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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> | |
32e62c63 BH |
11 | * (c) Copyright 2006 Hewlett-Packard Development Company, L.P. |
12 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
13 | * |
14 | * All EFI Runtime Services are not implemented yet as EFI only | |
15 | * supports physical mode addressing on SoftSDV. This is to be fixed | |
16 | * in a future version. --drummond 1999-07-20 | |
17 | * | |
18 | * Implemented EFI runtime services and virtual mode calls. --davidm | |
19 | * | |
20 | * Goutham Rao: <goutham.rao@intel.com> | |
21 | * Skip non-WB memory and ignore empty memory ranges. | |
22 | */ | |
1da177e4 LT |
23 | #include <linux/module.h> |
24 | #include <linux/kernel.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/efi.h> | |
29 | ||
30 | #include <asm/io.h> | |
31 | #include <asm/kregs.h> | |
32 | #include <asm/meminit.h> | |
33 | #include <asm/pgtable.h> | |
34 | #include <asm/processor.h> | |
35 | #include <asm/mca.h> | |
36 | ||
37 | #define EFI_DEBUG 0 | |
38 | ||
39 | extern efi_status_t efi_call_phys (void *, ...); | |
40 | ||
41 | struct efi efi; | |
42 | EXPORT_SYMBOL(efi); | |
43 | static efi_runtime_services_t *runtime; | |
44 | static unsigned long mem_limit = ~0UL, max_addr = ~0UL; | |
45 | ||
46 | #define efi_call_virt(f, args...) (*(f))(args) | |
47 | ||
48 | #define STUB_GET_TIME(prefix, adjust_arg) \ | |
49 | static efi_status_t \ | |
50 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ | |
51 | { \ | |
52 | struct ia64_fpreg fr[6]; \ | |
53 | efi_time_cap_t *atc = NULL; \ | |
54 | efi_status_t ret; \ | |
55 | \ | |
56 | if (tc) \ | |
57 | atc = adjust_arg(tc); \ | |
58 | ia64_save_scratch_fpregs(fr); \ | |
59 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), adjust_arg(tm), atc); \ | |
60 | ia64_load_scratch_fpregs(fr); \ | |
61 | return ret; \ | |
62 | } | |
63 | ||
64 | #define STUB_SET_TIME(prefix, adjust_arg) \ | |
65 | static efi_status_t \ | |
66 | prefix##_set_time (efi_time_t *tm) \ | |
67 | { \ | |
68 | struct ia64_fpreg fr[6]; \ | |
69 | efi_status_t ret; \ | |
70 | \ | |
71 | ia64_save_scratch_fpregs(fr); \ | |
72 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), adjust_arg(tm)); \ | |
73 | ia64_load_scratch_fpregs(fr); \ | |
74 | return ret; \ | |
75 | } | |
76 | ||
77 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ | |
78 | static efi_status_t \ | |
79 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm) \ | |
80 | { \ | |
81 | struct ia64_fpreg fr[6]; \ | |
82 | efi_status_t ret; \ | |
83 | \ | |
84 | ia64_save_scratch_fpregs(fr); \ | |
85 | ret = efi_call_##prefix((efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ | |
86 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ | |
87 | ia64_load_scratch_fpregs(fr); \ | |
88 | return ret; \ | |
89 | } | |
90 | ||
91 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ | |
92 | static efi_status_t \ | |
93 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ | |
94 | { \ | |
95 | struct ia64_fpreg fr[6]; \ | |
96 | efi_time_t *atm = NULL; \ | |
97 | efi_status_t ret; \ | |
98 | \ | |
99 | if (tm) \ | |
100 | atm = adjust_arg(tm); \ | |
101 | ia64_save_scratch_fpregs(fr); \ | |
102 | ret = efi_call_##prefix((efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ | |
103 | enabled, atm); \ | |
104 | ia64_load_scratch_fpregs(fr); \ | |
105 | return ret; \ | |
106 | } | |
107 | ||
108 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ | |
109 | static efi_status_t \ | |
110 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ | |
111 | unsigned long *data_size, void *data) \ | |
112 | { \ | |
113 | struct ia64_fpreg fr[6]; \ | |
114 | u32 *aattr = NULL; \ | |
115 | efi_status_t ret; \ | |
116 | \ | |
117 | if (attr) \ | |
118 | aattr = adjust_arg(attr); \ | |
119 | ia64_save_scratch_fpregs(fr); \ | |
120 | ret = efi_call_##prefix((efi_get_variable_t *) __va(runtime->get_variable), \ | |
121 | adjust_arg(name), adjust_arg(vendor), aattr, \ | |
122 | adjust_arg(data_size), adjust_arg(data)); \ | |
123 | ia64_load_scratch_fpregs(fr); \ | |
124 | return ret; \ | |
125 | } | |
126 | ||
127 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ | |
128 | static efi_status_t \ | |
129 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor) \ | |
130 | { \ | |
131 | struct ia64_fpreg fr[6]; \ | |
132 | efi_status_t ret; \ | |
133 | \ | |
134 | ia64_save_scratch_fpregs(fr); \ | |
135 | ret = efi_call_##prefix((efi_get_next_variable_t *) __va(runtime->get_next_variable), \ | |
136 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ | |
137 | ia64_load_scratch_fpregs(fr); \ | |
138 | return ret; \ | |
139 | } | |
140 | ||
141 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ | |
142 | static efi_status_t \ | |
143 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, unsigned long attr, \ | |
144 | unsigned long data_size, void *data) \ | |
145 | { \ | |
