diff options
Diffstat (limited to 'arch/sh/mm/tlb-sh4.c')
| -rw-r--r-- | arch/sh/mm/tlb-sh4.c | 55 |
1 files changed, 28 insertions, 27 deletions
diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c index f74cf667c8fa..2d1dd6044307 100644 --- a/arch/sh/mm/tlb-sh4.c +++ b/arch/sh/mm/tlb-sh4.c @@ -4,27 +4,14 @@ * SH-4 specific TLB operations * * Copyright (C) 1999 Niibe Yutaka - * Copyright (C) 2002 Paul Mundt + * Copyright (C) 2002 - 2007 Paul Mundt * * Released under the terms of the GNU GPL v2.0. */ -#include <linux/signal.h> -#include <linux/sched.h> #include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/types.h> -#include <linux/ptrace.h> -#include <linux/mman.h> #include <linux/mm.h> -#include <linux/smp.h> -#include <linux/smp_lock.h> -#include <linux/interrupt.h> - +#include <linux/io.h> #include <asm/system.h> -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/pgalloc.h> #include <asm/mmu_context.h> #include <asm/cacheflush.h> @@ -34,22 +21,27 @@ void update_mmu_cache(struct vm_area_struct * vma, unsigned long flags; unsigned long pteval; unsigned long vpn; - struct page *page; - unsigned long pfn; /* Ptrace may call this routine. */ if (vma && current->active_mm != vma->vm_mm) return; - pfn = pte_pfn(pte); - if (pfn_valid(pfn)) { - page = pfn_to_page(pfn); - if (!test_bit(PG_mapped, &page->flags)) { - unsigned long phys = pte_val(pte) & PTE_PHYS_MASK; - __flush_wback_region((void *)P1SEGADDR(phys), PAGE_SIZE); - __set_bit(PG_mapped, &page->flags); +#ifndef CONFIG_CACHE_OFF + { + unsigned long pfn = pte_pfn(pte); + + if (pfn_valid(pfn)) { + struct page *page = pfn_to_page(pfn); + + if (!test_bit(PG_mapped, &page->flags)) { + unsigned long phys = pte_val(pte) & PTE_PHYS_MASK; + __flush_wback_region((void *)P1SEGADDR(phys), + PAGE_SIZE); + __set_bit(PG_mapped, &page->flags); + } } } +#endif local_irq_save(flags); @@ -57,16 +49,26 @@ void update_mmu_cache(struct vm_area_struct * vma, vpn = (address & MMU_VPN_MASK) | get_asid(); ctrl_outl(vpn, MMU_PTEH); - pteval = pte_val(pte); + pteval = pte.pte_low; /* Set PTEA register */ +#ifdef CONFIG_X2TLB + /* + * For the extended mode TLB this is trivial, only the ESZ and + * EPR bits need to be written out to PTEA, with the remainder of + * the protection bits (with the exception of the compat-mode SZ + * and PR bits, which are cleared) being written out in PTEL. + */ + ctrl_outl(pte.pte_high, MMU_PTEA); +#else if (cpu_data->flags & CPU_HAS_PTEA) /* TODO: make this look less hacky */ ctrl_outl(((pteval >> 28) & 0xe) | (pteval & 0x1), MMU_PTEA); +#endif /* Set PTEL register */ pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */ -#ifdef CONFIG_SH_WRITETHROUGH +#ifdef CONFIG_CACHE_WRITETHROUGH pteval |= _PAGE_WT; #endif /* conveniently, we want all the software flags to be 0 anyway */ @@ -93,4 +95,3 @@ void local_flush_tlb_one(unsigned long asid, unsigned long page) ctrl_outl(data, addr); back_to_P1(); } - |