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authorThomas Gleixner <tglx@linutronix.de>2010-10-16 04:19:54 -0400
committerThomas Gleixner <tglx@linutronix.de>2010-10-27 08:30:01 -0400
commitb17ed48040d9e8b6ae35bc492015bf0fe1c8bae4 (patch)
tree64c31f66a0fc65268d02b2cee14e7abd760121e9 /arch/x86/kernel
parent937f961a6539b0ac5ebf31472b90810bc1f02200 (diff)
x86: Move efi to platform
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Huang Ying <ying.huang@intel.com>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/Makefile1
-rw-r--r--arch/x86/kernel/efi.c613
-rw-r--r--arch/x86/kernel/efi_32.c112
-rw-r--r--arch/x86/kernel/efi_64.c114
-rw-r--r--arch/x86/kernel/efi_stub_32.S123
-rw-r--r--arch/x86/kernel/efi_stub_64.S116
6 files changed, 0 insertions, 1079 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index d9067d10c6af..b01c7b1ac1ba 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -81,7 +81,6 @@ obj-$(CONFIG_KEXEC) += relocate_kernel_$(BITS).o crash.o
81obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o 81obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o
82obj-$(CONFIG_KPROBES) += kprobes.o 82obj-$(CONFIG_KPROBES) += kprobes.o
83obj-$(CONFIG_MODULES) += module.o 83obj-$(CONFIG_MODULES) += module.o
84obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o
85obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o 84obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o
86obj-$(CONFIG_KGDB) += kgdb.o 85obj-$(CONFIG_KGDB) += kgdb.o
87obj-$(CONFIG_VM86) += vm86_32.o 86obj-$(CONFIG_VM86) += vm86_32.o
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
deleted file mode 100644
index 0fe27d7c6258..000000000000
--- a/arch/x86/kernel/efi.c
+++ /dev/null
@@ -1,613 +0,0 @@
1/*
2 * Common EFI (Extensible Firmware Interface) support functions
3 * Based on Extensible Firmware Interface Specification version 1.0
4 *
5 * Copyright (C) 1999 VA Linux Systems
6 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
7 * Copyright (C) 1999-2002 Hewlett-Packard Co.
8 * David Mosberger-Tang <davidm@hpl.hp.com>
9 * Stephane Eranian <eranian@hpl.hp.com>
10 * Copyright (C) 2005-2008 Intel Co.
11 * Fenghua Yu <fenghua.yu@intel.com>
12 * Bibo Mao <bibo.mao@intel.com>
13 * Chandramouli Narayanan <mouli@linux.intel.com>
14 * Huang Ying <ying.huang@intel.com>
15 *
16 * Copied from efi_32.c to eliminate the duplicated code between EFI
17 * 32/64 support code. --ying 2007-10-26
18 *
19 * All EFI Runtime Services are not implemented yet as EFI only
20 * supports physical mode addressing on SoftSDV. This is to be fixed
21 * in a future version. --drummond 1999-07-20
22 *
23 * Implemented EFI runtime services and virtual mode calls. --davidm
24 *
25 * Goutham Rao: <goutham.rao@intel.com>
26 * Skip non-WB memory and ignore empty memory ranges.
27 */
28
29#include <linux/kernel.h>
30#include <linux/init.h>
31#include <linux/efi.h>
32#include <linux/bootmem.h>
33#include <linux/memblock.h>
34#include <linux/spinlock.h>
35#include <linux/uaccess.h>
36#include <linux/time.h>
37#include <linux/io.h>
38#include <linux/reboot.h>
39#include <linux/bcd.h>
40
41#include <asm/setup.h>
42#include <asm/efi.h>
43#include <asm/time.h>
44#include <asm/cacheflush.h>
45#include <asm/tlbflush.h>
46#include <asm/x86_init.h>
47
48#define EFI_DEBUG 1
49#define PFX "EFI: "
50
51int efi_enabled;
52EXPORT_SYMBOL(efi_enabled);
53
54struct efi efi;
55EXPORT_SYMBOL(efi);
56
57struct efi_memory_map memmap;
58
59static struct efi efi_phys __initdata;
60static efi_system_table_t efi_systab __initdata;
61
62static int __init setup_noefi(char *arg)
63{
64 efi_enabled = 0;
65 return 0;
66}
67early_param("noefi", setup_noefi);
68
69int add_efi_memmap;
70EXPORT_SYMBOL(add_efi_memmap);
71
72static int __init setup_add_efi_memmap(char *arg)
73{
74 add_efi_memmap = 1;
75 return 0;
76}
77early_param("add_efi_memmap", setup_add_efi_memmap);
78
79
