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]; \
51 efi_time_cap_t *atc = 0; \
55 atc = adjust_arg(tc); \
56 ia64_save_scratch_fpregs(fr); \
57 ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), adjust_arg(tm), atc); \
58 ia64_load_scratch_fpregs(fr); \
62 #define STUB_SET_TIME(prefix, adjust_arg) \
64 prefix##_set_time (efi_time_t *tm) \
66 struct ia64_fpreg fr[6]; \
69 ia64_save_scratch_fpregs(fr); \
70 ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), adjust_arg(tm)); \
71 ia64_load_scratch_fpregs(fr); \
75 #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \
77 prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm) \
79 struct ia64_fpreg fr[6]; \
82 ia64_save_scratch_fpregs(fr); \
83 ret = efi_call_##prefix((efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \
84 adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \
85 ia64_load_scratch_fpregs(fr); \
89 #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \
91 prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \
93 struct ia64_fpreg fr[6]; \
94 efi_time_t *atm = 0; \
98 atm = adjust_arg(tm); \
99 ia64_save_scratch_fpregs(fr); \
100 ret = efi_call_##prefix((efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \
102 ia64_load_scratch_fpregs(fr); \
106 #define STUB_GET_VARIABLE(prefix, adjust_arg) \
107 static efi_status_t \
108 prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \
109 unsigned long *data_size, void *data) \
111 struct ia64_fpreg fr[6]; \
116 aattr = adjust_arg(attr); \
117 ia64_save_scratch_fpregs(fr); \
118 ret = efi_call_##prefix((efi_get_variable_t *) __va(runtime->get_variable), \
119 adjust_arg(name), adjust_arg(vendor), aattr, \
120 adjust_arg(data_size), adjust_arg(data)); \
121 ia64_load_scratch_fpregs(fr); \
125 #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \
126 static efi_status_t \
127 prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor) \
129 struct ia64_fpreg fr[6]; \
132 ia64_save_scratch_fpregs(fr); \
133 ret = efi_call_##prefix((efi_get_next_variable_t *) __va(runtime->get_next_variable), \
134 adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \
135 ia64_load_scratch_fpregs(fr); \
139 #define STUB_SET_VARIABLE(prefix, adjust_arg) \
140 static efi_status_t \
141 prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, unsigned long attr, \
142 unsigned long data_size, void *data) \
144 struct ia64_fpreg fr[6]; \
147 ia64_save_scratch_fpregs(fr); \
148 ret = efi_call_##prefix((efi_set_variable_t *) __va(runtime->set_variable), \
149 adjust_arg(name), adjust_arg(vendor), attr, data_size, \
151 ia64_load_scratch_fpregs(fr); \
155 #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \
156 static efi_status_t \
157 prefix##_get_next_high_mono_count (u32 *count) \
159 struct ia64_fpreg fr[6]; \
162 ia64_save_scratch_fpregs(fr); \
163 ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \
164 __va(runtime->get_next_high_mono_count), adjust_arg(count)); \
165 ia64_load_scratch_fpregs(fr); \
169 #define STUB_RESET_SYSTEM(prefix, adjust_arg) \
171 prefix##_reset_system (int reset_type, efi_status_t status, \
172 unsigned long data_size, efi_char16_t *data) \
174 struct ia64_fpreg fr[6]; \
175 efi_char16_t *adata = 0; \
178 adata = adjust_arg(data); \
180 ia64_save_scratch_fpregs(fr); \
181 efi_call_##prefix((efi_reset_system_t *) __va(runtime->reset_system), \
182 reset_type, status, data_size, adata); \
183 /* should not return, but just in case... */ \
184 ia64_load_scratch_fpregs(fr); \
187 #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg))
189 STUB_GET_TIME(phys, phys_ptr)
190 STUB_SET_TIME(phys, phys_ptr)
