blob: cf06fe799041d3ed269c849970df9d121283a7af [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
49#include <asm/ia32.h>
50#include <asm/machvec.h>
51#include <asm/mca.h>
52#include <asm/meminit.h>
53#include <asm/page.h>
54#include <asm/patch.h>
55#include <asm/pgtable.h>
56#include <asm/processor.h>
57#include <asm/sal.h>
58#include <asm/sections.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <asm/setup.h>
60#include <asm/smp.h>
61#include <asm/system.h>
62#include <asm/unistd.h>
Ingo Molnar4dc7a0b2006-01-12 01:05:27 -080063#include <asm/system.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65#if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
66# error "struct cpuinfo_ia64 too big!"
67#endif
68
69#ifdef CONFIG_SMP
70unsigned long __per_cpu_offset[NR_CPUS];
71EXPORT_SYMBOL(__per_cpu_offset);
72#endif
73
Tony Luckd6e56a22006-02-07 15:25:57 -080074extern void ia64_setup_printk_clock(void);
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info);
77DEFINE_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};
Tony Luckd7199482005-09-28 16:09:46 -070093extern char _text[], _end[], _etext[];
Khalid Azizbe379122005-09-19 15:42:36 -070094
Linus Torvalds1da177e2005-04-16 15:20:36 -070095unsigned long ia64_max_cacheline_size;
John W. Linvillee1531b42005-11-07 00:57:54 -080096
97int dma_get_cache_alignment(void)
98{
99 return ia64_max_cacheline_size;
100}
101EXPORT_SYMBOL(dma_get_cache_alignment);
102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103unsigned long ia64_iobase; /* virtual address for I/O accesses */
104EXPORT_SYMBOL(ia64_iobase);
105struct io_space io_space[MAX_IO_SPACES];
106EXPORT_SYMBOL(io_space);
107unsigned int num_io_spaces;
108
109/*
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700110 * "flush_icache_range()" needs to know what processor dependent stride size to use
111 * when it makes i-cache(s) coherent with d-caches.
112 */
113#define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */
114unsigned long ia64_i_cache_stride_shift = ~0;
115
116/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This
118 * mask specifies a mask of address bits that must be 0 in order for two buffers to be
119 * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start
120 * address of the second buffer must be aligned to (merge_mask+1) in order to be
121 * mergeable). By default, we assume there is no I/O MMU which can merge physically
122 * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu
123 * page-size of 2^64.
124 */
125unsigned long ia64_max_iommu_merge_mask = ~0UL;
126EXPORT_SYMBOL(ia64_max_iommu_merge_mask);
127
128/*
129 * We use a special marker for the end of memory and it uses the extra (+1) slot
130 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800131struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
132int num_rsvd_regions __initdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134
135/*
136 * Filter incoming memory segments based on the primitive map created from the boot
137 * parameters. Segments contained in the map are removed from the memory ranges. A
138 * caller-specified function is called with the memory ranges that remain after filtering.
139 * This routine does not assume the incoming segments are sorted.
