Commit | Line | Data |
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1da177e4 LT |
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> | |
e927ecb0 SS |
7 | * 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> | |
1da177e4 LT |
11 | * Copyright (C) 1999 VA Linux Systems |
12 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
13 | * | |
e927ecb0 SS |
14 | * 12/26/04 S.Siddha, G.Jin, R.Seth |
15 | * Add multi-threading and multi-core detection | |
1da177e4 LT |
16 | * 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. | |
08357f82 | 23 | * 05/28/05 Z. Menyhart Dynamic stride size for "flush_icache_range()" |
1da177e4 | 24 | */ |
1da177e4 LT |
25 | #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> | |
894673ee | 38 | #include <linux/screen_info.h> |
3ed3bce8 | 39 | #include <linux/dmi.h> |
1da177e4 LT |
40 | #include <linux/serial.h> |
41 | #include <linux/serial_core.h> | |
42 | #include <linux/efi.h> | |
43 | #include <linux/initrd.h> | |
6c4fa560 | 44 | #include <linux/pm.h> |
95235ca2 | 45 | #include <linux/cpufreq.h> |
a7956113 ZN |
46 | #include <linux/kexec.h> |
47 | #include <linux/crash_dump.h> | |
1da177e4 | 48 | |
1da177e4 LT |
49 | #include <asm/machvec.h> |
50 | #include <asm/mca.h> | |
51 | #include <asm/meminit.h> | |
52 | #include <asm/page.h> | |
e51835d5 | 53 | #include <asm/paravirt.h> |
03f511dd | 54 | #include <asm/paravirt_patch.h> |
1da177e4 LT |
55 | #include <asm/patch.h> |
56 | #include <asm/pgtable.h> | |
57 | #include <asm/processor.h> | |
58 | #include <asm/sal.h> | |
59 | #include <asm/sections.h> | |
1da177e4 LT |
60 | #include <asm/setup.h> |
61 | #include <asm/smp.h> | |
2046b94e | 62 | #include <asm/tlbflush.h> |
1da177e4 | 63 | #include <asm/unistd.h> |
8b713c67 | 64 | #include <asm/hpsim.h> |
1da177e4 LT |
65 | |
66 | #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE) | |
67 | # error "struct cpuinfo_ia64 too big!" | |
68 | #endif | |
69 | ||
70 | #ifdef CONFIG_SMP | |
71 | unsigned long __per_cpu_offset[NR_CPUS]; | |
72 | EXPORT_SYMBOL(__per_cpu_offset); | |
73 | #endif | |
74 | ||
877105cc | 75 | DEFINE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info); |
1da177e4 | 76 | DEFINE_PER_CPU(unsigned long, local_per_cpu_offset); |
1da177e4 LT |
77 | unsigned long ia64_cycles_per_usec; |
78 | struct ia64_boot_param *ia64_boot_param; | |
79 | struct screen_info screen_info; | |
66b7f8a3 MM |
80 | unsigned long vga_console_iobase; |
81 | unsigned long vga_console_membase; | |
1da177e4 | 82 | |
be379124 KA |
83 | static struct resource data_resource = { |
84 | .name = "Kernel data", | |
85 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
86 | }; | |
87 | ||
88 | static struct resource code_resource = { | |
89 | .name = "Kernel code", | |
90 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
91 | }; | |
00bf4098 BW |
92 | |
93 | static struct resource bss_resource = { | |
94 | .name = "Kernel bss", | |
95 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
96 | }; | |
be379124 | 97 | |
1da177e4 | 98 | unsigned long ia64_max_cacheline_size; |
e1531b42 | 99 | |
1da177e4 LT |
100 | unsigned long ia64_iobase; /* virtual address for I/O accesses */ |
101 | EXPORT_SYMBOL(ia64_iobase); | |
102 | struct io_space io_space[MAX_IO_SPACES]; | |
103 | EXPORT_SYMBOL(io_space); | |
104 | unsigned int num_io_spaces; | |
105 | ||
08357f82 ZM |
106 | /* |
107 | * "flush_icache_range()" needs to know what processor dependent stride size to use | |
108 | * when it makes i-cache(s) coherent with d-caches. | |
109 | */ | |
110 | #define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */ | |
111 | unsigned long ia64_i_cache_stride_shift = ~0; | |
62fdd767 FY |
112 | /* |
113 | * "clflush_cache_range()" needs to know what processor dependent stride size to | |
114 | * use when it flushes cache lines including both d-cache and i-cache. | |
115 | */ | |
116 | /* Safest way to go: 32 bytes by 32 bytes */ | |
117 | #define CACHE_STRIDE_SHIFT 5 | |
118 | unsigned long ia64_cache_stride_shift = ~0; | |
08357f82 | 119 | |
1da177e4 LT |
120 | /* |
121 | * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This | |
122 | * mask specifies a mask of address bits that must be 0 in order for two buffers to be | |
123 | * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start | |
124 | * address of the second buffer must be aligned to (merge_mask+1) in order to be | |
125 | * mergeable). By default, we assume there is no I/O MMU which can merge physically | |
126 | * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu | |
127 | * page-size of 2^64. | |
128 | */ | |
129 | unsigned long ia64_max_iommu_merge_mask = ~0UL; | |
130 | EXPORT_SYMBOL(ia64_max_iommu_merge_mask); | |
131 | ||
132 | /* | |
133 | * We use a special marker for the end of memory and it uses the extra (+1) slot | |
134 | */ | |
dae28066 CK |
135 | struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata; |
136 | int num_rsvd_regions __initdata; | |
1da177e4 LT |
137 | |
138 | ||
