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/module.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/types.h>
26 #include <linux/time.h>
27 #include <linux/efi.h>
30 #include <asm/kregs.h>
31 #include <asm/pgtable.h>
32 #include <asm/processor.h>
37 extern efi_status_t efi_call_phys (void *, ...);
41 static efi_runtime_services_t *runtime;
42 static unsigned long mem_limit = ~0UL, max_addr = ~0UL;
44 #define efi_call_virt(f, args...) (*(f))(args)
46 #define STUB_GET_TIME(prefix, adjust_arg) \
48 prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \
50 struct ia64_fpreg fr[6]; \
53 ia64_save_scratch_fpregs(fr); \
54 ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), adjust_arg(tm), \
56 ia64_load_scratch_fpregs(fr); \
60 #define STUB_SET_TIME(prefix, adjust_arg) \
62 prefix##_set_time (efi_time_t *tm) \
64 struct ia64_fpreg fr[6]; \
67 ia64_save_scratch_fpregs(fr); \
68 ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), adjust_arg(tm)); \
69 ia64_load_scratch_fpregs(fr); \
73 #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \
75 prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm) \
77 struct ia64_fpreg fr[6]; \
80 ia64_save_scratch_fpregs(fr); \
81 ret = efi_call_##prefix((efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \
82 adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \
83 ia64_load_scratch_fpregs(fr); \
87 #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \
89 prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \
91 struct ia64_fpreg fr[6]; \
94 ia64_save_scratch_fpregs(fr); \
95 ret = efi_call_##prefix((efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \
96 enabled, adjust_arg(tm)); \
97 ia64_load_scratch_fpregs(fr); \
101 #define STUB_GET_VARIABLE(prefix, adjust_arg) \
102 static efi_status_t \
103 prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \
104 unsigned long *data_size, void *data) \
106 struct ia64_fpreg fr[6]; \
109 ia64_save_scratch_fpregs(fr); \
110 ret = efi_call_##prefix((efi_get_variable_t *) __va(runtime->get_variable), \
111 adjust_arg(name), adjust_arg(vendor), adjust_arg(attr), \
112 adjust_arg(data_size), adjust_arg(data)); \
113 ia64_load_scratch_fpregs(fr); \
117 #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \
118 static efi_status_t \
119 prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor) \
121 struct ia64_fpreg fr[6]; \
124 ia64_save_scratch_fpregs(fr); \
125 ret = efi_call_##prefix((efi_get_next_variable_t *) __va(runtime->get_next_variable), \
126 adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \
127 ia64_load_scratch_fpregs(fr); \
131 #define STUB_SET_VARIABLE(prefix, adjust_arg) \
132 static efi_status_t \
133 prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, unsigned long attr, \
134 unsigned long data_size, void *data) \
136 struct ia64_fpreg fr[6]; \
139 ia64_save_scratch_fpregs(fr); \
140 ret = efi_call_##prefix((efi_set_variable_t *) __va(runtime->set_variable), \
141 adjust_arg(name), adjust_arg(vendor), attr, data_size, \
143 ia64_load_scratch_fpregs(fr); \
147 #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \
148 static efi_status_t \
149 prefix##_get_next_high_mono_count (u32 *count) \
151 struct ia64_fpreg fr[6]; \
154 ia64_save_scratch_fpregs(fr); \
155 ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \
156 __va(runtime->get_next_high_mono_count), adjust_arg(count)); \
157 ia64_load_scratch_fpregs(fr); \
161 #define STUB_RESET_SYSTEM(prefix, adjust_arg) \
163 prefix##_reset_system (int reset_type, efi_status_t status, \
164 unsigned long data_size, efi_char16_t *data) \
166 struct ia64_fpreg fr[6]; \
168 ia64_save_scratch_fpregs(fr); \
169 efi_call_##prefix((efi_reset_system_t *) __va(runtime->reset_system), \
