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/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>

 * Copyright (C) 2000, 2001  Ralf Baechle <ralf@gnu.org>

 * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.

 */

#include <linux/config.h>

#include <linux/types.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/string.h>

#include <linux/pci.h>

#include <asm/io.h>

void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,

                           dma_addr_t * dma_handle)

{

        void *ret;

        int gfp = GFP_ATOMIC;

        struct pci_bus *bus = NULL;

#ifdef CONFIG_ISA

        if (hwdev == NULL || hwdev->dma_mask != 0xffffffff)

                gfp |= GFP_DMA;

#endif

        ret = (void *) __get_free_pages(gfp, get_order(size));

        if (ret != NULL) {

                memset(ret, 0, size);

                if (hwdev)

                        bus = hwdev->bus;

                *dma_handle = bus_to_baddr(bus, __pa(ret));

#ifdef CONFIG_NONCOHERENT_IO

                dma_cache_wback_inv((unsigned long) ret, size);

                ret = UNCAC_ADDR(ret);

#endif

        }

        return ret;

}

void pci_free_consistent(struct pci_dev *hwdev, size_t size,

                         void *vaddr, dma_addr_t dma_handle)

{

        unsigned long addr = (unsigned long) vaddr;

#ifdef CONFIG_NONCOHERENT_IO

        addr = CAC_ADDR(addr);

#endif

        free_pages(addr, get_order(size));

}

EXPORT_SYMBOL(pci_alloc_consistent);

EXPORT_SYMBOL(pci_free_consistent);