x86: introduce macro to check whether an address range is in the ISA range
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>
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 7452eb3..6d9960d 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -142,7 +142,7 @@
/*
* 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);
/*
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 227df3c..5bbc22e 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -215,7 +215,7 @@
}
/* 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 @@
}
/* 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) {
diff --git a/include/asm-x86/e820.h b/include/asm-x86/e820.h
index 7004251..5103d0b 100644
--- a/include/asm-x86/e820.h
+++ b/include/asm-x86/e820.h
@@ -24,6 +24,7 @@
#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