From c3b360022258c4cfb7413cb88457f0c10ab396fa Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Wed, 7 Dec 2005 19:02:45 +0000 Subject: use CONFIG_LB_MEM_TOPK instead 1M hardcode from issue 50 git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2139 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- src/cpu/amd/car/clear_1m_ram.c | 88 ++++++++++++++++++++++-------------------- 1 file changed, 46 insertions(+), 42 deletions(-) (limited to 'src') diff --git a/src/cpu/amd/car/clear_1m_ram.c b/src/cpu/amd/car/clear_1m_ram.c index 80b215e502..eabb6db0fe 100644 --- a/src/cpu/amd/car/clear_1m_ram.c +++ b/src/cpu/amd/car/clear_1m_ram.c @@ -3,54 +3,58 @@ static inline __attribute__((always_inline)) void clear_1m_ram(void) { __asm__ volatile ( + /* disable cache */ + "movl %cr0, %eax\n\t" + "orl $(0x1<<30),%eax\n\t" + "movl %eax, %cr0\n\t" + ); - /* disable cache */ - "movl %cr0, %eax\n\t" - "orl $(0x1<<30),%eax\n\t" - "movl %eax, %cr0\n\t" - - /* enable caching for first 1M using variable mtrr */ - "movl $0x200, %ecx\n\t" - "xorl %edx, %edx\n\t" - "movl $(0 | 1), %eax\n\t" -// "movl $(0 | MTRR_TYPE_WRCOMB), %eax\n\t" - "wrmsr\n\t" - - "movl $0x201, %ecx\n\t" - "movl $0x0000000f, %edx\n\t" - "movl $((~(( 0 + 0x100000) - 1)) | 0x800), %eax\n\t" - "wrmsr\n\t" + /* enable caching for first 1M using variable mtrr */ + __asm__ volatile ( + "wrmsr" + : /* No outputs */ + : "c" (0x200), "a" (0 | MTRR_TYPE_WRCOMB), "d" (0) + ); - /* clear the first 1M */ - "movl $0x0, %edi\n\t" - "cld\n\t" - "movl $(0x100000>>2), %ecx\n\t" - "xorl %eax, %eax\n\t" - "rep stosl\n\t" + __asm__ volatile ( + "wrmsr" + : /* No outputs */ + : "c" (0x201), "a" ((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), "d" (0x0000000f) + ); - /* disable cache */ - "movl %cr0, %eax\n\t" - "orl $(0x1<<30),%eax\n\t" - "movl %eax, %cr0\n\t" + __asm__ volatile( + /* clear the first 1M */ + "cld\n\t" + "rep stosl\n\t" + : + : "a"(0), "D"(0) ,"c" ((CONFIG_LB_MEM_TOPK<<10)>>2) + ); + + __asm__ volatile ( + /* disable cache */ + "movl %cr0, %eax\n\t" + "orl $(0x1<<30),%eax\n\t" + "movl %eax, %cr0\n\t" + ); /* enable caching for first 1M using variable mtrr */ - "movl $0x200, %ecx\n\t" - "xorl %edx, %edx\n\t" - "movl $(0 | 6), %eax\n\t" -// "movl $(0 | MTRR_TYPE_WRBACK), %eax\n\t" - "wrmsr\n\t" - - "movl $0x201, %ecx\n\t" - "movl $0x0000000f, %edx\n\t" - "movl $((~(( 0 + 0x100000) - 1)) | 0x800), %eax\n\t" - "wrmsr\n\t" - + __asm__ volatile ( + "wrmsr" + : /* No outputs */ + : "c" (0x200), "a" (0 | MTRR_TYPE_WRBACK), "d" (0) + ); - /* enable cache */ - "movl %cr0, %eax\n\t" - "andl $0x9fffffff,%eax\n\t" - "movl %eax, %cr0\n\t" - "invd\n\t" + __asm__ volatile ( + "wrmsr" + : /* No outputs */ + : "c" (0x201), "a" ((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), "d" (0x0000000f) + ); + __asm__ volatile ( + /* enable cache */ + "movl %cr0, %eax\n\t" + "andl $0x9fffffff,%eax\n\t" + "movl %eax, %cr0\n\t" + "invd\n\t" ); } -- cgit v1.2.3