140 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800141int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142filter_rsvd_memory (unsigned long start, unsigned long end, void *arg)
143{
144 unsigned long range_start, range_end, prev_start;
145 void (*func)(unsigned long, unsigned long, int);
146 int i;
147
148#if IGNORE_PFN0
149 if (start == PAGE_OFFSET) {
150 printk(KERN_WARNING "warning: skipping physical page 0\n");
151 start += PAGE_SIZE;
152 if (start >= end) return 0;
153 }
154#endif
155 /*
156 * lowest possible address(walker uses virtual)
157 */
158 prev_start = PAGE_OFFSET;
159 func = arg;
160
161 for (i = 0; i < num_rsvd_regions; ++i) {
162 range_start = max(start, prev_start);
163 range_end = min(end, rsvd_region[i].start);
164
165 if (range_start < range_end)
166 call_pernode_memory(__pa(range_start), range_end - range_start, func);
167
168 /* nothing more available in this segment */
169 if (range_end == end) return 0;
170
171 prev_start = rsvd_region[i].end;
172 }
173 /* end of memory marker allows full processing inside loop body */
174 return 0;
175}
176
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800177static void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178sort_regions (struct rsvd_region *rsvd_region, int max)
179{
180 int j;
181
182 /* simple bubble sorting */
183 while (max--) {
184 for (j = 0; j < max; ++j) {
185 if (rsvd_region[j].start > rsvd_region[j+1].start) {
186 struct rsvd_region tmp;
187 tmp = rsvd_region[j];
188 rsvd_region[j] = rsvd_region[j + 1];
189 rsvd_region[j + 1] = tmp;
190 }
191 }
192 }
193}
194
Khalid Azizbe379122005-09-19 15:42:36 -0700195/*
196 * Request address space for all standard resources
197 */
198static int __init register_memory(void)
199{
200 code_resource.start = ia64_tpa(_text);
201 code_resource.end = ia64_tpa(_etext) - 1;
202 data_resource.start = ia64_tpa(_etext);
Tony Luckd7199482005-09-28 16:09:46 -0700203 data_resource.end = ia64_tpa(_end) - 1;
Khalid Azizbe379122005-09-19 15:42:36 -0700204 efi_initialize_iomem_resources(&code_resource, &data_resource);
205
206 return 0;
207}
208
209__initcall(register_memory);
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211/**
212 * reserve_memory - setup reserved memory areas
213 *
214 * Setup the reserved memory areas set aside for the boot parameters,
215 * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
216 * see include/asm-ia64/meminit.h if you need to define more.
217 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800218void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219reserve_memory (void)
220{
221 int n = 0;
222
223 /*
224 * none of the entries in this table overlap
225 */
226 rsvd_region[n].start = (unsigned long) ia64_boot_param;
227 rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
228 n++;
229
230 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
231 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
232 n++;
233
234 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
235 rsvd_region[n].end = (rsvd_region[n].start
236 + strlen(__va(ia64_boot_param->command_line)) + 1);
237 n++;
238
239 rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
240 rsvd_region[n].end = (unsigned long) ia64_imva(_end);
241 n++;
242
243#ifdef CONFIG_BLK_DEV_INITRD
244 if (ia64_boot_param->initrd_start) {
245 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
246 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
247 n++;
248 }
249#endif
250
Magnus Dammcee87af2007-03-06 02:34:26 -0800251#ifdef CONFIG_PROC_VMCORE
252 if (reserve_elfcorehdr(&rsvd_region[n].start,
253 &rsvd_region[n].end) == 0)
254 n++;
255#endif
256
Tony Luckd8c97d52005-09-08 12:39:59 -0700257 efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
258 n++;
259
Zou Nan haia79561132006-12-07 09:51:35 -0800260#ifdef CONFIG_KEXEC
261 /* crashkernel=size@offset specifies the size to reserve for a crash
Hormsad1c3ba2006-12-12 18:08:10 +0900262 * kernel. If offset is 0, then it is determined automatically.
Zou Nan haia79561132006-12-07 09:51:35 -0800263 * By reserving this memory we guarantee that linux never set's it
264 * up as a DMA target.Useful for holding code to do something
265 * appropriate after a kernel panic.
266 */
267 {
Alon Bar-Leva8d91b82007-02-12 00:54:12 -0800268 char *from = strstr(boot_command_line, "crashkernel=");
Zou Nan haia79561132006-12-07 09:51:35 -0800269 unsigned long base, size;
270 if (from) {
271 size = memparse(from + 12, &from);
Hormsad1c3ba2006-12-12 18:08:10 +0900272 if (*from == '@')
273 base = memparse(from+1, &from);
274 else
275 base = 0;
Zou Nan haia79561132006-12-07 09:51:35 -0800276 if (size) {
Hormsad1c3ba2006-12-12 18:08:10 +0900277 if (!base) {
278 sort_regions(rsvd_region, n);
279 base = kdump_find_rsvd_region(size,
280 rsvd_region, n);
281 }
Zou Nan haia79561132006-12-07 09:51:35 -0800282 if (base != ~0UL) {
283 rsvd_region[n].start =
284 (unsigned long)__va(base);
285 rsvd_region[n].end =
286 (unsigned long)__va(base + size);
287 n++;
288 crashk_res.start = base;
289 crashk_res.end = base + size - 1;
290 }
291 }
292 }
293 efi_memmap_res.start = ia64_boot_param->efi_memmap;
294 efi_memmap_res.end = efi_memmap_res.start +
295 ia64_boot_param->efi_memmap_size;
296 boot_param_res.start = __pa(ia64_boot_param);
297 boot_param_res.end = boot_param_res.start +
298 sizeof(*ia64_boot_param);
299 }
300#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 /* end of memory marker */
302 rsvd_region[n].start = ~0UL;
303 rsvd_region[n].end = ~0UL;
304 n++;
305
306 num_rsvd_regions = n;
Alex Williamson5eb1d632006-06-06 10:36:27 -0600307 BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 sort_regions(rsvd_region, num_rsvd_regions);
310}
311
Zou Nan haia79561132006-12-07 09:51:35 -0800312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313/**
314 * find_initrd - get initrd parameters from the boot parameter structure
315 *
316 * Grab the initrd start and end from the boot parameter struct given us by
317 * the boot loader.
