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1da177e4 LT |
1 | /* |
2 | * Extensible Firmware Interface | |
3 | * | |
4 | * Based on Extensible Firmware Interface Specification version 0.9 April 30, 1999 | |
5 | * | |
6 | * Copyright (C) 1999 VA Linux Systems | |
7 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
8 | * Copyright (C) 1999-2003 Hewlett-Packard Co. | |
9 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
10 | * Stephane Eranian <eranian@hpl.hp.com> | |
11 | * | |
12 | * All EFI Runtime Services are not implemented yet as EFI only | |
13 | * supports physical mode addressing on SoftSDV. This is to be fixed | |
14 | * in a future version. --drummond 1999-07-20 | |
15 | * | |
16 | * Implemented EFI runtime services and virtual mode calls. --davidm | |
17 | * | |
18 | * Goutham Rao: <goutham.rao@intel.com> | |
19 | * Skip non-WB memory and ignore empty memory ranges. | |
20 | */ | |
21 | #include <linux/config.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/types.h> | |
26 | #include <linux/time.h> | |
27 | #include <linux/efi.h> | |
28 | ||
29 | #include <asm/io.h> | |
30 | #include <asm/kregs.h> | |
31 | #include <asm/meminit.h> | |
32 | #include <asm/pgtable.h> | |
33 | #include <asm/processor.h> | |
34 | #include <asm/mca.h> | |
35 | ||
36 | #define EFI_DEBUG 0 | |
37 | ||
38 | extern efi_status_t efi_call_phys (void *, ...); | |
39 | ||
40 | struct efi efi; | |
41 | EXPORT_SYMBOL(efi); | |
42 | static efi_runtime_services_t *runtime; | |
43 | static unsigned long mem_limit = ~0UL, max_addr = ~0UL; | |
44 | ||
45 | #define efi_call_virt(f, args...) (*(f))(args) | |
46 | ||
47 | #define STUB_GET_TIME(prefix, adjust_arg) \ | |
48 | static efi_status_t \ | |
49 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ | |
50 | { \ | |
51 | struct ia64_fpreg fr[6]; \ | |
52 | efi_time_cap_t *atc = NULL; \ | |
53 | efi_status_t ret; \ | |
54 | \ | |
55 | if (tc) \ | |
56 | atc = adjust_arg(tc); \ | |
57 | ia64_save_scratch_fpregs(fr); \ | |
58 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), adjust_arg(tm), atc); \ | |
59 | ia64_load_scratch_fpregs(fr); \ | |
60 | return ret; \ | |
61 | } | |
62 | ||
63 | #define STUB_SET_TIME(prefix, adjust_arg) \ | |
64 | static efi_status_t \ | |
65 | prefix##_set_time (efi_time_t *tm) \ | |
66 | { \ | |
67 | struct ia64_fpreg fr[6]; \ | |
68 | efi_status_t ret; \ | |
69 | \ | |
70 | ia64_save_scratch_fpregs(fr); \ | |
71 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), adjust_arg(tm)); \ | |
72 | ia64_load_scratch_fpregs(fr); \ | |
73 | return ret; \ | |
74 | } | |
75 | ||
76 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ | |
77 | static efi_status_t \ | |
78 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm) \ | |
79 | { \ | |
80 | struct ia64_fpreg fr[6]; \ | |
81 | efi_status_t ret; \ | |
82 | \ | |
83 | ia64_save_scratch_fpregs(fr); \ | |
84 | ret = efi_call_##prefix((efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ | |
85 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ | |
86 | ia64_load_scratch_fpregs(fr); \ | |
87 | return ret; \ | |
88 | } | |
89 | ||
90 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ | |
91 | static efi_status_t \ | |
92 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ | |
93 | { \ | |
94 | struct ia64_fpreg fr[6]; \ | |
95 | efi_time_t *atm = NULL; \ | |
96 | efi_status_t ret; \ | |
97 | \ | |
98 | if (tm) \ | |
99 | atm = adjust_arg(tm); \ | |
100 | ia64_save_scratch_fpregs(fr); \ | |
101 | ret = efi_call_##prefix((efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ | |
102 | enabled, atm); \ | |
103 | ia64_load_scratch_fpregs(fr); \ | |
104 | return ret; \ | |
105 | } | |
106 | ||
107 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ | |
108 | static efi_status_t \ | |
109 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ | |
110 | unsigned long *data_size, void *data) \ | |
111 | { \ | |
112 | struct ia64_fpreg fr[6]; \ | |
113 | u32 *aattr = NULL; \ | |
114 | efi_status_t ret; \ | |
115 | \ | |
116 | if (attr) \ | |
117 | aattr = adjust_arg(attr); \ | |
118 | ia64_save_scratch_fpregs(fr); \ | |
119 | ret = efi_call_##prefix((efi_get_variable_t *) __va(runtime->get_variable), \ | |
120 | adjust_arg(name), adjust_arg(vendor), aattr, \ | |
121 | adjust_arg(data_size), adjust_arg(data)); \ | |
122 | ia64_load_scratch_fpregs(fr); \ | |
123 | return ret; \ | |
124 | } | |
125 | ||
126 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ | |
127 | static efi_status_t \ | |
128 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor) \ | |
129 | { \ | |
130 | struct ia64_fpreg fr[6]; \ | |
131 | efi_status_t ret; \ | |
132 | \ | |
133 | ia64_save_scratch_fpregs(fr); \ | |
