patch-2.4.6 linux/arch/mips/kernel/pci-dma.c

• Lines: 42
• Date: Mon Jul 2 13:56:40 2001
• Orig file: v2.4.5/linux/arch/mips/kernel/pci-dma.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/arch/mips/kernel/pci-dma.c linux/arch/mips/kernel/pci-dma.c
@@ -0,0 +1,41 @@
+/*
+ * 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  Ralf Baechle <ralf@gnu.org>
+ * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+ */
+#include <linux/types.h>
+#include <linux/mm.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;
+
+	if (hwdev == NULL || hwdev->dma_mask != 0xffffffff)
+		gfp |= GFP_DMA;
+	ret = (void *) __get_free_pages(gfp, get_order(size));
+
+	if (ret != NULL) {
+		memset(ret, 0, size);
+		dma_cache_wback_inv((unsigned long) ret, size);
+		*dma_handle = virt_to_bus(ret);
+		ret = KSEG1ADDR(ret);
+	}
+
+	return ret;
+}
+
+void pci_free_consistent(struct pci_dev *hwdev, size_t size,
+			 void *vaddr, dma_addr_t dma_handle)
+{
+	free_pages((unsigned long) KSEG0ADDR(vaddr), get_order(size));
+}