blob: 8fb958abf8d008e95259f209d4caf7e53420b009 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Suresh Siddhae927ecb2005-04-25 13:25:06 -07007 * Copyright (C) 2000, 2004 Intel Corp
8 * Rohit Seth <rohit.seth@intel.com>
9 * Suresh Siddha <suresh.b.siddha@intel.com>
10 * Gordon Jin <gordon.jin@intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * Copyright (C) 1999 VA Linux Systems
12 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
13 *
Suresh Siddhae927ecb2005-04-25 13:25:06 -070014 * 12/26/04 S.Siddha, G.Jin, R.Seth
15 * Add multi-threading and multi-core detection
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 * 11/12/01 D.Mosberger Convert get_cpuinfo() to seq_file based show_cpuinfo().
17 * 04/04/00 D.Mosberger renamed cpu_initialized to cpu_online_map
18 * 03/31/00 R.Seth cpu_initialized and current->processor fixes
19 * 02/04/00 D.Mosberger some more get_cpuinfo fixes...
20 * 02/01/00 R.Seth fixed get_cpuinfo for SMP
21 * 01/07/99 S.Eranian added the support for command line argument
22 * 06/24/99 W.Drummond added boot_cpu_data.
Zoltan Menyhart08357f82005-06-03 05:36:00 -070023 * 05/28/05 Z. Menyhart Dynamic stride size for "flush_icache_range()"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/module.h>
26#include <linux/init.h>
27
28#include <linux/acpi.h>
29#include <linux/bootmem.h>
30#include <linux/console.h>
31#include <linux/delay.h>
32#include <linux/kernel.h>
33#include <linux/reboot.h>
34#include <linux/sched.h>
35#include <linux/seq_file.h>
36#include <linux/string.h>
37#include <linux/threads.h>
Jon Smirl894673e2006-07-10 04:44:13 -070038#include <linux/screen_info.h>
Matt Domsch3ed3bce2006-03-26 01:37:03 -080039#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/serial.h>
41#include <linux/serial_core.h>
42#include <linux/efi.h>
43#include <linux/initrd.h>
Venkatesh Pallipadi6c4fa562005-04-18 23:06:47 -040044#include <linux/pm.h>
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -080045#include <linux/cpufreq.h>
Zou Nan haia79561132006-12-07 09:51:35 -080046#include <linux/kexec.h>
47#include <linux/crash_dump.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <asm/machvec.h>
50#include <asm/mca.h>
51#include <asm/meminit.h>
52#include <asm/page.h>
Isaku Yamahatae51835d2008-05-19 22:13:41 +090053#include <asm/paravirt.h>
Isaku Yamahata03f511d2009-03-04 21:06:52 +090054#include <asm/paravirt_patch.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <asm/patch.h>
56#include <asm/pgtable.h>
57#include <asm/processor.h>
58#include <asm/sal.h>
59#include <asm/sections.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <asm/setup.h>
61#include <asm/smp.h>
62#include <asm/system.h>
Fenghua Yu2046b942008-04-04 11:05:59 -070063#include <asm/tlbflush.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <asm/unistd.h>
Peter Chubb8b713c62007-08-21 13:51:45 +100065#include <asm/hpsim.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67#if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
68# error "struct cpuinfo_ia64 too big!"
69#endif
70
71#ifdef CONFIG_SMP
72unsigned long __per_cpu_offset[NR_CPUS];
73EXPORT_SYMBOL(__per_cpu_offset);
74#endif
75
Tejun Heo877105c2009-10-29 22:34:14 +090076DEFINE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078unsigned long ia64_cycles_per_usec;
79struct ia64_boot_param *ia64_boot_param;
80struct screen_info screen_info;
Mark Maule66b7f8a2005-04-25 13:51:00 -070081unsigned long vga_console_iobase;
82unsigned long vga_console_membase;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Khalid Azizbe379122005-09-19 15:42:36 -070084static struct resource data_resource = {
85 .name = "Kernel data",
86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
87};
88
89static struct resource code_resource = {
90 .name = "Kernel code",
91 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
92};
Bernhard Walle00bf4092007-10-21 16:42:01 -070093
94static struct resource bss_resource = {
95 .name = "Kernel bss",
96 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
97};
Khalid Azizbe379122005-09-19 15:42:36 -070098
Linus Torvalds1da177e2005-04-16 15:20:36 -070099unsigned long ia64_max_cacheline_size;
John W. Linvillee1531b42005-11-07 00:57:54 -0800100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101unsigned long ia64_iobase; /* virtual address for I/O accesses */
102EXPORT_SYMBOL(ia64_iobase);
103struct io_space io_space[MAX_IO_SPACES];
104EXPORT_SYMBOL(io_space);
105unsigned int num_io_spaces;
106
107/*
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700108 * "flush_icache_range()" needs to know what processor dependent stride size to use
109 * when it makes i-cache(s) coherent with d-caches.
110 */
111#define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */
112unsigned long ia64_i_cache_stride_shift = ~0;
Fenghua Yu62fdd762008-10-17 12:14:13 -0700113/*
114 * "clflush_cache_range()" needs to know what processor dependent stride size to
115 * use when it flushes cache lines including both d-cache and i-cache.
116 */
117/* Safest way to go: 32 bytes by 32 bytes */
118#define CACHE_STRIDE_SHIFT 5
119unsigned long ia64_cache_stride_shift = ~0;
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700120
121/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This
123 * mask specifies a mask of address bits that must be 0 in order for two buffers to be
124 * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start
125 * address of the second buffer must be aligned to (merge_mask+1) in order to be
126 * mergeable). By default, we assume there is no I/O MMU which can merge physically
127 * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu
128 * page-size of 2^64.