146 | struct ia64_fpreg fr[6]; \ | |
147 | efi_status_t ret; \ | |
148 | \ | |
149 | ia64_save_scratch_fpregs(fr); \ | |
150 | ret = efi_call_##prefix((efi_set_variable_t *) __va(runtime->set_variable), \ | |
151 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ | |
152 | adjust_arg(data)); \ | |
153 | ia64_load_scratch_fpregs(fr); \ | |
154 | return ret; \ | |
155 | } | |
156 | ||
157 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ | |
158 | static efi_status_t \ | |
159 | prefix##_get_next_high_mono_count (u32 *count) \ | |
160 | { \ | |
161 | struct ia64_fpreg fr[6]; \ | |
162 | efi_status_t ret; \ | |
163 | \ | |
164 | ia64_save_scratch_fpregs(fr); \ | |
165 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ | |
166 | __va(runtime->get_next_high_mono_count), adjust_arg(count)); \ | |
167 | ia64_load_scratch_fpregs(fr); \ | |
168 | return ret; \ | |
169 | } | |
170 | ||
171 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ | |
172 | static void \ | |
173 | prefix##_reset_system (int reset_type, efi_status_t status, \ | |
174 | unsigned long data_size, efi_char16_t *data) \ | |
175 | { \ | |
176 | struct ia64_fpreg fr[6]; \ | |
177 | efi_char16_t *adata = NULL; \ | |
178 | \ | |
179 | if (data) \ | |
180 | adata = adjust_arg(data); \ | |
181 | \ | |
182 | ia64_save_scratch_fpregs(fr); \ | |
183 | efi_call_##prefix((efi_reset_system_t *) __va(runtime->reset_system), \ | |
184 | reset_type, status, data_size, adata); \ | |
185 | /* should not return, but just in case... */ \ | |
186 | ia64_load_scratch_fpregs(fr); \ | |
187 | } | |
188 | ||
189 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) | |
190 | ||
191 | STUB_GET_TIME(phys, phys_ptr) | |
192 | STUB_SET_TIME(phys, phys_ptr) | |
193 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) | |
194 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) | |
195 | STUB_GET_VARIABLE(phys, phys_ptr) | |
196 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) | |
197 | STUB_SET_VARIABLE(phys, phys_ptr) | |
198 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) | |
199 | STUB_RESET_SYSTEM(phys, phys_ptr) | |
200 | ||
201 | #define id(arg) arg | |
202 | ||
203 | STUB_GET_TIME(virt, id) | |
204 | STUB_SET_TIME(virt, id) | |
205 | STUB_GET_WAKEUP_TIME(virt, id) | |
206 | STUB_SET_WAKEUP_TIME(virt, id) | |
207 | STUB_GET_VARIABLE(virt, id) | |
208 | STUB_GET_NEXT_VARIABLE(virt, id) | |
209 | STUB_SET_VARIABLE(virt, id) | |
210 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) | |
211 | STUB_RESET_SYSTEM(virt, id) | |
212 | ||
213 | void | |
214 | efi_gettimeofday (struct timespec *ts) | |
215 | { | |
216 | efi_time_t tm; | |
217 | ||
218 | memset(ts, 0, sizeof(ts)); | |
219 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) | |
220 | return; | |
221 | ||
222 | ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second); | |
223 | ts->tv_nsec = tm.nanosecond; | |
224 | } | |
225 | ||
226 | static int | |
227 | is_available_memory (efi_memory_desc_t *md) | |
228 | { | |
229 | if (!(md->attribute & EFI_MEMORY_WB)) | |
230 | return 0; | |
231 | ||
232 | switch (md->type) { | |
233 | case EFI_LOADER_CODE: | |
234 | case EFI_LOADER_DATA: | |
235 | case EFI_BOOT_SERVICES_CODE: | |
236 | case EFI_BOOT_SERVICES_DATA: | |
237 | case EFI_CONVENTIONAL_MEMORY: | |
238 | return 1; | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | ||
d8c97d5f TL |
243 | typedef struct kern_memdesc { |
244 | u64 attribute; | |
245 | u64 start; | |
246 | u64 num_pages; | |
247 | } kern_memdesc_t; | |
1da177e4 | 248 | |
d8c97d5f | 249 | static kern_memdesc_t *kern_memmap; |
1da177e4 | 250 | |
80851ef2 BH |
251 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
252 | ||
253 | static inline u64 | |
254 | kmd_end(kern_memdesc_t *kmd) | |
255 | { | |
256 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); | |
257 | } | |
258 | ||
259 | static inline u64 | |
260 | efi_md_end(efi_memory_desc_t *md) | |
261 | { | |
262 | return (md->phys_addr + efi_md_size(md)); | |
263 | } | |
264 | ||
265 | static inline int | |
266 | efi_wb(efi_memory_desc_t *md) | |
267 | { | |
268 | return (md->attribute & EFI_MEMORY_WB); | |
269 | } | |
270 | ||
271 | static inline int | |
272 | efi_uc(efi_memory_desc_t *md) | |
273 | { | |
274 | return (md->attribute & EFI_MEMORY_UC); | |
275 | } | |
276 | ||
1da177e4 | 277 | static void |
d8c97d5f | 278 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
1da177e4 | 279 | { |
d8c97d5f TL |
280 | kern_memdesc_t *k; |
281 | u64 start, end, voff; | |
1da177e4 | 282 | |
d8c97d5f TL |
283 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
284 | for (k = kern_memmap; k->start != ~0UL; k++) { | |
285 | if (k->attribute != attr) | |
286 | continue; | |
287 | start = PAGE_ALIGN(k->start); | |
288 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; | |
289 | if (start < end) | |
290 | if ((*callback)(start + voff, end + voff, arg) < 0) | |
291 | return; | |
292 | } | |