134 | ret = efi_call_##prefix((efi_get_next_variable_t *) __va(runtime->get_next_variable), \ | |
135 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ | |
136 | ia64_load_scratch_fpregs(fr); \ | |
137 | return ret; \ | |
138 | } | |
139 | ||
140 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ | |
141 | static efi_status_t \ | |
142 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, unsigned long attr, \ | |
143 | unsigned long data_size, void *data) \ | |
144 | { \ | |
145 | struct ia64_fpreg fr[6]; \ | |
146 | efi_status_t ret; \ | |
147 | \ | |
148 | ia64_save_scratch_fpregs(fr); \ | |
149 | ret = efi_call_##prefix((efi_set_variable_t *) __va(runtime->set_variable), \ | |
150 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ | |
151 | adjust_arg(data)); \ | |
152 | ia64_load_scratch_fpregs(fr); \ | |
153 | return ret; \ | |
154 | } | |
155 | ||
156 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ | |
157 | static efi_status_t \ | |
158 | prefix##_get_next_high_mono_count (u32 *count) \ | |
159 | { \ | |
160 | struct ia64_fpreg fr[6]; \ | |
161 | efi_status_t ret; \ | |
162 | \ | |
163 | ia64_save_scratch_fpregs(fr); \ | |
164 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ | |
165 | __va(runtime->get_next_high_mono_count), adjust_arg(count)); \ | |
166 | ia64_load_scratch_fpregs(fr); \ | |
167 | return ret; \ | |
168 | } | |
169 | ||
170 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ | |
171 | static void \ | |
172 | prefix##_reset_system (int reset_type, efi_status_t status, \ | |
173 | unsigned long data_size, efi_char16_t *data) \ | |
174 | { \ | |
175 | struct ia64_fpreg fr[6]; \ | |
176 | efi_char16_t *adata = NULL; \ | |
177 | \ | |
178 | if (data) \ | |
179 | adata = adjust_arg(data); \ | |
180 | \ | |
181 | ia64_save_scratch_fpregs(fr); \ | |
182 | efi_call_##prefix((efi_reset_system_t *) __va(runtime->reset_system), \ | |
183 | reset_type, status, data_size, adata); \ | |
184 | /* should not return, but just in case... */ \ | |
185 | ia64_load_scratch_fpregs(fr); \ | |
186 | } | |
187 | ||
188 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) | |
189 | ||
190 | STUB_GET_TIME(phys, phys_ptr) | |
191 | STUB_SET_TIME(phys, phys_ptr) | |
192 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) | |
193 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) | |
194 | STUB_GET_VARIABLE(phys, phys_ptr) | |
195 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) | |
196 | STUB_SET_VARIABLE(phys, phys_ptr) | |
197 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) | |
198 | STUB_RESET_SYSTEM(phys, phys_ptr) | |
199 | ||
200 | #define id(arg) arg | |
201 | ||
202 | STUB_GET_TIME(virt, id) | |
203 | STUB_SET_TIME(virt, id) | |
204 | STUB_GET_WAKEUP_TIME(virt, id) | |
205 | STUB_SET_WAKEUP_TIME(virt, id) | |
206 | STUB_GET_VARIABLE(virt, id) | |
207 | STUB_GET_NEXT_VARIABLE(virt, id) | |
208 | STUB_SET_VARIABLE(virt, id) | |
209 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) | |
210 | STUB_RESET_SYSTEM(virt, id) | |
211 | ||
212 | void | |
213 | efi_gettimeofday (struct timespec *ts) | |
214 | { | |
215 | efi_time_t tm; | |
216 | ||
217 | memset(ts, 0, sizeof(ts)); | |
218 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) | |
219 | return; | |
220 | ||
221 | ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second); | |
222 | ts->tv_nsec = tm.nanosecond; | |
223 | } | |
224 | ||
225 | static int | |
226 | is_available_memory (efi_memory_desc_t *md) | |
227 | { | |
228 | if (!(md->attribute & EFI_MEMORY_WB)) | |
229 | return 0; | |
230 | ||
231 | switch (md->type) { | |
232 | case EFI_LOADER_CODE: | |
233 | case EFI_LOADER_DATA: | |
234 | case EFI_BOOT_SERVICES_CODE: | |
235 | case EFI_BOOT_SERVICES_DATA: | |
236 | case EFI_CONVENTIONAL_MEMORY: | |
237 | return 1; | |
238 | } | |
239 | return 0; | |
240 | } | |
241 | ||
d8c97d5f TL |
242 | typedef struct kern_memdesc { |
243 | u64 attribute; | |
244 | u64 start; | |
245 | u64 num_pages; | |
246 | } kern_memdesc_t; | |
1da177e4 | 247 | |
d8c97d5f | 248 | static kern_memdesc_t *kern_memmap; |
1da177e4 | 249 | |
80851ef2 BH |
250 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
251 | ||
252 | static inline u64 | |
253 | kmd_end(kern_memdesc_t *kmd) | |
254 | { | |
255 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); | |
256 | } | |
257 | ||
258 | static inline u64 | |
259 | efi_md_end(efi_memory_desc_t *md) | |
260 | { | |
261 | return (md->phys_addr + efi_md_size(md)); | |
262 | } | |
263 | ||
264 | static inline int | |
265 | efi_wb(efi_memory_desc_t *md) | |
266 | { | |
267 | return (md->attribute & EFI_MEMORY_WB); | |
268 | } | |
269 | ||
270 | static inline int | |
271 | efi_uc(efi_memory_desc_t *md) | |
272 | { | |
