| /* |
| * linux/arch/arm/mm/cache-v3.S |
| * |
| * Copyright (C) 1997-2002 Russell king |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/linkage.h> |
| #include <linux/init.h> |
| #include <asm/page.h> |
| #include "proc-macros.S" |
| |
| /* |
| * flush_user_cache_all() |
| * |
| * Invalidate all cache entries in a particular address |
| * space. |
| * |
| * - mm - mm_struct describing address space |
| */ |
| ENTRY(v3_flush_user_cache_all) |
| /* FALLTHROUGH */ |
| /* |
| * flush_kern_cache_all() |
| * |
| * Clean and invalidate the entire cache. |
| */ |
| ENTRY(v3_flush_kern_cache_all) |
| /* FALLTHROUGH */ |
| |
| /* |
| * flush_user_cache_range(start, end, flags) |
| * |
| * Invalidate a range of cache entries in the specified |
| * address space. |
| * |
| * - start - start address (may not be aligned) |
| * - end - end address (exclusive, may not be aligned) |
| * - flags - vma_area_struct flags describing address space |
| */ |
| ENTRY(v3_flush_user_cache_range) |
| mov ip, #0 |
| mcreq p15, 0, ip, c7, c0, 0 @ flush ID cache |
| mov pc, lr |
| |
| /* |
| * coherent_kern_range(start, end) |
| * |
| * Ensure coherency between the Icache and the Dcache in the |
| * region described by start. If you have non-snooping |
| * Harvard caches, you need to implement this function. |
| * |
| * - start - virtual start address |
| * - end - virtual end address |
| */ |
| ENTRY(v3_coherent_kern_range) |
| /* FALLTHROUGH */ |
| |
| /* |
| * coherent_user_range(start, end) |
| * |
| * Ensure coherency between the Icache and the Dcache in the |
| * region described by start. If you have non-snooping |
| * Harvard caches, you need to implement this function. |
| * |
| * - start - virtual start address |
| * - end - virtual end address |
| */ |
| ENTRY(v3_coherent_user_range) |
| mov pc, lr |
| |
| /* |
| * flush_kern_dcache_area(void *page, size_t size) |
| * |
| * Ensure no D cache aliasing occurs, either with itself or |
| * the I cache |
| * |
| * - addr - kernel address |
| * - size - region size |
| */ |
| ENTRY(v3_flush_kern_dcache_area) |
| /* FALLTHROUGH */ |
| |
| /* |
| * dma_inv_range(start, end) |
| * |
| * Invalidate (discard) the specified virtual address range. |
| * May not write back any entries. If 'start' or 'end' |
| * are not cache line aligned, those lines must be written |
| * back. |
| * |
| * - start - virtual start address |
| * - end - virtual end address |
| */ |
| ENTRY(v3_dma_inv_range) |
| /* FALLTHROUGH */ |
| |
| /* |
| * dma_flush_range(start, end) |
| * |
| * Clean and invalidate the specified virtual address range. |
| * |
| * - start - virtual start address |
| * - end - virtual end address |
| */ |
| ENTRY(v3_dma_flush_range) |
| mov r0, #0 |
| mcr p15, 0, r0, c7, c0, 0 @ flush ID cache |
| /* FALLTHROUGH */ |
| |
| /* |
| * dma_clean_range(start, end) |
| * |
| * Clean (write back) the specified virtual address range. |
| * |
| * - start - virtual start address |
| * - end - virtual end address |
| */ |
| ENTRY(v3_dma_clean_range) |
| mov pc, lr |
| |
| /* |
| * dma_unmap_area(start, size, dir) |
| * - start - kernel virtual start address |
| * - size - size of region |
| * - dir - DMA direction |
| */ |
| ENTRY(v3_dma_unmap_area) |
| teq r2, #DMA_TO_DEVICE |
| bne v3_dma_inv_range |
| /* FALLTHROUGH */ |
| |
| /* |
| * dma_map_area(start, size, dir) |
| * - start - kernel virtual start address |
| * - size - size of region |
| * - dir - DMA direction |
| */ |
| ENTRY(v3_dma_map_area) |
| mov pc, lr |
| ENDPROC(v3_dma_unmap_area) |
| ENDPROC(v3_dma_map_area) |
| |
| __INITDATA |
| |
| .type v3_cache_fns, #object |
| ENTRY(v3_cache_fns) |
| .long v3_flush_kern_cache_all |
| .long v3_flush_user_cache_all |
| .long v3_flush_user_cache_range |
| .long v3_coherent_kern_range |
| .long v3_coherent_user_range |
| .long v3_flush_kern_dcache_area |
| .long v3_dma_map_area |
| .long v3_dma_unmap_area |
| .long v3_dma_inv_range |
| .long v3_dma_clean_range |
| .long v3_dma_flush_range |
| .size v3_cache_fns, . - v3_cache_fns |