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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 LT |
48 | |
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> | |
1da177e4 LT |
59 | #include <asm/setup.h> |
60 | #include <asm/smp.h> | |
61 | #include <asm/system.h> | |
62 | #include <asm/unistd.h> | |
8b713c67 | 63 | #include <asm/hpsim.h> |
1da177e4 LT |
64 | |
65 | #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE) | |
66 | # error "struct cpuinfo_ia64 too big!" | |
67 | #endif | |
68 | ||
69 | #ifdef CONFIG_SMP | |
70 | unsigned long __per_cpu_offset[NR_CPUS]; | |
71 | EXPORT_SYMBOL(__per_cpu_offset); | |
72 | #endif | |
73 | ||
74 | DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info); | |
75 | DEFINE_PER_CPU(unsigned long, local_per_cpu_offset); | |
1da177e4 LT |
76 | unsigned long ia64_cycles_per_usec; |
77 | struct ia64_boot_param *ia64_boot_param; | |
78 | struct screen_info screen_info; | |
66b7f8a3 MM |
79 | unsigned long vga_console_iobase; |
80 | unsigned long vga_console_membase; | |
1da177e4 | 81 | |
be379124 KA |
82 | static struct resource data_resource = { |
83 | .name = "Kernel data", | |
84 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
85 | }; | |
86 | ||
87 | static struct resource code_resource = { | |
88 | .name = "Kernel code", | |
89 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
90 | }; | |
00bf4098 BW |
91 | |
92 | static struct resource bss_resource = { | |
93 | .name = "Kernel bss", | |
94 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
95 | }; | |
be379124 | 96 | |
1da177e4 | 97 | unsigned long ia64_max_cacheline_size; |
e1531b42 JL |
98 | |
99 | int dma_get_cache_alignment(void) | |
100 | { | |
101 | return ia64_max_cacheline_size; | |
102 | } | |
103 | EXPORT_SYMBOL(dma_get_cache_alignment); | |
104 | ||
1da177e4 LT |
105 | unsigned long ia64_iobase; /* virtual address for I/O accesses */ |
106 | EXPORT_SYMBOL(ia64_iobase); | |
107 | struct io_space io_space[MAX_IO_SPACES]; | |
108 | EXPORT_SYMBOL(io_space); | |
109 | unsigned int num_io_spaces; | |
110 | ||
08357f82 ZM |
111 | /* |
112 | * "flush_icache_range()" needs to know what processor dependent stride size to use | |
113 | * when it makes i-cache(s) coherent with d-caches. | |
114 | */ | |
115 | #define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */ | |
116 | unsigned long ia64_i_cache_stride_shift = ~0; | |
117 | ||
1da177e4 LT |
118 | /* |
119 | * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This | |
120 | * mask specifies a mask of address bits that must be 0 in order for two buffers to be | |
121 | * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start | |
122 | * address of the second buffer must be aligned to (merge_mask+1) in order to be | |
123 | * mergeable). By default, we assume there is no I/O MMU which can merge physically | |
124 | * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu | |
125 | * page-size of 2^64. | |
126 | */ | |
127 | unsigned long ia64_max_iommu_merge_mask = ~0UL; | |
128 | EXPORT_SYMBOL(ia64_max_iommu_merge_mask); | |
129 | ||
130 | /* | |
131 | * We use a special marker for the end of memory and it uses the extra (+1) slot | |
132 | */ | |
dae28066 KC |
133 | struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata; |
134 | int num_rsvd_regions __initdata; | |
1da177e4 LT |
135 | |
136 | ||
137 | /* | |
138 | * Filter incoming memory segments based on the primitive map created from the boot | |
139 | * parameters. Segments contained in the map are removed from the memory ranges. A | |
140 | * caller-specified function is called with the memory ranges that remain after filtering. | |
141 | * This routine does not assume the incoming segments are sorted. | |
142 | */ | |
dae28066 | 143 | int __init |
1da177e4 LT |
144 | filter_rsvd_memory (unsigned long start, unsigned long end, void *arg) |
145 | { | |
146 | unsigned long range_start, range_end, prev_start; | |
147 | void (*func)(unsigned long, unsigned long, int); | |
148 | int i; | |
149 | ||
150 | #if IGNORE_PFN0 | |
151 | if (start == PAGE_OFFSET) { | |
152 | printk(KERN_WARNING "warning: skipping physical page 0\n"); | |
153 | start += PAGE_SIZE; | |
154 | if (start >= end) return 0; | |
155 | } | |
156 | #endif | |
157 | /* | |
158 | * lowest possible address(walker uses virtual) | |