273 | return (md->attribute & EFI_MEMORY_UC); | |
274 | } | |
275 | ||
1da177e4 | 276 | static void |
d8c97d5f | 277 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
1da177e4 | 278 | { |
d8c97d5f TL |
279 | kern_memdesc_t *k; |
280 | u64 start, end, voff; | |
1da177e4 | 281 | |
d8c97d5f TL |
282 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
283 | for (k = kern_memmap; k->start != ~0UL; k++) { | |
284 | if (k->attribute != attr) | |
285 | continue; | |
286 | start = PAGE_ALIGN(k->start); | |
287 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; | |
288 | if (start < end) | |
289 | if ((*callback)(start + voff, end + voff, arg) < 0) | |
290 | return; | |
291 | } | |
1da177e4 LT |
292 | } |
293 | ||
294 | /* | |
295 | * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that | |
296 | * has memory that is available for OS use. | |
297 | */ | |
298 | void | |
299 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) | |
300 | { | |
d8c97d5f | 301 | walk(callback, arg, EFI_MEMORY_WB); |
1da177e4 LT |
302 | } |
303 | ||
f14f75b8 | 304 | /* |
d8c97d5f TL |
305 | * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that |
306 | * has memory that is available for uncached allocator. | |
f14f75b8 | 307 | */ |
d8c97d5f TL |
308 | void |
309 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) | |
f14f75b8 | 310 | { |
d8c97d5f | 311 | walk(callback, arg, EFI_MEMORY_UC); |
f14f75b8 JS |
312 | } |
313 | ||
1da177e4 LT |
314 | /* |
315 | * Look for the PAL_CODE region reported by EFI and maps it using an | |
316 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor | |
317 | * Abstraction Layer chapter 11 in ADAG | |
318 | */ | |
319 | ||
320 | void * | |
321 | efi_get_pal_addr (void) | |
322 | { | |
323 | void *efi_map_start, *efi_map_end, *p; | |
324 | efi_memory_desc_t *md; | |
325 | u64 efi_desc_size; | |
326 | int pal_code_count = 0; | |
327 | u64 vaddr, mask; | |
328 | ||
329 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
330 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
331 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
332 | ||
333 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
334 | md = p; | |
335 | if (md->type != EFI_PAL_CODE) | |
336 | continue; | |
337 | ||
338 | if (++pal_code_count > 1) { | |
339 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, dropped @ %lx\n", | |
340 | md->phys_addr); | |
341 | continue; | |
342 | } | |
343 | /* | |
344 | * The only ITLB entry in region 7 that is used is the one installed by | |
345 | * __start(). That entry covers a 64MB range. | |
346 | */ | |
347 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); | |
348 | vaddr = PAGE_OFFSET + md->phys_addr; | |
349 | ||
350 | /* | |
351 | * We must check that the PAL mapping won't overlap with the kernel | |
352 | * mapping. | |
353 | * | |
354 | * PAL code is guaranteed to be aligned on a power of 2 between 4k and | |
355 | * 256KB and that only one ITR is needed to map it. This implies that the | |
356 | * PAL code is always aligned on its size, i.e., the closest matching page | |
357 | * size supported by the TLB. Therefore PAL code is guaranteed never to | |
358 | * cross a 64MB unless it is bigger than 64MB (very unlikely!). So for | |
359 | * now the following test is enough to determine whether or not we need a | |
360 | * dedicated ITR for the PAL code. | |
361 | */ | |
362 | if ((vaddr & mask) == (KERNEL_START & mask)) { | |
363 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", | |
364 | __FUNCTION__); | |
365 | continue; | |
366 | } | |
367 | ||
368 | if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE) | |
369 | panic("Woah! PAL code size bigger than a granule!"); | |
370 | ||
371 | #if EFI_DEBUG | |
372 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); | |
373 | ||
374 | printk(KERN_INFO "CPU %d: mapping PAL code [0x%lx-0x%lx) into [0x%lx-0x%lx)\n", | |
375 | smp_processor_id(), md->phys_addr, | |
376 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
377 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); | |
378 | #endif | |
379 | return __va(md->phys_addr); | |
380 | } | |
381 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found", | |
382 | __FUNCTION__); | |
383 | return NULL; | |
384 | } | |
385 | ||
386 | void | |
387 | efi_map_pal_code (void) | |
388 | { | |
389 | void *pal_vaddr = efi_get_pal_addr (); | |
390 | u64 psr; | |
391 | ||
392 | if (!pal_vaddr) | |
393 | return; | |
394 | ||
395 | /* | |
396 | * Cannot write to CRx with PSR.ic=1 | |
397 | */ | |
398 | psr = ia64_clear_ic(); | |
399 | ia64_itr(0x1, IA64_TR_PALCODE, GRANULEROUNDDOWN((unsigned long) pal_vaddr), | |
400 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), | |
401 | IA64_GRANULE_SHIFT); | |
