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x86: introduce macro to check whether an address range is in the ISA range

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Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Suresh B Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andreas Herrmann 2008-06-20 21:58:46 +02:00 committed by Ingo Molnar
parent dd0c7c4903
commit bcc643dc28
3 changed files with 4 additions and 4 deletions
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2
arch/x86/mm/ioremap.c
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@ -142,7 +142,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
/*
* Don't remap the low PCI/ISA area, it's always mapped..
*/
if (phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
if (is_ISA_range(phys_addr, last_addr))
return (__force void __iomem *)phys_to_virt(phys_addr);
/*

5
arch/x86/mm/pat.c
View File

@ -215,7 +215,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
}
/* Low ISA region is always mapped WB in page table. No need to track */
if (start >= ISA_START_ADDRESS && (end - 1) <= ISA_END_ADDRESS) {
if (is_ISA_range(start, end - 1)) {
if (ret_type)
*ret_type = _PAGE_CACHE_WB;
@ -415,9 +415,8 @@ int free_memtype(u64 start, u64 end)
}
/* Low ISA region is always mapped WB. No need to track */
if (start >= ISA_START_ADDRESS && end <= ISA_END_ADDRESS) {
if (is_ISA_range(start, end - 1))
return 0;
}
spin_lock(&memtype_lock);
list_for_each_entry(ml, &memtype_list, nd) {

1
include/asm-x86/e820.h
View File

@ -24,6 +24,7 @@ struct e820map {
#define ISA_START_ADDRESS 0xa0000
#define ISA_END_ADDRESS 0x100000
#define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS)
#define BIOS_BEGIN 0x000a0000
#define BIOS_END 0x00100000