159 | */ | |
160 | prev_start = PAGE_OFFSET; | |
161 | func = arg; | |
162 | ||
163 | for (i = 0; i < num_rsvd_regions; ++i) { | |
164 | range_start = max(start, prev_start); | |
165 | range_end = min(end, rsvd_region[i].start); | |
166 | ||
167 | if (range_start < range_end) | |
168 | call_pernode_memory(__pa(range_start), range_end - range_start, func); | |
169 | ||
170 | /* nothing more available in this segment */ | |
171 | if (range_end == end) return 0; | |
172 | ||
173 | prev_start = rsvd_region[i].end; | |
174 | } | |
175 | /* end of memory marker allows full processing inside loop body */ | |
176 | return 0; | |
177 | } | |
178 | ||
dae28066 | 179 | static void __init |
1da177e4 LT |
180 | sort_regions (struct rsvd_region *rsvd_region, int max) |
181 | { | |
182 | int j; | |
183 | ||
184 | /* simple bubble sorting */ | |
185 | while (max--) { | |
186 | for (j = 0; j < max; ++j) { | |
187 | if (rsvd_region[j].start > rsvd_region[j+1].start) { | |
188 | struct rsvd_region tmp; | |
189 | tmp = rsvd_region[j]; | |
190 | rsvd_region[j] = rsvd_region[j + 1]; | |
191 | rsvd_region[j + 1] = tmp; | |
192 | } | |
193 | } | |
194 | } | |
195 | } | |
196 | ||
be379124 KA |
197 | /* |
198 | * Request address space for all standard resources | |
199 | */ | |
200 | static int __init register_memory(void) | |
201 | { | |
202 | code_resource.start = ia64_tpa(_text); | |
203 | code_resource.end = ia64_tpa(_etext) - 1; | |
204 | data_resource.start = ia64_tpa(_etext); | |
00bf4098 | 205 | data_resource.end = ia64_tpa(_edata) - 1; |
b898a424 | 206 | bss_resource.start = ia64_tpa(__bss_start); |
00bf4098 BW |
207 | bss_resource.end = ia64_tpa(_end) - 1; |
208 | efi_initialize_iomem_resources(&code_resource, &data_resource, | |
209 | &bss_resource); | |
be379124 KA |
210 | |
211 | return 0; | |
212 | } | |
213 | ||
214 | __initcall(register_memory); | |
215 | ||
cb380853 BW |
216 | |
217 | #ifdef CONFIG_KEXEC | |
218 | static void __init setup_crashkernel(unsigned long total, int *n) | |
219 | { | |
220 | unsigned long long base = 0, size = 0; | |
221 | int ret; | |
222 | ||
223 | ret = parse_crashkernel(boot_command_line, total, | |
224 | &size, &base); | |
225 | if (ret == 0 && size > 0) { | |
226 | if (!base) { | |
227 | sort_regions(rsvd_region, *n); | |
228 | base = kdump_find_rsvd_region(size, | |
229 | rsvd_region, *n); | |
230 | } | |
231 | if (base != ~0UL) { | |
232 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
233 | "for crashkernel (System RAM: %ldMB)\n", | |
234 | (unsigned long)(size >> 20), | |
235 | (unsigned long)(base >> 20), | |
236 | (unsigned long)(total >> 20)); | |
237 | rsvd_region[*n].start = | |
238 | (unsigned long)__va(base); | |
239 | rsvd_region[*n].end = | |
240 | (unsigned long)__va(base + size); | |
241 | (*n)++; | |
242 | crashk_res.start = base; | |
243 | crashk_res.end = base + size - 1; | |
244 | } | |
245 | } | |
246 | efi_memmap_res.start = ia64_boot_param->efi_memmap; | |
247 | efi_memmap_res.end = efi_memmap_res.start + | |
248 | ia64_boot_param->efi_memmap_size; | |
249 | boot_param_res.start = __pa(ia64_boot_param); | |
250 | boot_param_res.end = boot_param_res.start + | |
251 | sizeof(*ia64_boot_param); | |
252 | } | |
253 | #else | |
254 | static inline void __init setup_crashkernel(unsigned long total, int *n) | |
255 | {} | |
256 | #endif | |
257 | ||
1da177e4 LT |
258 | /** |
259 | * reserve_memory - setup reserved memory areas | |
260 | * | |
261 | * Setup the reserved memory areas set aside for the boot parameters, | |
262 | * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined, | |
263 | * see include/asm-ia64/meminit.h if you need to define more. | |
264 | */ | |
dae28066 | 265 | void __init |
1da177e4 LT |
266 | reserve_memory (void) |
267 | { | |
268 | int n = 0; | |
cb380853 | 269 | unsigned long total_memory; |
1da177e4 LT |
270 | |
271 | /* | |
272 | * none of the entries in this table overlap | |
273 | */ | |
274 | rsvd_region[n].start = (unsigned long) ia64_boot_param; | |
275 | rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param); | |
276 | n++; | |
277 | ||
278 | rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap); | |
279 | rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size; | |
280 | n++; | |
281 | ||
282 | rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line); | |