1da177e4 LT |
293 | } |
294 | ||
295 | /* | |
296 | * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that | |
297 | * has memory that is available for OS use. | |
298 | */ | |
299 | void | |
300 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) | |
301 | { | |
d8c97d5f | 302 | walk(callback, arg, EFI_MEMORY_WB); |
1da177e4 LT |
303 | } |
304 | ||
f14f75b8 | 305 | /* |
d8c97d5f TL |
306 | * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that |
307 | * has memory that is available for uncached allocator. | |
f14f75b8 | 308 | */ |
d8c97d5f TL |
309 | void |
310 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) | |
f14f75b8 | 311 | { |
d8c97d5f | 312 | walk(callback, arg, EFI_MEMORY_UC); |
f14f75b8 JS |
313 | } |
314 | ||
1da177e4 LT |
315 | /* |
316 | * Look for the PAL_CODE region reported by EFI and maps it using an | |
317 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor | |
318 | * Abstraction Layer chapter 11 in ADAG | |
319 | */ | |
320 | ||
321 | void * | |
322 | efi_get_pal_addr (void) | |
323 | { | |
324 | void *efi_map_start, *efi_map_end, *p; | |
325 | efi_memory_desc_t *md; | |
326 | u64 efi_desc_size; | |
327 | int pal_code_count = 0; | |
328 | u64 vaddr, mask; | |
329 | ||
330 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
331 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
332 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
333 | ||
334 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
335 | md = p; | |
336 | if (md->type != EFI_PAL_CODE) | |
337 | continue; | |
338 | ||
339 | if (++pal_code_count > 1) { | |
340 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, dropped @ %lx\n", | |
341 | md->phys_addr); | |
342 | continue; | |
343 | } | |
344 | /* | |
345 | * The only ITLB entry in region 7 that is used is the one installed by | |
346 | * __start(). That entry covers a 64MB range. | |
347 | */ | |
348 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); | |
349 | vaddr = PAGE_OFFSET + md->phys_addr; | |
350 | ||
351 | /* | |
352 | * We must check that the PAL mapping won't overlap with the kernel | |
353 | * mapping. | |
354 | * | |
355 | * PAL code is guaranteed to be aligned on a power of 2 between 4k and | |
356 | * 256KB and that only one ITR is needed to map it. This implies that the | |
357 | * PAL code is always aligned on its size, i.e., the closest matching page | |
358 | * size supported by the TLB. Therefore PAL code is guaranteed never to | |
359 | * cross a 64MB unless it is bigger than 64MB (very unlikely!). So for | |
360 | * now the following test is enough to determine whether or not we need a | |
361 | * dedicated ITR for the PAL code. | |
362 | */ | |
363 | if ((vaddr & mask) == (KERNEL_START & mask)) { | |
364 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", | |
365 | __FUNCTION__); | |
366 | continue; | |
367 | } | |
368 | ||
369 | if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE) | |
370 | panic("Woah! PAL code size bigger than a granule!"); | |
371 | ||
372 | #if EFI_DEBUG | |
373 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); | |
374 | ||
375 | printk(KERN_INFO "CPU %d: mapping PAL code [0x%lx-0x%lx) into [0x%lx-0x%lx)\n", | |
376 | smp_processor_id(), md->phys_addr, | |
377 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
378 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); | |
379 | #endif | |
380 | return __va(md->phys_addr); | |
381 | } | |
382 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found", | |
383 | __FUNCTION__); | |
384 | return NULL; | |
385 | } | |
386 | ||
387 | void | |
388 | efi_map_pal_code (void) | |
389 | { | |
390 | void *pal_vaddr = efi_get_pal_addr (); | |
391 | u64 psr; | |
392 | ||
393 | if (!pal_vaddr) | |
394 | return; | |
395 | ||
396 | /* | |
397 | * Cannot write to CRx with PSR.ic=1 | |
398 | */ | |
399 | psr = ia64_clear_ic(); | |
400 | ia64_itr(0x1, IA64_TR_PALCODE, GRANULEROUNDDOWN((unsigned long) pal_vaddr), | |
401 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), | |
402 | IA64_GRANULE_SHIFT); | |
403 | ia64_set_psr(psr); /* restore psr */ | |
404 | ia64_srlz_i(); | |
405 | } | |
406 | ||
407 | void __init | |
408 | efi_init (void) | |
409 | { | |
410 | void *efi_map_start, *efi_map_end; | |
411 | efi_config_table_t *config_tables; | |
412 | efi_char16_t *c16; | |
413 | u64 efi_desc_size; | |
9d78f43d | 414 | char *cp, vendor[100] = "unknown"; |
1da177e4 LT |
415 | extern char saved_command_line[]; |
416 | int i; | |
417 | ||
418 | /* it's too early to be able to use the standard kernel command line support... */ | |
419 | for (cp = saved_command_line; *cp; ) { | |
420 | if (memcmp(cp, "mem=", 4) == 0) { | |
9d78f43d | 421 | mem_limit = memparse(cp + 4, &cp); |
1da177e4 | 422 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
9d78f43d | 423 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
1da177e4 LT |
424 | } else { |
425 | while (*cp != ' ' && *cp) | |
426 | ++cp; | |
