summaryrefslogtreecommitdiff
path: root/arch/x86/kernel/efi_64.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/efi_64.c')
-rw-r--r--arch/x86/kernel/efi_64.c114
1 files changed, 0 insertions, 114 deletions
diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c
deleted file mode 100644
index ac0621a7ac3..00000000000
--- a/arch/x86/kernel/efi_64.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * x86_64 specific EFI support functions
- * Based on Extensible Firmware Interface Specification version 1.0
- *
- * Copyright (C) 2005-2008 Intel Co.
- * Fenghua Yu <fenghua.yu@intel.com>
- * Bibo Mao <bibo.mao@intel.com>
- * Chandramouli Narayanan <mouli@linux.intel.com>
- * Huang Ying <ying.huang@intel.com>
- *
- * Code to convert EFI to E820 map has been implemented in elilo bootloader
- * based on a EFI patch by Edgar Hucek. Based on the E820 map, the page table
- * is setup appropriately for EFI runtime code.
- * - mouli 06/14/2007.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/types.h>
-#include <linux/spinlock.h>
-#include <linux/bootmem.h>
-#include <linux/ioport.h>
-#include <linux/module.h>
-#include <linux/efi.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-#include <linux/reboot.h>
-
-#include <asm/setup.h>
-#include <asm/page.h>
-#include <asm/e820.h>
-#include <asm/pgtable.h>
-#include <asm/tlbflush.h>
-#include <asm/proto.h>
-#include <asm/efi.h>
-#include <asm/cacheflush.h>
-#include <asm/fixmap.h>
-
-static pgd_t save_pgd __initdata;
-static unsigned long efi_flags __initdata;
-
-static void __init early_mapping_set_exec(unsigned long start,
- unsigned long end,
- int executable)
-{
- unsigned long num_pages;
-
- start &= PMD_MASK;
- end = (end + PMD_SIZE - 1) & PMD_MASK;
- num_pages = (end - start) >> PAGE_SHIFT;
- if (executable)
- set_memory_x((unsigned long)__va(start), num_pages);
- else
- set_memory_nx((unsigned long)__va(start), num_pages);
-}
-
-static void __init early_runtime_code_mapping_set_exec(int executable)
-{
- efi_memory_desc_t *md;
- void *p;
-
- if (!(__supported_pte_mask & _PAGE_NX))
- return;
-
- /* Make EFI runtime service code area executable */
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
- if (md->type == EFI_RUNTIME_SERVICES_CODE) {
- unsigned long end;
- end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
- early_mapping_set_exec(md->phys_addr, end, executable);
- }
- }
-}
-
-void __init efi_call_phys_prelog(void)
-{
- unsigned long vaddress;
-
- early_runtime_code_mapping_set_exec(1);
- local_irq_save(efi_flags);
- vaddress = (unsigned long)__va(0x0UL);
- save_pgd = *pgd_offset_k(0x0UL);
- set_pgd(pgd_offset_k(0x0UL), *pgd_offset_k(vaddress));
- __flush_tlb_all();
-}
-
-void __init efi_call_phys_epilog(void)
-{
- /*
- * After the lock is released, the original page table is restored.
- */
- set_pgd(pgd_offset_k(0x0UL), save_pgd);
- __flush_tlb_all();
- local_irq_restore(efi_flags);
- early_runtime_code_mapping_set_exec(0);
-}
-
-void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
- u32 type)
-{
- unsigned long last_map_pfn;
-
- if (type == EFI_MEMORY_MAPPED_IO)
- return ioremap(phys_addr, size);
-
- last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
- if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size)
- return NULL;
-
- return (void __iomem *)__va(phys_addr);
-}