80static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
81{
82 return efi_call_virt2(get_time, tm, tc);
83}
84
85static efi_status_t virt_efi_set_time(efi_time_t *tm)
86{
87 return efi_call_virt1(set_time, tm);
88}
89
90static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled,
91 efi_bool_t *pending,
92 efi_time_t *tm)
93{
94 return efi_call_virt3(get_wakeup_time,
95 enabled, pending, tm);
96}
97
98static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
99{
100 return efi_call_virt2(set_wakeup_time,
101 enabled, tm);
102}
103
104static efi_status_t virt_efi_get_variable(efi_char16_t *name,
105 efi_guid_t *vendor,
106 u32 *attr,
107 unsigned long *data_size,
108 void *data)
109{
110 return efi_call_virt5(get_variable,
111 name, vendor, attr,
112 data_size, data);
113}
114
115static efi_status_t virt_efi_get_next_variable(unsigned long *name_size,
116 efi_char16_t *name,
117 efi_guid_t *vendor)
118{
119 return efi_call_virt3(get_next_variable,
120 name_size, name, vendor);
121}
122
123static efi_status_t virt_efi_set_variable(efi_char16_t *name,
124 efi_guid_t *vendor,
125 unsigned long attr,
126 unsigned long data_size,
127 void *data)
128{
129 return efi_call_virt5(set_variable,
130 name, vendor, attr,
131 data_size, data);
132}
133
134static efi_status_t virt_efi_get_next_high_mono_count(u32 *count)
135{
136 return efi_call_virt1(get_next_high_mono_count, count);
137}
138
139static void virt_efi_reset_system(int reset_type,
140 efi_status_t status,
141 unsigned long data_size,
142 efi_char16_t *data)
143{
144 efi_call_virt4(reset_system, reset_type, status,
145 data_size, data);
146}
147
148static efi_status_t virt_efi_set_virtual_address_map(
149 unsigned long memory_map_size,
150 unsigned long descriptor_size,
151 u32 descriptor_version,
152 efi_memory_desc_t *virtual_map)
153{
154 return efi_call_virt4(set_virtual_address_map,
155 memory_map_size, descriptor_size,
156 descriptor_version, virtual_map);
157}
158
159static efi_status_t __init phys_efi_set_virtual_address_map(
160 unsigned long memory_map_size,
161 unsigned long descriptor_size,
162 u32 descriptor_version,
163 efi_memory_desc_t *virtual_map)
164{
165 efi_status_t status;
166
167 efi_call_phys_prelog();
168 status = efi_call_phys4(efi_phys.set_virtual_address_map,
169 memory_map_size, descriptor_size,
170 descriptor_version, virtual_map);
171 efi_call_phys_epilog();
172 return status;
173}
174
175static efi_status_t __init phys_efi_get_time(efi_time_t *tm,
176 efi_time_cap_t *tc)
177{
178 efi_status_t status;
179
180 efi_call_phys_prelog();
181 status = efi_call_phys2(efi_phys.get_time, tm, tc);
182 efi_call_phys_epilog();
183 return status;
184}
185
186int efi_set_rtc_mmss(unsigned long nowtime)
187{
188 int real_seconds, real_minutes;
189 efi_status_t status;
190 efi_time_t eft;
191 efi_time_cap_t cap;
192
193 status = efi.get_time(&eft, &cap);
194 if (status != EFI_SUCCESS) {
195 printk(KERN_ERR "Oops: efitime: can't read time!\n");
196 return -1;
197 }
198
199 real_seconds = nowtime % 60;
200 real_minutes = nowtime / 60;
201 if (((abs(real_minutes - eft.minute) + 15)/30) & 1)
202 real_minutes += 30;
203 real_minutes %= 60;
204 eft.minute = real_minutes;
205 eft.second = real_seconds;
206
207 status = efi.set_time(&eft);
208 if (status != EFI_SUCCESS) {
209 printk(KERN_ERR "Oops: efitime: can't write time!\n");
210 return -1;
211 }
212 return 0;
213}
214
215unsigned long efi_get_time(void)
216{
217 efi_status_t status;
218 efi_time_t eft;
219 efi_time_cap_t cap;
220
221 status = efi.get_time(&eft, &cap);
222 if (status != EFI_SUCCESS)
223 printk(KERN_ERR "Oops: efitime: can't read time!\n");
224
225 return mktime(eft.year, eft.month, eft.day, eft.hour,
226 eft.minute, eft.second);
227}
228
229/*
230 * Tell the kernel about the EFI memory map. This might include
231 * more than the max 128 entries that can fit in the e820 legacy
232 * (zeropage) memory map.