191 STUB_GET_WAKEUP_TIME(phys, phys_ptr)
192 STUB_SET_WAKEUP_TIME(phys, phys_ptr)
193 STUB_GET_VARIABLE(phys, phys_ptr)
194 STUB_GET_NEXT_VARIABLE(phys, phys_ptr)
195 STUB_SET_VARIABLE(phys, phys_ptr)
196 STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr)
197 STUB_RESET_SYSTEM(phys, phys_ptr)
201 STUB_GET_TIME(virt, id)
202 STUB_SET_TIME(virt, id)
203 STUB_GET_WAKEUP_TIME(virt, id)
204 STUB_SET_WAKEUP_TIME(virt, id)
205 STUB_GET_VARIABLE(virt, id)
206 STUB_GET_NEXT_VARIABLE(virt, id)
207 STUB_SET_VARIABLE(virt, id)
208 STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id)
209 STUB_RESET_SYSTEM(virt, id)
212 efi_gettimeofday (struct timespec *ts)
216 memset(ts, 0, sizeof(ts));
217 if ((*efi.get_time)(&tm, 0) != EFI_SUCCESS)
220 ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
221 ts->tv_nsec = tm.nanosecond;
225 is_available_memory (efi_memory_desc_t *md)
227 if (!(md->attribute & EFI_MEMORY_WB))
231 case EFI_LOADER_CODE:
232 case EFI_LOADER_DATA:
233 case EFI_BOOT_SERVICES_CODE:
234 case EFI_BOOT_SERVICES_DATA:
235 case EFI_CONVENTIONAL_MEMORY:
242 * Trim descriptor MD so its starts at address START_ADDR. If the descriptor covers
243 * memory that is normally available to the kernel, issue a warning that some memory
247 trim_bottom (efi_memory_desc_t *md, u64 start_addr)
249 u64 num_skipped_pages;
251 if (md->phys_addr >= start_addr || !md->num_pages)
254 num_skipped_pages = (start_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
255 if (num_skipped_pages > md->num_pages)
256 num_skipped_pages = md->num_pages;
258 if (is_available_memory(md))
259 printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
260 "at 0x%lx\n", __FUNCTION__,
261 (num_skipped_pages << EFI_PAGE_SHIFT) >> 10,
262 md->phys_addr, start_addr - IA64_GRANULE_SIZE);
264 * NOTE: Don't set md->phys_addr to START_ADDR because that could cause the memory
265 * descriptor list to become unsorted. In such a case, md->num_pages will be
266 * zero, so the Right Thing will happen.
268 md->phys_addr += num_skipped_pages << EFI_PAGE_SHIFT;
269 md->num_pages -= num_skipped_pages;
273 trim_top (efi_memory_desc_t *md, u64 end_addr)
275 u64 num_dropped_pages, md_end_addr;
277 md_end_addr = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
279 if (md_end_addr <= end_addr || !md->num_pages)
282 num_dropped_pages = (md_end_addr - end_addr) >> EFI_PAGE_SHIFT;
283 if (num_dropped_pages > md->num_pages)
284 num_dropped_pages = md->num_pages;
286 if (is_available_memory(md))
287 printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
288 "at 0x%lx\n", __FUNCTION__,
289 (num_dropped_pages << EFI_PAGE_SHIFT) >> 10,
290 md->phys_addr, end_addr);
291 md->num_pages -= num_dropped_pages;
295 * Walks the EFI memory map and calls CALLBACK once for each EFI memory descriptor that
296 * has memory that is available for OS use.
299 efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
306 void *efi_map_start, *efi_map_end, *p, *q;
307 efi_memory_desc_t *md, *check_md;
308 u64 efi_desc_size, start, end, granule_addr, last_granule_addr, first_non_wb_addr = 0;
309 unsigned long total_mem = 0;
311 efi_map_start = __va(ia64_boot_param->efi_memmap);
312 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
313 efi_desc_size = ia64_boot_param->efi_memdesc_size;
315 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
318 /* skip over non-WB memory descriptors; that's all we're interested in... */
319 if (!(md->attribute & EFI_MEMORY_WB))
323 * granule_addr is the base of md's first granule.
324 * [granule_addr - first_non_wb_addr) is guaranteed to
325 * be contiguous WB memory.
