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); | |
467 | ia64_set_psr(psr); /* restore psr */ | |
1da177e4 LT |
468 | } |
469 | ||
470 | void __init | |
471 | efi_init (void) | |
472 | { | |
473 | void *efi_map_start, *efi_map_end; | |
1da177e4 LT |
474 | efi_char16_t *c16; |
475 | u64 efi_desc_size; | |
9d78f43d | 476 | char *cp, vendor[100] = "unknown"; |
1da177e4 LT |
477 | int i; |
478 | ||
09206380 MF |
479 | set_bit(EFI_BOOT, &efi.flags); |
480 | set_bit(EFI_64BIT, &efi.flags); | |
481 | ||
7d9aed26 | 482 | /* |
965e7c8a | 483 | * It's too early to be able to use the standard kernel command line |
7d9aed26 AG |
484 | * support... |
485 | */ | |
a8d91b84 | 486 | for (cp = boot_command_line; *cp; ) { |
1da177e4 | 487 | if (memcmp(cp, "mem=", 4) == 0) { |
9d78f43d | 488 | mem_limit = memparse(cp + 4, &cp); |
1da177e4 | 489 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
9d78f43d | 490 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
a7956113 ZN |
491 | } else if (memcmp(cp, "min_addr=", 9) == 0) { |
492 | min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); | |
1da177e4 LT |
493 | } else { |
494 | while (*cp != ' ' && *cp) | |
495 | ++cp; | |
496 | while (*cp == ' ') | |
497 | ++cp; | |
498 | } | |
499 | } | |
a7956113 | 500 | if (min_addr != 0UL) |
e088a4ad | 501 | printk(KERN_INFO "Ignoring memory below %lluMB\n", |
7d9aed26 | 502 | min_addr >> 20); |
1da177e4 | 503 | if (max_addr != ~0UL) |
e088a4ad | 504 | printk(KERN_INFO "Ignoring memory above %lluMB\n", |
7d9aed26 | 505 | max_addr >> 20); |
1da177e4 LT |
506 | |
507 | efi.systab = __va(ia64_boot_param->efi_systab); | |
508 | ||
509 | /* | |
510 | * Verify the EFI Table | |
511 | */ | |
512 | if (efi.systab == NULL) | |
965e7c8a | 513 | panic("Whoa! Can't find EFI system table.\n"); |
1da177e4 | 514 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
965e7c8a | 515 | panic("Whoa! EFI system table signature incorrect\n"); |
873ec746 BH |
516 | if ((efi.systab->hdr.revision >> 16) == 0) |
517 | printk(KERN_WARNING "Warning: EFI system table version " | |
518 | "%d.%02d, expected 1.00 or greater\n", | |
519 | efi.systab->hdr.revision >> 16, | |
520 | efi.systab->hdr.revision & 0xffff); | |
1da177e4 | 521 | |
1da177e4 LT |
522 | /* Show what we know for posterity */ |
523 | c16 = __va(efi.systab->fw_vendor); | |
524 | if (c16) { | |
ecdd5dab | 525 | for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i) |
1da177e4 LT |
526 | vendor[i] = *c16++; |
527 | vendor[i] = '\0'; | |
528 | } | |
529 | ||
530 | printk(KERN_INFO "EFI v%u.%.02u by %s:", | |
7d9aed26 AG |
531 | efi.systab->hdr.revision >> 16, |
532 | efi.systab->hdr.revision & 0xffff, vendor); | |
1da177e4 | 533 | |
09206380 MF |
534 | set_bit(EFI_SYSTEM_TABLES, &efi.flags); |
535 | ||
2046b94e FY |
536 | palo_phys = EFI_INVALID_TABLE_ADDR; |
537 | ||
272686bf LL |
538 | if (efi_config_init(arch_tables) != 0) |
539 | return; | |
1da177e4 | 540 | |
2046b94e FY |
541 | if (palo_phys != EFI_INVALID_TABLE_ADDR) |
542 | handle_palo(palo_phys); | |
543 | ||
1da177e4 LT |
544 | runtime = __va(efi.systab->runtime); |
545 | efi.get_time = phys_get_time; | |
546 | efi.set_time = phys_set_time; | |
547 | efi.get_wakeup_time = phys_get_wakeup_time; | |
548 | efi.set_wakeup_time = phys_set_wakeup_time; | |
549 | efi.get_variable = phys_get_variable; | |
550 | efi.get_next_variable = phys_get_next_variable; | |
551 | efi.set_variable = phys_set_variable; | |
552 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; | |
553 | efi.reset_system = phys_reset_system; | |
554 | ||
555 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
556 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
557 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
558 | ||
559 | #if EFI_DEBUG | |
560 | /* print EFI memory map: */ | |
561 | { | |
562 | efi_memory_desc_t *md; | |
563 | void *p; | |
564 | ||
7d9aed26 AG |