233 */
234
235static void __init do_add_efi_memmap(void)
236{
237 void *p;
238
239 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
240 efi_memory_desc_t *md = p;
241 unsigned long long start = md->phys_addr;
242 unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
243 int e820_type;
244
245 switch (md->type) {
246 case EFI_LOADER_CODE:
247 case EFI_LOADER_DATA:
248 case EFI_BOOT_SERVICES_CODE:
249 case EFI_BOOT_SERVICES_DATA:
250 case EFI_CONVENTIONAL_MEMORY:
251 if (md->attribute & EFI_MEMORY_WB)
252 e820_type = E820_RAM;
253 else
254 e820_type = E820_RESERVED;
255 break;
256 case EFI_ACPI_RECLAIM_MEMORY:
257 e820_type = E820_ACPI;
258 break;
259 case EFI_ACPI_MEMORY_NVS:
260 e820_type = E820_NVS;
261 break;
262 case EFI_UNUSABLE_MEMORY:
263 e820_type = E820_UNUSABLE;
264 break;
265 default:
266 /*
267 * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE
268 * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO
269 * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE
270 */
271 e820_type = E820_RESERVED;
272 break;
273 }
274 e820_add_region(start, size, e820_type);
275 }
276 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
277}
278
279void __init efi_memblock_x86_reserve_range(void)
280{
281 unsigned long pmap;
282
283#ifdef CONFIG_X86_32
284 pmap = boot_params.efi_info.efi_memmap;
285#else
286 pmap = (boot_params.efi_info.efi_memmap |
287 ((__u64)boot_params.efi_info.efi_memmap_hi<<32));
288#endif
289 memmap.phys_map = (void *)pmap;
290 memmap.nr_map = boot_params.efi_info.efi_memmap_size /
291 boot_params.efi_info.efi_memdesc_size;
292 memmap.desc_version = boot_params.efi_info.efi_memdesc_version;
293 memmap.desc_size = boot_params.efi_info.efi_memdesc_size;
294 memblock_x86_reserve_range(pmap, pmap + memmap.nr_map * memmap.desc_size,
295 "EFI memmap");
296}
297
298#if EFI_DEBUG
299static void __init print_efi_memmap(void)
300{
301 efi_memory_desc_t *md;
302 void *p;
303 int i;
304
305 for (p = memmap.map, i = 0;
306 p < memmap.map_end;
307 p += memmap.desc_size, i++) {
308 md = p;
309 printk(KERN_INFO PFX "mem%02u: type=%u, attr=0x%llx, "
310 "range=[0x%016llx-0x%016llx) (%lluMB)\n",
311 i, md->type, md->attribute, md->phys_addr,
312 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
313 (md->num_pages >> (20 - EFI_PAGE_SHIFT)));
314 }
315}
316#endif /* EFI_DEBUG */
317
318void __init efi_init(void)
319{
320 efi_config_table_t *config_tables;
321 efi_runtime_services_t *runtime;
322 efi_char16_t *c16;
323 char vendor[100] = "unknown";
324 int i = 0;
325 void *tmp;
326
327#ifdef CONFIG_X86_32
328 efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
329#else
330 efi_phys.systab = (efi_system_table_t *)
331 (boot_params.efi_info.efi_systab |
332 ((__u64)boot_params.efi_info.efi_systab_hi<<32));
333#endif
334
335 efi.systab = early_ioremap((unsigned long)efi_phys.systab,
336 sizeof(efi_system_table_t));
337 if (efi.systab == NULL)
338 printk(KERN_ERR "Couldn't map the EFI system table!\n");
339 memcpy(&efi_systab, efi.systab, sizeof(efi_system_table_t));
340 early_iounmap(efi.systab, sizeof(efi_system_table_t));
341 efi.systab = &efi_systab;
342
343 /*
344 * Verify the EFI Table
345 */
346 if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
347 printk(KERN_ERR "EFI system table signature incorrect!\n");
348 if ((efi.systab->hdr.revision >> 16) == 0)
349 printk(KERN_ERR "Warning: EFI system table version "
350 "%d.%02d, expected 1.00 or greater!\n",
351 efi.systab->hdr.revision >> 16,
352 efi.systab->hdr.revision & 0xffff);
353
354 /*
355 * Show what we know for posterity
356 */
357 c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
358 if (c16) {
359 for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
360 vendor[i] = *c16++;
361 vendor[i] = '\0';
362 } else
363 printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
364 early_iounmap(tmp, 2);
365
366 printk(KERN_INFO "EFI v%u.%.02u by %s\n",
367 efi.systab->hdr.revision >> 16,
368 efi.systab->hdr.revision & 0xffff, vendor);
369
370 /*
371 * Let's see what config tables the firmware passed to us.