139 | /* | |
140 | * Filter incoming memory segments based on the primitive map created from the boot | |
141 | * parameters. Segments contained in the map are removed from the memory ranges. A | |
142 | * caller-specified function is called with the memory ranges that remain after filtering. | |
143 | * This routine does not assume the incoming segments are sorted. | |
144 | */ | |
dae28066 | 145 | int __init |
e088a4ad | 146 | filter_rsvd_memory (u64 start, u64 end, void *arg) |
1da177e4 | 147 | { |
e088a4ad | 148 | u64 range_start, range_end, prev_start; |
1da177e4 LT |
149 | void (*func)(unsigned long, unsigned long, int); |
150 | int i; | |
151 | ||
152 | #if IGNORE_PFN0 | |
153 | if (start == PAGE_OFFSET) { | |
154 | printk(KERN_WARNING "warning: skipping physical page 0\n"); | |
155 | start += PAGE_SIZE; | |
156 | if (start >= end) return 0; | |
157 | } | |
158 | #endif | |
159 | /* | |
160 | * lowest possible address(walker uses virtual) | |
161 | */ | |
162 | prev_start = PAGE_OFFSET; | |
163 | func = arg; | |
164 | ||
165 | for (i = 0; i < num_rsvd_regions; ++i) { | |
166 | range_start = max(start, prev_start); | |
167 | range_end = min(end, rsvd_region[i].start); | |
168 | ||
169 | if (range_start < range_end) | |
170 | call_pernode_memory(__pa(range_start), range_end - range_start, func); | |
171 | ||
172 | /* nothing more available in this segment */ | |
173 | if (range_end == end) return 0; | |
174 | ||
175 | prev_start = rsvd_region[i].end; | |
176 | } | |
177 | /* end of memory marker allows full processing inside loop body */ | |
178 | return 0; | |
179 | } | |
180 | ||
98075d24 ZM |
181 | /* |
182 | * Similar to "filter_rsvd_memory()", but the reserved memory ranges | |
183 | * are not filtered out. | |
184 | */ | |
185 | int __init | |
e088a4ad | 186 | filter_memory(u64 start, u64 end, void *arg) |
98075d24 ZM |
187 | { |
188 | void (*func)(unsigned long, unsigned long, int); | |
189 | ||
190 | #if IGNORE_PFN0 | |
191 | if (start == PAGE_OFFSET) { | |
192 | printk(KERN_WARNING "warning: skipping physical page 0\n"); | |
193 | start += PAGE_SIZE; | |
194 | if (start >= end) | |
195 | return 0; | |
196 | } | |
197 | #endif | |
198 | func = arg; | |
199 | if (start < end) | |
200 | call_pernode_memory(__pa(start), end - start, func); | |
201 | return 0; | |
202 | } | |
203 | ||
dae28066 | 204 | static void __init |
1da177e4 LT |
205 | sort_regions (struct rsvd_region *rsvd_region, int max) |
206 | { | |
207 | int j; | |
208 | ||
209 | /* simple bubble sorting */ | |
210 | while (max--) { | |
211 | for (j = 0; j < max; ++j) { | |
212 | if (rsvd_region[j].start > rsvd_region[j+1].start) { | |
213 | struct rsvd_region tmp; | |
214 | tmp = rsvd_region[j]; | |
215 | rsvd_region[j] = rsvd_region[j + 1]; | |
216 | rsvd_region[j + 1] = tmp; | |
217 | } | |
218 | } | |
219 | } | |
220 | } | |
221 | ||
76d71ebd PT |
222 | /* merge overlaps */ |
223 | static int __init | |
224 | merge_regions (struct rsvd_region *rsvd_region, int max) | |
225 | { | |
226 | int i; | |
227 | for (i = 1; i < max; ++i) { | |
228 | if (rsvd_region[i].start >= rsvd_region[i-1].end) | |
229 | continue; | |
230 | if (rsvd_region[i].end > rsvd_region[i-1].end) | |
231 | rsvd_region[i-1].end = rsvd_region[i].end; | |
232 | --max; | |
233 | memmove(&rsvd_region[i], &rsvd_region[i+1], | |
234 | (max - i) * sizeof(struct rsvd_region)); | |
235 | } | |
236 | return max; | |
237 | } | |
238 | ||
be379124 KA |
239 | /* |
240 | * Request address space for all standard resources | |
241 | */ | |
242 | static int __init register_memory(void) | |
243 | { | |
244 | code_resource.start = ia64_tpa(_text); | |
245 | code_resource.end = ia64_tpa(_etext) - 1; | |
246 | data_resource.start = ia64_tpa(_etext); | |
00bf4098 | 247 | data_resource.end = ia64_tpa(_edata) - 1; |
b898a424 | 248 | bss_resource.start = ia64_tpa(__bss_start); |
00bf4098 BW |
249 | bss_resource.end = ia64_tpa(_end) - 1; |
250 | efi_initialize_iomem_resources(&code_resource, &data_resource, | |
251 | &bss_resource); | |
be379124 KA |
252 | |
253 | return 0; | |
254 | } | |
255 | ||
256 | __initcall(register_memory); | |
257 | ||
cb380853 BW |
258 | |
259 | #ifdef CONFIG_KEXEC | |
8a3360f0 BW |
260 | |
261 | /* | |
262 | * This function checks if the reserved crashkernel is allowed on the specific | |
263 | * IA64 machine flavour. Machines without an IO TLB use swiotlb and require | |
264 | * some memory below 4 GB (i.e. in 32 bit area), see the implementation of | |
265 | * lib/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that | |
266 | * in kdump case. See the comment in sba_init() in sba_iommu.c. | |
267 | * | |
268 | * So, the only machvec that really supports loading the kdump kernel | |
269 | * over 4 GB is "sn2". | |
270 | */ | |
271 | static int __init check_crashkernel_memory(unsigned long pbase, size_t size) | |
272 | { | |
273 | if (ia64_platform_is("sn2") || ia64_platform_is("uv")) | |
274 | return 1; | |
275 | else | |