565 | for (i = 0, p = efi_map_start; p < efi_map_end; |
566 | ++i, p += efi_desc_size) | |
567 | { | |
818c7e86 SH |
568 | const char *unit; |
569 | unsigned long size; | |
77b12bcf | 570 | char buf[64]; |
818c7e86 | 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 | ||
77b12bcf | 589 | printk("mem%02d: %s " |
818c7e86 | 590 | "range=[0x%016lx-0x%016lx) (%4lu%s)\n", |
77b12bcf LE |
591 | i, efi_md_typeattr_format(buf, sizeof(buf), md), |
592 | md->phys_addr, | |
818c7e86 | 593 | md->phys_addr + efi_md_size(md), size, unit); |
1da177e4 LT |
594 | } |
595 | } | |
596 | #endif | |
597 | ||
598 | efi_map_pal_code(); | |
599 | efi_enter_virtual_mode(); | |
600 | } | |
601 | ||
602 | void | |
603 | efi_enter_virtual_mode (void) | |
604 | { | |
605 | void *efi_map_start, *efi_map_end, *p; | |
606 | efi_memory_desc_t *md; | |
607 | efi_status_t status; | |
608 | u64 efi_desc_size; | |
609 | ||
610 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
611 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
612 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
613 | ||
614 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
615 | md = p; | |
616 | if (md->attribute & EFI_MEMORY_RUNTIME) { | |
617 | /* | |
7d9aed26 AG |
618 | * Some descriptors have multiple bits set, so the |
619 | * order of the tests is relevant. | |
1da177e4 LT |
620 | */ |
621 | if (md->attribute & EFI_MEMORY_WB) { | |
622 | md->virt_addr = (u64) __va(md->phys_addr); | |
623 | } else if (md->attribute & EFI_MEMORY_UC) { | |
624 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
625 | } else if (md->attribute & EFI_MEMORY_WC) { | |
626 | #if 0 | |
7d9aed26 AG |
627 | md->virt_addr = ia64_remap(md->phys_addr, |
628 | (_PAGE_A | | |
629 | _PAGE_P | | |
630 | _PAGE_D | | |
631 | _PAGE_MA_WC | | |
632 | _PAGE_PL_0 | | |
633 | _PAGE_AR_RW)); | |
1da177e4 LT |
634 | #else |
635 | printk(KERN_INFO "EFI_MEMORY_WC mapping\n"); | |
636 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
637 | #endif | |
638 | } else if (md->attribute & EFI_MEMORY_WT) { | |
639 | #if 0 | |
7d9aed26 AG |
640 | md->virt_addr = ia64_remap(md->phys_addr, |
641 | (_PAGE_A | | |
642 | _PAGE_P | | |
643 | _PAGE_D | | |
644 | _PAGE_MA_WT | | |
645 | _PAGE_PL_0 | | |
646 | _PAGE_AR_RW)); | |
1da177e4 LT |
647 | #else |
648 | printk(KERN_INFO "EFI_MEMORY_WT mapping\n"); | |
649 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
650 | #endif | |
651 | } | |
652 | } | |
653 | } | |
654 | ||
655 | status = efi_call_phys(__va(runtime->set_virtual_address_map), | |
656 | ia64_boot_param->efi_memmap_size, | |
7d9aed26 AG |
657 | efi_desc_size, |
658 | ia64_boot_param->efi_memdesc_version, | |
1da177e4 LT |
659 | ia64_boot_param->efi_memmap); |
660 | if (status != EFI_SUCCESS) { | |
7d9aed26 AG |
661 | printk(KERN_WARNING "warning: unable to switch EFI into " |
662 | "virtual mode (status=%lu)\n", status); | |
1da177e4 LT |
663 | return; |
664 | } | |
665 | ||
09206380 MF |
666 | set_bit(EFI_RUNTIME_SERVICES, &efi.flags); |
667 | ||
1da177e4 | 668 | /* |
7d9aed26 AG |
669 | * Now that EFI is in virtual mode, we call the EFI functions more |
670 | * efficiently: | |
1da177e4 LT |
671 | */ |
672 | efi.get_time = virt_get_time; | |
673 | efi.set_time = virt_set_time; | |
674 | efi.get_wakeup_time = virt_get_wakeup_time; | |
675 | efi.set_wakeup_time = virt_set_wakeup_time; | |
676 | efi.get_variable = virt_get_variable; | |
677 | efi.get_next_variable = virt_get_next_variable; | |
678 | efi.set_variable = virt_set_variable; | |
679 | efi.get_next_high_mono_count = virt_get_next_high_mono_count; | |
680 | efi.reset_system = virt_reset_system; | |
681 | } | |
682 | ||
683 | /* | |
7d9aed26 AG |
684 | * Walk the EFI memory map looking for the I/O port range. There can only be |
685 | * one entry of this type, other I/O port ranges should be described via ACPI. | |
1da177e4 LT |
686 | */ |
687 | u64 | |
688 | efi_get_iobase (void) | |
