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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Extensible Firmware Interface | |
3 | * | |
7d9aed26 AG |
4 | * Based on Extensible Firmware Interface Specification version 0.9 |
5 | * April 30, 1999 | |
1da177e4 LT |
6 | * |
7 | * Copyright (C) 1999 VA Linux Systems | |
8 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
9 | * Copyright (C) 1999-2003 Hewlett-Packard Co. | |
10 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
11 | * Stephane Eranian <eranian@hpl.hp.com> | |
32e62c63 BH |
12 | * (c) Copyright 2006 Hewlett-Packard Development Company, L.P. |
13 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
14 | * |
15 | * All EFI Runtime Services are not implemented yet as EFI only | |
16 | * supports physical mode addressing on SoftSDV. This is to be fixed | |
17 | * in a future version. --drummond 1999-07-20 | |
18 | * | |
19 | * Implemented EFI runtime services and virtual mode calls. --davidm | |
20 | * | |
21 | * Goutham Rao: <goutham.rao@intel.com> | |
22 | * Skip non-WB memory and ignore empty memory ranges. | |
23 | */ | |
1da177e4 | 24 | #include <linux/module.h> |
f4a57099 | 25 | #include <linux/bootmem.h> |
93a72052 | 26 | #include <linux/crash_dump.h> |
1da177e4 LT |
27 | #include <linux/kernel.h> |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
1da177e4 LT |
31 | #include <linux/time.h> |
32 | #include <linux/efi.h> | |
a7956113 | 33 | #include <linux/kexec.h> |
ed7ed365 | 34 | #include <linux/mm.h> |
1da177e4 LT |
35 | |
36 | #include <asm/io.h> | |
37 | #include <asm/kregs.h> | |
38 | #include <asm/meminit.h> | |
39 | #include <asm/pgtable.h> | |
40 | #include <asm/processor.h> | |
41 | #include <asm/mca.h> | |
2046b94e | 42 | #include <asm/tlbflush.h> |
1da177e4 LT |
43 | |
44 | #define EFI_DEBUG 0 | |
45 | ||
46 | extern efi_status_t efi_call_phys (void *, ...); | |
47 | ||
48 | struct efi efi; | |
49 | EXPORT_SYMBOL(efi); | |
50 | static efi_runtime_services_t *runtime; | |
e088a4ad | 51 | static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL; |
1da177e4 LT |
52 | |
53 | #define efi_call_virt(f, args...) (*(f))(args) | |
54 | ||
7d9aed26 AG |
55 | #define STUB_GET_TIME(prefix, adjust_arg) \ |
56 | static efi_status_t \ | |
57 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ | |
58 | { \ | |
59 | struct ia64_fpreg fr[6]; \ | |
60 | efi_time_cap_t *atc = NULL; \ | |
61 | efi_status_t ret; \ | |
62 | \ | |
63 | if (tc) \ | |
64 | atc = adjust_arg(tc); \ | |
65 | ia64_save_scratch_fpregs(fr); \ | |
66 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \ | |
67 | adjust_arg(tm), atc); \ | |
68 | ia64_load_scratch_fpregs(fr); \ | |
69 | return ret; \ | |
1da177e4 LT |
70 | } |
71 | ||
7d9aed26 AG |
72 | #define STUB_SET_TIME(prefix, adjust_arg) \ |
73 | static efi_status_t \ | |
74 | prefix##_set_time (efi_time_t *tm) \ | |
75 | { \ | |
76 | struct ia64_fpreg fr[6]; \ | |
77 | efi_status_t ret; \ | |
78 | \ | |
79 | ia64_save_scratch_fpregs(fr); \ | |
80 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \ | |
81 | adjust_arg(tm)); \ | |
82 | ia64_load_scratch_fpregs(fr); \ | |
83 | return ret; \ | |
1da177e4 LT |
84 | } |
85 | ||
7d9aed26 AG |
86 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ |
87 | static efi_status_t \ | |
88 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \ | |
89 | efi_time_t *tm) \ | |
90 | { \ | |
91 | struct ia64_fpreg fr[6]; \ | |
92 | efi_status_t ret; \ | |
93 | \ | |
94 | ia64_save_scratch_fpregs(fr); \ | |
95 | ret = efi_call_##prefix( \ | |
96 | (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ | |
97 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ | |
98 | ia64_load_scratch_fpregs(fr); \ | |
99 | return ret; \ | |
1da177e4 LT |
100 | } |
101 | ||
7d9aed26 AG |
102 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ |
103 | static efi_status_t \ | |
104 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ | |
105 | { \ | |
106 | struct ia64_fpreg fr[6]; \ | |
107 | efi_time_t *atm = NULL; \ | |
108 | efi_status_t ret; \ | |
109 | \ | |
110 | if (tm) \ | |
111 | atm = adjust_arg(tm); \ | |
112 | ia64_save_scratch_fpregs(fr); \ | |
113 | ret = efi_call_##prefix( \ | |
114 | (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ | |
115 | enabled, atm); \ | |
116 | ia64_load_scratch_fpregs(fr); \ | |
117 | return ret; \ | |
1da177e4 LT |
118 | } |
119 | ||
7d9aed26 AG |
120 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ |
121 | static efi_status_t \ | |
122 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ | |
123 | unsigned long *data_size, void *data) \ | |
124 | { \ | |
125 | struct ia64_fpreg fr[6]; \ | |
126 | u32 *aattr = NULL; \ | |
127 | efi_status_t ret; \ | |
128 | \ | |
129 | if (attr) \ | |
130 | aattr = adjust_arg(attr); \ | |
131 | ia64_save_scratch_fpregs(fr); \ | |
132 | ret = efi_call_##prefix( \ | |
133 | (efi_get_variable_t *) __va(runtime->get_variable), \ | |
134 | adjust_arg(name), adjust_arg(vendor), aattr, \ | |
135 | adjust_arg(data_size), adjust_arg(data)); \ | |
136 | ia64_load_scratch_fpregs(fr); \ | |
137 | return ret; \ | |
1da177e4 LT |
138 | } |
139 | ||
7d9aed26 AG |
140 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ |
141 | static efi_status_t \ | |
142 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \ | |
143 | efi_guid_t *vendor) \ | |
144 | { \ | |
145 | struct ia64_fpreg fr[6]; \ | |
146 | efi_status_t ret; \ | |
147 | \ | |
148 | ia64_save_scratch_fpregs(fr); \ | |
149 | ret = efi_call_##prefix( \ | |
150 | (efi_get_next_variable_t *) __va(runtime->get_next_variable), \ | |
151 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ | |
152 | ia64_load_scratch_fpregs(fr); \ | |
153 | return ret; \ | |
1da177e4 LT |
154 | } |
155 | ||
7d9aed26 AG |
156 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ |
157 | static efi_status_t \ | |
158 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \ | |
1eb9a4b8 | 159 | u32 attr, unsigned long data_size, \ |
7d9aed26 AG |
160 | void *data) \ |
161 | { \ | |
162 | struct ia64_fpreg fr[6]; \ | |
163 | efi_status_t ret; \ | |
164 | \ | |
165 | ia64_save_scratch_fpregs(fr); \ | |
166 | ret = efi_call_##prefix( \ | |
167 | (efi_set_variable_t *) __va(runtime->set_variable), \ | |