276 | return pbase < (1UL << 32); | |
277 | } | |
278 | ||
cb380853 BW |
279 | static void __init setup_crashkernel(unsigned long total, int *n) |
280 | { | |
281 | unsigned long long base = 0, size = 0; | |
282 | int ret; | |
283 | ||
284 | ret = parse_crashkernel(boot_command_line, total, | |
285 | &size, &base); | |
286 | if (ret == 0 && size > 0) { | |
287 | if (!base) { | |
288 | sort_regions(rsvd_region, *n); | |
76d71ebd | 289 | *n = merge_regions(rsvd_region, *n); |
cb380853 BW |
290 | base = kdump_find_rsvd_region(size, |
291 | rsvd_region, *n); | |
292 | } | |
8a3360f0 BW |
293 | |
294 | if (!check_crashkernel_memory(base, size)) { | |
295 | pr_warning("crashkernel: There would be kdump memory " | |
296 | "at %ld GB but this is unusable because it " | |
297 | "must\nbe below 4 GB. Change the memory " | |
298 | "configuration of the machine.\n", | |
299 | (unsigned long)(base >> 30)); | |
300 | return; | |
301 | } | |
302 | ||
cb380853 BW |
303 | if (base != ~0UL) { |
304 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
305 | "for crashkernel (System RAM: %ldMB)\n", | |
306 | (unsigned long)(size >> 20), | |
307 | (unsigned long)(base >> 20), | |
308 | (unsigned long)(total >> 20)); | |
309 | rsvd_region[*n].start = | |
310 | (unsigned long)__va(base); | |
311 | rsvd_region[*n].end = | |
312 | (unsigned long)__va(base + size); | |
313 | (*n)++; | |
314 | crashk_res.start = base; | |
315 | crashk_res.end = base + size - 1; | |
316 | } | |
317 | } | |
318 | efi_memmap_res.start = ia64_boot_param->efi_memmap; | |
319 | efi_memmap_res.end = efi_memmap_res.start + | |
320 | ia64_boot_param->efi_memmap_size; | |
321 | boot_param_res.start = __pa(ia64_boot_param); | |
322 | boot_param_res.end = boot_param_res.start + | |
323 | sizeof(*ia64_boot_param); | |
324 | } | |
325 | #else | |
326 | static inline void __init setup_crashkernel(unsigned long total, int *n) | |
327 | {} | |
328 | #endif | |
329 | ||
1da177e4 LT |
330 | /** |
331 | * reserve_memory - setup reserved memory areas | |
332 | * | |
333 | * Setup the reserved memory areas set aside for the boot parameters, | |
334 | * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined, | |
7f30491c | 335 | * see arch/ia64/include/asm/meminit.h if you need to define more. |
1da177e4 | 336 | */ |
dae28066 | 337 | void __init |
1da177e4 LT |
338 | reserve_memory (void) |
339 | { | |
340 | int n = 0; | |
cb380853 | 341 | unsigned long total_memory; |
1da177e4 LT |
342 | |
343 | /* | |
344 | * none of the entries in this table overlap | |
345 | */ | |
346 | rsvd_region[n].start = (unsigned long) ia64_boot_param; | |
347 | rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param); | |
348 | n++; | |
349 | ||
350 | rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap); | |
351 | rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size; | |
352 | n++; | |
353 | ||
354 | rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line); | |
355 | rsvd_region[n].end = (rsvd_region[n].start | |
356 | + strlen(__va(ia64_boot_param->command_line)) + 1); | |
357 | n++; | |
358 | ||
359 | rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START); | |
360 | rsvd_region[n].end = (unsigned long) ia64_imva(_end); | |
361 | n++; | |
362 | ||
e51835d5 IY |
363 | n += paravirt_reserve_memory(&rsvd_region[n]); |
364 | ||
1da177e4 LT |
365 | #ifdef CONFIG_BLK_DEV_INITRD |
366 | if (ia64_boot_param->initrd_start) { | |
367 | rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start); | |
368 | rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size; | |
369 | n++; | |
370 | } | |
371 | #endif | |
372 | ||
17c1f07e | 373 | #ifdef CONFIG_CRASH_DUMP |
cee87af2 MD |
374 | if (reserve_elfcorehdr(&rsvd_region[n].start, |
375 | &rsvd_region[n].end) == 0) | |
376 | n++; | |
377 | #endif | |
378 | ||
cb380853 | 379 | total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); |
d8c97d5f TL |
380 | n++; |
381 | ||
cb380853 BW |
382 | setup_crashkernel(total_memory, &n); |
383 | ||
1da177e4 LT |
384 | /* end of memory marker */ |
385 | rsvd_region[n].start = ~0UL; | |
386 | rsvd_region[n].end = ~0UL; | |
387 | n++; | |
388 | ||
389 | num_rsvd_regions = n; | |
5eb1d63f | 390 | BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n); |
1da177e4 LT |
391 | |
392 | sort_regions(rsvd_region, num_rsvd_regions); | |
76d71ebd | 393 | num_rsvd_regions = merge_regions(rsvd_region, num_rsvd_regions); |
1da177e4 LT |
394 | } |
395 | ||
a7956113 | 396 | |
1da177e4 LT |
397 | /** |
398 | * find_initrd - get initrd parameters from the boot parameter structure | |
399 | * | |
400 | * Grab the initrd start and end from the boot parameter struct given us by | |
401 | * the boot loader. | |
402 | */ | |
dae28066 | 403 | void __init |
1da177e4 LT |
404 | find_initrd (void) |
405 | { | |
406 | #ifdef CONFIG_BLK_DEV_INITRD | |
407 | if (ia64_boot_param->initrd_start) { | |
408 | initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start); | |
409 | initrd_end = initrd_start+ia64_boot_param->initrd_size; | |