689 | { | |
690 | void *efi_map_start, *efi_map_end, *p; | |
691 | efi_memory_desc_t *md; | |
692 | u64 efi_desc_size; | |
693 | ||
694 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
695 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
696 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
697 | ||
698 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
699 | md = p; | |
700 | if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) { | |
701 | if (md->attribute & EFI_MEMORY_UC) | |
702 | return md->phys_addr; | |
703 | } | |
704 | } | |
705 | return 0; | |
706 | } | |
707 | ||
32e62c63 BH |
708 | static struct kern_memdesc * |
709 | kern_memory_descriptor (unsigned long phys_addr) | |
1da177e4 | 710 | { |
32e62c63 | 711 | struct kern_memdesc *md; |
1da177e4 | 712 | |
32e62c63 BH |
713 | for (md = kern_memmap; md->start != ~0UL; md++) { |
714 | if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) | |
80851ef2 | 715 | return md; |
1da177e4 | 716 | } |
e037cda5 | 717 | return NULL; |
1da177e4 LT |
718 | } |
719 | ||
32e62c63 BH |
720 | static efi_memory_desc_t * |
721 | efi_memory_descriptor (unsigned long phys_addr) | |
1da177e4 LT |
722 | { |
723 | void *efi_map_start, *efi_map_end, *p; | |
724 | efi_memory_desc_t *md; | |
725 | u64 efi_desc_size; | |
726 | ||
727 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
728 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
729 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
730 | ||
731 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
732 | md = p; | |
733 | ||
685c7f5d | 734 | if (phys_addr - md->phys_addr < efi_md_size(md)) |
32e62c63 | 735 | return md; |
1da177e4 | 736 | } |
e037cda5 | 737 | return NULL; |
1da177e4 | 738 | } |
80851ef2 | 739 | |
6d40fc51 BH |
740 | static int |
741 | efi_memmap_intersects (unsigned long phys_addr, unsigned long size) | |
742 | { | |
743 | void *efi_map_start, *efi_map_end, *p; | |
744 | efi_memory_desc_t *md; | |
745 | u64 efi_desc_size; | |
746 | unsigned long end; | |
747 | ||
748 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
749 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
750 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
751 | ||
752 | end = phys_addr + size; | |
753 | ||
754 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
755 | md = p; | |
6d40fc51 BH |
756 | if (md->phys_addr < end && efi_md_end(md) > phys_addr) |
757 | return 1; | |
758 | } | |
759 | return 0; | |
760 | } | |
761 | ||
80851ef2 BH |
762 | u32 |
763 | efi_mem_type (unsigned long phys_addr) | |
764 | { | |
765 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
766 | ||
767 | if (md) | |
768 | return md->type; | |
769 | return 0; | |
770 | } | |
771 | ||
772 | u64 | |
773 | efi_mem_attributes (unsigned long phys_addr) | |
774 | { | |
775 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
776 | ||
777 | if (md) | |
778 | return md->attribute; | |
779 | return 0; | |
780 | } | |
1da177e4 LT |
781 | EXPORT_SYMBOL(efi_mem_attributes); |
782 | ||
32e62c63 BH |
783 | u64 |
784 | efi_mem_attribute (unsigned long phys_addr, unsigned long size) | |
80851ef2 | 785 | { |
136939a2 | 786 | unsigned long end = phys_addr + size; |
80851ef2 | 787 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
32e62c63 BH |
788 | u64 attr; |
789 | ||
790 | if (!md) | |
791 | return 0; | |
792 | ||
793 | /* | |
794 | * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells | |
795 | * the kernel that firmware needs this region mapped. | |
796 | */ | |
797 | attr = md->attribute & ~EFI_MEMORY_RUNTIME; | |
798 | do { | |
799 | unsigned long md_end = efi_md_end(md); | |
800 | ||
801 | if (end <= md_end) | |
802 | return attr; | |
803 | ||
804 | md = efi_memory_descriptor(md_end); | |
805 | if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) | |
806 | return 0; | |
807 | } while (md); | |
410ab512 | 808 | return 0; /* never reached */ |