427 | while (*cp == ' ') | |
428 | ++cp; | |
429 | } | |
430 | } | |
431 | if (max_addr != ~0UL) | |
432 | printk(KERN_INFO "Ignoring memory above %luMB\n", max_addr >> 20); | |
433 | ||
434 | efi.systab = __va(ia64_boot_param->efi_systab); | |
435 | ||
436 | /* | |
437 | * Verify the EFI Table | |
438 | */ | |
439 | if (efi.systab == NULL) | |
440 | panic("Woah! Can't find EFI system table.\n"); | |
441 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) | |
442 | panic("Woah! EFI system table signature incorrect\n"); | |
443 | if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0) | |
444 | printk(KERN_WARNING "Warning: EFI system table major version mismatch: " | |
445 | "got %d.%02d, expected %d.%02d\n", | |
446 | efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, | |
447 | EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff); | |
448 | ||
449 | config_tables = __va(efi.systab->tables); | |
450 | ||
451 | /* Show what we know for posterity */ | |
452 | c16 = __va(efi.systab->fw_vendor); | |
453 | if (c16) { | |
ecdd5dab | 454 | for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i) |
1da177e4 LT |
455 | vendor[i] = *c16++; |
456 | vendor[i] = '\0'; | |
457 | } | |
458 | ||
459 | printk(KERN_INFO "EFI v%u.%.02u by %s:", | |
460 | efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor); | |
461 | ||
b2c99e3c BH |
462 | efi.mps = EFI_INVALID_TABLE_ADDR; |
463 | efi.acpi = EFI_INVALID_TABLE_ADDR; | |
464 | efi.acpi20 = EFI_INVALID_TABLE_ADDR; | |
465 | efi.smbios = EFI_INVALID_TABLE_ADDR; | |
466 | efi.sal_systab = EFI_INVALID_TABLE_ADDR; | |
467 | efi.boot_info = EFI_INVALID_TABLE_ADDR; | |
468 | efi.hcdp = EFI_INVALID_TABLE_ADDR; | |
469 | efi.uga = EFI_INVALID_TABLE_ADDR; | |
470 | ||
1da177e4 LT |
471 | for (i = 0; i < (int) efi.systab->nr_tables; i++) { |
472 | if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) { | |
b2c99e3c | 473 | efi.mps = config_tables[i].table; |
1da177e4 LT |
474 | printk(" MPS=0x%lx", config_tables[i].table); |
475 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) { | |
b2c99e3c | 476 | efi.acpi20 = config_tables[i].table; |
1da177e4 LT |
477 | printk(" ACPI 2.0=0x%lx", config_tables[i].table); |
478 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) { | |
b2c99e3c | 479 | efi.acpi = config_tables[i].table; |
1da177e4 LT |
480 | printk(" ACPI=0x%lx", config_tables[i].table); |
481 | } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) { | |
b2c99e3c | 482 | efi.smbios = config_tables[i].table; |
1da177e4 LT |
483 | printk(" SMBIOS=0x%lx", config_tables[i].table); |
484 | } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) { | |
b2c99e3c | 485 | efi.sal_systab = config_tables[i].table; |
1da177e4 LT |
486 | printk(" SALsystab=0x%lx", config_tables[i].table); |
487 | } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) { | |
b2c99e3c | 488 | efi.hcdp = config_tables[i].table; |
1da177e4 LT |
489 | printk(" HCDP=0x%lx", config_tables[i].table); |
490 | } | |
491 | } | |
492 | printk("\n"); | |
493 | ||
494 | runtime = __va(efi.systab->runtime); | |
495 | efi.get_time = phys_get_time; | |
496 | efi.set_time = phys_set_time; | |
497 | efi.get_wakeup_time = phys_get_wakeup_time; | |
498 | efi.set_wakeup_time = phys_set_wakeup_time; | |
499 | efi.get_variable = phys_get_variable; | |
500 | efi.get_next_variable = phys_get_next_variable; | |
501 | efi.set_variable = phys_set_variable; | |
502 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; | |
503 | efi.reset_system = phys_reset_system; | |
504 | ||
505 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
506 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
507 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
508 | ||
509 | #if EFI_DEBUG | |
510 | /* print EFI memory map: */ | |
511 | { | |
512 | efi_memory_desc_t *md; | |
513 | void *p; | |
514 | ||
515 | for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) { | |
516 | md = p; | |
517 | printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n", | |
518 | i, md->type, md->attribute, md->phys_addr, | |
519 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
520 | md->num_pages >> (20 - EFI_PAGE_SHIFT)); | |
521 | } | |
522 | } | |
523 | #endif | |
524 | ||
525 | efi_map_pal_code(); | |
526 | efi_enter_virtual_mode(); | |
527 | } | |
528 | ||
529 | void | |
530 | efi_enter_virtual_mode (void) | |
531 | { | |
532 | void *efi_map_start, *efi_map_end, *p; | |
533 | efi_memory_desc_t *md; | |
534 | efi_status_t status; | |
535 | u64 efi_desc_size; | |
536 | ||
537 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
538 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
539 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
540 | ||
541 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
542 | md = p; | |
543 | if (md->attribute & EFI_MEMORY_RUNTIME) { | |
544 | /* | |
545 | * Some descriptors have multiple bits set, so the order of | |
