2 * Extensible Firmware Interface
4 * Based on Extensible Firmware Interface Specification version 0.9 April 30, 1999
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>
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
16 * Implemented EFI runtime services and virtual mode calls. --davidm
18 * Goutham Rao: <goutham.rao@intel.com>
19 * Skip non-WB memory and ignore empty memory ranges.
21 #include <linux/config.h>
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/types.h>
25 #include <linux/time.h>
26 #include <linux/proc_fs.h>
27 #include <linux/efi.h>
30 #include <asm/kregs.h>
31 #include <asm/pgtable.h>
32 #include <asm/processor.h>
36 extern efi_status_t efi_call_phys (void *, ...);
39 static efi_runtime_services_t *runtime;
42 * efi_dir is allocated here, but the directory isn't created
43 * here, as proc_mkdir() doesn't work this early in the bootup
44 * process. Therefore, each module, like efivars, must test for
45 * if (!efi_dir) efi_dir = proc_mkdir("efi", NULL);
46 * prior to creating their own entries under /proc/efi.
49 struct proc_dir_entry *efi_dir;
52 static unsigned long mem_limit = ~0UL;
54 #define efi_call_virt(f, args...) (*(f))(args)
56 #define STUB_GET_TIME(prefix, adjust_arg) \
58 prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \
60 struct ia64_fpreg fr[6]; \
63 ia64_save_scratch_fpregs(fr); \
64 ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), adjust_arg(tm), \
66 ia64_load_scratch_fpregs(fr); \
70 #define STUB_SET_TIME(prefix, adjust_arg) \
72 prefix##_set_time (efi_time_t *tm) \
74 struct ia64_fpreg fr[6]; \
77 ia64_save_scratch_fpregs(fr); \
78 ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), adjust_arg(tm)); \
79 ia64_load_scratch_fpregs(fr); \
83 #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \
85 prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm) \
87 struct ia64_fpreg fr[6]; \
90 ia64_save_scratch_fpregs(fr); \
91 ret = efi_call_##prefix((efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \
92 adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \
93 ia64_load_scratch_fpregs(fr); \
97 #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \
99 prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \
101 struct ia64_fpreg fr[6]; \
104 ia64_save_scratch_fpregs(fr); \
105 ret = efi_call_##prefix((efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \
106 enabled, adjust_arg(tm)); \
107 ia64_load_scratch_fpregs(fr); \
111 #define STUB_GET_VARIABLE(prefix, adjust_arg) \
112 static efi_status_t \
113 prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \
114 unsigned long *data_size, void *data) \
116 struct ia64_fpreg fr[6]; \
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), adjust_arg(attr), \
122 adjust_arg(data_size), adjust_arg(data)); \
123 ia64_load_scratch_fpregs(fr); \
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) \
131 struct ia64_fpreg fr[6]; \
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); \
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, u32 attr, \
144 unsigned long data_size, void *data) \
146 struct ia64_fpreg fr[6]; \
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, \
153 ia64_load_scratch_fpregs(fr); \
157 #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \
158 static efi_status_t \
159 prefix##_get_next_high_mono_count (u64 *count) \
161 struct ia64_fpreg fr[6]; \
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); \
171 #define STUB_RESET_SYSTEM(prefix, adjust_arg) \
173 prefix##_reset_system (int reset_type, efi_status_t status, \
174 unsigned long data_size, efi_char16_t *data) \
176 struct ia64_fpreg fr[6]; \
178 ia64_save_scratch_fpregs(fr); \
179 efi_call_##prefix((efi_reset_system_t *) __va(runtime->reset_system), \
180 reset_type, status, data_size, adjust_arg(data)); \
181 /* should not return, but just in case... */ \
182 ia64_load_scratch_fpregs(fr); \
185 STUB_GET_TIME(phys, __pa)
186 STUB_SET_TIME(phys, __pa)
187 STUB_GET_WAKEUP_TIME(phys, __pa)
188 STUB_SET_WAKEUP_TIME(phys, __pa)
189 STUB_GET_VARIABLE(phys, __pa)
190 STUB_GET_NEXT_VARIABLE(phys, __pa)
191 STUB_SET_VARIABLE(phys, __pa)
192 STUB_GET_NEXT_HIGH_MONO_COUNT(phys, __pa)
193 STUB_RESET_SYSTEM(phys, __pa)
195 STUB_GET_TIME(virt, )
196 STUB_SET_TIME(virt, )
197 STUB_GET_WAKEUP_TIME(virt, )
198 STUB_SET_WAKEUP_TIME(virt, )
199 STUB_GET_VARIABLE(virt, )
200 STUB_GET_NEXT_VARIABLE(virt, )
201 STUB_SET_VARIABLE(virt, )
202 STUB_GET_NEXT_HIGH_MONO_COUNT(virt, )
203 STUB_RESET_SYSTEM(virt, )
206 efi_gettimeofday (struct timespec *ts)
210 memset(ts, 0, sizeof(ts));
211 if ((*efi.get_time)(&tm, 0) != EFI_SUCCESS)
214 ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
215 ts->tv_nsec = tm.nanosecond;
219 is_available_memory (efi_memory_desc_t *md)
221 if (!(md->attribute & EFI_MEMORY_WB))
225 case EFI_LOADER_CODE:
226 case EFI_LOADER_DATA:
227 case EFI_BOOT_SERVICES_CODE:
228 case EFI_BOOT_SERVICES_DATA:
229 case EFI_CONVENTIONAL_MEMORY:
236 * Trim descriptor MD so its starts at address START_ADDR. If the descriptor covers
237 * memory that is normally available to the kernel, issue a warning that some memory
241 trim_bottom (efi_memory_desc_t *md, u64 start_addr)
243 u64 num_skipped_pages;
245 if (md->phys_addr >= start_addr || !md->num_pages)
248 num_skipped_pages = (start_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
249 if (num_skipped_pages > md->num_pages)
250 num_skipped_pages = md->num_pages;
252 if (is_available_memory(md))
253 printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
254 "at 0x%lx\n", __FUNCTION__,
255 (num_skipped_pages << EFI_PAGE_SHIFT) >> 10,
256 md->phys_addr, start_addr - IA64_GRANULE_SIZE);
258 * NOTE: Don't set md->phys_addr to START_ADDR because that could cause the memory
259 * descriptor list to become unsorted. In such a case, md->num_pages will be
260 * zero, so the Right Thing will happen.
262 md->phys_addr += num_skipped_pages << EFI_PAGE_SHIFT;
263 md->num_pages -= num_skipped_pages;
267 trim_top (efi_memory_desc_t *md, u64 end_addr)
269 u64 num_dropped_pages, md_end_addr;
271 md_end_addr = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
273 if (md_end_addr <= end_addr || !md->num_pages)
276 num_dropped_pages = (md_end_addr - end_addr) >> EFI_PAGE_SHIFT;
277 if (num_dropped_pages > md->num_pages)
278 num_dropped_pages = md->num_pages;
280 if (is_available_memory(md))
281 printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
282 "at 0x%lx\n", __FUNCTION__,
283 (num_dropped_pages << EFI_PAGE_SHIFT) >> 10,
284 md->phys_addr, end_addr);
285 md->num_pages -= num_dropped_pages;
289 * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that
290 * has memory that is available for OS use.
293 efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
300 void *efi_map_start, *efi_map_end, *p, *q, *r;
301 efi_memory_desc_t *md, *check_md;
302 u64 efi_desc_size, start, end, granule_addr, first_non_wb_addr = 0;
304 efi_map_start = __va(ia64_boot_param->efi_memmap);
305 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
306 efi_desc_size = ia64_boot_param->efi_memdesc_size;
308 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
311 /* skip over non-WB memory descriptors; that's all we're interested in... */
312 if (!(md->attribute & EFI_MEMORY_WB))
315 if (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) > first_non_wb_addr) {
317 * Search for the next run of contiguous WB memory. Start search
318 * at first granule boundary covered by md.
320 granule_addr = ((md->phys_addr + IA64_GRANULE_SIZE - 1)
321 & -IA64_GRANULE_SIZE);
322 first_non_wb_addr = granule_addr;
323 for (q = p; q < efi_map_end; q += efi_desc_size) {
326 if (check_md->attribute & EFI_MEMORY_WB)
327 trim_bottom(md, granule_addr);
329 if (check_md->phys_addr < granule_addr)
332 if (!(check_md->attribute & EFI_MEMORY_WB))
333 break; /* hit a non-WB region; stop search */
335 if (check_md->phys_addr != first_non_wb_addr)
336 break; /* hit a memory hole; stop search */
338 first_non_wb_addr += check_md->num_pages << EFI_PAGE_SHIFT;
340 /* round it down to the previous granule-boundary: */
341 first_non_wb_addr &= -IA64_GRANULE_SIZE;
343 if (!(first_non_wb_addr > granule_addr))
344 continue; /* couldn't find enough contiguous memory */
346 for (r = p; r < q; r += efi_desc_size)
347 trim_top(r, first_non_wb_addr);
350 if (is_available_memory(md)) {
351 if (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) > mem_limit) {
352 if (md->phys_addr > mem_limit)
354 md->num_pages = (mem_limit - md->phys_addr) >> EFI_PAGE_SHIFT;
357 if (md->num_pages == 0)
360 curr.start = PAGE_OFFSET + md->phys_addr;
361 curr.end = curr.start + (md->num_pages << EFI_PAGE_SHIFT);
367 if (curr.start < prev.start)
368 printk(KERN_ERR "Oops: EFI memory table not ordered!\n");
370 if (prev.end == curr.start) {
371 /* merge two consecutive memory ranges */
374 start = PAGE_ALIGN(prev.start);
375 end = prev.end & PAGE_MASK;
376 if ((end > start) && (*callback)(start, end, arg) < 0)
384 start = PAGE_ALIGN(prev.start);
385 end = prev.end & PAGE_MASK;
387 (*callback)(start, end, arg);
392 * Look for the PAL_CODE region reported by EFI and maps it using an
393 * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor
394 * Abstraction Layer chapter 11 in ADAG
397 efi_map_pal_code (void)
399 void *efi_map_start, *efi_map_end, *p;
400 efi_memory_desc_t *md;
402 int pal_code_count = 0;
406 efi_map_start = __va(ia64_boot_param->efi_memmap);
407 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
408 efi_desc_size = ia64_boot_param->efi_memdesc_size;
410 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
412 if (md->type != EFI_PAL_CODE)
415 if (++pal_code_count > 1) {
416 printk(KERN_ERR "Too many EFI Pal Code memory ranges, dropped @ %lx\n",
421 * The only ITLB entry in region 7 that is used is the one installed by
422 * __start(). That entry covers a 64MB range.