410 | ||
e088a4ad | 411 | printk(KERN_INFO "Initial ramdisk at: 0x%lx (%llu bytes)\n", |
1da177e4 LT |
412 | initrd_start, ia64_boot_param->initrd_size); |
413 | } | |
414 | #endif | |
415 | } | |
416 | ||
417 | static void __init | |
418 | io_port_init (void) | |
419 | { | |
1da177e4 LT |
420 | unsigned long phys_iobase; |
421 | ||
422 | /* | |
44c45120 BH |
423 | * Set `iobase' based on the EFI memory map or, failing that, the |
424 | * value firmware left in ar.k0. | |
1da177e4 | 425 | * |
44c45120 BH |
426 | * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute |
427 | * the port's virtual address, so ia32_load_state() loads it with a | |
428 | * user virtual address. But in ia64 mode, glibc uses the | |
429 | * *physical* address in ar.k0 to mmap the appropriate area from | |
430 | * /dev/mem, and the inX()/outX() interfaces use MMIO. In both | |
431 | * cases, user-mode can only use the legacy 0-64K I/O port space. | |
432 | * | |
433 | * ar.k0 is not involved in kernel I/O port accesses, which can use | |
434 | * any of the I/O port spaces and are done via MMIO using the | |
435 | * virtual mmio_base from the appropriate io_space[]. | |
1da177e4 LT |
436 | */ |
437 | phys_iobase = efi_get_iobase(); | |
44c45120 | 438 | if (!phys_iobase) { |
1da177e4 | 439 | phys_iobase = ia64_get_kr(IA64_KR_IO_BASE); |
44c45120 BH |
440 | printk(KERN_INFO "No I/O port range found in EFI memory map, " |
441 | "falling back to AR.KR0 (0x%lx)\n", phys_iobase); | |
1da177e4 LT |
442 | } |
443 | ia64_iobase = (unsigned long) ioremap(phys_iobase, 0); | |
44c45120 | 444 | ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase)); |
1da177e4 LT |
445 | |
446 | /* setup legacy IO port space */ | |
447 | io_space[0].mmio_base = ia64_iobase; | |
448 | io_space[0].sparse = 1; | |
449 | num_io_spaces = 1; | |
450 | } | |
451 | ||
452 | /** | |
453 | * early_console_setup - setup debugging console | |
454 | * | |
455 | * Consoles started here require little enough setup that we can start using | |
456 | * them very early in the boot process, either right after the machine | |
457 | * vector initialization, or even before if the drivers can detect their hw. | |
458 | * | |
459 | * Returns non-zero if a console couldn't be setup. | |
460 | */ | |
461 | static inline int __init | |
462 | early_console_setup (char *cmdline) | |
463 | { | |
66b7f8a3 MM |
464 | int earlycons = 0; |
465 | ||
1da177e4 LT |
466 | #ifdef CONFIG_SERIAL_SGI_L1_CONSOLE |
467 | { | |
468 | extern int sn_serial_console_early_setup(void); | |
469 | if (!sn_serial_console_early_setup()) | |
66b7f8a3 | 470 | earlycons++; |
1da177e4 LT |
471 | } |
472 | #endif | |
473 | #ifdef CONFIG_EFI_PCDP | |
474 | if (!efi_setup_pcdp_console(cmdline)) | |
66b7f8a3 | 475 | earlycons++; |
1da177e4 | 476 | #endif |
8b713c67 | 477 | if (!simcons_register()) |
471e7a44 | 478 | earlycons++; |
1da177e4 | 479 | |
66b7f8a3 | 480 | return (earlycons) ? 0 : -1; |
1da177e4 LT |
481 | } |
482 | ||
483 | static inline void | |
484 | mark_bsp_online (void) | |
485 | { | |
486 | #ifdef CONFIG_SMP | |
487 | /* If we register an early console, allow CPU 0 to printk */ | |
7d7f9848 | 488 | set_cpu_online(smp_processor_id(), true); |
1da177e4 LT |
489 | #endif |
490 | } | |
491 | ||
a5b00bb4 H |
492 | static __initdata int nomca; |
493 | static __init int setup_nomca(char *s) | |
494 | { | |
495 | nomca = 1; | |
496 | return 0; | |
497 | } | |
498 | early_param("nomca", setup_nomca); | |
499 | ||
57cac4d1 | 500 | #ifdef CONFIG_CRASH_DUMP |
e088a4ad | 501 | int __init reserve_elfcorehdr(u64 *start, u64 *end) |
cee87af2 | 502 | { |
e088a4ad | 503 | u64 length; |
cee87af2 MD |
504 | |
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 | ||
85a0ee34 | 511 | if (!is_vmcore_usable()) |
cee87af2 MD |
512 | return -EINVAL; |
513 | ||
514 | if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) { | |
85a0ee34 | 515 | vmcore_unusable(); |
cee87af2 MD |
516 | return -EINVAL; |
517 | } | |
518 | ||
519 | *start = (unsigned long)__va(elfcorehdr_addr); | |
520 | *end = *start + length; | |
521 | return 0; | |
522 | } | |
523 | ||
45a98fc6 H |
524 | #endif /* CONFIG_PROC_VMCORE */ |
525 | ||
1da177e4 LT |
526 | void __init |
527 | setup_arch (char **cmdline_p) | |
528 | { | |
529 | unw_init(); | |
530 | ||
e51835d5 IY |
531 | paravirt_arch_setup_early(); |
532 | ||
1da177e4 | 533 | ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist); |
03f511dd | 534 | paravirt_patch_apply(); |
1da177e4 LT |
535 | |
536 | *cmdline_p = __va(ia64_boot_param->command_line); | |
a8d91b84 | 537 | strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); |
1da177e4 LT |
538 | |
539 | efi_init(); | |
540 | io_port_init(); | |
541 | ||
542 | #ifdef CONFIG_IA64_GENERIC | |
a07ee862 H |
543 | /* 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); | |
1da177e4 LT |
549 | #endif |
550 | ||
a07ee862 H |
551 | parse_early_param(); |
552 | ||
1da177e4 LT |
553 | if (early_console_setup(*cmdline_p) == 0) |
