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> |
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> | |
c140d879 | 42 | #include <asm/setup.h> |
2046b94e | 43 | #include <asm/tlbflush.h> |
1da177e4 LT |
44 | |
45 | #define EFI_DEBUG 0 | |
46 | ||
272686bf LL |
47 | static __initdata unsigned long palo_phys; |
48 | ||
49 | static __initdata efi_config_table_type_t arch_tables[] = { | |
50 | {PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID, "PALO", &palo_phys}, | |
51 | {NULL_GUID, NULL, 0}, | |
52 | }; | |
53 | ||
1da177e4 LT |
54 | extern efi_status_t efi_call_phys (void *, ...); |
55 | ||
1da177e4 | 56 | static efi_runtime_services_t *runtime; |
e088a4ad | 57 | static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL; |
1da177e4 LT |
58 | |
59 | #define efi_call_virt(f, args...) (*(f))(args) | |
60 | ||
7d9aed26 AG |
61 | #define STUB_GET_TIME(prefix, adjust_arg) \ |
62 | static efi_status_t \ | |
63 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ | |
64 | { \ | |
65 | struct ia64_fpreg fr[6]; \ | |
66 | efi_time_cap_t *atc = NULL; \ | |
67 | efi_status_t ret; \ | |
68 | \ | |
69 | if (tc) \ | |
70 | atc = adjust_arg(tc); \ | |
71 | ia64_save_scratch_fpregs(fr); \ | |
72 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \ | |
73 | adjust_arg(tm), atc); \ | |
74 | ia64_load_scratch_fpregs(fr); \ | |
75 | return ret; \ | |
1da177e4 LT |
76 | } |
77 | ||
7d9aed26 AG |
78 | #define STUB_SET_TIME(prefix, adjust_arg) \ |
79 | static efi_status_t \ | |
80 | prefix##_set_time (efi_time_t *tm) \ | |
81 | { \ | |
82 | struct ia64_fpreg fr[6]; \ | |
83 | efi_status_t ret; \ | |
84 | \ | |
85 | ia64_save_scratch_fpregs(fr); \ | |
86 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \ | |
87 | adjust_arg(tm)); \ | |
88 | ia64_load_scratch_fpregs(fr); \ | |
89 | return ret; \ | |
1da177e4 LT |
90 | } |
91 | ||
7d9aed26 AG |
92 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ |
93 | static efi_status_t \ | |
94 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \ | |
95 | efi_time_t *tm) \ | |
96 | { \ | |
97 | struct ia64_fpreg fr[6]; \ | |
98 | efi_status_t ret; \ | |
99 | \ | |
100 | ia64_save_scratch_fpregs(fr); \ | |
101 | ret = efi_call_##prefix( \ | |
102 | (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ | |
103 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ | |
104 | ia64_load_scratch_fpregs(fr); \ | |
105 | return ret; \ | |
1da177e4 LT |
106 | } |
107 | ||
7d9aed26 AG |
108 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ |
109 | static efi_status_t \ | |
110 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ | |
111 | { \ | |
112 | struct ia64_fpreg fr[6]; \ | |
113 | efi_time_t *atm = NULL; \ | |
114 | efi_status_t ret; \ | |
115 | \ | |
116 | if (tm) \ | |
117 | atm = adjust_arg(tm); \ | |
118 | ia64_save_scratch_fpregs(fr); \ | |
119 | ret = efi_call_##prefix( \ | |
120 | (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ | |
121 | enabled, atm); \ | |
122 | ia64_load_scratch_fpregs(fr); \ | |
123 | return ret; \ | |
1da177e4 LT |
124 | } |
125 | ||
7d9aed26 AG |
126 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ |
127 | static efi_status_t \ | |
128 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ | |
129 | unsigned long *data_size, void *data) \ | |
130 | { \ | |
131 | struct ia64_fpreg fr[6]; \ | |
132 | u32 *aattr = NULL; \ | |
133 | efi_status_t ret; \ | |
134 | \ | |
135 | if (attr) \ | |
136 | aattr = adjust_arg(attr); \ | |
137 | ia64_save_scratch_fpregs(fr); \ | |
138 | ret = efi_call_##prefix( \ | |
139 | (efi_get_variable_t *) __va(runtime->get_variable), \ | |
140 | adjust_arg(name), adjust_arg(vendor), aattr, \ | |
141 | adjust_arg(data_size), adjust_arg(data)); \ | |
142 | ia64_load_scratch_fpregs(fr); \ | |
143 | return ret; \ | |
1da177e4 LT |
144 | } |
145 | ||
7d9aed26 AG |
146 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ |
147 | static efi_status_t \ | |
148 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \ | |
149 | efi_guid_t *vendor) \ | |
150 | { \ | |
151 | struct ia64_fpreg fr[6]; \ | |
152 | efi_status_t ret; \ | |
153 | \ | |
154 | ia64_save_scratch_fpregs(fr); \ | |
155 | ret = efi_call_##prefix( \ | |
156 | (efi_get_next_variable_t *) __va(runtime->get_next_variable), \ | |
157 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ | |
158 | ia64_load_scratch_fpregs(fr); \ | |
159 | return ret; \ | |
1da177e4 LT |
160 | } |
161 | ||
7d9aed26 AG |
162 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ |
163 | static efi_status_t \ | |
164 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \ | |
1eb9a4b8 | 165 | u32 attr, unsigned long data_size, \ |
7d9aed26 AG |
166 | void *data) \ |
167 | { \ | |
168 | struct ia64_fpreg fr[6]; \ | |
169 | efi_status_t ret; \ | |
170 | \ | |
171 | ia64_save_scratch_fpregs(fr); \ | |
172 | ret = efi_call_##prefix( \ | |
173 | (efi_set_variable_t *) __va(runtime->set_variable), \ | |
174 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ | |
175 | adjust_arg(data)); \ | |
176 | ia64_load_scratch_fpregs(fr); \ | |
177 | return ret; \ | |
1da177e4 LT |
178 | } |
179 | ||
7d9aed26 AG |
180 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ |
181 | static efi_status_t \ | |
182 | prefix##_get_next_high_mono_count (u32 *count) \ | |
183 | { \ | |
184 | struct ia64_fpreg fr[6]; \ | |
185 | efi_status_t ret; \ | |
186 | \ | |
187 | ia64_save_scratch_fpregs(fr); \ | |
188 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ | |
189 | __va(runtime->get_next_high_mono_count), \ | |
190 | adjust_arg(count)); \ | |
191 | ia64_load_scratch_fpregs(fr); \ | |
192 | return ret; \ | |
1da177e4 LT |
193 | } |
194 | ||
7d9aed26 AG |
195 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ |
196 | static void \ | |
197 | prefix##_reset_system (int reset_type, efi_status_t status, \ | |
