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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Extensible Firmware Interface | |
4 | * | |
7d9aed26 AG |
5 | * Based on Extensible Firmware Interface Specification version 0.9 |
6 | * April 30, 1999 | |
1da177e4 LT |
7 | * |
8 | * Copyright (C) 1999 VA Linux Systems | |
9 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
10 | * Copyright (C) 1999-2003 Hewlett-Packard Co. | |
11 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
12 | * Stephane Eranian <eranian@hpl.hp.com> | |
32e62c63 BH |
13 | * (c) Copyright 2006 Hewlett-Packard Development Company, L.P. |
14 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
15 | * |
16 | * All EFI Runtime Services are not implemented yet as EFI only | |
17 | * supports physical mode addressing on SoftSDV. This is to be fixed | |
18 | * in a future version. --drummond 1999-07-20 | |
19 | * | |
20 | * Implemented EFI runtime services and virtual mode calls. --davidm | |
21 | * | |
22 | * Goutham Rao: <goutham.rao@intel.com> | |
23 | * Skip non-WB memory and ignore empty memory ranges. | |
24 | */ | |
1da177e4 | 25 | #include <linux/module.h> |
57c8a661 | 26 | #include <linux/memblock.h> |
93a72052 | 27 | #include <linux/crash_dump.h> |
1da177e4 LT |
28 | #include <linux/kernel.h> |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
1da177e4 LT |
32 | #include <linux/time.h> |
33 | #include <linux/efi.h> | |
a7956113 | 34 | #include <linux/kexec.h> |
ed7ed365 | 35 | #include <linux/mm.h> |
1da177e4 LT |
36 | |
37 | #include <asm/io.h> | |
38 | #include <asm/kregs.h> | |
39 | #include <asm/meminit.h> | |
40 | #include <asm/pgtable.h> | |
41 | #include <asm/processor.h> | |
42 | #include <asm/mca.h> | |
c140d879 | 43 | #include <asm/setup.h> |
2046b94e | 44 | #include <asm/tlbflush.h> |
1da177e4 LT |
45 | |
46 | #define EFI_DEBUG 0 | |
47 | ||
272686bf LL |
48 | static __initdata unsigned long palo_phys; |
49 | ||
50 | static __initdata efi_config_table_type_t arch_tables[] = { | |
51 | {PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID, "PALO", &palo_phys}, | |
52 | {NULL_GUID, NULL, 0}, | |
53 | }; | |
54 | ||
1da177e4 LT |
55 | extern efi_status_t efi_call_phys (void *, ...); |
56 | ||
1da177e4 | 57 | static efi_runtime_services_t *runtime; |
e088a4ad | 58 | static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL; |
1da177e4 LT |
59 | |
60 | #define efi_call_virt(f, args...) (*(f))(args) | |
61 | ||
7d9aed26 AG |
62 | #define STUB_GET_TIME(prefix, adjust_arg) \ |
63 | static efi_status_t \ | |
64 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ | |
65 | { \ | |
66 | struct ia64_fpreg fr[6]; \ | |
67 | efi_time_cap_t *atc = NULL; \ | |
68 | efi_status_t ret; \ | |
69 | \ | |
70 | if (tc) \ | |
71 | atc = adjust_arg(tc); \ | |
72 | ia64_save_scratch_fpregs(fr); \ | |
73 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \ | |
74 | adjust_arg(tm), atc); \ | |
75 | ia64_load_scratch_fpregs(fr); \ | |
76 | return ret; \ | |
1da177e4 LT |
77 | } |
78 | ||
7d9aed26 AG |
79 | #define STUB_SET_TIME(prefix, adjust_arg) \ |
80 | static efi_status_t \ | |
81 | prefix##_set_time (efi_time_t *tm) \ | |
82 | { \ | |
83 | struct ia64_fpreg fr[6]; \ | |
84 | efi_status_t ret; \ | |
85 | \ | |
86 | ia64_save_scratch_fpregs(fr); \ | |
87 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \ | |
88 | adjust_arg(tm)); \ | |
89 | ia64_load_scratch_fpregs(fr); \ | |
90 | return ret; \ | |
1da177e4 LT |
91 | } |
92 | ||
7d9aed26 AG |
93 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ |
94 | static efi_status_t \ | |
95 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \ | |
96 | efi_time_t *tm) \ | |
97 | { \ | |
98 | struct ia64_fpreg fr[6]; \ | |
99 | efi_status_t ret; \ | |
100 | \ | |
101 | ia64_save_scratch_fpregs(fr); \ | |
102 | ret = efi_call_##prefix( \ | |
103 | (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ | |
104 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ | |
105 | ia64_load_scratch_fpregs(fr); \ | |
106 | return ret; \ | |
1da177e4 LT |
107 | } |
108 | ||
7d9aed26 AG |
109 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ |
110 | static efi_status_t \ | |
111 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ | |
112 | { \ | |
113 | struct ia64_fpreg fr[6]; \ | |
114 | efi_time_t *atm = NULL; \ | |
115 | efi_status_t ret; \ | |
116 | \ | |
117 | if (tm) \ | |
118 | atm = adjust_arg(tm); \ | |
119 | ia64_save_scratch_fpregs(fr); \ | |
120 | ret = efi_call_##prefix( \ | |
121 | (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ | |
122 | enabled, atm); \ | |
123 | ia64_load_scratch_fpregs(fr); \ | |
124 | return ret; \ | |
1da177e4 LT |
125 | } |
126 | ||
