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