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Subject[PATCH 4/14] Generic ioremap_page_range: arm conversion
Date
From: Russell King <rmk@arm.linux.org.uk>

Convert ARM to use generic ioremap_page_range()

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
---
arch/arm/mm/ioremap.c | 95 +++----------------------------------------------
1 files changed, 5 insertions(+), 90 deletions(-)
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 88a999d..942a1ee 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -22,11 +22,11 @@
*/
#include <linux/module.h>
#include <linux/errno.h>
+#include <linux/io.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>

#include <asm/cacheflush.h>
-#include <asm/io.h>
#include <asm/mmu_context.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
@@ -38,94 +38,6 @@ #include <asm/sizes.h>
*/
#define VM_ARM_SECTION_MAPPING 0x80000000

-static inline void
-remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
- unsigned long phys_addr, pgprot_t pgprot)
-{
- unsigned long end;
-
- address &= ~PMD_MASK;
- end = address + size;
- if (end > PMD_SIZE)
- end = PMD_SIZE;
- BUG_ON(address >= end);
- do {
- if (!pte_none(*pte))
- goto bad;
-
- set_pte(pte, pfn_pte(phys_addr >> PAGE_SHIFT, pgprot));
- address += PAGE_SIZE;
- phys_addr += PAGE_SIZE;
- pte++;
- } while (address && (address < end));
- return;
-
- bad:
- printk("remap_area_pte: page already exists\n");
- BUG();
-}
-
-static inline int
-remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
- unsigned long phys_addr, unsigned long flags)
-{
- unsigned long end;
- pgprot_t pgprot;
-
- address &= ~PGDIR_MASK;
- end = address + size;
-
- if (end > PGDIR_SIZE)
- end = PGDIR_SIZE;
-
- phys_addr -= address;
- BUG_ON(address >= end);
-
- pgprot = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | L_PTE_WRITE | flags);
- do {
- pte_t * pte = pte_alloc_kernel(pmd, address);
- if (!pte)
- return -ENOMEM;
- remap_area_pte(pte, address, end - address, address + phys_addr, pgprot);
- address = (address + PMD_SIZE) & PMD_MASK;
- pmd++;
- } while (address && (address < end));
- return 0;
-}
-
-static int
-remap_area_pages(unsigned long start, unsigned long pfn,
- unsigned long size, unsigned long flags)
-{
- unsigned long address = start;
- unsigned long end = start + size;
- unsigned long phys_addr = __pfn_to_phys(pfn);
- int err = 0;
- pgd_t * dir;
-
- phys_addr -= address;
- dir = pgd_offset(&init_mm, address);
- BUG_ON(address >= end);
- do {
- pmd_t *pmd = pmd_alloc(&init_mm, dir, address);
- if (!pmd) {
- err = -ENOMEM;
- break;
- }
- if (remap_area_pmd(pmd, address, end - address,
- phys_addr + address, flags)) {
- err = -ENOMEM;
- break;
- }
-
- address = (address + PGDIR_SIZE) & PGDIR_MASK;
- dir++;
- } while (address && (address < end));
-
- return err;
-}
-
-
void __check_kvm_seq(struct mm_struct *mm)
{
unsigned int seq;
@@ -326,7 +238,10 @@ #ifndef CONFIG_SMP
err = remap_area_sections(addr, pfn, size, flags);
} else
#endif
- err = remap_area_pages(addr, pfn, size, flags);
+ err = ioremap_page_range(addr, addr + size, pfn << PAGE_SHIFT,
+ __pgprot(L_PTE_PRESENT | L_PTE_YOUNG
+ | L_PTE_DIRTY | L_PTE_WRITE
+ | flags));

if (err) {
vunmap((void *)addr);
--
1.4.0
-
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