mirror of https://gitee.com/openkylin/linux.git
1341 lines
35 KiB
C
1341 lines
35 KiB
C
/*
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* Extensible Firmware Interface
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*
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* Based on Extensible Firmware Interface Specification version 0.9
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* April 30, 1999
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 1999-2003 Hewlett-Packard Co.
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Stephane Eranian <eranian@hpl.hp.com>
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* (c) Copyright 2006 Hewlett-Packard Development Company, L.P.
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* All EFI Runtime Services are not implemented yet as EFI only
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* supports physical mode addressing on SoftSDV. This is to be fixed
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* in a future version. --drummond 1999-07-20
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*
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* Implemented EFI runtime services and virtual mode calls. --davidm
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*
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* Goutham Rao: <goutham.rao@intel.com>
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* Skip non-WB memory and ignore empty memory ranges.
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*/
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#include <linux/module.h>
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#include <linux/bootmem.h>
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#include <linux/crash_dump.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <linux/efi.h>
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#include <linux/kexec.h>
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#include <linux/mm.h>
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#include <asm/io.h>
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#include <asm/kregs.h>
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#include <asm/meminit.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/mca.h>
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#include <asm/setup.h>
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#include <asm/tlbflush.h>
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#define EFI_DEBUG 0
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static __initdata unsigned long palo_phys;
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static __initdata efi_config_table_type_t arch_tables[] = {
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{PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID, "PALO", &palo_phys},
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{NULL_GUID, NULL, 0},
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};
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extern efi_status_t efi_call_phys (void *, ...);
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static efi_runtime_services_t *runtime;
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static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL;
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#define efi_call_virt(f, args...) (*(f))(args)
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#define STUB_GET_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_time_cap_t *atc = NULL; \
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efi_status_t ret; \
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\
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if (tc) \
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atc = adjust_arg(tc); \
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \
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adjust_arg(tm), atc); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_SET_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_set_time (efi_time_t *tm) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \
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adjust_arg(tm)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \
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efi_time_t *tm) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix( \
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(efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \
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adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_time_t *atm = NULL; \
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efi_status_t ret; \
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\
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if (tm) \
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atm = adjust_arg(tm); \
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix( \
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(efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \
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enabled, atm); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_VARIABLE(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \
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unsigned long *data_size, void *data) \
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{ \
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struct ia64_fpreg fr[6]; \
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u32 *aattr = NULL; \
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efi_status_t ret; \
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\
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if (attr) \
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aattr = adjust_arg(attr); \
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix( \
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(efi_get_variable_t *) __va(runtime->get_variable), \
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adjust_arg(name), adjust_arg(vendor), aattr, \
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adjust_arg(data_size), adjust_arg(data)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \
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efi_guid_t *vendor) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix( \
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(efi_get_next_variable_t *) __va(runtime->get_next_variable), \
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adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_SET_VARIABLE(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \
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u32 attr, unsigned long data_size, \
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void *data) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix( \
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(efi_set_variable_t *) __va(runtime->set_variable), \
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adjust_arg(name), adjust_arg(vendor), attr, data_size, \
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adjust_arg(data)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \
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static efi_status_t \
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prefix##_get_next_high_mono_count (u32 *count) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_status_t ret; \
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\
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ia64_save_scratch_fpregs(fr); \
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ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \
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__va(runtime->get_next_high_mono_count), \
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adjust_arg(count)); \
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ia64_load_scratch_fpregs(fr); \
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return ret; \
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}
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#define STUB_RESET_SYSTEM(prefix, adjust_arg) \
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static void \
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prefix##_reset_system (int reset_type, efi_status_t status, \
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unsigned long data_size, efi_char16_t *data) \
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{ \
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struct ia64_fpreg fr[6]; \
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efi_char16_t *adata = NULL; \
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\
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if (data) \
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adata = adjust_arg(data); \
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\
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ia64_save_scratch_fpregs(fr); \
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efi_call_##prefix( \
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(efi_reset_system_t *) __va(runtime->reset_system), \
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reset_type, status, data_size, adata); \
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/* should not return, but just in case... */ \
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ia64_load_scratch_fpregs(fr); \
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}
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#define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg))
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STUB_GET_TIME(phys, phys_ptr)
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STUB_SET_TIME(phys, phys_ptr)
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STUB_GET_WAKEUP_TIME(phys, phys_ptr)
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STUB_SET_WAKEUP_TIME(phys, phys_ptr)
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STUB_GET_VARIABLE(phys, phys_ptr)
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STUB_GET_NEXT_VARIABLE(phys, phys_ptr)
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STUB_SET_VARIABLE(phys, phys_ptr)
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STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr)
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STUB_RESET_SYSTEM(phys, phys_ptr)
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#define id(arg) arg
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STUB_GET_TIME(virt, id)
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STUB_SET_TIME(virt, id)
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STUB_GET_WAKEUP_TIME(virt, id)
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STUB_SET_WAKEUP_TIME(virt, id)