168 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ | |
169 | adjust_arg(data)); \ | |
170 | ia64_load_scratch_fpregs(fr); \ | |
171 | return ret; \ | |
1da177e4 LT |
172 | } |
173 | ||
7d9aed26 AG |
174 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ |
175 | static efi_status_t \ | |
176 | prefix##_get_next_high_mono_count (u32 *count) \ | |
177 | { \ | |
178 | struct ia64_fpreg fr[6]; \ | |
179 | efi_status_t ret; \ | |
180 | \ | |
181 | ia64_save_scratch_fpregs(fr); \ | |
182 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ | |
183 | __va(runtime->get_next_high_mono_count), \ | |
184 | adjust_arg(count)); \ | |
185 | ia64_load_scratch_fpregs(fr); \ | |
186 | return ret; \ | |
1da177e4 LT |
187 | } |
188 | ||
7d9aed26 AG |
189 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ |
190 | static void \ | |
191 | prefix##_reset_system (int reset_type, efi_status_t status, \ | |
192 | unsigned long data_size, efi_char16_t *data) \ | |
193 | { \ | |
194 | struct ia64_fpreg fr[6]; \ | |
195 | efi_char16_t *adata = NULL; \ | |
196 | \ | |
197 | if (data) \ | |
198 | adata = adjust_arg(data); \ | |
199 | \ | |
200 | ia64_save_scratch_fpregs(fr); \ | |
201 | efi_call_##prefix( \ | |
202 | (efi_reset_system_t *) __va(runtime->reset_system), \ | |
203 | reset_type, status, data_size, adata); \ | |
204 | /* should not return, but just in case... */ \ | |
205 | ia64_load_scratch_fpregs(fr); \ | |
1da177e4 LT |
206 | } |
207 | ||
208 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) | |
209 | ||
210 | STUB_GET_TIME(phys, phys_ptr) | |
211 | STUB_SET_TIME(phys, phys_ptr) | |
212 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) | |
213 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) | |
214 | STUB_GET_VARIABLE(phys, phys_ptr) | |
215 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) | |
216 | STUB_SET_VARIABLE(phys, phys_ptr) | |
217 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) | |
218 | STUB_RESET_SYSTEM(phys, phys_ptr) | |
219 | ||
220 | #define id(arg) arg | |
221 | ||
222 | STUB_GET_TIME(virt, id) | |
223 | STUB_SET_TIME(virt, id) | |
224 | STUB_GET_WAKEUP_TIME(virt, id) | |
225 | STUB_SET_WAKEUP_TIME(virt, id) | |
226 | STUB_GET_VARIABLE(virt, id) | |
227 | STUB_GET_NEXT_VARIABLE(virt, id) | |
228 | STUB_SET_VARIABLE(virt, id) | |
229 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) | |
230 | STUB_RESET_SYSTEM(virt, id) | |
231 | ||
232 | void | |
233 | efi_gettimeofday (struct timespec *ts) | |
234 | { | |
235 | efi_time_t tm; | |
236 | ||
4b07ae9b LZ |
237 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) { |
238 | memset(ts, 0, sizeof(*ts)); | |
1da177e4 | 239 | return; |
4b07ae9b | 240 | } |
1da177e4 | 241 | |
7d9aed26 AG |
242 | ts->tv_sec = mktime(tm.year, tm.month, tm.day, |
243 | tm.hour, tm.minute, tm.second); | |
1da177e4 LT |
244 | ts->tv_nsec = tm.nanosecond; |
245 | } | |
246 | ||
247 | static int | |
66888a6e | 248 | is_memory_available (efi_memory_desc_t *md) |
1da177e4 LT |
249 | { |
250 | if (!(md->attribute & EFI_MEMORY_WB)) | |
251 | return 0; | |
252 | ||
253 | switch (md->type) { | |
254 | case EFI_LOADER_CODE: | |
255 | case EFI_LOADER_DATA: | |
256 | case EFI_BOOT_SERVICES_CODE: | |
257 | case EFI_BOOT_SERVICES_DATA: | |
258 | case EFI_CONVENTIONAL_MEMORY: | |
259 | return 1; | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
d8c97d5f TL |
264 | typedef struct kern_memdesc { |
265 | u64 attribute; | |
266 | u64 start; | |
267 | u64 num_pages; | |
268 | } kern_memdesc_t; | |
1da177e4 | 269 | |
d8c97d5f | 270 | static kern_memdesc_t *kern_memmap; |
1da177e4 | 271 | |
80851ef2 BH |
272 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
273 | ||
274 | static inline u64 | |
275 | kmd_end(kern_memdesc_t *kmd) | |
276 | { | |
277 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); | |
278 | } | |
279 | ||
280 | static inline u64 | |
281 | efi_md_end(efi_memory_desc_t *md) | |
282 | { | |
283 | return (md->phys_addr + efi_md_size(md)); | |
284 | } | |
285 | ||
286 | static inline int | |
287 | efi_wb(efi_memory_desc_t *md) | |
288 | { | |
289 | return (md->attribute & EFI_MEMORY_WB); | |
290 | } | |
291 | ||
292 | static inline int | |
293 | efi_uc(efi_memory_desc_t *md) | |
294 | { | |
295 | return (md->attribute & EFI_MEMORY_UC); | |
296 | } | |
297 | ||
1da177e4 | 298 | static void |
d8c97d5f | 299 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
1da177e4 | 300 | { |
d8c97d5f TL |
301 | kern_memdesc_t *k; |
302 | u64 start, end, voff; | |
1da177e4 | 303 | |
d8c97d5f TL |
304 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
305 | for (k = kern_memmap; k->start != ~0UL; k++) { | |
306 | if (k->attribute != attr) | |
307 | continue; | |
308 | start = PAGE_ALIGN(k->start); | |
309 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; | |
310 | if (start < end) | |
311 | if ((*callback)(start + voff, end + voff, arg) < 0) | |
312 | return; | |
313 | } | |
1da177e4 LT |
314 | } |
315 | ||
316 | /* | |
965e7c8a | 317 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 318 | * descriptor that has memory that is available for OS use. |
1da177e4 LT |
319 | */ |
320 | void | |
321 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) | |
322 | { | |
d8c97d5f | 323 | walk(callback, arg, EFI_MEMORY_WB); |
1da177e4 LT |
324 | } |
325 | ||
f14f75b8 | 326 | /* |
965e7c8a | 327 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 328 | * descriptor that has memory that is available for uncached allocator. |
f14f75b8 | 329 | */ |
d8c97d5f TL |
330 | void |
331 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) | |
f14f75b8 | 332 | { |
d8c97d5f | 333 | walk(callback, arg, EFI_MEMORY_UC); |
f14f75b8 JS |
334 | } |
335 | ||
1da177e4 | 336 | /* |
965e7c8a | 337 | * Look for the PAL_CODE region reported by EFI and map it using an |
1da177e4 LT |
338 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor |
339 | * Abstraction Layer chapter 11 in ADAG | |
340 | */ | |
1da177e4 LT |
341 | void * |
342 | efi_get_pal_addr (void) | |
343 | { | |
344 | void *efi_map_start, *efi_map_end, *p; | |
345 | efi_memory_desc_t *md; | |
346 | u64 efi_desc_size; | |
347 | int pal_code_count = 0; | |
348 | u64 vaddr, mask; | |