327 granule_addr = md->phys_addr & ~(IA64_GRANULE_SIZE - 1);
328 first_non_wb_addr = max(first_non_wb_addr, granule_addr);
330 if (first_non_wb_addr < md->phys_addr) {
331 trim_bottom(md, granule_addr + IA64_GRANULE_SIZE);
332 granule_addr = md->phys_addr & ~(IA64_GRANULE_SIZE - 1);
333 first_non_wb_addr = max(first_non_wb_addr, granule_addr);
336 for (q = p; q < efi_map_end; q += efi_desc_size) {
339 if ((check_md->attribute & EFI_MEMORY_WB) &&
340 (check_md->phys_addr == first_non_wb_addr))
341 first_non_wb_addr += check_md->num_pages << EFI_PAGE_SHIFT;
343 break; /* non-WB or hole */
346 last_granule_addr = first_non_wb_addr & ~(IA64_GRANULE_SIZE - 1);
347 if (last_granule_addr < md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT))
348 trim_top(md, last_granule_addr);
350 if (is_available_memory(md)) {
351 if (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) > max_addr) {
352 if (md->phys_addr > max_addr)
354 md->num_pages = (max_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
357 if (total_mem >= mem_limit)
359 total_mem += (md->num_pages << EFI_PAGE_SHIFT);
360 if (total_mem > mem_limit)
361 md->num_pages -= ((total_mem - mem_limit) >> EFI_PAGE_SHIFT);
363 if (md->num_pages == 0)
366 curr.start = PAGE_OFFSET + md->phys_addr;
367 curr.end = curr.start + (md->num_pages << EFI_PAGE_SHIFT);
373 if (curr.start < prev.start)
374 printk(KERN_ERR "Oops: EFI memory table not ordered!\n");
376 if (prev.end == curr.start) {
377 /* merge two consecutive memory ranges */
380 start = PAGE_ALIGN(prev.start);
381 end = prev.end & PAGE_MASK;
382 if ((end > start) && (*callback)(start, end, arg) < 0)
390 start = PAGE_ALIGN(prev.start);
391 end = prev.end & PAGE_MASK;
393 (*callback)(start, end, arg);
398 * Look for the PAL_CODE region reported by EFI and maps it using an
399 * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor
400 * Abstraction Layer chapter 11 in ADAG
403 efi_map_pal_code (void)
405 void *efi_map_start, *efi_map_end, *p;
406 efi_memory_desc_t *md;
408 int pal_code_count = 0;
413 efi_map_start = __va(ia64_boot_param->efi_memmap);
414 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
415 efi_desc_size = ia64_boot_param->efi_memdesc_size;
417 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
419 if (md->type != EFI_PAL_CODE)
422 if (++pal_code_count > 1) {
423 printk(KERN_ERR "Too many EFI Pal Code memory ranges, dropped @ %lx\n",
428 * The only ITLB entry in region 7 that is used is the one installed by
429 * __start(). That entry covers a 64MB range.
431 mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
432 vaddr = PAGE_OFFSET + md->phys_addr;
435 * We must check that the PAL mapping won't overlap with the kernel
438 * PAL code is guaranteed to be aligned on a power of 2 between 4k and
439 * 256KB and that only one ITR is needed to map it. This implies that the
440 * PAL code is always aligned on its size, i.e., the closest matching page
441 * size supported by the TLB. Therefore PAL code is guaranteed never to
442 * cross a 64MB unless it is bigger than 64MB (very unlikely!). So for
443 * now the following test is enough to determine whether or not we need a
444 * dedicated ITR for the PAL code.
