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author | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2006-12-08 10:38:07 (GMT) |
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committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-08 16:28:52 (GMT) |
commit | 5b3e1a85c2145813898ac50530c70e6d03a6aa19 (patch) | |
tree | 9a5738f026dd86d7a896b4359ea9c6e0e2d38caa /arch/sh/mm | |
parent | a151ca62d7c28d67a8ca0e950452b5208d1d572d (diff) | |
download | linux-fsl-qoriq-5b3e1a85c2145813898ac50530c70e6d03a6aa19.tar.xz |
[PATCH] Generic ioremap_page_range: sh conversion
Convert SH to use generic ioremap_page_range()
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r-- | arch/sh/mm/ioremap.c | 90 |
1 files changed, 4 insertions, 86 deletions
diff --git a/arch/sh/mm/ioremap.c b/arch/sh/mm/ioremap.c index 11d54c1..90b494a 100644 --- a/arch/sh/mm/ioremap.c +++ b/arch/sh/mm/ioremap.c @@ -16,97 +16,13 @@ #include <linux/module.h> #include <linux/mm.h> #include <linux/pci.h> -#include <asm/io.h> +#include <linux/io.h> #include <asm/page.h> #include <asm/pgalloc.h> #include <asm/addrspace.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> -static inline void remap_area_pte(pte_t * pte, unsigned long address, - unsigned long size, unsigned long phys_addr, unsigned long flags) -{ - unsigned long end; - unsigned long pfn; - pgprot_t pgprot = __pgprot(pgprot_val(PAGE_KERNEL_NOCACHE) | flags); - - address &= ~PMD_MASK; - end = address + size; - if (end > PMD_SIZE) - end = PMD_SIZE; - if (address >= end) - BUG(); - pfn = phys_addr >> PAGE_SHIFT; - do { - if (!pte_none(*pte)) { - printk("remap_area_pte: page already exists\n"); - BUG(); - } - set_pte(pte, pfn_pte(pfn, pgprot)); - address += PAGE_SIZE; - pfn++; - pte++; - } while (address && (address < end)); -} - -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; - - address &= ~PGDIR_MASK; - end = address + size; - if (end > PGDIR_SIZE) - end = PGDIR_SIZE; - phys_addr -= address; - if (address >= end) - BUG(); - do { - pte_t * pte = pte_alloc_kernel(pmd, address); - if (!pte) - return -ENOMEM; - remap_area_pte(pte, address, end - address, address + phys_addr, flags); - address = (address + PMD_SIZE) & PMD_MASK; - pmd++; - } while (address && (address < end)); - return 0; -} - -int remap_area_pages(unsigned long address, unsigned long phys_addr, - unsigned long size, unsigned long flags) -{ - int error; - pgd_t * dir; - unsigned long end = address + size; - - phys_addr -= address; - dir = pgd_offset_k(address); - flush_cache_all(); - if (address >= end) - BUG(); - do { - pud_t *pud; - pmd_t *pmd; - - error = -ENOMEM; - - pud = pud_alloc(&init_mm, dir, address); - if (!pud) - break; - pmd = pmd_alloc(&init_mm, pud, address); - if (!pmd) - break; - if (remap_area_pmd(pmd, address, end - address, - phys_addr + address, flags)) - break; - error = 0; - address = (address + PGDIR_SIZE) & PGDIR_MASK; - dir++; - } while (address && (address < end)); - flush_tlb_all(); - return error; -} - /* * Remap an arbitrary physical address space into the kernel virtual * address space. Needed when the kernel wants to access high addresses @@ -121,6 +37,7 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size, { struct vm_struct * area; unsigned long offset, last_addr, addr, orig_addr; + pgprot_t pgprot; /* Don't allow wraparound or zero size */ last_addr = phys_addr + size - 1; @@ -190,8 +107,9 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size, } #endif + pgprot = __pgprot(pgprot_val(PAGE_KERNEL_NOCACHE) | flags); if (likely(size)) - if (remap_area_pages(addr, phys_addr, size, flags)) { + if (ioremap_page_range(addr, addr + size, phys_addr, pgprot)) { vunmap((void *)orig_addr); return NULL; } |