349 | ||
350 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
351 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
352 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
353 | ||
354 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
355 | md = p; | |
356 | if (md->type != EFI_PAL_CODE) | |
357 | continue; | |
358 | ||
359 | if (++pal_code_count > 1) { | |
7d9aed26 | 360 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, " |
e088a4ad | 361 | "dropped @ %llx\n", md->phys_addr); |
1da177e4 LT |
362 | continue; |
363 | } | |
364 | /* | |
7d9aed26 AG |
365 | * The only ITLB entry in region 7 that is used is the one |
366 | * installed by __start(). That entry covers a 64MB range. | |
1da177e4 LT |
367 | */ |
368 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); | |
369 | vaddr = PAGE_OFFSET + md->phys_addr; | |
370 | ||
371 | /* | |
7d9aed26 AG |
372 | * We must check that the PAL mapping won't overlap with the |
373 | * kernel mapping. | |
1da177e4 | 374 | * |
7d9aed26 AG |
375 | * PAL code is guaranteed to be aligned on a power of 2 between |
376 | * 4k and 256KB and that only one ITR is needed to map it. This | |
377 | * implies that the PAL code is always aligned on its size, | |
378 | * i.e., the closest matching page size supported by the TLB. | |
379 | * Therefore PAL code is guaranteed never to cross a 64MB unless | |
380 | * it is bigger than 64MB (very unlikely!). So for now the | |
381 | * following test is enough to determine whether or not we need | |
382 | * a dedicated ITR for the PAL code. | |
1da177e4 LT |
383 | */ |
384 | if ((vaddr & mask) == (KERNEL_START & mask)) { | |
d4ed8084 HH |
385 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", |
386 | __func__); | |
1da177e4 LT |
387 | continue; |
388 | } | |
389 | ||
685c7f5d | 390 | if (efi_md_size(md) > IA64_GRANULE_SIZE) |
965e7c8a | 391 | panic("Whoa! PAL code size bigger than a granule!"); |
1da177e4 LT |
392 | |
393 | #if EFI_DEBUG | |
394 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); | |
395 | ||
7d9aed26 AG |
396 | printk(KERN_INFO "CPU %d: mapping PAL code " |
397 | "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n", | |
398 | smp_processor_id(), md->phys_addr, | |
399 | md->phys_addr + efi_md_size(md), | |
400 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); | |
1da177e4 LT |
401 | #endif |
402 | return __va(md->phys_addr); | |
403 | } | |
9473252f | 404 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n", |
d4ed8084 | 405 | __func__); |
1da177e4 LT |
406 | return NULL; |
407 | } | |
408 | ||
2046b94e FY |
409 | |
410 | static u8 __init palo_checksum(u8 *buffer, u32 length) | |
411 | { | |
412 | u8 sum = 0; | |
413 | u8 *end = buffer + length; | |
414 | ||
415 | while (buffer < end) | |
416 | sum = (u8) (sum + *(buffer++)); | |
417 | ||
418 | return sum; | |
419 | } | |
420 | ||
421 | /* | |
422 | * Parse and handle PALO table which is published at: | |
423 | * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf | |
424 | */ | |
425 | static void __init handle_palo(unsigned long palo_phys) | |
426 | { | |
427 | struct palo_table *palo = __va(palo_phys); | |
428 | u8 checksum; | |
429 | ||
430 | if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) { | |
431 | printk(KERN_INFO "PALO signature incorrect.\n"); | |
432 | return; | |
433 | } | |
434 | ||
435 | checksum = palo_checksum((u8 *)palo, palo->length); | |
436 | if (checksum) { | |
437 | printk(KERN_INFO "PALO checksum incorrect.\n"); | |
438 | return; | |
439 | } | |
440 | ||
a6c75b86 | 441 | setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO); |
2046b94e FY |
442 | } |
443 | ||
1da177e4 LT |
444 | void |
445 | efi_map_pal_code (void) | |
446 | { | |
447 | void *pal_vaddr = efi_get_pal_addr (); | |
448 | u64 psr; | |
449 | ||
450 | if (!pal_vaddr) | |
451 | return; | |
452 | ||
453 | /* | |
454 | * Cannot write to CRx with PSR.ic=1 | |
455 | */ | |
456 | psr = ia64_clear_ic(); | |
7d9aed26 AG |
457 | ia64_itr(0x1, IA64_TR_PALCODE, |
458 | GRANULEROUNDDOWN((unsigned long) pal_vaddr), | |
1da177e4 LT |
459 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), |
460 | IA64_GRANULE_SHIFT); | |
dae17da6 | 461 | paravirt_dv_serialize_data(); |
1da177e4 | 462 | ia64_set_psr(psr); /* restore psr */ |
1da177e4 LT |
463 | } |
464 | ||
465 | void __init | |
466 | efi_init (void) | |
467 | { | |
468 | void *efi_map_start, *efi_map_end; | |
469 | efi_config_table_t *config_tables; | |
470 | efi_char16_t *c16; | |
471 | u64 efi_desc_size; | |
9d78f43d | 472 | char *cp, vendor[100] = "unknown"; |
1da177e4 | 473 | int i; |
2046b94e | 474 | unsigned long palo_phys; |
1da177e4 | 475 | |
7d9aed26 | 476 | /* |
965e7c8a | 477 | * It's too early to be able to use the standard kernel command line |
7d9aed26 AG |
478 | * support... |
479 | */ | |
a8d91b84 | 480 | for (cp = boot_command_line; *cp; ) { |
1da177e4 | 481 | if (memcmp(cp, "mem=", 4) == 0) { |
9d78f43d | 482 | mem_limit = memparse(cp + 4, &cp); |
1da177e4 | 483 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
9d78f43d | 484 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
a7956113 ZN |
485 | } else if (memcmp(cp, "min_addr=", 9) == 0) { |
486 | min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); | |
1da177e4 LT |
487 | } else { |
488 | while (*cp != ' ' && *cp) | |
489 | ++cp; | |
490 | while (*cp == ' ') | |
491 | ++cp; | |
492 | } | |
493 | } | |
a7956113 | 494 | if (min_addr != 0UL) |
e088a4ad | 495 | printk(KERN_INFO "Ignoring memory below %lluMB\n", |
7d9aed26 | 496 | min_addr >> 20); |
1da177e4 | 497 | if (max_addr != ~0UL) |
e088a4ad | 498 | printk(KERN_INFO "Ignoring memory above %lluMB\n", |
7d9aed26 | 499 | max_addr >> 20); |
1da177e4 LT |
500 | |
501 | efi.systab = __va(ia64_boot_param->efi_systab); | |
502 | ||
503 | /* | |
504 | * Verify the EFI Table | |
505 | */ | |
506 | if (efi.systab == NULL) | |
965e7c8a | 507 | panic("Whoa! Can't find EFI system table.\n"); |
1da177e4 | 508 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
965e7c8a | 509 | panic("Whoa! EFI system table signature incorrect\n"); |
873ec746 BH |
510 | if ((efi.systab->hdr.revision >> 16) == 0) |
511 | printk(KERN_WARNING "Warning: EFI system table version " | |
