blob: 49b93682c75279956a98650696ec5adfd46554ad [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Bjorn Helgaas32e62c62006-05-05 17:19:50 -060011 * (c) Copyright 2006 Hewlett-Packard Development Company, L.P.
12 * Bjorn Helgaas <bjorn.helgaas@hp.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/module.h>
Hormsf4a57092007-03-06 02:34:21 -080024#include <linux/bootmem.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/kernel.h>
26#include <linux/init.h>
27#include <linux/types.h>
28#include <linux/time.h>
29#include <linux/efi.h>
Zou Nan haia79561132006-12-07 09:51:35 -080030#include <linux/kexec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32#include <asm/io.h>
33#include <asm/kregs.h>
34#include <asm/meminit.h>
35#include <asm/pgtable.h>
36#include <asm/processor.h>
37#include <asm/mca.h>
38
39#define EFI_DEBUG 0
40
41extern efi_status_t efi_call_phys (void *, ...);
42
43struct efi efi;
44EXPORT_SYMBOL(efi);
45static efi_runtime_services_t *runtime;
Zou Nan haia79561132006-12-07 09:51:35 -080046static unsigned long mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48#define efi_call_virt(f, args...) (*(f))(args)
49
50#define STUB_GET_TIME(prefix, adjust_arg) \
51static efi_status_t \
52prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \
53{ \
54 struct ia64_fpreg fr[6]; \
55 efi_time_cap_t *atc = NULL; \
56 efi_status_t ret; \
57 \
58 if (tc) \
59 atc = adjust_arg(tc); \
60 ia64_save_scratch_fpregs(fr); \
61 ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), adjust_arg(tm), atc); \
62 ia64_load_scratch_fpregs(fr); \
63 return ret; \
64}
65
66#define STUB_SET_TIME(prefix, adjust_arg) \
67static efi_status_t \
68prefix##_set_time (efi_time_t *tm) \
69{ \
70 struct ia64_fpreg fr[6]; \
71 efi_status_t ret; \
72 \
73 ia64_save_scratch_fpregs(fr); \
74 ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), adjust_arg(tm)); \
75 ia64_load_scratch_fpregs(fr); \
76 return ret; \
77}
78
79#define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \
80static efi_status_t \
81prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, 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_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \
88 adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \
89 ia64_load_scratch_fpregs(fr); \
90 return ret; \
91}
92
93#define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \
94static efi_status_t \
95prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \
96{ \
97 struct ia64_fpreg fr[6]; \
98 efi_time_t *atm = NULL; \
99 efi_status_t ret; \
100 \
101 if (tm) \
102 atm = adjust_arg(tm); \
103 ia64_save_scratch_fpregs(fr); \
104 ret = efi_call_##prefix((efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \
105 enabled, atm); \
106 ia64_load_scratch_fpregs(fr); \
107 return ret; \
108}
109
110#define STUB_GET_VARIABLE(prefix, adjust_arg) \
111static efi_status_t \
112prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \
113 unsigned long *data_size, void *data) \
114{ \
115 struct ia64_fpreg fr[6]; \
116 u32 *aattr = NULL; \
117 efi_status_t ret; \
118 \
119 if (attr) \
120 aattr = adjust_arg(attr); \
121 ia64_save_scratch_fpregs(fr); \
122 ret = efi_call_##prefix((efi_get_variable_t *) __va(runtime->get_variable), \
123 adjust_arg(name), adjust_arg(vendor), aattr, \
124 adjust_arg(data_size), adjust_arg(data)); \
125 ia64_load_scratch_fpregs(fr); \
126 return ret; \
127}
128
129#define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \
130static efi_status_t \
131prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor) \
132{ \
133 struct ia64_fpreg fr[6]; \
134 efi_status_t ret; \
135 \
136 ia64_save_scratch_fpregs(fr); \
137 ret = efi_call_##prefix((efi_get_next_variable_t *) __va(runtime->get_next_variable), \
138 adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \
139 ia64_load_scratch_fpregs(fr); \
140 return ret; \
141}
142
143#define STUB_SET_VARIABLE(prefix, adjust_arg) \
144static efi_status_t \
145prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, unsigned long attr, \
146 unsigned long data_size, void *data) \
147{ \
148 struct ia64_fpreg fr[6]; \
149 efi_status_t ret; \
150 \
151 ia64_save_scratch_fpregs(fr); \
152 ret = efi_call_##prefix((efi_set_variable_t *) __va(runtime->set_variable), \
153 adjust_arg(name), adjust_arg(vendor), attr, data_size, \
154 adjust_arg(data)); \
155 ia64_load_scratch_fpregs(fr); \
156 return ret; \
157}
158
159#define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \
160static efi_status_t \
161prefix##_get_next_high_mono_count (u32 *count) \
162{ \
163 struct ia64_fpreg fr[6]; \
164 efi_status_t ret; \
165 \
166 ia64_save_scratch_fpregs(fr); \
167 ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \
168 __va(runtime->get_next_high_mono_count), adjust_arg(count)); \
169 ia64_load_scratch_fpregs(fr); \
170 return ret; \
171}
172
173#define STUB_RESET_SYSTEM(prefix, adjust_arg) \
174static void \
175prefix##_reset_system (int reset_type, efi_status_t status, \
176 unsigned long data_size, efi_char16_t *data) \
177{ \
178 struct ia64_fpreg fr[6]; \
179 efi_char16_t *adata = NULL; \
180 \
181 if (data) \
182 adata = adjust_arg(data); \
183 \
184 ia64_save_scratch_fpregs(fr); \
185 efi_call_##prefix((efi_reset_system_t *) __va(runtime->reset_system), \