402 | ia64_set_psr(psr); /* restore psr */ | |
403 | ia64_srlz_i(); | |
404 | } | |
405 | ||
406 | void __init | |
407 | efi_init (void) | |
408 | { | |
409 | void *efi_map_start, *efi_map_end; | |
410 | efi_config_table_t *config_tables; | |
411 | efi_char16_t *c16; | |
412 | u64 efi_desc_size; | |
9d78f43d | 413 | char *cp, vendor[100] = "unknown"; |
1da177e4 LT |
414 | extern char saved_command_line[]; |
415 | int i; | |
416 | ||
417 | /* it's too early to be able to use the standard kernel command line support... */ | |
418 | for (cp = saved_command_line; *cp; ) { | |
419 | if (memcmp(cp, "mem=", 4) == 0) { | |
9d78f43d | 420 | mem_limit = memparse(cp + 4, &cp); |
1da177e4 | 421 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
9d78f43d | 422 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
1da177e4 LT |
423 | } else { |
424 | while (*cp != ' ' && *cp) | |
425 | ++cp; | |
426 | while (*cp == ' ') | |
427 | ++cp; | |
428 | } | |
429 | } | |
430 | if (max_addr != ~0UL) | |
431 | printk(KERN_INFO "Ignoring memory above %luMB\n", max_addr >> 20); | |
432 | ||
433 | efi.systab = __va(ia64_boot_param->efi_systab); | |
434 | ||
435 | /* | |
436 | * Verify the EFI Table | |
437 | */ | |
438 | if (efi.systab == NULL) | |
439 | panic("Woah! Can't find EFI system table.\n"); | |
440 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) | |
441 | panic("Woah! EFI system table signature incorrect\n"); | |
442 | if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0) | |
443 | printk(KERN_WARNING "Warning: EFI system table major version mismatch: " | |
444 | "got %d.%02d, expected %d.%02d\n", | |
445 | efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, | |
446 | EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff); | |
447 | ||
448 | config_tables = __va(efi.systab->tables); | |
449 | ||
450 | /* Show what we know for posterity */ | |
451 | c16 = __va(efi.systab->fw_vendor); | |
452 | if (c16) { | |
ecdd5dab | 453 | for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i) |
1da177e4 LT |
454 | vendor[i] = *c16++; |
455 | vendor[i] = '\0'; | |
456 | } | |
457 | ||
458 | printk(KERN_INFO "EFI v%u.%.02u by %s:", | |
459 | efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor); | |
460 | ||
461 | for (i = 0; i < (int) efi.systab->nr_tables; i++) { | |
462 | if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) { | |
463 | efi.mps = __va(config_tables[i].table); | |
464 | printk(" MPS=0x%lx", config_tables[i].table); | |
465 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) { | |
466 | efi.acpi20 = __va(config_tables[i].table); | |
467 | printk(" ACPI 2.0=0x%lx", config_tables[i].table); | |
468 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) { | |
469 | efi.acpi = __va(config_tables[i].table); | |
470 | printk(" ACPI=0x%lx", config_tables[i].table); | |
471 | } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) { | |
472 | efi.smbios = __va(config_tables[i].table); | |
473 | printk(" SMBIOS=0x%lx", config_tables[i].table); | |
474 | } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) { | |
475 | efi.sal_systab = __va(config_tables[i].table); | |
476 | printk(" SALsystab=0x%lx", config_tables[i].table); | |
477 | } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) { | |
478 | efi.hcdp = __va(config_tables[i].table); | |
479 | printk(" HCDP=0x%lx", config_tables[i].table); | |
480 | } | |
481 | } | |
482 | printk("\n"); | |
483 | ||
484 | runtime = __va(efi.systab->runtime); | |
485 | efi.get_time = phys_get_time; | |
486 | efi.set_time = phys_set_time; | |
487 | efi.get_wakeup_time = phys_get_wakeup_time; | |
488 | efi.set_wakeup_time = phys_set_wakeup_time; | |
489 | efi.get_variable = phys_get_variable; | |
490 | efi.get_next_variable = phys_get_next_variable; | |
491 | efi.set_variable = phys_set_variable; | |
492 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; | |
493 | efi.reset_system = phys_reset_system; | |
494 | ||
495 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
496 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
497 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
498 | ||
499 | #if EFI_DEBUG | |
500 | /* print EFI memory map: */ | |
501 | { | |
502 | efi_memory_desc_t *md; | |
503 | void *p; | |
504 | ||
505 | for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) { | |
506 | md = p; | |
507 | printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n", | |
508 | i, md->type, md->attribute, md->phys_addr, | |
509 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
510 | md->num_pages >> (20 - EFI_PAGE_SHIFT)); | |
511 | } | |
512 | } | |
513 | #endif | |
514 | ||
515 | efi_map_pal_code(); | |
516 | efi_enter_virtual_mode(); | |
517 | } | |