554 | mark_bsp_online(); | |
555 | ||
888ba6c6 | 556 | #ifdef CONFIG_ACPI |
1da177e4 LT |
557 | /* Initialize the ACPI boot-time table parser */ |
558 | acpi_table_init(); | |
62ee0540 | 559 | early_acpi_boot_init(); |
1da177e4 LT |
560 | # ifdef CONFIG_ACPI_NUMA |
561 | acpi_numa_init(); | |
12cda817 | 562 | # ifdef CONFIG_ACPI_HOTPLUG_CPU |
62ee0540 | 563 | prefill_possible_map(); |
12cda817 | 564 | # endif |
2c6e6db4 | 565 | per_cpu_scan_finalize((cpus_weight(early_cpu_possible_map) == 0 ? |
dd4f0888 TL |
566 | 32 : cpus_weight(early_cpu_possible_map)), |
567 | additional_cpus > 0 ? additional_cpus : 0); | |
1da177e4 | 568 | # endif |
1da177e4 LT |
569 | #endif /* CONFIG_APCI_BOOT */ |
570 | ||
12cda817 TH |
571 | #ifdef CONFIG_SMP |
572 | smp_build_cpu_map(); | |
573 | #endif | |
1da177e4 LT |
574 | find_memory(); |
575 | ||
576 | /* process SAL system table: */ | |
b2c99e3c | 577 | ia64_sal_init(__va(efi.sal_systab)); |
1da177e4 | 578 | |
4dcc29e1 TL |
579 | #ifdef CONFIG_ITANIUM |
580 | ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist); | |
581 | #else | |
582 | { | |
e088a4ad | 583 | unsigned long num_phys_stacked; |
4dcc29e1 TL |
584 | |
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 | ||
1da177e4 LT |
590 | #ifdef CONFIG_SMP |
591 | cpu_physical_id(0) = hard_smp_processor_id(); | |
592 | #endif | |
593 | ||
594 | cpu_init(); /* initialize the bootstrap CPU */ | |
dcc17d1b | 595 | mmu_context_init(); /* initialize context_id bitmap */ |
1da177e4 | 596 | |
e51835d5 IY |
597 | paravirt_banner(); |
598 | paravirt_arch_setup_console(cmdline_p); | |
599 | ||
1da177e4 LT |
600 | #ifdef CONFIG_VT |
601 | if (!conswitchp) { | |
602 | # if defined(CONFIG_DUMMY_CONSOLE) | |
603 | conswitchp = &dummy_con; | |
604 | # endif | |
605 | # if defined(CONFIG_VGA_CONSOLE) | |
606 | /* | |
607 | * Non-legacy systems may route legacy VGA MMIO range to system | |
608 | * memory. vga_con probes the MMIO hole, so memory looks like | |
609 | * a VGA device to it. The EFI memory map can tell us if it's | |
610 | * memory so we can avoid this problem. | |
611 | */ | |
612 | if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY) | |
613 | conswitchp = &vga_con; | |
614 | # endif | |
615 | } | |
616 | #endif | |
617 | ||
618 | /* enable IA-64 Machine Check Abort Handling unless disabled */ | |
e51835d5 IY |
619 | if (paravirt_arch_setup_nomca()) |
620 | nomca = 1; | |
a5b00bb4 | 621 | if (!nomca) |
1da177e4 LT |
622 | ia64_mca_init(); |
623 | ||
624 | platform_setup(cmdline_p); | |
06f95ea8 | 625 | #ifndef CONFIG_IA64_HP_SIM |
2826f8c0 | 626 | check_sal_cache_flush(); |
06f95ea8 | 627 | #endif |
1da177e4 LT |
628 | paging_init(); |
629 | } | |
630 | ||
631 | /* | |
72fdbdce | 632 | * Display cpu info for all CPUs. |
1da177e4 LT |
633 | */ |
634 | static int | |
635 | show_cpuinfo (struct seq_file *m, void *v) | |
636 | { | |
637 | #ifdef CONFIG_SMP | |
638 | # define lpj c->loops_per_jiffy | |
639 | # define cpunum c->cpu | |
640 | #else | |
641 | # define lpj loops_per_jiffy | |
642 | # define cpunum 0 | |
643 | #endif | |
644 | static struct { | |
645 | unsigned long mask; | |
646 | const char *feature_name; | |
647 | } feature_bits[] = { | |
648 | { 1UL << 0, "branchlong" }, | |
649 | { 1UL << 1, "spontaneous deferral"}, | |
650 | { 1UL << 2, "16-byte atomic ops" } | |
651 | }; | |
ae0af3e3 | 652 | char features[128], *cp, *sep; |
1da177e4 LT |
653 | struct cpuinfo_ia64 *c = v; |
654 | unsigned long mask; | |
38c0b2c2 | 655 | unsigned long proc_freq; |
ae0af3e3 | 656 | int i, size; |
1da177e4 LT |
657 | |
658 | mask = c->features; | |
659 | ||
1da177e4 | 660 | /* build the feature string: */ |
ae0af3e3 | 661 | memcpy(features, "standard", 9); |
1da177e4 | 662 | cp = features; |
ae0af3e3 AG |
663 | size = sizeof(features); |
664 | sep = ""; | |
665 | for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) { | |
1da177e4 | 666 | if (mask & feature_bits[i].mask) { |
ae0af3e3 AG |
667 | cp += snprintf(cp, size, "%s%s", sep, |
668 | feature_bits[i].feature_name), | |
669 | sep = ", "; | |
1da177e4 | 670 | mask &= ~feature_bits[i].mask; |
ae0af3e3 | 671 | size = sizeof(features) - (cp - features); |
1da177e4 LT |
672 | } |
673 | } | |
ae0af3e3 AG |
674 | if (mask && size > 1) { |
675 | /* print unknown features as a hex value */ | |
676 | snprintf(cp, size, "%s0x%lx", sep, mask); | |
1da177e4 LT |
677 | } |
678 | ||
95235ca2 VP |
679 | proc_freq = cpufreq_quick_get(cpunum); |
680 | if (!proc_freq) | |
681 | proc_freq = c->proc_freq / 1000; | |
682 | ||
1da177e4 LT |
683 | seq_printf(m, |
684 | "processor : %d\n" | |
685 | "vendor : %s\n" | |
686 | "arch : IA-64\n" | |
76d08bb3 | 687 | "family : %u\n" |
1da177e4 | 688 | "model : %u\n" |
76d08bb3 | 689 | "model name : %s\n" |
1da177e4 LT |
690 | "revision : %u\n" |
691 | "archrev : %u\n" | |
ae0af3e3 | 692 | "features : %s\n" |
1da177e4 LT |
693 | "cpu number : %lu\n" |
694 | "cpu regs : %u\n" | |
8a3a78d1 | 695 | "cpu MHz : %lu.%03lu\n" |
