2 * linux/arch/m68k/sun3/dvma.c
4 * Written by Sam Creasey
6 * Sun3 IOMMU routines used for dvma accesses.
10 #include <linux/init.h>
11 #include <linux/kernel.h>
13 #include <linux/bootmem.h>
14 #include <linux/list.h>
16 #include <asm/pgtable.h>
17 #include <asm/sun3mmu.h>
21 static unsigned long ptelist[120];
23 static unsigned long dvma_page(unsigned long kaddr, unsigned long vaddr)
29 j = *(volatile unsigned long *)kaddr;
30 *(volatile unsigned long *)kaddr = j;
32 ptep = pfn_pte(virt_to_pfn(kaddr), PAGE_KERNEL);
34 // printk("dvma_remap: addr %lx -> %lx pte %08lx len %x\n",
35 // kaddr, vaddr, pte, len);
36 if(ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] != pte) {
37 sun3_put_pte(vaddr, pte);
38 ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] = pte;
41 return (vaddr + (kaddr & ~PAGE_MASK));
45 int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
52 vaddr = dvma_btov(baddr);
57 dvma_page(kaddr, vaddr);
66 void __init sun3_dvma_init(void)
68 memset(ptelist, 0, sizeof(ptelist));