372 */
373 config_tables = early_ioremap(
374 efi.systab->tables,
375 efi.systab->nr_tables * sizeof(efi_config_table_t));
376 if (config_tables == NULL)
377 printk(KERN_ERR "Could not map EFI Configuration Table!\n");
378
379 printk(KERN_INFO);
380 for (i = 0; i < efi.systab->nr_tables; i++) {
381 if (!efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID)) {
382 efi.mps = config_tables[i].table;
383 printk(" MPS=0x%lx ", config_tables[i].table);
384 } else if (!efi_guidcmp(config_tables[i].guid,
385 ACPI_20_TABLE_GUID)) {
386 efi.acpi20 = config_tables[i].table;
387 printk(" ACPI 2.0=0x%lx ", config_tables[i].table);
388 } else if (!efi_guidcmp(config_tables[i].guid,
389 ACPI_TABLE_GUID)) {
390 efi.acpi = config_tables[i].table;
391 printk(" ACPI=0x%lx ", config_tables[i].table);
392 } else if (!efi_guidcmp(config_tables[i].guid,
393 SMBIOS_TABLE_GUID)) {
394 efi.smbios = config_tables[i].table;
395 printk(" SMBIOS=0x%lx ", config_tables[i].table);
396#ifdef CONFIG_X86_UV
397 } else if (!efi_guidcmp(config_tables[i].guid,
398 UV_SYSTEM_TABLE_GUID)) {
399 efi.uv_systab = config_tables[i].table;
400 printk(" UVsystab=0x%lx ", config_tables[i].table);
401#endif
402 } else if (!efi_guidcmp(config_tables[i].guid,
403 HCDP_TABLE_GUID)) {
404 efi.hcdp = config_tables[i].table;
405 printk(" HCDP=0x%lx ", config_tables[i].table);
406 } else if (!efi_guidcmp(config_tables[i].guid,
407 UGA_IO_PROTOCOL_GUID)) {
408 efi.uga = config_tables[i].table;
409 printk(" UGA=0x%lx ", config_tables[i].table);
410 }
411 }
412 printk("\n");
413 early_iounmap(config_tables,
414 efi.systab->nr_tables * sizeof(efi_config_table_t));
415
416 /*
417 * Check out the runtime services table. We need to map
418 * the runtime services table so that we can grab the physical
419 * address of several of the EFI runtime functions, needed to
420 * set the firmware into virtual mode.
421 */
422 runtime = early_ioremap((unsigned long)efi.systab->runtime,
423 sizeof(efi_runtime_services_t));
424 if (runtime != NULL) {
425 /*
426 * We will only need *early* access to the following
427 * two EFI runtime services before set_virtual_address_map
428 * is invoked.
429 */
430 efi_phys.get_time = (efi_get_time_t *)runtime->get_time;
431 efi_phys.set_virtual_address_map =
432 (efi_set_virtual_address_map_t *)
433 runtime->set_virtual_address_map;
434 /*
435 * Make efi_get_time can be called before entering
436 * virtual mode.
437 */
438 efi.get_time = phys_efi_get_time;
439 } else
440 printk(KERN_ERR "Could not map the EFI runtime service "
441 "table!\n");
442 early_iounmap(runtime, sizeof(efi_runtime_services_t));
443
444 /* Map the EFI memory map */
445 memmap.map = early_ioremap((unsigned long)memmap.phys_map,
446 memmap.nr_map * memmap.desc_size);
447 if (memmap.map == NULL)
448 printk(KERN_ERR "Could not map the EFI memory map!\n");
449 memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
450
451 if (memmap.desc_size != sizeof(efi_memory_desc_t))
452 printk(KERN_WARNING
453 "Kernel-defined memdesc doesn't match the one from EFI!\n");
454
455 if (add_efi_memmap)
456 do_add_efi_memmap();
457
458#ifdef CONFIG_X86_32
459 x86_platform.get_wallclock = efi_get_time;
460 x86_platform.set_wallclock = efi_set_rtc_mmss;
461#endif
462
463 /* Setup for EFI runtime service */
464 reboot_type = BOOT_EFI;
465
466#if EFI_DEBUG
467 print_efi_memmap();
468#endif
469}
470
471static void __init runtime_code_page_mkexec(void)
472{
473 efi_memory_desc_t *md;
474 void *p;
475 u64 addr, npages;
476
477 /* Make EFI runtime service code area executable */
478 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
479 md = p;
480
481 if (md->type != EFI_RUNTIME_SERVICES_CODE)
482 continue;
483
484 addr = md->virt_addr;
485 npages = md->num_pages;
486 memrange_efi_to_native(&addr, &npages);
487 set_memory_x(addr, npages);
488 }
489}
490
491/*
492 * This function will switch the EFI runtime services to virtual mode.
493 * Essentially, look through the EFI memmap and map every region that
494 * has the runtime attribute bit set in its memory descriptor and update
495 * that memory descriptor with the virtual address obtained from ioremap().
496 * This enables the runtime services to be called without having to
497 * thunk back into physical mode for every invocation.
