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* linux/arch/m68k/sun3/dvma.c
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* Written by Sam Creasey
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* Sun3 IOMMU routines used for dvma accesses.
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#include <linux/kernel.h>
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#include <linux/bootmem.h>
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#include <linux/list.h>
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#include <asm/pgtable.h>
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#include <asm/sun3mmu.h>
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static unsigned long ptelist[120];
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static unsigned long dvma_page(unsigned long kaddr, unsigned long vaddr)
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j = *(volatile unsigned long *)kaddr;
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*(volatile unsigned long *)kaddr = j;
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ptep = pfn_pte(virt_to_pfn(kaddr), PAGE_KERNEL);
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// printk("dvma_remap: addr %lx -> %lx pte %08lx len %x\n",
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// kaddr, vaddr, pte, len);
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if(ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] != pte) {
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sun3_put_pte(vaddr, pte);
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ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] = pte;
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return (vaddr + (kaddr & ~PAGE_MASK));
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int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
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vaddr = dvma_btov(baddr);
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dvma_page(kaddr, vaddr);
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void sun3_dvma_init(void)
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memset(ptelist, 0, sizeof(ptelist));