318 */
Chen, Kenneth Wdae28062006-03-22 16:54:15 -0800319void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320find_initrd (void)
321{
322#ifdef CONFIG_BLK_DEV_INITRD
323 if (ia64_boot_param->initrd_start) {
324 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
325 initrd_end = initrd_start+ia64_boot_param->initrd_size;
326
327 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
328 initrd_start, ia64_boot_param->initrd_size);
329 }
330#endif
331}
332
333static void __init
334io_port_init (void)
335{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 unsigned long phys_iobase;
337
338 /*
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600339 * Set `iobase' based on the EFI memory map or, failing that, the
340 * value firmware left in ar.k0.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 *
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600342 * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
343 * the port's virtual address, so ia32_load_state() loads it with a
344 * user virtual address. But in ia64 mode, glibc uses the
345 * *physical* address in ar.k0 to mmap the appropriate area from
346 * /dev/mem, and the inX()/outX() interfaces use MMIO. In both
347 * cases, user-mode can only use the legacy 0-64K I/O port space.
348 *
349 * ar.k0 is not involved in kernel I/O port accesses, which can use
350 * any of the I/O port spaces and are done via MMIO using the
351 * virtual mmio_base from the appropriate io_space[].
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 */
353 phys_iobase = efi_get_iobase();
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600354 if (!phys_iobase) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600356 printk(KERN_INFO "No I/O port range found in EFI memory map, "
357 "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 }
359 ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
Bjorn Helgaas44c45122005-09-16 11:43:10 -0600360 ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 /* setup legacy IO port space */
363 io_space[0].mmio_base = ia64_iobase;
364 io_space[0].sparse = 1;
365 num_io_spaces = 1;
366}
367
368/**
369 * early_console_setup - setup debugging console
370 *
371 * Consoles started here require little enough setup that we can start using
372 * them very early in the boot process, either right after the machine
373 * vector initialization, or even before if the drivers can detect their hw.
374 *
375 * Returns non-zero if a console couldn't be setup.
376 */
377static inline int __init
378early_console_setup (char *cmdline)
379{
Mark Maule66b7f8a2005-04-25 13:51:00 -0700380 int earlycons = 0;
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
383 {
384 extern int sn_serial_console_early_setup(void);
385 if (!sn_serial_console_early_setup())
Mark Maule66b7f8a2005-04-25 13:51:00 -0700386 earlycons++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 }
388#endif
389#ifdef CONFIG_EFI_PCDP
390 if (!efi_setup_pcdp_console(cmdline))
Mark Maule66b7f8a2005-04-25 13:51:00 -0700391 earlycons++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Mark Maule66b7f8a2005-04-25 13:51:00 -0700394 return (earlycons) ? 0 : -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395}
396
397static inline void
398mark_bsp_online (void)
399{
400#ifdef CONFIG_SMP
401 /* If we register an early console, allow CPU 0 to printk */
402 cpu_set(smp_processor_id(), cpu_online_map);
403#endif
404}
405
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700406#ifdef CONFIG_SMP
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800407static void __init
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700408check_for_logical_procs (void)
409{
410 pal_logical_to_physical_t info;
411 s64 status;
412
413 status = ia64_pal_logical_to_phys(0, &info);
414 if (status == -1) {
415 printk(KERN_INFO "No logical to physical processor mapping "
416 "available\n");
417 return;
418 }
419 if (status) {
420 printk(KERN_ERR "ia64_pal_logical_to_phys failed with %ld\n",
421 status);
422 return;
423 }
424 /*
425 * Total number of siblings that BSP has. Though not all of them
426 * may have booted successfully. The correct number of siblings
427 * booted is in info.overview_num_log.