7d9aed26 AG |
127 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ |
128 | static efi_status_t \ | |
129 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ | |
130 | unsigned long *data_size, void *data) \ | |
131 | { \ | |
132 | struct ia64_fpreg fr[6]; \ | |
133 | u32 *aattr = NULL; \ | |
134 | efi_status_t ret; \ | |
135 | \ | |
136 | if (attr) \ | |
137 | aattr = adjust_arg(attr); \ | |
138 | ia64_save_scratch_fpregs(fr); \ | |
139 | ret = efi_call_##prefix( \ | |
140 | (efi_get_variable_t *) __va(runtime->get_variable), \ | |
141 | adjust_arg(name), adjust_arg(vendor), aattr, \ | |
142 | adjust_arg(data_size), adjust_arg(data)); \ | |
143 | ia64_load_scratch_fpregs(fr); \ | |
144 | return ret; \ | |
1da177e4 LT |
145 | } |
146 | ||
7d9aed26 AG |
147 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ |
148 | static efi_status_t \ | |
149 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \ | |
150 | efi_guid_t *vendor) \ | |
151 | { \ | |
152 | struct ia64_fpreg fr[6]; \ | |
153 | efi_status_t ret; \ | |
154 | \ | |
155 | ia64_save_scratch_fpregs(fr); \ | |
156 | ret = efi_call_##prefix( \ | |
157 | (efi_get_next_variable_t *) __va(runtime->get_next_variable), \ | |
158 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ | |
159 | ia64_load_scratch_fpregs(fr); \ | |
160 | return ret; \ | |
1da177e4 LT |
161 | } |
162 | ||
7d9aed26 AG |
163 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ |
164 | static efi_status_t \ | |
165 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \ | |
1eb9a4b8 | 166 | u32 attr, unsigned long data_size, \ |
7d9aed26 AG |
167 | void *data) \ |
168 | { \ | |
169 | struct ia64_fpreg fr[6]; \ | |
170 | efi_status_t ret; \ | |
171 | \ | |
172 | ia64_save_scratch_fpregs(fr); \ | |
173 | ret = efi_call_##prefix( \ | |
174 | (efi_set_variable_t *) __va(runtime->set_variable), \ | |
175 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ | |
176 | adjust_arg(data)); \ | |
177 | ia64_load_scratch_fpregs(fr); \ | |
178 | return ret; \ | |
1da177e4 LT |
179 | } |
180 | ||
7d9aed26 AG |
181 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ |
182 | static efi_status_t \ | |
183 | prefix##_get_next_high_mono_count (u32 *count) \ | |
184 | { \ | |
185 | struct ia64_fpreg fr[6]; \ | |
186 | efi_status_t ret; \ | |
187 | \ | |
188 | ia64_save_scratch_fpregs(fr); \ | |
189 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ | |
190 | __va(runtime->get_next_high_mono_count), \ | |
191 | adjust_arg(count)); \ | |
192 | ia64_load_scratch_fpregs(fr); \ | |
193 | return ret; \ | |
1da177e4 LT |
194 | } |
195 | ||
7d9aed26 AG |
196 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ |
197 | static void \ | |
198 | prefix##_reset_system (int reset_type, efi_status_t status, \ | |
199 | unsigned long data_size, efi_char16_t *data) \ | |
200 | { \ | |
201 | struct ia64_fpreg fr[6]; \ | |
202 | efi_char16_t *adata = NULL; \ | |
203 | \ | |
204 | if (data) \ | |
205 | adata = adjust_arg(data); \ | |
206 | \ | |
207 | ia64_save_scratch_fpregs(fr); \ | |
208 | efi_call_##prefix( \ | |
209 | (efi_reset_system_t *) __va(runtime->reset_system), \ | |
210 | reset_type, status, data_size, adata); \ | |
211 | /* should not return, but just in case... */ \ | |
212 | ia64_load_scratch_fpregs(fr); \ | |
1da177e4 LT |
213 | } |
214 | ||
215 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) | |
216 | ||
217 | STUB_GET_TIME(phys, phys_ptr) | |
218 | STUB_SET_TIME(phys, phys_ptr) | |
219 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) | |
220 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) | |
221 | STUB_GET_VARIABLE(phys, phys_ptr) | |
222 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) | |
223 | STUB_SET_VARIABLE(phys, phys_ptr) | |
224 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) | |
225 | STUB_RESET_SYSTEM(phys, phys_ptr) | |
226 | ||
227 | #define id(arg) arg | |
228 | ||
229 | STUB_GET_TIME(virt, id) | |
230 | STUB_SET_TIME(virt, id) | |
231 | STUB_GET_WAKEUP_TIME(virt, id) | |
232 | STUB_SET_WAKEUP_TIME(virt, id) | |
233 | STUB_GET_VARIABLE(virt, id) | |
234 | STUB_GET_NEXT_VARIABLE(virt, id) | |
235 | STUB_SET_VARIABLE(virt, id) | |
236 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) | |
237 | STUB_RESET_SYSTEM(virt, id) | |
238 | ||
239 | void | |
70f4f935 | 240 | efi_gettimeofday (struct timespec64 *ts) |
1da177e4 LT |
241 | { |
242 | efi_time_t tm; | |
243 | ||
4b07ae9b LZ |
244 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) { |
245 | memset(ts, 0, sizeof(*ts)); | |
1da177e4 | 246 | return; |
4b07ae9b | 247 | } |
1da177e4 | 248 | |
70f4f935 | 249 | ts->tv_sec = mktime64(tm.year, tm.month, tm.day, |
7d9aed26 | 250 | tm.hour, tm.minute, tm.second); |