32e62c63 BH |
809 | } |
810 | ||
811 | u64 | |
812 | kern_mem_attribute (unsigned long phys_addr, unsigned long size) | |
813 | { | |
814 | unsigned long end = phys_addr + size; | |
815 | struct kern_memdesc *md; | |
816 | u64 attr; | |
80851ef2 | 817 | |
136939a2 | 818 | /* |
32e62c63 BH |
819 | * This is a hack for ioremap calls before we set up kern_memmap. |
820 | * Maybe we should do efi_memmap_init() earlier instead. | |
136939a2 | 821 | */ |
32e62c63 BH |
822 | if (!kern_memmap) { |
823 | attr = efi_mem_attribute(phys_addr, size); | |
824 | if (attr & EFI_MEMORY_WB) | |
825 | return EFI_MEMORY_WB; | |
80851ef2 | 826 | return 0; |
136939a2 | 827 | } |
80851ef2 | 828 | |
32e62c63 BH |
829 | md = kern_memory_descriptor(phys_addr); |
830 | if (!md) | |
831 | return 0; | |
832 | ||
833 | attr = md->attribute; | |
80851ef2 | 834 | do { |
32e62c63 | 835 | unsigned long md_end = kmd_end(md); |
136939a2 BH |
836 | |
837 | if (end <= md_end) | |
32e62c63 | 838 | return attr; |
80851ef2 | 839 | |
32e62c63 BH |
840 | md = kern_memory_descriptor(md_end); |
841 | if (!md || md->attribute != attr) | |
136939a2 | 842 | return 0; |
80851ef2 | 843 | } while (md); |
410ab512 | 844 | return 0; /* never reached */ |
80851ef2 | 845 | } |
32e62c63 | 846 | EXPORT_SYMBOL(kern_mem_attribute); |
80851ef2 | 847 | |
1da177e4 | 848 | int |
7e6735c3 | 849 | valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size) |
1da177e4 | 850 | { |
32e62c63 BH |
851 | u64 attr; |
852 | ||
853 | /* | |
854 | * /dev/mem reads and writes use copy_to_user(), which implicitly | |
855 | * uses a granule-sized kernel identity mapping. It's really | |
856 | * only safe to do this for regions in kern_memmap. For more | |
857 | * details, see Documentation/ia64/aliasing.txt. | |
858 | */ | |
859 | attr = kern_mem_attribute(phys_addr, size); | |
860 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) | |
861 | return 1; | |
862 | return 0; | |
80851ef2 | 863 | } |
1da177e4 | 864 | |
80851ef2 | 865 | int |
06c67bef | 866 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
80851ef2 | 867 | { |
6d40fc51 BH |
868 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
869 | u64 attr; | |
870 | ||
871 | attr = efi_mem_attribute(phys_addr, size); | |
872 | ||
32e62c63 | 873 | /* |
6d40fc51 BH |
874 | * /dev/mem mmap uses normal user pages, so we don't need the entire |
875 | * granule, but the entire region we're mapping must support the same | |
876 | * attribute. | |
32e62c63 | 877 | */ |
6d40fc51 BH |
878 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
879 | return 1; | |
880 | ||
881 | /* | |
882 | * Intel firmware doesn't tell us about all the MMIO regions, so | |
883 | * in general we have to allow mmap requests. But if EFI *does* | |
884 | * tell us about anything inside this region, we should deny it. | |
885 | * The user can always map a smaller region to avoid the overlap. | |
886 | */ | |
887 | if (efi_memmap_intersects(phys_addr, size)) | |
888 | return 0; | |
889 | ||
32e62c63 BH |
890 | return 1; |
891 | } | |
1da177e4 | 892 | |
32e62c63 BH |
893 | pgprot_t |
894 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, | |
895 | pgprot_t vma_prot) | |
896 | { | |
897 | unsigned long phys_addr = pfn << PAGE_SHIFT; | |
898 | u64 attr; | |
1da177e4 | 899 | |
32e62c63 BH |
900 | /* |
901 | * For /dev/mem mmap, we use user mappings, but if the region is | |
902 | * in kern_memmap (and hence may be covered by a kernel mapping), | |
903 | * we must use the same attribute as the kernel mapping. | |
904 | */ | |
905 | attr = kern_mem_attribute(phys_addr, size); | |
906 | if (attr & EFI_MEMORY_WB) | |
907 | return pgprot_cacheable(vma_prot); | |
908 | else if (attr & EFI_MEMORY_UC) | |
909 | return pgprot_noncached(vma_prot); | |
910 | ||
911 | /* | |
912 | * Some chipsets don't support UC access to memory. If | |
913 | * WB is supported, we prefer that. | |
914 | */ | |