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STUB_GET_VARIABLE(virt, id)
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STUB_GET_NEXT_VARIABLE(virt, id)
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STUB_SET_VARIABLE(virt, id)
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STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id)
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STUB_RESET_SYSTEM(virt, id)
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void
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efi_gettimeofday (struct timespec *ts)
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{
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efi_time_t tm;
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if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) {
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memset(ts, 0, sizeof(*ts));
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return;
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}
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ts->tv_sec = mktime(tm.year, tm.month, tm.day,
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tm.hour, tm.minute, tm.second);
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ts->tv_nsec = tm.nanosecond;
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}
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static int
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is_memory_available (efi_memory_desc_t *md)
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{
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if (!(md->attribute & EFI_MEMORY_WB))
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return 0;
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switch (md->type) {
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case EFI_LOADER_CODE:
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case EFI_LOADER_DATA:
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case EFI_BOOT_SERVICES_CODE:
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case EFI_BOOT_SERVICES_DATA:
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case EFI_CONVENTIONAL_MEMORY:
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return 1;
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}
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return 0;
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}
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typedef struct kern_memdesc {
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u64 attribute;
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u64 start;
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u64 num_pages;
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} kern_memdesc_t;
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static kern_memdesc_t *kern_memmap;
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#define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT)
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static inline u64
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kmd_end(kern_memdesc_t *kmd)
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{
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return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT));
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}
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static inline u64
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efi_md_end(efi_memory_desc_t *md)
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{
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return (md->phys_addr + efi_md_size(md));
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}
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static inline int
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efi_wb(efi_memory_desc_t *md)
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{
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return (md->attribute & EFI_MEMORY_WB);
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}
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static inline int
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efi_uc(efi_memory_desc_t *md)
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{
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return (md->attribute & EFI_MEMORY_UC);
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}
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static void
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walk (efi_freemem_callback_t callback, void *arg, u64 attr)
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{
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kern_memdesc_t *k;
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u64 start, end, voff;
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voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET;
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for (k = kern_memmap; k->start != ~0UL; k++) {
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if (k->attribute != attr)
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continue;
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start = PAGE_ALIGN(k->start);
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end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK;
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if (start < end)
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if ((*callback)(start + voff, end + voff, arg) < 0)
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return;
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}
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}
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/*
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* Walk the EFI memory map and call CALLBACK once for each EFI memory
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* descriptor that has memory that is available for OS use.
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*/
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void
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efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
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{
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walk(callback, arg, EFI_MEMORY_WB);
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}
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/*
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* Walk the EFI memory map and call CALLBACK once for each EFI memory
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* descriptor that has memory that is available for uncached allocator.
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*/
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void
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efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg)
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{
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walk(callback, arg, EFI_MEMORY_UC);
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}
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/*
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* Look for the PAL_CODE region reported by EFI and map it using an
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* ITR to enable safe PAL calls in virtual mode. See IA-64 Processor
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* Abstraction Layer chapter 11 in ADAG
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*/
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void *
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efi_get_pal_addr (void)
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{
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void *efi_map_start, *efi_map_end, *p;
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efi_memory_desc_t *md;
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u64 efi_desc_size;
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int pal_code_count = 0;
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u64 vaddr, mask;
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efi_map_start = __va(ia64_boot_param->efi_memmap);
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efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
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efi_desc_size = ia64_boot_param->efi_memdesc_size;
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for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
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md = p;
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if (md->type != EFI_PAL_CODE)
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continue;
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if (++pal_code_count > 1) {
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printk(KERN_ERR "Too many EFI Pal Code memory ranges, "
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"dropped @ %llx\n", md->phys_addr);
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continue;
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}
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/*
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* The only ITLB entry in region 7 that is used is the one
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* installed by __start(). That entry covers a 64MB range.
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*/
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mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
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vaddr = PAGE_OFFSET + md->phys_addr;
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/*
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* We must check that the PAL mapping won't overlap with the
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* kernel mapping.
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*
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* PAL code is guaranteed to be aligned on a power of 2 between
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* 4k and 256KB and that only one ITR is needed to map it. This
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* implies that the PAL code is always aligned on its size,
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* i.e., the closest matching page size supported by the TLB.
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* Therefore PAL code is guaranteed never to cross a 64MB unless
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* it is bigger than 64MB (very unlikely!). So for now the
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* following test is enough to determine whether or not we need
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* a dedicated ITR for the PAL code.
