diff options
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/cacheflush.h | 2 | ||||
| -rw-r--r-- | arch/arc/mm/cache_arc700.c | 48 | ||||
| -rw-r--r-- | arch/arc/mm/tlb.c | 2 |
3 files changed, 34 insertions, 18 deletions
diff --git a/arch/arc/include/asm/cacheflush.h b/arch/arc/include/asm/cacheflush.h index ee1f6eae82d2..ed820bcb745e 100644 --- a/arch/arc/include/asm/cacheflush.h +++ b/arch/arc/include/asm/cacheflush.h @@ -33,7 +33,7 @@ void flush_cache_all(void); void flush_icache_range(unsigned long start, unsigned long end); void __sync_icache_dcache(unsigned long paddr, unsigned long vaddr, int len); void __inv_icache_page(unsigned long paddr, unsigned long vaddr); -void __flush_dcache_page(unsigned long paddr); +void __flush_dcache_page(unsigned long paddr, unsigned long vaddr); #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 diff --git a/arch/arc/mm/cache_arc700.c b/arch/arc/mm/cache_arc700.c index 8a760e2c0341..a9a37089257a 100644 --- a/arch/arc/mm/cache_arc700.c +++ b/arch/arc/mm/cache_arc700.c @@ -269,9 +269,10 @@ static inline void __dc_entire_op(const int cacheop) * Per Line Operation on D-Cache * Doesn't deal with type-of-op/IRQ-disabling/waiting-for-flush-to-complete * It's sole purpose is to help gcc generate ZOL + * (aliasing VIPT dcache flushing needs both vaddr and paddr) */ -static inline void __dc_line_loop(unsigned long paddr, unsigned long sz, - int aux_reg) +static inline void __dc_line_loop(unsigned long paddr, unsigned long vaddr, + unsigned long sz, const int aux_reg) { int num_lines; @@ -284,31 +285,41 @@ static inline void __dc_line_loop(unsigned long paddr, unsigned long sz, if (!(__builtin_constant_p(sz) && sz == PAGE_SIZE)) { sz += paddr & ~DCACHE_LINE_MASK; paddr &= DCACHE_LINE_MASK; + vaddr &= DCACHE_LINE_MASK; } num_lines = DIV_ROUND_UP(sz, ARC_DCACHE_LINE_LEN); +#if (CONFIG_ARC_MMU_VER <= 2) + paddr |= (vaddr >> PAGE_SHIFT) & 0x1F; +#endif + while (num_lines-- > 0) { #if (CONFIG_ARC_MMU_VER > 2) /* * Just as for I$, in MMU v3, D$ ops also require * "tag" bits in DC_PTAG, "index" bits in FLDL,IVDL ops - * But we pass phy addr for both. This works since Linux - * doesn't support aliasing configs for D$, yet. - * Thus paddr is enough to provide both tag and index. */ write_aux_reg(ARC_REG_DC_PTAG, paddr); -#endif + + write_aux_reg(aux_reg, vaddr); + vaddr += ARC_DCACHE_LINE_LEN; +#else + /* paddr contains stuffed vaddrs bits */ write_aux_reg(aux_reg, paddr); +#endif paddr += ARC_DCACHE_LINE_LEN; } } +/* For kernel mappings cache op index is same as paddr */ +#define __dc_line_op_k(p, sz, op) __dc_line_op(p, p, sz, op) + /* * D-Cache : Per Line INV (discard or wback+discard) or FLUSH (wback) */ -static inline void __dc_line_op(unsigned long paddr, unsigned long sz, - const int cacheop) +static inline void __dc_line_op(unsigned long paddr, unsigned long vaddr, + unsigned long sz, const int cacheop) { unsigned long flags, tmp = tmp; int aux; @@ -331,7 +342,7 @@ static inline void __dc_line_op(unsigned long paddr, unsigned long sz, else aux = ARC_REG_DC_FLDL; - __dc_line_loop(paddr, sz, aux); + __dc_line_loop(paddr, vaddr, sz, aux); if (cacheop & OP_FLUSH) /* flush / flush-n-inv both wait */ wait_for_flush(); @@ -346,7 +357,8 @@ static inline void __dc_line_op(unsigned long paddr, unsigned long sz, #else #define __dc_entire_op(cacheop) -#define __dc_line_op(paddr, sz, cacheop) +#define __dc_line_op(paddr, vaddr, sz, cacheop) +#define __dc_line_op_k(paddr, sz, cacheop) #endif /* CONFIG_ARC_HAS_DCACHE */ @@ -462,19 +474,19 @@ EXPORT_SYMBOL(flush_dcache_page); void dma_cache_wback_inv(unsigned long start, unsigned long sz) { - __dc_line_op(start, sz, OP_FLUSH_N_INV); + __dc_line_op_k(start, sz, OP_FLUSH_N_INV); } EXPORT_SYMBOL(dma_cache_wback_inv); void dma_cache_inv(unsigned long start, unsigned long sz) { - __dc_line_op(start, sz, OP_INV); + __dc_line_op_k(start, sz, OP_INV); } EXPORT_SYMBOL(dma_cache_inv); void dma_cache_wback(unsigned long start, unsigned long sz) { - __dc_line_op(start, sz, OP_FLUSH); + __dc_line_op_k(start, sz, OP_FLUSH); } EXPORT_SYMBOL(dma_cache_wback); @@ -555,7 +567,7 @@ void __sync_icache_dcache(unsigned long paddr, unsigned long vaddr, int len) local_irq_save(flags); __ic_line_inv_vaddr(paddr, vaddr, len); - __dc_line_op(paddr, len, OP_FLUSH); + __dc_line_op(paddr, vaddr, len, OP_FLUSH); local_irq_restore(flags); } @@ -565,9 +577,13 @@ void __inv_icache_page(unsigned long paddr, unsigned long vaddr) __ic_line_inv_vaddr(paddr, vaddr, PAGE_SIZE); } -void __flush_dcache_page(unsigned long paddr) +/* + * wrapper to clearout kernel or userspace mappings of a page + * For kernel mappings @vaddr == @paddr + */ +void __flush_dcache_page(unsigned long paddr, unsigned long vaddr) { - __dc_line_op(paddr, PAGE_SIZE, OP_FLUSH_N_INV); + __dc_line_op(paddr, vaddr & PAGE_MASK, PAGE_SIZE, OP_FLUSH_N_INV); } void flush_icache_all(void) diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index 003d69ac6ffa..5810c7a92b77 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -438,7 +438,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr_unaligned, int dirty = test_and_clear_bit(PG_arch_1, &page->flags); if (dirty) { unsigned long paddr = pte_val(*ptep) & PAGE_MASK; - __flush_dcache_page(paddr); + __flush_dcache_page(paddr, paddr); __inv_icache_page(paddr, vaddr); } } |