From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/m68k/apollo/dma.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 arch/m68k/apollo/dma.c

(limited to 'arch/m68k/apollo/dma.c')

diff --git a/arch/m68k/apollo/dma.c b/arch/m68k/apollo/dma.c
new file mode 100644
index 00000000000..aed8be177ef
--- /dev/null
+++ b/arch/m68k/apollo/dma.c
@@ -0,0 +1,50 @@
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/kd.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+
+#include <asm/setup.h>
+#include <asm/bootinfo.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/apollodma.h>
+#include <asm/io.h>
+
+/* note only works for 16 Bit 1 page DMA's */
+
+static unsigned short next_free_xlat_entry=0;
+
+unsigned short dma_map_page(unsigned long phys_addr,int count,int type) {
+
+	unsigned long page_aligned_addr=phys_addr & (~((1<<12)-1));
+	unsigned short start_map_addr=page_aligned_addr >> 10;
+	unsigned short free_xlat_entry, *xlat_map_entry;
+	int i;
+
+	free_xlat_entry=next_free_xlat_entry;
+	for(i=0,xlat_map_entry=addr_xlat_map+(free_xlat_entry<<2);i<8;i++,xlat_map_entry++) {
+#if 0
+		printk("phys_addr: %x, page_aligned_addr: %x, start_map_addr: %x\n",phys_addr,page_aligned_addr,start_map_addr+i);
+#endif
+		out_be16(xlat_map_entry, start_map_addr+i);
+	}
+
+	next_free_xlat_entry+=2;
+	if(next_free_xlat_entry>125)
+		next_free_xlat_entry=0;
+
+#if 0
+	printk("next_free_xlat_entry: %d\n",next_free_xlat_entry);
+#endif
+
+	return free_xlat_entry<<10;
+}
+
+void dma_unmap_page(unsigned short dma_addr) {
+
+	return ;
+
+}
+
-- 
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