diff options
Diffstat (limited to 'arch/mips/mm/c-sb1.c')
| -rw-r--r-- | arch/mips/mm/c-sb1.c | 105 |
1 files changed, 25 insertions, 80 deletions
diff --git a/arch/mips/mm/c-sb1.c b/arch/mips/mm/c-sb1.c index 2d71efb82ac5..5537558f19f7 100644 --- a/arch/mips/mm/c-sb1.c +++ b/arch/mips/mm/c-sb1.c @@ -155,6 +155,26 @@ static inline void __sb1_flush_icache_all(void) } /* + * Invalidate a range of the icache. The addresses are virtual, and + * the cache is virtually indexed and tagged. However, we don't + * necessarily have the right ASID context, so use index ops instead + * of hit ops. + */ +static inline void __sb1_flush_icache_range(unsigned long start, + unsigned long end) +{ + start &= ~(icache_line_size - 1); + end = (end + icache_line_size - 1) & ~(icache_line_size - 1); + + while (start != end) { + cache_set_op(Index_Invalidate_I, start & icache_index_mask); + start += icache_line_size; + } + mispredict(); + sync(); +} + +/* * Flush the icache for a given physical page. Need to writeback the * dcache first, then invalidate the icache. If the page isn't * executable, nothing is required. @@ -173,8 +193,11 @@ static void local_sb1_flush_cache_page(struct vm_area_struct *vma, unsigned long /* * Bumping the ASID is probably cheaper than the flush ... */ - if (cpu_context(cpu, vma->vm_mm) != 0) - drop_mmu_context(vma->vm_mm, cpu); + if (vma->vm_mm == current->active_mm) { + if (cpu_context(cpu, vma->vm_mm) != 0) + drop_mmu_context(vma->vm_mm, cpu); + } else + __sb1_flush_icache_range(addr, addr + PAGE_SIZE); } #ifdef CONFIG_SMP @@ -210,26 +233,6 @@ void sb1_flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsign __attribute__((alias("local_sb1_flush_cache_page"))); #endif -/* - * Invalidate a range of the icache. The addresses are virtual, and - * the cache is virtually indexed and tagged. However, we don't - * necessarily have the right ASID context, so use index ops instead - * of hit ops. - */ -static inline void __sb1_flush_icache_range(unsigned long start, - unsigned long end) -{ - start &= ~(icache_line_size - 1); - end = (end + icache_line_size - 1) & ~(icache_line_size - 1); - - while (start != end) { - cache_set_op(Index_Invalidate_I, start & icache_index_mask); - start += icache_line_size; - } - mispredict(); - sync(); -} - /* * Invalidate all caches on this CPU @@ -304,63 +307,6 @@ void sb1_flush_icache_range(unsigned long start, unsigned long end) #endif /* - * Flush the icache for a given physical page. Need to writeback the - * dcache first, then invalidate the icache. If the page isn't - * executable, nothing is required. - */ -static void local_sb1_flush_icache_page(struct vm_area_struct *vma, - struct page *page) -{ - unsigned long start; - int cpu = smp_processor_id(); - -#ifndef CONFIG_SMP - if (!(vma->vm_flags & VM_EXEC)) - return; -#endif - - /* Need to writeback any dirty data for that page, we have the PA */ - start = (unsigned long)(page-mem_map) << PAGE_SHIFT; - __sb1_writeback_inv_dcache_phys_range(start, start + PAGE_SIZE); - /* - * If there's a context, bump the ASID (cheaper than a flush, - * since we don't know VAs!) - */ - if (cpu_context(cpu, vma->vm_mm) != 0) { - drop_mmu_context(vma->vm_mm, cpu); - } -} - -#ifdef CONFIG_SMP -struct flush_icache_page_args { - struct vm_area_struct *vma; - struct page *page; -}; - -static void sb1_flush_icache_page_ipi(void *info) -{ - struct flush_icache_page_args *args = info; - local_sb1_flush_icache_page(args->vma, args->page); -} - -/* Dirty dcache could be on another CPU, so do the IPIs */ -static void sb1_flush_icache_page(struct vm_area_struct *vma, - struct page *page) -{ - struct flush_icache_page_args args; - - if (!(vma->vm_flags & VM_EXEC)) - return; - args.vma = vma; - args.page = page; - on_each_cpu(sb1_flush_icache_page_ipi, (void *) &args, 1, 1); -} -#else -void sb1_flush_icache_page(struct vm_area_struct *vma, struct page *page) - __attribute__((alias("local_sb1_flush_icache_page"))); -#endif - -/* * A signal trampoline must fit into a single cacheline. */ static void local_sb1_flush_cache_sigtramp(unsigned long addr) @@ -520,7 +466,6 @@ void sb1_cache_init(void) /* These routines are for Icache coherence with the Dcache */ flush_icache_range = sb1_flush_icache_range; - flush_icache_page = sb1_flush_icache_page; flush_icache_all = __sb1_flush_icache_all; /* local only */ /* This implies an Icache flush too, so can't be nop'ed */ |