428 */
429 smp_num_siblings = info.overview_tpc;
430 smp_num_cpucores = info.overview_cpp;
431}
432#endif
433
Hormsa5b00bb2006-03-23 14:27:12 -0800434static __initdata int nomca;
435static __init int setup_nomca(char *s)
436{
437 nomca = 1;
438 return 0;
439}
440early_param("nomca", setup_nomca);
441
Horms45a98fc2006-12-12 17:49:03 +0900442#ifdef CONFIG_PROC_VMCORE
443/* elfcorehdr= specifies the location of elf core header
444 * stored by the crashed kernel.
445 */
446static int __init parse_elfcorehdr(char *arg)
447{
448 if (!arg)
449 return -EINVAL;
450
451 elfcorehdr_addr = memparse(arg, &arg);
452 return 0;
453}
454early_param("elfcorehdr", parse_elfcorehdr);
Magnus Dammcee87af2007-03-06 02:34:26 -0800455
456int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
457{
458 unsigned long length;
459
460 /* We get the address using the kernel command line,
461 * but the size is extracted from the EFI tables.
462 * Both address and size are required for reservation
463 * to work properly.
464 */
465
466 if (elfcorehdr_addr >= ELFCORE_ADDR_MAX)
467 return -EINVAL;
468
469 if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
470 elfcorehdr_addr = ELFCORE_ADDR_MAX;
471 return -EINVAL;
472 }
473
474 *start = (unsigned long)__va(elfcorehdr_addr);
475 *end = *start + length;
476 return 0;
477}
478
Horms45a98fc2006-12-12 17:49:03 +0900479#endif /* CONFIG_PROC_VMCORE */
480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481void __init
482setup_arch (char **cmdline_p)
483{
484 unw_init();
485
486 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
487
488 *cmdline_p = __va(ia64_boot_param->command_line);
Alon Bar-Leva8d91b82007-02-12 00:54:12 -0800489 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
491 efi_init();
492 io_port_init();
493
Hormsa5b00bb2006-03-23 14:27:12 -0800494 parse_early_param();
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496#ifdef CONFIG_IA64_GENERIC
Hormsa5b00bb2006-03-23 14:27:12 -0800497 machvec_init(NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498#endif
499
500 if (early_console_setup(*cmdline_p) == 0)
501 mark_bsp_online();
502
Len Brown888ba6c2005-08-24 12:07:20 -0400503#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 /* Initialize the ACPI boot-time table parser */
505 acpi_table_init();
506# ifdef CONFIG_ACPI_NUMA
507 acpi_numa_init();
508# endif
509#else
510# ifdef CONFIG_SMP
511 smp_build_cpu_map(); /* happens, e.g., with the Ski simulator */
512# endif
513#endif /* CONFIG_APCI_BOOT */
514
515 find_memory();
516
517 /* process SAL system table: */
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800518 ia64_sal_init(__va(efi.sal_systab));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
Tony Luckd6e56a22006-02-07 15:25:57 -0800520 ia64_setup_printk_clock();
521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522#ifdef CONFIG_SMP
523 cpu_physical_id(0) = hard_smp_processor_id();
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700524
525 cpu_set(0, cpu_sibling_map[0]);
526 cpu_set(0, cpu_core_map[0]);
527
528 check_for_logical_procs();
529 if (smp_num_cpucores > 1)
530 printk(KERN_INFO
531 "cpu package is Multi-Core capable: number of cores=%d\n",
532 smp_num_cpucores);
533 if (smp_num_siblings > 1)
534 printk(KERN_INFO
535 "cpu package is Multi-Threading capable: number of siblings=%d\n",
536 smp_num_siblings);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537#endif
538
539 cpu_init(); /* initialize the bootstrap CPU */
Peter Keiltydcc17d12005-10-31 16:44:47 -0500540 mmu_context_init(); /* initialize context_id bitmap */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541
Troy Heberfa1d19e2006-10-25 14:46:15 -0600542 check_sal_cache_flush();
543
Len Brown888ba6c2005-08-24 12:07:20 -0400544#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 acpi_boot_init();
546#endif
547
548#ifdef CONFIG_VT
549 if (!conswitchp) {
550# if defined(CONFIG_DUMMY_CONSOLE)
551 conswitchp = &dummy_con;
552# endif
553# if defined(CONFIG_VGA_CONSOLE)
554 /*
555 * Non-legacy systems may route legacy VGA MMIO range to system
556 * memory. vga_con probes the MMIO hole, so memory looks like
557 * a VGA device to it. The EFI memory map can tell us if it's
558 * memory so we can avoid this problem.