1da177e4 | 696 | "itc MHz : %lu.%06lu\n" |
e927ecb0 | 697 | "BogoMIPS : %lu.%02lu\n", |
76d08bb3 TL |
698 | cpunum, c->vendor, c->family, c->model, |
699 | c->model_name, c->revision, c->archrev, | |
1da177e4 | 700 | features, c->ppn, c->number, |
95235ca2 | 701 | proc_freq / 1000, proc_freq % 1000, |
1da177e4 LT |
702 | c->itc_freq / 1000000, c->itc_freq % 1000000, |
703 | lpj*HZ/500000, (lpj*HZ/5000) % 100); | |
e927ecb0 | 704 | #ifdef CONFIG_SMP |
ce6e71ad | 705 | seq_printf(m, "siblings : %u\n", cpus_weight(cpu_core_map[cpunum])); |
113134fc AC |
706 | if (c->socket_id != -1) |
707 | seq_printf(m, "physical id: %u\n", c->socket_id); | |
e927ecb0 SS |
708 | if (c->threads_per_core > 1 || c->cores_per_socket > 1) |
709 | seq_printf(m, | |
113134fc AC |
710 | "core id : %u\n" |
711 | "thread id : %u\n", | |
712 | c->core_id, c->thread_id); | |
e927ecb0 SS |
713 | #endif |
714 | seq_printf(m,"\n"); | |
715 | ||
1da177e4 LT |
716 | return 0; |
717 | } | |
718 | ||
719 | static void * | |
720 | c_start (struct seq_file *m, loff_t *pos) | |
721 | { | |
722 | #ifdef CONFIG_SMP | |
5dd3c994 | 723 | while (*pos < nr_cpu_ids && !cpu_online(*pos)) |
1da177e4 LT |
724 | ++*pos; |
725 | #endif | |
5dd3c994 | 726 | return *pos < nr_cpu_ids ? cpu_data(*pos) : NULL; |
1da177e4 LT |
727 | } |
728 | ||
729 | static void * | |
730 | c_next (struct seq_file *m, void *v, loff_t *pos) | |
731 | { | |
732 | ++*pos; | |
733 | return c_start(m, pos); | |
734 | } | |
735 | ||
736 | static void | |
737 | c_stop (struct seq_file *m, void *v) | |
738 | { | |
739 | } | |
740 | ||
a23fe55e | 741 | const struct seq_operations cpuinfo_op = { |
1da177e4 LT |
742 | .start = c_start, |
743 | .next = c_next, | |
744 | .stop = c_stop, | |
745 | .show = show_cpuinfo | |
746 | }; | |
747 | ||
c5e83e3f JS |
748 | #define MAX_BRANDS 8 |
749 | static char brandname[MAX_BRANDS][128]; | |
76d08bb3 | 750 | |
ccce9bb8 | 751 | static char * |
76d08bb3 TL |
752 | get_model_name(__u8 family, __u8 model) |
753 | { | |
c5e83e3f | 754 | static int overflow; |
76d08bb3 | 755 | char brand[128]; |
c5e83e3f | 756 | int i; |
76d08bb3 | 757 | |
75f6a1de | 758 | memcpy(brand, "Unknown", 8); |
76d08bb3 TL |
759 | if (ia64_pal_get_brand_info(brand)) { |
760 | if (family == 0x7) | |
761 | memcpy(brand, "Merced", 7); | |
762 | else if (family == 0x1f) switch (model) { | |
763 | case 0: memcpy(brand, "McKinley", 9); break; | |
764 | case 1: memcpy(brand, "Madison", 8); break; | |
765 | case 2: memcpy(brand, "Madison up to 9M cache", 23); break; | |
75f6a1de | 766 | } |
76d08bb3 | 767 | } |
c5e83e3f JS |
768 | for (i = 0; i < MAX_BRANDS; i++) |
769 | if (strcmp(brandname[i], brand) == 0) | |
770 | return brandname[i]; | |
771 | for (i = 0; i < MAX_BRANDS; i++) | |
772 | if (brandname[i][0] == '\0') | |
773 | return strcpy(brandname[i], brand); | |
774 | if (overflow++ == 0) | |
775 | printk(KERN_ERR | |
776 | "%s: Table overflow. Some processor model information will be missing\n", | |
d4ed8084 | 777 | __func__); |
c5e83e3f | 778 | return "Unknown"; |
76d08bb3 TL |
779 | } |
780 | ||
ccce9bb8 | 781 | static void |
1da177e4 LT |
782 | identify_cpu (struct cpuinfo_ia64 *c) |
783 | { | |
784 | union { | |
785 | unsigned long bits[5]; | |
786 | struct { | |
787 | /* id 0 & 1: */ | |
788 | char vendor[16]; | |
789 | ||
790 | /* id 2 */ | |
791 | u64 ppn; /* processor serial number */ | |
792 | ||
793 | /* id 3: */ | |
794 | unsigned number : 8; | |
795 | unsigned revision : 8; | |
796 | unsigned model : 8; | |
797 | unsigned family : 8; | |
798 | unsigned archrev : 8; | |
799 | unsigned reserved : 24; | |
800 | ||
801 | /* id 4: */ | |
802 | u64 features; | |
803 | } field; | |
804 | } cpuid; | |
805 | pal_vm_info_1_u_t vm1; | |
806 | pal_vm_info_2_u_t vm2; | |
807 | pal_status_t status; | |
808 | unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */ | |
809 | int i; | |
1da177e4 LT |
810 | for (i = 0; i < 5; ++i) |
811 | cpuid.bits[i] = ia64_get_cpuid(i); | |
812 | ||
813 | memcpy(c->vendor, cpuid.field.vendor, 16); | |
814 | #ifdef CONFIG_SMP | |
815 | c->cpu = smp_processor_id(); | |
e927ecb0 SS |
816 | |
817 | /* below default values will be overwritten by identify_siblings() | |
72fdbdce | 818 | * for Multi-Threading/Multi-Core capable CPUs |
e927ecb0 SS |
819 | */ |
820 | c->threads_per_core = c->cores_per_socket = c->num_log = 1; | |
821 | c->socket_id = -1; | |
822 | ||
823 | identify_siblings(c); | |
113134fc AC |
824 | |
825 | if (c->threads_per_core > smp_num_siblings) | |
826 | smp_num_siblings = c->threads_per_core; | |
1da177e4 LT |
827 | #endif |
828 | c->ppn = cpuid.field.ppn; | |
829 | c->number = cpuid.field.number; | |
830 | c->revision = cpuid.field.revision; | |
831 | c->model = cpuid.field.model; | |
832 | c->family = cpuid.field.family; | |
833 | c->archrev = cpuid.field.archrev; | |
834 | c->features = cpuid.field.features; | |
76d08bb3 | 835 | c->model_name = get_model_name(c->family, c->model); |
1da177e4 LT |
836 | |