198 | unsigned long data_size, efi_char16_t *data) \ | |
199 | { \ | |
200 | struct ia64_fpreg fr[6]; \ | |
201 | efi_char16_t *adata = NULL; \ | |
202 | \ | |
203 | if (data) \ | |
204 | adata = adjust_arg(data); \ | |
205 | \ | |
206 | ia64_save_scratch_fpregs(fr); \ | |
207 | efi_call_##prefix( \ | |
208 | (efi_reset_system_t *) __va(runtime->reset_system), \ | |
209 | reset_type, status, data_size, adata); \ | |
210 | /* should not return, but just in case... */ \ | |
211 | ia64_load_scratch_fpregs(fr); \ | |
1da177e4 LT |
212 | } |
213 | ||
214 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) | |
215 | ||
216 | STUB_GET_TIME(phys, phys_ptr) | |
217 | STUB_SET_TIME(phys, phys_ptr) | |
218 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) | |
219 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) | |
220 | STUB_GET_VARIABLE(phys, phys_ptr) | |
221 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) | |
222 | STUB_SET_VARIABLE(phys, phys_ptr) | |
223 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) | |
224 | STUB_RESET_SYSTEM(phys, phys_ptr) | |
225 | ||
226 | #define id(arg) arg | |
227 | ||
228 | STUB_GET_TIME(virt, id) | |
229 | STUB_SET_TIME(virt, id) | |
230 | STUB_GET_WAKEUP_TIME(virt, id) | |
231 | STUB_SET_WAKEUP_TIME(virt, id) | |
232 | STUB_GET_VARIABLE(virt, id) | |
233 | STUB_GET_NEXT_VARIABLE(virt, id) | |
234 | STUB_SET_VARIABLE(virt, id) | |
235 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) | |
236 | STUB_RESET_SYSTEM(virt, id) | |
237 | ||
238 | void | |
239 | efi_gettimeofday (struct timespec *ts) | |
240 | { | |
241 | efi_time_t tm; | |
242 | ||
4b07ae9b LZ |
243 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) { |
244 | memset(ts, 0, sizeof(*ts)); | |
1da177e4 | 245 | return; |
4b07ae9b | 246 | } |
1da177e4 | 247 | |
7d9aed26 AG |
248 | ts->tv_sec = mktime(tm.year, tm.month, tm.day, |
249 | tm.hour, tm.minute, tm.second); | |
1da177e4 LT |
250 | ts->tv_nsec = tm.nanosecond; |
251 | } | |
252 | ||
253 | static int | |
66888a6e | 254 | is_memory_available (efi_memory_desc_t *md) |
1da177e4 LT |
255 | { |
256 | if (!(md->attribute & EFI_MEMORY_WB)) | |
257 | return 0; | |
258 | ||
259 | switch (md->type) { | |
260 | case EFI_LOADER_CODE: | |
261 | case EFI_LOADER_DATA: | |
262 | case EFI_BOOT_SERVICES_CODE: | |
263 | case EFI_BOOT_SERVICES_DATA: | |
264 | case EFI_CONVENTIONAL_MEMORY: | |
265 | return 1; | |
266 | } | |
267 | return 0; | |
268 | } | |
269 | ||
d8c97d5f TL |
270 | typedef struct kern_memdesc { |
271 | u64 attribute; | |
272 | u64 start; | |
273 | u64 num_pages; | |
274 | } kern_memdesc_t; | |
1da177e4 | 275 | |
d8c97d5f | 276 | static kern_memdesc_t *kern_memmap; |
1da177e4 | 277 | |
80851ef2 BH |
278 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
279 | ||
280 | static inline u64 | |
281 | kmd_end(kern_memdesc_t *kmd) | |
282 | { | |
283 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); | |
284 | } | |
285 | ||
286 | static inline u64 | |
287 | efi_md_end(efi_memory_desc_t *md) | |
288 | { | |
289 | return (md->phys_addr + efi_md_size(md)); | |
290 | } | |
291 | ||
292 | static inline int | |
293 | efi_wb(efi_memory_desc_t *md) | |
294 | { | |
295 | return (md->attribute & EFI_MEMORY_WB); | |
296 | } | |
297 | ||
298 | static inline int | |
299 | efi_uc(efi_memory_desc_t *md) | |
300 | { | |
301 | return (md->attribute & EFI_MEMORY_UC); | |
302 | } | |
303 | ||
1da177e4 | 304 | static void |
d8c97d5f | 305 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
1da177e4 | 306 | { |
d8c97d5f TL |
307 | kern_memdesc_t *k; |
308 | u64 start, end, voff; | |
1da177e4 | 309 | |
d8c97d5f TL |
310 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
311 | for (k = kern_memmap; k->start != ~0UL; k++) { | |
312 | if (k->attribute != attr) | |
313 | continue; | |
314 | start = PAGE_ALIGN(k->start); | |
315 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; | |
316 | if (start < end) | |
317 | if ((*callback)(start + voff, end + voff, arg) < 0) | |
318 | return; | |
319 | } | |
1da177e4 LT |
320 | } |
321 | ||
322 | /* | |
965e7c8a | 323 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 324 | * descriptor that has memory that is available for OS use. |
1da177e4 LT |
325 | */ |
326 | void | |
327 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) | |
328 | { | |
d8c97d5f | 329 | walk(callback, arg, EFI_MEMORY_WB); |
1da177e4 LT |
330 | } |
331 | ||
f14f75b8 | 332 | /* |
965e7c8a | 333 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 334 | * descriptor that has memory that is available for uncached allocator. |
f14f75b8 | 335 | */ |
d8c97d5f TL |
336 | void |
337 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) | |
f14f75b8 | 338 | { |
d8c97d5f | 339 | walk(callback, arg, EFI_MEMORY_UC); |
f14f75b8 JS |
340 | } |
341 | ||
1da177e4 | 342 | /* |
965e7c8a | 343 | * Look for the PAL_CODE region reported by EFI and map it using an |
1da177e4 LT |
344 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor |
345 | * Abstraction Layer chapter 11 in ADAG | |
346 | */ | |
1da177e4 LT |
347 | void * |
348 | efi_get_pal_addr (void) | |
349 | { | |
350 | void *efi_map_start, *efi_map_end, *p; | |
351 | efi_memory_desc_t *md; | |
352 | u64 efi_desc_size; | |
353 | int pal_code_count = 0; | |
354 | u64 vaddr, mask; | |
355 | ||
356 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
357 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
358 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
359 | ||
360 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
361 | md = p; | |
362 | if (md->type != EFI_PAL_CODE) | |
363 | continue; | |
364 | ||
365 | if (++pal_code_count > 1) { | |
7d9aed26 | 366 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, " |
e088a4ad | 367 | "dropped @ %llx\n", md->phys_addr); |