498 */
499void __init efi_enter_virtual_mode(void)
500{
501 efi_memory_desc_t *md;
502 efi_status_t status;
503 unsigned long size;
504 u64 end, systab, addr, npages, end_pfn;
505 void *p, *va;
506
507 efi.systab = NULL;
508 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
509 md = p;
510 if (!(md->attribute & EFI_MEMORY_RUNTIME))
511 continue;
512
513 size = md->num_pages << EFI_PAGE_SHIFT;
514 end = md->phys_addr + size;
515
516 end_pfn = PFN_UP(end);
517 if (end_pfn <= max_low_pfn_mapped
518 || (end_pfn > (1UL << (32 - PAGE_SHIFT))
519 && end_pfn <= max_pfn_mapped))
520 va = __va(md->phys_addr);
521 else
522 va = efi_ioremap(md->phys_addr, size, md->type);
523
524 md->virt_addr = (u64) (unsigned long) va;
525
526 if (!va) {
527 printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n",
528 (unsigned long long)md->phys_addr);
529 continue;
530 }
531
532 if (!(md->attribute & EFI_MEMORY_WB)) {
533 addr = md->virt_addr;
534 npages = md->num_pages;
535 memrange_efi_to_native(&addr, &npages);
536 set_memory_uc(addr, npages);
537 }
538
539 systab = (u64) (unsigned long) efi_phys.systab;
540 if (md->phys_addr <= systab && systab < end) {
541 systab += md->virt_addr - md->phys_addr;
542 efi.systab = (efi_system_table_t *) (unsigned long) systab;
543 }
544 }
545
546 BUG_ON(!efi.systab);
547
548 status = phys_efi_set_virtual_address_map(
549 memmap.desc_size * memmap.nr_map,
550 memmap.desc_size,
551 memmap.desc_version,
552 memmap.phys_map);
553
554 if (status != EFI_SUCCESS) {
555 printk(KERN_ALERT "Unable to switch EFI into virtual mode "
556 "(status=%lx)!\n", status);
557 panic("EFI call to SetVirtualAddressMap() failed!");
558 }
559
560 /*
561 * Now that EFI is in virtual mode, update the function
562 * pointers in the runtime service table to the new virtual addresses.
563 *
564 * Call EFI services through wrapper functions.
565 */
566 efi.get_time = virt_efi_get_time;
567 efi.set_time = virt_efi_set_time;
568 efi.get_wakeup_time = virt_efi_get_wakeup_time;
569 efi.set_wakeup_time = virt_efi_set_wakeup_time;
570 efi.get_variable = virt_efi_get_variable;
571 efi.get_next_variable = virt_efi_get_next_variable;
572 efi.set_variable = virt_efi_set_variable;
573 efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
574 efi.reset_system = virt_efi_reset_system;
575 efi.set_virtual_address_map = virt_efi_set_virtual_address_map;
576 if (__supported_pte_mask & _PAGE_NX)
577 runtime_code_page_mkexec();
578 early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
579 memmap.map = NULL;
580}
581
582/*
583 * Convenience functions to obtain memory types and attributes
584 */
585u32 efi_mem_type(unsigned long phys_addr)
586{
587 efi_memory_desc_t *md;
588 void *p;
589
590 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
591 md = p;
592 if ((md->phys_addr <= phys_addr) &&
593 (phys_addr < (md->phys_addr +
594 (md->num_pages << EFI_PAGE_SHIFT))))
595 return md->type;
596 }
597 return 0;
598}
599
600u64 efi_mem_attributes(unsigned long phys_addr)
601{
602 efi_memory_desc_t *md;
603 void *p;
604
605 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
606 md = p;
607 if ((md->phys_addr <= phys_addr) &&
608 (phys_addr < (md->phys_addr +
609 (md->num_pages << EFI_PAGE_SHIFT))))
610 return md->attribute;
611 }
612 return 0;
613}
diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
deleted file mode 100644
index 5cab48ee61a4..000000000000
--- a/arch/x86/kernel/efi_32.c
+++ /dev/null
@@ -1,112 +0,0 @@
1/*
2 * Extensible Firmware Interface
3 *
4 * Based on Extensible Firmware Interface Specification version 1.0
5 *
6 * Copyright (C) 1999 VA Linux Systems
7 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
8 * Copyright (C) 1999-2002 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
22#include <linux/kernel.h>
23#include <linux/types.h>
24#include <linux/ioport.h>
25#include <linux/efi.h>
26
27#include <asm/io.h>
28#include <asm/page.h>
29#include <asm/pgtable.h>
30#include <asm/tlbflush.h>
31#include <asm/efi.h>
32
33/*
34 * To make EFI call EFI runtime service in physical addressing mode we need
35 * prelog/epilog before/after the invocation to disable interrupt, to
36 * claim EFI runtime service handler exclusively and to duplicate a memory in
37 * low memory space say 0 - 3G.