129 */
130unsigned long ia64_max_iommu_merge_mask = ~0UL;
131EXPORT_SYMBOL(ia64_max_iommu_merge_mask);
132
133/*
134 * We use a special marker for the end of memory and it uses the extra (+1) slot
135 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800136struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
137int num_rsvd_regions __initdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139
140/*
141 * Filter incoming memory segments based on the primitive map created from the boot
142 * parameters. Segments contained in the map are removed from the memory ranges. A
143 * caller-specified function is called with the memory ranges that remain after filtering.
144 * This routine does not assume the incoming segments are sorted.
145 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800146int __init
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700147filter_rsvd_memory (u64 start, u64 end, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700149 u64 range_start, range_end, prev_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 void (*func)(unsigned long, unsigned long, int);
151 int i;
152
153#if IGNORE_PFN0
154 if (start == PAGE_OFFSET) {
155 printk(KERN_WARNING "warning: skipping physical page 0\n");
156 start += PAGE_SIZE;
157 if (start >= end) return 0;
158 }
159#endif
160 /*
161 * lowest possible address(walker uses virtual)
162 */
163 prev_start = PAGE_OFFSET;
164 func = arg;
165
166 for (i = 0; i < num_rsvd_regions; ++i) {
167 range_start = max(start, prev_start);
168 range_end = min(end, rsvd_region[i].start);
169
170 if (range_start < range_end)
171 call_pernode_memory(__pa(range_start), range_end - range_start, func);
172
173 /* nothing more available in this segment */
174 if (range_end == end) return 0;
175
176 prev_start = rsvd_region[i].end;
177 }
178 /* end of memory marker allows full processing inside loop body */
179 return 0;
180}
181
Zoltan Menyhart98075d22008-04-11 15:21:35 -0700182/*
183 * Similar to "filter_rsvd_memory()", but the reserved memory ranges
184 * are not filtered out.
185 */
186int __init
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700187filter_memory(u64 start, u64 end, void *arg)
Zoltan Menyhart98075d22008-04-11 15:21:35 -0700188{
189 void (*func)(unsigned long, unsigned long, int);
190
191#if IGNORE_PFN0
192 if (start == PAGE_OFFSET) {
193 printk(KERN_WARNING "warning: skipping physical page 0\n");
194 start += PAGE_SIZE;
195 if (start >= end)
196 return 0;
197 }
198#endif
199 func = arg;
200 if (start < end)
201 call_pernode_memory(__pa(start), end - start, func);
202 return 0;
203}
204
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800205static void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206sort_regions (struct rsvd_region *rsvd_region, int max)
207{
208 int j;
209
210 /* simple bubble sorting */
211 while (max--) {
212 for (j = 0; j < max; ++j) {
213 if (rsvd_region[j].start > rsvd_region[j+1].start) {
214 struct rsvd_region tmp;
215 tmp = rsvd_region[j];
216 rsvd_region[j] = rsvd_region[j + 1];
217 rsvd_region[j + 1] = tmp;
218 }
219 }
220 }
221}
222
Khalid Azizbe379122005-09-19 15:42:36 -0700223/*
224 * Request address space for all standard resources
225 */
226static int __init register_memory(void)
227{
228 code_resource.start = ia64_tpa(_text);
229 code_resource.end = ia64_tpa(_etext) - 1;
230 data_resource.start = ia64_tpa(_etext);
Bernhard Walle00bf4092007-10-21 16:42:01 -0700231 data_resource.end = ia64_tpa(_edata) - 1;
Bernhard Walleb898a422007-11-21 14:58:25 -0800232 bss_resource.start = ia64_tpa(__bss_start);
Bernhard Walle00bf4092007-10-21 16:42:01 -0700233 bss_resource.end = ia64_tpa(_end) - 1;
234 efi_initialize_iomem_resources(&code_resource, &data_resource,
235 &bss_resource);
Khalid Azizbe379122005-09-19 15:42:36 -0700236
237 return 0;
238}
239
240__initcall(register_memory);
241
Bernhard Wallecb380852007-10-18 23:41:00 -0700242
243#ifdef CONFIG_KEXEC
Bernhard Walle8a3360f2008-05-14 15:40:40 -0700244
245/*
246 * This function checks if the reserved crashkernel is allowed on the specific
247 * IA64 machine flavour. Machines without an IO TLB use swiotlb and require
248 * some memory below 4 GB (i.e. in 32 bit area), see the implementation of
249 * lib/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that
250 * in kdump case. See the comment in sba_init() in sba_iommu.c.
251 *
252 * So, the only machvec that really supports loading the kdump kernel
253 * over 4 GB is "sn2".