1da177e4 LT |
251 | ts->tv_nsec = tm.nanosecond; |
252 | } | |
253 | ||
254 | static int | |
66888a6e | 255 | is_memory_available (efi_memory_desc_t *md) |
1da177e4 LT |
256 | { |
257 | if (!(md->attribute & EFI_MEMORY_WB)) | |
258 | return 0; | |
259 | ||
260 | switch (md->type) { | |
261 | case EFI_LOADER_CODE: | |
262 | case EFI_LOADER_DATA: | |
263 | case EFI_BOOT_SERVICES_CODE: | |
264 | case EFI_BOOT_SERVICES_DATA: | |
265 | case EFI_CONVENTIONAL_MEMORY: | |
266 | return 1; | |
267 | } | |
268 | return 0; | |
269 | } | |
270 | ||
d8c97d5f TL |
271 | typedef struct kern_memdesc { |
272 | u64 attribute; | |
273 | u64 start; | |
274 | u64 num_pages; | |
275 | } kern_memdesc_t; | |
1da177e4 | 276 | |
d8c97d5f | 277 | static kern_memdesc_t *kern_memmap; |
1da177e4 | 278 | |
80851ef2 BH |
279 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
280 | ||
281 | static inline u64 | |
282 | kmd_end(kern_memdesc_t *kmd) | |
283 | { | |
284 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); | |
285 | } | |
286 | ||
287 | static inline u64 | |
288 | efi_md_end(efi_memory_desc_t *md) | |
289 | { | |
290 | return (md->phys_addr + efi_md_size(md)); | |
291 | } | |
292 | ||
293 | static inline int | |
294 | efi_wb(efi_memory_desc_t *md) | |
295 | { | |
296 | return (md->attribute & EFI_MEMORY_WB); | |
297 | } | |
298 | ||
299 | static inline int | |
300 | efi_uc(efi_memory_desc_t *md) | |
301 | { | |
302 | return (md->attribute & EFI_MEMORY_UC); | |
303 | } | |
304 | ||
1da177e4 | 305 | static void |
d8c97d5f | 306 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
1da177e4 | 307 | { |
d8c97d5f TL |
308 | kern_memdesc_t *k; |
309 | u64 start, end, voff; | |
1da177e4 | 310 | |
d8c97d5f TL |
311 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
312 | for (k = kern_memmap; k->start != ~0UL; k++) { | |
313 | if (k->attribute != attr) | |
314 | continue; | |
315 | start = PAGE_ALIGN(k->start); | |
316 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; | |
317 | if (start < end) | |
318 | if ((*callback)(start + voff, end + voff, arg) < 0) | |
319 | return; | |
320 | } | |
1da177e4 LT |
321 | } |
322 | ||
323 | /* | |
965e7c8a | 324 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 325 | * descriptor that has memory that is available for OS use. |
1da177e4 LT |
326 | */ |
327 | void | |
328 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) | |
329 | { | |
d8c97d5f | 330 | walk(callback, arg, EFI_MEMORY_WB); |
1da177e4 LT |
331 | } |
332 | ||
f14f75b8 | 333 | /* |
965e7c8a | 334 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 335 | * descriptor that has memory that is available for uncached allocator. |
f14f75b8 | 336 | */ |
d8c97d5f TL |
337 | void |
338 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) | |
f14f75b8 | 339 | { |
d8c97d5f | 340 | walk(callback, arg, EFI_MEMORY_UC); |
f14f75b8 JS |
341 | } |
342 | ||
1da177e4 | 343 | /* |
965e7c8a | 344 | * Look for the PAL_CODE region reported by EFI and map it using an |
1da177e4 LT |
345 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor |
346 | * Abstraction Layer chapter 11 in ADAG | |
347 | */ | |
1da177e4 LT |
348 | void * |
349 | efi_get_pal_addr (void) | |
350 | { | |
351 | void *efi_map_start, *efi_map_end, *p; | |
352 | efi_memory_desc_t *md; | |
353 | u64 efi_desc_size; | |
354 | int pal_code_count = 0; | |
355 | u64 vaddr, mask; | |
356 | ||
357 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
358 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
359 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
360 | ||
361 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
362 | md = p; | |
363 | if (md->type != EFI_PAL_CODE) | |
364 | continue; | |
365 | ||
366 | if (++pal_code_count > 1) { | |
7d9aed26 | 367 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, " |
e088a4ad | 368 | "dropped @ %llx\n", md->phys_addr); |
1da177e4 LT |
369 | continue; |
370 | } | |
371 | /* | |
7d9aed26 AG |
372 | * The only ITLB entry in region 7 that is used is the one |
373 | * installed by __start(). That entry covers a 64MB range. | |
1da177e4 LT |
374 | */ |
375 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); | |
376 | vaddr = PAGE_OFFSET + md->phys_addr; | |
377 | ||
378 | /* | |
7d9aed26 AG |
379 | * We must check that the PAL mapping won't overlap with the |
380 | * kernel mapping. | |
1da177e4 | 381 | * |
7d9aed26 AG |
382 | * PAL code is guaranteed to be aligned on a power of 2 between |
383 | * 4k and 256KB and that only one ITR is needed to map it. This | |
384 | * implies that the PAL code is always aligned on its size, | |
385 | * i.e., the closest matching page size supported by the TLB. | |