283 | rsvd_region[n].end = (rsvd_region[n].start | |
284 | + strlen(__va(ia64_boot_param->command_line)) + 1); | |
285 | n++; | |
286 | ||
287 | rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START); | |
288 | rsvd_region[n].end = (unsigned long) ia64_imva(_end); | |
289 | n++; | |
290 | ||
291 | #ifdef CONFIG_BLK_DEV_INITRD | |
292 | if (ia64_boot_param->initrd_start) { | |
293 | rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start); | |
294 | rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size; | |
295 | n++; | |
296 | } | |
297 | #endif | |
298 | ||
cee87af2 MD |
299 | #ifdef CONFIG_PROC_VMCORE |
300 | if (reserve_elfcorehdr(&rsvd_region[n].start, | |
301 | &rsvd_region[n].end) == 0) | |
302 | n++; | |
303 | #endif | |
304 | ||
cb380853 | 305 | total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); |
d8c97d5f TL |
306 | n++; |
307 | ||
cb380853 BW |
308 | setup_crashkernel(total_memory, &n); |
309 | ||
1da177e4 LT |
310 | /* end of memory marker */ |
311 | rsvd_region[n].start = ~0UL; | |
312 | rsvd_region[n].end = ~0UL; | |
313 | n++; | |
314 | ||
315 | num_rsvd_regions = n; | |
5eb1d63f | 316 | BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n); |
1da177e4 LT |
317 | |
318 | sort_regions(rsvd_region, num_rsvd_regions); | |
319 | } | |
320 | ||
a7956113 | 321 | |
1da177e4 LT |
322 | /** |
323 | * find_initrd - get initrd parameters from the boot parameter structure | |
324 | * | |
325 | * Grab the initrd start and end from the boot parameter struct given us by | |
326 | * the boot loader. | |
327 | */ | |
dae28066 | 328 | void __init |
1da177e4 LT |
329 | find_initrd (void) |
330 | { | |
331 | #ifdef CONFIG_BLK_DEV_INITRD | |
332 | if (ia64_boot_param->initrd_start) { | |
333 | initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start); | |
334 | initrd_end = initrd_start+ia64_boot_param->initrd_size; | |
335 | ||
336 | printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n", | |
337 | initrd_start, ia64_boot_param->initrd_size); | |
338 | } | |
339 | #endif | |
340 | } | |
341 | ||
342 | static void __init | |
343 | io_port_init (void) | |
344 | { | |
1da177e4 LT |
345 | unsigned long phys_iobase; |
346 | ||
347 | /* | |
44c45120 BH |
348 | * Set `iobase' based on the EFI memory map or, failing that, the |
349 | * value firmware left in ar.k0. | |
1da177e4 | 350 | * |
44c45120 BH |
351 | * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute |
352 | * the port's virtual address, so ia32_load_state() loads it with a | |
353 | * user virtual address. But in ia64 mode, glibc uses the | |
354 | * *physical* address in ar.k0 to mmap the appropriate area from | |
355 | * /dev/mem, and the inX()/outX() interfaces use MMIO. In both | |
356 | * cases, user-mode can only use the legacy 0-64K I/O port space. | |
357 | * | |
358 | * ar.k0 is not involved in kernel I/O port accesses, which can use | |
359 | * any of the I/O port spaces and are done via MMIO using the | |
360 | * virtual mmio_base from the appropriate io_space[]. | |
1da177e4 LT |
361 | */ |
362 | phys_iobase = efi_get_iobase(); | |
44c45120 | 363 | if (!phys_iobase) { |
1da177e4 | 364 | phys_iobase = ia64_get_kr(IA64_KR_IO_BASE); |
44c45120 BH |
365 | printk(KERN_INFO "No I/O port range found in EFI memory map, " |
366 | "falling back to AR.KR0 (0x%lx)\n", phys_iobase); | |
1da177e4 LT |
367 | } |
368 | ia64_iobase = (unsigned long) ioremap(phys_iobase, 0); | |
44c45120 | 369 | ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase)); |
1da177e4 LT |
370 | |
371 | /* setup legacy IO port space */ | |
372 | io_space[0].mmio_base = ia64_iobase; | |
373 | io_space[0].sparse = 1; | |
374 | num_io_spaces = 1; | |
375 | } | |
376 | ||
377 | /** | |
378 | * early_console_setup - setup debugging console | |
379 | * | |
380 | * Consoles started here require little enough setup that we can start using | |
381 | * them very early in the boot process, either right after the machine | |
382 | * vector initialization, or even before if the drivers can detect their hw. | |
383 | * | |
384 | * Returns non-zero if a console couldn't be setup. | |
385 | */ | |
386 | static inline int __init | |
387 | early_console_setup (char *cmdline) | |
388 | { | |
66b7f8a3 MM |
389 | int earlycons = 0; |
390 | ||
1da177e4 LT |