512 | "%d.%02d, expected 1.00 or greater\n", | |
513 | efi.systab->hdr.revision >> 16, | |
514 | efi.systab->hdr.revision & 0xffff); | |
1da177e4 LT |
515 | |
516 | config_tables = __va(efi.systab->tables); | |
517 | ||
518 | /* Show what we know for posterity */ | |
519 | c16 = __va(efi.systab->fw_vendor); | |
520 | if (c16) { | |
ecdd5dab | 521 | for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i) |
1da177e4 LT |
522 | vendor[i] = *c16++; |
523 | vendor[i] = '\0'; | |
524 | } | |
525 | ||
526 | printk(KERN_INFO "EFI v%u.%.02u by %s:", | |
7d9aed26 AG |
527 | efi.systab->hdr.revision >> 16, |
528 | efi.systab->hdr.revision & 0xffff, vendor); | |
1da177e4 | 529 | |
b2c99e3c BH |
530 | efi.mps = EFI_INVALID_TABLE_ADDR; |
531 | efi.acpi = EFI_INVALID_TABLE_ADDR; | |
532 | efi.acpi20 = EFI_INVALID_TABLE_ADDR; | |
533 | efi.smbios = EFI_INVALID_TABLE_ADDR; | |
534 | efi.sal_systab = EFI_INVALID_TABLE_ADDR; | |
535 | efi.boot_info = EFI_INVALID_TABLE_ADDR; | |
536 | efi.hcdp = EFI_INVALID_TABLE_ADDR; | |
537 | efi.uga = EFI_INVALID_TABLE_ADDR; | |
538 | ||
2046b94e FY |
539 | palo_phys = EFI_INVALID_TABLE_ADDR; |
540 | ||
1da177e4 LT |
541 | for (i = 0; i < (int) efi.systab->nr_tables; i++) { |
542 | if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) { | |
b2c99e3c | 543 | efi.mps = config_tables[i].table; |
1da177e4 LT |
544 | printk(" MPS=0x%lx", config_tables[i].table); |
545 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) { | |
b2c99e3c | 546 | efi.acpi20 = config_tables[i].table; |
1da177e4 LT |
547 | printk(" ACPI 2.0=0x%lx", config_tables[i].table); |
548 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) { | |
b2c99e3c | 549 | efi.acpi = config_tables[i].table; |
1da177e4 LT |
550 | printk(" ACPI=0x%lx", config_tables[i].table); |
551 | } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) { | |
b2c99e3c | 552 | efi.smbios = config_tables[i].table; |
1da177e4 LT |
553 | printk(" SMBIOS=0x%lx", config_tables[i].table); |
554 | } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) { | |
b2c99e3c | 555 | efi.sal_systab = config_tables[i].table; |
1da177e4 LT |
556 | printk(" SALsystab=0x%lx", config_tables[i].table); |
557 | } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) { | |
b2c99e3c | 558 | efi.hcdp = config_tables[i].table; |
1da177e4 | 559 | printk(" HCDP=0x%lx", config_tables[i].table); |
2046b94e FY |
560 | } else if (efi_guidcmp(config_tables[i].guid, |
561 | PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID) == 0) { | |
562 | palo_phys = config_tables[i].table; | |
563 | printk(" PALO=0x%lx", config_tables[i].table); | |
1da177e4 LT |
564 | } |
565 | } | |
566 | printk("\n"); | |
567 | ||
2046b94e FY |
568 | if (palo_phys != EFI_INVALID_TABLE_ADDR) |
569 | handle_palo(palo_phys); | |
570 | ||
1da177e4 LT |
571 | runtime = __va(efi.systab->runtime); |
572 | efi.get_time = phys_get_time; | |
573 | efi.set_time = phys_set_time; | |
574 | efi.get_wakeup_time = phys_get_wakeup_time; | |
575 | efi.set_wakeup_time = phys_set_wakeup_time; | |
576 | efi.get_variable = phys_get_variable; | |
577 | efi.get_next_variable = phys_get_next_variable; | |
578 | efi.set_variable = phys_set_variable; | |
579 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; | |
580 | efi.reset_system = phys_reset_system; | |
581 | ||
582 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
583 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
584 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
585 | ||
586 | #if EFI_DEBUG | |
587 | /* print EFI memory map: */ | |
588 | { | |
589 | efi_memory_desc_t *md; | |
590 | void *p; | |
591 | ||
7d9aed26 AG |
592 | for (i = 0, p = efi_map_start; p < efi_map_end; |
593 | ++i, p += efi_desc_size) | |
594 | { | |
818c7e86 SH |
595 | const char *unit; |
596 | unsigned long size; | |
597 | ||
1da177e4 | 598 | md = p; |
818c7e86 SH |
599 | size = md->num_pages << EFI_PAGE_SHIFT; |
600 | ||
601 | if ((size >> 40) > 0) { | |
602 | size >>= 40; | |
603 | unit = "TB"; | |
604 | } else if ((size >> 30) > 0) { | |
605 | size >>= 30; | |
606 | unit = "GB"; | |
607 | } else if ((size >> 20) > 0) { | |
608 | size >>= 20; | |
609 | unit = "MB"; | |
610 | } else { | |
611 | size >>= 10; | |
612 | unit = "KB"; | |
613 | } | |
614 | ||
615 | printk("mem%02d: type=%2u, attr=0x%016lx, " | |
616 | "range=[0x%016lx-0x%016lx) (%4lu%s)\n", | |
1da177e4 | 617 | i, md->type, md->attribute, md->phys_addr, |
818c7e86 | 618 | md->phys_addr + efi_md_size(md), size, unit); |
1da177e4 LT |
619 | } |
620 | } | |
621 | #endif | |
622 | ||
623 | efi_map_pal_code(); | |
624 | efi_enter_virtual_mode(); | |
625 | } | |
626 | ||
627 | void | |
628 | efi_enter_virtual_mode (void) | |
629 | { | |
630 | void *efi_map_start, *efi_map_end, *p; | |
631 | efi_memory_desc_t *md; | |
632 | efi_status_t status; | |
633 | u64 efi_desc_size; | |
634 | ||
635 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
636 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
637 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
638 | ||
639 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
640 | md = p; | |
641 | if (md->attribute & EFI_MEMORY_RUNTIME) { | |
642 | /* | |
7d9aed26 AG |
643 | * Some descriptors have multiple bits set, so the |
644 | * order of the tests is relevant. | |
1da177e4 LT |
645 | */ |
646 | if (md->attribute & EFI_MEMORY_WB) { | |
647 | md->virt_addr = (u64) __va(md->phys_addr); | |
648 | } else if (md->attribute & EFI_MEMORY_UC) { | |
649 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
650 | } else if (md->attribute & EFI_MEMORY_WC) { | |
651 | #if 0 | |
7d9aed26 AG |
652 | md->virt_addr = ia64_remap(md->phys_addr, |
653 | (_PAGE_A | | |
654 | _PAGE_P | | |
655 | _PAGE_D | | |
656 | _PAGE_MA_WC | | |
657 | _PAGE_PL_0 | | |
658 | _PAGE_AR_RW)); | |
1da177e4 LT |
659 | #else |
660 | printk(KERN_INFO "EFI_MEMORY_WC mapping\n"); | |
661 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
662 | #endif | |
663 | } else if (md->attribute & EFI_MEMORY_WT) { | |
664 | #if 0 | |
7d9aed26 AG |
665 | md->virt_addr = ia64_remap(md->phys_addr, |
666 | (_PAGE_A | | |
667 | _PAGE_P | | |
668 | _PAGE_D | | |
669 | _PAGE_MA_WT | | |
670 | _PAGE_PL_0 | | |
671 | _PAGE_AR_RW)); | |