518 | ||
519 | void | |
520 | efi_enter_virtual_mode (void) | |
521 | { | |
522 | void *efi_map_start, *efi_map_end, *p; | |
523 | efi_memory_desc_t *md; | |
524 | efi_status_t status; | |
525 | u64 efi_desc_size; | |
526 | ||
527 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
528 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
529 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
530 | ||
531 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
532 | md = p; | |
533 | if (md->attribute & EFI_MEMORY_RUNTIME) { | |
534 | /* | |
535 | * Some descriptors have multiple bits set, so the order of | |
536 | * the tests is relevant. | |
537 | */ | |
538 | if (md->attribute & EFI_MEMORY_WB) { | |
539 | md->virt_addr = (u64) __va(md->phys_addr); | |
540 | } else if (md->attribute & EFI_MEMORY_UC) { | |
541 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
542 | } else if (md->attribute & EFI_MEMORY_WC) { | |
543 | #if 0 | |
544 | md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P | |
545 | | _PAGE_D | |
546 | | _PAGE_MA_WC | |
547 | | _PAGE_PL_0 | |
548 | | _PAGE_AR_RW)); | |
549 | #else | |
550 | printk(KERN_INFO "EFI_MEMORY_WC mapping\n"); | |
551 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
552 | #endif | |
553 | } else if (md->attribute & EFI_MEMORY_WT) { | |
554 | #if 0 | |
555 | md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P | |
556 | | _PAGE_D | _PAGE_MA_WT | |
557 | | _PAGE_PL_0 | |
558 | | _PAGE_AR_RW)); | |
559 | #else | |
560 | printk(KERN_INFO "EFI_MEMORY_WT mapping\n"); | |
561 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
562 | #endif | |
563 | } | |
564 | } | |
565 | } | |
566 | ||
567 | status = efi_call_phys(__va(runtime->set_virtual_address_map), | |
568 | ia64_boot_param->efi_memmap_size, | |
569 | efi_desc_size, ia64_boot_param->efi_memdesc_version, | |
570 | ia64_boot_param->efi_memmap); | |
571 | if (status != EFI_SUCCESS) { | |
572 | printk(KERN_WARNING "warning: unable to switch EFI into virtual mode " | |
573 | "(status=%lu)\n", status); | |
574 | return; | |
575 | } | |
576 | ||
577 | /* | |
578 | * Now that EFI is in virtual mode, we call the EFI functions more efficiently: | |
579 | */ | |
580 | efi.get_time = virt_get_time; | |
581 | efi.set_time = virt_set_time; | |
582 | efi.get_wakeup_time = virt_get_wakeup_time; | |
583 | efi.set_wakeup_time = virt_set_wakeup_time; | |
584 | efi.get_variable = virt_get_variable; | |
585 | efi.get_next_variable = virt_get_next_variable; | |
586 | efi.set_variable = virt_set_variable; | |
587 | efi.get_next_high_mono_count = virt_get_next_high_mono_count; | |
588 | efi.reset_system = virt_reset_system; | |
589 | } | |
590 | ||
591 | /* | |
592 | * Walk the EFI memory map looking for the I/O port range. There can only be one entry of | |
593 | * this type, other I/O port ranges should be described via ACPI. | |
594 | */ | |
595 | u64 | |
596 | efi_get_iobase (void) | |
597 | { | |
598 | void *efi_map_start, *efi_map_end, *p; | |
599 | efi_memory_desc_t *md; | |
600 | u64 efi_desc_size; | |
601 | ||
602 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
603 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
604 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
605 | ||
606 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
607 | md = p; | |
608 | if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) { | |
609 | if (md->attribute & EFI_MEMORY_UC) | |
610 | return md->phys_addr; | |
611 | } | |
612 | } | |
613 | return 0; | |
614 | } | |
615 | ||
80851ef2 BH |
616 | static efi_memory_desc_t * |
617 | efi_memory_descriptor (unsigned long phys_addr) | |
1da177e4 LT |
618 | { |
619 | void *efi_map_start, *efi_map_end, *p; | |
620 | efi_memory_desc_t *md; | |
621 | u64 efi_desc_size; | |
622 | ||
623 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
624 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
625 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
626 | ||
627 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
628 | md = p; | |
629 | ||
630 | if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) | |
80851ef2 | 631 | return md; |
1da177e4 LT |
632 | } |
633 | return 0; | |
634 | } | |
635 | ||
80851ef2 BH |
636 | static int |
637 | efi_memmap_has_mmio (void) | |
1da177e4 LT |
638 | { |
639 | void *efi_map_start, *efi_map_end, *p; | |
640 | efi_memory_desc_t *md; | |
641 | u64 efi_desc_size; | |
642 | ||
643 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
644 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
645 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
646 | ||
647 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
648 | md = p; | |
649 | ||
80851ef2 BH |