446 if ((vaddr & mask) == (KERNEL_START & mask)) {
447 printk(KERN_INFO "%s: no need to install ITR for PAL code\n",
452 if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE)
453 panic("Woah! PAL code size bigger than a granule!");
455 mask = ~((1 << IA64_GRANULE_SHIFT) - 1);
457 printk(KERN_INFO "CPU %d: mapping PAL code [0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
458 smp_processor_id(), md->phys_addr,
459 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
460 vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
464 * Cannot write to CRx with PSR.ic=1
466 psr = ia64_clear_ic();
467 ia64_itr(0x1, IA64_TR_PALCODE, vaddr & mask,
468 pte_val(pfn_pte(md->phys_addr >> PAGE_SHIFT, PAGE_KERNEL)),
470 ia64_set_psr(psr); /* restore psr */
473 cpu = smp_processor_id();
475 /* insert this TR into our list for MCA recovery purposes */
476 ia64_mca_tlb_list[cpu].pal_base = vaddr & mask;
477 ia64_mca_tlb_list[cpu].pal_paddr = pte_val(mk_pte_phys(md->phys_addr, PAGE_KERNEL));
484 void *efi_map_start, *efi_map_end;
485 efi_config_table_t *config_tables;
488 char *cp, *end, vendor[100] = "unknown";
489 extern char saved_command_line[];
492 /* it's too early to be able to use the standard kernel command line support... */
493 for (cp = saved_command_line; *cp; ) {
494 if (memcmp(cp, "mem=", 4) == 0) {
496 mem_limit = memparse(cp, &end) - 2;
500 } else if (memcmp(cp, "max_addr=", 9) == 0) {
502 max_addr = memparse(cp, &end) - 1;
507 while (*cp != ' ' && *cp)
513 if (max_addr != ~0UL)
514 printk(KERN_INFO "Ignoring memory above %luMB\n", max_addr >> 20);
516 efi.systab = __va(ia64_boot_param->efi_systab);
519 * Verify the EFI Table
521 if (efi.systab == NULL)
522 panic("Woah! Can't find EFI system table.\n");
523 if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
524 panic("Woah! EFI system table signature incorrect\n");
525 if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0)
526 printk(KERN_WARNING "Warning: EFI system table major version mismatch: "
527 "got %d.%02d, expected %d.%02d\n",
528 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff,
529 EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff);
531 config_tables = __va(efi.systab->tables);
533 /* Show what we know for posterity */
534 c16 = __va(efi.systab->fw_vendor);
536 for (i = 0;i < (int) sizeof(vendor) && *c16; ++i)
541 printk(KERN_INFO "EFI v%u.%.02u by %s:",
542 efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor);
544 for (i = 0; i < (int) efi.systab->nr_tables; i++) {
545 if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
546 efi.mps = __va(config_tables[i].table);
547 printk(" MPS=0x%lx", config_tables[i].table);
548 } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
549 efi.acpi20 = __va(config_tables[i].table);
550 printk(" ACPI 2.0=0x%lx", config_tables[i].table);
551 } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
552 efi.acpi = __va(config_tables[i].table);
553 printk(" ACPI=0x%lx", config_tables[i].table);
554 } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
555 efi.smbios = __va(config_tables[i].table);
556 printk(" SMBIOS=0x%lx", config_tables[i].table);
557 } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
558 efi.sal_systab = __va(config_tables[i].table);
559 printk(" SALsystab=0x%lx", config_tables[i].table);
560 } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
561 efi.hcdp = __va(config_tables[i].table);
562 printk(" HCDP=0x%lx", config_tables[i].table);
567 runtime = __va(efi.systab->runtime);
568 efi.get_time = phys_get_time;
569 efi.set_time = phys_set_time;
570 efi.get_wakeup_time = phys_get_wakeup_time;
571 efi.set_wakeup_time = phys_set_wakeup_time;
572 efi.get_variable = phys_get_variable;
573 efi.get_next_variable = phys_get_next_variable;
574 efi.set_variable = phys_set_variable;
575 efi.get_next_high_mono_count = phys_get_next_high_mono_count;
576 efi.reset_system = phys_reset_system;
578 efi_map_start = __va(ia64_boot_param->efi_memmap);
579 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
580 efi_desc_size = ia64_boot_param->efi_memdesc_size;
583 /* print EFI memory map: */
585 efi_memory_desc_t *md;
588 for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) {
590 printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n",
591 i, md->type, md->attribute, md->phys_addr,
592 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
593 md->num_pages >> (20 - EFI_PAGE_SHIFT));
599 efi_enter_virtual_mode();
603 efi_enter_virtual_mode (void)
605 void *efi_map_start, *efi_map_end, *p;
606 efi_memory_desc_t *md;
610 efi_map_start = __va(ia64_boot_param->efi_memmap);
611 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
612 efi_desc_size = ia64_boot_param->efi_memdesc_size;
614 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
616 if (md->attribute & EFI_MEMORY_RUNTIME) {
618 * Some descriptors have multiple bits set, so the order of
619 * the tests is relevant.