186 reset_type, status, data_size, adata); \
187 /* should not return, but just in case... */ \
188 ia64_load_scratch_fpregs(fr); \
189}
190
191#define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg))
192
193STUB_GET_TIME(phys, phys_ptr)
194STUB_SET_TIME(phys, phys_ptr)
195STUB_GET_WAKEUP_TIME(phys, phys_ptr)
196STUB_SET_WAKEUP_TIME(phys, phys_ptr)
197STUB_GET_VARIABLE(phys, phys_ptr)
198STUB_GET_NEXT_VARIABLE(phys, phys_ptr)
199STUB_SET_VARIABLE(phys, phys_ptr)
200STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr)
201STUB_RESET_SYSTEM(phys, phys_ptr)
202
203#define id(arg) arg
204
205STUB_GET_TIME(virt, id)
206STUB_SET_TIME(virt, id)
207STUB_GET_WAKEUP_TIME(virt, id)
208STUB_SET_WAKEUP_TIME(virt, id)
209STUB_GET_VARIABLE(virt, id)
210STUB_GET_NEXT_VARIABLE(virt, id)
211STUB_SET_VARIABLE(virt, id)
212STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id)
213STUB_RESET_SYSTEM(virt, id)
214
215void
216efi_gettimeofday (struct timespec *ts)
217{
218 efi_time_t tm;
219
220 memset(ts, 0, sizeof(ts));
221 if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS)
222 return;
223
224 ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
225 ts->tv_nsec = tm.nanosecond;
226}
227
228static int
Christoph Lameter66888a62006-12-04 14:58:35 -0800229is_memory_available (efi_memory_desc_t *md)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
231 if (!(md->attribute & EFI_MEMORY_WB))
232 return 0;
233
234 switch (md->type) {
235 case EFI_LOADER_CODE:
236 case EFI_LOADER_DATA:
237 case EFI_BOOT_SERVICES_CODE:
238 case EFI_BOOT_SERVICES_DATA:
239 case EFI_CONVENTIONAL_MEMORY:
240 return 1;
241 }
242 return 0;
243}
244
Tony Luckd8c97d52005-09-08 12:39:59 -0700245typedef struct kern_memdesc {
246 u64 attribute;
247 u64 start;
248 u64 num_pages;
249} kern_memdesc_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Tony Luckd8c97d52005-09-08 12:39:59 -0700251static kern_memdesc_t *kern_memmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800253#define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT)
254
255static inline u64
256kmd_end(kern_memdesc_t *kmd)
257{
258 return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT));
259}
260
261static inline u64
262efi_md_end(efi_memory_desc_t *md)
263{
264 return (md->phys_addr + efi_md_size(md));
265}
266
267static inline int
268efi_wb(efi_memory_desc_t *md)
269{
270 return (md->attribute & EFI_MEMORY_WB);
271}
272
273static inline int
274efi_uc(efi_memory_desc_t *md)
275{
276 return (md->attribute & EFI_MEMORY_UC);
277}
278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279static void
Tony Luckd8c97d52005-09-08 12:39:59 -0700280walk (efi_freemem_callback_t callback, void *arg, u64 attr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281{
Tony Luckd8c97d52005-09-08 12:39:59 -0700282 kern_memdesc_t *k;
283 u64 start, end, voff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Tony Luckd8c97d52005-09-08 12:39:59 -0700285 voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET;
286 for (k = kern_memmap; k->start != ~0UL; k++) {
287 if (k->attribute != attr)
288 continue;
289 start = PAGE_ALIGN(k->start);
290 end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK;
291 if (start < end)
292 if ((*callback)(start + voff, end + voff, arg) < 0)
293 return;
294 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295}
296
297/*
298 * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that
299 * has memory that is available for OS use.
300 */
301void
302efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
303{
Tony Luckd8c97d52005-09-08 12:39:59 -0700304 walk(callback, arg, EFI_MEMORY_WB);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305}
306
307/*
Tony Luckd8c97d52005-09-08 12:39:59 -0700308 * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that
309 * has memory that is available for uncached allocator.
Jes Sorensenf14f75b2005-06-21 17:15:02 -0700310 */
Tony Luckd8c97d52005-09-08 12:39:59 -0700311void
312efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg)
Jes Sorensenf14f75b2005-06-21 17:15:02 -0700313{
Tony Luckd8c97d52005-09-08 12:39:59 -0700314 walk(callback, arg, EFI_MEMORY_UC);
Jes Sorensenf14f75b2005-06-21 17:15:02 -0700315}
316
Jes Sorensenf14f75b2005-06-21 17:15:02 -0700317/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 * Look for the PAL_CODE region reported by EFI and maps it using an
319 * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor
320 * Abstraction Layer chapter 11 in ADAG
321 */
322
323void *
324efi_get_pal_addr (void)
325{
326 void *efi_map_start, *efi_map_end, *p;
327 efi_memory_desc_t *md;
328 u64 efi_desc_size;
329 int pal_code_count = 0;
330 u64 vaddr, mask;
331
332 efi_map_start = __va(ia64_boot_param->efi_memmap);
333 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
334 efi_desc_size = ia64_boot_param->efi_memdesc_size;
335
336 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
337 md = p;
338 if (md->type != EFI_PAL_CODE)
339 continue;
340
341 if (++pal_code_count > 1) {
342 printk(KERN_ERR "Too many EFI Pal Code memory ranges, dropped @ %lx\n",
343 md->phys_addr);
344 continue;
345 }
346 /*
347 * The only ITLB entry in region 7 that is used is the one installed by
348 * __start(). That entry covers a 64MB range.
