1 files changed, 50 insertions, 0 deletions

diff --git a/arch/m68k/apollo/dma.c b/arch/m68k/apollo/dma.c
new file mode 100644
index 000000000000..aed8be177ef1
--- /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 ;
+
+}
+