559 */
560 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
561 conswitchp = &vga_con;
562# endif
563 }
564#endif
565
566 /* enable IA-64 Machine Check Abort Handling unless disabled */
Hormsa5b00bb2006-03-23 14:27:12 -0800567 if (!nomca)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 ia64_mca_init();
569
570 platform_setup(cmdline_p);
571 paging_init();
572}
573
574/*
Simon Arlott72fdbdc2007-05-11 14:55:43 -0700575 * Display cpu info for all CPUs.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 */
577static int
578show_cpuinfo (struct seq_file *m, void *v)
579{
580#ifdef CONFIG_SMP
581# define lpj c->loops_per_jiffy
582# define cpunum c->cpu
583#else
584# define lpj loops_per_jiffy
585# define cpunum 0
586#endif
587 static struct {
588 unsigned long mask;
589 const char *feature_name;
590 } feature_bits[] = {
591 { 1UL << 0, "branchlong" },
592 { 1UL << 1, "spontaneous deferral"},
593 { 1UL << 2, "16-byte atomic ops" }
594 };
Aron Griffisae0af3e2007-02-05 13:54:31 -0800595 char features[128], *cp, *sep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 struct cpuinfo_ia64 *c = v;
597 unsigned long mask;
Tony Luck38c0b2c2006-01-05 13:30:52 -0800598 unsigned long proc_freq;
Aron Griffisae0af3e2007-02-05 13:54:31 -0800599 int i, size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
601 mask = c->features;
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 /* build the feature string: */
Aron Griffisae0af3e2007-02-05 13:54:31 -0800604 memcpy(features, "standard", 9);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 cp = features;
Aron Griffisae0af3e2007-02-05 13:54:31 -0800606 size = sizeof(features);
607 sep = "";
608 for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 if (mask & feature_bits[i].mask) {
Aron Griffisae0af3e2007-02-05 13:54:31 -0800610 cp += snprintf(cp, size, "%s%s", sep,
611 feature_bits[i].feature_name),
612 sep = ", ";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 mask &= ~feature_bits[i].mask;
Aron Griffisae0af3e2007-02-05 13:54:31 -0800614 size = sizeof(features) - (cp - features);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 }
616 }
Aron Griffisae0af3e2007-02-05 13:54:31 -0800617 if (mask && size > 1) {
618 /* print unknown features as a hex value */
619 snprintf(cp, size, "%s0x%lx", sep, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 }
621
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -0800622 proc_freq = cpufreq_quick_get(cpunum);
623 if (!proc_freq)
624 proc_freq = c->proc_freq / 1000;
625
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 seq_printf(m,
627 "processor : %d\n"
628 "vendor : %s\n"
629 "arch : IA-64\n"
Tony Luck76d08bb2006-06-05 13:54:14 -0700630 "family : %u\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 "model : %u\n"
Tony Luck76d08bb2006-06-05 13:54:14 -0700632 "model name : %s\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 "revision : %u\n"
634 "archrev : %u\n"
Aron Griffisae0af3e2007-02-05 13:54:31 -0800635 "features : %s\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 "cpu number : %lu\n"
637 "cpu regs : %u\n"
Venki Pallipadi8a3a78d2007-04-06 10:04:49 -0700638 "cpu MHz : %lu.%03lu\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 "itc MHz : %lu.%06lu\n"
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700640 "BogoMIPS : %lu.%02lu\n",
Tony Luck76d08bb2006-06-05 13:54:14 -0700641 cpunum, c->vendor, c->family, c->model,
642 c->model_name, c->revision, c->archrev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 features, c->ppn, c->number,
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -0800644 proc_freq / 1000, proc_freq % 1000,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 c->itc_freq / 1000000, c->itc_freq % 1000000,
646 lpj*HZ/500000, (lpj*HZ/5000) % 100);