546 | * the tests is relevant. | |
547 | */ | |
548 | if (md->attribute & EFI_MEMORY_WB) { | |
549 | md->virt_addr = (u64) __va(md->phys_addr); | |
550 | } else if (md->attribute & EFI_MEMORY_UC) { | |
551 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
552 | } else if (md->attribute & EFI_MEMORY_WC) { | |
553 | #if 0 | |
554 | md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P | |
555 | | _PAGE_D | |
556 | | _PAGE_MA_WC | |
557 | | _PAGE_PL_0 | |
558 | | _PAGE_AR_RW)); | |
559 | #else | |
560 | printk(KERN_INFO "EFI_MEMORY_WC mapping\n"); | |
561 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
562 | #endif | |
563 | } else if (md->attribute & EFI_MEMORY_WT) { | |
564 | #if 0 | |
565 | md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P | |
566 | | _PAGE_D | _PAGE_MA_WT | |
567 | | _PAGE_PL_0 | |
568 | | _PAGE_AR_RW)); | |
569 | #else | |
570 | printk(KERN_INFO "EFI_MEMORY_WT mapping\n"); | |
571 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); | |
572 | #endif | |
573 | } | |
574 | } | |
575 | } | |
576 | ||
577 | status = efi_call_phys(__va(runtime->set_virtual_address_map), | |
578 | ia64_boot_param->efi_memmap_size, | |
579 | efi_desc_size, ia64_boot_param->efi_memdesc_version, | |
580 | ia64_boot_param->efi_memmap); | |
581 | if (status != EFI_SUCCESS) { | |
582 | printk(KERN_WARNING "warning: unable to switch EFI into virtual mode " | |
583 | "(status=%lu)\n", status); | |
584 | return; | |
585 | } | |
586 | ||
587 | /* | |
588 | * Now that EFI is in virtual mode, we call the EFI functions more efficiently: | |
589 | */ | |
590 | efi.get_time = virt_get_time; | |
591 | efi.set_time = virt_set_time; | |
592 | efi.get_wakeup_time = virt_get_wakeup_time; | |
593 | efi.set_wakeup_time = virt_set_wakeup_time; | |
594 | efi.get_variable = virt_get_variable; | |
595 | efi.get_next_variable = virt_get_next_variable; | |
596 | efi.set_variable = virt_set_variable; | |
597 | efi.get_next_high_mono_count = virt_get_next_high_mono_count; | |
598 | efi.reset_system = virt_reset_system; | |
599 | } | |
600 | ||
601 | /* | |
602 | * Walk the EFI memory map looking for the I/O port range. There can only be one entry of | |
603 | * this type, other I/O port ranges should be described via ACPI. | |
604 | */ | |
605 | u64 | |
606 | efi_get_iobase (void) | |
607 | { | |
608 | void *efi_map_start, *efi_map_end, *p; | |
609 | efi_memory_desc_t *md; | |
610 | u64 efi_desc_size; | |
611 | ||
612 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
613 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
614 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
615 | ||
616 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
617 | md = p; | |
618 | if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) { | |
619 | if (md->attribute & EFI_MEMORY_UC) | |
620 | return md->phys_addr; | |
621 | } | |
622 | } | |
623 | return 0; | |
624 | } | |
625 | ||
32e62c63 BH |
626 | static struct kern_memdesc * |
627 | kern_memory_descriptor (unsigned long phys_addr) | |
1da177e4 | 628 | { |
32e62c63 | 629 | struct kern_memdesc *md; |
1da177e4 | 630 | |
32e62c63 BH |
631 | for (md = kern_memmap; md->start != ~0UL; md++) { |
632 | if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) | |
80851ef2 | 633 | return md; |
1da177e4 LT |
634 | } |
635 | return 0; | |
636 | } | |
637 | ||
32e62c63 BH |
638 | static efi_memory_desc_t * |
639 | efi_memory_descriptor (unsigned long phys_addr) | |
1da177e4 LT |
640 | { |
641 | void *efi_map_start, *efi_map_end, *p; | |
642 | efi_memory_desc_t *md; | |
643 | u64 efi_desc_size; | |
644 | ||
645 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
646 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
647 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
648 | ||
649 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
650 | md = p; | |
651 | ||
32e62c63 BH |
652 | if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) |
653 | return md; | |
1da177e4 LT |
654 | } |
655 | return 0; | |
656 | } | |
80851ef2 BH |
657 | |
658 | u32 | |
659 | efi_mem_type (unsigned long phys_addr) | |
660 | { | |
661 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
662 | ||
663 | if (md) | |
664 | return md->type; | |
665 | return 0; | |
666 | } | |
667 | ||
668 | u64 | |
669 | efi_mem_attributes (unsigned long phys_addr) | |
670 | { | |
671 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
672 | ||
673 | if (md) | |
674 | return md->attribute; | |
675 | return 0; | |
676 | } | |
1da177e4 LT |
677 | EXPORT_SYMBOL(efi_mem_attributes); |
678 | ||
32e62c63 BH |
679 | u64 |
680 | efi_mem_attribute (unsigned long phys_addr, unsigned long size) | |
80851ef2 | 681 | { |
136939a2 | 682 | unsigned long end = phys_addr + size; |
80851ef2 | 683 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
32e62c63 BH |
684 | u64 attr; |
685 | ||
686 | if (!md) | |
687 | return 0; | |
688 | ||
689 | /* | |