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*/
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if ((vaddr & mask) == (KERNEL_START & mask)) {
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printk(KERN_INFO "%s: no need to install ITR for PAL code\n",
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__func__);
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continue;
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}
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if (efi_md_size(md) > IA64_GRANULE_SIZE)
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panic("Whoa! PAL code size bigger than a granule!");
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#if EFI_DEBUG
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mask = ~((1 << IA64_GRANULE_SHIFT) - 1);
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printk(KERN_INFO "CPU %d: mapping PAL code "
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"[0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
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smp_processor_id(), md->phys_addr,
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md->phys_addr + efi_md_size(md),
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vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
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#endif
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return __va(md->phys_addr);
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}
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printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n",
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__func__);
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return NULL;
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}
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static u8 __init palo_checksum(u8 *buffer, u32 length)
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{
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u8 sum = 0;
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u8 *end = buffer + length;
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while (buffer < end)
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sum = (u8) (sum + *(buffer++));
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return sum;
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}
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/*
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* Parse and handle PALO table which is published at:
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* http://www.dig64.org/home/DIG64_PALO_R1_0.pdf
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*/
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static void __init handle_palo(unsigned long phys_addr)
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{
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struct palo_table *palo = __va(phys_addr);
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u8 checksum;
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if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) {
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printk(KERN_INFO "PALO signature incorrect.\n");
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return;
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}
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checksum = palo_checksum((u8 *)palo, palo->length);
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if (checksum) {
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printk(KERN_INFO "PALO checksum incorrect.\n");
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return;
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}
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setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO);
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}
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void
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efi_map_pal_code (void)
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{
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void *pal_vaddr = efi_get_pal_addr ();
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u64 psr;
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if (!pal_vaddr)
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return;
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/*
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* Cannot write to CRx with PSR.ic=1
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*/
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psr = ia64_clear_ic();
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ia64_itr(0x1, IA64_TR_PALCODE,
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GRANULEROUNDDOWN((unsigned long) pal_vaddr),
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pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)),
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IA64_GRANULE_SHIFT);
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paravirt_dv_serialize_data();
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ia64_set_psr(psr); /* restore psr */
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}
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void __init
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efi_init (void)
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{
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void *efi_map_start, *efi_map_end;
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efi_char16_t *c16;
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u64 efi_desc_size;
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char *cp, vendor[100] = "unknown";
