From 4a3575fd436aa98957184afd745e4ada8f1542d8 Mon Sep 17 00:00:00 2001 From: "Huang, Ying" Date: Mon, 25 Feb 2008 15:18:37 +0800 Subject: x86: EFI_PAGE_SHIFT fix Make x86 EFI code works when EFI_PAGE_SHIFT != PAGE_SHIFT. The memrage_efi_to_native() provided in this patch can be used on other EFI platform such as IA64 too. This patch has been tested on Intel x86_64 platform with EFI 64/32 firmware. Signed-off-by: Huang Ying Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/efi_64.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/x86/kernel/efi_64.c') diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c index d143a1e76b3..d0060fdccca 100644 --- a/arch/x86/kernel/efi_64.c +++ b/arch/x86/kernel/efi_64.c @@ -105,14 +105,14 @@ void __init efi_reserve_bootmem(void) void __iomem * __init efi_ioremap(unsigned long phys_addr, unsigned long size) { - static unsigned pages_mapped; + static unsigned pages_mapped __initdata; unsigned i, pages; + unsigned long offset; - /* phys_addr and size must be page aligned */ - if ((phys_addr & ~PAGE_MASK) || (size & ~PAGE_MASK)) - return NULL; + pages = PFN_UP(phys_addr + size) - PFN_DOWN(phys_addr); + offset = phys_addr & ~PAGE_MASK; + phys_addr &= PAGE_MASK; - pages = size >> PAGE_SHIFT; if (pages_mapped + pages > MAX_EFI_IO_PAGES) return NULL; @@ -124,5 +124,5 @@ void __iomem * __init efi_ioremap(unsigned long phys_addr, unsigned long size) } return (void __iomem *)__fix_to_virt(FIX_EFI_IO_MAP_FIRST_PAGE - \ - (pages_mapped - pages)); + (pages_mapped - pages)) + offset; } -- cgit v1.2.3-70-g09d2