386 | * Therefore PAL code is guaranteed never to cross a 64MB unless | |
387 | * it is bigger than 64MB (very unlikely!). So for now the | |
388 | * following test is enough to determine whether or not we need | |
389 | * a dedicated ITR for the PAL code. | |
1da177e4 LT |
390 | */ |
391 | if ((vaddr & mask) == (KERNEL_START & mask)) { | |
d4ed8084 HH |
392 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", |
393 | __func__); | |
1da177e4 LT |
394 | continue; |
395 | } | |
396 | ||
685c7f5d | 397 | if (efi_md_size(md) > IA64_GRANULE_SIZE) |
965e7c8a | 398 | panic("Whoa! PAL code size bigger than a granule!"); |
1da177e4 LT |
399 | |
400 | #if EFI_DEBUG | |
401 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); | |
402 | ||
7d9aed26 AG |
403 | printk(KERN_INFO "CPU %d: mapping PAL code " |
404 | "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n", | |
405 | smp_processor_id(), md->phys_addr, | |
406 | md->phys_addr + efi_md_size(md), | |
407 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); | |
1da177e4 LT |
408 | #endif |
409 | return __va(md->phys_addr); | |
410 | } | |
9473252f | 411 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n", |
d4ed8084 | 412 | __func__); |
1da177e4 LT |
413 | return NULL; |
414 | } | |
415 | ||
2046b94e FY |
416 | |
417 | static u8 __init palo_checksum(u8 *buffer, u32 length) | |
418 | { | |
419 | u8 sum = 0; | |
420 | u8 *end = buffer + length; | |
421 | ||
422 | while (buffer < end) | |
423 | sum = (u8) (sum + *(buffer++)); | |
424 | ||
425 | return sum; | |
426 | } | |
427 | ||
428 | /* | |
429 | * Parse and handle PALO table which is published at: | |
430 | * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf | |
431 | */ | |
272686bf | 432 | static void __init handle_palo(unsigned long phys_addr) |
2046b94e | 433 | { |
272686bf | 434 | struct palo_table *palo = __va(phys_addr); |
2046b94e FY |
435 | u8 checksum; |
436 | ||
437 | if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) { | |
438 | printk(KERN_INFO "PALO signature incorrect.\n"); | |
439 | return; | |
440 | } | |
441 | ||
442 | checksum = palo_checksum((u8 *)palo, palo->length); | |
443 | if (checksum) { | |
444 | printk(KERN_INFO "PALO checksum incorrect.\n"); | |
445 | return; | |
446 | } | |
447 | ||
a6c75b86 | 448 | setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO); |
2046b94e FY |
449 | } |
450 | ||
1da177e4 LT |
451 | void |
452 | efi_map_pal_code (void) | |
453 | { | |
454 | void *pal_vaddr = efi_get_pal_addr (); | |
455 | u64 psr; | |
456 | ||
457 | if (!pal_vaddr) | |
458 | return; | |
459 | ||
460 | /* | |
461 | * Cannot write to CRx with PSR.ic=1 | |
462 | */ | |
463 | psr = ia64_clear_ic(); | |
7d9aed26 AG |
464 | ia64_itr(0x1, IA64_TR_PALCODE, |
465 | GRANULEROUNDDOWN((unsigned long) pal_vaddr), | |
1da177e4 LT |
466 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), |
467 | IA64_GRANULE_SHIFT); | |
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 | |
2046b94e FY |
535 | palo_phys = EFI_INVALID_TABLE_ADDR; |
536 | ||
272686bf LL |
537 | if (efi_config_init(arch_tables) != 0) |
538 | return; | |
1da177e4 | 539 | |
2046b94e FY |
540 | if (palo_phys != EFI_INVALID_TABLE_ADDR) |
541 | handle_palo(palo_phys); | |
542 | ||
1da177e4 LT |
543 | runtime = __va(efi.systab->runtime); |
544 | efi.get_time = phys_get_time; | |
545 | efi.set_time = phys_set_time; | |
546 | efi.get_wakeup_time = phys_get_wakeup_time; | |
547 | efi.set_wakeup_time = phys_set_wakeup_time; | |
548 | efi.get_variable = phys_get_variable; | |
549 | efi.get_next_variable = phys_get_next_variable; | |
550 | efi.set_variable = phys_set_variable; | |
551 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; | |
552 | efi.reset_system = phys_reset_system; | |
553 | ||
554 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
555 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
556 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
557 | ||
558 | #if EFI_DEBUG | |
559 | /* print EFI memory map: */ | |
560 | { | |
561 | efi_memory_desc_t *md; | |
562 | void *p; | |
563 | ||
7d9aed26 AG |
564 | for (i = 0, p = efi_map_start; p < efi_map_end; |
565 | ++i, p += efi_desc_size) | |
566 | { | |
818c7e86 SH |
567 | const char *unit; |
568 | unsigned long size; | |
77b12bcf | 569 | char buf[64]; |
818c7e86 | 570 | |
1da177e4 | 571 | md = p; |
818c7e86 SH |
572 | size = md->num_pages << EFI_PAGE_SHIFT; |
573 | ||
574 | if ((size >> 40) > 0) { | |
575 | size >>= 40; | |
576 | unit = "TB"; | |
577 | } else if ((size >> 30) > 0) { | |
578 | size >>= 30; | |
579 | unit = "GB"; | |
580 | } else if ((size >> 20) > 0) { | |
581 | size >>= 20; | |
582 | unit = "MB"; | |
583 | } else { | |
584 | size >>= 10; | |
