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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - arch/m68k/sun3/dvma.c
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 // pr_info("dvma_remap: addr %lx -> %lx pte %08lx\n", kaddr, vaddr, pte);
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 __init
sun3_dvma_init(void)
67 memset(ptelist
, 0, sizeof(ptelist
));