diff options
Diffstat (limited to 'arch/m68k/sun3/dvma.c')
-rw-r--r-- | arch/m68k/sun3/dvma.c | 71 |
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 0000000..d2b3093 --- /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)); + + +} |