837 | status = ia64_pal_vm_summary(&vm1, &vm2); | |
838 | if (status == PAL_STATUS_SUCCESS) { | |
839 | impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb; | |
840 | phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size; | |
841 | } | |
842 | c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1)); | |
843 | c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1)); | |
844 | } | |
845 | ||
08357f82 | 846 | /* |
62fdd767 | 847 | * Do the following calculations: |
08357f82 | 848 | * |
62fdd767 FY |
849 | * 1. the max. cache line size. |
850 | * 2. the minimum of the i-cache stride sizes for "flush_icache_range()". | |
851 | * 3. the minimum of the cache stride sizes for "clflush_cache_range()". | |
08357f82 | 852 | */ |
ccce9bb8 | 853 | static void |
62fdd767 | 854 | get_cache_info(void) |
1da177e4 LT |
855 | { |
856 | unsigned long line_size, max = 1; | |
e088a4ad MW |
857 | unsigned long l, levels, unique_caches; |
858 | pal_cache_config_info_t cci; | |
859 | long status; | |
1da177e4 LT |
860 | |
861 | status = ia64_pal_cache_summary(&levels, &unique_caches); | |
862 | if (status != 0) { | |
863 | printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n", | |
d4ed8084 | 864 | __func__, status); |
1da177e4 | 865 | max = SMP_CACHE_BYTES; |
08357f82 ZM |
866 | /* Safest setup for "flush_icache_range()" */ |
867 | ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT; | |
62fdd767 FY |
868 | /* Safest setup for "clflush_cache_range()" */ |
869 | ia64_cache_stride_shift = CACHE_STRIDE_SHIFT; | |
1da177e4 LT |
870 | goto out; |
871 | } | |
872 | ||
873 | for (l = 0; l < levels; ++l) { | |
62fdd767 FY |
874 | /* cache_type (data_or_unified)=2 */ |
875 | status = ia64_pal_cache_config_info(l, 2, &cci); | |
1da177e4 | 876 | if (status != 0) { |
e088a4ad MW |
877 | printk(KERN_ERR "%s: ia64_pal_cache_config_info" |
878 | "(l=%lu, 2) failed (status=%ld)\n", | |
879 | __func__, l, status); | |
1da177e4 | 880 | max = SMP_CACHE_BYTES; |
08357f82 ZM |
881 | /* The safest setup for "flush_icache_range()" */ |
882 | cci.pcci_stride = I_CACHE_STRIDE_SHIFT; | |
62fdd767 FY |
883 | /* The safest setup for "clflush_cache_range()" */ |
884 | ia64_cache_stride_shift = CACHE_STRIDE_SHIFT; | |
08357f82 | 885 | cci.pcci_unified = 1; |
62fdd767 FY |
886 | } else { |
887 | if (cci.pcci_stride < ia64_cache_stride_shift) | |
888 | ia64_cache_stride_shift = cci.pcci_stride; | |
889 | ||
890 | line_size = 1 << cci.pcci_line_size; | |
891 | if (line_size > max) | |
892 | max = line_size; | |
1da177e4 | 893 | } |
62fdd767 | 894 | |
08357f82 | 895 | if (!cci.pcci_unified) { |
62fdd767 FY |
896 | /* cache_type (instruction)=1*/ |
897 | status = ia64_pal_cache_config_info(l, 1, &cci); | |
08357f82 | 898 | if (status != 0) { |
e088a4ad MW |
899 | printk(KERN_ERR "%s: ia64_pal_cache_config_info" |
900 | "(l=%lu, 1) failed (status=%ld)\n", | |
d4ed8084 | 901 | __func__, l, status); |
e088a4ad | 902 | /* The safest setup for flush_icache_range() */ |
08357f82 ZM |
903 | cci.pcci_stride = I_CACHE_STRIDE_SHIFT; |
904 | } | |
905 | } | |
906 | if (cci.pcci_stride < ia64_i_cache_stride_shift) | |
907 | ia64_i_cache_stride_shift = cci.pcci_stride; | |
908 | } | |
1da177e4 LT |
909 | out: |
910 | if (max > ia64_max_cacheline_size) | |
911 | ia64_max_cacheline_size = max; | |
912 | } | |
913 | ||
914 | /* | |
915 | * cpu_init() initializes state that is per-CPU. This function acts | |
916 | * as a 'CPU state barrier', nothing should get across. | |
917 | */ | |
ccce9bb8 | 918 | void |
1da177e4 LT |
919 | cpu_init (void) |
920 | { | |
ccce9bb8 | 921 | extern void ia64_mmu_init(void *); |
a0776ec8 | 922 | static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG; |
1da177e4 LT |
923 | unsigned long num_phys_stacked; |
924 | pal_vm_info_2_u_t vmi; | |
925 | unsigned int max_ctx; | |
926 | struct cpuinfo_ia64 *cpu_info; | |
927 | void *cpu_data; | |
928 | ||
929 | cpu_data = per_cpu_init(); | |
4d1efed5 | 930 | #ifdef CONFIG_SMP |
d5a7430d MT |
931 | /* |
932 | * insert boot cpu into sibling and core mapes | |
933 | * (must be done after per_cpu area is setup) | |
934 | */ | |
935 | if (smp_processor_id() == 0) { | |
936 | cpu_set(0, per_cpu(cpu_sibling_map, 0)); | |
937 | cpu_set(0, cpu_core_map[0]); | |
10617bbe TL |
938 | } else { |
939 | /* | |
940 | * Set ar.k3 so that assembly code in MCA handler can compute | |
941 | * physical addresses of per cpu variables with a simple: | |
942 | * phys = ar.k3 + &per_cpu_var | |
943 | * and the alt-dtlb-miss handler can set per-cpu mapping into | |
944 | * the TLB when needed. head.S already did this for cpu0. | |
945 | */ | |
946 | ia64_set_kr(IA64_KR_PER_CPU_DATA, | |
947 | ia64_tpa(cpu_data) - (long) __per_cpu_start); | |
d5a7430d | 948 | } |
4d1efed5 | 949 | #endif |
1da177e4 | 950 | |
62fdd767 | 951 | get_cache_info(); |
1da177e4 LT |
952 | |
953 | /* | |
954 | * We can't pass "local_cpu_data" to identify_cpu() because we haven't called | |
955 | * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it | |
