diff options
Diffstat (limited to 'arch/mips/mm')
| -rw-r--r-- | arch/mips/mm/cache.c | 1 | ||||
| -rw-r--r-- | arch/mips/mm/init.c | 17 | ||||
| -rw-r--r-- | arch/mips/mm/ioremap.c | 96 |
3 files changed, 17 insertions, 97 deletions
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c index caf807ded51..1f954a238a6 100644 --- a/arch/mips/mm/cache.c +++ b/arch/mips/mm/cache.c @@ -32,6 +32,7 @@ void (*local_flush_data_cache_page)(void * addr); void (*flush_data_cache_page)(unsigned long addr); void (*flush_icache_all)(void); +EXPORT_SYMBOL_GPL(local_flush_data_cache_page); EXPORT_SYMBOL(flush_data_cache_page); #ifdef CONFIG_DMA_NONCOHERENT diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index 9e29ba9205f..ea2d15370bb 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -316,7 +316,7 @@ static int __init page_is_ram(unsigned long pagenr) void __init paging_init(void) { unsigned long zones_size[MAX_NR_ZONES] = { 0, }; - unsigned long max_dma, high, low; + unsigned long max_dma, low; #ifndef CONFIG_FLATMEM unsigned long zholes_size[MAX_NR_ZONES] = { 0, }; unsigned long i, j, pfn; @@ -331,7 +331,6 @@ void __init paging_init(void) max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; low = max_low_pfn; - high = highend_pfn; #ifdef CONFIG_ISA if (low < max_dma) @@ -344,13 +343,13 @@ void __init paging_init(void) zones_size[ZONE_DMA] = low; #endif #ifdef CONFIG_HIGHMEM - if (cpu_has_dc_aliases) { - printk(KERN_WARNING "This processor doesn't support highmem."); - if (high - low) - printk(" %ldk highmem ignored", high - low); - printk("\n"); - } else - zones_size[ZONE_HIGHMEM] = high - low; + zones_size[ZONE_HIGHMEM] = highend_pfn - highstart_pfn; + + if (cpu_has_dc_aliases && zones_size[ZONE_HIGHMEM]) { + printk(KERN_WARNING "This processor doesn't support highmem." + " %ldk highmem ignored\n", zones_size[ZONE_HIGHMEM]); + zones_size[ZONE_HIGHMEM] = 0; + } #endif #ifdef CONFIG_FLATMEM diff --git a/arch/mips/mm/ioremap.c b/arch/mips/mm/ioremap.c index cea7d0ea36e..fc2c96f0a1f 100644 --- a/arch/mips/mm/ioremap.c +++ b/arch/mips/mm/ioremap.c @@ -6,98 +6,13 @@ * (C) Copyright 1995 1996 Linus Torvalds * (C) Copyright 2001, 2002 Ralf Baechle */ +#include <linux/mm.h> #include <linux/module.h> #include <asm/addrspace.h> #include <asm/byteorder.h> #include <linux/vmalloc.h> -#include <asm/cacheflush.h> -#include <asm/io.h> -#include <asm/tlbflush.h> - -static inline void remap_area_pte(pte_t * pte, unsigned long address, - phys_t size, phys_t phys_addr, unsigned long flags) -{ - phys_t end; - unsigned long pfn; - pgprot_t pgprot = __pgprot(_PAGE_GLOBAL | _PAGE_PRESENT | __READABLE - | __WRITEABLE | 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, - phys_t size, phys_t phys_addr, unsigned long flags) -{ - phys_t 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; -} - -static int remap_area_pages(unsigned long address, phys_t phys_addr, - phys_t size, unsigned long flags) -{ - int error; - pgd_t * dir; - unsigned long end = address + size; - - phys_addr -= address; - dir = pgd_offset(&init_mm, 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; -} +#include <linux/io.h> /* * Generic mapping function (not visible outside): @@ -121,6 +36,7 @@ void __iomem * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags) unsigned long offset; phys_t last_addr; void * addr; + pgprot_t pgprot; phys_addr = fixup_bigphys_addr(phys_addr, size); @@ -152,6 +68,9 @@ void __iomem * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags) return NULL; } + pgprot = __pgprot(_PAGE_GLOBAL | _PAGE_PRESENT | __READABLE + | __WRITEABLE | flags); + /* * Mappings have to be page-aligned */ @@ -166,7 +85,8 @@ void __iomem * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags) if (!area) return NULL; addr = area->addr; - if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) { + if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, + phys_addr, pgprot)) { vunmap(addr); return NULL; } |