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Add an implementation for pmap_zero_page_area.

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This commit is contained in:
Benno Rice 2002-07-09 13:44:24 +00:00
parent b98807d45e
commit 3495845eec
3 changed files with 72 additions and 3 deletions
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25
sys/powerpc/aim/mmu_oea.c
View File

@ -906,7 +906,30 @@ pmap_zero_page(vm_page_t m)
void
pmap_zero_page_area(vm_page_t m, int off, int size)
{
TODO;
vm_offset_t pa = VM_PAGE_TO_PHYS(m);
caddr_t va;
int i;
if (pa < SEGMENT_LENGTH) {
va = (caddr_t) pa;
} else if (pmap_initialized) {
if (pmap_pvo_zeropage == NULL)
pmap_pvo_zeropage = pmap_rkva_alloc();
pmap_pa_map(pmap_pvo_zeropage, pa, NULL, NULL);
va = (caddr_t)PVO_VADDR(pmap_pvo_zeropage);
} else {
panic("pmap_zero_page: can't zero pa %#x", pa);
}
bzero(va, size);
for (i = size / CACHELINESIZE; i > 0; i--) {
__asm __volatile("dcbz 0,%0" :: "r"(va));
va += CACHELINESIZE;
}
if (pa >= SEGMENT_LENGTH)
pmap_pa_unmap(pmap_pvo_zeropage, NULL, NULL);
}
void

25
sys/powerpc/powerpc/mmu_oea.c
View File

@ -906,7 +906,30 @@ pmap_zero_page(vm_page_t m)
void
pmap_zero_page_area(vm_page_t m, int off, int size)
{
TODO;
vm_offset_t pa = VM_PAGE_TO_PHYS(m);
caddr_t va;
int i;
if (pa < SEGMENT_LENGTH) {
va = (caddr_t) pa;
} else if (pmap_initialized) {
if (pmap_pvo_zeropage == NULL)
pmap_pvo_zeropage = pmap_rkva_alloc();
pmap_pa_map(pmap_pvo_zeropage, pa, NULL, NULL);
va = (caddr_t)PVO_VADDR(pmap_pvo_zeropage);
} else {
panic("pmap_zero_page: can't zero pa %#x", pa);
}
bzero(va, size);
for (i = size / CACHELINESIZE; i > 0; i--) {
__asm __volatile("dcbz 0,%0" :: "r"(va));
va += CACHELINESIZE;
}
if (pa >= SEGMENT_LENGTH)
pmap_pa_unmap(pmap_pvo_zeropage, NULL, NULL);
}
void

25
sys/powerpc/powerpc/pmap.c
View File

@ -906,7 +906,30 @@ pmap_zero_page(vm_page_t m)
void
pmap_zero_page_area(vm_page_t m, int off, int size)
{
TODO;
vm_offset_t pa = VM_PAGE_TO_PHYS(m);
caddr_t va;
int i;
if (pa < SEGMENT_LENGTH) {
va = (caddr_t) pa;
} else if (pmap_initialized) {
if (pmap_pvo_zeropage == NULL)
pmap_pvo_zeropage = pmap_rkva_alloc();
pmap_pa_map(pmap_pvo_zeropage, pa, NULL, NULL);
va = (caddr_t)PVO_VADDR(pmap_pvo_zeropage);
} else {
panic("pmap_zero_page: can't zero pa %#x", pa);
}
bzero(va, size);
for (i = size / CACHELINESIZE; i > 0; i--) {
__asm __volatile("dcbz 0,%0" :: "r"(va));
va += CACHELINESIZE;
}
if (pa >= SEGMENT_LENGTH)
pmap_pa_unmap(pmap_pvo_zeropage, NULL, NULL);
}
void