diff options
Diffstat (limited to 'arch/x86/kernel/efi_64.c')
-rw-r--r-- | arch/x86/kernel/efi_64.c | 114 |
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); -} |