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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2007-05-05 21:59:27 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-05 21:59:27 +0200
commit3603ab2b62ad8372fc93816b080b370dd55d7cec (patch)
treee9012ae43fe5988c288074ee12fc4a0fc2f6b63a /arch/arm/mm/ioremap.c
parent[ARM] mm 9: add additional device memory types (diff)
downloadlinux-3603ab2b62ad8372fc93816b080b370dd55d7cec.tar.xz
linux-3603ab2b62ad8372fc93816b080b370dd55d7cec.zip
[ARM] mm 10: allow memory type to be specified with ioremap
__ioremap() took a set of page table flags (specifically the cacheable and bufferable bits) to control the mapping type. However, with the advent of ARMv6, this is far too limited. Replace the page table flags with a memory type index, so that the desired attributes can be selected from the mem_type table. Finally, to prevent silent miscompilation due to the differing arguments, rename the __ioremap() and __ioremap_pfn() functions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/ioremap.c')
-rw-r--r--arch/arm/mm/ioremap.c20
1 files changed, 9 insertions, 11 deletions
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 216623eece35..d6167ad4e011 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -262,11 +262,10 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
* mapping. See include/asm-arm/proc-armv/pgtable.h for more information.
*/
void __iomem *
-__ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
- unsigned long flags)
+__arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
+ unsigned int mtype)
{
const struct mem_type *type;
- struct mem_type t;
int err;
unsigned long addr;
struct vm_struct * area;
@@ -277,10 +276,9 @@ __ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
return NULL;
- t = *get_mem_type(MT_DEVICE);
- t.prot_sect |= flags;
- t.prot_pte |= flags;
- type = &t;
+ type = get_mem_type(mtype);
+ if (!type)
+ return NULL;
size = PAGE_ALIGN(size);
@@ -311,10 +309,10 @@ __ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
flush_cache_vmap(addr, addr + size);
return (void __iomem *) (offset + addr);
}
-EXPORT_SYMBOL(__ioremap_pfn);
+EXPORT_SYMBOL(__arm_ioremap_pfn);
void __iomem *
-__ioremap(unsigned long phys_addr, size_t size, unsigned long flags)
+__arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
{
unsigned long last_addr;
unsigned long offset = phys_addr & ~PAGE_MASK;
@@ -332,9 +330,9 @@ __ioremap(unsigned long phys_addr, size_t size, unsigned long flags)
*/
size = PAGE_ALIGN(last_addr + 1) - phys_addr;
- return __ioremap_pfn(pfn, offset, size, flags);
+ return __arm_ioremap_pfn(pfn, offset, size, mtype);
}
-EXPORT_SYMBOL(__ioremap);
+EXPORT_SYMBOL(__arm_ioremap);
void __iounmap(volatile void __iomem *addr)
{