// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2004 - 2007  Paul Mundt
 */
#include <linux/mm.h>
#include <linux/dma-map-ops.h>
#include <asm/cacheflush.h>
#include <asm/addrspace.h>

void arch_dma_prep_coherent(struct page *page, size_t size)
{
        __flush_purge_region(page_address(page), size);
}

void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
                enum dma_data_direction dir)
{
        void *addr = sh_cacheop_vaddr(phys_to_virt(paddr));

        switch (dir) {
        case DMA_FROM_DEVICE:           /* invalidate only */
                __flush_invalidate_region(addr, size);
                break;
        case DMA_TO_DEVICE:             /* writeback only */
                __flush_wback_region(addr, size);
                break;
        case DMA_BIDIRECTIONAL:         /* writeback and invalidate */
                __flush_purge_region(addr, size);
                break;
        default:
                BUG();
        }
}