Date: Thu, 25 Mar 2010 17:03:52 +0000 (UTC) From: Jung-uk Kim <jkim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r205649 - head/sys/compat/x86bios Message-ID: <201003251703.o2PH3q2Q083074@svn.freebsd.org>
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Author: jkim Date: Thu Mar 25 17:03:52 2010 New Revision: 205649 URL: http://svn.freebsd.org/changeset/base/205649 Log: Optimize real mode page table lookup. Modified: head/sys/compat/x86bios/x86bios.c Modified: head/sys/compat/x86bios/x86bios.c ============================================================================== --- head/sys/compat/x86bios/x86bios.c Thu Mar 25 16:31:05 2010 (r205648) +++ head/sys/compat/x86bios/x86bios.c Thu Mar 25 17:03:52 2010 (r205649) @@ -112,17 +112,16 @@ x86bios_set_fault(struct x86emu *emu, ui static void * x86bios_get_pages(uint32_t offset, size_t size) { - int i; + vm_offset_t page; if (offset + size > X86BIOS_MEM_SIZE + X86BIOS_IVT_SIZE) return (NULL); if (offset >= X86BIOS_MEM_SIZE) offset -= X86BIOS_MEM_SIZE; - i = offset / X86BIOS_PAGE_SIZE; - if (x86bios_map[i] != 0) - return ((void *)(x86bios_map[i] + offset - - i * X86BIOS_PAGE_SIZE)); + page = x86bios_map[offset / X86BIOS_PAGE_SIZE]; + if (page != 0) + return ((void *)(page + offset % X86BIOS_PAGE_SIZE)); return (NULL); }
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