349 */
350 mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
351 vaddr = PAGE_OFFSET + md->phys_addr;
352
353 /*
354 * We must check that the PAL mapping won't overlap with the kernel
355 * mapping.
356 *
357 * PAL code is guaranteed to be aligned on a power of 2 between 4k and
358 * 256KB and that only one ITR is needed to map it. This implies that the
359 * PAL code is always aligned on its size, i.e., the closest matching page
360 * size supported by the TLB. Therefore PAL code is guaranteed never to
361 * cross a 64MB unless it is bigger than 64MB (very unlikely!). So for
362 * now the following test is enough to determine whether or not we need a
363 * dedicated ITR for the PAL code.
364 */
365 if ((vaddr & mask) == (KERNEL_START & mask)) {
366 printk(KERN_INFO "%s: no need to install ITR for PAL code\n",
367 __FUNCTION__);
368 continue;
369 }
370
371 if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE)
372 panic("Woah! PAL code size bigger than a granule!");
373
374#if EFI_DEBUG
375 mask = ~((1 << IA64_GRANULE_SHIFT) - 1);
376
377 printk(KERN_INFO "CPU %d: mapping PAL code [0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
378 smp_processor_id(), md->phys_addr,
379 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
380 vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
381#endif
382 return __va(md->phys_addr);
383 }
Horms94732522007-02-05 10:17:38 +0900384 printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 __FUNCTION__);
386 return NULL;
387}
388
389void
390efi_map_pal_code (void)
391{
392 void *pal_vaddr = efi_get_pal_addr ();
393 u64 psr;
394
395 if (!pal_vaddr)
396 return;
397
398 /*
399 * Cannot write to CRx with PSR.ic=1
400 */
401 psr = ia64_clear_ic();
402 ia64_itr(0x1, IA64_TR_PALCODE, GRANULEROUNDDOWN((unsigned long) pal_vaddr),
403 pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)),
404 IA64_GRANULE_SHIFT);
405 ia64_set_psr(psr); /* restore psr */
406 ia64_srlz_i();
407}
408
409void __init
410efi_init (void)
411{
412 void *efi_map_start, *efi_map_end;
413 efi_config_table_t *config_tables;
414 efi_char16_t *c16;
415 u64 efi_desc_size;
Zou Nan hai9d78f432006-02-07 11:35:46 +0800416 char *cp, vendor[100] = "unknown";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 int i;
418
419 /* it's too early to be able to use the standard kernel command line support... */
Alon Bar-Leva8d91b82007-02-12 00:54:12 -0800420 for (cp = boot_command_line; *cp; ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (memcmp(cp, "mem=", 4) == 0) {
Zou Nan hai9d78f432006-02-07 11:35:46 +0800422 mem_limit = memparse(cp + 4, &cp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 } else if (memcmp(cp, "max_addr=", 9) == 0) {
Zou Nan hai9d78f432006-02-07 11:35:46 +0800424 max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
Zou Nan haia79561132006-12-07 09:51:35 -0800425 } else if (memcmp(cp, "min_addr=", 9) == 0) {
426 min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 } else {
428 while (*cp != ' ' && *cp)
429 ++cp;
430 while (*cp == ' ')
431 ++cp;
432 }
433 }
Zou Nan haia79561132006-12-07 09:51:35 -0800434 if (min_addr != 0UL)
435 printk(KERN_INFO "Ignoring memory below %luMB\n", min_addr >> 20);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 if (max_addr != ~0UL)
437 printk(KERN_INFO "Ignoring memory above %luMB\n", max_addr >> 20);
438
439 efi.systab = __va(ia64_boot_param->efi_systab);
440
441 /*
442 * Verify the EFI Table
443 */
444 if (efi.systab == NULL)
445 panic("Woah! Can't find EFI system table.\n");
446 if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
447 panic("Woah! EFI system table signature incorrect\n");
448 if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0)
449 printk(KERN_WARNING "Warning: EFI system table major version mismatch: "
450 "got %d.%02d, expected %d.%02d\n",
451 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff,
452 EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff);
453
454 config_tables = __va(efi.systab->tables);
455
456 /* Show what we know for posterity */
457 c16 = __va(efi.systab->fw_vendor);
458 if (c16) {
Zou Nan haiecdd5da2006-02-07 11:25:55 +0800459 for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 vendor[i] = *c16++;
461 vendor[i] = '\0';
462 }
463
464 printk(KERN_INFO "EFI v%u.%.02u by %s:",
465 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor);
466
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800467 efi.mps = EFI_INVALID_TABLE_ADDR;
468 efi.acpi = EFI_INVALID_TABLE_ADDR;
469 efi.acpi20 = EFI_INVALID_TABLE_ADDR;
470 efi.smbios = EFI_INVALID_TABLE_ADDR;
471 efi.sal_systab = EFI_INVALID_TABLE_ADDR;
472 efi.boot_info = EFI_INVALID_TABLE_ADDR;
473 efi.hcdp = EFI_INVALID_TABLE_ADDR;
474 efi.uga = EFI_INVALID_TABLE_ADDR;
475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 for (i = 0; i < (int) efi.systab->nr_tables; i++) {