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700647#ifdef CONFIG_SMP
Siddha, Suresh Bce6e71a2005-10-04 16:35:31 -0700648 seq_printf(m, "siblings : %u\n", cpus_weight(cpu_core_map[cpunum]));
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700649 if (c->threads_per_core > 1 || c->cores_per_socket > 1)
650 seq_printf(m,
651 "physical id: %u\n"
652 "core id : %u\n"
653 "thread id : %u\n",
654 c->socket_id, c->core_id, c->thread_id);
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700655#endif
656 seq_printf(m,"\n");
657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 return 0;
659}
660
661static void *
662c_start (struct seq_file *m, loff_t *pos)
663{
664#ifdef CONFIG_SMP
665 while (*pos < NR_CPUS && !cpu_isset(*pos, cpu_online_map))
666 ++*pos;
667#endif
668 return *pos < NR_CPUS ? cpu_data(*pos) : NULL;
669}
670
671static void *
672c_next (struct seq_file *m, void *v, loff_t *pos)
673{
674 ++*pos;
675 return c_start(m, pos);
676}
677
678static void
679c_stop (struct seq_file *m, void *v)
680{
681}
682
683struct seq_operations cpuinfo_op = {
684 .start = c_start,
685 .next = c_next,
686 .stop = c_stop,
687 .show = show_cpuinfo
688};
689
Jack Steinerc5e83e32007-03-12 08:07:49 -0500690#define MAX_BRANDS 8
691static char brandname[MAX_BRANDS][128];
Tony Luck76d08bb2006-06-05 13:54:14 -0700692
693static char * __cpuinit
694get_model_name(__u8 family, __u8 model)
695{
Jack Steinerc5e83e32007-03-12 08:07:49 -0500696 static int overflow;
Tony Luck76d08bb2006-06-05 13:54:14 -0700697 char brand[128];
Jack Steinerc5e83e32007-03-12 08:07:49 -0500698 int i;
Tony Luck76d08bb2006-06-05 13:54:14 -0700699
Tony Luck75f6a1d2006-12-12 11:56:36 -0800700 memcpy(brand, "Unknown", 8);
Tony Luck76d08bb2006-06-05 13:54:14 -0700701 if (ia64_pal_get_brand_info(brand)) {
702 if (family == 0x7)
703 memcpy(brand, "Merced", 7);
704 else if (family == 0x1f) switch (model) {
705 case 0: memcpy(brand, "McKinley", 9); break;
706 case 1: memcpy(brand, "Madison", 8); break;
707 case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
Tony Luck75f6a1d2006-12-12 11:56:36 -0800708 }
Tony Luck76d08bb2006-06-05 13:54:14 -0700709 }
Jack Steinerc5e83e32007-03-12 08:07:49 -0500710 for (i = 0; i < MAX_BRANDS; i++)
711 if (strcmp(brandname[i], brand) == 0)
712 return brandname[i];
713 for (i = 0; i < MAX_BRANDS; i++)
714 if (brandname[i][0] == '\0')
715 return strcpy(brandname[i], brand);
716 if (overflow++ == 0)
717 printk(KERN_ERR
718 "%s: Table overflow. Some processor model information will be missing\n",
719 __FUNCTION__);
720 return "Unknown";
Tony Luck76d08bb2006-06-05 13:54:14 -0700721}
722
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800723static void __cpuinit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724identify_cpu (struct cpuinfo_ia64 *c)
725{
726 union {
727 unsigned long bits[5];
728 struct {
729 /* id 0 & 1: */
730 char vendor[16];
731
732 /* id 2 */
733 u64 ppn; /* processor serial number */
734
735 /* id 3: */
736 unsigned number : 8;
737 unsigned revision : 8;
738 unsigned model : 8;
739 unsigned family : 8;
740 unsigned archrev : 8;
741 unsigned reserved : 24;
742
743 /* id 4: */
744 u64 features;
745 } field;
746 } cpuid;
747 pal_vm_info_1_u_t vm1;
748 pal_vm_info_2_u_t vm2;
749 pal_status_t status;
750 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */
751 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 for (i = 0; i < 5; ++i)
753 cpuid.bits[i] = ia64_get_cpuid(i);
754
755 memcpy(c->vendor, cpuid.field.vendor, 16);
756#ifdef CONFIG_SMP
757 c->cpu = smp_processor_id();
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700758
759 /* below default values will be overwritten by identify_siblings()
Simon Arlott72fdbdc2007-05-11 14:55:43 -0700760 * for Multi-Threading/Multi-Core capable CPUs