1da177e4 LT |
672 | #else |
673 | printk(KERN_INFO "EFI_MEMORY_WT mapping\n"); | |
674 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
675 | #endif | |
676 | } | |
677 | } | |
678 | } | |
679 | ||
680 | status = efi_call_phys(__va(runtime->set_virtual_address_map), | |
681 | ia64_boot_param->efi_memmap_size, | |
7d9aed26 AG |
682 | efi_desc_size, |
683 | ia64_boot_param->efi_memdesc_version, | |
1da177e4 LT |
684 | ia64_boot_param->efi_memmap); |
685 | if (status != EFI_SUCCESS) { | |
7d9aed26 AG |
686 | printk(KERN_WARNING "warning: unable to switch EFI into " |
687 | "virtual mode (status=%lu)\n", status); | |
1da177e4 LT |
688 | return; |
689 | } | |
690 | ||
691 | /* | |
7d9aed26 AG |
692 | * Now that EFI is in virtual mode, we call the EFI functions more |
693 | * efficiently: | |
1da177e4 LT |
694 | */ |
695 | efi.get_time = virt_get_time; | |
696 | efi.set_time = virt_set_time; | |
697 | efi.get_wakeup_time = virt_get_wakeup_time; | |
698 | efi.set_wakeup_time = virt_set_wakeup_time; | |
699 | efi.get_variable = virt_get_variable; | |
700 | efi.get_next_variable = virt_get_next_variable; | |
701 | efi.set_variable = virt_set_variable; | |
702 | efi.get_next_high_mono_count = virt_get_next_high_mono_count; | |
703 | efi.reset_system = virt_reset_system; | |
704 | } | |
705 | ||
706 | /* | |
7d9aed26 AG |
707 | * Walk the EFI memory map looking for the I/O port range. There can only be |
708 | * one entry of this type, other I/O port ranges should be described via ACPI. | |
1da177e4 LT |
709 | */ |
710 | u64 | |
711 | efi_get_iobase (void) | |
712 | { | |
713 | void *efi_map_start, *efi_map_end, *p; | |
714 | efi_memory_desc_t *md; | |
715 | u64 efi_desc_size; | |
716 | ||
717 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
718 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
719 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
720 | ||
721 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
722 | md = p; | |
723 | if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) { | |
724 | if (md->attribute & EFI_MEMORY_UC) | |
725 | return md->phys_addr; | |
726 | } | |
727 | } | |
728 | return 0; | |
729 | } | |
730 | ||
32e62c63 BH |
731 | static struct kern_memdesc * |
732 | kern_memory_descriptor (unsigned long phys_addr) | |
1da177e4 | 733 | { |
32e62c63 | 734 | struct kern_memdesc *md; |
1da177e4 | 735 | |
32e62c63 BH |
736 | for (md = kern_memmap; md->start != ~0UL; md++) { |
737 | if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) | |
80851ef2 | 738 | return md; |
1da177e4 | 739 | } |
e037cda5 | 740 | return NULL; |
1da177e4 LT |
741 | } |
742 | ||
32e62c63 BH |
743 | static efi_memory_desc_t * |
744 | efi_memory_descriptor (unsigned long phys_addr) | |
1da177e4 LT |
745 | { |
746 | void *efi_map_start, *efi_map_end, *p; | |
747 | efi_memory_desc_t *md; | |
748 | u64 efi_desc_size; | |
749 | ||
750 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
751 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
752 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
753 | ||
754 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
755 | md = p; | |
756 | ||
685c7f5d | 757 | if (phys_addr - md->phys_addr < efi_md_size(md)) |
32e62c63 | 758 | return md; |
1da177e4 | 759 | } |
e037cda5 | 760 | return NULL; |
1da177e4 | 761 | } |
80851ef2 | 762 | |
6d40fc51 BH |
763 | static int |
764 | efi_memmap_intersects (unsigned long phys_addr, unsigned long size) | |
765 | { | |
766 | void *efi_map_start, *efi_map_end, *p; | |
767 | efi_memory_desc_t *md; | |
768 | u64 efi_desc_size; | |
769 | unsigned long end; | |
770 | ||
771 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
772 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
773 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
774 | ||
775 | end = phys_addr + size; | |
776 | ||
777 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
778 | md = p; | |
6d40fc51 BH |
779 | if (md->phys_addr < end && efi_md_end(md) > phys_addr) |
780 | return 1; | |
781 | } | |
782 | return 0; | |
783 | } | |
784 | ||
80851ef2 BH |
785 | u32 |
786 | efi_mem_type (unsigned long phys_addr) | |
787 | { | |
788 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
789 | ||
790 | if (md) | |
791 | return md->type; | |
792 | return 0; | |
793 | } | |
794 | ||
795 | u64 | |
796 | efi_mem_attributes (unsigned long phys_addr) | |
797 | { | |
798 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
799 | ||
800 | if (md) | |
801 | return md->attribute; | |
802 | return 0; | |
803 | } | |
1da177e4 LT |
804 | EXPORT_SYMBOL(efi_mem_attributes); |
805 | ||
32e62c63 BH |
806 | u64 |
807 | efi_mem_attribute (unsigned long phys_addr, unsigned long size) | |
80851ef2 | 808 | { |
136939a2 | 809 | unsigned long end = phys_addr + size; |
80851ef2 | 810 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
32e62c63 BH |
811 | u64 attr; |
812 | ||
813 | if (!md) | |
814 | return 0; | |
815 | ||
816 | /* | |
817 | * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells | |
818 | * the kernel that firmware needs this region mapped. | |
819 | */ | |
820 | attr = md->attribute & ~EFI_MEMORY_RUNTIME; | |
821 | do { | |
822 | unsigned long md_end = efi_md_end(md); | |
823 | ||
824 | if (end <= md_end) | |
825 | return attr; | |
826 | ||
827 | md = efi_memory_descriptor(md_end); | |
828 | if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) | |
829 | return 0; | |
830 | } while (md); | |
410ab512 | 831 | return 0; /* never reached */ |
32e62c63 BH |
832 | } |
833 | ||
834 | u64 | |
835 | kern_mem_attribute (unsigned long phys_addr, unsigned long size) | |
836 | { | |
837 | unsigned long end = phys_addr + size; | |
838 | struct kern_memdesc *md; | |
839 | u64 attr; | |
80851ef2 | 840 | |
136939a2 | 841 | /* |
32e62c63 BH |
842 | * This is a hack for ioremap calls before we set up kern_memmap. |
843 | * Maybe we should do efi_memmap_init() earlier instead. | |
136939a2 | 844 | */ |
32e62c63 BH |
845 | if (!kern_memmap) { |
846 | attr = efi_mem_attribute(phys_addr, size); | |
847 | if (attr & EFI_MEMORY_WB) | |
848 | return EFI_MEMORY_WB; | |
80851ef2 | 849 | return 0; |
136939a2 | 850 | } |
80851ef2 | 851 | |
32e62c63 BH |
852 | md = kern_memory_descriptor(phys_addr); |