477 if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800478 efi.mps = config_tables[i].table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 printk(" MPS=0x%lx", config_tables[i].table);
480 } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800481 efi.acpi20 = config_tables[i].table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 printk(" ACPI 2.0=0x%lx", config_tables[i].table);
483 } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800484 efi.acpi = config_tables[i].table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 printk(" ACPI=0x%lx", config_tables[i].table);
486 } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800487 efi.smbios = config_tables[i].table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 printk(" SMBIOS=0x%lx", config_tables[i].table);
489 } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800490 efi.sal_systab = config_tables[i].table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 printk(" SALsystab=0x%lx", config_tables[i].table);
492 } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800493 efi.hcdp = config_tables[i].table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 printk(" HCDP=0x%lx", config_tables[i].table);
495 }
496 }
497 printk("\n");
498
499 runtime = __va(efi.systab->runtime);
500 efi.get_time = phys_get_time;
501 efi.set_time = phys_set_time;
502 efi.get_wakeup_time = phys_get_wakeup_time;
503 efi.set_wakeup_time = phys_set_wakeup_time;
504 efi.get_variable = phys_get_variable;
505 efi.get_next_variable = phys_get_next_variable;
506 efi.set_variable = phys_set_variable;
507 efi.get_next_high_mono_count = phys_get_next_high_mono_count;
508 efi.reset_system = phys_reset_system;
509
510 efi_map_start = __va(ia64_boot_param->efi_memmap);
511 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
512 efi_desc_size = ia64_boot_param->efi_memdesc_size;
513
514#if EFI_DEBUG
515 /* print EFI memory map: */
516 {
517 efi_memory_desc_t *md;
518 void *p;
519
520 for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) {
521 md = p;
522 printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n",
523 i, md->type, md->attribute, md->phys_addr,
524 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
525 md->num_pages >> (20 - EFI_PAGE_SHIFT));
526 }
527 }
528#endif
529
530 efi_map_pal_code();
531 efi_enter_virtual_mode();
532}
533
534void
535efi_enter_virtual_mode (void)
536{
537 void *efi_map_start, *efi_map_end, *p;
538 efi_memory_desc_t *md;
539 efi_status_t status;
540 u64 efi_desc_size;
541
542 efi_map_start = __va(ia64_boot_param->efi_memmap);
543 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
544 efi_desc_size = ia64_boot_param->efi_memdesc_size;
545
546 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
547 md = p;
548 if (md->attribute & EFI_MEMORY_RUNTIME) {
549 /*
550 * Some descriptors have multiple bits set, so the order of
551 * the tests is relevant.
552 */
553 if (md->attribute & EFI_MEMORY_WB) {
554 md->virt_addr = (u64) __va(md->phys_addr);
555 } else if (md->attribute & EFI_MEMORY_UC) {
556 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
557 } else if (md->attribute & EFI_MEMORY_WC) {
558#if 0
559 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
560 | _PAGE_D
561 | _PAGE_MA_WC
562 | _PAGE_PL_0
563 | _PAGE_AR_RW));
564#else
565 printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
566 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
567#endif
568 } else if (md->attribute & EFI_MEMORY_WT) {
569#if 0
570 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
571 | _PAGE_D | _PAGE_MA_WT
572 | _PAGE_PL_0
573 | _PAGE_AR_RW));
574#else
575 printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
576 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
577#endif
578 }
579 }
580 }
581
582 status = efi_call_phys(__va(runtime->set_virtual_address_map),
583 ia64_boot_param->efi_memmap_size,
584 efi_desc_size, ia64_boot_param->efi_memdesc_version,
585 ia64_boot_param->efi_memmap);
586 if (status != EFI_SUCCESS) {
587 printk(KERN_WARNING "warning: unable to switch EFI into virtual mode "
588 "(status=%lu)\n", status);
589 return;
590 }
591
592 /*
593 * Now that EFI is in virtual mode, we call the EFI functions more efficiently:
594 */
595 efi.get_time = virt_get_time;
596 efi.set_time = virt_set_time;
597 efi.get_wakeup_time = virt_get_wakeup_time;
598 efi.set_wakeup_time = virt_set_wakeup_time;
599 efi.get_variable = virt_get_variable;
600 efi.get_next_variable = virt_get_next_variable;
601 efi.set_variable = virt_set_variable;
602 efi.get_next_high_mono_count = virt_get_next_high_mono_count;
603 efi.reset_system = virt_reset_system;
604}
605
606/*
607 * Walk the EFI memory map looking for the I/O port range. There can only be one entry of
608 * this type, other I/O port ranges should be described via ACPI.