621 if (md->attribute & EFI_MEMORY_WB) {
622 md->virt_addr = (u64) __va(md->phys_addr);
623 } else if (md->attribute & EFI_MEMORY_UC) {
624 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
625 } else if (md->attribute & EFI_MEMORY_WC) {
627 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
633 printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
634 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
636 } else if (md->attribute & EFI_MEMORY_WT) {
638 md->virt_addr = ia64_remap(md->phys_addr, (_PAGE_A | _PAGE_P
639 | _PAGE_D | _PAGE_MA_WT
643 printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
644 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
650 status = efi_call_phys(__va(runtime->set_virtual_address_map),
651 ia64_boot_param->efi_memmap_size,
652 efi_desc_size, ia64_boot_param->efi_memdesc_version,
653 ia64_boot_param->efi_memmap);
654 if (status != EFI_SUCCESS) {
655 printk(KERN_WARNING "warning: unable to switch EFI into virtual mode "
656 "(status=%lu)\n", status);
661 * Now that EFI is in virtual mode, we call the EFI functions more efficiently:
663 efi.get_time = virt_get_time;
664 efi.set_time = virt_set_time;
665 efi.get_wakeup_time = virt_get_wakeup_time;
666 efi.set_wakeup_time = virt_set_wakeup_time;
667 efi.get_variable = virt_get_variable;
668 efi.get_next_variable = virt_get_next_variable;
669 efi.set_variable = virt_set_variable;
670 efi.get_next_high_mono_count = virt_get_next_high_mono_count;
671 efi.reset_system = virt_reset_system;
675 * Walk the EFI memory map looking for the I/O port range. There can only be one entry of
676 * this type, other I/O port ranges should be described via ACPI.
679 efi_get_iobase (void)
681 void *efi_map_start, *efi_map_end, *p;
682 efi_memory_desc_t *md;
685 efi_map_start = __va(ia64_boot_param->efi_memmap);
686 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
687 efi_desc_size = ia64_boot_param->efi_memdesc_size;
689 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
691 if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
692 if (md->attribute & EFI_MEMORY_UC)
693 return md->phys_addr;
700 efi_mem_type (unsigned long phys_addr)
702 void *efi_map_start, *efi_map_end, *p;
703 efi_memory_desc_t *md;
706 efi_map_start = __va(ia64_boot_param->efi_memmap);
707 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
708 efi_desc_size = ia64_boot_param->efi_memdesc_size;
710 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
713 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
720 efi_mem_attributes (unsigned long phys_addr)
722 void *efi_map_start, *efi_map_end, *p;
723 efi_memory_desc_t *md;
726 efi_map_start = __va(ia64_boot_param->efi_memmap);
727 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
728 efi_desc_size = ia64_boot_param->efi_memdesc_size;
730 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
733 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
734 return md->attribute;
740 valid_phys_addr_range (unsigned long phys_addr, unsigned long *size)
742 void *efi_map_start, *efi_map_end, *p;
743 efi_memory_desc_t *md;
746 efi_map_start = __va(ia64_boot_param->efi_memmap);
747 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
748 efi_desc_size = ia64_boot_param->efi_memdesc_size;
750 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
753 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) {
754 if (!(md->attribute & EFI_MEMORY_WB))
757 if (*size > md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr)
758 *size = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr;
766 efi_uart_console_only(void)
769 char *s, name[] = "ConOut";
770 efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID;
771 efi_char16_t *utf16, name_utf16[32];
772 unsigned char data[1024];
773 unsigned long size = sizeof(data);
774 struct efi_generic_dev_path *hdr, *end_addr;
777 /* Convert to UTF-16 */
781 *utf16++ = *s++ & 0x7f;
784 status = efi.get_variable(name_utf16, &guid, NULL, &size, data);
785 if (status != EFI_SUCCESS) {
786 printk(KERN_ERR "No EFI %s variable?\n", name);
790 hdr = (struct efi_generic_dev_path *) data;
791 end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size);
792 while (hdr < end_addr) {
793 if (hdr->type == EFI_DEV_MSG &&
794 hdr->sub_type == EFI_DEV_MSG_UART)
796 else if (hdr->type == EFI_DEV_END_PATH ||
797 hdr->type == EFI_DEV_END_PATH2) {
800 if (hdr->sub_type == EFI_DEV_END_ENTIRE)
804 hdr = (struct efi_generic_dev_path *) ((u8 *) hdr + hdr->length);
806 printk(KERN_ERR "Malformed %s value\n", name);