1da177e4 LT |
368 | continue; |
369 | } | |
370 | /* | |
7d9aed26 AG |
371 | * The only ITLB entry in region 7 that is used is the one |
372 | * installed by __start(). That entry covers a 64MB range. | |
1da177e4 LT |
373 | */ |
374 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); | |
375 | vaddr = PAGE_OFFSET + md->phys_addr; | |
376 | ||
377 | /* | |
7d9aed26 AG |
378 | * We must check that the PAL mapping won't overlap with the |
379 | * kernel mapping. | |
1da177e4 | 380 | * |
7d9aed26 AG |
381 | * PAL code is guaranteed to be aligned on a power of 2 between |
382 | * 4k and 256KB and that only one ITR is needed to map it. This | |
383 | * implies that the PAL code is always aligned on its size, | |
384 | * i.e., the closest matching page size supported by the TLB. | |
385 | * Therefore PAL code is guaranteed never to cross a 64MB unless | |
386 | * it is bigger than 64MB (very unlikely!). So for now the | |
387 | * following test is enough to determine whether or not we need | |
388 | * a dedicated ITR for the PAL code. | |
1da177e4 LT |
389 | */ |
390 | if ((vaddr & mask) == (KERNEL_START & mask)) { | |
d4ed8084 HH |
391 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", |
392 | __func__); | |
1da177e4 LT |
393 | continue; |
394 | } | |
395 | ||
685c7f5d | 396 | if (efi_md_size(md) > IA64_GRANULE_SIZE) |
965e7c8a | 397 | panic("Whoa! PAL code size bigger than a granule!"); |
1da177e4 LT |
398 | |
399 | #if EFI_DEBUG | |
400 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); | |
401 | ||
7d9aed26 AG |
402 | printk(KERN_INFO "CPU %d: mapping PAL code " |
403 | "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n", | |
404 | smp_processor_id(), md->phys_addr, | |
405 | md->phys_addr + efi_md_size(md), | |
406 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); | |
1da177e4 LT |
407 | #endif |
408 | return __va(md->phys_addr); | |
409 | } | |
9473252f | 410 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n", |
d4ed8084 | 411 | __func__); |
1da177e4 LT |
412 | return NULL; |
413 | } | |
414 | ||
2046b94e FY |
415 | |
416 | static u8 __init palo_checksum(u8 *buffer, u32 length) | |
417 | { | |
418 | u8 sum = 0; | |
419 | u8 *end = buffer + length; | |
420 | ||
421 | while (buffer < end) | |
422 | sum = (u8) (sum + *(buffer++)); | |
423 | ||
424 | return sum; | |
425 | } | |
426 | ||
427 | /* | |
428 | * Parse and handle PALO table which is published at: | |
429 | * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf | |
430 | */ | |
272686bf | 431 | static void __init handle_palo(unsigned long phys_addr) |
2046b94e | 432 | { |
272686bf | 433 | struct palo_table *palo = __va(phys_addr); |
2046b94e FY |
434 | u8 checksum; |
435 | ||
436 | if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) { | |
437 | printk(KERN_INFO "PALO signature incorrect.\n"); | |
438 | return; | |
439 | } | |
440 | ||
441 | checksum = palo_checksum((u8 *)palo, palo->length); | |
442 | if (checksum) { | |
443 | printk(KERN_INFO "PALO checksum incorrect.\n"); | |
444 | return; | |
445 | } | |
446 | ||
a6c75b86 | 447 | setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO); |
2046b94e FY |
448 | } |
449 | ||
1da177e4 LT |
450 | void |
451 | efi_map_pal_code (void) | |
452 | { | |
453 | void *pal_vaddr = efi_get_pal_addr (); | |
454 | u64 psr; | |
455 | ||
456 | if (!pal_vaddr) | |
457 | return; | |
458 | ||
459 | /* | |
460 | * Cannot write to CRx with PSR.ic=1 | |
461 | */ | |
462 | psr = ia64_clear_ic(); | |
7d9aed26 AG |
463 | ia64_itr(0x1, IA64_TR_PALCODE, |
464 | GRANULEROUNDDOWN((unsigned long) pal_vaddr), | |
1da177e4 LT |
465 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), |
466 | IA64_GRANULE_SHIFT); | |
dae17da6 | 467 | paravirt_dv_serialize_data(); |
1da177e4 | 468 | ia64_set_psr(psr); /* restore psr */ |
1da177e4 LT |
469 | } |
470 | ||
471 | void __init | |
472 | efi_init (void) | |
473 | { | |
474 | void *efi_map_start, *efi_map_end; | |
1da177e4 LT |
475 | efi_char16_t *c16; |
476 | u64 efi_desc_size; | |
9d78f43d | 477 | char *cp, vendor[100] = "unknown"; |
1da177e4 LT |
478 | int i; |
479 | ||
09206380 MF |
480 | set_bit(EFI_BOOT, &efi.flags); |
481 | set_bit(EFI_64BIT, &efi.flags); | |
482 | ||
7d9aed26 | 483 | /* |
965e7c8a | 484 | * It's too early to be able to use the standard kernel command line |
7d9aed26 AG |
485 | * support... |
486 | */ | |
a8d91b84 | 487 | for (cp = boot_command_line; *cp; ) { |
1da177e4 | 488 | if (memcmp(cp, "mem=", 4) == 0) { |
9d78f43d | 489 | mem_limit = memparse(cp + 4, &cp); |
1da177e4 | 490 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
9d78f43d | 491 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
a7956113 ZN |
492 | } else if (memcmp(cp, "min_addr=", 9) == 0) { |
493 | min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); | |
1da177e4 LT |
494 | } else { |
495 | while (*cp != ' ' && *cp) | |
496 | ++cp; | |
497 | while (*cp == ' ') | |
498 | ++cp; | |
499 | } | |
500 | } | |
a7956113 | 501 | if (min_addr != 0UL) |
e088a4ad | 502 | printk(KERN_INFO "Ignoring memory below %lluMB\n", |
7d9aed26 | 503 | min_addr >> 20); |
1da177e4 | 504 | if (max_addr != ~0UL) |
e088a4ad | 505 | printk(KERN_INFO "Ignoring memory above %lluMB\n", |
7d9aed26 | 506 | max_addr >> 20); |
1da177e4 LT |
507 | |
508 | efi.systab = __va(ia64_boot_param->efi_systab); | |
509 | ||
510 | /* | |
511 | * Verify the EFI Table | |
512 | */ | |
513 | if (efi.systab == NULL) | |
965e7c8a | 514 | panic("Whoa! Can't find EFI system table.\n"); |
1da177e4 | 515 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
965e7c8a | 516 | panic("Whoa! EFI system table signature incorrect\n"); |
873ec746 BH |
517 | if ((efi.systab->hdr.revision >> 16) == 0) |
518 | printk(KERN_WARNING "Warning: EFI system table version " | |