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int i;
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|
|
|
set_bit(EFI_BOOT, &efi.flags);
|
|
set_bit(EFI_64BIT, &efi.flags);
|
|
|
|
/*
|
|
* It's too early to be able to use the standard kernel command line
|
|
* support...
|
|
*/
|
|
for (cp = boot_command_line; *cp; ) {
|
|
if (memcmp(cp, "mem=", 4) == 0) {
|
|
mem_limit = memparse(cp + 4, &cp);
|
|
} else if (memcmp(cp, "max_addr=", 9) == 0) {
|
|
max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
|
|
} else if (memcmp(cp, "min_addr=", 9) == 0) {
|
|
min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
|
|
} else {
|
|
while (*cp != ' ' && *cp)
|
|
++cp;
|
|
while (*cp == ' ')
|
|
++cp;
|
|
}
|
|
}
|
|
if (min_addr != 0UL)
|
|
printk(KERN_INFO "Ignoring memory below %lluMB\n",
|
|
min_addr >> 20);
|
|
if (max_addr != ~0UL)
|
|
printk(KERN_INFO "Ignoring memory above %lluMB\n",
|
|
max_addr >> 20);
|
|
|
|
efi.systab = __va(ia64_boot_param->efi_systab);
|
|
|
|
/*
|
|
* Verify the EFI Table
|
|
*/
|
|
if (efi.systab == NULL)
|
|
panic("Whoa! Can't find EFI system table.\n");
|
|
if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
|
|
panic("Whoa! EFI system table signature incorrect\n");
|
|
if ((efi.systab->hdr.revision >> 16) == 0)
|
|
printk(KERN_WARNING "Warning: EFI system table version "
|
|
"%d.%02d, expected 1.00 or greater\n",
|
|
efi.systab->hdr.revision >> 16,
|
|
efi.systab->hdr.revision & 0xffff);
|
|
|
|
/* Show what we know for posterity */
|
|
c16 = __va(efi.systab->fw_vendor);
|
|
if (c16) {
|
|
for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i)
|
|
vendor[i] = *c16++;
|
|
vendor[i] = '\0';
|
|
}
|
|
|
|
printk(KERN_INFO "EFI v%u.%.02u by %s:",
|
|
efi.systab->hdr.revision >> 16,
|
|
efi.systab->hdr.revision & 0xffff, vendor);
|
|
|
|
set_bit(EFI_SYSTEM_TABLES, &efi.flags);
|
|
|
|
palo_phys = EFI_INVALID_TABLE_ADDR;
|
|
|
|
if (efi_config_init(arch_tables) != 0)
|
|
return;
|
|
|
|
if (palo_phys != EFI_INVALID_TABLE_ADDR)
|
|
handle_palo(palo_phys);
|
|
|
|
runtime = __va(efi.systab->runtime);
|
|
efi.get_time = phys_get_time;
|
|
efi.set_time = phys_set_time;
|
|
efi.get_wakeup_time = phys_get_wakeup_time;
|
|
efi.set_wakeup_time = phys_set_wakeup_time;
|
|
efi.get_variable = phys_get_variable;
|
|
efi.get_next_variable = phys_get_next_variable;
|
|
efi.set_variable = phys_set_variable;
|
|
efi.get_next_high_mono_count = phys_get_next_high_mono_count;
|
|
efi.reset_system = phys_reset_system;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
#if EFI_DEBUG
|
|
/* print EFI memory map: */
|
|
{
|
|
efi_memory_desc_t *md;
|
|
void *p;
|
|
|
|
for (i = 0, p = efi_map_start; p < efi_map_end;
|
|
++i, p += efi_desc_size)
|
|
{
|
|
const char *unit;
|
|
unsigned long size;
|
|
|
|
md = p;
|
|
size = md->num_pages << EFI_PAGE_SHIFT;
|
|
|
|
if ((size >> 40) > 0) {
|
|
size >>= 40;
|
|
unit = "TB";
|
|
} else if ((size >> 30) > 0) {
|
|
size >>= 30;
|
|
unit = "GB";
|
|
} else if ((size >> 20) > 0) {
|
|
size >>= 20;
|
|
unit = "MB";
|
|
} else {
|
|
size >>= 10;
|
|
unit = "KB";
|
|
}
|
|
|
|
printk("mem%02d: type=%2u, attr=0x%016lx, "
|
|
"range=[0x%016lx-0x%016lx) (%4lu%s)\n",
|
|
i, md->type, md->attribute, md->phys_addr,
|
|
md->phys_addr + efi_md_size(md), size, unit);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
efi_map_pal_code();
|
|
efi_enter_virtual_mode();
|
|
}
|
|
|
|
void
|
|
efi_enter_virtual_mode (void)
|
|
{
|
|
void *efi_map_start, *efi_map_end, *p;
|
|
efi_memory_desc_t *md;
|
|
efi_status_t status;
|
|
u64 efi_desc_size;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
|
md = p;
|
|
if (md->attribute & EFI_MEMORY_RUNTIME) {
|
|
/*
|
|
* Some descriptors have multiple bits set, so the
|
|
* order of the tests is relevant.
|
|
*/
|
|
if (md->attribute & EFI_MEMORY_WB) {
|
|
md->virt_addr = (u64) __va(md->phys_addr);
|
|
} else if (md->attribute & EFI_MEMORY_UC) {
|
|
md->virt_addr = (u64) ioremap(md->phys_addr, 0);
|
|
} else if (md->attribute & EFI_MEMORY_WC) {
|
|
#if 0
|
|
md->virt_addr = ia64_remap(md->phys_addr,
|
|
(_PAGE_A |
|
|
_PAGE_P |
|
|
_PAGE_D |
|
|
_PAGE_MA_WC |
|
|
_PAGE_PL_0 |
|
|
_PAGE_AR_RW));
|
|
#else
|
|
printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
|
|
md->virt_addr = (u64) ioremap(md->phys_addr, 0);
|
|
#endif
|
|
} else if (md->attribute & EFI_MEMORY_WT) {
|
|
#if 0
|
|
md->virt_addr = ia64_remap(md->phys_addr,
|
|
(_PAGE_A |
|
|
_PAGE_P |
|
|
_PAGE_D |
|
|
_PAGE_MA_WT |
|
|
_PAGE_PL_0 |
|
|
_PAGE_AR_RW));
|
|
#else
|
|
printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
|
|
md->virt_addr = (u64) ioremap(md->phys_addr, 0);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
status = efi_call_phys(__va(runtime->set_virtual_address_map),
|
|
ia64_boot_param->efi_memmap_size,
|
|
efi_desc_size,
|
|
ia64_boot_param->efi_memdesc_version,
|
|
ia64_boot_param->efi_memmap);
|
|
if (status != EFI_SUCCESS) {
|
|
printk(KERN_WARNING "warning: unable to switch EFI into "
|
|
"virtual mode (status=%lu)\n", status);
|
|
return;
|
|
}
|
|
|
|
set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
|
|
|
|
/*
|
|
* Now that EFI is in virtual mode, we call the EFI functions more
|
|
* efficiently:
|
|
*/
|
|
efi.get_time = virt_get_time;
|
|
efi.set_time = virt_set_time;
|
|
efi.get_wakeup_time = virt_get_wakeup_time;
|
|
efi.set_wakeup_time = virt_set_wakeup_time;
|
|
efi.get_variable = virt_get_variable;
|
|
efi.get_next_variable = virt_get_next_variable;
|
|
efi.set_variable = virt_set_variable;
|
|
efi.get_next_high_mono_count = virt_get_next_high_mono_count;
|
|
efi.reset_system = virt_reset_system;
|
|
}
|
|
|
|
/*
|
|
* Walk the EFI memory map looking for the I/O port range. There can only be
|
|
* one entry of this type, other I/O port ranges should be described via ACPI.