38 */
39
40static unsigned long efi_rt_eflags;
41static pgd_t efi_bak_pg_dir_pointer[2];
42
43void efi_call_phys_prelog(void)
44{
45 unsigned long cr4;
46 unsigned long temp;
47 struct desc_ptr gdt_descr;
48
49 local_irq_save(efi_rt_eflags);
50
51 /*
52 * If I don't have PAE, I should just duplicate two entries in page
53 * directory. If I have PAE, I just need to duplicate one entry in
54 * page directory.
55 */
56 cr4 = read_cr4_safe();
57
58 if (cr4 & X86_CR4_PAE) {
59 efi_bak_pg_dir_pointer[0].pgd =
60 swapper_pg_dir[pgd_index(0)].pgd;
61 swapper_pg_dir[0].pgd =
62 swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
63 } else {
64 efi_bak_pg_dir_pointer[0].pgd =
65 swapper_pg_dir[pgd_index(0)].pgd;
66 efi_bak_pg_dir_pointer[1].pgd =
67 swapper_pg_dir[pgd_index(0x400000)].pgd;
68 swapper_pg_dir[pgd_index(0)].pgd =
69 swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
70 temp = PAGE_OFFSET + 0x400000;
71 swapper_pg_dir[pgd_index(0x400000)].pgd =
72 swapper_pg_dir[pgd_index(temp)].pgd;
73 }
74
75 /*
76 * After the lock is released, the original page table is restored.
77 */
78 __flush_tlb_all();
79
80 gdt_descr.address = __pa(get_cpu_gdt_table(0));
81 gdt_descr.size = GDT_SIZE - 1;
82 load_gdt(&gdt_descr);
83}
84
85void efi_call_phys_epilog(void)
86{
87 unsigned long cr4;
88 struct desc_ptr gdt_descr;
89
90 gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
91 gdt_descr.size = GDT_SIZE - 1;
92 load_gdt(&gdt_descr);
93
94 cr4 = read_cr4_safe();
95
96 if (cr4 & X86_CR4_PAE) {
97 swapper_pg_dir[pgd_index(0)].pgd =
98 efi_bak_pg_dir_pointer[0].pgd;
99 } else {
100 swapper_pg_dir[pgd_index(0)].pgd =
101 efi_bak_pg_dir_pointer[0].pgd;
102 swapper_pg_dir[pgd_index(0x400000)].pgd =
103 efi_bak_pg_dir_pointer[1].pgd;
104 }
105
106 /*
107 * After the lock is released, the original page table is restored.
108 */
109 __flush_tlb_all();
110
111 local_irq_restore(efi_rt_eflags);
112}
diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c
deleted file mode 100644
index ac0621a7ac3d..000000000000
--- a/arch/x86/kernel/efi_64.c
+++ /dev/null
@@ -1,114 +0,0 @@
1/*
2 * x86_64 specific EFI support functions
3 * Based on Extensible Firmware Interface Specification version 1.0
4 *
5 * Copyright (C) 2005-2008 Intel Co.
6 * Fenghua Yu <fenghua.yu@intel.com>
7 * Bibo Mao <bibo.mao@intel.com>
8 * Chandramouli Narayanan <mouli@linux.intel.com>
9 * Huang Ying <ying.huang@intel.com>
10 *
11 * Code to convert EFI to E820 map has been implemented in elilo bootloader
12 * based on a EFI patch by Edgar Hucek. Based on the E820 map, the page table
13 * is setup appropriately for EFI runtime code.
14 * - mouli 06/14/2007.
15 *
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/mm.h>
21#include <linux/types.h>
22#include <linux/spinlock.h>
23#include <linux/bootmem.h>
24#include <linux/ioport.h>
25#include <linux/module.h>
26#include <linux/efi.h>
27#include <linux/uaccess.h>
28#include <linux/io.h>
29#include <linux/reboot.h>
30
31#include <asm/setup.h>
32#include <asm/page.h>
33#include <asm/e820.h>
34#include <asm/pgtable.h>
35#include <asm/tlbflush.h>
36#include <asm/proto.h>
37#include <asm/efi.h>
38#include <asm/cacheflush.h>
39#include <asm/fixmap.h>
40
41static pgd_t save_pgd __initdata;
42static unsigned long efi_flags __initdata;
43
44static void __init early_mapping_set_exec(unsigned long start,
45 unsigned long end,
46 int executable)
47{
48 unsigned long num_pages;
49
50 start &= PMD_MASK;
51 end = (end + PMD_SIZE - 1) & PMD_MASK;
52 num_pages = (end - start) >> PAGE_SHIFT;
53 if (executable)
54 set_memory_x((unsigned long)__va(start), num_pages);
55 else
56 set_memory_nx((unsigned long)__va(start), num_pages);
57}
58
59static void __init early_runtime_code_mapping_set_exec(int executable)
60{
61 efi_memory_desc_t *md;
62 void *p;
63
64 if (!(__supported_pte_mask & _PAGE_NX))
65 return;
66
67 /* Make EFI runtime service code area executable */
68 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
69 md = p;
70 if (md->type == EFI_RUNTIME_SERVICES_CODE) {
71 unsigned long end;
72 end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
73 early_mapping_set_exec(md->phys_addr, end, executable);
74 }
75 }
76}
77
78void __init efi_call_phys_prelog(void)
79{
80 unsigned long vaddress;
81
82 early_runtime_code_mapping_set_exec(1);
83 local_irq_save(efi_flags);
84 vaddress = (unsigned long)__va(0x0UL);
85 save_pgd = *pgd_offset_k(0x0UL);
86 set_pgd(pgd_offset_k(0x0UL), *pgd_offset_k(vaddress));
87 __flush_tlb_all();
88}
89
90void __init efi_call_phys_epilog(void)
91{
92 /*
93 * After the lock is released, the original page table is restored.
