diff options
| author |   Huang, Ying <ying.huang@intel.com> | 2008-02-25 15:18:37 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:19:54 +0200 |
| commit | 4a3575fd436aa98957184afd745e4ada8f1542d8 (patch) | |
| tree | 786585e3d89af847c126d0b4577e212288a134fe /arch/x86/kernel/efi_64.c | |
| parent | x86: KGDB build fix (diff) | |
| download | linux-dev-4a3575fd436aa98957184afd745e4ada8f1542d8.tar.xz linux-dev-4a3575fd436aa98957184afd745e4ada8f1542d8.zip | |
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 <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/efi_64.c')
| -rw-r--r-- | arch/x86/kernel/efi_64.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c index d143a1e76b30..d0060fdcccac 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; } |