690 | * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells | |
691 | * the kernel that firmware needs this region mapped. | |
692 | */ | |
693 | attr = md->attribute & ~EFI_MEMORY_RUNTIME; | |
694 | do { | |
695 | unsigned long md_end = efi_md_end(md); | |
696 | ||
697 | if (end <= md_end) | |
698 | return attr; | |
699 | ||
700 | md = efi_memory_descriptor(md_end); | |
701 | if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) | |
702 | return 0; | |
703 | } while (md); | |
704 | return 0; | |
705 | } | |
706 | ||
707 | u64 | |
708 | kern_mem_attribute (unsigned long phys_addr, unsigned long size) | |
709 | { | |
710 | unsigned long end = phys_addr + size; | |
711 | struct kern_memdesc *md; | |
712 | u64 attr; | |
80851ef2 | 713 | |
136939a2 | 714 | /* |
32e62c63 BH |
715 | * This is a hack for ioremap calls before we set up kern_memmap. |
716 | * Maybe we should do efi_memmap_init() earlier instead. | |
136939a2 | 717 | */ |
32e62c63 BH |
718 | if (!kern_memmap) { |
719 | attr = efi_mem_attribute(phys_addr, size); | |
720 | if (attr & EFI_MEMORY_WB) | |
721 | return EFI_MEMORY_WB; | |
80851ef2 | 722 | return 0; |
136939a2 | 723 | } |
80851ef2 | 724 | |
32e62c63 BH |
725 | md = kern_memory_descriptor(phys_addr); |
726 | if (!md) | |
727 | return 0; | |
728 | ||
729 | attr = md->attribute; | |
80851ef2 | 730 | do { |
32e62c63 | 731 | unsigned long md_end = kmd_end(md); |
136939a2 BH |
732 | |
733 | if (end <= md_end) | |
32e62c63 | 734 | return attr; |
80851ef2 | 735 | |
32e62c63 BH |
736 | md = kern_memory_descriptor(md_end); |
737 | if (!md || md->attribute != attr) | |
136939a2 | 738 | return 0; |
80851ef2 BH |
739 | } while (md); |
740 | return 0; | |
741 | } | |
32e62c63 | 742 | EXPORT_SYMBOL(kern_mem_attribute); |
80851ef2 | 743 | |
1da177e4 | 744 | int |
136939a2 | 745 | valid_phys_addr_range (unsigned long phys_addr, unsigned long size) |
1da177e4 | 746 | { |
32e62c63 BH |
747 | u64 attr; |
748 | ||
749 | /* | |
750 | * /dev/mem reads and writes use copy_to_user(), which implicitly | |
751 | * uses a granule-sized kernel identity mapping. It's really | |
752 | * only safe to do this for regions in kern_memmap. For more | |
753 | * details, see Documentation/ia64/aliasing.txt. | |
754 | */ | |
755 | attr = kern_mem_attribute(phys_addr, size); | |
756 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) | |
757 | return 1; | |
758 | return 0; | |
80851ef2 | 759 | } |
1da177e4 | 760 | |
80851ef2 | 761 | int |
06c67bef | 762 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
80851ef2 | 763 | { |
32e62c63 BH |
764 | /* |
765 | * MMIO regions are often missing from the EFI memory map. | |
766 | * We must allow mmap of them for programs like X, so we | |
767 | * currently can't do any useful validation. | |
768 | */ | |
769 | return 1; | |
770 | } | |
1da177e4 | 771 | |
32e62c63 BH |
772 | pgprot_t |
773 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, | |
774 | pgprot_t vma_prot) | |
775 | { | |
776 | unsigned long phys_addr = pfn << PAGE_SHIFT; | |
777 | u64 attr; | |
1da177e4 | 778 | |
32e62c63 BH |
779 | /* |
780 | * For /dev/mem mmap, we use user mappings, but if the region is | |
781 | * in kern_memmap (and hence may be covered by a kernel mapping), | |
782 | * we must use the same attribute as the kernel mapping. | |
783 | */ | |
784 | attr = kern_mem_attribute(phys_addr, size); | |
785 | if (attr & EFI_MEMORY_WB) | |
786 | return pgprot_cacheable(vma_prot); | |
787 | else if (attr & EFI_MEMORY_UC) | |
788 | return pgprot_noncached(vma_prot); | |
789 | ||
790 | /* | |
791 | * Some chipsets don't support UC access to memory. If | |
792 | * WB is supported, we prefer that. | |
793 | */ | |
794 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) | |
795 | return pgprot_cacheable(vma_prot); | |
796 | ||
797 | return pgprot_noncached(vma_prot); | |
1da177e4 LT |
798 | } |
799 | ||
800 | int __init | |
801 | efi_uart_console_only(void) | |
802 | { | |
803 | efi_status_t status; | |
804 | char *s, name[] = "ConOut"; | |
805 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; | |
806 | efi_char16_t *utf16, name_utf16[32]; | |
807 | unsigned char data[1024]; | |
808 | unsigned long size = sizeof(data); | |
809 | struct efi_generic_dev_path *hdr, *end_addr; | |
810 | int uart = 0; | |
811 | ||
812 | /* Convert to UTF-16 */ | |
813 | utf16 = name_utf16; | |
814 | s = name; | |
815 | while (*s) | |
816 | *utf16++ = *s++ & 0x7f; | |
817 | *utf16 = 0; | |
818 | ||
819 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); | |
820 | if (status != EFI_SUCCESS) { | |
821 | printk(KERN_ERR "No EFI %s variable?\n", name); | |
822 | return 0; | |
823 | } | |
824 | ||
825 | hdr = (struct efi_generic_dev_path *) data; | |
826 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); | |
827 | while (hdr < end_addr) { | |
828 | if (hdr->type == EFI_DEV_MSG && | |
829 | hdr->sub_type == EFI_DEV_MSG_UART) | |
830 | uart = 1; | |
831 | else if (hdr->type == EFI_DEV_END_PATH || | |
