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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-07-26 11:29:13 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-07-27 11:43:47 +0200
commitd746196361c9c635128249bb6cf13e709ae6abe1 (patch)
tree112d387c207d06849c7ced234df9d9bcdc9bf7f5 /arch/arm/mm/ioremap.c
parentARM: 6158/2: PL011 baudrate extension for ST-Ericssons derivative (diff)
downloadlinux-d746196361c9c635128249bb6cf13e709ae6abe1.tar.xz
linux-d746196361c9c635128249bb6cf13e709ae6abe1.zip
ARM: use generic ioremap_page_range()
We don't need our own implementation of this, use the generic library implementation instead. 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.c74
1 files changed, 4 insertions, 70 deletions
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 03f11935ed08..ab506272b2d3 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -42,78 +42,11 @@
*/
#define VM_ARM_SECTION_MAPPING 0x80000000
-static int remap_area_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
- unsigned long phys_addr, const struct mem_type *type)
-{
- pgprot_t prot = __pgprot(type->prot_pte);
- pte_t *pte;
-
- pte = pte_alloc_kernel(pmd, addr);
- if (!pte)
- return -ENOMEM;
-
- do {
- if (!pte_none(*pte))
- goto bad;
-
- set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot), 0);
- phys_addr += PAGE_SIZE;
- } while (pte++, addr += PAGE_SIZE, addr != end);
- return 0;
-
- bad:
- printk(KERN_CRIT "remap_area_pte: page already exists\n");
- BUG();
-}
-
-static inline int remap_area_pmd(pgd_t *pgd, unsigned long addr,
- unsigned long end, unsigned long phys_addr,
- const struct mem_type *type)
-{
- unsigned long next;
- pmd_t *pmd;
- int ret = 0;
-
- pmd = pmd_alloc(&init_mm, pgd, addr);
- if (!pmd)
- return -ENOMEM;
-
- do {
- next = pmd_addr_end(addr, end);
- ret = remap_area_pte(pmd, addr, next, phys_addr, type);
- if (ret)
- return ret;
- phys_addr += next - addr;
- } while (pmd++, addr = next, addr != end);
- return ret;
-}
-
-static int remap_area_pages(unsigned long start, unsigned long pfn,
- size_t size, const struct mem_type *type)
-{
- unsigned long addr = start;
- unsigned long next, end = start + size;
- unsigned long phys_addr = __pfn_to_phys(pfn);
- pgd_t *pgd;
- int err = 0;
-
- BUG_ON(addr >= end);
- pgd = pgd_offset_k(addr);
- do {
- next = pgd_addr_end(addr, end);
- err = remap_area_pmd(pgd, addr, next, phys_addr, type);
- if (err)
- break;
- phys_addr += next - addr;
- } while (pgd++, addr = next, addr != end);
-
- return err;
-}
-
int ioremap_page(unsigned long virt, unsigned long phys,
const struct mem_type *mtype)
{
- return remap_area_pages(virt, __phys_to_pfn(phys), PAGE_SIZE, mtype);
+ return ioremap_page_range(virt, virt + PAGE_SIZE, phys,
+ __pgprot(mtype->prot_pte));
}
EXPORT_SYMBOL(ioremap_page);
@@ -300,7 +233,8 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
err = remap_area_sections(addr, pfn, size, type);
} else
#endif
- err = remap_area_pages(addr, pfn, size, type);
+ err = ioremap_page_range(addr, addr + size, __pfn_to_phys(pfn),
+ __pgprot(type->prot_pte));
if (err) {
vunmap((void *)addr);