diff options
Diffstat (limited to 'arch/mips/mm/c-r3k.c')
| -rw-r--r-- | arch/mips/mm/c-r3k.c | 60 |
1 files changed, 32 insertions, 28 deletions
diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c index c55312f6fd3..562abb77d1d 100644 --- a/arch/mips/mm/c-r3k.c +++ b/arch/mips/mm/c-r3k.c @@ -7,7 +7,7 @@ * Tx39XX R4k style caches added. HK * Copyright (C) 1998, 1999, 2000 Harald Koerfgen * Copyright (C) 1998 Gleb Raiko & Vladimir Roganov - * Copyright (C) 2001, 2004 Maciej W. Rozycki + * Copyright (C) 2001, 2004, 2007 Maciej W. Rozycki */ #include <linux/init.h> #include <linux/kernel.h> @@ -26,8 +26,6 @@ static unsigned long icache_size, dcache_size; /* Size in bytes */ static unsigned long icache_lsize, dcache_lsize; /* Size in bytes */ -#undef DEBUG_CACHE - unsigned long __init r3k_cache_size(unsigned long ca_flags) { unsigned long flags, status, dummy, size; @@ -217,26 +215,6 @@ static void r3k_flush_dcache_range(unsigned long start, unsigned long end) write_c0_status(flags); } -static inline unsigned long get_phys_page(unsigned long addr, - struct mm_struct *mm) -{ - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - unsigned long physpage; - - pgd = pgd_offset(mm, addr); - pud = pud_offset(pgd, addr); - pmd = pmd_offset(pud, addr); - pte = pte_offset(pmd, addr); - - if ((physpage = pte_val(*pte)) & _PAGE_VALID) - return KSEG0ADDR(physpage & PAGE_MASK); - - return 0; -} - static inline void r3k_flush_cache_all(void) { } @@ -252,12 +230,40 @@ static void r3k_flush_cache_mm(struct mm_struct *mm) } static void r3k_flush_cache_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) + unsigned long start, unsigned long end) { } -static void r3k_flush_cache_page(struct vm_area_struct *vma, unsigned long page, unsigned long pfn) +static void r3k_flush_cache_page(struct vm_area_struct *vma, + unsigned long addr, unsigned long pfn) { + unsigned long kaddr = KSEG0ADDR(pfn << PAGE_SHIFT); + int exec = vma->vm_flags & VM_EXEC; + struct mm_struct *mm = vma->vm_mm; + pgd_t *pgdp; + pud_t *pudp; + pmd_t *pmdp; + pte_t *ptep; + + pr_debug("cpage[%08lx,%08lx]\n", + cpu_context(smp_processor_id(), mm), addr); + + /* No ASID => no such page in the cache. */ + if (cpu_context(smp_processor_id(), mm) == 0) + return; + + pgdp = pgd_offset(mm, addr); + pudp = pud_offset(pgdp, addr); + pmdp = pmd_offset(pudp, addr); + ptep = pte_offset(pmdp, addr); + + /* Invalid => no such page in the cache. */ + if (!(pte_val(*ptep) & _PAGE_PRESENT)) + return; + + r3k_flush_dcache_range(kaddr, kaddr + PAGE_SIZE); + if (exec) + r3k_flush_icache_range(kaddr, kaddr + PAGE_SIZE); } static void local_r3k_flush_data_cache_page(void *addr) @@ -272,9 +278,7 @@ static void r3k_flush_cache_sigtramp(unsigned long addr) { unsigned long flags; -#ifdef DEBUG_CACHE - printk("csigtramp[%08lx]", addr); -#endif + pr_debug("csigtramp[%08lx]\n", addr); flags = read_c0_status(); |