170 reset_type, status, data_size, adjust_arg(data)); \
171 /* should not return, but just in case... */ \
172 ia64_load_scratch_fpregs(fr); \
175 STUB_GET_TIME(phys, __pa)
176 STUB_SET_TIME(phys, __pa)
177 STUB_GET_WAKEUP_TIME(phys, __pa)
178 STUB_SET_WAKEUP_TIME(phys, __pa)
179 STUB_GET_VARIABLE(phys, __pa)
180 STUB_GET_NEXT_VARIABLE(phys, __pa)
181 STUB_SET_VARIABLE(phys, __pa)
182 STUB_GET_NEXT_HIGH_MONO_COUNT(phys, __pa)
183 STUB_RESET_SYSTEM(phys, __pa)
185 STUB_GET_TIME(virt, )
186 STUB_SET_TIME(virt, )
187 STUB_GET_WAKEUP_TIME(virt, )
188 STUB_SET_WAKEUP_TIME(virt, )
189 STUB_GET_VARIABLE(virt, )
190 STUB_GET_NEXT_VARIABLE(virt, )
191 STUB_SET_VARIABLE(virt, )
192 STUB_GET_NEXT_HIGH_MONO_COUNT(virt, )
193 STUB_RESET_SYSTEM(virt, )
196 efi_gettimeofday (struct timespec *ts)
200 memset(ts, 0, sizeof(ts));
201 if ((*efi.get_time)(&tm, 0) != EFI_SUCCESS)
204 ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
205 ts->tv_nsec = tm.nanosecond;
209 is_available_memory (efi_memory_desc_t *md)
211 if (!(md->attribute & EFI_MEMORY_WB))
215 case EFI_LOADER_CODE:
216 case EFI_LOADER_DATA:
217 case EFI_BOOT_SERVICES_CODE:
218 case EFI_BOOT_SERVICES_DATA:
219 case EFI_CONVENTIONAL_MEMORY:
226 * Trim descriptor MD so its starts at address START_ADDR. If the descriptor covers
227 * memory that is normally available to the kernel, issue a warning that some memory
231 trim_bottom (efi_memory_desc_t *md, u64 start_addr)
233 u64 num_skipped_pages;
235 if (md->phys_addr >= start_addr || !md->num_pages)
238 num_skipped_pages = (start_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
239 if (num_skipped_pages > md->num_pages)
240 num_skipped_pages = md->num_pages;
242 if (is_available_memory(md))
243 printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
244 "at 0x%lx\n", __FUNCTION__,
245 (num_skipped_pages << EFI_PAGE_SHIFT) >> 10,
246 md->phys_addr, start_addr - IA64_GRANULE_SIZE);
248 * NOTE: Don't set md->phys_addr to START_ADDR because that could cause the memory
249 * descriptor list to become unsorted. In such a case, md->num_pages will be
250 * zero, so the Right Thing will happen.
252 md->phys_addr += num_skipped_pages << EFI_PAGE_SHIFT;
253 md->num_pages -= num_skipped_pages;
257 trim_top (efi_memory_desc_t *md, u64 end_addr)
259 u64 num_dropped_pages, md_end_addr;
261 md_end_addr = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
263 if (md_end_addr <= end_addr || !md->num_pages)
266 num_dropped_pages = (md_end_addr - end_addr) >> EFI_PAGE_SHIFT;
267 if (num_dropped_pages > md->num_pages)
268 num_dropped_pages = md->num_pages;
270 if (is_available_memory(md))
271 printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
272 "at 0x%lx\n", __FUNCTION__,
273 (num_dropped_pages << EFI_PAGE_SHIFT) >> 10,
274 md->phys_addr, end_addr);
275 md->num_pages -= num_dropped_pages;
279 * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that
280 * has memory that is available for OS use.
283 efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
290 void *efi_map_start, *efi_map_end, *p, *q;
291 efi_memory_desc_t *md, *check_md;
292 u64 efi_desc_size, start, end, granule_addr, last_granule_addr, first_non_wb_addr = 0;
293 unsigned long total_mem = 0;
295 efi_map_start = __va(ia64_boot_param->efi_memmap);
296 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
297 efi_desc_size = ia64_boot_param->efi_memdesc_size;
299 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
302 /* skip over non-WB memory descriptors; that's all we're interested in... */
303 if (!(md->attribute & EFI_MEMORY_WB))
307 * granule_addr is the base of md's first granule.
308 * [granule_addr - first_non_wb_addr) is guaranteed to
309 * be contiguous WB memory.
