
381 (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0))
382 return 0;
383
384 if (of_get_flat_dt_prop(node, "ibm,hypertas-functions", NULL) != NULL)
385 powerpc_firmware_features |= FW_FEATURE_LPAR;
386
387 return 1;
388}
389
390static int __init pSeries_probe(void)
391{
Arnd Bergmann133dda12006-06-07 12:04:18 +1000392 unsigned long root = of_get_flat_dt_root();
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100393 char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
394 "device_type", NULL);
395 if (dtype == NULL)
396 return 0;
397 if (strcmp(dtype, "chrp"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 return 0;
399
Arnd Bergmann133dda12006-06-07 12:04:18 +1000400 /* Cell blades firmware claims to be chrp while it's not. Until this
401 * is fixed, we need to avoid those here.
402 */
403 if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") ||
404 of_flat_dt_is_compatible(root, "IBM,CBEA"))
405 return 0;
406
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100407 DBG("pSeries detected, looking for LPAR capability...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100409 /* Now try to figure out if we are running on LPAR */
410 of_scan_flat_dt(pSeries_probe_hypertas, NULL);
411
412 DBG("Machine is%s LPAR !\n",
413 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
Michael Ellerman57cfb812006-03-21 20:45:59 +1100414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 return 1;
416}
417
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100418
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700419DECLARE_PER_CPU(unsigned long, smt_snooze_delay);
420
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100421static void pseries_dedicated_idle_sleep(void)
Paul Mackerras143a1de2005-10-19 23:11:21 +1000422{
Anton Blanchard050a0932005-07-07 17:56:33 -0700423 unsigned int cpu = smp_processor_id();
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700424 unsigned long start_snooze;
425 unsigned long *smt_snooze_delay = &__get_cpu_var(smt_snooze_delay);
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700426
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100427 /*
428 * Indicate to the HV that we are idle. Now would be
429 * a good time to find other work to dispatch.
430 */
431 get_lppaca()->idle = 1;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700432
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100433 /*
434 * We come in with interrupts disabled, and need_resched()
435 * has been checked recently. If we should poll for a little
436 * while, do so.
437 */
438 if (*smt_snooze_delay) {
439 start_snooze = get_tb() +
440 *smt_snooze_delay * tb_ticks_per_usec;
441 local_irq_enable();
442 set_thread_flag(TIF_POLLING_NRFLAG);
Anton Blanchard050a0932005-07-07 17:56:33 -0700443
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100444 while (get_tb() < start_snooze) {
445 if (need_resched() || cpu_is_offline(cpu))
446 goto out;
447 ppc64_runlatch_off();
448 HMT_low();
449 HMT_very_low();
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700450 }
451
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100452 HMT_medium();
453 clear_thread_flag(TIF_POLLING_NRFLAG);
454 smp_mb();
455 local_irq_disable();
456 if (need_resched() || cpu_is_offline(cpu))
457 goto out;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700458 }
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100459
460 /*
461 * Cede if the other thread is not idle, so that it can
462 * go single-threaded. If the other thread is idle,
463 * we ask the hypervisor if it has pending work it
464 * wants to do and cede if it does. Otherwise we keep
465 * polling in order to reduce interrupt latency.
466 *
467 * Doing the cede when the other thread is active will
468 * result in this thread going dormant, meaning the other
469 * thread gets to run in single-threaded (ST) mode, which
470 * is slightly faster than SMT mode with this thread at
471 * very low priority. The cede enables interrupts, which
472 * doesn't matter here.
473 */
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200474 if (!lppaca[cpu ^ 1].idle || poll_pending() == H_PENDING)
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100475 cede_processor();
476
477out:
478 HMT_medium();
479 get_lppaca()->idle = 0;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700480}
481
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100482static void pseries_shared_idle_sleep(void)
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700483{
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100484 /*
485 * Indicate to the HV that we are idle. Now would be
486 * a good time to find other work to dispatch.
487 */
488 get_lppaca()->idle = 1;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700489
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100490 /*
491 * Yield the processor to the hypervisor. We return if
492 * an external interrupt occurs (which are driven prior
493 * to returning here) or if a prod occurs from another
494 * processor. When returning here, external interrupts
495 * are enabled.