832 | hdr->type == EFI_DEV_END_PATH2) { | |
833 | if (!uart) | |
834 | return 0; | |
835 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) | |
836 | return 1; | |
837 | uart = 0; | |
838 | } | |
839 | hdr = (struct efi_generic_dev_path *) ((u8 *) hdr + hdr->length); | |
840 | } | |
841 | printk(KERN_ERR "Malformed %s value\n", name); | |
842 | return 0; | |
843 | } | |
d8c97d5f | 844 | |
d8c97d5f TL |
845 | /* |
846 | * Look for the first granule aligned memory descriptor memory | |
847 | * that is big enough to hold EFI memory map. Make sure this | |
848 | * descriptor is atleast granule sized so it does not get trimmed | |
849 | */ | |
850 | struct kern_memdesc * | |
851 | find_memmap_space (void) | |
852 | { | |
853 | u64 contig_low=0, contig_high=0; | |
854 | u64 as = 0, ae; | |
855 | void *efi_map_start, *efi_map_end, *p, *q; | |
856 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
857 | u64 space_needed, efi_desc_size; | |
858 | unsigned long total_mem = 0; | |
859 | ||
860 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
861 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
862 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
863 | ||
864 | /* | |
865 | * Worst case: we need 3 kernel descriptors for each efi descriptor | |
866 | * (if every entry has a WB part in the middle, and UC head and tail), | |
867 | * plus one for the end marker. | |
868 | */ | |
869 | space_needed = sizeof(kern_memdesc_t) * | |
870 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); | |
871 | ||
872 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
873 | md = p; | |
874 | if (!efi_wb(md)) { | |
875 | continue; | |
876 | } | |
877 | if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) { | |
878 | contig_low = GRANULEROUNDUP(md->phys_addr); | |
879 | contig_high = efi_md_end(md); | |
880 | for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) { | |
881 | check_md = q; | |
882 | if (!efi_wb(check_md)) | |
883 | break; | |
884 | if (contig_high != check_md->phys_addr) | |
885 | break; | |
886 | contig_high = efi_md_end(check_md); | |
887 | } | |
888 | contig_high = GRANULEROUNDDOWN(contig_high); | |
889 | } | |
890 | if (!is_available_memory(md) || md->type == EFI_LOADER_DATA) | |
891 | continue; | |
892 | ||
893 | /* Round ends inward to granule boundaries */ | |
894 | as = max(contig_low, md->phys_addr); | |
895 | ae = min(contig_high, efi_md_end(md)); | |
896 | ||
897 | /* keep within max_addr= command line arg */ | |
898 | ae = min(ae, max_addr); | |
899 | if (ae <= as) | |
900 | continue; | |
901 | ||
902 | /* avoid going over mem= command line arg */ | |
903 | if (total_mem + (ae - as) > mem_limit) | |
904 | ae -= total_mem + (ae - as) - mem_limit; | |
905 | ||
906 | if (ae <= as) | |
907 | continue; | |
908 | ||
909 | if (ae - as > space_needed) | |
910 | break; | |
911 | } | |
912 | if (p >= efi_map_end) | |
913 | panic("Can't allocate space for kernel memory descriptors"); | |
914 | ||
915 | return __va(as); | |
916 | } | |
917 | ||
918 | /* | |
919 | * Walk the EFI memory map and gather all memory available for kernel | |
920 | * to use. We can allocate partial granules only if the unavailable | |
921 | * parts exist, and are WB. | |
922 | */ | |
923 | void | |
924 | efi_memmap_init(unsigned long *s, unsigned long *e) | |
925 | { | |
926 | struct kern_memdesc *k, *prev = 0; | |
927 | u64 contig_low=0, contig_high=0; | |
928 | u64 as, ae, lim; | |
929 | void *efi_map_start, *efi_map_end, *p, *q; | |
930 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
931 | u64 efi_desc_size; | |
932 | unsigned long total_mem = 0; | |
933 | ||
934 | k = kern_memmap = find_memmap_space(); | |
935 | ||
936 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
937 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
938 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
939 | ||
940 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
941 | md = p; | |
942 | if (!efi_wb(md)) { | |
943 | if (efi_uc(md) && (md->type == EFI_CONVENTIONAL_MEMORY || | |
944 | md->type == EFI_BOOT_SERVICES_DATA)) { | |
945 | k->attribute = EFI_MEMORY_UC; | |
946 | k->start = md->phys_addr; | |
947 | k->num_pages = md->num_pages; | |
948 | k++; | |
949 | } | |
950 | continue; | |
951 | } | |
952 | if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) { | |
953 | contig_low = GRANULEROUNDUP(md->phys_addr); | |
954 | contig_high = efi_md_end(md); | |
955 | for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) { | |
956 | check_md = q; | |
957 | if (!efi_wb(check_md)) | |
958 | break; | |
959 | if (contig_high != check_md->phys_addr) | |
960 | break; | |
961 | contig_high = efi_md_end(check_md); | |
962 | } | |
963 | contig_high = GRANULEROUNDDOWN(contig_high); | |
964 | } | |
965 | if (!is_available_memory(md)) | |
966 | continue; | |
967 | ||
968 | /* | |
969 | * Round ends inward to granule boundaries | |
970 | * Give trimmings to uncached allocator | |
