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Ensure that kstack0 has physical colour equal to virtual colour, so that

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illegal aliases will not be created in the data cache if its accessed
through another such mapping.
This commit is contained in:
Jake Burkholder 2003-03-17 03:18:56 +00:00
parent 9f77ba59c5
commit b17d5f7dda
1 changed files with 11 additions and 4 deletions
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15
sys/sparc64/sparc64/pmap.c
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@ -399,12 +399,19 @@ pmap_bootstrap(vm_offset_t ekva)
/*
* Allocate a kernel stack with guard page for thread0 and map it into
* the kernel tsb.
* the kernel tsb. We must ensure that the virtual address is coloured
* properly, since we're allocating from phys_avail so the memory won't
* have an associated vm_page_t.
*/
pa = pmap_bootstrap_alloc(KSTACK_PAGES * PAGE_SIZE);
pa = pmap_bootstrap_alloc(roundup(KSTACK_PAGES, DCACHE_COLORS) *
PAGE_SIZE);
kstack0_phys = pa;
kstack0 = virtual_avail + (KSTACK_GUARD_PAGES * PAGE_SIZE);
virtual_avail += (KSTACK_PAGES + KSTACK_GUARD_PAGES) * PAGE_SIZE;
virtual_avail += roundup(KSTACK_GUARD_PAGES, DCACHE_COLORS) *
PAGE_SIZE;
kstack0 = virtual_avail;
virtual_avail += roundup(KSTACK_PAGES, DCACHE_COLORS) * PAGE_SIZE;
KASSERT(DCACHE_COLOR(kstack0) == DCACHE_COLOR(kstack0_phys),
("pmap_bootstrap: kstack0 miscoloured"));
for (i = 0; i < KSTACK_PAGES; i++) {
pa = kstack0_phys + i * PAGE_SIZE;
va = kstack0 + i * PAGE_SIZE;