956 | * depends on the data returned by identify_cpu(). We break the dependency by | |
957 | * accessing cpu_data() through the canonical per-CPU address. | |
958 | */ | |
877105cc | 959 | cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start); |
1da177e4 LT |
960 | identify_cpu(cpu_info); |
961 | ||
962 | #ifdef CONFIG_MCKINLEY | |
963 | { | |
964 | # define FEATURE_SET 16 | |
965 | struct ia64_pal_retval iprv; | |
966 | ||
967 | if (cpu_info->family == 0x1f) { | |
968 | PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0); | |
969 | if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80)) | |
970 | PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES, | |
971 | (iprv.v1 | 0x80), FEATURE_SET, 0); | |
972 | } | |
973 | } | |
974 | #endif | |
975 | ||
976 | /* Clear the stack memory reserved for pt_regs: */ | |
6450578f | 977 | memset(task_pt_regs(current), 0, sizeof(struct pt_regs)); |
1da177e4 LT |
978 | |
979 | ia64_set_kr(IA64_KR_FPU_OWNER, 0); | |
980 | ||
981 | /* | |
982 | * Initialize the page-table base register to a global | |
983 | * directory with all zeroes. This ensure that we can handle | |
984 | * TLB-misses to user address-space even before we created the | |
985 | * first user address-space. This may happen, e.g., due to | |
986 | * aggressive use of lfetch.fault. | |
987 | */ | |
988 | ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page))); | |
989 | ||
990 | /* | |
86ebacd3 TL |
991 | * Initialize default control register to defer speculative faults except |
992 | * for those arising from TLB misses, which are not deferred. The | |
1da177e4 LT |
993 | * kernel MUST NOT depend on a particular setting of these bits (in other words, |
994 | * the kernel must have recovery code for all speculative accesses). Turn on | |
995 | * dcr.lc as per recommendation by the architecture team. Most IA-32 apps | |
996 | * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll | |
997 | * be fine). | |
998 | */ | |
999 | ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR | |
1000 | | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC)); | |
1001 | atomic_inc(&init_mm.mm_count); | |
1002 | current->active_mm = &init_mm; | |
80a03e29 | 1003 | BUG_ON(current->mm); |
1da177e4 LT |
1004 | |
1005 | ia64_mmu_init(ia64_imva(cpu_data)); | |
1006 | ia64_mca_cpu_init(ia64_imva(cpu_data)); | |
1007 | ||
72fdbdce | 1008 | /* Clear ITC to eliminate sched_clock() overflows in human time. */ |
1da177e4 LT |
1009 | ia64_set_itc(0); |
1010 | ||
1011 | /* disable all local interrupt sources: */ | |
1012 | ia64_set_itv(1 << 16); | |
1013 | ia64_set_lrr0(1 << 16); | |
1014 | ia64_set_lrr1(1 << 16); | |
1015 | ia64_setreg(_IA64_REG_CR_PMV, 1 << 16); | |
1016 | ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16); | |
1017 | ||
1018 | /* clear TPR & XTP to enable all interrupt classes: */ | |
1019 | ia64_setreg(_IA64_REG_CR_TPR, 0); | |
f740e6c9 KK |
1020 | |
1021 | /* Clear any pending interrupts left by SAL/EFI */ | |
1022 | while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) | |
1023 | ia64_eoi(); | |
1024 | ||
1da177e4 LT |
1025 | #ifdef CONFIG_SMP |
1026 | normal_xtp(); | |
1027 | #endif | |
1028 | ||
1029 | /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */ | |
2046b94e | 1030 | if (ia64_pal_vm_summary(NULL, &vmi) == 0) { |
1da177e4 | 1031 | max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1; |
a6c75b86 | 1032 | setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL); |
2046b94e | 1033 | } else { |
1da177e4 LT |
1034 | printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n"); |
1035 | max_ctx = (1U << 15) - 1; /* use architected minimum */ | |
1036 | } | |
1037 | while (max_ctx < ia64_ctx.max_ctx) { | |
1038 | unsigned int old = ia64_ctx.max_ctx; | |
1039 | if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old) | |
1040 | break; | |
1041 | } | |
1042 | ||
1043 | if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) { | |
1044 | printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical " | |
1045 | "stacked regs\n"); | |
1046 | num_phys_stacked = 96; | |
1047 | } | |
1048 | /* size of physical stacked register partition plus 8 bytes: */ | |
a0776ec8 CK |
1049 | if (num_phys_stacked > max_num_phys_stacked) { |
1050 | ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8); | |
1051 | max_num_phys_stacked = num_phys_stacked; | |
1052 | } | |
1da177e4 LT |
1053 | platform_cpu_init(); |
1054 | } | |
1055 | ||
244fd545 | 1056 | void __init |
1da177e4 LT |
1057 | check_bugs (void) |
1058 | { | |
1059 | ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles, | |
1060 | (unsigned long) __end___mckinley_e9_bundles); | |
1061 | } | |
3ed3bce8 MD |
1062 | |
1063 | static int __init run_dmi_scan(void) | |
1064 | { | |
1065 | dmi_scan_machine(); | |
dd6dad42 | 1066 | dmi_memdev_walk(); |
98e5e1bf | 1067 | dmi_set_dump_stack_arch_desc(); |
3ed3bce8 MD |
1068 | return 0; |
1069 | } | |
1070 | core_initcall(run_dmi_scan); |