| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2004 - 2007 Paul Mundt |
| 4 | */ |
| 5 | #include <linux/mm.h> |
| 6 | #include <linux/dma-map-ops.h> |
| 7 | #include <asm/cacheflush.h> |
| 8 | #include <asm/addrspace.h> |
| 9 | |
| 10 | void arch_dma_prep_coherent(struct page *page, size_t size) |
| 11 | { |
| 12 | __flush_purge_region(page_address(page), size); |
| 13 | } |
| 14 | |
| 15 | void arch_sync_dma_for_device(phys_addr_t paddr, size_t size, |
| 16 | enum dma_data_direction dir) |
| 17 | { |
| 18 | void *addr = sh_cacheop_vaddr(phys_to_virt(address: paddr)); |
| 19 | |
| 20 | switch (dir) { |
| 21 | case DMA_FROM_DEVICE: /* invalidate only */ |
| 22 | __flush_invalidate_region(addr, size); |
| 23 | break; |
| 24 | case DMA_TO_DEVICE: /* writeback only */ |
| 25 | __flush_wback_region(addr, size); |
| 26 | break; |
| 27 | case DMA_BIDIRECTIONAL: /* writeback and invalidate */ |
| 28 | __flush_purge_region(addr, size); |
| 29 | break; |
| 30 | default: |
| 31 | BUG(); |
| 32 | } |
| 33 | } |
| 34 |