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1/*
2 * Architecture-specific setup.
3 *
4 * Copyright (C) 1998-2001, 2003-2004 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 * Stephane Eranian <eranian@hpl.hp.com>
7 * Copyright (C) 2000, Rohit Seth <rohit.seth@intel.com>
8 * Copyright (C) 1999 VA Linux Systems
9 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
10 *
11 * 11/12/01 D.Mosberger Convert get_cpuinfo() to seq_file based show_cpuinfo().
12 * 04/04/00 D.Mosberger renamed cpu_initialized to cpu_online_map
13 * 03/31/00 R.Seth cpu_initialized and current->processor fixes
14 * 02/04/00 D.Mosberger some more get_cpuinfo fixes...
15 * 02/01/00 R.Seth fixed get_cpuinfo for SMP
16 * 01/07/99 S.Eranian added the support for command line argument
17 * 06/24/99 W.Drummond added boot_cpu_data.
18 */
19#include <linux/config.h>
20#include <linux/module.h>
21#include <linux/init.h>
22
23#include <linux/acpi.h>
24#include <linux/bootmem.h>
25#include <linux/console.h>
26#include <linux/delay.h>
27#include <linux/kernel.h>
28#include <linux/reboot.h>
29#include <linux/sched.h>
30#include <linux/seq_file.h>
31#include <linux/string.h>
32#include <linux/threads.h>
33#include <linux/tty.h>
34#include <linux/serial.h>
35#include <linux/serial_core.h>
36#include <linux/efi.h>
37#include <linux/initrd.h>
38
39#include <asm/ia32.h>
40#include <asm/machvec.h>
41#include <asm/mca.h>
42#include <asm/meminit.h>
43#include <asm/page.h>
44#include <asm/patch.h>
45#include <asm/pgtable.h>
46#include <asm/processor.h>
47#include <asm/sal.h>
48#include <asm/sections.h>
49#include <asm/serial.h>
50#include <asm/setup.h>
51#include <asm/smp.h>
52#include <asm/system.h>
53#include <asm/unistd.h>
54
55#if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
56# error "struct cpuinfo_ia64 too big!"
57#endif
58
59#ifdef CONFIG_SMP
60unsigned long __per_cpu_offset[NR_CPUS];
61EXPORT_SYMBOL(__per_cpu_offset);
62#endif
63
64DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info);
65DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
66DEFINE_PER_CPU(unsigned long, ia64_phys_stacked_size_p8);
67unsigned long ia64_cycles_per_usec;
68struct ia64_boot_param *ia64_boot_param;
69struct screen_info screen_info;
70
71unsigned long ia64_max_cacheline_size;
72unsigned long ia64_iobase; /* virtual address for I/O accesses */
73EXPORT_SYMBOL(ia64_iobase);
74struct io_space io_space[MAX_IO_SPACES];
75EXPORT_SYMBOL(io_space);
76unsigned int num_io_spaces;
77
78/*
79 * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This
80 * mask specifies a mask of address bits that must be 0 in order for two buffers to be
81 * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start
82 * address of the second buffer must be aligned to (merge_mask+1) in order to be
83 * mergeable). By default, we assume there is no I/O MMU which can merge physically
84 * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu
85 * page-size of 2^64.
86 */
87unsigned long ia64_max_iommu_merge_mask = ~0UL;
88EXPORT_SYMBOL(ia64_max_iommu_merge_mask);
89
90/*
91 * We use a special marker for the end of memory and it uses the extra (+1) slot
92 */
93struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1];
94int num_rsvd_regions;
95
96
97/*
98 * Filter incoming memory segments based on the primitive map created from the boot
99 * parameters. Segments contained in the map are removed from the memory ranges. A
100 * caller-specified function is called with the memory ranges that remain after filtering.
101 * This routine does not assume the incoming segments are sorted.
