Date: Tue, 5 Jan 2010 06:58:54 +0000 (UTC) From: Neel Natu <neel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r201563 - projects/mips/sys/mips/mips Message-ID: <201001050658.o056ws7Z019771@svn.freebsd.org>
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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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