254 */
255static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
256{
257 if (ia64_platform_is("sn2") || ia64_platform_is("uv"))
258 return 1;
259 else
260 return pbase < (1UL << 32);
261}
262
Bernhard Wallecb380852007-10-18 23:41:00 -0700263static void __init setup_crashkernel(unsigned long total, int *n)
264{
265 unsigned long long base = 0, size = 0;
266 int ret;
267
268 ret = parse_crashkernel(boot_command_line, total,
269 &size, &base);
270 if (ret == 0 && size > 0) {
271 if (!base) {
272 sort_regions(rsvd_region, *n);
273 base = kdump_find_rsvd_region(size,
274 rsvd_region, *n);
275 }
Bernhard Walle8a3360f2008-05-14 15:40:40 -0700276
277 if (!check_crashkernel_memory(base, size)) {
278 pr_warning("crashkernel: There would be kdump memory "
279 "at %ld GB but this is unusable because it "
280 "must\nbe below 4 GB. Change the memory "
281 "configuration of the machine.\n",
282 (unsigned long)(base >> 30));
283 return;
284 }
285
Bernhard Wallecb380852007-10-18 23:41:00 -0700286 if (base != ~0UL) {
287 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
288 "for crashkernel (System RAM: %ldMB)\n",
289 (unsigned long)(size >> 20),
290 (unsigned long)(base >> 20),
291 (unsigned long)(total >> 20));
292 rsvd_region[*n].start =
293 (unsigned long)__va(base);
294 rsvd_region[*n].end =
295 (unsigned long)__va(base + size);
296 (*n)++;
297 crashk_res.start = base;
298 crashk_res.end = base + size - 1;
299 }
300 }
301 efi_memmap_res.start = ia64_boot_param->efi_memmap;
302 efi_memmap_res.end = efi_memmap_res.start +
303 ia64_boot_param->efi_memmap_size;
304 boot_param_res.start = __pa(ia64_boot_param);
305 boot_param_res.end = boot_param_res.start +
306 sizeof(*ia64_boot_param);
307}
308#else
309static inline void __init setup_crashkernel(unsigned long total, int *n)
310{}
311#endif
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313/**
314 * reserve_memory - setup reserved memory areas
315 *
316 * Setup the reserved memory areas set aside for the boot parameters,
317 * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
Tony Luck7f304912008-08-01 10:13:32 -0700318 * see arch/ia64/include/asm/meminit.h if you need to define more.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800320void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321reserve_memory (void)
322{
323 int n = 0;
Bernhard Wallecb380852007-10-18 23:41:00 -0700324 unsigned long total_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326 /*
327 * none of the entries in this table overlap
328 */
329 rsvd_region[n].start = (unsigned long) ia64_boot_param;
330 rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
331 n++;
332
333 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
334 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
335 n++;
336
337 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
338 rsvd_region[n].end = (rsvd_region[n].start
339 + strlen(__va(ia64_boot_param->command_line)) + 1);
340 n++;
341
342 rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
343 rsvd_region[n].end = (unsigned long) ia64_imva(_end);
344 n++;
345
Isaku Yamahatae51835d2008-05-19 22:13:41 +0900346 n += paravirt_reserve_memory(&rsvd_region[n]);
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348#ifdef CONFIG_BLK_DEV_INITRD
349 if (ia64_boot_param->initrd_start) {
350 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
351 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
352 n++;
353 }
354#endif
355
Jay Lan17c1f072008-11-07 09:51:55 -0800356#ifdef CONFIG_CRASH_DUMP
Magnus Dammcee87af2007-03-06 02:34:26 -0800357 if (reserve_elfcorehdr(&rsvd_region[n].start,
358 &rsvd_region[n].end) == 0)
359 n++;
360#endif
361
Bernhard Wallecb380852007-10-18 23:41:00 -0700362 total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
Tony Luckd8c97d52005-09-08 12:39:59 -0700363 n++;
364
Bernhard Wallecb380852007-10-18 23:41:00 -0700365 setup_crashkernel(total_memory, &n);
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 /* end of memory marker */
368 rsvd_region[n].start = ~0UL;
369 rsvd_region[n].end = ~0UL;
370 n++;
371
372 num_rsvd_regions = n;
Alex Williamson5eb1d632006-06-06 10:36:27 -0600373 BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375 sort_regions(rsvd_region, num_rsvd_regions);
376}
377
Zou Nan haia79561132006-12-07 09:51:35 -0800378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379/**
380 * find_initrd - get initrd parameters from the boot parameter structure
381 *
382 * Grab the initrd start and end from the boot parameter struct given us by
383 * the boot loader.
384 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800385void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386find_initrd (void)
387{
388#ifdef CONFIG_BLK_DEV_INITRD
389 if (ia64_boot_param->initrd_start) {
390 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
391 initrd_end = initrd_start+ia64_boot_param->initrd_size;
392
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700393 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%llu bytes)\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 initrd_start, ia64_boot_param->initrd_size);
395 }
396#endif
397}
398
399static void __init
400io_port_init (void)
401{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 unsigned long phys_iobase;
403
404 /*
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600405 * Set `iobase' based on the EFI memory map or, failing that, the
406 * value firmware left in ar.k0.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 *
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600408 * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
409 * the port's virtual address, so ia32_load_state() loads it with a
410 * user virtual address. But in ia64 mode, glibc uses the
411 * *physical* address in ar.k0 to mmap the appropriate area from
412 * /dev/mem, and the inX()/outX() interfaces use MMIO. In both
413 * cases, user-mode can only use the legacy 0-64K I/O port space.
414 *
415 * ar.k0 is not involved in kernel I/O port accesses, which can use
416 * any of the I/O port spaces and are done via MMIO using the
417 * virtual mmio_base from the appropriate io_space[].
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 */
419 phys_iobase = efi_get_iobase();
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600420 if (!phys_iobase) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600422 printk(KERN_INFO "No I/O port range found in EFI memory map, "
423 "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 }
425 ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600426 ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
428 /* setup legacy IO port space */
429 io_space[0].mmio_base = ia64_iobase;
430 io_space[0].sparse = 1;
431 num_io_spaces = 1;
432}
433
434/**
435 * early_console_setup - setup debugging console
436 *
437 * Consoles started here require little enough setup that we can start using
438 * them very early in the boot process, either right after the machine
439 * vector initialization, or even before if the drivers can detect their hw.