424 mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
425 vaddr = PAGE_OFFSET + md->phys_addr;
428 * We must check that the PAL mapping won't overlap with the kernel
431 * PAL code is guaranteed to be aligned on a power of 2 between 4k and
432 * 256KB and that only one ITR is needed to map it. This implies that the
433 * PAL code is always aligned on its size, i.e., the closest matching page
434 * size supported by the TLB. Therefore PAL code is guaranteed never to
435 * cross a 64MB unless it is bigger than 64MB (very unlikely!). So for
436 * now the following test is enough to determine whether or not we need a
437 * dedicated ITR for the PAL code.
439 if ((vaddr & mask) == (KERNEL_START & mask)) {
440 printk(KERN_INFO "%s: no need to install ITR for PAL code\n",
445 if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE)
446 panic("Woah! PAL code size bigger than a granule!");
448 mask = ~((1 << IA64_GRANULE_SHIFT) - 1);
449 printk(KERN_INFO "CPU %d: mapping PAL code [0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
450 smp_processor_id(), md->phys_addr,
451 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
452 vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
455 * Cannot write to CRx with PSR.ic=1
457 psr = ia64_clear_ic();
458 ia64_itr(0x1, IA64_TR_PALCODE, vaddr & mask,
459 pte_val(pfn_pte(md->phys_addr >> PAGE_SHIFT, PAGE_KERNEL)),
461 ia64_set_psr(psr); /* restore psr */
469 void *efi_map_start, *efi_map_end;
470 efi_config_table_t *config_tables;
473 char *cp, *end, vendor[100] = "unknown";
474 extern char saved_command_line[];
477 /* it's too early to be able to use the standard kernel command line support... */
478 for (cp = saved_command_line; *cp; ) {
479 if (memcmp(cp, "mem=", 4) == 0) {
481 mem_limit = memparse(cp, &end) - 1;
486 while (*cp != ' ' && *cp)
492 if (mem_limit != ~0UL)
493 printk(KERN_INFO "Ignoring memory above %luMB\n", mem_limit >> 20);
495 efi.systab = __va(ia64_boot_param->efi_systab);
498 * Verify the EFI Table
500 if (efi.systab == NULL)
501 panic("Woah! Can't find EFI system table.\n");
502 if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
503 panic("Woah! EFI system table signature incorrect\n");
504 if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0)
505 printk(KERN_WARNING "Warning: EFI system table major version mismatch: "
506 "got %d.%02d, expected %d.%02d\n",
507 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff,
508 EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff);
510 config_tables = __va(efi.systab->tables);
512 /* Show what we know for posterity */
513 c16 = __va(efi.systab->fw_vendor);
515 for (i = 0;i < (int) sizeof(vendor) && *c16; ++i)
520 printk(KERN_INFO "EFI v%u.%.02u by %s:",
521 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor);
523 for (i = 0; i < (int) efi.systab->nr_tables; i++) {
524 if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
525 efi.mps = __va(config_tables[i].table);
526 printk(" MPS=0x%lx", config_tables[i].table);
527 } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
528 efi.acpi20 = __va(config_tables[i].table);
529 printk(" ACPI 2.0=0x%lx", config_tables[i].table);
530 } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
531 efi.acpi = __va(config_tables[i].table);
532 printk(" ACPI=0x%lx", config_tables[i].table);
533 } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
534 efi.smbios = __va(config_tables[i].table);
535 printk(" SMBIOS=0x%lx", config_tables[i].table);
536 } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
537 efi.sal_systab = __va(config_tables[i].table);
538 printk(" SALsystab=0x%lx", config_tables[i].table);
539 } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
540 efi.hcdp = __va(config_tables[i].table);
541 printk(" HCDP=0x%lx", config_tables[i].table);
546 runtime = __va(efi.systab->runtime);
547 efi.get_time = phys_get_time;
548 efi.set_time = phys_set_time;
549 efi.get_wakeup_time = phys_get_wakeup_time;
550 efi.set_wakeup_time = phys_set_wakeup_time;
551 efi.get_variable = phys_get_variable;
552 efi.get_next_variable = phys_get_next_variable;
553 efi.set_variable = phys_set_variable;
554 efi.get_next_high_mono_count = phys_get_next_high_mono_count;