391 | #ifdef CONFIG_SERIAL_SGI_L1_CONSOLE |
392 | { | |
393 | extern int sn_serial_console_early_setup(void); | |
394 | if (!sn_serial_console_early_setup()) | |
66b7f8a3 | 395 | earlycons++; |
1da177e4 LT |
396 | } |
397 | #endif | |
398 | #ifdef CONFIG_EFI_PCDP | |
399 | if (!efi_setup_pcdp_console(cmdline)) | |
66b7f8a3 | 400 | earlycons++; |
1da177e4 | 401 | #endif |
8b713c67 | 402 | if (!simcons_register()) |
471e7a44 | 403 | earlycons++; |
1da177e4 | 404 | |
66b7f8a3 | 405 | return (earlycons) ? 0 : -1; |
1da177e4 LT |
406 | } |
407 | ||
408 | static inline void | |
409 | mark_bsp_online (void) | |
410 | { | |
411 | #ifdef CONFIG_SMP | |
412 | /* If we register an early console, allow CPU 0 to printk */ | |
413 | cpu_set(smp_processor_id(), cpu_online_map); | |
414 | #endif | |
415 | } | |
416 | ||
a5b00bb4 H |
417 | static __initdata int nomca; |
418 | static __init int setup_nomca(char *s) | |
419 | { | |
420 | nomca = 1; | |
421 | return 0; | |
422 | } | |
423 | early_param("nomca", setup_nomca); | |
424 | ||
45a98fc6 H |
425 | #ifdef CONFIG_PROC_VMCORE |
426 | /* elfcorehdr= specifies the location of elf core header | |
427 | * stored by the crashed kernel. | |
428 | */ | |
429 | static int __init parse_elfcorehdr(char *arg) | |
430 | { | |
431 | if (!arg) | |
432 | return -EINVAL; | |
433 | ||
434 | elfcorehdr_addr = memparse(arg, &arg); | |
435 | return 0; | |
436 | } | |
437 | early_param("elfcorehdr", parse_elfcorehdr); | |
cee87af2 MD |
438 | |
439 | int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end) | |
440 | { | |
441 | unsigned long length; | |
442 | ||
443 | /* We get the address using the kernel command line, | |
444 | * but the size is extracted from the EFI tables. | |
445 | * Both address and size are required for reservation | |
446 | * to work properly. | |
447 | */ | |
448 | ||
449 | if (elfcorehdr_addr >= ELFCORE_ADDR_MAX) | |
450 | return -EINVAL; | |
451 | ||
452 | if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) { | |
453 | elfcorehdr_addr = ELFCORE_ADDR_MAX; | |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | *start = (unsigned long)__va(elfcorehdr_addr); | |
458 | *end = *start + length; | |
459 | return 0; | |
460 | } | |
461 | ||
45a98fc6 H |
462 | #endif /* CONFIG_PROC_VMCORE */ |
463 | ||
1da177e4 LT |
464 | void __init |
465 | setup_arch (char **cmdline_p) | |
466 | { | |
467 | unw_init(); | |
468 | ||
469 | ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist); | |
470 | ||
471 | *cmdline_p = __va(ia64_boot_param->command_line); | |
a8d91b84 | 472 | strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); |
1da177e4 LT |
473 | |
474 | efi_init(); | |
475 | io_port_init(); | |
476 | ||
477 | #ifdef CONFIG_IA64_GENERIC | |
a07ee862 H |
478 | /* machvec needs to be parsed from the command line |
479 | * before parse_early_param() is called to ensure | |
480 | * that ia64_mv is initialised before any command line | |
481 | * settings may cause console setup to occur | |
482 | */ | |
483 | machvec_init_from_cmdline(*cmdline_p); | |
1da177e4 LT |
484 | #endif |
485 | ||
a07ee862 H |
486 | parse_early_param(); |
487 | ||
1da177e4 LT |
488 | if (early_console_setup(*cmdline_p) == 0) |
489 | mark_bsp_online(); | |
490 | ||
888ba6c6 | 491 | #ifdef CONFIG_ACPI |
1da177e4 LT |
492 | /* Initialize the ACPI boot-time table parser */ |
493 | acpi_table_init(); | |
494 | # ifdef CONFIG_ACPI_NUMA | |
495 | acpi_numa_init(); | |
496 | # endif | |
497 | #else | |
498 | # ifdef CONFIG_SMP | |
499 | smp_build_cpu_map(); /* happens, e.g., with the Ski simulator */ | |
500 | # endif | |
501 | #endif /* CONFIG_APCI_BOOT */ | |
502 | ||
503 | find_memory(); | |
504 | ||
505 | /* process SAL system table: */ | |
b2c99e3c | 506 | ia64_sal_init(__va(efi.sal_systab)); |
1da177e4 LT |
507 | |
508 | #ifdef CONFIG_SMP | |
509 | cpu_physical_id(0) = hard_smp_processor_id(); | |
510 | #endif | |
511 | ||
512 | cpu_init(); /* initialize the bootstrap CPU */ | |
dcc17d1b | 513 | mmu_context_init(); /* initialize context_id bitmap */ |
1da177e4 | 514 | |
fa1d19e5 TH |
515 | check_sal_cache_flush(); |
516 | ||
888ba6c6 | 517 | #ifdef CONFIG_ACPI |
1da177e4 LT |
518 | acpi_boot_init(); |
519 | #endif | |
520 | ||
521 | #ifdef CONFIG_VT | |
522 | if (!conswitchp) { | |
523 | # if defined(CONFIG_DUMMY_CONSOLE) | |
