svn commit: r201563 - projects/mips/sys/mips/mips
Neel Natu
neel at FreeBSD.org
Tue Jan 5 06:58:54 UTC 2010
Author: neel
Date: Tue Jan 5 06:58:54 2010
New Revision: 201563
URL: http://svn.freebsd.org/changeset/base/201563
Log:
This change increases the size of the kernel stack for thread0 from
PAGE_SIZE to (2 * PAGE_SIZE). It depends on the memory allocated by
pmap_steal_memory() being aligned to a PAGE_SIZE boundary.
Approved by: imp (mentor)
Modified:
projects/mips/sys/mips/mips/machdep.c
projects/mips/sys/mips/mips/pmap.c
Modified: projects/mips/sys/mips/mips/machdep.c
==============================================================================
--- projects/mips/sys/mips/mips/machdep.c Tue Jan 5 06:43:29 2010 (r201562)
+++ projects/mips/sys/mips/mips/machdep.c Tue Jan 5 06:58:54 2010 (r201563)
@@ -260,8 +260,11 @@ mips_proc0_init(void)
{
proc_linkup0(&proc0, &thread0);
+ KASSERT((kstack0 & PAGE_MASK) == 0,
+ ("kstack0 is not aligned on a page boundary: 0x%0lx",
+ (long)kstack0));
thread0.td_kstack = kstack0;
- thread0.td_kstack_pages = KSTACK_PAGES - 1;
+ thread0.td_kstack_pages = KSTACK_PAGES;
thread0.td_md.md_realstack = roundup2(thread0.td_kstack, PAGE_SIZE * 2);
/*
* Do not use cpu_thread_alloc to initialize these fields
Modified: projects/mips/sys/mips/mips/pmap.c
==============================================================================
--- projects/mips/sys/mips/mips/pmap.c Tue Jan 5 06:43:29 2010 (r201562)
+++ projects/mips/sys/mips/mips/pmap.c Tue Jan 5 06:58:54 2010 (r201563)
@@ -291,6 +291,12 @@ pmap_bootstrap(void)
/* Sort. */
again:
for (i = 0; phys_avail[i + 1] != 0; i += 2) {
+ /*
+ * Keep the memory aligned on page boundary.
+ */
+ phys_avail[i] = round_page(phys_avail[i]);
+ phys_avail[i + 1] = trunc_page(phys_avail[i + 1]);
+
if (phys_avail[i + 1] >= MIPS_KSEG0_LARGEST_PHYS)
memory_larger_than_512meg++;
if (i < 2)
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