311 granule_addr = md->phys_addr & ~(IA64_GRANULE_SIZE - 1);
312 first_non_wb_addr = max(first_non_wb_addr, granule_addr);
314 if (first_non_wb_addr < md->phys_addr) {
315 trim_bottom(md, granule_addr + IA64_GRANULE_SIZE);
316 granule_addr = md->phys_addr & ~(IA64_GRANULE_SIZE - 1);
317 first_non_wb_addr = max(first_non_wb_addr, granule_addr);
320 for (q = p; q < efi_map_end; q += efi_desc_size) {
323 if ((check_md->attribute & EFI_MEMORY_WB) &&
324 (check_md->phys_addr == first_non_wb_addr))
325 first_non_wb_addr += check_md->num_pages << EFI_PAGE_SHIFT;
327 break; /* non-WB or hole */
330 last_granule_addr = first_non_wb_addr & ~(IA64_GRANULE_SIZE - 1);
331 if (last_granule_addr < md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT))
332 trim_top(md, last_granule_addr);
334 if (is_available_memory(md)) {
335 if (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) > max_addr) {
336 if (md->phys_addr > max_addr)
338 md->num_pages = (max_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
341 if (total_mem >= mem_limit)
343 total_mem += (md->num_pages << EFI_PAGE_SHIFT);
344 if (total_mem > mem_limit)
345 md->num_pages -= ((total_mem - mem_limit) >> EFI_PAGE_SHIFT);
347 if (md->num_pages == 0)
350 curr.start = PAGE_OFFSET + md->phys_addr;
351 curr.end = curr.start + (md->num_pages << EFI_PAGE_SHIFT);
357 if (curr.start < prev.start)
358 printk(KERN_ERR "Oops: EFI memory table not ordered!\n");
360 if (prev.end == curr.start) {
361 /* merge two consecutive memory ranges */
364 start = PAGE_ALIGN(prev.start);
365 end = prev.end & PAGE_MASK;
366 if ((end > start) && (*callback)(start, end, arg) < 0)
374 start = PAGE_ALIGN(prev.start);
375 end = prev.end & PAGE_MASK;
377 (*callback)(start, end, arg);
382 * Look for the PAL_CODE region reported by EFI and maps it using an
383 * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor
384 * Abstraction Layer chapter 11 in ADAG
387 efi_map_pal_code (void)
389 void *efi_map_start, *efi_map_end, *p;
390 efi_memory_desc_t *md;
392 int pal_code_count = 0;
397 efi_map_start = __va(ia64_boot_param->efi_memmap);
398 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
399 efi_desc_size = ia64_boot_param->efi_memdesc_size;
401 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
403 if (md->type != EFI_PAL_CODE)
406 if (++pal_code_count > 1) {
407 printk(KERN_ERR "Too many EFI Pal Code memory ranges, dropped @ %lx\n",
412 * The only ITLB entry in region 7 that is used is the one installed by
413 * __start(). That entry covers a 64MB range.
415 mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
416 vaddr = PAGE_OFFSET + md->phys_addr;
419 * We must check that the PAL mapping won't overlap with the kernel
422 * PAL code is guaranteed to be aligned on a power of 2 between 4k and
423 * 256KB and that only one ITR is needed to map it. This implies that the
424 * PAL code is always aligned on its size, i.e., the closest matching page
425 * size supported by the TLB. Therefore PAL code is guaranteed never to
426 * cross a 64MB unless it is bigger than 64MB (very unlikely!). So for
427 * now the following test is enough to determine whether or not we need a
428 * dedicated ITR for the PAL code.
