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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/sun3/dvma.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
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)); + + +} |