853 | if (!md) | |
854 | return 0; | |
855 | ||
856 | attr = md->attribute; | |
80851ef2 | 857 | do { |
32e62c63 | 858 | unsigned long md_end = kmd_end(md); |
136939a2 BH |
859 | |
860 | if (end <= md_end) | |
32e62c63 | 861 | return attr; |
80851ef2 | 862 | |
32e62c63 BH |
863 | md = kern_memory_descriptor(md_end); |
864 | if (!md || md->attribute != attr) | |
136939a2 | 865 | return 0; |
80851ef2 | 866 | } while (md); |
410ab512 | 867 | return 0; /* never reached */ |
80851ef2 | 868 | } |
32e62c63 | 869 | EXPORT_SYMBOL(kern_mem_attribute); |
80851ef2 | 870 | |
1da177e4 | 871 | int |
136939a2 | 872 | valid_phys_addr_range (unsigned long phys_addr, unsigned long size) |
1da177e4 | 873 | { |
32e62c63 BH |
874 | u64 attr; |
875 | ||
876 | /* | |
877 | * /dev/mem reads and writes use copy_to_user(), which implicitly | |
878 | * uses a granule-sized kernel identity mapping. It's really | |
879 | * only safe to do this for regions in kern_memmap. For more | |
880 | * details, see Documentation/ia64/aliasing.txt. | |
881 | */ | |
882 | attr = kern_mem_attribute(phys_addr, size); | |
883 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) | |
884 | return 1; | |
885 | return 0; | |
80851ef2 | 886 | } |
1da177e4 | 887 | |
80851ef2 | 888 | int |
06c67bef | 889 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
80851ef2 | 890 | { |
6d40fc51 BH |
891 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
892 | u64 attr; | |
893 | ||
894 | attr = efi_mem_attribute(phys_addr, size); | |
895 | ||
32e62c63 | 896 | /* |
6d40fc51 BH |
897 | * /dev/mem mmap uses normal user pages, so we don't need the entire |
898 | * granule, but the entire region we're mapping must support the same | |
899 | * attribute. | |
32e62c63 | 900 | */ |
6d40fc51 BH |
901 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
902 | return 1; | |
903 | ||
904 | /* | |
905 | * Intel firmware doesn't tell us about all the MMIO regions, so | |
906 | * in general we have to allow mmap requests. But if EFI *does* | |
907 | * tell us about anything inside this region, we should deny it. | |
908 | * The user can always map a smaller region to avoid the overlap. | |
909 | */ | |
910 | if (efi_memmap_intersects(phys_addr, size)) | |
911 | return 0; | |
912 | ||
32e62c63 BH |
913 | return 1; |
914 | } | |
1da177e4 | 915 | |
32e62c63 BH |
916 | pgprot_t |
917 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, | |
918 | pgprot_t vma_prot) | |
919 | { | |
920 | unsigned long phys_addr = pfn << PAGE_SHIFT; | |
921 | u64 attr; | |
1da177e4 | 922 | |
32e62c63 BH |
923 | /* |
924 | * For /dev/mem mmap, we use user mappings, but if the region is | |
925 | * in kern_memmap (and hence may be covered by a kernel mapping), | |
926 | * we must use the same attribute as the kernel mapping. | |
927 | */ | |
928 | attr = kern_mem_attribute(phys_addr, size); | |
929 | if (attr & EFI_MEMORY_WB) | |
930 | return pgprot_cacheable(vma_prot); | |
931 | else if (attr & EFI_MEMORY_UC) | |
932 | return pgprot_noncached(vma_prot); | |
933 | ||
934 | /* | |
935 | * Some chipsets don't support UC access to memory. If | |
936 | * WB is supported, we prefer that. | |
937 | */ | |
938 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) | |
939 | return pgprot_cacheable(vma_prot); | |
940 | ||
941 | return pgprot_noncached(vma_prot); | |
1da177e4 LT |
942 | } |
943 | ||
944 | int __init | |
945 | efi_uart_console_only(void) | |
946 | { | |
947 | efi_status_t status; | |
948 | char *s, name[] = "ConOut"; | |
949 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; | |
950 | efi_char16_t *utf16, name_utf16[32]; | |
951 | unsigned char data[1024]; | |
952 | unsigned long size = sizeof(data); | |
953 | struct efi_generic_dev_path *hdr, *end_addr; | |
954 | int uart = 0; | |
955 | ||
956 | /* Convert to UTF-16 */ | |
957 | utf16 = name_utf16; | |
958 | s = name; | |
959 | while (*s) | |
960 | *utf16++ = *s++ & 0x7f; | |
961 | *utf16 = 0; | |
962 | ||
963 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); | |
964 | if (status != EFI_SUCCESS) { | |
965 | printk(KERN_ERR "No EFI %s variable?\n", name); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | hdr = (struct efi_generic_dev_path *) data; | |
970 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); | |
971 | while (hdr < end_addr) { | |
972 | if (hdr->type == EFI_DEV_MSG && | |
973 | hdr->sub_type == EFI_DEV_MSG_UART) | |
974 | uart = 1; | |
975 | else if (hdr->type == EFI_DEV_END_PATH || | |
976 | hdr->type == EFI_DEV_END_PATH2) { | |
977 | if (!uart) | |
978 | return 0; | |
979 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) | |
980 | return 1; | |
981 | uart = 0; | |
982 | } | |
7d9aed26 | 983 | hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length); |
1da177e4 LT |
984 | } |
985 | printk(KERN_ERR "Malformed %s value\n", name); | |
986 | return 0; | |
987 | } | |
d8c97d5f | 988 | |
d8c97d5f TL |
989 | /* |
990 | * Look for the first granule aligned memory descriptor memory | |
991 | * that is big enough to hold EFI memory map. Make sure this | |
992 | * descriptor is atleast granule sized so it does not get trimmed | |
993 | */ | |
994 | struct kern_memdesc * | |
995 | find_memmap_space (void) | |
996 | { | |
997 | u64 contig_low=0, contig_high=0; | |
998 | u64 as = 0, ae; | |
999 | void *efi_map_start, *efi_map_end, *p, *q; | |
1000 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
1001 | u64 space_needed, efi_desc_size; | |
1002 | unsigned long total_mem = 0; | |
1003 | ||
1004 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1005 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1006 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1007 | ||
1008 | /* | |
1009 | * Worst case: we need 3 kernel descriptors for each efi descriptor | |
1010 | * (if every entry has a WB part in the middle, and UC head and tail), | |
1011 | * plus one for the end marker. | |
1012 | */ | |
1013 | space_needed = sizeof(kern_memdesc_t) * | |
1014 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); | |
1015 | ||
1016 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
1017 | md = p; | |
1018 | if (!efi_wb(md)) { | |
1019 | continue; | |
1020 | } | |
7d9aed26 AG |
1021 | if (pmd == NULL || !efi_wb(pmd) || |