440 *
441 * Returns non-zero if a console couldn't be setup.
442 */
443static inline int __init
444early_console_setup (char *cmdline)
445{
Mark Maule66b7f8a2005-04-25 13:51:00 -0700446 int earlycons = 0;
447
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
449 {
450 extern int sn_serial_console_early_setup(void);
451 if (!sn_serial_console_early_setup())
Mark Maule66b7f8a2005-04-25 13:51:00 -0700452 earlycons++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 }
454#endif
455#ifdef CONFIG_EFI_PCDP
456 if (!efi_setup_pcdp_console(cmdline))
Mark Maule66b7f8a2005-04-25 13:51:00 -0700457 earlycons++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458#endif
Peter Chubb8b713c62007-08-21 13:51:45 +1000459 if (!simcons_register())
Peter Chubb471e7a42007-08-16 15:03:07 +1000460 earlycons++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Mark Maule66b7f8a2005-04-25 13:51:00 -0700462 return (earlycons) ? 0 : -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463}
464
465static inline void
466mark_bsp_online (void)
467{
468#ifdef CONFIG_SMP
469 /* If we register an early console, allow CPU 0 to printk */
470 cpu_set(smp_processor_id(), cpu_online_map);
471#endif
472}
473
Hormsa5b00bb2006-03-23 14:27:12 -0800474static __initdata int nomca;
475static __init int setup_nomca(char *s)
476{
477 nomca = 1;
478 return 0;
479}
480early_param("nomca", setup_nomca);
481
Vivek Goyal57cac4d2008-10-18 20:28:25 -0700482/*
483 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
484 * is_kdump_kernel() to determine if we are booting after a panic. Hence
485 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
486 */
487#ifdef CONFIG_CRASH_DUMP
Horms45a98fc2006-12-12 17:49:03 +0900488/* elfcorehdr= specifies the location of elf core header
489 * stored by the crashed kernel.
490 */
491static int __init parse_elfcorehdr(char *arg)
492{
493 if (!arg)
494 return -EINVAL;
495
496 elfcorehdr_addr = memparse(arg, &arg);
497 return 0;
498}
499early_param("elfcorehdr", parse_elfcorehdr);
Magnus Dammcee87af2007-03-06 02:34:26 -0800500
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700501int __init reserve_elfcorehdr(u64 *start, u64 *end)
Magnus Dammcee87af2007-03-06 02:34:26 -0800502{
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700503 u64 length;
Magnus Dammcee87af2007-03-06 02:34:26 -0800504
505 /* We get the address using the kernel command line,
506 * but the size is extracted from the EFI tables.
507 * Both address and size are required for reservation
508 * to work properly.
509 */
510
Simon Horman85a0ee32008-10-18 20:28:29 -0700511 if (!is_vmcore_usable())
Magnus Dammcee87af2007-03-06 02:34:26 -0800512 return -EINVAL;
513
514 if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
Simon Horman85a0ee32008-10-18 20:28:29 -0700515 vmcore_unusable();
Magnus Dammcee87af2007-03-06 02:34:26 -0800516 return -EINVAL;
517 }
518
519 *start = (unsigned long)__va(elfcorehdr_addr);
520 *end = *start + length;
521 return 0;
522}
523
Horms45a98fc2006-12-12 17:49:03 +0900524#endif /* CONFIG_PROC_VMCORE */
525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526void __init
527setup_arch (char **cmdline_p)
528{
529 unw_init();
530
Isaku Yamahatae51835d2008-05-19 22:13:41 +0900531 paravirt_arch_setup_early();
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
Isaku Yamahata03f511d2009-03-04 21:06:52 +0900534 paravirt_patch_apply();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
536 *cmdline_p = __va(ia64_boot_param->command_line);
Alon Bar-Leva8d91b82007-02-12 00:54:12 -0800537 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
539 efi_init();
540 io_port_init();
541
542#ifdef CONFIG_IA64_GENERIC
Hormsa07ee862007-07-25 16:06:25 +0900543 /* machvec needs to be parsed from the command line
544 * before parse_early_param() is called to ensure
545 * that ia64_mv is initialised before any command line
546 * settings may cause console setup to occur
547 */
548 machvec_init_from_cmdline(*cmdline_p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549#endif
550
Hormsa07ee862007-07-25 16:06:25 +0900551 parse_early_param();
552
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 if (early_console_setup(*cmdline_p) == 0)
554 mark_bsp_online();
555
Len Brown888ba6c2005-08-24 12:07:20 -0400556#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 /* Initialize the ACPI boot-time table parser */
558 acpi_table_init();
Doug Chapman62ee0542008-11-05 17:57:52 -0500559 early_acpi_boot_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560# ifdef CONFIG_ACPI_NUMA
561 acpi_numa_init();
Tejun Heo12cda812009-10-02 13:28:56 +0900562# ifdef CONFIG_ACPI_HOTPLUG_CPU
Doug Chapman62ee0542008-11-05 17:57:52 -0500563 prefill_possible_map();
Tejun Heo12cda812009-10-02 13:28:56 +0900564# endif
holt@sgi.com2c6e6db2008-04-03 15:17:13 -0500565 per_cpu_scan_finalize((cpus_weight(early_cpu_possible_map) == 0 ?