519 | "%d.%02d, expected 1.00 or greater\n", | |
520 | efi.systab->hdr.revision >> 16, | |
521 | efi.systab->hdr.revision & 0xffff); | |
1da177e4 | 522 | |
1da177e4 LT |
523 | /* Show what we know for posterity */ |
524 | c16 = __va(efi.systab->fw_vendor); | |
525 | if (c16) { | |
ecdd5dab | 526 | for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i) |
1da177e4 LT |
527 | vendor[i] = *c16++; |
528 | vendor[i] = '\0'; | |
529 | } | |
530 | ||
531 | printk(KERN_INFO "EFI v%u.%.02u by %s:", | |
7d9aed26 AG |
532 | efi.systab->hdr.revision >> 16, |
533 | efi.systab->hdr.revision & 0xffff, vendor); | |
1da177e4 | 534 | |
09206380 MF |
535 | set_bit(EFI_SYSTEM_TABLES, &efi.flags); |
536 | ||
2046b94e FY |
537 | palo_phys = EFI_INVALID_TABLE_ADDR; |
538 | ||
272686bf LL |
539 | if (efi_config_init(arch_tables) != 0) |
540 | return; | |
1da177e4 | 541 | |
2046b94e FY |
542 | if (palo_phys != EFI_INVALID_TABLE_ADDR) |
543 | handle_palo(palo_phys); | |
544 | ||
1da177e4 LT |
545 | runtime = __va(efi.systab->runtime); |
546 | efi.get_time = phys_get_time; | |
547 | efi.set_time = phys_set_time; | |
548 | efi.get_wakeup_time = phys_get_wakeup_time; | |
549 | efi.set_wakeup_time = phys_set_wakeup_time; | |
550 | efi.get_variable = phys_get_variable; | |
551 | efi.get_next_variable = phys_get_next_variable; | |
552 | efi.set_variable = phys_set_variable; | |
553 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; | |
554 | efi.reset_system = phys_reset_system; | |
555 | ||
556 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
557 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
558 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
559 | ||
560 | #if EFI_DEBUG | |
561 | /* print EFI memory map: */ | |
562 | { | |
563 | efi_memory_desc_t *md; | |
564 | void *p; | |
565 | ||
7d9aed26 AG |
566 | for (i = 0, p = efi_map_start; p < efi_map_end; |
567 | ++i, p += efi_desc_size) | |
568 | { | |
818c7e86 SH |
569 | const char *unit; |
570 | unsigned long size; | |
571 | ||
1da177e4 | 572 | md = p; |
818c7e86 SH |
573 | size = md->num_pages << EFI_PAGE_SHIFT; |
574 | ||
575 | if ((size >> 40) > 0) { | |
576 | size >>= 40; | |
577 | unit = "TB"; | |
578 | } else if ((size >> 30) > 0) { | |
579 | size >>= 30; | |
580 | unit = "GB"; | |
581 | } else if ((size >> 20) > 0) { | |
582 | size >>= 20; | |
583 | unit = "MB"; | |
584 | } else { | |
585 | size >>= 10; | |
586 | unit = "KB"; | |
587 | } | |
588 | ||
589 | printk("mem%02d: type=%2u, attr=0x%016lx, " | |
590 | "range=[0x%016lx-0x%016lx) (%4lu%s)\n", | |
1da177e4 | 591 | i, md->type, md->attribute, md->phys_addr, |
818c7e86 | 592 | md->phys_addr + efi_md_size(md), size, unit); |
1da177e4 LT |
593 | } |
594 | } | |
595 | #endif | |
596 | ||
597 | efi_map_pal_code(); | |
598 | efi_enter_virtual_mode(); | |
599 | } | |
600 | ||
601 | void | |
602 | efi_enter_virtual_mode (void) | |
603 | { | |
604 | void *efi_map_start, *efi_map_end, *p; | |
605 | efi_memory_desc_t *md; | |
606 | efi_status_t status; | |
607 | u64 efi_desc_size; | |
608 | ||
609 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
610 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
611 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
612 | ||
613 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
614 | md = p; | |
615 | if (md->attribute & EFI_MEMORY_RUNTIME) { | |
616 | /* | |
7d9aed26 AG |
617 | * Some descriptors have multiple bits set, so the |
618 | * order of the tests is relevant. | |
1da177e4 LT |
619 | */ |
620 | if (md->attribute & EFI_MEMORY_WB) { | |
621 | md->virt_addr = (u64) __va(md->phys_addr); | |
622 | } else if (md->attribute & EFI_MEMORY_UC) { | |
623 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
624 | } else if (md->attribute & EFI_MEMORY_WC) { | |
625 | #if 0 | |
7d9aed26 AG |
626 | md->virt_addr = ia64_remap(md->phys_addr, |
627 | (_PAGE_A | | |
628 | _PAGE_P | | |
629 | _PAGE_D | | |
630 | _PAGE_MA_WC | | |
631 | _PAGE_PL_0 | | |
632 | _PAGE_AR_RW)); | |
1da177e4 LT |
633 | #else |
634 | printk(KERN_INFO "EFI_MEMORY_WC mapping\n"); | |
635 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
636 | #endif | |
637 | } else if (md->attribute & EFI_MEMORY_WT) { | |
638 | #if 0 | |
7d9aed26 AG |
639 | md->virt_addr = ia64_remap(md->phys_addr, |
640 | (_PAGE_A | | |
641 | _PAGE_P | | |
642 | _PAGE_D | | |
643 | _PAGE_MA_WT | | |
644 | _PAGE_PL_0 | | |
645 | _PAGE_AR_RW)); | |
1da177e4 LT |
646 | #else |
647 | printk(KERN_INFO "EFI_MEMORY_WT mapping\n"); | |
648 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
649 | #endif | |
650 | } | |
651 | } | |
652 | } | |
653 | ||
654 | status = efi_call_phys(__va(runtime->set_virtual_address_map), | |
655 | ia64_boot_param->efi_memmap_size, | |
7d9aed26 AG |
656 | efi_desc_size, |
657 | ia64_boot_param->efi_memdesc_version, | |
1da177e4 LT |
658 | ia64_boot_param->efi_memmap); |
659 | if (status != EFI_SUCCESS) { | |
7d9aed26 AG |
660 | printk(KERN_WARNING "warning: unable to switch EFI into " |
661 | "virtual mode (status=%lu)\n", status); | |
1da177e4 LT |
662 | return; |
663 | } | |
664 | ||
09206380 MF |
665 | set_bit(EFI_RUNTIME_SERVICES, &efi.flags); |
666 | ||
1da177e4 | 667 | /* |
7d9aed26 AG |
668 | * Now that EFI is in virtual mode, we call the EFI functions more |
669 | * efficiently: | |
1da177e4 LT |
670 | */ |
671 | efi.get_time = virt_get_time; | |
672 | efi.set_time = virt_set_time; | |
673 | efi.get_wakeup_time = virt_get_wakeup_time; | |
674 | efi.set_wakeup_time = virt_set_wakeup_time; | |
675 | efi.get_variable = virt_get_variable; | |
676 | efi.get_next_variable = virt_get_next_variable; | |
677 | efi.set_variable = virt_set_variable; | |
678 | efi.get_next_high_mono_count = virt_get_next_high_mono_count; | |
679 | efi.reset_system = virt_reset_system; | |
680 | } | |
681 | ||
682 | /* | |
7d9aed26 AG |