915 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) | |
916 | return pgprot_cacheable(vma_prot); | |
917 | ||
918 | return pgprot_noncached(vma_prot); | |
1da177e4 LT |
919 | } |
920 | ||
921 | int __init | |
922 | efi_uart_console_only(void) | |
923 | { | |
924 | efi_status_t status; | |
925 | char *s, name[] = "ConOut"; | |
926 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; | |
927 | efi_char16_t *utf16, name_utf16[32]; | |
928 | unsigned char data[1024]; | |
929 | unsigned long size = sizeof(data); | |
930 | struct efi_generic_dev_path *hdr, *end_addr; | |
931 | int uart = 0; | |
932 | ||
933 | /* Convert to UTF-16 */ | |
934 | utf16 = name_utf16; | |
935 | s = name; | |
936 | while (*s) | |
937 | *utf16++ = *s++ & 0x7f; | |
938 | *utf16 = 0; | |
939 | ||
940 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); | |
941 | if (status != EFI_SUCCESS) { | |
942 | printk(KERN_ERR "No EFI %s variable?\n", name); | |
943 | return 0; | |
944 | } | |
945 | ||
946 | hdr = (struct efi_generic_dev_path *) data; | |
947 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); | |
948 | while (hdr < end_addr) { | |
949 | if (hdr->type == EFI_DEV_MSG && | |
950 | hdr->sub_type == EFI_DEV_MSG_UART) | |
951 | uart = 1; | |
952 | else if (hdr->type == EFI_DEV_END_PATH || | |
953 | hdr->type == EFI_DEV_END_PATH2) { | |
954 | if (!uart) | |
955 | return 0; | |
956 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) | |
957 | return 1; | |
958 | uart = 0; | |
959 | } | |
7d9aed26 | 960 | hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length); |
1da177e4 LT |
961 | } |
962 | printk(KERN_ERR "Malformed %s value\n", name); | |
963 | return 0; | |
964 | } | |
d8c97d5f | 965 | |
d8c97d5f TL |
966 | /* |
967 | * Look for the first granule aligned memory descriptor memory | |
968 | * that is big enough to hold EFI memory map. Make sure this | |
969 | * descriptor is atleast granule sized so it does not get trimmed | |
970 | */ | |
971 | struct kern_memdesc * | |
972 | find_memmap_space (void) | |
973 | { | |
974 | u64 contig_low=0, contig_high=0; | |
975 | u64 as = 0, ae; | |
976 | void *efi_map_start, *efi_map_end, *p, *q; | |
977 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
978 | u64 space_needed, efi_desc_size; | |
979 | unsigned long total_mem = 0; | |
980 | ||
981 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
982 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
983 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
984 | ||
985 | /* | |
986 | * Worst case: we need 3 kernel descriptors for each efi descriptor | |
987 | * (if every entry has a WB part in the middle, and UC head and tail), | |
988 | * plus one for the end marker. | |
989 | */ | |
990 | space_needed = sizeof(kern_memdesc_t) * | |
991 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); | |
992 | ||
993 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
994 | md = p; | |
995 | if (!efi_wb(md)) { | |
996 | continue; | |
997 | } | |
7d9aed26 AG |
998 | if (pmd == NULL || !efi_wb(pmd) || |
999 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
1000 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1001 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1002 | for (q = p + efi_desc_size; q < efi_map_end; |
1003 | q += efi_desc_size) { | |
d8c97d5f TL |
1004 | check_md = q; |
1005 | if (!efi_wb(check_md)) | |
1006 | break; | |
1007 | if (contig_high != check_md->phys_addr) | |
1008 | break; | |
1009 | contig_high = efi_md_end(check_md); | |
1010 | } | |
1011 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1012 | } | |
66888a6e | 1013 | if (!is_memory_available(md) || md->type == EFI_LOADER_DATA) |
d8c97d5f TL |
1014 | continue; |
1015 | ||
1016 | /* Round ends inward to granule boundaries */ | |
1017 | as = max(contig_low, md->phys_addr); | |
1018 | ae = min(contig_high, efi_md_end(md)); | |
1019 | ||
a7956113 ZN |
1020 | /* keep within max_addr= and min_addr= command line arg */ |