609 */
610u64
611efi_get_iobase (void)
612{
613 void *efi_map_start, *efi_map_end, *p;
614 efi_memory_desc_t *md;
615 u64 efi_desc_size;
616
617 efi_map_start = __va(ia64_boot_param->efi_memmap);
618 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
619 efi_desc_size = ia64_boot_param->efi_memdesc_size;
620
621 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
622 md = p;
623 if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
624 if (md->attribute & EFI_MEMORY_UC)
625 return md->phys_addr;
626 }
627 }
628 return 0;
629}
630
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600631static struct kern_memdesc *
632kern_memory_descriptor (unsigned long phys_addr)
633{
634 struct kern_memdesc *md;
635
636 for (md = kern_memmap; md->start != ~0UL; md++) {
637 if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT))
638 return md;
639 }
Keith Owense037cda2006-07-17 15:41:59 +1000640 return NULL;
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600641}
642
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800643static efi_memory_desc_t *
644efi_memory_descriptor (unsigned long phys_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645{
646 void *efi_map_start, *efi_map_end, *p;
647 efi_memory_desc_t *md;
648 u64 efi_desc_size;
649
650 efi_map_start = __va(ia64_boot_param->efi_memmap);
651 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
652 efi_desc_size = ia64_boot_param->efi_memdesc_size;
653
654 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
655 md = p;
656
657 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800658 return md;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 }
Keith Owense037cda2006-07-17 15:41:59 +1000660 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661}
662
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800663u32
664efi_mem_type (unsigned long phys_addr)
665{
666 efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
667
668 if (md)
669 return md->type;
670 return 0;
671}
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673u64
674efi_mem_attributes (unsigned long phys_addr)
675{
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800676 efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800678 if (md)
679 return md->attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 return 0;
681}
682EXPORT_SYMBOL(efi_mem_attributes);
683
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600684u64
685efi_mem_attribute (unsigned long phys_addr, unsigned long size)
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800686{
Bjorn Helgaas136939a2006-03-26 01:37:05 -0800687 unsigned long end = phys_addr + size;
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800688 efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600689 u64 attr;
690
691 if (!md)
692 return 0;
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800693
Bjorn Helgaas136939a2006-03-26 01:37:05 -0800694 /*
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600695 * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells
696 * the kernel that firmware needs this region mapped.
Bjorn Helgaas136939a2006-03-26 01:37:05 -0800697 */
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600698 attr = md->attribute & ~EFI_MEMORY_RUNTIME;
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800699 do {
Bjorn Helgaas136939a2006-03-26 01:37:05 -0800700 unsigned long md_end = efi_md_end(md);
701
702 if (end <= md_end)
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600703 return attr;
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800704
705 md = efi_memory_descriptor(md_end);
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600706 if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr)
Bjorn Helgaas136939a2006-03-26 01:37:05 -0800707 return 0;
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800708 } while (md);
709 return 0;
710}
711
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600712u64
713kern_mem_attribute (unsigned long phys_addr, unsigned long size)
714{
715 unsigned long end = phys_addr + size;
716 struct kern_memdesc *md;
717 u64 attr;
718
719 /*
720 * This is a hack for ioremap calls before we set up kern_memmap.
721 * Maybe we should do efi_memmap_init() earlier instead.
722 */
723 if (!kern_memmap) {
724 attr = efi_mem_attribute(phys_addr, size);
725 if (attr & EFI_MEMORY_WB)
726 return EFI_MEMORY_WB;
727 return 0;
728 }
729
730 md = kern_memory_descriptor(phys_addr);
731 if (!md)
732 return 0;
733
734 attr = md->attribute;
735 do {
736 unsigned long md_end = kmd_end(md);
737
738 if (end <= md_end)
739 return attr;
740
741 md = kern_memory_descriptor(md_end);
742 if (!md || md->attribute != attr)
743 return 0;
744 } while (md);
745 return 0;
746}
747EXPORT_SYMBOL(kern_mem_attribute);
748
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749int
Bjorn Helgaas136939a2006-03-26 01:37:05 -0800750valid_phys_addr_range (unsigned long phys_addr, unsigned long size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751{
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600752 u64 attr;
753
754 /*
755 * /dev/mem reads and writes use copy_to_user(), which implicitly
756 * uses a granule-sized kernel identity mapping. It's really
757 * only safe to do this for regions in kern_memmap. For more
758 * details, see Documentation/ia64/aliasing.txt.
759 */
760 attr = kern_mem_attribute(phys_addr, size);
761 if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
762 return 1;
763 return 0;
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800764}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800766int
Lennert Buytenhek06c67be2006-07-10 04:45:27 -0700767valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size)
Bjorn Helgaas80851ef2006-01-08 01:04:13 -0800768{
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600769 /*
770 * MMIO regions are often missing from the EFI memory map.
771 * We must allow mmap of them for programs like X, so we
772 * currently can't do any useful validation.
773 */
774 return 1;
775}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600777pgprot_t
778phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size,
779 pgprot_t vma_prot)
780{
781 unsigned long phys_addr = pfn << PAGE_SHIFT;
782 u64 attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Bjorn Helgaas32e62c62006-05-05 17:19:50 -0600784 /*
785 * For /dev/mem mmap, we use user mappings, but if the region is
786 * in kern_memmap (and hence may be covered by a kernel mapping),
787 * we must use the same attribute as the kernel mapping.