430 if ((vaddr & mask) == (KERNEL_START & mask)) {
431 printk(KERN_INFO "%s: no need to install ITR for PAL code\n",
436 if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE)
437 panic("Woah! PAL code size bigger than a granule!");
439 mask = ~((1 << IA64_GRANULE_SHIFT) - 1);
441 printk(KERN_INFO "CPU %d: mapping PAL code [0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
442 smp_processor_id(), md->phys_addr,
443 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
444 vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
448 * Cannot write to CRx with PSR.ic=1
450 psr = ia64_clear_ic();
451 ia64_itr(0x1, IA64_TR_PALCODE, vaddr & mask,
452 pte_val(pfn_pte(md->phys_addr >> PAGE_SHIFT, PAGE_KERNEL)),
454 ia64_set_psr(psr); /* restore psr */
457 cpu = smp_processor_id();
459 /* insert this TR into our list for MCA recovery purposes */
460 ia64_mca_tlb_list[cpu].pal_base = vaddr & mask;
461 ia64_mca_tlb_list[cpu].pal_paddr = pte_val(mk_pte_phys(md->phys_addr, PAGE_KERNEL));
468 void *efi_map_start, *efi_map_end;
469 efi_config_table_t *config_tables;
472 char *cp, *end, vendor[100] = "unknown";
473 extern char saved_command_line[];
476 /* it's too early to be able to use the standard kernel command line support... */
477 for (cp = saved_command_line; *cp; ) {
478 if (memcmp(cp, "mem=", 4) == 0) {
480 mem_limit = memparse(cp, &end) - 2;
484 } else if (memcmp(cp, "max_addr=", 9) == 0) {
486 max_addr = memparse(cp, &end) - 1;
491 while (*cp != ' ' && *cp)
497 if (max_addr != ~0UL)
498 printk(KERN_INFO "Ignoring memory above %luMB\n", max_addr >> 20);
500 efi.systab = __va(ia64_boot_param->efi_systab);
503 * Verify the EFI Table
505 if (efi.systab == NULL)
506 panic("Woah! Can't find EFI system table.\n");
507 if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
508 panic("Woah! EFI system table signature incorrect\n");
509 if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0)
510 printk(KERN_WARNING "Warning: EFI system table major version mismatch: "
511 "got %d.%02d, expected %d.%02d\n",
512 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff,
513 EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff);
515 config_tables = __va(efi.systab->tables);
517 /* Show what we know for posterity */
518 c16 = __va(efi.systab->fw_vendor);
520 for (i = 0;i < (int) sizeof(vendor) && *c16; ++i)
525 printk(KERN_INFO "EFI v%u.%.02u by %s:",
526 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor);
528 for (i = 0; i < (int) efi.systab->nr_tables; i++) {
529 if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
530 efi.mps = __va(config_tables[i].table);
531 printk(" MPS=0x%lx", config_tables[i].table);
532 } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
533 efi.acpi20 = __va(config_tables[i].table);
534 printk(" ACPI 2.0=0x%lx", config_tables[i].table);
535 } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
536 efi.acpi = __va(config_tables[i].table);
537 printk(" ACPI=0x%lx", config_tables[i].table);
538 } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
539 efi.smbios = __va(config_tables[i].table);
540 printk(" SMBIOS=0x%lx", config_tables[i].table);
541 } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
542 efi.sal_systab = __va(config_tables[i].table);
543 printk(" SALsystab=0x%lx", config_tables[i].table);
544 } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
545 efi.hcdp = __va(config_tables[i].table);
546 printk(" HCDP=0x%lx", config_tables[i].table);
551 runtime = __va(efi.systab->runtime);
552 efi.get_time = phys_get_time;
553 efi.set_time = phys_set_time;
554 efi.get_wakeup_time = phys_get_wakeup_time;
555 efi.set_wakeup_time = phys_set_wakeup_time;
556 efi.get_variable = phys_get_variable;
557 efi.get_next_variable = phys_get_next_variable;
558 efi.set_variable = phys_set_variable;
559 efi.get_next_high_mono_count = phys_get_next_high_mono_count;
560 efi.reset_system = phys_reset_system;
562 efi_map_start = __va(ia64_boot_param->efi_memmap);
563 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
564 efi_desc_size = ia64_boot_param->efi_memdesc_size;
567 /* print EFI memory map: */
569 efi_memory_desc_t *md;
572 for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) {
574 printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n",
575 i, md->type, md->attribute, md->phys_addr,
576 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
577 md->num_pages >> (20 - EFI_PAGE_SHIFT));
583 efi_enter_virtual_mode();
587 efi_enter_virtual_mode (void)
589 void *efi_map_start, *efi_map_end, *p;
590 efi_memory_desc_t *md;
594 efi_map_start = __va(ia64_boot_param->efi_memmap);
595 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
596 efi_desc_size = ia64_boot_param->efi_memdesc_size;
598 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
600 if (md->attribute & EFI_MEMORY_RUNTIME) {
602 * Some descriptors have multiple bits set, so the order of
603 * the tests is relevant.