94 */
95 set_pgd(pgd_offset_k(0x0UL), save_pgd);
96 __flush_tlb_all();
97 local_irq_restore(efi_flags);
98 early_runtime_code_mapping_set_exec(0);
99}
100
101void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
102 u32 type)
103{
104 unsigned long last_map_pfn;
105
106 if (type == EFI_MEMORY_MAPPED_IO)
107 return ioremap(phys_addr, size);
108
109 last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
110 if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size)
111 return NULL;
112
113 return (void __iomem *)__va(phys_addr);
114}
diff --git a/arch/x86/kernel/efi_stub_32.S b/arch/x86/kernel/efi_stub_32.S
deleted file mode 100644
index fbe66e626c09..000000000000
--- a/arch/x86/kernel/efi_stub_32.S
+++ /dev/null
@@ -1,123 +0,0 @@
1/*
2 * EFI call stub for IA32.
3 *
4 * This stub allows us to make EFI calls in physical mode with interrupts
5 * turned off.
6 */
7
8#include <linux/linkage.h>
9#include <asm/page_types.h>
10
11/*
12 * efi_call_phys(void *, ...) is a function with variable parameters.
13 * All the callers of this function assure that all the parameters are 4-bytes.
14 */
15
16/*
17 * In gcc calling convention, EBX, ESP, EBP, ESI and EDI are all callee save.
18 * So we'd better save all of them at the beginning of this function and restore
19 * at the end no matter how many we use, because we can not assure EFI runtime
20 * service functions will comply with gcc calling convention, too.
21 */
22
23.text
24ENTRY(efi_call_phys)
25 /*
26 * 0. The function can only be called in Linux kernel. So CS has been
27 * set to 0x0010, DS and SS have been set to 0x0018. In EFI, I found
28 * the values of these registers are the same. And, the corresponding
29 * GDT entries are identical. So I will do nothing about segment reg
30 * and GDT, but change GDT base register in prelog and epilog.
31 */
32
33 /*
34 * 1. Now I am running with EIP = <physical address> + PAGE_OFFSET.
35 * But to make it smoothly switch from virtual mode to flat mode.
36 * The mapping of lower virtual memory has been created in prelog and
37 * epilog.
38 */
39 movl $1f, %edx
40 subl $__PAGE_OFFSET, %edx
41 jmp *%edx
421:
43
44 /*
45 * 2. Now on the top of stack is the return
46 * address in the caller of efi_call_phys(), then parameter 1,
47 * parameter 2, ..., param n. To make things easy, we save the return
48 * address of efi_call_phys in a global variable.
49 */
50 popl %edx
51 movl %edx, saved_return_addr
52 /* get the function pointer into ECX*/
53 popl %ecx
54 movl %ecx, efi_rt_function_ptr
55 movl $2f, %edx
56 subl $__PAGE_OFFSET, %edx
57 pushl %edx
58
59 /*
60 * 3. Clear PG bit in %CR0.
61 */
62 movl %cr0, %edx
63 andl $0x7fffffff, %edx
64 movl %edx, %cr0
65 jmp 1f
661:
67
68 /*
69 * 4. Adjust stack pointer.
70 */
71 subl $__PAGE_OFFSET, %esp
72
73 /*
74 * 5. Call the physical function.
75 */
76 jmp *%ecx
77
782:
79 /*
80 * 6. After EFI runtime service returns, control will return to
81 * following instruction. We'd better readjust stack pointer first.
82 */
83 addl $__PAGE_OFFSET, %esp
84
85 /*
86 * 7. Restore PG bit
87 */
88 movl %cr0, %edx
89 orl $0x80000000, %edx
90 movl %edx, %cr0
91 jmp 1f
921:
93 /*
94 * 8. Now restore the virtual mode from flat mode by
95 * adding EIP with PAGE_OFFSET.
