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In mmu_booke_mapdev(), handle mappings that cannot be represented

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by a single TLB entry. The boot ROM on the MPC85555CDS is 8MB, for
example, and in order to map that we need 2 4MB TLB entries.
This commit is contained in:
Marcel Moolenaar 2008-10-25 03:36:21 +00:00
parent d27755a283
commit 9b85e175fd
1 changed files with 16 additions and 5 deletions
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21
sys/powerpc/booke/pmap.c
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@ -2296,14 +2296,25 @@ mmu_booke_dev_direct_mapped(mmu_t mmu, vm_offset_t pa, vm_size_t size)
static void *
mmu_booke_mapdev(mmu_t mmu, vm_offset_t pa, vm_size_t size)
{
void *res;
uintptr_t va;
vm_size_t sz;
va = (pa >= 0x80000000) ? pa : (0xe2000000 + pa);
if (bootverbose)
printf("Wiring VA=%x to PA=%x (size=%x), using TLB1[%d]\n",
va, pa, size, tlb1_idx);
tlb1_set_entry(va, pa, size, _TLB_ENTRY_IO);
return ((void *)va);
res = (void *)va;
do {
sz = 1 << (ilog2(size) & ~1);
if (bootverbose)
printf("Wiring VA=%x to PA=%x (size=%x), "
"using TLB1[%d]\n", va, pa, sz, tlb1_idx);
tlb1_set_entry(va, pa, sz, _TLB_ENTRY_IO);
size -= sz;
pa += sz;
va += sz;
} while (size > 0);
return (res);
}
/*