Tony Luckdd4f0882008-06-30 15:03:14 -0700566 32 : cpus_weight(early_cpu_possible_map)),
567 additional_cpus > 0 ? additional_cpus : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568# endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569#endif /* CONFIG_APCI_BOOT */
570
Tejun Heo12cda812009-10-02 13:28:56 +0900571#ifdef CONFIG_SMP
572 smp_build_cpu_map();
573#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 find_memory();
575
576 /* process SAL system table: */
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800577 ia64_sal_init(__va(efi.sal_systab));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Tony Luck4dcc29e2008-05-27 13:23:16 -0700579#ifdef CONFIG_ITANIUM
580 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
581#else
582 {
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700583 unsigned long num_phys_stacked;
Tony Luck4dcc29e2008-05-27 13:23:16 -0700584
585 if (ia64_pal_rse_info(&num_phys_stacked, 0) == 0 && num_phys_stacked > 96)
586 ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
587 }
588#endif
589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590#ifdef CONFIG_SMP
591 cpu_physical_id(0) = hard_smp_processor_id();
592#endif
593
594 cpu_init(); /* initialize the bootstrap CPU */
Peter Keiltydcc17d12005-10-31 16:44:47 -0500595 mmu_context_init(); /* initialize context_id bitmap */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
Len Brown888ba6c2005-08-24 12:07:20 -0400597#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 acpi_boot_init();
599#endif
600
Isaku Yamahatae51835d2008-05-19 22:13:41 +0900601 paravirt_banner();
602 paravirt_arch_setup_console(cmdline_p);
603
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604#ifdef CONFIG_VT
605 if (!conswitchp) {
606# if defined(CONFIG_DUMMY_CONSOLE)
607 conswitchp = &dummy_con;
608# endif
609# if defined(CONFIG_VGA_CONSOLE)
610 /*
611 * Non-legacy systems may route legacy VGA MMIO range to system
612 * memory. vga_con probes the MMIO hole, so memory looks like
613 * a VGA device to it. The EFI memory map can tell us if it's
614 * memory so we can avoid this problem.
615 */
616 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
617 conswitchp = &vga_con;
618# endif
619 }
620#endif
621
622 /* enable IA-64 Machine Check Abort Handling unless disabled */
Isaku Yamahatae51835d2008-05-19 22:13:41 +0900623 if (paravirt_arch_setup_nomca())
624 nomca = 1;
Hormsa5b00bb2006-03-23 14:27:12 -0800625 if (!nomca)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 ia64_mca_init();
627
628 platform_setup(cmdline_p);
Alex Chiang06f95ea2008-09-16 18:25:33 -0600629#ifndef CONFIG_IA64_HP_SIM
Jes Sorensen2826f8c2008-06-24 11:30:09 -0400630 check_sal_cache_flush();
Alex Chiang06f95ea2008-09-16 18:25:33 -0600631#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 paging_init();
633}
634
635/*
Simon Arlott72fdbdc2007-05-11 14:55:43 -0700636 * Display cpu info for all CPUs.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 */
638static int
639show_cpuinfo (struct seq_file *m, void *v)
640{
641#ifdef CONFIG_SMP
642# define lpj c->loops_per_jiffy
643# define cpunum c->cpu
644#else
645# define lpj loops_per_jiffy
646# define cpunum 0
647#endif
648 static struct {
649 unsigned long mask;
650 const char *feature_name;
651 } feature_bits[] = {
652 { 1UL << 0, "branchlong" },
653 { 1UL << 1, "spontaneous deferral"},
654 { 1UL << 2, "16-byte atomic ops" }
655 };
Aron Griffisae0af3e2007-02-05 13:54:31 -0800656 char features[128], *cp, *sep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 struct cpuinfo_ia64 *c = v;
658 unsigned long mask;
Tony Luck38c0b2c2006-01-05 13:30:52 -0800659 unsigned long proc_freq;
Aron Griffisae0af3e2007-02-05 13:54:31 -0800660 int i, size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
662 mask = c->features;
663
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 /* build the feature string: */
Aron Griffisae0af3e2007-02-05 13:54:31 -0800665 memcpy(features, "standard", 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 cp = features;
Aron Griffisae0af3e2007-02-05 13:54:31 -0800667 size = sizeof(features);
668 sep = "";
669 for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 if (mask & feature_bits[i].mask) {
Aron Griffisae0af3e2007-02-05 13:54:31 -0800671 cp += snprintf(cp, size, "%s%s", sep,
672 feature_bits[i].feature_name),
673 sep = ", ";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 mask &= ~feature_bits[i].mask;
Aron Griffisae0af3e2007-02-05 13:54:31 -0800675 size = sizeof(features) - (cp - features);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 }
677 }
Aron Griffisae0af3e2007-02-05 13:54:31 -0800678 if (mask && size > 1) {
679 /* print unknown features as a hex value */
680 snprintf(cp, size, "%s0x%lx", sep, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 }
682
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -0800683 proc_freq = cpufreq_quick_get(cpunum);
684 if (!proc_freq)
685 proc_freq = c->proc_freq / 1000;
686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 seq_printf(m,
688 "processor : %d\n"
689 "vendor : %s\n"
690 "arch : IA-64\n"