788 */
789 attr = kern_mem_attribute(phys_addr, size);
790 if (attr & EFI_MEMORY_WB)
791 return pgprot_cacheable(vma_prot);
792 else if (attr & EFI_MEMORY_UC)
793 return pgprot_noncached(vma_prot);
794
795 /*
796 * Some chipsets don't support UC access to memory. If
797 * WB is supported, we prefer that.
798 */
799 if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB)
800 return pgprot_cacheable(vma_prot);
801
802 return pgprot_noncached(vma_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803}
804
805int __init
806efi_uart_console_only(void)
807{
808 efi_status_t status;
809 char *s, name[] = "ConOut";
810 efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID;
811 efi_char16_t *utf16, name_utf16[32];
812 unsigned char data[1024];
813 unsigned long size = sizeof(data);
814 struct efi_generic_dev_path *hdr, *end_addr;
815 int uart = 0;
816
817 /* Convert to UTF-16 */
818 utf16 = name_utf16;
819 s = name;
820 while (*s)
821 *utf16++ = *s++ & 0x7f;
822 *utf16 = 0;
823
824 status = efi.get_variable(name_utf16, &guid, NULL, &size, data);
825 if (status != EFI_SUCCESS) {
826 printk(KERN_ERR "No EFI %s variable?\n", name);
827 return 0;
828 }
829
830 hdr = (struct efi_generic_dev_path *) data;
831 end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size);
832 while (hdr < end_addr) {
833 if (hdr->type == EFI_DEV_MSG &&
834 hdr->sub_type == EFI_DEV_MSG_UART)
835 uart = 1;
836 else if (hdr->type == EFI_DEV_END_PATH ||
837 hdr->type == EFI_DEV_END_PATH2) {
838 if (!uart)
839 return 0;
840 if (hdr->sub_type == EFI_DEV_END_ENTIRE)
841 return 1;
842 uart = 0;
843 }
844 hdr = (struct efi_generic_dev_path *) ((u8 *) hdr + hdr->length);
845 }
846 printk(KERN_ERR "Malformed %s value\n", name);
847 return 0;
848}
Tony Luckd8c97d52005-09-08 12:39:59 -0700849
Tony Luckd8c97d52005-09-08 12:39:59 -0700850/*
851 * Look for the first granule aligned memory descriptor memory
852 * that is big enough to hold EFI memory map. Make sure this
853 * descriptor is atleast granule sized so it does not get trimmed
854 */
855struct kern_memdesc *
856find_memmap_space (void)
857{
858 u64 contig_low=0, contig_high=0;
859 u64 as = 0, ae;
860 void *efi_map_start, *efi_map_end, *p, *q;
861 efi_memory_desc_t *md, *pmd = NULL, *check_md;
862 u64 space_needed, efi_desc_size;
863 unsigned long total_mem = 0;
864
865 efi_map_start = __va(ia64_boot_param->efi_memmap);
866 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
867 efi_desc_size = ia64_boot_param->efi_memdesc_size;
868
869 /*
870 * Worst case: we need 3 kernel descriptors for each efi descriptor
871 * (if every entry has a WB part in the middle, and UC head and tail),
872 * plus one for the end marker.
873 */
874 space_needed = sizeof(kern_memdesc_t) *
875 (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1);
876
877 for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
878 md = p;
879 if (!efi_wb(md)) {
880 continue;
881 }
882 if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) {
883 contig_low = GRANULEROUNDUP(md->phys_addr);
884 contig_high = efi_md_end(md);
885 for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) {
886 check_md = q;
887 if (!efi_wb(check_md))
888 break;
889 if (contig_high != check_md->phys_addr)
890 break;
891 contig_high = efi_md_end(check_md);
892 }
893 contig_high = GRANULEROUNDDOWN(contig_high);
894 }
Christoph Lameter66888a62006-12-04 14:58:35 -0800895 if (!is_memory_available(md) || md->type == EFI_LOADER_DATA)
Tony Luckd8c97d52005-09-08 12:39:59 -0700896 continue;
897
898 /* Round ends inward to granule boundaries */
899 as = max(contig_low, md->phys_addr);
900 ae = min(contig_high, efi_md_end(md));
901
Zou Nan haia79561132006-12-07 09:51:35 -0800902 /* keep within max_addr= and min_addr= command line arg */
903 as = max(as, min_addr);
Tony Luckd8c97d52005-09-08 12:39:59 -0700904 ae = min(ae, max_addr);
905 if (ae <= as)
906 continue;
907
908 /* avoid going over mem= command line arg */
909 if (total_mem + (ae - as) > mem_limit)
910 ae -= total_mem + (ae - as) - mem_limit;
911
912 if (ae <= as)
913 continue;
914
915 if (ae - as > space_needed)
916 break;
917 }
918 if (p >= efi_map_end)
919 panic("Can't allocate space for kernel memory descriptors");
920
921 return __va(as);
922}
923
924/*
925 * Walk the EFI memory map and gather all memory available for kernel
926 * to use. We can allocate partial granules only if the unavailable
927 * parts exist, and are WB.