683 | * Walk the EFI memory map looking for the I/O port range. There can only be |
684 | * one entry of this type, other I/O port ranges should be described via ACPI. | |
1da177e4 LT |
685 | */ |
686 | u64 | |
687 | efi_get_iobase (void) | |
688 | { | |
689 | void *efi_map_start, *efi_map_end, *p; | |
690 | efi_memory_desc_t *md; | |
691 | u64 efi_desc_size; | |
692 | ||
693 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
694 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
695 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
696 | ||
697 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
698 | md = p; | |
699 | if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) { | |
700 | if (md->attribute & EFI_MEMORY_UC) | |
701 | return md->phys_addr; | |
702 | } | |
703 | } | |
704 | return 0; | |
705 | } | |
706 | ||
32e62c63 BH |
707 | static struct kern_memdesc * |
708 | kern_memory_descriptor (unsigned long phys_addr) | |
1da177e4 | 709 | { |
32e62c63 | 710 | struct kern_memdesc *md; |
1da177e4 | 711 | |
32e62c63 BH |
712 | for (md = kern_memmap; md->start != ~0UL; md++) { |
713 | if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) | |
80851ef2 | 714 | return md; |
1da177e4 | 715 | } |
e037cda5 | 716 | return NULL; |
1da177e4 LT |
717 | } |
718 | ||
32e62c63 BH |
719 | static efi_memory_desc_t * |
720 | efi_memory_descriptor (unsigned long phys_addr) | |
1da177e4 LT |
721 | { |
722 | void *efi_map_start, *efi_map_end, *p; | |
723 | efi_memory_desc_t *md; | |
724 | u64 efi_desc_size; | |
725 | ||
726 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
727 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
728 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
729 | ||
730 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
731 | md = p; | |
732 | ||
685c7f5d | 733 | if (phys_addr - md->phys_addr < efi_md_size(md)) |
32e62c63 | 734 | return md; |
1da177e4 | 735 | } |
e037cda5 | 736 | return NULL; |
1da177e4 | 737 | } |
80851ef2 | 738 | |
6d40fc51 BH |
739 | static int |
740 | efi_memmap_intersects (unsigned long phys_addr, unsigned long size) | |
741 | { | |
742 | void *efi_map_start, *efi_map_end, *p; | |
743 | efi_memory_desc_t *md; | |
744 | u64 efi_desc_size; | |
745 | unsigned long end; | |
746 | ||
747 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
748 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
749 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
750 | ||
751 | end = phys_addr + size; | |
752 | ||
753 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
754 | md = p; | |
6d40fc51 BH |
755 | if (md->phys_addr < end && efi_md_end(md) > phys_addr) |
756 | return 1; | |
757 | } | |
758 | return 0; | |
759 | } | |
760 | ||
80851ef2 BH |
761 | u32 |
762 | efi_mem_type (unsigned long phys_addr) | |
763 | { | |
764 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
765 | ||
766 | if (md) | |
767 | return md->type; | |
768 | return 0; | |
769 | } | |
770 | ||
771 | u64 | |
772 | efi_mem_attributes (unsigned long phys_addr) | |
773 | { | |
774 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
775 | ||
776 | if (md) | |
777 | return md->attribute; | |
778 | return 0; | |
779 | } | |
1da177e4 LT |
780 | EXPORT_SYMBOL(efi_mem_attributes); |
781 | ||
32e62c63 BH |
782 | u64 |
783 | efi_mem_attribute (unsigned long phys_addr, unsigned long size) | |
80851ef2 | 784 | { |
136939a2 | 785 | unsigned long end = phys_addr + size; |
80851ef2 | 786 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
32e62c63 BH |
787 | u64 attr; |
788 | ||
789 | if (!md) | |
790 | return 0; | |
791 | ||
792 | /* | |
793 | * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells | |
794 | * the kernel that firmware needs this region mapped. | |
795 | */ | |
796 | attr = md->attribute & ~EFI_MEMORY_RUNTIME; | |
797 | do { | |
798 | unsigned long md_end = efi_md_end(md); | |
799 | ||
800 | if (end <= md_end) | |
801 | return attr; | |
802 | ||
803 | md = efi_memory_descriptor(md_end); | |
804 | if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) | |
805 | return 0; | |
806 | } while (md); | |
410ab512 | 807 | return 0; /* never reached */ |
32e62c63 BH |
808 | } |
809 | ||
810 | u64 | |
811 | kern_mem_attribute (unsigned long phys_addr, unsigned long size) | |
812 | { | |
813 | unsigned long end = phys_addr + size; | |
814 | struct kern_memdesc *md; | |
815 | u64 attr; | |
80851ef2 | 816 | |
136939a2 | 817 | /* |
32e62c63 BH |
818 | * This is a hack for ioremap calls before we set up kern_memmap. |
819 | * Maybe we should do efi_memmap_init() earlier instead. | |
136939a2 | 820 | */ |
32e62c63 BH |
821 | if (!kern_memmap) { |
822 | attr = efi_mem_attribute(phys_addr, size); | |
823 | if (attr & EFI_MEMORY_WB) | |
824 | return EFI_MEMORY_WB; | |
80851ef2 | 825 | return 0; |
136939a2 | 826 | } |
80851ef2 | 827 | |
32e62c63 BH |
828 | md = kern_memory_descriptor(phys_addr); |
829 | if (!md) | |
830 | return 0; | |
831 | ||
832 | attr = md->attribute; | |
80851ef2 | 833 | do { |
32e62c63 | 834 | unsigned long md_end = kmd_end(md); |
136939a2 BH |
835 | |
836 | if (end <= md_end) | |
32e62c63 | 837 | return attr; |
80851ef2 | 838 | |
32e62c63 BH |
839 | md = kern_memory_descriptor(md_end); |
840 | if (!md || md->attribute != attr) | |
136939a2 | 841 | return 0; |
80851ef2 | 842 | } while (md); |
410ab512 | 843 | return 0; /* never reached */ |
80851ef2 | 844 | } |
32e62c63 | 845 | EXPORT_SYMBOL(kern_mem_attribute); |
80851ef2 | 846 | |
1da177e4 | 847 | int |
7e6735c3 | 848 | valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size) |
1da177e4 | 849 | { |
32e62c63 BH |
850 | u64 attr; |
851 | ||
852 | /* | |
853 | * /dev/mem reads and writes use copy_to_user(), which implicitly | |
854 | * uses a granule-sized kernel identity mapping. It's really | |