|
|
*/
|
|
u64
|
|
efi_get_iobase (void)
|
|
{
|
|
void *efi_map_start, *efi_map_end, *p;
|
|
efi_memory_desc_t *md;
|
|
u64 efi_desc_size;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
|
md = p;
|
|
if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
|
|
if (md->attribute & EFI_MEMORY_UC)
|
|
return md->phys_addr;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct kern_memdesc *
|
|
kern_memory_descriptor (unsigned long phys_addr)
|
|
{
|
|
struct kern_memdesc *md;
|
|
|
|
for (md = kern_memmap; md->start != ~0UL; md++) {
|
|
if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT))
|
|
return md;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static efi_memory_desc_t *
|
|
efi_memory_descriptor (unsigned long phys_addr)
|
|
{
|
|
void *efi_map_start, *efi_map_end, *p;
|
|
efi_memory_desc_t *md;
|
|
u64 efi_desc_size;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
|
md = p;
|
|
|
|
if (phys_addr - md->phys_addr < efi_md_size(md))
|
|
return md;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
efi_memmap_intersects (unsigned long phys_addr, unsigned long size)
|
|
{
|
|
void *efi_map_start, *efi_map_end, *p;
|
|
efi_memory_desc_t *md;
|
|
u64 efi_desc_size;
|
|
unsigned long end;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
end = phys_addr + size;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
|
md = p;
|
|
if (md->phys_addr < end && efi_md_end(md) > phys_addr)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
u32
|
|
efi_mem_type (unsigned long phys_addr)
|
|
{
|
|
efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
|
|
|
|
if (md)
|
|
return md->type;
|
|
return 0;
|
|
}
|
|
|
|
u64
|
|
efi_mem_attributes (unsigned long phys_addr)
|
|
{
|
|
efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
|
|
|
|
if (md)
|
|
return md->attribute;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(efi_mem_attributes);
|
|
|
|
u64
|
|
efi_mem_attribute (unsigned long phys_addr, unsigned long size)
|
|
{
|
|
unsigned long end = phys_addr + size;
|
|
efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
|
|
u64 attr;
|
|
|
|
if (!md)
|
|
return 0;
|
|
|
|
/*
|
|
* EFI_MEMORY_RUNTIME is not a memory attribute; it just tells
|
|
* the kernel that firmware needs this region mapped.
|
|
*/
|
|
attr = md->attribute & ~EFI_MEMORY_RUNTIME;
|
|
do {
|
|
unsigned long md_end = efi_md_end(md);
|
|
|
|
if (end <= md_end)
|
|
return attr;
|
|
|
|
md = efi_memory_descriptor(md_end);
|
|
if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr)
|
|
return 0;
|
|
} while (md);
|
|
return 0; /* never reached */
|
|
}
|
|
|
|
u64
|
|
kern_mem_attribute (unsigned long phys_addr, unsigned long size)
|
|
{
|
|
unsigned long end = phys_addr + size;
|
|
struct kern_memdesc *md;
|
|
u64 attr;
|
|
|
|
/*
|
|
* This is a hack for ioremap calls before we set up kern_memmap.
|
|
* Maybe we should do efi_memmap_init() earlier instead.
|
|
*/
|
|
if (!kern_memmap) {
|
|
attr = efi_mem_attribute(phys_addr, size);
|
|
if (attr & EFI_MEMORY_WB)
|
|
return EFI_MEMORY_WB;
|
|
return 0;
|
|
}
|
|
|
|
md = kern_memory_descriptor(phys_addr);
|
|
if (!md)
|
|
return 0;
|
|
|
|
attr = md->attribute;
|
|
do {
|
|
unsigned long md_end = kmd_end(md);
|
|
|
|
if (end <= md_end)
|
|
return attr;
|
|
|
|
md = kern_memory_descriptor(md_end);
|
|
if (!md || md->attribute != attr)
|
|
return 0;
|
|
} while (md);
|
|
return 0; /* never reached */
|
|
}
|
|
EXPORT_SYMBOL(kern_mem_attribute);
|
|
|
|
int
|
|
valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size)
|
|
{
|
|
u64 attr;
|
|
|
|
/*
|
|
* /dev/mem reads and writes use copy_to_user(), which implicitly
|
|
* uses a granule-sized kernel identity mapping. It's really
|
|
* only safe to do this for regions in kern_memmap. For more
|
|
* details, see Documentation/ia64/aliasing.txt.
|
|
*/
|
|
attr = kern_mem_attribute(phys_addr, size);
|
|
if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size)
|
|
{
|
|
unsigned long phys_addr = pfn << PAGE_SHIFT;
|
|
u64 attr;
|
|
|
|
attr = efi_mem_attribute(phys_addr, size);
|
|
|
|
/*
|
|
* /dev/mem mmap uses normal user pages, so we don't need the entire
|
|
* granule, but the entire region we're mapping must support the same
|
|
* attribute.
|
|
*/
|
|
if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
|
|
return 1;
|
|
|
|
/*
|
|
* Intel firmware doesn't tell us about all the MMIO regions, so
|
|
* in general we have to allow mmap requests. But if EFI *does*
|
|
* tell us about anything inside this region, we should deny it.
|
|
* The user can always map a smaller region to avoid the overlap.
|
|
*/
|
|
if (efi_memmap_intersects(phys_addr, size))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
pgprot_t
|
|
phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size,
|
|
pgprot_t vma_prot)
|
|
{
|
|
unsigned long phys_addr = pfn << PAGE_SHIFT;
|
|
u64 attr;
|
|
|
|
/*
|
|
* For /dev/mem mmap, we use user mappings, but if the region is
|
|
* in kern_memmap (and hence may be covered by a kernel mapping),
|
|
* we must use the same attribute as the kernel mapping.