1022 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
1023 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1024 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1025 | for (q = p + efi_desc_size; q < efi_map_end; |
1026 | q += efi_desc_size) { | |
d8c97d5f TL |
1027 | check_md = q; |
1028 | if (!efi_wb(check_md)) | |
1029 | break; | |
1030 | if (contig_high != check_md->phys_addr) | |
1031 | break; | |
1032 | contig_high = efi_md_end(check_md); | |
1033 | } | |
1034 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1035 | } | |
66888a6e | 1036 | if (!is_memory_available(md) || md->type == EFI_LOADER_DATA) |
d8c97d5f TL |
1037 | continue; |
1038 | ||
1039 | /* Round ends inward to granule boundaries */ | |
1040 | as = max(contig_low, md->phys_addr); | |
1041 | ae = min(contig_high, efi_md_end(md)); | |
1042 | ||
a7956113 ZN |
1043 | /* keep within max_addr= and min_addr= command line arg */ |
1044 | as = max(as, min_addr); | |
d8c97d5f TL |
1045 | ae = min(ae, max_addr); |
1046 | if (ae <= as) | |
1047 | continue; | |
1048 | ||
1049 | /* avoid going over mem= command line arg */ | |
1050 | if (total_mem + (ae - as) > mem_limit) | |
1051 | ae -= total_mem + (ae - as) - mem_limit; | |
1052 | ||
1053 | if (ae <= as) | |
1054 | continue; | |
1055 | ||
1056 | if (ae - as > space_needed) | |
1057 | break; | |
1058 | } | |
1059 | if (p >= efi_map_end) | |
1060 | panic("Can't allocate space for kernel memory descriptors"); | |
1061 | ||
1062 | return __va(as); | |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Walk the EFI memory map and gather all memory available for kernel | |
1067 | * to use. We can allocate partial granules only if the unavailable | |
1068 | * parts exist, and are WB. | |
1069 | */ | |
cb380853 | 1070 | unsigned long |
e088a4ad | 1071 | efi_memmap_init(u64 *s, u64 *e) |
d8c97d5f | 1072 | { |
e037cda5 | 1073 | struct kern_memdesc *k, *prev = NULL; |
d8c97d5f TL |
1074 | u64 contig_low=0, contig_high=0; |
1075 | u64 as, ae, lim; | |
1076 | void *efi_map_start, *efi_map_end, *p, *q; | |
1077 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
1078 | u64 efi_desc_size; | |
1079 | unsigned long total_mem = 0; | |
1080 | ||
1081 | k = kern_memmap = find_memmap_space(); | |
1082 | ||
1083 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1084 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1085 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1086 | ||
1087 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
1088 | md = p; | |
1089 | if (!efi_wb(md)) { | |
7d9aed26 AG |
1090 | if (efi_uc(md) && |
1091 | (md->type == EFI_CONVENTIONAL_MEMORY || | |
1092 | md->type == EFI_BOOT_SERVICES_DATA)) { | |
d8c97d5f TL |
1093 | k->attribute = EFI_MEMORY_UC; |
1094 | k->start = md->phys_addr; | |
1095 | k->num_pages = md->num_pages; | |
1096 | k++; | |
1097 | } | |
1098 | continue; | |
1099 | } | |
7d9aed26 AG |
1100 | if (pmd == NULL || !efi_wb(pmd) || |
1101 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
1102 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1103 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1104 | for (q = p + efi_desc_size; q < efi_map_end; |
1105 | q += efi_desc_size) { | |
d8c97d5f TL |
1106 | check_md = q; |
1107 | if (!efi_wb(check_md)) | |
1108 | break; | |
1109 | if (contig_high != check_md->phys_addr) | |
1110 | break; | |
1111 | contig_high = efi_md_end(check_md); | |
1112 | } | |
1113 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1114 | } | |
66888a6e | 1115 | if (!is_memory_available(md)) |
d8c97d5f TL |
1116 | continue; |
1117 | ||
e55fdf11 TL |
1118 | #ifdef CONFIG_CRASH_DUMP |
1119 | /* saved_max_pfn should ignore max_addr= command line arg */ | |
1120 | if (saved_max_pfn < (efi_md_end(md) >> PAGE_SHIFT)) | |
1121 | saved_max_pfn = (efi_md_end(md) >> PAGE_SHIFT); | |
1122 | #endif | |
d8c97d5f TL |
1123 | /* |
1124 | * Round ends inward to granule boundaries | |
1125 | * Give trimmings to uncached allocator | |
1126 | */ | |
1127 | if (md->phys_addr < contig_low) { | |
1128 | lim = min(efi_md_end(md), contig_low); | |
1129 | if (efi_uc(md)) { | |
7d9aed26 AG |
1130 | if (k > kern_memmap && |
1131 | (k-1)->attribute == EFI_MEMORY_UC && | |
d8c97d5f | 1132 | kmd_end(k-1) == md->phys_addr) { |
7d9aed26 AG |
1133 | (k-1)->num_pages += |
1134 | (lim - md->phys_addr) | |
1135 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1136 | } else { |
1137 | k->attribute = EFI_MEMORY_UC; | |
1138 | k->start = md->phys_addr; | |
7d9aed26 AG |
1139 | k->num_pages = (lim - md->phys_addr) |
1140 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1141 | k++; |
1142 | } | |
1143 | } | |
1144 | as = contig_low; | |
1145 | } else | |
1146 | as = md->phys_addr; | |
1147 | ||
1148 | if (efi_md_end(md) > contig_high) { | |
1149 | lim = max(md->phys_addr, contig_high); | |
1150 | if (efi_uc(md)) { | |
1151 | if (lim == md->phys_addr && k > kern_memmap && | |
1152 | (k-1)->attribute == EFI_MEMORY_UC && | |
1153 | kmd_end(k-1) == md->phys_addr) { | |
1154 | (k-1)->num_pages += md->num_pages; | |
1155 | } else { | |
1156 | k->attribute = EFI_MEMORY_UC; | |
1157 | k->start = lim; | |
7d9aed26 AG |
1158 | k->num_pages = (efi_md_end(md) - lim) |
1159 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1160 | k++; |
1161 | } | |
1162 | } | |
1163 | ae = contig_high; | |
1164 | } else | |
1165 | ae = efi_md_end(md); | |
1166 | ||
a7956113 ZN |
1167 | /* keep within max_addr= and min_addr= command line arg */ |
1168 | as = max(as, min_addr); | |
d8c97d5f TL |
1169 | ae = min(ae, max_addr); |
1170 | if (ae <= as) | |
1171 | continue; | |
1172 | ||
1173 | /* avoid going over mem= command line arg */ | |
1174 | if (total_mem + (ae - as) > mem_limit) | |
1175 | ae -= total_mem + (ae - as) - mem_limit; | |
1176 | ||
1177 | if (ae <= as) | |
1178 | continue; | |
1179 | if (prev && kmd_end(prev) == md->phys_addr) { | |
1180 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; | |
1181 | total_mem += ae - as; | |
1182 | continue; | |
1183 | } | |
1184 | k->attribute = EFI_MEMORY_WB; | |
1185 | k->start = as; | |
1186 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; | |
1187 | total_mem += ae - as; | |
1188 | prev = k++; | |
1189 | } | |