524 | conswitchp = &dummy_con; | |
525 | # endif | |
526 | # if defined(CONFIG_VGA_CONSOLE) | |
527 | /* | |
528 | * Non-legacy systems may route legacy VGA MMIO range to system | |
529 | * memory. vga_con probes the MMIO hole, so memory looks like | |
530 | * a VGA device to it. The EFI memory map can tell us if it's | |
531 | * memory so we can avoid this problem. | |
532 | */ | |
533 | if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY) | |
534 | conswitchp = &vga_con; | |
535 | # endif | |
536 | } | |
537 | #endif | |
538 | ||
539 | /* enable IA-64 Machine Check Abort Handling unless disabled */ | |
a5b00bb4 | 540 | if (!nomca) |
1da177e4 LT |
541 | ia64_mca_init(); |
542 | ||
543 | platform_setup(cmdline_p); | |
544 | paging_init(); | |
545 | } | |
546 | ||
547 | /* | |
72fdbdce | 548 | * Display cpu info for all CPUs. |
1da177e4 LT |
549 | */ |
550 | static int | |
551 | show_cpuinfo (struct seq_file *m, void *v) | |
552 | { | |
553 | #ifdef CONFIG_SMP | |
554 | # define lpj c->loops_per_jiffy | |
555 | # define cpunum c->cpu | |
556 | #else | |
557 | # define lpj loops_per_jiffy | |
558 | # define cpunum 0 | |
559 | #endif | |
560 | static struct { | |
561 | unsigned long mask; | |
562 | const char *feature_name; | |
563 | } feature_bits[] = { | |
564 | { 1UL << 0, "branchlong" }, | |
565 | { 1UL << 1, "spontaneous deferral"}, | |
566 | { 1UL << 2, "16-byte atomic ops" } | |
567 | }; | |
ae0af3e3 | 568 | char features[128], *cp, *sep; |
1da177e4 LT |
569 | struct cpuinfo_ia64 *c = v; |
570 | unsigned long mask; | |
38c0b2c2 | 571 | unsigned long proc_freq; |
ae0af3e3 | 572 | int i, size; |
1da177e4 LT |
573 | |
574 | mask = c->features; | |
575 | ||
1da177e4 | 576 | /* build the feature string: */ |
ae0af3e3 | 577 | memcpy(features, "standard", 9); |
1da177e4 | 578 | cp = features; |
ae0af3e3 AG |
579 | size = sizeof(features); |
580 | sep = ""; | |
581 | for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) { | |
1da177e4 | 582 | if (mask & feature_bits[i].mask) { |
ae0af3e3 AG |
583 | cp += snprintf(cp, size, "%s%s", sep, |
584 | feature_bits[i].feature_name), | |
585 | sep = ", "; | |
1da177e4 | 586 | mask &= ~feature_bits[i].mask; |
ae0af3e3 | 587 | size = sizeof(features) - (cp - features); |
1da177e4 LT |
588 | } |
589 | } | |
ae0af3e3 AG |
590 | if (mask && size > 1) { |
591 | /* print unknown features as a hex value */ | |
592 | snprintf(cp, size, "%s0x%lx", sep, mask); | |
1da177e4 LT |
593 | } |
594 | ||
95235ca2 VP |
595 | proc_freq = cpufreq_quick_get(cpunum); |
596 | if (!proc_freq) | |
597 | proc_freq = c->proc_freq / 1000; | |
598 | ||
1da177e4 LT |
599 | seq_printf(m, |
600 | "processor : %d\n" | |
601 | "vendor : %s\n" | |
602 | "arch : IA-64\n" | |
76d08bb3 | 603 | "family : %u\n" |
1da177e4 | 604 | "model : %u\n" |
76d08bb3 | 605 | "model name : %s\n" |
1da177e4 LT |
606 | "revision : %u\n" |
607 | "archrev : %u\n" | |
ae0af3e3 | 608 | "features : %s\n" |
1da177e4 LT |
609 | "cpu number : %lu\n" |
610 | "cpu regs : %u\n" | |
8a3a78d1 | 611 | "cpu MHz : %lu.%03lu\n" |
1da177e4 | 612 | "itc MHz : %lu.%06lu\n" |
e927ecb0 | 613 | "BogoMIPS : %lu.%02lu\n", |
76d08bb3 TL |
614 | cpunum, c->vendor, c->family, c->model, |
615 | c->model_name, c->revision, c->archrev, | |
1da177e4 | 616 | features, c->ppn, c->number, |
95235ca2 | 617 | proc_freq / 1000, proc_freq % 1000, |
1da177e4 LT |
618 | c->itc_freq / 1000000, c->itc_freq % 1000000, |
619 | lpj*HZ/500000, (lpj*HZ/5000) % 100); | |
e927ecb0 | 620 | #ifdef CONFIG_SMP |
ce6e71ad | 621 | seq_printf(m, "siblings : %u\n", cpus_weight(cpu_core_map[cpunum])); |
113134fc AC |
622 | if (c->socket_id != -1) |
623 | seq_printf(m, "physical id: %u\n", c->socket_id); | |
e927ecb0 SS |
624 | if (c->threads_per_core > 1 || c->cores_per_socket > 1) |
625 | seq_printf(m, | |
113134fc AC |
626 | "core id : %u\n" |
627 | "thread id : %u\n", | |
628 | c->core_id, c->thread_id); | |
e927ecb0 SS |
629 | #endif |
630 | seq_printf(m,"\n"); | |
631 | ||
1da177e4 LT |
632 | return 0; |
633 | } | |
634 | ||
635 | static void * | |
636 | c_start (struct seq_file *m, loff_t *pos) | |
637 | { | |
638 | #ifdef CONFIG_SMP | |
639 | while (*pos < NR_CPUS && !cpu_isset(*pos, cpu_online_map)) | |
640 | ++*pos; | |
641 | #endif | |
642 | return *pos < NR_CPUS ? cpu_data(*pos) : NULL; | |
