Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH] x86: merge __acpi_map_table | Date | Wed, 9 Jul 2008 20:16:36 -0700 |
| |
and let 64bit fallback to use fixmap too
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
--- arch/x86/kernel/acpi/boot.c | 23 ++++++----------------- include/asm-x86/fixmap_64.h | 5 +++++ 2 files changed, 11 insertions(+), 17 deletions(-)
Index: linux-2.6/arch/x86/kernel/acpi/boot.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/acpi/boot.c +++ linux-2.6/arch/x86/kernel/acpi/boot.c @@ -109,21 +109,6 @@ static u64 acpi_lapic_addr __initdata = */ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; -#ifdef CONFIG_X86_64 - -/* rely on all ACPI tables being in the direct mapping */ -char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size) -{ - if (!phys_addr || !size) - return NULL; - - if (phys_addr+size <= (max_pfn_mapped << PAGE_SHIFT) + PAGE_SIZE) - return __va(phys_addr); - - return NULL; -} - -#else /* * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, @@ -142,11 +127,15 @@ char *__init __acpi_map_table(unsigned l unsigned long base, offset, mapped_size; int idx; - if (phys + size < 8 * 1024 * 1024) + if (!phys || !size) + return NULL; + + if (phys+size <= (max_pfn_mapped << PAGE_SHIFT)) return __va(phys); offset = phys & (PAGE_SIZE - 1); mapped_size = PAGE_SIZE - offset; + clear_fixmap(FIX_ACPI_END); set_fixmap(FIX_ACPI_END, phys); base = fix_to_virt(FIX_ACPI_END); @@ -158,13 +147,13 @@ char *__init __acpi_map_table(unsigned l if (--idx < FIX_ACPI_BEGIN) return NULL; /* cannot handle this */ phys += PAGE_SIZE; + clear_fixmap(idx); set_fixmap(idx, phys); mapped_size += PAGE_SIZE; } return ((unsigned char *)base + offset); } -#endif #ifdef CONFIG_PCI_MMCONFIG /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */ Index: linux-2.6/include/asm-x86/fixmap_64.h =================================================================== --- linux-2.6.orig/include/asm-x86/fixmap_64.h +++ linux-2.6/include/asm-x86/fixmap_64.h @@ -12,6 +12,7 @@ #define _ASM_FIXMAP_64_H #include <linux/kernel.h> +#include <asm/acpi.h> #include <asm/apicdef.h> #include <asm/page.h> #include <asm/vsyscall.h> @@ -49,6 +50,10 @@ enum fixed_addresses { #ifdef CONFIG_PARAVIRT FIX_PARAVIRT_BOOTMAP, #endif +#ifdef CONFIG_ACPI + FIX_ACPI_BEGIN, + FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1, +#endif #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT FIX_OHCI1394_BASE, #endif
| |