928 */
929void
930efi_memmap_init(unsigned long *s, unsigned long *e)
931{
Keith Owense037cda2006-07-17 15:41:59 +1000932 struct kern_memdesc *k, *prev = NULL;
Tony Luckd8c97d52005-09-08 12:39:59 -0700933 u64 contig_low=0, contig_high=0;
934 u64 as, ae, lim;
935 void *efi_map_start, *efi_map_end, *p, *q;
936 efi_memory_desc_t *md, *pmd = NULL, *check_md;
937 u64 efi_desc_size;
938 unsigned long total_mem = 0;
939
940 k = kern_memmap = find_memmap_space();
941
942 efi_map_start = __va(ia64_boot_param->efi_memmap);
943 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
944 efi_desc_size = ia64_boot_param->efi_memdesc_size;
945
946 for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
947 md = p;
948 if (!efi_wb(md)) {
949 if (efi_uc(md) && (md->type == EFI_CONVENTIONAL_MEMORY ||
950 md->type == EFI_BOOT_SERVICES_DATA)) {
951 k->attribute = EFI_MEMORY_UC;
952 k->start = md->phys_addr;
953 k->num_pages = md->num_pages;
954 k++;
955 }
956 continue;
957 }
958 if (pmd == NULL || !efi_wb(pmd) || efi_md_end(pmd) != md->phys_addr) {
959 contig_low = GRANULEROUNDUP(md->phys_addr);
960 contig_high = efi_md_end(md);
961 for (q = p + efi_desc_size; q < efi_map_end; q += efi_desc_size) {
962 check_md = q;
963 if (!efi_wb(check_md))
964 break;
965 if (contig_high != check_md->phys_addr)
966 break;
967 contig_high = efi_md_end(check_md);
968 }
969 contig_high = GRANULEROUNDDOWN(contig_high);
970 }
Christoph Lameter66888a62006-12-04 14:58:35 -0800971 if (!is_memory_available(md))
Tony Luckd8c97d52005-09-08 12:39:59 -0700972 continue;
973
Tony Lucke55fdf12007-03-07 16:13:25 -0800974#ifdef CONFIG_CRASH_DUMP
975 /* saved_max_pfn should ignore max_addr= command line arg */
976 if (saved_max_pfn < (efi_md_end(md) >> PAGE_SHIFT))
977 saved_max_pfn = (efi_md_end(md) >> PAGE_SHIFT);
978#endif
Tony Luckd8c97d52005-09-08 12:39:59 -0700979 /*
980 * Round ends inward to granule boundaries
981 * Give trimmings to uncached allocator
982 */
983 if (md->phys_addr < contig_low) {
984 lim = min(efi_md_end(md), contig_low);
985 if (efi_uc(md)) {
986 if (k > kern_memmap && (k-1)->attribute == EFI_MEMORY_UC &&
987 kmd_end(k-1) == md->phys_addr) {
988 (k-1)->num_pages += (lim - md->phys_addr) >> EFI_PAGE_SHIFT;
989 } else {
990 k->attribute = EFI_MEMORY_UC;
991 k->start = md->phys_addr;
992 k->num_pages = (lim - md->phys_addr) >> EFI_PAGE_SHIFT;
993 k++;
994 }
995 }
996 as = contig_low;
997 } else
998 as = md->phys_addr;
999
1000 if (efi_md_end(md) > contig_high) {
1001 lim = max(md->phys_addr, contig_high);
1002 if (efi_uc(md)) {
1003 if (lim == md->phys_addr && k > kern_memmap &&
1004 (k-1)->attribute == EFI_MEMORY_UC &&
1005 kmd_end(k-1) == md->phys_addr) {
1006 (k-1)->num_pages += md->num_pages;
1007 } else {
1008 k->attribute = EFI_MEMORY_UC;
1009 k->start = lim;
1010 k->num_pages = (efi_md_end(md) - lim) >> EFI_PAGE_SHIFT;
1011 k++;
1012 }
1013 }
1014 ae = contig_high;
1015 } else
1016 ae = efi_md_end(md);
1017
Zou Nan haia79561132006-12-07 09:51:35 -08001018 /* keep within max_addr= and min_addr= command line arg */
1019 as = max(as, min_addr);
Tony Luckd8c97d52005-09-08 12:39:59 -07001020 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 if (prev && kmd_end(prev) == md->phys_addr) {
1031 prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT;
1032 total_mem += ae - as;
1033 continue;
1034 }
1035 k->attribute = EFI_MEMORY_WB;
1036 k->start = as;
1037 k->num_pages = (ae - as) >> EFI_PAGE_SHIFT;
1038 total_mem += ae - as;
1039 prev = k++;
1040 }
1041 k->start = ~0L; /* end-marker */
1042
1043 /* reserve the memory we are using for kern_memmap */
1044 *s = (u64)kern_memmap;
1045 *e = (u64)++k;
1046}
Khalid Azizbe379122005-09-19 15:42:36 -07001047
1048void
1049efi_initialize_iomem_resources(struct resource *code_resource,
1050 struct resource *data_resource)
1051{
1052 struct resource *res;
1053 void *efi_map_start, *efi_map_end, *p;
1054 efi_memory_desc_t *md;
1055 u64 efi_desc_size;
1056 char *name;
1057 unsigned long flags;
1058
1059 efi_map_start = __va(ia64_boot_param->efi_memmap);
1060 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
1061 efi_desc_size = ia64_boot_param->efi_memdesc_size;
1062
1063 res = NULL;
1064
1065 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
1066 md = p;
1067