102 */
103int
104filter_rsvd_memory (unsigned long start, unsigned long end, void *arg)
105{
106 unsigned long range_start, range_end, prev_start;
107 void (*func)(unsigned long, unsigned long, int);
108 int i;
109
110#if IGNORE_PFN0
111 if (start == PAGE_OFFSET) {
112 printk(KERN_WARNING "warning: skipping physical page 0\n");
113 start += PAGE_SIZE;
114 if (start >= end) return 0;
115 }
116#endif
117 /*
118 * lowest possible address(walker uses virtual)
119 */
120 prev_start = PAGE_OFFSET;
121 func = arg;
122
123 for (i = 0; i < num_rsvd_regions; ++i) {
124 range_start = max(start, prev_start);
125 range_end = min(end, rsvd_region[i].start);
126
127 if (range_start < range_end)
128 call_pernode_memory(__pa(range_start), range_end - range_start, func);
129
130 /* nothing more available in this segment */
131 if (range_end == end) return 0;
132
133 prev_start = rsvd_region[i].end;
134 }
135 /* end of memory marker allows full processing inside loop body */
136 return 0;
137}
138
139static void
140sort_regions (struct rsvd_region *rsvd_region, int max)
141{
142 int j;
143
144 /* simple bubble sorting */
145 while (max--) {
146 for (j = 0; j < max; ++j) {
147 if (rsvd_region[j].start > rsvd_region[j+1].start) {
148 struct rsvd_region tmp;
149 tmp = rsvd_region[j];
150 rsvd_region[j] = rsvd_region[j + 1];
151 rsvd_region[j + 1] = tmp;
152 }
153 }
154 }
155}
156
157/**
158 * reserve_memory - setup reserved memory areas
159 *
160 * Setup the reserved memory areas set aside for the boot parameters,
161 * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
162 * see include/asm-ia64/meminit.h if you need to define more.
163 */
164void
165reserve_memory (void)
166{
167 int n = 0;
168
169 /*
170 * none of the entries in this table overlap
171 */
172 rsvd_region[n].start = (unsigned long) ia64_boot_param;
173 rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
174 n++;
175
176 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
177 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
178 n++;
179
180 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
181 rsvd_region[n].end = (rsvd_region[n].start
182 + strlen(__va(ia64_boot_param->command_line)) + 1);
183 n++;
184
185 rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
186 rsvd_region[n].end = (unsigned long) ia64_imva(_end);
187 n++;
188
189#ifdef CONFIG_BLK_DEV_INITRD
190 if (ia64_boot_param->initrd_start) {
191 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
192 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
193 n++;
194 }
195#endif
196
197 /* end of memory marker */
198 rsvd_region[n].start = ~0UL;
199 rsvd_region[n].end = ~0UL;
200 n++;
201
202 num_rsvd_regions = n;
203
204 sort_regions(rsvd_region, num_rsvd_regions);
205}
206
207/**
208 * find_initrd - get initrd parameters from the boot parameter structure
209 *
210 * Grab the initrd start and end from the boot parameter struct given us by
211 * the boot loader.
212 */
213void
214find_initrd (void)
215{
216#ifdef CONFIG_BLK_DEV_INITRD
217 if (ia64_boot_param->initrd_start) {
218 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
219 initrd_end = initrd_start+ia64_boot_param->initrd_size;
220
221 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
222 initrd_start, ia64_boot_param->initrd_size);
223 }
224#endif
225}
226
227static void __init
228io_port_init (void)
229{
230 extern unsigned long ia64_iobase;
231 unsigned long phys_iobase;
232
233 /*
234 * Set `iobase' to the appropriate address in region 6 (uncached access range).
235 *
236 * The EFI memory map is the "preferred" location to get the I/O port space base,
237 * rather the relying on AR.KR0. This should become more clear in future SAL
238 * specs. We'll fall back to getting it out of AR.KR0 if no appropriate entry is
239 * found in the memory map.
240 */
241 phys_iobase = efi_get_iobase();
242 if (phys_iobase)
243 /* set AR.KR0 since this is all we use it for anyway */
244 ia64_set_kr(IA64_KR_IO_BASE, phys_iobase);
245 else {
246 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
247 printk(KERN_INFO "No I/O port range found in EFI memory map, falling back "
248 "to AR.KR0\n");
249 printk(KERN_INFO "I/O port base = 0x%lx\n", phys_iobase);
250 }
251 ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
252
253 /* setup legacy IO port space */
254 io_space[0].mmio_base = ia64_iobase;
255 io_space[0].sparse = 1;
256 num_io_spaces = 1;
257}
258
259/**
260 * early_console_setup - setup debugging console
261 *
262 * Consoles started here require little enough setup that we can start using
263 * them very early in the boot process, either right after the machine
264 * vector initialization, or even before if the drivers can detect their hw.
265 *
266 * Returns non-zero if a console couldn't be setup.
