1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com> 7 * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org> 8 * swiped from i386, and cloned for MIPS by Geert, polished by Ralf. 9 */ 10#include <linux/config.h> 11#include <linux/types.h> 12#include <linux/mm.h> 13#include <linux/module.h> 14#include <linux/string.h> 15#include <linux/pci.h> 16 17#include <asm/io.h> 18 19void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, 20 dma_addr_t * dma_handle) 21{ 22 void *ret; 23 int gfp = GFP_ATOMIC; 24 25#ifdef CONFIG_ISA 26 if (hwdev == NULL || hwdev->dma_mask != 0xffffffff) 27 gfp |= GFP_DMA; 28#endif 29 ret = (void *) __get_free_pages(gfp, get_order(size)); 30 31 if (ret != NULL) { 32 memset(ret, 0, size); 33 *dma_handle = bus_to_baddr(hwdev->bus, __pa(ret)); 34#ifdef CONFIG_NONCOHERENT_IO 35 dma_cache_wback_inv((unsigned long) ret, size); 36 ret = UNCAC_ADDR(ret); 37#endif 38 } 39 40 return ret; 41} 42 43void pci_free_consistent(struct pci_dev *hwdev, size_t size, 44 void *vaddr, dma_addr_t dma_handle) 45{ 46 unsigned long addr = (unsigned long) vaddr; 47 48#ifdef CONFIG_NONCOHERENT_IO 49 addr = CAC_ADDR(addr); 50#endif 51 free_pages(addr, get_order(size)); 52} 53 54EXPORT_SYMBOL(pci_alloc_consistent); 55EXPORT_SYMBOL(pci_free_consistent); 56