1 files changed, 71 insertions, 0 deletions

diff --git a/arch/m68k/sun3/dvma.c b/arch/m68k/sun3/dvma.c
new file mode 100644
index 000000000000..d2b3093f2405
--- /dev/null
+++ b/arch/m68k/sun3/dvma.c
@@ -0,0 +1,71 @@
+/*
+ * linux/arch/m68k/sun3/dvma.c
+ *
+ * Written by Sam Creasey
+ *
+ * Sun3 IOMMU routines used for dvma accesses.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/list.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/sun3mmu.h>
+#include <asm/dvma.h>
+
+
+static unsigned long ptelist[120];
+
+inline unsigned long dvma_page(unsigned long kaddr, unsigned long vaddr)
+{
+        unsigned long pte;
+        unsigned long j;
+        pte_t ptep;
+
+        j = *(volatile unsigned long *)kaddr;
+        *(volatile unsigned long *)kaddr = j;
+
+        ptep = pfn_pte(virt_to_pfn(kaddr), PAGE_KERNEL);
+        pte = pte_val(ptep);
+//              printk("dvma_remap: addr %lx -> %lx pte %08lx len %x\n",
+//                     kaddr, vaddr, pte, len);
+        if(ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] != pte) {
+                sun3_put_pte(vaddr, pte);
+                ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] = pte;
+        }
+
+        return (vaddr + (kaddr & ~PAGE_MASK));
+
+}
+
+int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
+                              int len)
+{
+
+        unsigned long end;
+        unsigned long vaddr;
+
+        vaddr = dvma_btov(baddr);
+
+        end = vaddr + len;
+
+        while(vaddr < end) {
+                dvma_page(kaddr, vaddr);
+                kaddr += PAGE_SIZE;
+                vaddr += PAGE_SIZE;
+        }
+
+        return 0;
+
+}
+
+void sun3_dvma_init(void)
+{
+
+        memset(ptelist, 0, sizeof(ptelist));
+
+
+}