Tony Luck76d08bb2006-06-05 13:54:14 -0700691 "family : %u\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 "model : %u\n"
Tony Luck76d08bb2006-06-05 13:54:14 -0700693 "model name : %s\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 "revision : %u\n"
695 "archrev : %u\n"
Aron Griffisae0af3e2007-02-05 13:54:31 -0800696 "features : %s\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 "cpu number : %lu\n"
698 "cpu regs : %u\n"
Venki Pallipadi8a3a78d2007-04-06 10:04:49 -0700699 "cpu MHz : %lu.%03lu\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 "itc MHz : %lu.%06lu\n"
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700701 "BogoMIPS : %lu.%02lu\n",
Tony Luck76d08bb2006-06-05 13:54:14 -0700702 cpunum, c->vendor, c->family, c->model,
703 c->model_name, c->revision, c->archrev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 features, c->ppn, c->number,
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -0800705 proc_freq / 1000, proc_freq % 1000,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 c->itc_freq / 1000000, c->itc_freq % 1000000,
707 lpj*HZ/500000, (lpj*HZ/5000) % 100);
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700708#ifdef CONFIG_SMP
Siddha, Suresh Bce6e71a2005-10-04 16:35:31 -0700709 seq_printf(m, "siblings : %u\n", cpus_weight(cpu_core_map[cpunum]));
Alex Chiang113134f2007-10-19 13:20:09 -0600710 if (c->socket_id != -1)
711 seq_printf(m, "physical id: %u\n", c->socket_id);
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700712 if (c->threads_per_core > 1 || c->cores_per_socket > 1)
713 seq_printf(m,
Alex Chiang113134f2007-10-19 13:20:09 -0600714 "core id : %u\n"
715 "thread id : %u\n",
716 c->core_id, c->thread_id);
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700717#endif
718 seq_printf(m,"\n");
719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 return 0;
721}
722
723static void *
724c_start (struct seq_file *m, loff_t *pos)
725{
726#ifdef CONFIG_SMP
Rusty Russell5dd3c992009-03-16 14:12:42 +1030727 while (*pos < nr_cpu_ids && !cpu_online(*pos))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 ++*pos;
729#endif
Rusty Russell5dd3c992009-03-16 14:12:42 +1030730 return *pos < nr_cpu_ids ? cpu_data(*pos) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731}
732
733static void *
734c_next (struct seq_file *m, void *v, loff_t *pos)
735{
736 ++*pos;
737 return c_start(m, pos);
738}
739
740static void
741c_stop (struct seq_file *m, void *v)
742{
743}
744
Jan Engelhardta23fe552008-01-22 20:42:07 +0100745const struct seq_operations cpuinfo_op = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 .start = c_start,
747 .next = c_next,
748 .stop = c_stop,
749 .show = show_cpuinfo
750};
751
Jack Steinerc5e83e32007-03-12 08:07:49 -0500752#define MAX_BRANDS 8
753static char brandname[MAX_BRANDS][128];
Tony Luck76d08bb2006-06-05 13:54:14 -0700754
755static char * __cpuinit
756get_model_name(__u8 family, __u8 model)
757{
Jack Steinerc5e83e32007-03-12 08:07:49 -0500758 static int overflow;
Tony Luck76d08bb2006-06-05 13:54:14 -0700759 char brand[128];
Jack Steinerc5e83e32007-03-12 08:07:49 -0500760 int i;
Tony Luck76d08bb2006-06-05 13:54:14 -0700761
Tony Luck75f6a1d2006-12-12 11:56:36 -0800762 memcpy(brand, "Unknown", 8);
Tony Luck76d08bb2006-06-05 13:54:14 -0700763 if (ia64_pal_get_brand_info(brand)) {
764 if (family == 0x7)
765 memcpy(brand, "Merced", 7);
766 else if (family == 0x1f) switch (model) {
767 case 0: memcpy(brand, "McKinley", 9); break;
768 case 1: memcpy(brand, "Madison", 8); break;
769 case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
Tony Luck75f6a1d2006-12-12 11:56:36 -0800770 }
Tony Luck76d08bb2006-06-05 13:54:14 -0700771 }
Jack Steinerc5e83e32007-03-12 08:07:49 -0500772 for (i = 0; i < MAX_BRANDS; i++)
773 if (strcmp(brandname[i], brand) == 0)
774 return brandname[i];
775 for (i = 0; i < MAX_BRANDS; i++)
776 if (brandname[i][0] == '\0')
777 return strcpy(brandname[i], brand);
778 if (overflow++ == 0)
779 printk(KERN_ERR
780 "%s: Table overflow. Some processor model information will be missing\n",
Harvey Harrisond4ed8082008-03-04 15:15:00 -0800781 __func__);
Jack Steinerc5e83e32007-03-12 08:07:49 -0500782 return "Unknown";
Tony Luck76d08bb2006-06-05 13:54:14 -0700783}
784
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800785static void __cpuinit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786identify_cpu (struct cpuinfo_ia64 *c)
787{
788 union {
789 unsigned long bits[5];
790 struct {
791 /* id 0 & 1: */
792 char vendor[16];
793
794 /* id 2 */
795 u64 ppn; /* processor serial number */
796
797 /* id 3: */
798 unsigned number : 8;
799 unsigned revision : 8;
800 unsigned model : 8;
801 unsigned family : 8;
802 unsigned archrev : 8;
803 unsigned reserved : 24;
804
805 /* id 4: */
806 u64 features;
807 } field;
808 } cpuid;
809 pal_vm_info_1_u_t vm1;
810 pal_vm_info_2_u_t vm2;
811 pal_status_t status;
812 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */
813 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 for (i = 0; i < 5; ++i)
815 cpuid.bits[i] = ia64_get_cpuid(i);
816
817 memcpy(c->vendor, cpuid.field.vendor, 16);
818#ifdef CONFIG_SMP
819 c->cpu = smp_processor_id();
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700820