1021 | as = max(as, min_addr); | |
d8c97d5f TL |
1022 | ae = min(ae, max_addr); |
1023 | if (ae <= as) | |
1024 | continue; | |
1025 | ||
1026 | /* avoid going over mem= command line arg */ | |
1027 | if (total_mem + (ae - as) > mem_limit) | |
1028 | ae -= total_mem + (ae - as) - mem_limit; | |
1029 | ||
1030 | if (ae <= as) | |
1031 | continue; | |
1032 | ||
1033 | if (ae - as > space_needed) | |
1034 | break; | |
1035 | } | |
1036 | if (p >= efi_map_end) | |
1037 | panic("Can't allocate space for kernel memory descriptors"); | |
1038 | ||
1039 | return __va(as); | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * Walk the EFI memory map and gather all memory available for kernel | |
1044 | * to use. We can allocate partial granules only if the unavailable | |
1045 | * parts exist, and are WB. | |
1046 | */ | |
cb380853 | 1047 | unsigned long |
e088a4ad | 1048 | efi_memmap_init(u64 *s, u64 *e) |
d8c97d5f | 1049 | { |
e037cda5 | 1050 | struct kern_memdesc *k, *prev = NULL; |
d8c97d5f TL |
1051 | u64 contig_low=0, contig_high=0; |
1052 | u64 as, ae, lim; | |
1053 | void *efi_map_start, *efi_map_end, *p, *q; | |
1054 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
1055 | u64 efi_desc_size; | |
1056 | unsigned long total_mem = 0; | |
1057 | ||
1058 | k = kern_memmap = find_memmap_space(); | |
1059 | ||
1060 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1061 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1062 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1063 | ||
1064 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
1065 | md = p; | |
1066 | if (!efi_wb(md)) { | |
7d9aed26 AG |
1067 | if (efi_uc(md) && |
1068 | (md->type == EFI_CONVENTIONAL_MEMORY || | |
1069 | md->type == EFI_BOOT_SERVICES_DATA)) { | |
d8c97d5f TL |
1070 | k->attribute = EFI_MEMORY_UC; |
1071 | k->start = md->phys_addr; | |
1072 | k->num_pages = md->num_pages; | |
1073 | k++; | |
1074 | } | |
1075 | continue; | |
1076 | } | |
7d9aed26 AG |
1077 | if (pmd == NULL || !efi_wb(pmd) || |
1078 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
1079 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1080 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1081 | for (q = p + efi_desc_size; q < efi_map_end; |
1082 | q += efi_desc_size) { | |
d8c97d5f TL |
1083 | check_md = q; |
1084 | if (!efi_wb(check_md)) | |
1085 | break; | |
1086 | if (contig_high != check_md->phys_addr) | |
1087 | break; | |
1088 | contig_high = efi_md_end(check_md); | |
1089 | } | |
1090 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1091 | } | |
66888a6e | 1092 | if (!is_memory_available(md)) |
d8c97d5f TL |
1093 | continue; |
1094 | ||
1095 | /* | |
1096 | * Round ends inward to granule boundaries | |
1097 | * Give trimmings to uncached allocator | |
1098 | */ | |
1099 | if (md->phys_addr < contig_low) { | |
1100 | lim = min(efi_md_end(md), contig_low); | |
1101 | if (efi_uc(md)) { | |
7d9aed26 AG |
1102 | if (k > kern_memmap && |
1103 | (k-1)->attribute == EFI_MEMORY_UC && | |
d8c97d5f | 1104 | kmd_end(k-1) == md->phys_addr) { |
7d9aed26 AG |
1105 | (k-1)->num_pages += |
1106 | (lim - md->phys_addr) | |
1107 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1108 | } else { |
1109 | k->attribute = EFI_MEMORY_UC; | |
1110 | k->start = md->phys_addr; | |
7d9aed26 AG |
1111 | k->num_pages = (lim - md->phys_addr) |
1112 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1113 | k++; |
1114 | } | |
1115 | } | |
1116 | as = contig_low; | |
1117 | } else | |
1118 | as = md->phys_addr; | |
1119 | ||
1120 | if (efi_md_end(md) > contig_high) { | |
1121 | lim = max(md->phys_addr, contig_high); | |
1122 | if (efi_uc(md)) { | |
1123 | if (lim == md->phys_addr && k > kern_memmap && | |
1124 | (k-1)->attribute == EFI_MEMORY_UC && | |
1125 | kmd_end(k-1) == md->phys_addr) { | |
1126 | (k-1)->num_pages += md->num_pages; | |
1127 | } else { | |