643 | } | |
644 | ||
645 | static void * | |
646 | c_next (struct seq_file *m, void *v, loff_t *pos) | |
647 | { | |
648 | ++*pos; | |
649 | return c_start(m, pos); | |
650 | } | |
651 | ||
652 | static void | |
653 | c_stop (struct seq_file *m, void *v) | |
654 | { | |
655 | } | |
656 | ||
a23fe55e | 657 | const struct seq_operations cpuinfo_op = { |
1da177e4 LT |
658 | .start = c_start, |
659 | .next = c_next, | |
660 | .stop = c_stop, | |
661 | .show = show_cpuinfo | |
662 | }; | |
663 | ||
c5e83e3f JS |
664 | #define MAX_BRANDS 8 |
665 | static char brandname[MAX_BRANDS][128]; | |
76d08bb3 TL |
666 | |
667 | static char * __cpuinit | |
668 | get_model_name(__u8 family, __u8 model) | |
669 | { | |
c5e83e3f | 670 | static int overflow; |
76d08bb3 | 671 | char brand[128]; |
c5e83e3f | 672 | int i; |
76d08bb3 | 673 | |
75f6a1de | 674 | memcpy(brand, "Unknown", 8); |
76d08bb3 TL |
675 | if (ia64_pal_get_brand_info(brand)) { |
676 | if (family == 0x7) | |
677 | memcpy(brand, "Merced", 7); | |
678 | else if (family == 0x1f) switch (model) { | |
679 | case 0: memcpy(brand, "McKinley", 9); break; | |
680 | case 1: memcpy(brand, "Madison", 8); break; | |
681 | case 2: memcpy(brand, "Madison up to 9M cache", 23); break; | |
75f6a1de | 682 | } |
76d08bb3 | 683 | } |
c5e83e3f JS |
684 | for (i = 0; i < MAX_BRANDS; i++) |
685 | if (strcmp(brandname[i], brand) == 0) | |
686 | return brandname[i]; | |
687 | for (i = 0; i < MAX_BRANDS; i++) | |
688 | if (brandname[i][0] == '\0') | |
689 | return strcpy(brandname[i], brand); | |
690 | if (overflow++ == 0) | |
691 | printk(KERN_ERR | |
692 | "%s: Table overflow. Some processor model information will be missing\n", | |
693 | __FUNCTION__); | |
694 | return "Unknown"; | |
76d08bb3 TL |
695 | } |
696 | ||
244fd545 | 697 | static void __cpuinit |
1da177e4 LT |
698 | identify_cpu (struct cpuinfo_ia64 *c) |
699 | { | |
700 | union { | |
701 | unsigned long bits[5]; | |
702 | struct { | |
703 | /* id 0 & 1: */ | |
704 | char vendor[16]; | |
705 | ||
706 | /* id 2 */ | |
707 | u64 ppn; /* processor serial number */ | |
708 | ||
709 | /* id 3: */ | |
710 | unsigned number : 8; | |
711 | unsigned revision : 8; | |
712 | unsigned model : 8; | |
713 | unsigned family : 8; | |
714 | unsigned archrev : 8; | |
715 | unsigned reserved : 24; | |
716 | ||
717 | /* id 4: */ | |
718 | u64 features; | |
719 | } field; | |
720 | } cpuid; | |
721 | pal_vm_info_1_u_t vm1; | |
722 | pal_vm_info_2_u_t vm2; | |
723 | pal_status_t status; | |
724 | unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */ | |
725 | int i; | |
1da177e4 LT |
726 | for (i = 0; i < 5; ++i) |
727 | cpuid.bits[i] = ia64_get_cpuid(i); | |
728 | ||
729 | memcpy(c->vendor, cpuid.field.vendor, 16); | |
730 | #ifdef CONFIG_SMP | |
731 | c->cpu = smp_processor_id(); | |
e927ecb0 SS |
732 | |
733 | /* below default values will be overwritten by identify_siblings() | |
72fdbdce | 734 | * for Multi-Threading/Multi-Core capable CPUs |
e927ecb0 SS |
735 | */ |
736 | c->threads_per_core = c->cores_per_socket = c->num_log = 1; | |
737 | c->socket_id = -1; | |
738 | ||
739 | identify_siblings(c); | |
113134fc AC |
740 | |
741 | if (c->threads_per_core > smp_num_siblings) | |
742 | smp_num_siblings = c->threads_per_core; | |
1da177e4 LT |
743 | #endif |
744 | c->ppn = cpuid.field.ppn; | |
745 | c->number = cpuid.field.number; | |
746 | c->revision = cpuid.field.revision; | |
747 | c->model = cpuid.field.model; | |
748 | c->family = cpuid.field.family; | |
749 | c->archrev = cpuid.field.archrev; | |
750 | c->features = cpuid.field.features; | |
76d08bb3 | 751 | c->model_name = get_model_name(c->family, c->model); |
1da177e4 LT |
752 | |
753 | status = ia64_pal_vm_summary(&vm1, &vm2); | |
754 | if (status == PAL_STATUS_SUCCESS) { | |
755 | impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb; | |
756 | phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size; | |
757 | } | |
758 | c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1)); | |
759 | c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1)); | |
760 | } | |
761 | ||
0f7ac29e | 762 | void __init |
1da177e4 LT |
763 | setup_per_cpu_areas (void) |
764 | { | |
765 | /* start_kernel() requires this... */ | |
a6b14fa6 AR |
766 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
767 | prefill_possible_map(); | |