96 */
97 movl $1f, %edx
98 jmp *%edx
991:
100
101 /*
102 * 9. Balance the stack. And because EAX contain the return value,
103 * we'd better not clobber it.
104 */
105 leal efi_rt_function_ptr, %edx
106 movl (%edx), %ecx
107 pushl %ecx
108
109 /*
110 * 10. Push the saved return address onto the stack and return.
111 */
112 leal saved_return_addr, %edx
113 movl (%edx), %ecx
114 pushl %ecx
115 ret
116ENDPROC(efi_call_phys)
117.previous
118
119.data
120saved_return_addr:
121 .long 0
122efi_rt_function_ptr:
123 .long 0
diff --git a/arch/x86/kernel/efi_stub_64.S b/arch/x86/kernel/efi_stub_64.S
deleted file mode 100644
index 4c07ccab8146..000000000000
--- a/arch/x86/kernel/efi_stub_64.S
+++ /dev/null
@@ -1,116 +0,0 @@
1/*
2 * Function calling ABI conversion from Linux to EFI for x86_64
3 *
4 * Copyright (C) 2007 Intel Corp
5 * Bibo Mao <bibo.mao@intel.com>
6 * Huang Ying <ying.huang@intel.com>
7 */
8
9#include <linux/linkage.h>
10
11#define SAVE_XMM \
12 mov %rsp, %rax; \
13 subq $0x70, %rsp; \
14 and $~0xf, %rsp; \
15 mov %rax, (%rsp); \
16 mov %cr0, %rax; \
17 clts; \
18 mov %rax, 0x8(%rsp); \
19 movaps %xmm0, 0x60(%rsp); \
20 movaps %xmm1, 0x50(%rsp); \
21 movaps %xmm2, 0x40(%rsp); \
22 movaps %xmm3, 0x30(%rsp); \
23 movaps %xmm4, 0x20(%rsp); \
24 movaps %xmm5, 0x10(%rsp)
25
26#define RESTORE_XMM \
27 movaps 0x60(%rsp), %xmm0; \
28 movaps 0x50(%rsp), %xmm1; \
29 movaps 0x40(%rsp), %xmm2; \
30 movaps 0x30(%rsp), %xmm3; \
31 movaps 0x20(%rsp), %xmm4; \
32 movaps 0x10(%rsp), %xmm5; \
33 mov 0x8(%rsp), %rsi; \
34 mov %rsi, %cr0; \
35 mov (%rsp), %rsp
36
37ENTRY(efi_call0)
38 SAVE_XMM
39 subq $32, %rsp
40 call *%rdi
41 addq $32, %rsp
42 RESTORE_XMM
43 ret
44ENDPROC(efi_call0)
45
46ENTRY(efi_call1)
47 SAVE_XMM
48 subq $32, %rsp
49 mov %rsi, %rcx
50 call *%rdi
51 addq $32, %rsp
52 RESTORE_XMM
53 ret
54ENDPROC(efi_call1)
55
56ENTRY(efi_call2)
57 SAVE_XMM
58 subq $32, %rsp
59 mov %rsi, %rcx
60 call *%rdi
61 addq $32, %rsp
62 RESTORE_XMM
63 ret
64ENDPROC(efi_call2)
65
66ENTRY(efi_call3)
67 SAVE_XMM
68 subq $32, %rsp
69 mov %rcx, %r8
70 mov %rsi, %rcx
71 call *%rdi
72 addq $32, %rsp
73 RESTORE_XMM
74 ret
75ENDPROC(efi_call3)
76
77ENTRY(efi_call4)
78 SAVE_XMM
79 subq $32, %rsp
80 mov %r8, %r9
81 mov %rcx, %r8
82 mov %rsi, %rcx
83 call *%rdi
84 addq $32, %rsp
85 RESTORE_XMM
86 ret
87ENDPROC(efi_call4)
88
89ENTRY(efi_call5)
90 SAVE_XMM
91 subq $48, %rsp
92 mov %r9, 32(%rsp)
93 mov %r8, %r9
94 mov %rcx, %r8
95 mov %rsi, %rcx
96 call *%rdi
97 addq $48, %rsp
98 RESTORE_XMM
99 ret
100ENDPROC(efi_call5)
101
102ENTRY(efi_call6)
103 SAVE_XMM
104 mov (%rsp), %rax
105 mov 8(%rax), %rax
106 subq $48, %rsp
107 mov %r9, 32(%rsp)
108 mov %rax, 40(%rsp)
109 mov %r8, %r9
110 mov %rcx, %r8
111 mov %rsi, %rcx
112 call *%rdi
113 addq $48, %rsp
114 RESTORE_XMM
115 ret
116ENDPROC(efi_call6)
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-17 00:11:54 -0500