267 */
268static inline int __init
269early_console_setup (char *cmdline)
270{
271#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
272 {
273 extern int sn_serial_console_early_setup(void);
274 if (!sn_serial_console_early_setup())
275 return 0;
276 }
277#endif
278#ifdef CONFIG_EFI_PCDP
279 if (!efi_setup_pcdp_console(cmdline))
280 return 0;
281#endif
282#ifdef CONFIG_SERIAL_8250_CONSOLE
283 if (!early_serial_console_init(cmdline))
284 return 0;
285#endif
286
287 return -1;
288}
289
290static inline void
291mark_bsp_online (void)
292{
293#ifdef CONFIG_SMP
294 /* If we register an early console, allow CPU 0 to printk */
295 cpu_set(smp_processor_id(), cpu_online_map);
296#endif
297}
298
299void __init
300setup_arch (char **cmdline_p)
301{
302 unw_init();
303
304 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
305
306 *cmdline_p = __va(ia64_boot_param->command_line);
307 strlcpy(saved_command_line, *cmdline_p, COMMAND_LINE_SIZE);
308
309 efi_init();
310 io_port_init();
311
312#ifdef CONFIG_IA64_GENERIC
313 {
314 const char *mvec_name = strstr (*cmdline_p, "machvec=");
315 char str[64];
316
317 if (mvec_name) {
318 const char *end;
319 size_t len;
320
321 mvec_name += 8;
322 end = strchr (mvec_name, ' ');
323 if (end)
324 len = end - mvec_name;
325 else
326 len = strlen (mvec_name);
327 len = min(len, sizeof (str) - 1);
328 strncpy (str, mvec_name, len);
329 str[len] = '\0';
330 mvec_name = str;
331 } else
332 mvec_name = acpi_get_sysname();
333 machvec_init(mvec_name);
334 }
335#endif
336
337 if (early_console_setup(*cmdline_p) == 0)
338 mark_bsp_online();
339
340#ifdef CONFIG_ACPI_BOOT
341 /* Initialize the ACPI boot-time table parser */
342 acpi_table_init();
343# ifdef CONFIG_ACPI_NUMA
344 acpi_numa_init();
345# endif
346#else
347# ifdef CONFIG_SMP
348 smp_build_cpu_map(); /* happens, e.g., with the Ski simulator */
349# endif
350#endif /* CONFIG_APCI_BOOT */
351
352 find_memory();
353
354 /* process SAL system table: */
355 ia64_sal_init(efi.sal_systab);
356
357#ifdef CONFIG_SMP
358 cpu_physical_id(0) = hard_smp_processor_id();
359#endif
360
361 cpu_init(); /* initialize the bootstrap CPU */
362
363#ifdef CONFIG_ACPI_BOOT
364 acpi_boot_init();
365#endif
366
367#ifdef CONFIG_VT
368 if (!conswitchp) {
369# if defined(CONFIG_DUMMY_CONSOLE)
370 conswitchp = &dummy_con;
371# endif
372# if defined(CONFIG_VGA_CONSOLE)
373 /*
374 * Non-legacy systems may route legacy VGA MMIO range to system
375 * memory. vga_con probes the MMIO hole, so memory looks like
376 * a VGA device to it. The EFI memory map can tell us if it's
377 * memory so we can avoid this problem.
378 */
379 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
380 conswitchp = &vga_con;
381# endif
382 }
383#endif
384
385 /* enable IA-64 Machine Check Abort Handling unless disabled */
386 if (!strstr(saved_command_line, "nomca"))
387 ia64_mca_init();
388
389 platform_setup(cmdline_p);
390 paging_init();
391}
392
393/*
394 * Display cpu info for all cpu's.