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700761 */
762 c->threads_per_core = c->cores_per_socket = c->num_log = 1;
763 c->socket_id = -1;
764
765 identify_siblings(c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766#endif
767 c->ppn = cpuid.field.ppn;
768 c->number = cpuid.field.number;
769 c->revision = cpuid.field.revision;
770 c->model = cpuid.field.model;
771 c->family = cpuid.field.family;
772 c->archrev = cpuid.field.archrev;
773 c->features = cpuid.field.features;
Tony Luck76d08bb2006-06-05 13:54:14 -0700774 c->model_name = get_model_name(c->family, c->model);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
776 status = ia64_pal_vm_summary(&vm1, &vm2);
777 if (status == PAL_STATUS_SUCCESS) {
778 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
779 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
780 }
781 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
782 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
783}
784
Tony Luck0f7ac292007-05-07 13:17:00 -0700785void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786setup_per_cpu_areas (void)
787{
788 /* start_kernel() requires this... */
Ashok Raja6b14fa2006-02-14 15:01:12 -0800789#ifdef CONFIG_ACPI_HOTPLUG_CPU
790 prefill_possible_map();
791#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792}
793
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700794/*
795 * Calculate the max. cache line size.
796 *
797 * In addition, the minimum of the i-cache stride sizes is calculated for
798 * "flush_icache_range()".
799 */
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800800static void __cpuinit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801get_max_cacheline_size (void)
802{
803 unsigned long line_size, max = 1;
804 u64 l, levels, unique_caches;
805 pal_cache_config_info_t cci;
806 s64 status;
807
808 status = ia64_pal_cache_summary(&levels, &unique_caches);
809 if (status != 0) {
810 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
811 __FUNCTION__, status);
812 max = SMP_CACHE_BYTES;
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700813 /* Safest setup for "flush_icache_range()" */
814 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 goto out;
816 }
817
818 for (l = 0; l < levels; ++l) {
819 status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2,
820 &cci);
821 if (status != 0) {
822 printk(KERN_ERR
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700823 "%s: ia64_pal_cache_config_info(l=%lu, 2) failed (status=%ld)\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 __FUNCTION__, l, status);
825 max = SMP_CACHE_BYTES;
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700826 /* The safest setup for "flush_icache_range()" */
827 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
828 cci.pcci_unified = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 }
830 line_size = 1 << cci.pcci_line_size;
831 if (line_size > max)
832 max = line_size;
Zoltan Menyhart08357f82005-06-03 05:36:00 -0700833 if (!cci.pcci_unified) {
834 status = ia64_pal_cache_config_info(l,
835 /* cache_type (instruction)= */ 1,
836 &cci);
837 if (status != 0) {
838 printk(KERN_ERR
839 "%s: ia64_pal_cache_config_info(l=%lu, 1) failed (status=%ld)\n",
840 __FUNCTION__, l, status);
841 /* The safest setup for "flush_icache_range()" */
842 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
843 }
844 }
845 if (cci.pcci_stride < ia64_i_cache_stride_shift)
846 ia64_i_cache_stride_shift = cci.pcci_stride;
847 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 out:
849 if (max > ia64_max_cacheline_size)
850 ia64_max_cacheline_size = max;
851}
852
853/*
854 * cpu_init() initializes state that is per-CPU. This function acts
855 * as a 'CPU state barrier', nothing should get across.