821 /* below default values will be overwritten by identify_siblings()
Simon Arlott72fdbdc2007-05-11 14:55:43 -0700822 * for Multi-Threading/Multi-Core capable CPUs
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700823 */
824 c->threads_per_core = c->cores_per_socket = c->num_log = 1;
825 c->socket_id = -1;
826
827 identify_siblings(c);
Alex Chiang113134f2007-10-19 13:20:09 -0600828
829 if (c->threads_per_core > smp_num_siblings)
830 smp_num_siblings = c->threads_per_core;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831#endif
832 c->ppn = cpuid.field.ppn;
833 c->number = cpuid.field.number;
834 c->revision = cpuid.field.revision;
835 c->model = cpuid.field.model;
836 c->family = cpuid.field.family;
837 c->archrev = cpuid.field.archrev;
838 c->features = cpuid.field.features;
Tony Luck76d08bb2006-06-05 13:54:14 -0700839 c->model_name = get_model_name(c->family, c->model);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
841 status = ia64_pal_vm_summary(&vm1, &vm2);
842 if (status == PAL_STATUS_SUCCESS) {
843 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
844 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
845 }
846 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
847 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
848}
849
Fenghua Yu872fb6d2009-07-13 13:09:43 -0700850/*
Fenghua Yu62fdd762008-10-17 12:14:13 -0700851 * Do the following calculations:
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700852 *
Fenghua Yu62fdd762008-10-17 12:14:13 -0700853 * 1. the max. cache line size.
854 * 2. the minimum of the i-cache stride sizes for "flush_icache_range()".
855 * 3. the minimum of the cache stride sizes for "clflush_cache_range()".
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700856 */
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800857static void __cpuinit
Fenghua Yu62fdd762008-10-17 12:14:13 -0700858get_cache_info(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859{
860 unsigned long line_size, max = 1;
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700861 unsigned long l, levels, unique_caches;
862 pal_cache_config_info_t cci;
863 long status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
865 status = ia64_pal_cache_summary(&levels, &unique_caches);
866 if (status != 0) {
867 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
Harvey Harrisond4ed8082008-03-04 15:15:00 -0800868 __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 max = SMP_CACHE_BYTES;
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700870 /* Safest setup for "flush_icache_range()" */
871 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
Fenghua Yu62fdd762008-10-17 12:14:13 -0700872 /* Safest setup for "clflush_cache_range()" */
873 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 goto out;
875 }
876
877 for (l = 0; l < levels; ++l) {
Fenghua Yu62fdd762008-10-17 12:14:13 -0700878 /* cache_type (data_or_unified)=2 */
879 status = ia64_pal_cache_config_info(l, 2, &cci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 if (status != 0) {
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700881 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
882 "(l=%lu, 2) failed (status=%ld)\n",
883 __func__, l, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 max = SMP_CACHE_BYTES;
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700885 /* The safest setup for "flush_icache_range()" */
886 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
Fenghua Yu62fdd762008-10-17 12:14:13 -0700887 /* The safest setup for "clflush_cache_range()" */
888 ia64_cache_stride_shift = CACHE_STRIDE_SHIFT;
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700889 cci.pcci_unified = 1;
Fenghua Yu62fdd762008-10-17 12:14:13 -0700890 } else {
891 if (cci.pcci_stride < ia64_cache_stride_shift)
892 ia64_cache_stride_shift = cci.pcci_stride;
893
894 line_size = 1 << cci.pcci_line_size;
895 if (line_size > max)
896 max = line_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 }
Fenghua Yu62fdd762008-10-17 12:14:13 -0700898
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700899 if (!cci.pcci_unified) {
Fenghua Yu62fdd762008-10-17 12:14:13 -0700900 /* cache_type (instruction)=1*/
901 status = ia64_pal_cache_config_info(l, 1, &cci);
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700902 if (status != 0) {
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700903 printk(KERN_ERR "%s: ia64_pal_cache_config_info"
904 "(l=%lu, 1) failed (status=%ld)\n",
Harvey Harrisond4ed8082008-03-04 15:15:00 -0800905 __func__, l, status);
Matthew Wilcoxe088a4a2009-05-22 13:49:49 -0700906 /* The safest setup for flush_icache_range() */
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700907 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
908 }
909 }
910 if (cci.pcci_stride < ia64_i_cache_stride_shift)
911 ia64_i_cache_stride_shift = cci.pcci_stride;
912 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 out:
914 if (max > ia64_max_cacheline_size)
915 ia64_max_cacheline_size = max;
916}
917
918/*
919 * cpu_init() initializes state that is per-CPU. This function acts
920 * as a 'CPU state barrier', nothing should get across.