395 */
396static int
397show_cpuinfo (struct seq_file *m, void *v)
398{
399#ifdef CONFIG_SMP
400# define lpj c->loops_per_jiffy
401# define cpunum c->cpu
402#else
403# define lpj loops_per_jiffy
404# define cpunum 0
405#endif
406 static struct {
407 unsigned long mask;
408 const char *feature_name;
409 } feature_bits[] = {
410 { 1UL << 0, "branchlong" },
411 { 1UL << 1, "spontaneous deferral"},
412 { 1UL << 2, "16-byte atomic ops" }
413 };
414 char family[32], features[128], *cp, sep;
415 struct cpuinfo_ia64 *c = v;
416 unsigned long mask;
417 int i;
418
419 mask = c->features;
420
421 switch (c->family) {
422 case 0x07: memcpy(family, "Itanium", 8); break;
423 case 0x1f: memcpy(family, "Itanium 2", 10); break;
424 default: sprintf(family, "%u", c->family); break;
425 }
426
427 /* build the feature string: */
428 memcpy(features, " standard", 10);
429 cp = features;
430 sep = 0;
431 for (i = 0; i < (int) ARRAY_SIZE(feature_bits); ++i) {
432 if (mask & feature_bits[i].mask) {
433 if (sep)
434 *cp++ = sep;
435 sep = ',';
436 *cp++ = ' ';
437 strcpy(cp, feature_bits[i].feature_name);
438 cp += strlen(feature_bits[i].feature_name);
439 mask &= ~feature_bits[i].mask;
440 }
441 }
442 if (mask) {
443 /* print unknown features as a hex value: */
444 if (sep)
445 *cp++ = sep;
446 sprintf(cp, " 0x%lx", mask);
447 }
448
449 seq_printf(m,
450 "processor : %d\n"
451 "vendor : %s\n"
452 "arch : IA-64\n"
453 "family : %s\n"
454 "model : %u\n"
455 "revision : %u\n"
456 "archrev : %u\n"
457 "features :%s\n" /* don't change this---it _is_ right! */
458 "cpu number : %lu\n"
459 "cpu regs : %u\n"
460 "cpu MHz : %lu.%06lu\n"
461 "itc MHz : %lu.%06lu\n"
462 "BogoMIPS : %lu.%02lu\n\n",
463 cpunum, c->vendor, family, c->model, c->revision, c->archrev,
464 features, c->ppn, c->number,
465 c->proc_freq / 1000000, c->proc_freq % 1000000,
466 c->itc_freq / 1000000, c->itc_freq % 1000000,
467 lpj*HZ/500000, (lpj*HZ/5000) % 100);
468 return 0;
469}
470
471static void *
472c_start (struct seq_file *m, loff_t *pos)
473{
474#ifdef CONFIG_SMP
475 while (*pos < NR_CPUS && !cpu_isset(*pos, cpu_online_map))
476 ++*pos;
477#endif
478 return *pos < NR_CPUS ? cpu_data(*pos) : NULL;
479}
480
481static void *
482c_next (struct seq_file *m, void *v, loff_t *pos)
483{
484 ++*pos;
485 return c_start(m, pos);
486}
487
488static void
489c_stop (struct seq_file *m, void *v)
490{
491}
492
493struct seq_operations cpuinfo_op = {
494 .start = c_start,
495 .next = c_next,
496 .stop = c_stop,
497 .show = show_cpuinfo
498};
499
500void
501identify_cpu (struct cpuinfo_ia64 *c)
502{
503 union {
504 unsigned long bits[5];
505 struct {
506 /* id 0 & 1: */
507 char vendor[16];
508
509 /* id 2 */
510 u64 ppn; /* processor serial number */
511
512 /* id 3: */
513 unsigned number : 8;
514 unsigned revision : 8;
515 unsigned model : 8;
516 unsigned family : 8;
517 unsigned archrev : 8;
518 unsigned reserved : 24;
519
520 /* id 4: */
521 u64 features;
522 } field;
523 } cpuid;
524 pal_vm_info_1_u_t vm1;
525 pal_vm_info_2_u_t vm2;
526 pal_status_t status;
527 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */
528 int i;
529
530 for (i = 0; i < 5; ++i)
531 cpuid.bits[i] = ia64_get_cpuid(i);
532
533 memcpy(c->vendor, cpuid.field.vendor, 16);
534#ifdef CONFIG_SMP
535 c->cpu = smp_processor_id();
536#endif
537 c->ppn = cpuid.field.ppn;
538 c->number = cpuid.field.number;
539 c->revision = cpuid.field.revision;
540 c->model = cpuid.field.model;
541 c->family = cpuid.field.family;
542 c->archrev = cpuid.field.archrev;
543 c->features = cpuid.field.features;
544
545 status = ia64_pal_vm_summary(&vm1, &vm2);
546 if (status == PAL_STATUS_SUCCESS) {
547 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
548 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
549 }
550 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
551 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
552}
553
554void
555setup_per_cpu_areas (void)
556{
557 /* start_kernel() requires this... */
558}
559
560static void
561get_max_cacheline_size (void)
562{
563 unsigned long line_size, max = 1;
564 u64 l, levels, unique_caches;
565 pal_cache_config_info_t cci;
566 s64 status;
567
568 status = ia64_pal_cache_summary(&levels, &unique_caches);
569 if (status != 0) {
570 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
571 __FUNCTION__, status);
572 max = SMP_CACHE_BYTES;
573 goto out;
574 }
575
576 for (l = 0; l < levels; ++l) {
577 status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2,
578 &cci);
579 if (status != 0) {
580 printk(KERN_ERR
581 "%s: ia64_pal_cache_config_info(l=%lu) failed (status=%ld)\n",
582 __FUNCTION__, l, status);
583 max = SMP_CACHE_BYTES;
584 }
585 line_size = 1 << cci.pcci_line_size;
586 if (line_size > max)
587 max = line_size;
588 }
589 out:
590 if (max > ia64_max_cacheline_size)
591 ia64_max_cacheline_size = max;
592}
593
594/*
595 * cpu_init() initializes state that is per-CPU. This function acts
596 * as a 'CPU state barrier', nothing should get across.