768 | #endif | |
1da177e4 LT |
769 | } |
770 | ||
08357f82 ZM |
771 | /* |
772 | * Calculate the max. cache line size. | |
773 | * | |
774 | * In addition, the minimum of the i-cache stride sizes is calculated for | |
775 | * "flush_icache_range()". | |
776 | */ | |
244fd545 | 777 | static void __cpuinit |
1da177e4 LT |
778 | get_max_cacheline_size (void) |
779 | { | |
780 | unsigned long line_size, max = 1; | |
781 | u64 l, levels, unique_caches; | |
782 | pal_cache_config_info_t cci; | |
783 | s64 status; | |
784 | ||
785 | status = ia64_pal_cache_summary(&levels, &unique_caches); | |
786 | if (status != 0) { | |
787 | printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n", | |
788 | __FUNCTION__, status); | |
789 | max = SMP_CACHE_BYTES; | |
08357f82 ZM |
790 | /* Safest setup for "flush_icache_range()" */ |
791 | ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT; | |
1da177e4 LT |
792 | goto out; |
793 | } | |
794 | ||
795 | for (l = 0; l < levels; ++l) { | |
796 | status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2, | |
797 | &cci); | |
798 | if (status != 0) { | |
799 | printk(KERN_ERR | |
08357f82 | 800 | "%s: ia64_pal_cache_config_info(l=%lu, 2) failed (status=%ld)\n", |
1da177e4 LT |
801 | __FUNCTION__, l, status); |
802 | max = SMP_CACHE_BYTES; | |
08357f82 ZM |
803 | /* The safest setup for "flush_icache_range()" */ |
804 | cci.pcci_stride = I_CACHE_STRIDE_SHIFT; | |
805 | cci.pcci_unified = 1; | |
1da177e4 LT |
806 | } |
807 | line_size = 1 << cci.pcci_line_size; | |
808 | if (line_size > max) | |
809 | max = line_size; | |
08357f82 ZM |
810 | if (!cci.pcci_unified) { |
811 | status = ia64_pal_cache_config_info(l, | |
812 | /* cache_type (instruction)= */ 1, | |
813 | &cci); | |
814 | if (status != 0) { | |
815 | printk(KERN_ERR | |
816 | "%s: ia64_pal_cache_config_info(l=%lu, 1) failed (status=%ld)\n", | |
817 | __FUNCTION__, l, status); | |
818 | /* The safest setup for "flush_icache_range()" */ | |
819 | cci.pcci_stride = I_CACHE_STRIDE_SHIFT; | |
820 | } | |
821 | } | |
822 | if (cci.pcci_stride < ia64_i_cache_stride_shift) | |
823 | ia64_i_cache_stride_shift = cci.pcci_stride; | |
824 | } | |
1da177e4 LT |
825 | out: |
826 | if (max > ia64_max_cacheline_size) | |
827 | ia64_max_cacheline_size = max; | |
828 | } | |
829 | ||
830 | /* | |
831 | * cpu_init() initializes state that is per-CPU. This function acts | |
832 | * as a 'CPU state barrier', nothing should get across. | |
833 | */ | |
244fd545 | 834 | void __cpuinit |
1da177e4 LT |
835 | cpu_init (void) |
836 | { | |
244fd545 | 837 | extern void __cpuinit ia64_mmu_init (void *); |
a0776ec8 | 838 | static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG; |
1da177e4 LT |
839 | unsigned long num_phys_stacked; |
840 | pal_vm_info_2_u_t vmi; | |
841 | unsigned int max_ctx; | |
842 | struct cpuinfo_ia64 *cpu_info; | |
843 | void *cpu_data; | |
844 | ||
845 | cpu_data = per_cpu_init(); | |
4d1efed5 | 846 | #ifdef CONFIG_SMP |
d5a7430d MT |
847 | /* |
848 | * insert boot cpu into sibling and core mapes | |
849 | * (must be done after per_cpu area is setup) | |
850 | */ | |
851 | if (smp_processor_id() == 0) { | |
852 | cpu_set(0, per_cpu(cpu_sibling_map, 0)); | |
853 | cpu_set(0, cpu_core_map[0]); | |
854 | } | |
4d1efed5 | 855 | #endif |
1da177e4 LT |
856 | |
857 | /* | |
858 | * We set ar.k3 so that assembly code in MCA handler can compute | |
859 | * physical addresses of per cpu variables with a simple: | |
860 | * phys = ar.k3 + &per_cpu_var | |
861 | */ | |
862 | ia64_set_kr(IA64_KR_PER_CPU_DATA, | |
863 | ia64_tpa(cpu_data) - (long) __per_cpu_start); | |
864 | ||
865 | get_max_cacheline_size(); | |
866 | ||
867 | /* | |
868 | * We can't pass "local_cpu_data" to identify_cpu() because we haven't called | |
869 | * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it | |
870 | * depends on the data returned by identify_cpu(). We break the dependency by | |
871 | * accessing cpu_data() through the canonical per-CPU address. | |
872 | */ | |
873 | cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start); | |
874 | identify_cpu(cpu_info); | |
875 | ||
876 | #ifdef CONFIG_MCKINLEY | |
877 | { | |
878 | # define FEATURE_SET 16 | |
879 | struct ia64_pal_retval iprv; | |
880 | ||
881 | if (cpu_info->family == 0x1f) { | |