921 */
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800922void __cpuinit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923cpu_init (void)
924{
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800925 extern void __cpuinit ia64_mmu_init (void *);
Chen, Kenneth Wa0776ec2006-10-13 10:05:45 -0700926 static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 unsigned long num_phys_stacked;
928 pal_vm_info_2_u_t vmi;
929 unsigned int max_ctx;
930 struct cpuinfo_ia64 *cpu_info;
931 void *cpu_data;
932
933 cpu_data = per_cpu_init();
Tony Luck4d1efed2007-10-16 13:17:22 -0700934#ifdef CONFIG_SMP
Mike Travisd5a74302007-10-16 01:24:05 -0700935 /*
936 * insert boot cpu into sibling and core mapes
937 * (must be done after per_cpu area is setup)
938 */
939 if (smp_processor_id() == 0) {
940 cpu_set(0, per_cpu(cpu_sibling_map, 0));
941 cpu_set(0, cpu_core_map[0]);
Tony Luck10617bb2008-08-12 10:34:20 -0700942 } else {
943 /*
944 * Set ar.k3 so that assembly code in MCA handler can compute
945 * physical addresses of per cpu variables with a simple:
946 * phys = ar.k3 + &per_cpu_var
947 * and the alt-dtlb-miss handler can set per-cpu mapping into
948 * the TLB when needed. head.S already did this for cpu0.
949 */
950 ia64_set_kr(IA64_KR_PER_CPU_DATA,
951 ia64_tpa(cpu_data) - (long) __per_cpu_start);
Mike Travisd5a74302007-10-16 01:24:05 -0700952 }
Tony Luck4d1efed2007-10-16 13:17:22 -0700953#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
Fenghua Yu62fdd762008-10-17 12:14:13 -0700955 get_cache_info();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956
957 /*
958 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
959 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
960 * depends on the data returned by identify_cpu(). We break the dependency by
961 * accessing cpu_data() through the canonical per-CPU address.
962 */
Tejun Heo877105c2009-10-29 22:34:14 +0900963 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 identify_cpu(cpu_info);
965
966#ifdef CONFIG_MCKINLEY
967 {
968# define FEATURE_SET 16
969 struct ia64_pal_retval iprv;
970
971 if (cpu_info->family == 0x1f) {
972 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
973 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
974 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
975 (iprv.v1 | 0x80), FEATURE_SET, 0);
976 }
977 }
978#endif
979
980 /* Clear the stack memory reserved for pt_regs: */
Al Viro64505782006-01-12 01:06:06 -0800981 memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
983 ia64_set_kr(IA64_KR_FPU_OWNER, 0);
984
985 /*
986 * Initialize the page-table base register to a global
987 * directory with all zeroes. This ensure that we can handle
988 * TLB-misses to user address-space even before we created the
989 * first user address-space. This may happen, e.g., due to
990 * aggressive use of lfetch.fault.
991 */
992 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
993
994 /*
Tony Luck86ebacd2005-06-08 12:12:48 -0700995 * Initialize default control register to defer speculative faults except
996 * for those arising from TLB misses, which are not deferred. The
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 * kernel MUST NOT depend on a particular setting of these bits (in other words,
998 * the kernel must have recovery code for all speculative accesses). Turn on
999 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps
1000 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
1001 * be fine).
1002 */
1003 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
1004 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
1005 atomic_inc(&init_mm.mm_count);
1006 current->active_mm = &init_mm;
Stoyan Gaydarov80a03e22009-03-10 00:10:30 -05001007 BUG_ON(current->mm);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008
1009 ia64_mmu_init(ia64_imva(cpu_data));
1010 ia64_mca_cpu_init(ia64_imva(cpu_data));
1011
Simon Arlott72fdbdc2007-05-11 14:55:43 -07001012 /* Clear ITC to eliminate sched_clock() overflows in human time. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 ia64_set_itc(0);
1014
1015 /* disable all local interrupt sources: */
1016 ia64_set_itv(1 << 16);
1017 ia64_set_lrr0(1 << 16);
1018 ia64_set_lrr1(1 << 16);
1019 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
1020 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
1021
1022 /* clear TPR & XTP to enable all interrupt classes: */
1023 ia64_setreg(_IA64_REG_CR_TPR, 0);
Kenji Kaneshigef740e6c92007-08-22 19:53:30 +09001024
1025 /* Clear any pending interrupts left by SAL/EFI */
1026 while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
1027 ia64_eoi();
1028
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029#ifdef CONFIG_SMP
1030 normal_xtp();
1031#endif
1032
1033 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
Fenghua Yu2046b942008-04-04 11:05:59 -07001034 if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
Fenghua Yua6c75b862008-03-14 13:57:08 -07001036 setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
Fenghua Yu2046b942008-04-04 11:05:59 -07001037 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
1039 max_ctx = (1U << 15) - 1; /* use architected minimum */
1040 }
1041 while (max_ctx < ia64_ctx.max_ctx) {
1042 unsigned int old = ia64_ctx.max_ctx;
1043 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
1044 break;
1045 }
1046
1047 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
1048 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
1049 "stacked regs\n");
1050 num_phys_stacked = 96;
1051 }
1052 /* size of physical stacked register partition plus 8 bytes: */
Chen, Kenneth Wa0776ec2006-10-13 10:05:45 -07001053 if (num_phys_stacked > max_num_phys_stacked) {
1054 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
1055 max_num_phys_stacked = num_phys_stacked;
1056 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 platform_cpu_init();
Venkatesh Pallipadi6c4fa562005-04-18 23:06:47 -04001058 pm_idle = default_idle;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059}
1060
Chen, Kenneth W244fd542006-03-12 09:00:13 -08001061void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062check_bugs (void)
1063{
1064 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
1065 (unsigned long) __end___mckinley_e9_bundles);
1066}
Matt Domsch3ed3bce2006-03-26 01:37:03 -08001067
1068static int __init run_dmi_scan(void)
1069{
1070 dmi_scan_machine();
1071 return 0;
1072}
1073core_initcall(run_dmi_scan);