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author | jake <jake@FreeBSD.org> | 2003-03-17 03:18:56 +0000 |
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committer | jake <jake@FreeBSD.org> | 2003-03-17 03:18:56 +0000 |
commit | 0d1bd6d896a3eedcade2ce101a06fb14b58c6a86 (patch) | |
tree | f1dc8b2fba6347b5cd06b0c5097c6dd8f8f4aae1 | |
parent | 17dd501c20f0cfd9bb1b2baedc85b00830d6d439 (diff) | |
download | FreeBSD-src-0d1bd6d896a3eedcade2ce101a06fb14b58c6a86.zip FreeBSD-src-0d1bd6d896a3eedcade2ce101a06fb14b58c6a86.tar.gz |
Ensure that kstack0 has physical colour equal to virtual colour, so that
illegal aliases will not be created in the data cache if its accessed
through another such mapping.
-rw-r--r-- | sys/sparc64/sparc64/pmap.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/sys/sparc64/sparc64/pmap.c b/sys/sparc64/sparc64/pmap.c index 12372a1..1d6619f 100644 --- a/sys/sparc64/sparc64/pmap.c +++ b/sys/sparc64/sparc64/pmap.c @@ -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; |