1128 | k->attribute = EFI_MEMORY_UC; | |
1129 | k->start = lim; | |
7d9aed26 AG |
1130 | k->num_pages = (efi_md_end(md) - lim) |
1131 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1132 | k++; |
1133 | } | |
1134 | } | |
1135 | ae = contig_high; | |
1136 | } else | |
1137 | ae = efi_md_end(md); | |
1138 | ||
a7956113 ZN |
1139 | /* keep within max_addr= and min_addr= command line arg */ |
1140 | as = max(as, min_addr); | |
d8c97d5f TL |
1141 | ae = min(ae, max_addr); |
1142 | if (ae <= as) | |
1143 | continue; | |
1144 | ||
1145 | /* avoid going over mem= command line arg */ | |
1146 | if (total_mem + (ae - as) > mem_limit) | |
1147 | ae -= total_mem + (ae - as) - mem_limit; | |
1148 | ||
1149 | if (ae <= as) | |
1150 | continue; | |
1151 | if (prev && kmd_end(prev) == md->phys_addr) { | |
1152 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; | |
1153 | total_mem += ae - as; | |
1154 | continue; | |
1155 | } | |
1156 | k->attribute = EFI_MEMORY_WB; | |
1157 | k->start = as; | |
1158 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; | |
1159 | total_mem += ae - as; | |
1160 | prev = k++; | |
1161 | } | |
1162 | k->start = ~0L; /* end-marker */ | |
1163 | ||
1164 | /* reserve the memory we are using for kern_memmap */ | |
1165 | *s = (u64)kern_memmap; | |
1166 | *e = (u64)++k; | |
cb380853 BW |
1167 | |
1168 | return total_mem; | |
d8c97d5f | 1169 | } |
be379124 KA |
1170 | |
1171 | void | |
1172 | efi_initialize_iomem_resources(struct resource *code_resource, | |
00bf4098 BW |
1173 | struct resource *data_resource, |
1174 | struct resource *bss_resource) | |
be379124 KA |
1175 | { |
1176 | struct resource *res; | |
1177 | void *efi_map_start, *efi_map_end, *p; | |
1178 | efi_memory_desc_t *md; | |
1179 | u64 efi_desc_size; | |
1180 | char *name; | |
03cb525e | 1181 | unsigned long flags, desc; |
be379124 KA |
1182 | |
1183 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1184 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1185 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1186 | ||
1187 | res = NULL; | |
1188 | ||
1189 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1190 | md = p; | |
1191 | ||
1192 | if (md->num_pages == 0) /* should not happen */ | |
1193 | continue; | |
1194 | ||
887c3cb1 | 1195 | flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
03cb525e TK |
1196 | desc = IORES_DESC_NONE; |
1197 | ||
be379124 KA |
1198 | switch (md->type) { |
1199 | ||
1200 | case EFI_MEMORY_MAPPED_IO: | |
1201 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1202 | continue; | |
1203 | ||
1204 | case EFI_LOADER_CODE: | |
1205 | case EFI_LOADER_DATA: | |
1206 | case EFI_BOOT_SERVICES_DATA: | |
1207 | case EFI_BOOT_SERVICES_CODE: | |
1208 | case EFI_CONVENTIONAL_MEMORY: | |
1209 | if (md->attribute & EFI_MEMORY_WP) { | |
1210 | name = "System ROM"; | |
1211 | flags |= IORESOURCE_READONLY; | |
03cb525e | 1212 | } else if (md->attribute == EFI_MEMORY_UC) { |
d3758f87 | 1213 | name = "Uncached RAM"; |
03cb525e | 1214 | } else { |
be379124 | 1215 | name = "System RAM"; |
03cb525e TK |
1216 | flags |= IORESOURCE_SYSRAM; |
1217 | } | |
be379124 KA |
1218 | break; |
1219 | ||
1220 | case EFI_ACPI_MEMORY_NVS: | |
1221 | name = "ACPI Non-volatile Storage"; | |
03cb525e | 1222 | desc = IORES_DESC_ACPI_NV_STORAGE; |
be379124 KA |
1223 | break; |
1224 | ||
1225 | case EFI_UNUSABLE_MEMORY: | |
1226 | name = "reserved"; | |
887c3cb1 | 1227 | flags |= IORESOURCE_DISABLED; |
be379124 KA |
1228 | break; |
1229 | ||
ad5fb870 DW |
1230 | case EFI_PERSISTENT_MEMORY: |
1231 | name = "Persistent Memory"; | |
03cb525e | 1232 | desc = IORES_DESC_PERSISTENT_MEMORY; |
ad5fb870 DW |
1233 | break; |
1234 | ||
be379124 KA |
1235 | case EFI_RESERVED_TYPE: |
1236 | case EFI_RUNTIME_SERVICES_CODE: | |
1237 | case EFI_RUNTIME_SERVICES_DATA: | |
1238 | case EFI_ACPI_RECLAIM_MEMORY: | |
1239 | default: | |
1240 | name = "reserved"; | |
be379124 KA |