971 | */ | |
972 | if (md->phys_addr < contig_low) { | |
973 | lim = min(efi_md_end(md), contig_low); | |
974 | if (efi_uc(md)) { | |
975 | if (k > kern_memmap && (k-1)->attribute == EFI_MEMORY_UC && | |
976 | kmd_end(k-1) == md->phys_addr) { | |
977 | (k-1)->num_pages += (lim - md->phys_addr) >> EFI_PAGE_SHIFT; | |
978 | } else { | |
979 | k->attribute = EFI_MEMORY_UC; | |
980 | k->start = md->phys_addr; | |
981 | k->num_pages = (lim - md->phys_addr) >> EFI_PAGE_SHIFT; | |
982 | k++; | |
983 | } | |
984 | } | |
985 | as = contig_low; | |
986 | } else | |
987 | as = md->phys_addr; | |
988 | ||
989 | if (efi_md_end(md) > contig_high) { | |
990 | lim = max(md->phys_addr, contig_high); | |
991 | if (efi_uc(md)) { | |
992 | if (lim == md->phys_addr && k > kern_memmap && | |
993 | (k-1)->attribute == EFI_MEMORY_UC && | |
994 | kmd_end(k-1) == md->phys_addr) { | |
995 | (k-1)->num_pages += md->num_pages; | |
996 | } else { | |
997 | k->attribute = EFI_MEMORY_UC; | |
998 | k->start = lim; | |
999 | k->num_pages = (efi_md_end(md) - lim) >> EFI_PAGE_SHIFT; | |
1000 | k++; | |
1001 | } | |
1002 | } | |
1003 | ae = contig_high; | |
1004 | } else | |
1005 | ae = efi_md_end(md); | |
1006 | ||
1007 | /* keep within max_addr= command line arg */ | |
1008 | ae = min(ae, max_addr); | |
1009 | if (ae <= as) | |
1010 | continue; | |
1011 | ||
1012 | /* avoid going over mem= command line arg */ | |
1013 | if (total_mem + (ae - as) > mem_limit) | |
1014 | ae -= total_mem + (ae - as) - mem_limit; | |
1015 | ||
1016 | if (ae <= as) | |
1017 | continue; | |
1018 | if (prev && kmd_end(prev) == md->phys_addr) { | |
1019 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; | |
1020 | total_mem += ae - as; | |
1021 | continue; | |
1022 | } | |
1023 | k->attribute = EFI_MEMORY_WB; | |
1024 | k->start = as; | |
1025 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; | |
1026 | total_mem += ae - as; | |
1027 | prev = k++; | |
1028 | } | |
1029 | k->start = ~0L; /* end-marker */ | |
1030 | ||
1031 | /* reserve the memory we are using for kern_memmap */ | |
1032 | *s = (u64)kern_memmap; | |
1033 | *e = (u64)++k; | |
1034 | } | |
be379124 KA |
1035 | |
1036 | void | |
1037 | efi_initialize_iomem_resources(struct resource *code_resource, | |
1038 | struct resource *data_resource) | |
1039 | { | |
1040 | struct resource *res; | |
1041 | void *efi_map_start, *efi_map_end, *p; | |
1042 | efi_memory_desc_t *md; | |
1043 | u64 efi_desc_size; | |
1044 | char *name; | |
1045 | unsigned long flags; | |
1046 | ||
1047 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1048 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1049 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1050 | ||
1051 | res = NULL; | |
1052 | ||
1053 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1054 | md = p; | |
1055 | ||
1056 | if (md->num_pages == 0) /* should not happen */ | |
1057 | continue; | |
1058 | ||
1059 | flags = IORESOURCE_MEM; | |
1060 | switch (md->type) { | |
1061 | ||
1062 | case EFI_MEMORY_MAPPED_IO: | |
1063 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1064 | continue; | |
1065 | ||
1066 | case EFI_LOADER_CODE: | |
1067 | case EFI_LOADER_DATA: | |
1068 | case EFI_BOOT_SERVICES_DATA: | |
1069 | case EFI_BOOT_SERVICES_CODE: | |
1070 | case EFI_CONVENTIONAL_MEMORY: | |
1071 | if (md->attribute & EFI_MEMORY_WP) { | |
1072 | name = "System ROM"; | |
1073 | flags |= IORESOURCE_READONLY; | |
1074 | } else { | |
1075 | name = "System RAM"; | |
1076 | } | |
1077 | break; | |
1078 | ||
1079 | case EFI_ACPI_MEMORY_NVS: | |
1080 | name = "ACPI Non-volatile Storage"; | |
1081 | flags |= IORESOURCE_BUSY; | |
1082 | break; | |
1083 | ||
1084 | case EFI_UNUSABLE_MEMORY: | |
1085 | name = "reserved"; | |
1086 | flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED; | |
1087 | break; | |
1088 | ||
1089 | case EFI_RESERVED_TYPE: | |
1090 | case EFI_RUNTIME_SERVICES_CODE: | |
1091 | case EFI_RUNTIME_SERVICES_DATA: | |
1092 | case EFI_ACPI_RECLAIM_MEMORY: | |
1093 | default: | |
1094 | name = "reserved"; | |
1095 | flags |= IORESOURCE_BUSY; | |
1096 | break; | |
1097 | } | |
1098 | ||
baf47fb6 | 1099 | if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) { |
be379124 KA |
1100 | printk(KERN_ERR "failed to alocate resource for iomem\n"); |
1101 | return; | |
1102 | } | |
1103 | ||
1104 | res->name = name; | |
1105 | res->start = md->phys_addr; | |
1106 | res->end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1; | |
1107 | res->flags = flags; | |
1108 | ||
1109 | if (insert_resource(&iomem_resource, res) < 0) | |
1110 | kfree(res); | |
1111 | else { | |
1112 | /* | |
1113 | * We don't know which region contains | |
1114 | * kernel data so we try it repeatedly and | |
1115 | * let the resource manager test it. | |
1116 | */ | |
1117 | insert_resource(res, code_resource); | |
1118 | insert_resource(res, data_resource); | |
1119 | } | |
1120 | } | |
1121 | } |