585 | unit = "KB"; | |
586 | } | |
587 | ||
77b12bcf | 588 | printk("mem%02d: %s " |
818c7e86 | 589 | "range=[0x%016lx-0x%016lx) (%4lu%s)\n", |
77b12bcf LE |
590 | i, efi_md_typeattr_format(buf, sizeof(buf), md), |
591 | 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 | ||
f99afd08 | 761 | int |
80851ef2 BH |
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; | |
f99afd08 | 768 | return -EINVAL; |
80851ef2 BH |
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 BH |
844 | } |
845 | ||
1da177e4 | 846 | int |
7e6735c3 | 847 | valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size) |
1da177e4 | 848 | { |
32e62c63 BH |
849 | u64 attr; |
850 | ||
851 | /* | |
852 | * /dev/mem reads and writes use copy_to_user(), which implicitly | |
853 | * uses a granule-sized kernel identity mapping. It's really | |
854 | * only safe to do this for regions in kern_memmap. For more | |
db9a0975 | 855 | * details, see Documentation/ia64/aliasing.rst. |
32e62c63 BH |
856 | */ |
857 | attr = kern_mem_attribute(phys_addr, size); | |
858 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) | |
859 | return 1; | |
860 | return 0; | |
80851ef2 | 861 | } |
1da177e4 | 862 | |
80851ef2 | 863 | int |
06c67bef | 864 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
80851ef2 | 865 | { |
6d40fc51 BH |
866 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
867 | u64 attr; | |
868 | ||
869 | attr = efi_mem_attribute(phys_addr, size); | |
870 | ||
32e62c63 | 871 | /* |
6d40fc51 BH |
872 | * /dev/mem mmap uses normal user pages, so we don't need the entire |
873 | * granule, but the entire region we're mapping must support the same | |
874 | * attribute. | |
32e62c63 | 875 | */ |
6d40fc51 BH |
876 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
877 | return 1; | |
878 | ||
879 | /* | |
880 | * Intel firmware doesn't tell us about all the MMIO regions, so | |
881 | * in general we have to allow mmap requests. But if EFI *does* | |
882 | * tell us about anything inside this region, we should deny it. | |
883 | * The user can always map a smaller region to avoid the overlap. | |
884 | */ | |
885 | if (efi_memmap_intersects(phys_addr, size)) | |
886 | return 0; | |
887 | ||
32e62c63 BH |
888 | return 1; |
889 | } | |
1da177e4 | 890 | |
32e62c63 BH |
891 | pgprot_t |
892 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, | |
893 | pgprot_t vma_prot) | |
894 | { | |
895 | unsigned long phys_addr = pfn << PAGE_SHIFT; | |
896 | u64 attr; | |
1da177e4 | 897 | |
32e62c63 BH |
898 | /* |
899 | * For /dev/mem mmap, we use user mappings, but if the region is | |
900 | * in kern_memmap (and hence may be covered by a kernel mapping), | |
901 | * we must use the same attribute as the kernel mapping. | |
902 | */ | |
903 | attr = kern_mem_attribute(phys_addr, size); | |
904 | if (attr & EFI_MEMORY_WB) | |
905 | return pgprot_cacheable(vma_prot); | |
906 | else if (attr & EFI_MEMORY_UC) | |
907 | return pgprot_noncached(vma_prot); | |
908 | ||
909 | /* | |
910 | * Some chipsets don't support UC access to memory. If | |
911 | * WB is supported, we prefer that. | |
912 | */ | |
913 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) | |
914 | return pgprot_cacheable(vma_prot); | |
915 | ||
916 | return pgprot_noncached(vma_prot); | |
1da177e4 LT |
917 | } |
918 | ||
919 | int __init | |
920 | efi_uart_console_only(void) | |
921 | { | |
922 | efi_status_t status; | |
923 | char *s, name[] = "ConOut"; | |
924 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; | |
925 | efi_char16_t *utf16, name_utf16[32]; | |
926 | unsigned char data[1024]; | |
927 | unsigned long size = sizeof(data); | |
928 | struct efi_generic_dev_path *hdr, *end_addr; | |
929 | int uart = 0; | |
930 | ||
931 | /* Convert to UTF-16 */ | |
932 | utf16 = name_utf16; | |
933 | s = name; | |
934 | while (*s) | |
935 | *utf16++ = *s++ & 0x7f; | |
936 | *utf16 = 0; | |
937 | ||
938 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); | |
939 | if (status != EFI_SUCCESS) { | |
940 | printk(KERN_ERR "No EFI %s variable?\n", name); | |
941 | return 0; | |
942 | } | |
943 | ||
944 | hdr = (struct efi_generic_dev_path *) data; | |
945 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); | |
946 | while (hdr < end_addr) { | |
947 | if (hdr->type == EFI_DEV_MSG && | |
948 | hdr->sub_type == EFI_DEV_MSG_UART) | |
949 | uart = 1; | |
950 | else if (hdr->type == EFI_DEV_END_PATH || | |
951 | hdr->type == EFI_DEV_END_PATH2) { | |
952 | if (!uart) | |
953 | return 0; | |
954 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) | |
955 | return 1; | |
956 | uart = 0; | |
957 | } | |
7d9aed26 | 958 | hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length); |
1da177e4 LT |