650 | if (md->type == EFI_MEMORY_MAPPED_IO) |
651 | return 1; | |
1da177e4 LT |
652 | } |
653 | return 0; | |
654 | } | |
80851ef2 BH |
655 | |
656 | u32 | |
657 | efi_mem_type (unsigned long phys_addr) | |
658 | { | |
659 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
660 | ||
661 | if (md) | |
662 | return md->type; | |
663 | return 0; | |
664 | } | |
665 | ||
666 | u64 | |
667 | efi_mem_attributes (unsigned long phys_addr) | |
668 | { | |
669 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
670 | ||
671 | if (md) | |
672 | return md->attribute; | |
673 | return 0; | |
674 | } | |
1da177e4 LT |
675 | EXPORT_SYMBOL(efi_mem_attributes); |
676 | ||
80851ef2 BH |
677 | /* |
678 | * Determines whether the memory at phys_addr supports the desired | |
679 | * attribute (WB, UC, etc). If this returns 1, the caller can safely | |
680 | * access *size bytes at phys_addr with the specified attribute. | |
681 | */ | |
682 | static int | |
683 | efi_mem_attribute_range (unsigned long phys_addr, unsigned long *size, u64 attr) | |
684 | { | |
685 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
686 | unsigned long md_end; | |
687 | ||
688 | if (!md || (md->attribute & attr) != attr) | |
689 | return 0; | |
690 | ||
691 | do { | |
692 | md_end = efi_md_end(md); | |
693 | if (phys_addr + *size <= md_end) | |
694 | return 1; | |
695 | ||
696 | md = efi_memory_descriptor(md_end); | |
697 | if (!md || (md->attribute & attr) != attr) { | |
698 | *size = md_end - phys_addr; | |
699 | return 1; | |
700 | } | |
701 | } while (md); | |
702 | return 0; | |
703 | } | |
704 | ||
705 | /* | |
706 | * For /dev/mem, we only allow read & write system calls to access | |
707 | * write-back memory, because read & write don't allow the user to | |
708 | * control access size. | |
709 | */ | |
1da177e4 LT |
710 | int |
711 | valid_phys_addr_range (unsigned long phys_addr, unsigned long *size) | |
712 | { | |
80851ef2 BH |
713 | return efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB); |
714 | } | |
1da177e4 | 715 | |
80851ef2 BH |
716 | /* |
717 | * We allow mmap of anything in the EFI memory map that supports | |
718 | * either write-back or uncacheable access. For uncacheable regions, | |
719 | * the supported access sizes are system-dependent, and the user is | |
720 | * responsible for using the correct size. | |
721 | * | |
722 | * Note that this doesn't currently allow access to hot-added memory, | |
723 | * because that doesn't appear in the boot-time EFI memory map. | |
724 | */ | |
725 | int | |
726 | valid_mmap_phys_addr_range (unsigned long phys_addr, unsigned long *size) | |
727 | { | |
728 | if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB)) | |
729 | return 1; | |
1da177e4 | 730 | |
80851ef2 BH |
731 | if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_UC)) |
732 | return 1; | |
1da177e4 | 733 | |
80851ef2 BH |
734 | /* |
735 | * Some firmware doesn't report MMIO regions in the EFI memory map. | |
736 | * The Intel BigSur (a.k.a. HP i2000) has this problem. In this | |
737 | * case, we can't use the EFI memory map to validate mmap requests. | |
738 | */ | |
739 | if (!efi_memmap_has_mmio()) | |
740 | return 1; | |
1da177e4 | 741 | |
1da177e4 LT |
742 | return 0; |
743 | } | |
744 | ||
745 | int __init | |
746 | efi_uart_console_only(void) | |
747 | { | |
748 | efi_status_t status; | |
749 | char *s, name[] = "ConOut"; | |
750 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; | |
751 | efi_char16_t *utf16, name_utf16[32]; | |
752 | unsigned char data[1024]; | |
753 | unsigned long size = sizeof(data); | |
754 | struct efi_generic_dev_path *hdr, *end_addr; | |
755 | int uart = 0; | |
756 | ||
757 | /* Convert to UTF-16 */ | |
758 | utf16 = name_utf16; | |
759 | s = name; | |
760 | while (*s) | |
761 | *utf16++ = *s++ & 0x7f; | |
762 | *utf16 = 0; | |
763 | ||
764 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); | |
765 | if (status != EFI_SUCCESS) { | |
766 | printk(KERN_ERR "No EFI %s variable?\n", name); | |
767 | return 0; | |
768 | } | |
769 | ||
770 | hdr = (struct efi_generic_dev_path *) data; | |
771 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); | |
772 | while (hdr < end_addr) { | |
773 | if (hdr->type == EFI_DEV_MSG && | |
774 | hdr->sub_type == EFI_DEV_MSG_UART) | |
775 | uart = 1; | |
776 | else if (hdr->type == EFI_DEV_END_PATH || | |
777 | hdr->type == EFI_DEV_END_PATH2) { | |
778 | if (!uart) | |
779 | return 0; | |
780 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) | |
781 | return 1; | |
782 | uart = 0; | |
783 | } | |
784 | hdr = (struct efi_generic_dev_path *) ((u8 *) hdr + hdr->length); | |
785 | } | |
786 | printk(KERN_ERR "Malformed %s value\n", name); | |
787 | return 0; | |