1190 | k->start = ~0L; /* end-marker */ | |
1191 | ||
1192 | /* reserve the memory we are using for kern_memmap */ | |
1193 | *s = (u64)kern_memmap; | |
1194 | *e = (u64)++k; | |
cb380853 BW |
1195 | |
1196 | return total_mem; | |
d8c97d5f | 1197 | } |
be379124 KA |
1198 | |
1199 | void | |
1200 | efi_initialize_iomem_resources(struct resource *code_resource, | |
00bf4098 BW |
1201 | struct resource *data_resource, |
1202 | struct resource *bss_resource) | |
be379124 KA |
1203 | { |
1204 | struct resource *res; | |
1205 | void *efi_map_start, *efi_map_end, *p; | |
1206 | efi_memory_desc_t *md; | |
1207 | u64 efi_desc_size; | |
1208 | char *name; | |
1209 | unsigned long flags; | |
1210 | ||
1211 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1212 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1213 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1214 | ||
1215 | res = NULL; | |
1216 | ||
1217 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1218 | md = p; | |
1219 | ||
1220 | if (md->num_pages == 0) /* should not happen */ | |
1221 | continue; | |
1222 | ||
887c3cb1 | 1223 | flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
be379124 KA |
1224 | switch (md->type) { |
1225 | ||
1226 | case EFI_MEMORY_MAPPED_IO: | |
1227 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1228 | continue; | |
1229 | ||
1230 | case EFI_LOADER_CODE: | |
1231 | case EFI_LOADER_DATA: | |
1232 | case EFI_BOOT_SERVICES_DATA: | |
1233 | case EFI_BOOT_SERVICES_CODE: | |
1234 | case EFI_CONVENTIONAL_MEMORY: | |
1235 | if (md->attribute & EFI_MEMORY_WP) { | |
1236 | name = "System ROM"; | |
1237 | flags |= IORESOURCE_READONLY; | |
d3758f87 JL |
1238 | } else if (md->attribute == EFI_MEMORY_UC) |
1239 | name = "Uncached RAM"; | |
1240 | else | |
be379124 | 1241 | name = "System RAM"; |
be379124 KA |
1242 | break; |
1243 | ||
1244 | case EFI_ACPI_MEMORY_NVS: | |
1245 | name = "ACPI Non-volatile Storage"; | |
be379124 KA |
1246 | break; |
1247 | ||
1248 | case EFI_UNUSABLE_MEMORY: | |
1249 | name = "reserved"; | |
887c3cb1 | 1250 | flags |= IORESOURCE_DISABLED; |
be379124 KA |
1251 | break; |
1252 | ||
1253 | case EFI_RESERVED_TYPE: | |
1254 | case EFI_RUNTIME_SERVICES_CODE: | |
1255 | case EFI_RUNTIME_SERVICES_DATA: | |
1256 | case EFI_ACPI_RECLAIM_MEMORY: | |
1257 | default: | |
1258 | name = "reserved"; | |
be379124 KA |
1259 | break; |
1260 | } | |
1261 | ||
7d9aed26 AG |
1262 | if ((res = kzalloc(sizeof(struct resource), |
1263 | GFP_KERNEL)) == NULL) { | |
1264 | printk(KERN_ERR | |
965e7c8a | 1265 | "failed to allocate resource for iomem\n"); |
be379124 KA |
1266 | return; |
1267 | } | |
1268 | ||
1269 | res->name = name; | |
1270 | res->start = md->phys_addr; | |
685c7f5d | 1271 | res->end = md->phys_addr + efi_md_size(md) - 1; |
be379124 KA |
1272 | res->flags = flags; |
1273 | ||
1274 | if (insert_resource(&iomem_resource, res) < 0) | |
1275 | kfree(res); | |
1276 | else { | |
1277 | /* | |
1278 | * We don't know which region contains | |
1279 | * kernel data so we try it repeatedly and | |
1280 | * let the resource manager test it. | |
1281 | */ | |
1282 | insert_resource(res, code_resource); | |
1283 | insert_resource(res, data_resource); | |
00bf4098 | 1284 | insert_resource(res, bss_resource); |
a7956113 ZN |
1285 | #ifdef CONFIG_KEXEC |
1286 | insert_resource(res, &efi_memmap_res); | |
1287 | insert_resource(res, &boot_param_res); | |
1288 | if (crashk_res.end > crashk_res.start) | |
1289 | insert_resource(res, &crashk_res); | |
1290 | #endif | |
be379124 KA |
1291 | } |
1292 | } | |
1293 | } | |
a7956113 ZN |
1294 | |
1295 | #ifdef CONFIG_KEXEC | |
1296 | /* find a block of memory aligned to 64M exclude reserved regions | |
1297 | rsvd_regions are sorted | |
1298 | */ | |
2a3a2827 | 1299 | unsigned long __init |
7d9aed26 | 1300 | kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n) |
a7956113 | 1301 | { |
7d9aed26 AG |
1302 | int i; |
1303 | u64 start, end; | |
1304 | u64 alignment = 1UL << _PAGE_SIZE_64M; | |
1305 | void *efi_map_start, *efi_map_end, *p; | |
1306 | efi_memory_desc_t *md; | |
1307 | u64 efi_desc_size; | |
1308 | ||
1309 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1310 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1311 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1312 | ||
1313 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1314 | md = p; | |
1315 | if (!efi_wb(md)) | |
1316 | continue; | |
1317 | start = ALIGN(md->phys_addr, alignment); | |
1318 | end = efi_md_end(md); | |
1319 | for (i = 0; i < n; i++) { | |
1320 | if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { | |
1321 | if (__pa(r[i].start) > start + size) | |
1322 | return start; | |
1323 | start = ALIGN(__pa(r[i].end), alignment); | |
1324 | if (i < n-1 && | |
1325 | __pa(r[i+1].start) < start + size) | |
1326 | continue; | |
1327 | else | |
1328 | break; | |
1329 | } | |
a7956113 | 1330 | } |
7d9aed26 AG |
1331 | if (end > start + size) |
1332 | return start; | |
1333 | } | |
1334 | ||
1335 | printk(KERN_WARNING | |
1336 | "Cannot reserve 0x%lx byte of memory for crashdump\n", size); | |
1337 | return ~0UL; | |
a7956113 ZN |
1338 | } |
1339 | #endif | |
cee87af2 | 1340 | |
d9a9855d | 1341 | #ifdef CONFIG_CRASH_DUMP |
cee87af2 | 1342 | /* locate the size find a the descriptor at a certain address */ |
1775fe85 | 1343 | unsigned long __init |
cee87af2 MD |
1344 | vmcore_find_descriptor_size (unsigned long address) |
1345 | { | |
1346 | void *efi_map_start, *efi_map_end, *p; | |
1347 | efi_memory_desc_t *md; | |
1348 | u64 efi_desc_size; | |
1349 | unsigned long ret = 0; | |
1350 | ||
1351 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1352 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1353 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1354 | ||
1355 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1356 | md = p; | |
1357 | if (efi_wb(md) && md->type == EFI_LOADER_DATA | |
1358 | && md->phys_addr == address) { | |
1359 | ret = efi_md_size(md); | |
1360 | break; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | if (ret == 0) | |
1365 | printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); | |
1366 | ||
1367 | return ret; | |
1368 | } | |
1369 | #endif |