855 | * only safe to do this for regions in kern_memmap. For more | |
856 | * details, see Documentation/ia64/aliasing.txt. | |
857 | */ | |
858 | attr = kern_mem_attribute(phys_addr, size); | |
859 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) | |
860 | return 1; | |
861 | return 0; | |
80851ef2 | 862 | } |
1da177e4 | 863 | |
80851ef2 | 864 | int |
06c67bef | 865 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
80851ef2 | 866 | { |
6d40fc51 BH |
867 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
868 | u64 attr; | |
869 | ||
870 | attr = efi_mem_attribute(phys_addr, size); | |
871 | ||
32e62c63 | 872 | /* |
6d40fc51 BH |
873 | * /dev/mem mmap uses normal user pages, so we don't need the entire |
874 | * granule, but the entire region we're mapping must support the same | |
875 | * attribute. | |
32e62c63 | 876 | */ |
6d40fc51 BH |
877 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
878 | return 1; | |
879 | ||
880 | /* | |
881 | * Intel firmware doesn't tell us about all the MMIO regions, so | |
882 | * in general we have to allow mmap requests. But if EFI *does* | |
883 | * tell us about anything inside this region, we should deny it. | |
884 | * The user can always map a smaller region to avoid the overlap. | |
885 | */ | |
886 | if (efi_memmap_intersects(phys_addr, size)) | |
887 | return 0; | |
888 | ||
32e62c63 BH |
889 | return 1; |
890 | } | |
1da177e4 | 891 | |
32e62c63 BH |
892 | pgprot_t |
893 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, | |
894 | pgprot_t vma_prot) | |
895 | { | |
896 | unsigned long phys_addr = pfn << PAGE_SHIFT; | |
897 | u64 attr; | |
1da177e4 | 898 | |
32e62c63 BH |
899 | /* |
900 | * For /dev/mem mmap, we use user mappings, but if the region is | |
901 | * in kern_memmap (and hence may be covered by a kernel mapping), | |
902 | * we must use the same attribute as the kernel mapping. | |
903 | */ | |
904 | attr = kern_mem_attribute(phys_addr, size); | |
905 | if (attr & EFI_MEMORY_WB) | |
906 | return pgprot_cacheable(vma_prot); | |
907 | else if (attr & EFI_MEMORY_UC) | |
908 | return pgprot_noncached(vma_prot); | |
909 | ||
910 | /* | |
911 | * Some chipsets don't support UC access to memory. If | |
912 | * WB is supported, we prefer that. | |
913 | */ | |
914 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) | |
915 | return pgprot_cacheable(vma_prot); | |
916 | ||
917 | return pgprot_noncached(vma_prot); | |
1da177e4 LT |
918 | } |
919 | ||
920 | int __init | |
921 | efi_uart_console_only(void) | |
922 | { | |
923 | efi_status_t status; | |
924 | char *s, name[] = "ConOut"; | |
925 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; | |
926 | efi_char16_t *utf16, name_utf16[32]; | |
927 | unsigned char data[1024]; | |
928 | unsigned long size = sizeof(data); | |
929 | struct efi_generic_dev_path *hdr, *end_addr; | |
930 | int uart = 0; | |
931 | ||
932 | /* Convert to UTF-16 */ | |
933 | utf16 = name_utf16; | |
934 | s = name; | |
935 | while (*s) | |
936 | *utf16++ = *s++ & 0x7f; | |
937 | *utf16 = 0; | |
938 | ||
939 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); | |
940 | if (status != EFI_SUCCESS) { | |
941 | printk(KERN_ERR "No EFI %s variable?\n", name); | |
942 | return 0; | |
943 | } | |
944 | ||
945 | hdr = (struct efi_generic_dev_path *) data; | |
946 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); | |
947 | while (hdr < end_addr) { | |
948 | if (hdr->type == EFI_DEV_MSG && | |
949 | hdr->sub_type == EFI_DEV_MSG_UART) | |
950 | uart = 1; | |
951 | else if (hdr->type == EFI_DEV_END_PATH || | |
952 | hdr->type == EFI_DEV_END_PATH2) { | |
953 | if (!uart) | |
954 | return 0; | |
955 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) | |
956 | return 1; | |
957 | uart = 0; | |
958 | } | |
7d9aed26 | 959 | hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length); |
1da177e4 LT |
960 | } |
961 | printk(KERN_ERR "Malformed %s value\n", name); | |
962 | return 0; | |
963 | } | |
d8c97d5f | 964 | |
d8c97d5f TL |
965 | /* |
966 | * Look for the first granule aligned memory descriptor memory | |
967 | * that is big enough to hold EFI memory map. Make sure this | |
968 | * descriptor is atleast granule sized so it does not get trimmed | |
969 | */ | |
970 | struct kern_memdesc * | |
971 | find_memmap_space (void) | |
972 | { | |
973 | u64 contig_low=0, contig_high=0; | |
974 | u64 as = 0, ae; | |
975 | void *efi_map_start, *efi_map_end, *p, *q; | |
976 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
977 | u64 space_needed, efi_desc_size; | |
978 | unsigned long total_mem = 0; | |
979 | ||
980 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
981 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
982 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
983 | ||
984 | /* | |
985 | * Worst case: we need 3 kernel descriptors for each efi descriptor | |
986 | * (if every entry has a WB part in the middle, and UC head and tail), | |
987 | * plus one for the end marker. | |
988 | */ | |
989 | space_needed = sizeof(kern_memdesc_t) * | |
990 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); | |
991 | ||
992 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
993 | md = p; | |
994 | if (!efi_wb(md)) { | |
995 | continue; | |
996 | } | |
7d9aed26 AG |
997 | if (pmd == NULL || !efi_wb(pmd) || |
998 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
999 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1000 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1001 | for (q = p + efi_desc_size; q < efi_map_end; |
1002 | q += efi_desc_size) { | |
d8c97d5f TL |
1003 | check_md = q; |
1004 | if (!efi_wb(check_md)) | |
1005 | break; | |
1006 | if (contig_high != check_md->phys_addr) | |
1007 | break; | |
1008 | contig_high = efi_md_end(check_md); | |
1009 | } | |
1010 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1011 | } | |