496 */
497 cede_processor();
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700498
Paul Mackerrasfbd77402006-03-27 15:06:20 +1100499 get_lppaca()->idle = 0;
Michael Ellermanc66d5dd2005-07-07 17:56:29 -0700500}
501
Paul Mackerras42672922005-09-12 17:17:36 +1000502static int pSeries_pci_probe_mode(struct pci_bus *bus)
503{
Michael Ellerman57cfb812006-03-21 20:45:59 +1100504 if (firmware_has_feature(FW_FEATURE_LPAR))
Paul Mackerras42672922005-09-12 17:17:36 +1000505 return PCI_PROBE_DEVTREE;
506 return PCI_PROBE_NORMAL;
507}
508
Michael Ellermanc5e24352005-11-12 00:06:05 +1100509#ifdef CONFIG_KEXEC
510static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
511{
512 /* Don't risk a hypervisor call if we're crashing */
Michael Neuling4dc43252006-02-07 10:58:21 +1100513 if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
David Gibson3356bb92006-01-13 10:26:42 +1100514 unsigned long vpa = __pa(get_lppaca());
Michael Ellermanc5e24352005-11-12 00:06:05 +1100515
516 if (unregister_vpa(hard_smp_processor_id(), vpa)) {
517 printk("VPA deregistration of cpu %u (hw_cpu_id %d) "
518 "failed\n", smp_processor_id(),
519 hard_smp_processor_id());
520 }
521 }
522
523 if (ppc64_interrupt_controller == IC_OPEN_PIC)
524 mpic_teardown_this_cpu(secondary);
525 else
526 xics_teardown_cpu(secondary);
527}
528#endif
529
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100530define_machine(pseries) {
531 .name = "pSeries",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 .probe = pSeries_probe,
533 .setup_arch = pSeries_setup_arch,
534 .init_early = pSeries_init_early,
Paul Mackerras0dd194d2005-10-20 20:48:19 +1000535 .show_cpuinfo = pSeries_show_cpuinfo,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 .log_error = pSeries_log_error,
537 .pcibios_fixup = pSeries_final_fixup,
Paul Mackerras42672922005-09-12 17:17:36 +1000538 .pci_probe_mode = pSeries_pci_probe_mode,
John Rosedad32bb2005-06-23 17:09:54 +1000539 .irq_bus_setup = pSeries_irq_bus_setup,
Paul Mackerrasf4fcbbe2005-11-03 14:41:19 +1100540 .restart = rtas_restart,
541 .power_off = rtas_power_off,
542 .halt = rtas_halt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 .panic = rtas_os_term,
544 .cpu_die = pSeries_mach_cpu_die,
Arnd Bergmann773bf9c2005-06-23 09:43:18 +1000545 .get_boot_time = rtas_get_boot_time,
546 .get_rtc_time = rtas_get_rtc_time,
547 .set_rtc_time = rtas_set_rtc_time,
Arnd Bergmann10f7e7c2005-06-23 09:43:07 +1000548 .calibrate_decr = generic_calibrate_decr,
Arnd Bergmann6566c6f2005-06-23 09:43:28 +1000549 .progress = rtas_progress,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 .check_legacy_ioport = pSeries_check_legacy_ioport,
551 .system_reset_exception = pSeries_system_reset_exception,
552 .machine_check_exception = pSeries_machine_check_exception,
Michael Ellermanc5e24352005-11-12 00:06:05 +1100553#ifdef CONFIG_KEXEC
554 .kexec_cpu_down = pseries_kexec_cpu_down,
Michael Ellerman3d1229d2005-11-14 23:35:00 +1100555 .machine_kexec = default_machine_kexec,
556 .machine_kexec_prepare = default_machine_kexec_prepare,
Michael Ellermancc532912005-12-04 18:39:43 +1100557 .machine_crash_shutdown = default_machine_crash_shutdown,
Michael Ellermanc5e24352005-11-12 00:06:05 +1100558#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559};