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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [mips64/] [kernel/] [pci-dma.c] - Rev 1275
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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);
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