597 */
598void
599cpu_init (void)
600{
601 extern void __devinit ia64_mmu_init (void *);
602 unsigned long num_phys_stacked;
603 pal_vm_info_2_u_t vmi;
604 unsigned int max_ctx;
605 struct cpuinfo_ia64 *cpu_info;
606 void *cpu_data;
607
608 cpu_data = per_cpu_init();
609
610 /*
611 * We set ar.k3 so that assembly code in MCA handler can compute
612 * physical addresses of per cpu variables with a simple:
613 * phys = ar.k3 + &per_cpu_var
614 */
615 ia64_set_kr(IA64_KR_PER_CPU_DATA,
616 ia64_tpa(cpu_data) - (long) __per_cpu_start);
617
618 get_max_cacheline_size();
619
620 /*
621 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
622 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
623 * depends on the data returned by identify_cpu(). We break the dependency by
624 * accessing cpu_data() through the canonical per-CPU address.
625 */
626 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
627 identify_cpu(cpu_info);
628
629#ifdef CONFIG_MCKINLEY
630 {
631# define FEATURE_SET 16
632 struct ia64_pal_retval iprv;
633
634 if (cpu_info->family == 0x1f) {
635 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
636 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
637 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
638 (iprv.v1 | 0x80), FEATURE_SET, 0);
639 }
640 }
641#endif
642
643 /* Clear the stack memory reserved for pt_regs: */
644 memset(ia64_task_regs(current), 0, sizeof(struct pt_regs));
645
646 ia64_set_kr(IA64_KR_FPU_OWNER, 0);
647
648 /*
649 * Initialize the page-table base register to a global
650 * directory with all zeroes. This ensure that we can handle
651 * TLB-misses to user address-space even before we created the
652 * first user address-space. This may happen, e.g., due to
653 * aggressive use of lfetch.fault.
654 */
655 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
656
657 /*
658 * Initialize default control register to defer all speculative faults. The
659 * kernel MUST NOT depend on a particular setting of these bits (in other words,
660 * the kernel must have recovery code for all speculative accesses). Turn on
661 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps
662 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
663 * be fine).
664 */
665 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
666 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
667 atomic_inc(&init_mm.mm_count);
668 current->active_mm = &init_mm;
669 if (current->mm)
670 BUG();
671
672 ia64_mmu_init(ia64_imva(cpu_data));
673 ia64_mca_cpu_init(ia64_imva(cpu_data));
674
675#ifdef CONFIG_IA32_SUPPORT
676 ia32_cpu_init();
677#endif
678
679 /* Clear ITC to eliminiate sched_clock() overflows in human time. */
680 ia64_set_itc(0);
681
682 /* disable all local interrupt sources: */
683 ia64_set_itv(1 << 16);
684 ia64_set_lrr0(1 << 16);
685 ia64_set_lrr1(1 << 16);
686 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
687 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
688
689 /* clear TPR & XTP to enable all interrupt classes: */
690 ia64_setreg(_IA64_REG_CR_TPR, 0);
691#ifdef CONFIG_SMP
692 normal_xtp();
693#endif
694
695 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
696 if (ia64_pal_vm_summary(NULL, &vmi) == 0)
697 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
698 else {
699 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
700 max_ctx = (1U << 15) - 1; /* use architected minimum */
701 }
702 while (max_ctx < ia64_ctx.max_ctx) {
703 unsigned int old = ia64_ctx.max_ctx;
704 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
705 break;
706 }
707
708 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
709 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
710 "stacked regs\n");
711 num_phys_stacked = 96;
712 }
713 /* size of physical stacked register partition plus 8 bytes: */
714 __get_cpu_var(ia64_phys_stacked_size_p8) = num_phys_stacked*8 + 8;
715 platform_cpu_init();
716}
717
718void
719check_bugs (void)
720{
721 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
722 (unsigned long) __end___mckinley_e9_bundles);
723}