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x86, acpi: merge __acpi_map_table 

and let 64-bit to fall back to use fixmap too.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-07-09 20:16:36 -07:00 committed by Ingo Molnar
parent 7b16eb8930
commit f34fa82b19
2 changed files with 11 additions and 17 deletions
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23
arch/x86/kernel/acpi/boot.c
View File

@ -109,21 +109,6 @@ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
*/
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 long phys, unsigned long size)
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 long phys, unsigned long size)
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. */

5
include/asm-x86/fixmap_64.h
View File

@ -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