66888a6e | 1012 | if (!is_memory_available(md) || md->type == EFI_LOADER_DATA) |
d8c97d5f TL |
1013 | continue; |
1014 | ||
1015 | /* Round ends inward to granule boundaries */ | |
1016 | as = max(contig_low, md->phys_addr); | |
1017 | ae = min(contig_high, efi_md_end(md)); | |
1018 | ||
a7956113 ZN |
1019 | /* keep within max_addr= and min_addr= command line arg */ |
1020 | as = max(as, min_addr); | |
d8c97d5f TL |
1021 | ae = min(ae, max_addr); |
1022 | if (ae <= as) | |
1023 | continue; | |
1024 | ||
1025 | /* avoid going over mem= command line arg */ | |
1026 | if (total_mem + (ae - as) > mem_limit) | |
1027 | ae -= total_mem + (ae - as) - mem_limit; | |
1028 | ||
1029 | if (ae <= as) | |
1030 | continue; | |
1031 | ||
1032 | if (ae - as > space_needed) | |
1033 | break; | |
1034 | } | |
1035 | if (p >= efi_map_end) | |
1036 | panic("Can't allocate space for kernel memory descriptors"); | |
1037 | ||
1038 | return __va(as); | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * Walk the EFI memory map and gather all memory available for kernel | |
1043 | * to use. We can allocate partial granules only if the unavailable | |
1044 | * parts exist, and are WB. | |
1045 | */ | |
cb380853 | 1046 | unsigned long |
e088a4ad | 1047 | efi_memmap_init(u64 *s, u64 *e) |
d8c97d5f | 1048 | { |
e037cda5 | 1049 | struct kern_memdesc *k, *prev = NULL; |
d8c97d5f TL |
1050 | u64 contig_low=0, contig_high=0; |
1051 | u64 as, ae, lim; | |
1052 | void *efi_map_start, *efi_map_end, *p, *q; | |
1053 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
1054 | u64 efi_desc_size; | |
1055 | unsigned long total_mem = 0; | |
1056 | ||
1057 | k = kern_memmap = find_memmap_space(); | |
1058 | ||
1059 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1060 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1061 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1062 | ||
1063 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
1064 | md = p; | |
1065 | if (!efi_wb(md)) { | |
7d9aed26 AG |
1066 | if (efi_uc(md) && |
1067 | (md->type == EFI_CONVENTIONAL_MEMORY || | |
1068 | md->type == EFI_BOOT_SERVICES_DATA)) { | |
d8c97d5f TL |
1069 | k->attribute = EFI_MEMORY_UC; |
1070 | k->start = md->phys_addr; | |
1071 | k->num_pages = md->num_pages; | |
1072 | k++; | |
1073 | } | |
1074 | continue; | |
1075 | } | |
7d9aed26 AG |
1076 | if (pmd == NULL || !efi_wb(pmd) || |
1077 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
1078 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1079 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1080 | for (q = p + efi_desc_size; q < efi_map_end; |
1081 | q += efi_desc_size) { | |
d8c97d5f TL |
1082 | check_md = q; |
1083 | if (!efi_wb(check_md)) | |
1084 | break; | |
1085 | if (contig_high != check_md->phys_addr) | |
1086 | break; | |
1087 | contig_high = efi_md_end(check_md); | |
1088 | } | |
1089 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1090 | } | |
66888a6e | 1091 | if (!is_memory_available(md)) |
d8c97d5f TL |
1092 | continue; |
1093 | ||
1094 | /* | |
1095 | * Round ends inward to granule boundaries | |
1096 | * Give trimmings to uncached allocator | |
1097 | */ | |
1098 | if (md->phys_addr < contig_low) { | |
1099 | lim = min(efi_md_end(md), contig_low); | |
1100 | if (efi_uc(md)) { | |
7d9aed26 AG |
1101 | if (k > kern_memmap && |
1102 | (k-1)->attribute == EFI_MEMORY_UC && | |
d8c97d5f | 1103 | kmd_end(k-1) == md->phys_addr) { |
7d9aed26 AG |
1104 | (k-1)->num_pages += |
1105 | (lim - md->phys_addr) | |
1106 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1107 | } else { |
1108 | k->attribute = EFI_MEMORY_UC; | |
1109 | k->start = md->phys_addr; | |
7d9aed26 AG |
1110 | k->num_pages = (lim - md->phys_addr) |
1111 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1112 | k++; |
1113 | } | |
1114 | } | |
1115 | as = contig_low; | |
1116 | } else | |
1117 | as = md->phys_addr; | |
1118 | ||
1119 | if (efi_md_end(md) > contig_high) { | |
1120 | lim = max(md->phys_addr, contig_high); | |
1121 | if (efi_uc(md)) { | |
1122 | if (lim == md->phys_addr && k > kern_memmap && | |
1123 | (k-1)->attribute == EFI_MEMORY_UC && | |
1124 | kmd_end(k-1) == md->phys_addr) { | |
1125 | (k-1)->num_pages += md->num_pages; | |
1126 | } else { | |
1127 | k->attribute = EFI_MEMORY_UC; | |
1128 | k->start = lim; | |
7d9aed26 AG |
1129 | k->num_pages = (efi_md_end(md) - lim) |
1130 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1131 | k++; |
1132 | } | |
1133 | } | |
1134 | ae = contig_high; | |
1135 | } else | |
1136 | ae = efi_md_end(md); | |
1137 | ||
a7956113 ZN |
1138 | /* keep within max_addr= and min_addr= command line arg */ |
1139 | as = max(as, min_addr); | |
d8c97d5f TL |
1140 | ae = min(ae, max_addr); |
1141 | if (ae <= as) | |
1142 | continue; | |
1143 | ||
1144 | /* avoid going over mem= command line arg */ | |
1145 | if (total_mem + (ae - as) > mem_limit) | |
1146 | ae -= total_mem + (ae - as) - mem_limit; | |
1147 | ||
1148 | if (ae <= as) | |
1149 | continue; | |
1150 | if (prev && kmd_end(prev) == md->phys_addr) { | |
1151 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; | |
1152 | total_mem += ae - as; | |
1153 | continue; | |
1154 | } | |
1155 | k->attribute = EFI_MEMORY_WB; | |
1156 | k->start = as; | |
1157 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; | |
1158 | total_mem += ae - as; | |
1159 | prev = k++; | |
1160 | } | |
1161 | k->start = ~0L; /* end-marker */ | |
1162 | ||
1163 | /* reserve the memory we are using for kern_memmap */ | |
1164 | *s = (u64)kern_memmap; | |
1165 | *e = (u64)++k; | |
cb380853 BW |
1166 | |
1167 | return total_mem; | |
d8c97d5f | 1168 | } |
be379124 KA |
1169 | |
1170 | void | |
1171 | efi_initialize_iomem_resources(struct resource *code_resource, | |
00bf4098 BW |