788 | } | |
d8c97d5f | 789 | |
d8c97d5f TL |
790 | /* |
791 | * Look for the first granule aligned memory descriptor memory | |
792 | * that is big enough to hold EFI memory map. Make sure this | |
793 | * descriptor is atleast granule sized so it does not get trimmed | |
794 | */ | |
795 | struct kern_memdesc * | |
796 | find_memmap_space (void) | |
797 | { | |
798 | u64 contig_low=0, contig_high=0; | |
799 | u64 as = 0, ae; | |
800 | void *efi_map_start, *efi_map_end, *p, *q; | |
801 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
802 | u64 space_needed, efi_desc_size; | |
803 | unsigned long total_mem = 0; | |
804 | ||
805 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
806 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
807 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
808 | ||
809 | /* | |
810 | * Worst case: we need 3 kernel descriptors for each efi descriptor | |
811 | * (if every entry has a WB part in the middle, and UC head and tail), | |
812 | * plus one for the end marker. | |
813 | */ | |
814 | space_needed = sizeof(kern_memdesc_t) * | |
815 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); | |
816 | ||
817 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
818 | md = p; | |
819 | if (!efi_wb(md)) { | |
820 | continue; | |
821 | } | |
822 | if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) { | |
823 | contig_low = GRANULEROUNDUP(md->phys_addr); | |
824 | contig_high = efi_md_end(md); | |
825 | for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) { | |
826 | check_md = q; | |
827 | if (!efi_wb(check_md)) | |
828 | break; | |
829 | if (contig_high != check_md->phys_addr) | |
830 | break; | |
831 | contig_high = efi_md_end(check_md); | |
832 | } | |
833 | contig_high = GRANULEROUNDDOWN(contig_high); | |
834 | } | |
835 | if (!is_available_memory(md) || md->type == EFI_LOADER_DATA) | |
836 | continue; | |
837 | ||
838 | /* Round ends inward to granule boundaries */ | |
839 | as = max(contig_low, md->phys_addr); | |
840 | ae = min(contig_high, efi_md_end(md)); | |
841 | ||
842 | /* keep within max_addr= command line arg */ | |
843 | ae = min(ae, max_addr); | |
844 | if (ae <= as) | |
845 | continue; | |
846 | ||
847 | /* avoid going over mem= command line arg */ | |
848 | if (total_mem + (ae - as) > mem_limit) | |
849 | ae -= total_mem + (ae - as) - mem_limit; | |
850 | ||
851 | if (ae <= as) | |
852 | continue; | |
853 | ||
854 | if (ae - as > space_needed) | |
855 | break; | |
856 | } | |
857 | if (p >= efi_map_end) | |
858 | panic("Can't allocate space for kernel memory descriptors"); | |
859 | ||
860 | return __va(as); | |
861 | } | |
862 | ||
863 | /* | |
864 | * Walk the EFI memory map and gather all memory available for kernel | |
865 | * to use. We can allocate partial granules only if the unavailable | |
866 | * parts exist, and are WB. | |
867 | */ | |
868 | void | |
869 | efi_memmap_init(unsigned long *s, unsigned long *e) | |
870 | { | |
871 | struct kern_memdesc *k, *prev = 0; | |
872 | u64 contig_low=0, contig_high=0; | |
873 | u64 as, ae, lim; | |
874 | void *efi_map_start, *efi_map_end, *p, *q; | |
875 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
876 | u64 efi_desc_size; | |
877 | unsigned long total_mem = 0; | |
878 | ||
879 | k = kern_memmap = find_memmap_space(); | |
880 | ||
881 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
882 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
883 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
884 | ||
885 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
886 | md = p; | |
887 | if (!efi_wb(md)) { | |
888 | if (efi_uc(md) && (md->type == EFI_CONVENTIONAL_MEMORY || | |
889 | md->type == EFI_BOOT_SERVICES_DATA)) { | |
890 | k->attribute = EFI_MEMORY_UC; | |
891 | k->start = md->phys_addr; | |
892 | k->num_pages = md->num_pages; | |
893 | k++; | |
894 | } | |
895 | continue; | |
896 | } | |
897 | if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) { | |
898 | contig_low = GRANULEROUNDUP(md->phys_addr); | |
899 | contig_high = efi_md_end(md); | |
900 | for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) { | |
901 | check_md = q; | |
902 | if (!efi_wb(check_md)) | |
903 | break; | |
904 | if (contig_high != check_md->phys_addr) | |
905 | break; | |
906 | contig_high = efi_md_end(check_md); | |
907 | } | |
908 | contig_high = GRANULEROUNDDOWN(contig_high); | |
909 | } | |
910 | if (!is_available_memory(md)) | |
911 | continue; | |
912 | ||
913 | /* | |
914 | * Round ends inward to granule boundaries | |
915 | * Give trimmings to uncached allocator | |
916 | */ | |
917 | if (md->phys_addr < contig_low) { | |
918 | lim = min(efi_md_end(md), contig_low); | |
919 | if (efi_uc(md)) { | |