959 | } |
960 | printk(KERN_ERR "Malformed %s value\n", name); | |
961 | return 0; | |
962 | } | |
d8c97d5f | 963 | |
d8c97d5f TL |
964 | /* |
965 | * Look for the first granule aligned memory descriptor memory | |
966 | * that is big enough to hold EFI memory map. Make sure this | |
45b79a29 | 967 | * descriptor is at least granule sized so it does not get trimmed |
d8c97d5f TL |
968 | */ |
969 | struct kern_memdesc * | |
970 | find_memmap_space (void) | |
971 | { | |
972 | u64 contig_low=0, contig_high=0; | |
973 | u64 as = 0, ae; | |
974 | void *efi_map_start, *efi_map_end, *p, *q; | |
975 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
976 | u64 space_needed, efi_desc_size; | |
977 | unsigned long total_mem = 0; | |
978 | ||
979 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
980 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
981 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
982 | ||
983 | /* | |
984 | * Worst case: we need 3 kernel descriptors for each efi descriptor | |
985 | * (if every entry has a WB part in the middle, and UC head and tail), | |
986 | * plus one for the end marker. | |
987 | */ | |
988 | space_needed = sizeof(kern_memdesc_t) * | |
989 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); | |
990 | ||
991 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
992 | md = p; | |
993 | if (!efi_wb(md)) { | |
994 | continue; | |
995 | } | |
7d9aed26 AG |
996 | if (pmd == NULL || !efi_wb(pmd) || |
997 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
998 | contig_low = GRANULEROUNDUP(md->phys_addr); |
999 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1000 | for (q = p + efi_desc_size; q < efi_map_end; |
1001 | q += efi_desc_size) { | |
d8c97d5f TL |
1002 | check_md = q; |
1003 | if (!efi_wb(check_md)) | |
1004 | break; | |
1005 | if (contig_high != check_md->phys_addr) | |
1006 | break; | |
1007 | contig_high = efi_md_end(check_md); | |
1008 | } | |
1009 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1010 | } | |
66888a6e | 1011 | if (!is_memory_available(md) || md->type == EFI_LOADER_DATA) |
d8c97d5f TL |
1012 | continue; |
1013 | ||
1014 | /* Round ends inward to granule boundaries */ | |
1015 | as = max(contig_low, md->phys_addr); | |
1016 | ae = min(contig_high, efi_md_end(md)); | |
1017 | ||
a7956113 ZN |
1018 | /* keep within max_addr= and min_addr= command line arg */ |
1019 | as = max(as, min_addr); | |
d8c97d5f TL |
1020 | ae = min(ae, max_addr); |
1021 | if (ae <= as) | |
1022 | continue; | |
1023 | ||
1024 | /* avoid going over mem= command line arg */ | |
1025 | if (total_mem + (ae - as) > mem_limit) | |
1026 | ae -= total_mem + (ae - as) - mem_limit; | |
1027 | ||
1028 | if (ae <= as) | |
1029 | continue; | |
1030 | ||
1031 | if (ae - as > space_needed) | |
1032 | break; | |
1033 | } | |
1034 | if (p >= efi_map_end) | |
1035 | panic("Can't allocate space for kernel memory descriptors"); | |
1036 | ||
1037 | return __va(as); | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * Walk the EFI memory map and gather all memory available for kernel | |
1042 | * to use. We can allocate partial granules only if the unavailable | |
1043 | * parts exist, and are WB. | |
1044 | */ | |
cb380853 | 1045 | unsigned long |
e088a4ad | 1046 | efi_memmap_init(u64 *s, u64 *e) |
d8c97d5f | 1047 | { |
e037cda5 | 1048 | struct kern_memdesc *k, *prev = NULL; |
d8c97d5f TL |
1049 | u64 contig_low=0, contig_high=0; |
1050 | u64 as, ae, lim; | |
1051 | void *efi_map_start, *efi_map_end, *p, *q; | |
1052 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
1053 | u64 efi_desc_size; | |
1054 | unsigned long total_mem = 0; | |
1055 | ||
1056 | k = kern_memmap = find_memmap_space(); | |
1057 | ||
1058 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1059 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1060 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1061 | ||
1062 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
1063 | md = p; | |
1064 | if (!efi_wb(md)) { | |
7d9aed26 AG |
1065 | if (efi_uc(md) && |
1066 | (md->type == EFI_CONVENTIONAL_MEMORY || | |
1067 | md->type == EFI_BOOT_SERVICES_DATA)) { | |
d8c97d5f TL |
1068 | k->attribute = EFI_MEMORY_UC; |
1069 | k->start = md->phys_addr; | |
1070 | k->num_pages = md->num_pages; | |
1071 | k++; | |
1072 | } | |
1073 | continue; | |
1074 | } | |
7d9aed26 AG |
1075 | if (pmd == NULL || !efi_wb(pmd) || |
1076 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
1077 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1078 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1079 | for (q = p + efi_desc_size; q < efi_map_end; |
1080 | q += efi_desc_size) { | |
d8c97d5f TL |
1081 | check_md = q; |