555 efi.reset_system = phys_reset_system;
557 efi_map_start = __va(ia64_boot_param->efi_memmap);
558 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
559 efi_desc_size = ia64_boot_param->efi_memdesc_size;
562 /* print EFI memory map: */
564 efi_memory_desc_t *md;
567 for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) {
569 printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n",
570 i, md->type, md->attribute, md->phys_addr,
571 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
572 md->num_pages >> (20 - EFI_PAGE_SHIFT));
578 efi_enter_virtual_mode();
582 efi_enter_virtual_mode (void)
584 void *efi_map_start, *efi_map_end, *p;
585 efi_memory_desc_t *md;
589 efi_map_start = __va(ia64_boot_param->efi_memmap);
590 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
591 efi_desc_size = ia64_boot_param->efi_memdesc_size;
593 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
595 if (md->attribute & EFI_MEMORY_RUNTIME) {
597 * Some descriptors have multiple bits set, so the order of
598 * the tests is relevant.
600 if (md->attribute & EFI_MEMORY_WB) {
601 md->virt_addr = (u64) __va(md->phys_addr);
602 } else if (md->attribute & EFI_MEMORY_UC) {
603 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
604 } else if (md->attribute & EFI_MEMORY_WC) {
606 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
612 printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
613 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
615 } else if (md->attribute & EFI_MEMORY_WT) {
617 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
618 | _PAGE_D | _PAGE_MA_WT
622 printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
623 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
629 status = efi_call_phys(__va(runtime->set_virtual_address_map),
630 ia64_boot_param->efi_memmap_size,
631 efi_desc_size, ia64_boot_param->efi_memdesc_version,
632 ia64_boot_param->efi_memmap);
633 if (status != EFI_SUCCESS) {
634 printk(KERN_WARNING "warning: unable to switch EFI into virtual mode "
635 "(status=%lu)\n", status);
640 * Now that EFI is in virtual mode, we call the EFI functions more efficiently:
642 efi.get_time = virt_get_time;
643 efi.set_time = virt_set_time;
644 efi.get_wakeup_time = virt_get_wakeup_time;
645 efi.set_wakeup_time = virt_set_wakeup_time;
646 efi.get_variable = virt_get_variable;
647 efi.get_next_variable = virt_get_next_variable;
648 efi.set_variable = virt_set_variable;
649 efi.get_next_high_mono_count = virt_get_next_high_mono_count;
650 efi.reset_system = virt_reset_system;
654 * Walk the EFI memory map looking for the I/O port range. There can only be one entry of
655 * this type, other I/O port ranges should be described via ACPI.
658 efi_get_iobase (void)
660 void *efi_map_start, *efi_map_end, *p;
661 efi_memory_desc_t *md;
664 efi_map_start = __va(ia64_boot_param->efi_memmap);
665 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
666 efi_desc_size = ia64_boot_param->efi_memdesc_size;
668 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
670 if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
671 /* paranoia attribute checking */
672 if (md->attribute == (EFI_MEMORY_UC | EFI_MEMORY_RUNTIME))
673 return md->phys_addr;
680 efi_mem_type (unsigned long phys_addr)
682 void *efi_map_start, *efi_map_end, *p;
683 efi_memory_desc_t *md;
686 efi_map_start = __va(ia64_boot_param->efi_memmap);
687 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
688 efi_desc_size = ia64_boot_param->efi_memdesc_size;
690 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
693 if ((md->phys_addr <= phys_addr) && (phys_addr <=
694 (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1)))
701 efi_mem_attributes (unsigned long phys_addr)
703 void *efi_map_start, *efi_map_end, *p;
704 efi_memory_desc_t *md;
707 efi_map_start = __va(ia64_boot_param->efi_memmap);
708 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
709 efi_desc_size = ia64_boot_param->efi_memdesc_size;
711 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
714 if ((md->phys_addr <= phys_addr) && (phys_addr <=
715 (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1)))
716 return md->attribute;
724 #ifdef CONFIG_PROC_FS
725 remove_proc_entry(efi_dir->name, NULL);