|
|
*/
|
|
attr = kern_mem_attribute(phys_addr, size);
|
|
if (attr & EFI_MEMORY_WB)
|
|
return pgprot_cacheable(vma_prot);
|
|
else if (attr & EFI_MEMORY_UC)
|
|
return pgprot_noncached(vma_prot);
|
|
|
|
/*
|
|
* Some chipsets don't support UC access to memory. If
|
|
* WB is supported, we prefer that.
|
|
*/
|
|
if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB)
|
|
return pgprot_cacheable(vma_prot);
|
|
|
|
return pgprot_noncached(vma_prot);
|
|
}
|
|
|
|
int __init
|
|
efi_uart_console_only(void)
|
|
{
|
|
efi_status_t status;
|
|
char *s, name[] = "ConOut";
|
|
efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID;
|
|
efi_char16_t *utf16, name_utf16[32];
|
|
unsigned char data[1024];
|
|
unsigned long size = sizeof(data);
|
|
struct efi_generic_dev_path *hdr, *end_addr;
|
|
int uart = 0;
|
|
|
|
/* Convert to UTF-16 */
|
|
utf16 = name_utf16;
|
|
s = name;
|
|
while (*s)
|
|
*utf16++ = *s++ & 0x7f;
|
|
*utf16 = 0;
|
|
|
|
status = efi.get_variable(name_utf16, &guid, NULL, &size, data);
|
|
if (status != EFI_SUCCESS) {
|
|
printk(KERN_ERR "No EFI %s variable?\n", name);
|
|
return 0;
|
|
}
|
|
|
|
hdr = (struct efi_generic_dev_path *) data;
|
|
end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size);
|
|
while (hdr < end_addr) {
|
|
if (hdr->type == EFI_DEV_MSG &&
|
|
hdr->sub_type == EFI_DEV_MSG_UART)
|
|
uart = 1;
|
|
else if (hdr->type == EFI_DEV_END_PATH ||
|
|
hdr->type == EFI_DEV_END_PATH2) {
|
|
if (!uart)
|
|
return 0;
|
|
if (hdr->sub_type == EFI_DEV_END_ENTIRE)
|
|
return 1;
|
|
uart = 0;
|
|
}
|
|
hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length);
|
|
}
|
|
printk(KERN_ERR "Malformed %s value\n", name);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Look for the first granule aligned memory descriptor memory
|
|
* that is big enough to hold EFI memory map. Make sure this
|
|
* descriptor is atleast granule sized so it does not get trimmed
|
|
*/
|
|
struct kern_memdesc *
|
|
find_memmap_space (void)
|
|
{
|
|
u64 contig_low=0, contig_high=0;
|
|
u64 as = 0, ae;
|
|
void *efi_map_start, *efi_map_end, *p, *q;
|
|
efi_memory_desc_t *md, *pmd = NULL, *check_md;
|
|
u64 space_needed, efi_desc_size;
|
|
unsigned long total_mem = 0;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
/*
|
|
* Worst case: we need 3 kernel descriptors for each efi descriptor
|
|
* (if every entry has a WB part in the middle, and UC head and tail),
|
|
* plus one for the end marker.
|
|
*/
|
|
space_needed = sizeof(kern_memdesc_t) *
|
|
(3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1);
|
|
|
|
for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
|
|
md = p;
|
|
if (!efi_wb(md)) {
|
|
continue;
|
|
}
|
|
if (pmd == NULL || !efi_wb(pmd) ||
|
|
efi_md_end(pmd) != md->phys_addr) {
|
|
contig_low = GRANULEROUNDUP(md->phys_addr);
|
|
contig_high = efi_md_end(md);
|
|
for (q = p + efi_desc_size; q < efi_map_end;
|
|
q += efi_desc_size) {
|
|
check_md = q;
|
|
if (!efi_wb(check_md))
|
|
break;
|
|
if (contig_high != check_md->phys_addr)
|
|
break;
|
|
contig_high = efi_md_end(check_md);
|
|
}
|
|
contig_high = GRANULEROUNDDOWN(contig_high);
|
|
}
|
|
if (!is_memory_available(md) || md->type == EFI_LOADER_DATA)
|
|
continue;
|
|
|
|
/* Round ends inward to granule boundaries */
|
|
as = max(contig_low, md->phys_addr);
|
|
ae = min(contig_high, efi_md_end(md));
|
|
|
|
/* keep within max_addr= and min_addr= command line arg */
|
|
as = max(as, min_addr);
|
|
ae = min(ae, max_addr);
|
|
if (ae <= as)
|
|
continue;
|
|
|
|
/* avoid going over mem= command line arg */
|
|
if (total_mem + (ae - as) > mem_limit)
|
|
ae -= total_mem + (ae - as) - mem_limit;
|
|
|
|
if (ae <= as)
|
|
continue;
|
|
|
|
if (ae - as > space_needed)
|
|
break;
|
|
}
|
|
if (p >= efi_map_end)
|
|
panic("Can't allocate space for kernel memory descriptors");
|
|
|
|
return __va(as);
|
|
}
|
|
|
|
/*
|
|
* Walk the EFI memory map and gather all memory available for kernel
|
|
* to use. We can allocate partial granules only if the unavailable
|
|
* parts exist, and are WB.