1082 | if (!efi_wb(check_md)) | |
1083 | break; | |
1084 | if (contig_high != check_md->phys_addr) | |
1085 | break; | |
1086 | contig_high = efi_md_end(check_md); | |
1087 | } | |
1088 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1089 | } | |
66888a6e | 1090 | if (!is_memory_available(md)) |
d8c97d5f TL |
1091 | continue; |
1092 | ||
1093 | /* | |
1094 | * Round ends inward to granule boundaries | |
1095 | * Give trimmings to uncached allocator | |
1096 | */ | |
1097 | if (md->phys_addr < contig_low) { | |
1098 | lim = min(efi_md_end(md), contig_low); | |
1099 | if (efi_uc(md)) { | |
7d9aed26 AG |
1100 | if (k > kern_memmap && |
1101 | (k-1)->attribute == EFI_MEMORY_UC && | |
d8c97d5f | 1102 | kmd_end(k-1) == md->phys_addr) { |
7d9aed26 AG |
1103 | (k-1)->num_pages += |
1104 | (lim - md->phys_addr) | |
1105 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1106 | } else { |
1107 | k->attribute = EFI_MEMORY_UC; | |
1108 | k->start = md->phys_addr; | |
7d9aed26 AG |
1109 | k->num_pages = (lim - md->phys_addr) |
1110 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1111 | k++; |
1112 | } | |
1113 | } | |
1114 | as = contig_low; | |
1115 | } else | |
1116 | as = md->phys_addr; | |
1117 | ||
1118 | if (efi_md_end(md) > contig_high) { | |
1119 | lim = max(md->phys_addr, contig_high); | |
1120 | if (efi_uc(md)) { | |
1121 | if (lim == md->phys_addr && k > kern_memmap && | |
1122 | (k-1)->attribute == EFI_MEMORY_UC && | |
1123 | kmd_end(k-1) == md->phys_addr) { | |
1124 | (k-1)->num_pages += md->num_pages; | |
1125 | } else { | |
1126 | k->attribute = EFI_MEMORY_UC; | |
1127 | k->start = lim; | |
7d9aed26 AG |
1128 | k->num_pages = (efi_md_end(md) - lim) |
1129 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1130 | k++; |
1131 | } | |
1132 | } | |
1133 | ae = contig_high; | |
1134 | } else | |
1135 | ae = efi_md_end(md); | |
1136 | ||
a7956113 ZN |
1137 | /* keep within max_addr= and min_addr= command line arg */ |
1138 | as = max(as, min_addr); | |
d8c97d5f TL |
1139 | ae = min(ae, max_addr); |
1140 | if (ae <= as) | |
1141 | continue; | |
1142 | ||
1143 | /* avoid going over mem= command line arg */ | |
1144 | if (total_mem + (ae - as) > mem_limit) | |
1145 | ae -= total_mem + (ae - as) - mem_limit; | |
1146 | ||
1147 | if (ae <= as) | |
1148 | continue; | |
1149 | if (prev && kmd_end(prev) == md->phys_addr) { | |
1150 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; | |
1151 | total_mem += ae - as; | |
1152 | continue; | |
1153 | } | |
1154 | k->attribute = EFI_MEMORY_WB; | |
1155 | k->start = as; | |
1156 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; | |
1157 | total_mem += ae - as; | |
1158 | prev = k++; | |
1159 | } | |
1160 | k->start = ~0L; /* end-marker */ | |
1161 | ||
1162 | /* reserve the memory we are using for kern_memmap */ | |
1163 | *s = (u64)kern_memmap; | |
1164 | *e = (u64)++k; | |
cb380853 BW |
1165 | |
1166 | return total_mem; | |
d8c97d5f | 1167 | } |
be379124 KA |
1168 | |
1169 | void | |
1170 | efi_initialize_iomem_resources(struct resource *code_resource, | |
00bf4098 BW |
1171 | struct resource *data_resource, |
1172 | struct resource *bss_resource) | |
be379124 KA |
1173 | { |
1174 | struct resource *res; | |
1175 | void *efi_map_start, *efi_map_end, *p; | |
1176 | efi_memory_desc_t *md; | |
1177 | u64 efi_desc_size; | |
1178 | char *name; | |
03cb525e | 1179 | unsigned long flags, desc; |
be379124 KA |
1180 | |
1181 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1182 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1183 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1184 | ||
1185 | res = NULL; | |
1186 | ||
1187 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1188 | md = p; | |
1189 | ||
1190 | if (md->num_pages == 0) /* should not happen */ | |
1191 | continue; | |
1192 | ||
887c3cb1 | 1193 | flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
03cb525e TK |
1194 | desc = IORES_DESC_NONE; |
1195 | ||
be379124 KA |
1196 | switch (md->type) { |
1197 | ||
1198 | case EFI_MEMORY_MAPPED_IO: | |
1199 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1200 | continue; | |
1201 | ||
1202 | case EFI_LOADER_CODE: | |
1203 | case EFI_LOADER_DATA: | |
1204 | case EFI_BOOT_SERVICES_DATA: | |
1205 | case EFI_BOOT_SERVICES_CODE: | |
1206 | case EFI_CONVENTIONAL_MEMORY: | |
1207 | if (md->attribute & EFI_MEMORY_WP) { | |
1208 | name = "System ROM"; | |
1209 | flags |= IORESOURCE_READONLY; | |
03cb525e | 1210 | } else if (md->attribute == EFI_MEMORY_UC) { |
d3758f87 | 1211 | name = "Uncached RAM"; |
03cb525e | 1212 | } else { |
be379124 | 1213 | name = "System RAM"; |
03cb525e TK |
1214 | flags |= IORESOURCE_SYSRAM; |
1215 | } | |
be379124 KA |