882 | PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0); | |
883 | if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80)) | |
884 | PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES, | |
885 | (iprv.v1 | 0x80), FEATURE_SET, 0); | |
886 | } | |
887 | } | |
888 | #endif | |
889 | ||
890 | /* Clear the stack memory reserved for pt_regs: */ | |
6450578f | 891 | memset(task_pt_regs(current), 0, sizeof(struct pt_regs)); |
1da177e4 LT |
892 | |
893 | ia64_set_kr(IA64_KR_FPU_OWNER, 0); | |
894 | ||
895 | /* | |
896 | * Initialize the page-table base register to a global | |
897 | * directory with all zeroes. This ensure that we can handle | |
898 | * TLB-misses to user address-space even before we created the | |
899 | * first user address-space. This may happen, e.g., due to | |
900 | * aggressive use of lfetch.fault. | |
901 | */ | |
902 | ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page))); | |
903 | ||
904 | /* | |
86ebacd3 TL |
905 | * Initialize default control register to defer speculative faults except |
906 | * for those arising from TLB misses, which are not deferred. The | |
1da177e4 LT |
907 | * kernel MUST NOT depend on a particular setting of these bits (in other words, |
908 | * the kernel must have recovery code for all speculative accesses). Turn on | |
909 | * dcr.lc as per recommendation by the architecture team. Most IA-32 apps | |
910 | * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll | |
911 | * be fine). | |
912 | */ | |
913 | ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR | |
914 | | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC)); | |
915 | atomic_inc(&init_mm.mm_count); | |
916 | current->active_mm = &init_mm; | |
917 | if (current->mm) | |
918 | BUG(); | |
919 | ||
920 | ia64_mmu_init(ia64_imva(cpu_data)); | |
921 | ia64_mca_cpu_init(ia64_imva(cpu_data)); | |
922 | ||
923 | #ifdef CONFIG_IA32_SUPPORT | |
924 | ia32_cpu_init(); | |
925 | #endif | |
926 | ||
72fdbdce | 927 | /* Clear ITC to eliminate sched_clock() overflows in human time. */ |
1da177e4 LT |
928 | ia64_set_itc(0); |
929 | ||
930 | /* disable all local interrupt sources: */ | |
931 | ia64_set_itv(1 << 16); | |
932 | ia64_set_lrr0(1 << 16); | |
933 | ia64_set_lrr1(1 << 16); | |
934 | ia64_setreg(_IA64_REG_CR_PMV, 1 << 16); | |
935 | ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16); | |
936 | ||
937 | /* clear TPR & XTP to enable all interrupt classes: */ | |
938 | ia64_setreg(_IA64_REG_CR_TPR, 0); | |
f740e6c9 KK |
939 | |
940 | /* Clear any pending interrupts left by SAL/EFI */ | |
941 | while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) | |
942 | ia64_eoi(); | |
943 | ||
1da177e4 LT |
944 | #ifdef CONFIG_SMP |
945 | normal_xtp(); | |
946 | #endif | |
947 | ||
948 | /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */ | |
949 | if (ia64_pal_vm_summary(NULL, &vmi) == 0) | |
950 | max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1; | |
951 | else { | |
952 | printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n"); | |
953 | max_ctx = (1U << 15) - 1; /* use architected minimum */ | |
954 | } | |
955 | while (max_ctx < ia64_ctx.max_ctx) { | |
956 | unsigned int old = ia64_ctx.max_ctx; | |
957 | if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old) | |
958 | break; | |
959 | } | |
960 | ||
961 | if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) { | |
962 | printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical " | |
963 | "stacked regs\n"); | |
964 | num_phys_stacked = 96; | |
965 | } | |
966 | /* size of physical stacked register partition plus 8 bytes: */ | |
a0776ec8 KC |
967 | if (num_phys_stacked > max_num_phys_stacked) { |
968 | ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8); | |
969 | max_num_phys_stacked = num_phys_stacked; | |
970 | } | |
1da177e4 | 971 | platform_cpu_init(); |
6c4fa560 | 972 | pm_idle = default_idle; |
1da177e4 LT |
973 | } |
974 | ||
244fd545 | 975 | void __init |
1da177e4 LT |
976 | check_bugs (void) |
977 | { | |
978 | ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles, | |
979 | (unsigned long) __end___mckinley_e9_bundles); | |
980 | } | |
3ed3bce8 MD |
981 | |
982 | static int __init run_dmi_scan(void) | |
983 | { | |
984 | dmi_scan_machine(); | |
985 | return 0; | |
986 | } | |
987 | core_initcall(run_dmi_scan); |