|
|
*/
|
|
unsigned long
|
|
efi_memmap_init(u64 *s, u64 *e)
|
|
{
|
|
struct kern_memdesc *k, *prev = NULL;
|
|
u64 contig_low=0, contig_high=0;
|
|
u64 as, ae, lim;
|
|
void *efi_map_start, *efi_map_end, *p, *q;
|
|
efi_memory_desc_t *md, *pmd = NULL, *check_md;
|
|
u64 efi_desc_size;
|
|
unsigned long total_mem = 0;
|
|
|
|
k = kern_memmap = find_memmap_space();
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
|
|
md = p;
|
|
if (!efi_wb(md)) {
|
|
if (efi_uc(md) &&
|
|
(md->type == EFI_CONVENTIONAL_MEMORY ||
|
|
md->type == EFI_BOOT_SERVICES_DATA)) {
|
|
k->attribute = EFI_MEMORY_UC;
|
|
k->start = md->phys_addr;
|
|
k->num_pages = md->num_pages;
|
|
k++;
|
|
}
|
|
continue;
|
|
}
|
|
if (pmd == NULL || !efi_wb(pmd) ||
|
|
efi_md_end(pmd) != md->phys_addr) {
|
|
contig_low = GRANULEROUNDUP(md->phys_addr);
|
|
contig_high = efi_md_end(md);
|
|
for (q = p + efi_desc_size; q < efi_map_end;
|
|
q += efi_desc_size) {
|
|
check_md = q;
|
|
if (!efi_wb(check_md))
|
|
break;
|
|
if (contig_high != check_md->phys_addr)
|
|
break;
|
|
contig_high = efi_md_end(check_md);
|
|
}
|
|
contig_high = GRANULEROUNDDOWN(contig_high);
|
|
}
|
|
if (!is_memory_available(md))
|
|
continue;
|
|
|
|
/*
|
|
* Round ends inward to granule boundaries
|
|
* Give trimmings to uncached allocator
|
|
*/
|
|
if (md->phys_addr < contig_low) {
|
|
lim = min(efi_md_end(md), contig_low);
|
|
if (efi_uc(md)) {
|
|
if (k > kern_memmap &&
|
|
(k-1)->attribute == EFI_MEMORY_UC &&
|
|
kmd_end(k-1) == md->phys_addr) {
|
|
(k-1)->num_pages +=
|
|
(lim - md->phys_addr)
|
|
>> EFI_PAGE_SHIFT;
|
|
} else {
|
|
k->attribute = EFI_MEMORY_UC;
|
|
k->start = md->phys_addr;
|
|
k->num_pages = (lim - md->phys_addr)
|
|
>> EFI_PAGE_SHIFT;
|
|
k++;
|
|
}
|
|
}
|
|
as = contig_low;
|
|
} else
|
|
as = md->phys_addr;
|
|
|
|
if (efi_md_end(md) > contig_high) {
|
|
lim = max(md->phys_addr, contig_high);
|
|
if (efi_uc(md)) {
|
|
if (lim == md->phys_addr && k > kern_memmap &&
|
|
(k-1)->attribute == EFI_MEMORY_UC &&
|
|
kmd_end(k-1) == md->phys_addr) {
|
|
(k-1)->num_pages += md->num_pages;
|
|
} else {
|
|
k->attribute = EFI_MEMORY_UC;
|
|
k->start = lim;
|
|
k->num_pages = (efi_md_end(md) - lim)
|
|
>> EFI_PAGE_SHIFT;
|
|
k++;
|
|
}
|
|
}
|
|
ae = contig_high;
|
|
} else
|
|
ae = efi_md_end(md);
|
|
|
|
/* keep within max_addr= and min_addr= command line arg */
|
|
as = max(as, min_addr);
|
|
ae = min(ae, max_addr);
|
|
if (ae <= as)
|
|
continue;
|
|
|
|
/* avoid going over mem= command line arg */
|
|
if (total_mem + (ae - as) > mem_limit)
|
|
ae -= total_mem + (ae - as) - mem_limit;
|
|
|
|
if (ae <= as)
|
|
continue;
|
|
if (prev && kmd_end(prev) == md->phys_addr) {
|
|
prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT;
|
|
total_mem += ae - as;
|
|
continue;
|
|
}
|
|
k->attribute = EFI_MEMORY_WB;
|
|
k->start = as;
|
|
k->num_pages = (ae - as) >> EFI_PAGE_SHIFT;
|
|
total_mem += ae - as;
|
|
prev = k++;
|
|
}
|
|
k->start = ~0L; /* end-marker */
|
|
|
|
/* reserve the memory we are using for kern_memmap */
|
|
*s = (u64)kern_memmap;
|
|
*e = (u64)++k;
|
|
|
|
return total_mem;
|
|
}
|
|
|
|
void
|
|
efi_initialize_iomem_resources(struct resource *code_resource,
|
|
struct resource *data_resource,
|
|
struct resource *bss_resource)
|
|
{
|
|
struct resource *res;
|
|
void *efi_map_start, *efi_map_end, *p;
|
|
efi_memory_desc_t *md;
|
|
u64 efi_desc_size;
|
|
char *name;
|
|
unsigned long flags;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
res = NULL;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
|
md = p;
|
|
|
|
if (md->num_pages == 0) /* should not happen */
|
|
continue;
|
|
|
|
flags = IORESOURCE_MEM | IORESOURCE_BUSY;
