2 * linux/arch/m68k/sun3/dvma.c
4 * Written by Sam Creasey
6 * Sun3 IOMMU routines used for dvma accesses.
10 #include <linux/kernel.h>
12 #include <linux/bootmem.h>
13 #include <linux/list.h>
15 #include <asm/pgtable.h>
16 #include <asm/sun3mmu.h>
20 static unsigned long ptelist[120];
22 static unsigned long dvma_page(unsigned long kaddr, unsigned long vaddr)
28 j = *(volatile unsigned long *)kaddr;
29 *(volatile unsigned long *)kaddr = j;
31 ptep = pfn_pte(virt_to_pfn(kaddr), PAGE_KERNEL);
33 // printk("dvma_remap: addr %lx -> %lx pte %08lx len %x\n",
34 // kaddr, vaddr, pte, len);
35 if(ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] != pte) {
36 sun3_put_pte(vaddr, pte);
37 ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] = pte;
40 return (vaddr + (kaddr & ~PAGE_MASK));
44 int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
51 vaddr = dvma_btov(baddr);
56 dvma_page(kaddr, vaddr);
65 void sun3_dvma_init(void)
68 memset(ptelist, 0, sizeof(ptelist));