856 */
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800857void __cpuinit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858cpu_init (void)
859{
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800860 extern void __cpuinit ia64_mmu_init (void *);
Chen, Kenneth Wa0776ec2006-10-13 10:05:45 -0700861 static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 unsigned long num_phys_stacked;
863 pal_vm_info_2_u_t vmi;
864 unsigned int max_ctx;
865 struct cpuinfo_ia64 *cpu_info;
866 void *cpu_data;
867
868 cpu_data = per_cpu_init();
869
870 /*
871 * We set ar.k3 so that assembly code in MCA handler can compute
872 * physical addresses of per cpu variables with a simple:
873 * phys = ar.k3 + &per_cpu_var
874 */
875 ia64_set_kr(IA64_KR_PER_CPU_DATA,
876 ia64_tpa(cpu_data) - (long) __per_cpu_start);
877
878 get_max_cacheline_size();
879
880 /*
881 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
882 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
883 * depends on the data returned by identify_cpu(). We break the dependency by
884 * accessing cpu_data() through the canonical per-CPU address.
885 */
886 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
887 identify_cpu(cpu_info);
888
889#ifdef CONFIG_MCKINLEY
890 {
891# define FEATURE_SET 16
892 struct ia64_pal_retval iprv;
893
894 if (cpu_info->family == 0x1f) {
895 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
896 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
897 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
898 (iprv.v1 | 0x80), FEATURE_SET, 0);
899 }
900 }
901#endif
902
903 /* Clear the stack memory reserved for pt_regs: */
Al Viro64505782006-01-12 01:06:06 -0800904 memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905
906 ia64_set_kr(IA64_KR_FPU_OWNER, 0);
907
908 /*
909 * Initialize the page-table base register to a global
910 * directory with all zeroes. This ensure that we can handle
911 * TLB-misses to user address-space even before we created the
912 * first user address-space. This may happen, e.g., due to
913 * aggressive use of lfetch.fault.
914 */
915 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
916
917 /*
Tony Luck86ebacd2005-06-08 12:12:48 -0700918 * Initialize default control register to defer speculative faults except
919 * for those arising from TLB misses, which are not deferred. The
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 * kernel MUST NOT depend on a particular setting of these bits (in other words,
921 * the kernel must have recovery code for all speculative accesses). Turn on
922 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps
923 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
924 * be fine).
925 */
926 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
927 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
928 atomic_inc(&init_mm.mm_count);
929 current->active_mm = &init_mm;
930 if (current->mm)
931 BUG();
932
933 ia64_mmu_init(ia64_imva(cpu_data));
934 ia64_mca_cpu_init(ia64_imva(cpu_data));
935
936#ifdef CONFIG_IA32_SUPPORT
937 ia32_cpu_init();
938#endif
939
Simon Arlott72fdbdc2007-05-11 14:55:43 -0700940 /* Clear ITC to eliminate sched_clock() overflows in human time. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 ia64_set_itc(0);
942
943 /* disable all local interrupt sources: */
944 ia64_set_itv(1 << 16);
945 ia64_set_lrr0(1 << 16);
946 ia64_set_lrr1(1 << 16);
947 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
948 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
949
950 /* clear TPR & XTP to enable all interrupt classes: */
951 ia64_setreg(_IA64_REG_CR_TPR, 0);
952#ifdef CONFIG_SMP
953 normal_xtp();
954#endif
955
956 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
957 if (ia64_pal_vm_summary(NULL, &vmi) == 0)
958 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
959 else {
960 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
961 max_ctx = (1U << 15) - 1; /* use architected minimum */
962 }
963 while (max_ctx < ia64_ctx.max_ctx) {
964 unsigned int old = ia64_ctx.max_ctx;
965 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
966 break;
967 }
968
969 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
970 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
971 "stacked regs\n");
972 num_phys_stacked = 96;
973 }
974 /* size of physical stacked register partition plus 8 bytes: */
Chen, Kenneth Wa0776ec2006-10-13 10:05:45 -0700975 if (num_phys_stacked > max_num_phys_stacked) {
976 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
977 max_num_phys_stacked = num_phys_stacked;
978 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 platform_cpu_init();
Venkatesh Pallipadi6c4fa562005-04-18 23:06:47 -0400980 pm_idle = default_idle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981}
982
Chen, Kenneth W244fd542006-03-12 09:00:13 -0800983void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984check_bugs (void)
985{
986 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
987 (unsigned long) __end___mckinley_e9_bundles);
988}
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800989
990static int __init run_dmi_scan(void)
991{
992 dmi_scan_machine();
993 return 0;
994}
995core_initcall(run_dmi_scan);