|
|
switch (md->type) {
|
|
|
|
case EFI_MEMORY_MAPPED_IO:
|
|
case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
|
|
continue;
|
|
|
|
case EFI_LOADER_CODE:
|
|
case EFI_LOADER_DATA:
|
|
case EFI_BOOT_SERVICES_DATA:
|
|
case EFI_BOOT_SERVICES_CODE:
|
|
case EFI_CONVENTIONAL_MEMORY:
|
|
if (md->attribute & EFI_MEMORY_WP) {
|
|
name = "System ROM";
|
|
flags |= IORESOURCE_READONLY;
|
|
} else if (md->attribute == EFI_MEMORY_UC)
|
|
name = "Uncached RAM";
|
|
else
|
|
name = "System RAM";
|
|
break;
|
|
|
|
case EFI_ACPI_MEMORY_NVS:
|
|
name = "ACPI Non-volatile Storage";
|
|
break;
|
|
|
|
case EFI_UNUSABLE_MEMORY:
|
|
name = "reserved";
|
|
flags |= IORESOURCE_DISABLED;
|
|
break;
|
|
|
|
case EFI_RESERVED_TYPE:
|
|
case EFI_RUNTIME_SERVICES_CODE:
|
|
case EFI_RUNTIME_SERVICES_DATA:
|
|
case EFI_ACPI_RECLAIM_MEMORY:
|
|
default:
|
|
name = "reserved";
|
|
break;
|
|
}
|
|
|
|
if ((res = kzalloc(sizeof(struct resource),
|
|
GFP_KERNEL)) == NULL) {
|
|
printk(KERN_ERR
|
|
"failed to allocate resource for iomem\n");
|
|
return;
|
|
}
|
|
|
|
res->name = name;
|
|
res->start = md->phys_addr;
|
|
res->end = md->phys_addr + efi_md_size(md) - 1;
|
|
res->flags = flags;
|
|
|
|
if (insert_resource(&iomem_resource, res) < 0)
|
|
kfree(res);
|
|
else {
|
|
/*
|
|
* We don't know which region contains
|
|
* kernel data so we try it repeatedly and
|
|
* let the resource manager test it.
|
|
*/
|
|
insert_resource(res, code_resource);
|
|
insert_resource(res, data_resource);
|
|
insert_resource(res, bss_resource);
|
|
#ifdef CONFIG_KEXEC
|
|
insert_resource(res, &efi_memmap_res);
|
|
insert_resource(res, &boot_param_res);
|
|
if (crashk_res.end > crashk_res.start)
|
|
insert_resource(res, &crashk_res);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
/* find a block of memory aligned to 64M exclude reserved regions
|
|
rsvd_regions are sorted
|
|
*/
|
|
unsigned long __init
|
|
kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n)
|
|
{
|
|
int i;
|
|
u64 start, end;
|
|
u64 alignment = 1UL << _PAGE_SIZE_64M;
|
|
void *efi_map_start, *efi_map_end, *p;
|
|
efi_memory_desc_t *md;
|
|
u64 efi_desc_size;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
|
md = p;
|
|
if (!efi_wb(md))
|
|
continue;
|
|
start = ALIGN(md->phys_addr, alignment);
|
|
end = efi_md_end(md);
|
|
for (i = 0; i < n; i++) {
|
|
if (__pa(r[i].start) >= start && __pa(r[i].end) < end) {
|
|
if (__pa(r[i].start) > start + size)
|
|
return start;
|
|
start = ALIGN(__pa(r[i].end), alignment);
|
|
if (i < n-1 &&
|
|
__pa(r[i+1].start) < start + size)
|
|
continue;
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
if (end > start + size)
|
|
return start;
|
|
}
|
|
|
|
printk(KERN_WARNING
|
|
"Cannot reserve 0x%lx byte of memory for crashdump\n", size);
|
|
return ~0UL;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
/* locate the size find a the descriptor at a certain address */
|
|
unsigned long __init
|
|
vmcore_find_descriptor_size (unsigned long address)
|
|
{
|
|
void *efi_map_start, *efi_map_end, *p;
|
|
efi_memory_desc_t *md;
|
|
u64 efi_desc_size;
|
|
unsigned long ret = 0;
|
|
|
|
efi_map_start = __va(ia64_boot_param->efi_memmap);
|
|
efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
|
|
efi_desc_size = ia64_boot_param->efi_memdesc_size;
|
|
|
|
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
|
|
md = p;
|
|
if (efi_wb(md) && md->type == EFI_LOADER_DATA
|
|
&& md->phys_addr == address) {
|
|
ret = efi_md_size(md);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ret == 0)
|
|
printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n");
|
|
|
|
return ret;
|
|
}
|
|
#endif
|