1172 | struct resource *data_resource, |
1173 | struct resource *bss_resource) | |
be379124 KA |
1174 | { |
1175 | struct resource *res; | |
1176 | void *efi_map_start, *efi_map_end, *p; | |
1177 | efi_memory_desc_t *md; | |
1178 | u64 efi_desc_size; | |
1179 | char *name; | |
1180 | unsigned long flags; | |
1181 | ||
1182 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1183 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1184 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1185 | ||
1186 | res = NULL; | |
1187 | ||
1188 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1189 | md = p; | |
1190 | ||
1191 | if (md->num_pages == 0) /* should not happen */ | |
1192 | continue; | |
1193 | ||
887c3cb1 | 1194 | flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
be379124 KA |
1195 | switch (md->type) { |
1196 | ||
1197 | case EFI_MEMORY_MAPPED_IO: | |
1198 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1199 | continue; | |
1200 | ||
1201 | case EFI_LOADER_CODE: | |
1202 | case EFI_LOADER_DATA: | |
1203 | case EFI_BOOT_SERVICES_DATA: | |
1204 | case EFI_BOOT_SERVICES_CODE: | |
1205 | case EFI_CONVENTIONAL_MEMORY: | |
1206 | if (md->attribute & EFI_MEMORY_WP) { | |
1207 | name = "System ROM"; | |
1208 | flags |= IORESOURCE_READONLY; | |
d3758f87 JL |
1209 | } else if (md->attribute == EFI_MEMORY_UC) |
1210 | name = "Uncached RAM"; | |
1211 | else | |
be379124 | 1212 | name = "System RAM"; |
be379124 KA |
1213 | break; |
1214 | ||
1215 | case EFI_ACPI_MEMORY_NVS: | |
1216 | name = "ACPI Non-volatile Storage"; | |
be379124 KA |
1217 | break; |
1218 | ||
1219 | case EFI_UNUSABLE_MEMORY: | |
1220 | name = "reserved"; | |
887c3cb1 | 1221 | flags |= IORESOURCE_DISABLED; |
be379124 KA |
1222 | break; |
1223 | ||
1224 | case EFI_RESERVED_TYPE: | |
1225 | case EFI_RUNTIME_SERVICES_CODE: | |
1226 | case EFI_RUNTIME_SERVICES_DATA: | |
1227 | case EFI_ACPI_RECLAIM_MEMORY: | |
1228 | default: | |
1229 | name = "reserved"; | |
be379124 KA |
1230 | break; |
1231 | } | |
1232 | ||
7d9aed26 AG |
1233 | if ((res = kzalloc(sizeof(struct resource), |
1234 | GFP_KERNEL)) == NULL) { | |
1235 | printk(KERN_ERR | |
965e7c8a | 1236 | "failed to allocate resource for iomem\n"); |
be379124 KA |
1237 | return; |
1238 | } | |
1239 | ||
1240 | res->name = name; | |
1241 | res->start = md->phys_addr; | |
685c7f5d | 1242 | res->end = md->phys_addr + efi_md_size(md) - 1; |
be379124 KA |
1243 | res->flags = flags; |
1244 | ||
1245 | if (insert_resource(&iomem_resource, res) < 0) | |
1246 | kfree(res); | |
1247 | else { | |
1248 | /* | |
1249 | * We don't know which region contains | |
1250 | * kernel data so we try it repeatedly and | |
1251 | * let the resource manager test it. | |
1252 | */ | |
1253 | insert_resource(res, code_resource); | |
1254 | insert_resource(res, data_resource); | |
00bf4098 | 1255 | insert_resource(res, bss_resource); |
a7956113 ZN |
1256 | #ifdef CONFIG_KEXEC |
1257 | insert_resource(res, &efi_memmap_res); | |
1258 | insert_resource(res, &boot_param_res); | |
1259 | if (crashk_res.end > crashk_res.start) | |
1260 | insert_resource(res, &crashk_res); | |
1261 | #endif | |
be379124 KA |
1262 | } |
1263 | } | |
1264 | } | |
a7956113 ZN |
1265 | |
1266 | #ifdef CONFIG_KEXEC | |
1267 | /* find a block of memory aligned to 64M exclude reserved regions | |
1268 | rsvd_regions are sorted | |
1269 | */ | |
2a3a2827 | 1270 | unsigned long __init |
7d9aed26 | 1271 | kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n) |
a7956113 | 1272 | { |
7d9aed26 AG |
1273 | int i; |
1274 | u64 start, end; | |
1275 | u64 alignment = 1UL << _PAGE_SIZE_64M; | |
1276 | void *efi_map_start, *efi_map_end, *p; | |
1277 | efi_memory_desc_t *md; | |
1278 | u64 efi_desc_size; | |
1279 | ||
1280 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1281 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1282 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1283 | ||
1284 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1285 | md = p; | |
1286 | if (!efi_wb(md)) | |
1287 | continue; | |
1288 | start = ALIGN(md->phys_addr, alignment); | |
1289 | end = efi_md_end(md); | |
1290 | for (i = 0; i < n; i++) { | |
1291 | if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { | |
1292 | if (__pa(r[i].start) > start + size) | |
1293 | return start; | |
1294 | start = ALIGN(__pa(r[i].end), alignment); | |
1295 | if (i < n-1 && | |
1296 | __pa(r[i+1].start) < start + size) | |
1297 | continue; | |
1298 | else | |
1299 | break; | |
1300 | } | |
a7956113 | 1301 | } |
7d9aed26 AG |
1302 | if (end > start + size) |
1303 | return start; | |
1304 | } | |
1305 | ||
1306 | printk(KERN_WARNING | |
1307 | "Cannot reserve 0x%lx byte of memory for crashdump\n", size); | |
1308 | return ~0UL; | |
a7956113 ZN |
1309 | } |
1310 | #endif | |
cee87af2 | 1311 | |
d9a9855d | 1312 | #ifdef CONFIG_CRASH_DUMP |
cee87af2 | 1313 | /* locate the size find a the descriptor at a certain address */ |
1775fe85 | 1314 | unsigned long __init |
cee87af2 MD |
1315 | vmcore_find_descriptor_size (unsigned long address) |
1316 | { | |
1317 | void *efi_map_start, *efi_map_end, *p; | |
1318 | efi_memory_desc_t *md; | |
1319 | u64 efi_desc_size; | |
1320 | unsigned long ret = 0; | |
1321 | ||
1322 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1323 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1324 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1325 | ||
1326 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1327 | md = p; | |
1328 | if (efi_wb(md) && md->type == EFI_LOADER_DATA | |
1329 | && md->phys_addr == address) { | |
1330 | ret = efi_md_size(md); | |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | if (ret == 0) | |
1336 | printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); | |
1337 | ||
1338 | return ret; | |
1339 | } | |
1340 | #endif |