1216 | break; |
1217 | ||
1218 | case EFI_ACPI_MEMORY_NVS: | |
1219 | name = "ACPI Non-volatile Storage"; | |
03cb525e | 1220 | desc = IORES_DESC_ACPI_NV_STORAGE; |
be379124 KA |
1221 | break; |
1222 | ||
1223 | case EFI_UNUSABLE_MEMORY: | |
1224 | name = "reserved"; | |
887c3cb1 | 1225 | flags |= IORESOURCE_DISABLED; |
be379124 KA |
1226 | break; |
1227 | ||
ad5fb870 DW |
1228 | case EFI_PERSISTENT_MEMORY: |
1229 | name = "Persistent Memory"; | |
03cb525e | 1230 | desc = IORES_DESC_PERSISTENT_MEMORY; |
ad5fb870 DW |
1231 | break; |
1232 | ||
be379124 KA |
1233 | case EFI_RESERVED_TYPE: |
1234 | case EFI_RUNTIME_SERVICES_CODE: | |
1235 | case EFI_RUNTIME_SERVICES_DATA: | |
1236 | case EFI_ACPI_RECLAIM_MEMORY: | |
1237 | default: | |
1238 | name = "reserved"; | |
be379124 KA |
1239 | break; |
1240 | } | |
1241 | ||
7d9aed26 AG |
1242 | if ((res = kzalloc(sizeof(struct resource), |
1243 | GFP_KERNEL)) == NULL) { | |
1244 | printk(KERN_ERR | |
965e7c8a | 1245 | "failed to allocate resource for iomem\n"); |
be379124 KA |
1246 | return; |
1247 | } | |
1248 | ||
1249 | res->name = name; | |
1250 | res->start = md->phys_addr; | |
685c7f5d | 1251 | res->end = md->phys_addr + efi_md_size(md) - 1; |
be379124 | 1252 | res->flags = flags; |
03cb525e | 1253 | res->desc = desc; |
be379124 KA |
1254 | |
1255 | if (insert_resource(&iomem_resource, res) < 0) | |
1256 | kfree(res); | |
1257 | else { | |
1258 | /* | |
1259 | * We don't know which region contains | |
1260 | * kernel data so we try it repeatedly and | |
1261 | * let the resource manager test it. | |
1262 | */ | |
1263 | insert_resource(res, code_resource); | |
1264 | insert_resource(res, data_resource); | |
00bf4098 | 1265 | insert_resource(res, bss_resource); |
a7956113 ZN |
1266 | #ifdef CONFIG_KEXEC |
1267 | insert_resource(res, &efi_memmap_res); | |
1268 | insert_resource(res, &boot_param_res); | |
1269 | if (crashk_res.end > crashk_res.start) | |
1270 | insert_resource(res, &crashk_res); | |
1271 | #endif | |
be379124 KA |
1272 | } |
1273 | } | |
1274 | } | |
a7956113 ZN |
1275 | |
1276 | #ifdef CONFIG_KEXEC | |
1277 | /* find a block of memory aligned to 64M exclude reserved regions | |
1278 | rsvd_regions are sorted | |
1279 | */ | |
2a3a2827 | 1280 | unsigned long __init |
7d9aed26 | 1281 | kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n) |
a7956113 | 1282 | { |
7d9aed26 AG |
1283 | int i; |
1284 | u64 start, end; | |
1285 | u64 alignment = 1UL << _PAGE_SIZE_64M; | |
1286 | void *efi_map_start, *efi_map_end, *p; | |
1287 | efi_memory_desc_t *md; | |
1288 | u64 efi_desc_size; | |
1289 | ||
1290 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1291 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1292 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1293 | ||
1294 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1295 | md = p; | |
1296 | if (!efi_wb(md)) | |
1297 | continue; | |
1298 | start = ALIGN(md->phys_addr, alignment); | |
1299 | end = efi_md_end(md); | |
1300 | for (i = 0; i < n; i++) { | |
1301 | if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { | |
1302 | if (__pa(r[i].start) > start + size) | |
1303 | return start; | |
1304 | start = ALIGN(__pa(r[i].end), alignment); | |
1305 | if (i < n-1 && | |
1306 | __pa(r[i+1].start) < start + size) | |
1307 | continue; | |
1308 | else | |
1309 | break; | |
1310 | } | |
a7956113 | 1311 | } |
7d9aed26 AG |
1312 | if (end > start + size) |
1313 | return start; | |
1314 | } | |
1315 | ||
1316 | printk(KERN_WARNING | |
1317 | "Cannot reserve 0x%lx byte of memory for crashdump\n", size); | |
1318 | return ~0UL; | |
a7956113 ZN |
1319 | } |
1320 | #endif | |
cee87af2 | 1321 | |
d9a9855d | 1322 | #ifdef CONFIG_CRASH_DUMP |
cee87af2 | 1323 | /* locate the size find a the descriptor at a certain address */ |
1775fe85 | 1324 | unsigned long __init |
cee87af2 MD |
1325 | vmcore_find_descriptor_size (unsigned long address) |
1326 | { | |
1327 | void *efi_map_start, *efi_map_end, *p; | |
1328 | efi_memory_desc_t *md; | |
1329 | u64 efi_desc_size; | |
1330 | unsigned long ret = 0; | |
1331 | ||
1332 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1333 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1334 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1335 | ||
1336 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1337 | md = p; | |
1338 | if (efi_wb(md) && md->type == EFI_LOADER_DATA | |
1339 | && md->phys_addr == address) { | |
1340 | ret = efi_md_size(md); | |
1341 | break; | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | if (ret == 0) | |
1346 | printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); | |
1347 | ||
1348 | return ret; | |
1349 | } | |
1350 | #endif |