1241 | break; |
1242 | } | |
1243 | ||
7d9aed26 AG |
1244 | if ((res = kzalloc(sizeof(struct resource), |
1245 | GFP_KERNEL)) == NULL) { | |
1246 | printk(KERN_ERR | |
965e7c8a | 1247 | "failed to allocate resource for iomem\n"); |
be379124 KA |
1248 | return; |
1249 | } | |
1250 | ||
1251 | res->name = name; | |
1252 | res->start = md->phys_addr; | |
685c7f5d | 1253 | res->end = md->phys_addr + efi_md_size(md) - 1; |
be379124 | 1254 | res->flags = flags; |
03cb525e | 1255 | res->desc = desc; |
be379124 KA |
1256 | |
1257 | if (insert_resource(&iomem_resource, res) < 0) | |
1258 | kfree(res); | |
1259 | else { | |
1260 | /* | |
1261 | * We don't know which region contains | |
1262 | * kernel data so we try it repeatedly and | |
1263 | * let the resource manager test it. | |
1264 | */ | |
1265 | insert_resource(res, code_resource); | |
1266 | insert_resource(res, data_resource); | |
00bf4098 | 1267 | insert_resource(res, bss_resource); |
a7956113 ZN |
1268 | #ifdef CONFIG_KEXEC |
1269 | insert_resource(res, &efi_memmap_res); | |
1270 | insert_resource(res, &boot_param_res); | |
1271 | if (crashk_res.end > crashk_res.start) | |
1272 | insert_resource(res, &crashk_res); | |
1273 | #endif | |
be379124 KA |
1274 | } |
1275 | } | |
1276 | } | |
a7956113 ZN |
1277 | |
1278 | #ifdef CONFIG_KEXEC | |
1279 | /* find a block of memory aligned to 64M exclude reserved regions | |
1280 | rsvd_regions are sorted | |
1281 | */ | |
2a3a2827 | 1282 | unsigned long __init |
7d9aed26 | 1283 | kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n) |
a7956113 | 1284 | { |
7d9aed26 AG |
1285 | int i; |
1286 | u64 start, end; | |
1287 | u64 alignment = 1UL << _PAGE_SIZE_64M; | |
1288 | void *efi_map_start, *efi_map_end, *p; | |
1289 | efi_memory_desc_t *md; | |
1290 | u64 efi_desc_size; | |
1291 | ||
1292 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1293 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1294 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1295 | ||
1296 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1297 | md = p; | |
1298 | if (!efi_wb(md)) | |
1299 | continue; | |
1300 | start = ALIGN(md->phys_addr, alignment); | |
1301 | end = efi_md_end(md); | |
1302 | for (i = 0; i < n; i++) { | |
1303 | if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { | |
1304 | if (__pa(r[i].start) > start + size) | |
1305 | return start; | |
1306 | start = ALIGN(__pa(r[i].end), alignment); | |
1307 | if (i < n-1 && | |
1308 | __pa(r[i+1].start) < start + size) | |
1309 | continue; | |
1310 | else | |
1311 | break; | |
1312 | } | |
a7956113 | 1313 | } |
7d9aed26 AG |
1314 | if (end > start + size) |
1315 | return start; | |
1316 | } | |
1317 | ||
1318 | printk(KERN_WARNING | |
1319 | "Cannot reserve 0x%lx byte of memory for crashdump\n", size); | |
1320 | return ~0UL; | |
a7956113 ZN |
1321 | } |
1322 | #endif | |
cee87af2 | 1323 | |
d9a9855d | 1324 | #ifdef CONFIG_CRASH_DUMP |
cee87af2 | 1325 | /* locate the size find a the descriptor at a certain address */ |
1775fe85 | 1326 | unsigned long __init |
cee87af2 MD |
1327 | vmcore_find_descriptor_size (unsigned long address) |
1328 | { | |
1329 | void *efi_map_start, *efi_map_end, *p; | |
1330 | efi_memory_desc_t *md; | |
1331 | u64 efi_desc_size; | |
1332 | unsigned long ret = 0; | |
1333 | ||
1334 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1335 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1336 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1337 | ||
1338 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1339 | md = p; | |
1340 | if (efi_wb(md) && md->type == EFI_LOADER_DATA | |
1341 | && md->phys_addr == address) { | |
1342 | ret = efi_md_size(md); | |
1343 | break; | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | if (ret == 0) | |
1348 | printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); | |
1349 | ||
1350 | return ret; | |
1351 | } | |
1352 | #endif |