920 | if (k > kern_memmap && (k-1)->attribute == EFI_MEMORY_UC && | |
921 | kmd_end(k-1) == md->phys_addr) { | |
922 | (k-1)->num_pages += (lim - md->phys_addr) >> EFI_PAGE_SHIFT; | |
923 | } else { | |
924 | k->attribute = EFI_MEMORY_UC; | |
925 | k->start = md->phys_addr; | |
926 | k->num_pages = (lim - md->phys_addr) >> EFI_PAGE_SHIFT; | |
927 | k++; | |
928 | } | |
929 | } | |
930 | as = contig_low; | |
931 | } else | |
932 | as = md->phys_addr; | |
933 | ||
934 | if (efi_md_end(md) > contig_high) { | |
935 | lim = max(md->phys_addr, contig_high); | |
936 | if (efi_uc(md)) { | |
937 | if (lim == md->phys_addr && k > kern_memmap && | |
938 | (k-1)->attribute == EFI_MEMORY_UC && | |
939 | kmd_end(k-1) == md->phys_addr) { | |
940 | (k-1)->num_pages += md->num_pages; | |
941 | } else { | |
942 | k->attribute = EFI_MEMORY_UC; | |
943 | k->start = lim; | |
944 | k->num_pages = (efi_md_end(md) - lim) >> EFI_PAGE_SHIFT; | |
945 | k++; | |
946 | } | |
947 | } | |
948 | ae = contig_high; | |
949 | } else | |
950 | ae = efi_md_end(md); | |
951 | ||
952 | /* keep within max_addr= command line arg */ | |
953 | ae = min(ae, max_addr); | |
954 | if (ae <= as) | |
955 | continue; | |
956 | ||
957 | /* avoid going over mem= command line arg */ | |
958 | if (total_mem + (ae - as) > mem_limit) | |
959 | ae -= total_mem + (ae - as) - mem_limit; | |
960 | ||
961 | if (ae <= as) | |
962 | continue; | |
963 | if (prev && kmd_end(prev) == md->phys_addr) { | |
964 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; | |
965 | total_mem += ae - as; | |
966 | continue; | |
967 | } | |
968 | k->attribute = EFI_MEMORY_WB; | |
969 | k->start = as; | |
970 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; | |
971 | total_mem += ae - as; | |
972 | prev = k++; | |
973 | } | |
974 | k->start = ~0L; /* end-marker */ | |
975 | ||
976 | /* reserve the memory we are using for kern_memmap */ | |
977 | *s = (u64)kern_memmap; | |
978 | *e = (u64)++k; | |
979 | } | |
be379124 KA |
980 | |
981 | void | |
982 | efi_initialize_iomem_resources(struct resource *code_resource, | |
983 | struct resource *data_resource) | |
984 | { | |
985 | struct resource *res; | |
986 | void *efi_map_start, *efi_map_end, *p; | |
987 | efi_memory_desc_t *md; | |
988 | u64 efi_desc_size; | |
989 | char *name; | |
990 | unsigned long flags; | |
991 | ||
992 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
993 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
994 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
995 | ||
996 | res = NULL; | |
997 | ||
998 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
999 | md = p; | |
1000 | ||
1001 | if (md->num_pages == 0) /* should not happen */ | |
1002 | continue; | |
1003 | ||
1004 | flags = IORESOURCE_MEM; | |
1005 | switch (md->type) { | |
1006 | ||
1007 | case EFI_MEMORY_MAPPED_IO: | |
1008 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1009 | continue; | |
1010 | ||
1011 | case EFI_LOADER_CODE: | |
1012 | case EFI_LOADER_DATA: | |
1013 | case EFI_BOOT_SERVICES_DATA: | |
1014 | case EFI_BOOT_SERVICES_CODE: | |
1015 | case EFI_CONVENTIONAL_MEMORY: | |
1016 | if (md->attribute & EFI_MEMORY_WP) { | |
1017 | name = "System ROM"; | |
1018 | flags |= IORESOURCE_READONLY; | |
1019 | } else { | |
1020 | name = "System RAM"; | |
1021 | } | |
1022 | break; | |
1023 | ||
1024 | case EFI_ACPI_MEMORY_NVS: | |
1025 | name = "ACPI Non-volatile Storage"; | |
1026 | flags |= IORESOURCE_BUSY; | |
1027 | break; | |
1028 | ||
1029 | case EFI_UNUSABLE_MEMORY: | |
1030 | name = "reserved"; | |
1031 | flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED; | |
1032 | break; | |
1033 | ||
1034 | case EFI_RESERVED_TYPE: | |
1035 | case EFI_RUNTIME_SERVICES_CODE: | |
1036 | case EFI_RUNTIME_SERVICES_DATA: | |
1037 | case EFI_ACPI_RECLAIM_MEMORY: | |
1038 | default: | |
1039 | name = "reserved"; | |
1040 | flags |= IORESOURCE_BUSY; | |
1041 | break; | |
1042 | } | |
1043 | ||
baf47fb6 | 1044 | if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) { |
be379124 KA |
1045 | printk(KERN_ERR "failed to alocate resource for iomem\n"); |
1046 | return; | |
1047 | } | |
1048 | ||
1049 | res->name = name; | |
1050 | res->start = md->phys_addr; | |
1051 | res->end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1; | |
1052 | res->flags = flags; | |
1053 | ||
1054 | if (insert_resource(&iomem_resource, res) < 0) | |
1055 | kfree(res); | |
1056 | else { | |
1057 | /* | |
1058 | * We don't know which region contains | |
1059 | * kernel data so we try it repeatedly and | |
1060 | * let the resource manager test it. | |
1061 | */ | |
1062 | insert_resource(res, code_resource); | |
1063 | insert_resource(res, data_resource); | |
1064 | } | |
1065 | } | |
1066 | } |