1068 if (md->num_pages == 0) /* should not happen */
1069 continue;
1070
1071 flags = IORESOURCE_MEM;
1072 switch (md->type) {
1073
1074 case EFI_MEMORY_MAPPED_IO:
1075 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1076 continue;
1077
1078 case EFI_LOADER_CODE:
1079 case EFI_LOADER_DATA:
1080 case EFI_BOOT_SERVICES_DATA:
1081 case EFI_BOOT_SERVICES_CODE:
1082 case EFI_CONVENTIONAL_MEMORY:
1083 if (md->attribute & EFI_MEMORY_WP) {
1084 name = "System ROM";
1085 flags |= IORESOURCE_READONLY;
1086 } else {
1087 name = "System RAM";
1088 }
1089 break;
1090
1091 case EFI_ACPI_MEMORY_NVS:
1092 name = "ACPI Non-volatile Storage";
1093 flags |= IORESOURCE_BUSY;
1094 break;
1095
1096 case EFI_UNUSABLE_MEMORY:
1097 name = "reserved";
1098 flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED;
1099 break;
1100
1101 case EFI_RESERVED_TYPE:
1102 case EFI_RUNTIME_SERVICES_CODE:
1103 case EFI_RUNTIME_SERVICES_DATA:
1104 case EFI_ACPI_RECLAIM_MEMORY:
1105 default:
1106 name = "reserved";
1107 flags |= IORESOURCE_BUSY;
1108 break;
1109 }
1110
Panagiotis Issarisbaf47fb2005-11-09 02:08:42 +01001111 if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
Khalid Azizbe379122005-09-19 15:42:36 -07001112 printk(KERN_ERR "failed to alocate resource for iomem\n");
1113 return;
1114 }
1115
1116 res->name = name;
1117 res->start = md->phys_addr;
1118 res->end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1;
1119 res->flags = flags;
1120
1121 if (insert_resource(&iomem_resource, res) < 0)
1122 kfree(res);
1123 else {
1124 /*
1125 * We don't know which region contains
1126 * kernel data so we try it repeatedly and
1127 * let the resource manager test it.
1128 */
1129 insert_resource(res, code_resource);
1130 insert_resource(res, data_resource);
Zou Nan haia79561132006-12-07 09:51:35 -08001131#ifdef CONFIG_KEXEC
1132 insert_resource(res, &efi_memmap_res);
1133 insert_resource(res, &boot_param_res);
1134 if (crashk_res.end > crashk_res.start)
1135 insert_resource(res, &crashk_res);
1136#endif
Khalid Azizbe379122005-09-19 15:42:36 -07001137 }
1138 }
1139}
Zou Nan haia79561132006-12-07 09:51:35 -08001140
1141#ifdef CONFIG_KEXEC
1142/* find a block of memory aligned to 64M exclude reserved regions
1143 rsvd_regions are sorted
1144 */
1145unsigned long
1146kdump_find_rsvd_region (unsigned long size,
1147 struct rsvd_region *r, int n)
1148{
1149 int i;
1150 u64 start, end;
1151 u64 alignment = 1UL << _PAGE_SIZE_64M;
1152 void *efi_map_start, *efi_map_end, *p;
1153 efi_memory_desc_t *md;
1154 u64 efi_desc_size;
1155
1156 efi_map_start = __va(ia64_boot_param->efi_memmap);
1157 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
1158 efi_desc_size = ia64_boot_param->efi_memdesc_size;
1159
1160 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
1161 md = p;
1162 if (!efi_wb(md))
1163 continue;
1164 start = ALIGN(md->phys_addr, alignment);
1165 end = efi_md_end(md);
1166 for (i = 0; i < n; i++) {
1167 if (__pa(r[i].start) >= start && __pa(r[i].end) < end) {
1168 if (__pa(r[i].start) > start + size)
1169 return start;
1170 start = ALIGN(__pa(r[i].end), alignment);
1171 if (i < n-1 && __pa(r[i+1].start) < start + size)
1172 continue;
1173 else
1174 break;
1175 }
1176 }
1177 if (end > start + size)
1178 return start;
1179 }
1180
1181 printk(KERN_WARNING "Cannot reserve 0x%lx byte of memory for crashdump\n",
1182 size);
1183 return ~0UL;
1184}
1185#endif
Magnus Dammcee87af2007-03-06 02:34:26 -08001186
1187#ifdef CONFIG_PROC_VMCORE
1188/* locate the size find a the descriptor at a certain address */
1189unsigned long
1190vmcore_find_descriptor_size (unsigned long address)
1191{
1192 void *efi_map_start, *efi_map_end, *p;
1193 efi_memory_desc_t *md;
1194 u64 efi_desc_size;
1195 unsigned long ret = 0;
1196
1197 efi_map_start = __va(ia64_boot_param->efi_memmap);
1198 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
1199 efi_desc_size = ia64_boot_param->efi_memdesc_size;
1200
1201 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
1202 md = p;
1203 if (efi_wb(md) && md->type == EFI_LOADER_DATA
1204 && md->phys_addr == address) {
1205 ret = efi_md_size(md);
1206 break;
1207 }
1208 }
1209
1210 if (ret == 0)
1211 printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n");
1212
1213 return ret;
1214}
1215#endif