605 if (md->attribute & EFI_MEMORY_WB) {
606 md->virt_addr = (u64) __va(md->phys_addr);
607 } else if (md->attribute & EFI_MEMORY_UC) {
608 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
609 } else if (md->attribute & EFI_MEMORY_WC) {
611 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
617 printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
618 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
620 } else if (md->attribute & EFI_MEMORY_WT) {
622 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
623 | _PAGE_D | _PAGE_MA_WT
627 printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
628 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
634 status = efi_call_phys(__va(runtime->set_virtual_address_map),
635 ia64_boot_param->efi_memmap_size,
636 efi_desc_size, ia64_boot_param->efi_memdesc_version,
637 ia64_boot_param->efi_memmap);
638 if (status != EFI_SUCCESS) {
639 printk(KERN_WARNING "warning: unable to switch EFI into virtual mode "
640 "(status=%lu)\n", status);
645 * Now that EFI is in virtual mode, we call the EFI functions more efficiently:
647 efi.get_time = virt_get_time;
648 efi.set_time = virt_set_time;
649 efi.get_wakeup_time = virt_get_wakeup_time;
650 efi.set_wakeup_time = virt_set_wakeup_time;
651 efi.get_variable = virt_get_variable;
652 efi.get_next_variable = virt_get_next_variable;
653 efi.set_variable = virt_set_variable;
654 efi.get_next_high_mono_count = virt_get_next_high_mono_count;
655 efi.reset_system = virt_reset_system;
659 * Walk the EFI memory map looking for the I/O port range. There can only be one entry of
660 * this type, other I/O port ranges should be described via ACPI.
663 efi_get_iobase (void)
665 void *efi_map_start, *efi_map_end, *p;
666 efi_memory_desc_t *md;
669 efi_map_start = __va(ia64_boot_param->efi_memmap);
670 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
671 efi_desc_size = ia64_boot_param->efi_memdesc_size;
673 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
675 if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
676 if (md->attribute & EFI_MEMORY_UC)
677 return md->phys_addr;
684 efi_mem_type (unsigned long phys_addr)
686 void *efi_map_start, *efi_map_end, *p;
687 efi_memory_desc_t *md;
690 efi_map_start = __va(ia64_boot_param->efi_memmap);
691 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
692 efi_desc_size = ia64_boot_param->efi_memdesc_size;
694 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
697 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
704 efi_mem_attributes (unsigned long phys_addr)
706 void *efi_map_start, *efi_map_end, *p;
707 efi_memory_desc_t *md;
710 efi_map_start = __va(ia64_boot_param->efi_memmap);
711 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
712 efi_desc_size = ia64_boot_param->efi_memdesc_size;
714 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
717 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
718 return md->attribute;
724 valid_phys_addr_range (unsigned long phys_addr, unsigned long *size)
726 void *efi_map_start, *efi_map_end, *p;
727 efi_memory_desc_t *md;
730 efi_map_start = __va(ia64_boot_param->efi_memmap);
731 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
732 efi_desc_size = ia64_boot_param->efi_memdesc_size;
734 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
737 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) {
738 if (!(md->attribute & EFI_MEMORY_WB))
741 if (*size > md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr)
742 *size = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr;
750 efi_uart_console_only(void)
753 char *s, name[] = "ConOut";
754 efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID;
755 efi_char16_t *utf16, name_utf16[32];
756 unsigned char data[1024];
757 unsigned long size = sizeof(data);
758 struct efi_generic_dev_path *hdr, *end_addr;
761 /* Convert to UTF-16 */
765 *utf16++ = *s++ & 0x7f;
768 status = efi.get_variable(name_utf16, &guid, NULL, &size, data);
769 if (status != EFI_SUCCESS) {
770 printk(KERN_ERR "No EFI %s variable?\n", name);
774 hdr = (struct efi_generic_dev_path *) data;
775 end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size);
776 while (hdr < end_addr) {
777 if (hdr->type == EFI_DEV_MSG &&
778 hdr->sub_type == EFI_DEV_MSG_UART)
780 else if (hdr->type == EFI_DEV_END_PATH ||
781 hdr->type == EFI_DEV_END_PATH2) {
784 if (hdr->sub_type == EFI_DEV_END_ENTIRE)
788 hdr = (struct efi_generic_dev_path *) ((u8 *) hdr + hdr->length);
790 printk(KERN_ERR "Malformed %s value\n", name);