diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/amd/car/clear_1m_ram.c | 103 |
1 files changed, 57 insertions, 46 deletions
diff --git a/src/cpu/amd/car/clear_1m_ram.c b/src/cpu/amd/car/clear_1m_ram.c index eabb6db0fe..d4c6600247 100644 --- a/src/cpu/amd/car/clear_1m_ram.c +++ b/src/cpu/amd/car/clear_1m_ram.c @@ -3,58 +3,69 @@ 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" - ); - /* enable caching for first 1M using variable mtrr */ - __asm__ volatile ( - "wrmsr" - : /* No outputs */ - : "c" (0x200), "a" (0 | MTRR_TYPE_WRCOMB), "d" (0) - ); + /* disable cache */ + "movl %%cr0, %%eax\n\t" + "orl $(0x1<<30),%%eax\n\t" + "movl %%eax, %%cr0\n\t" - __asm__ volatile ( - "wrmsr" - : /* No outputs */ - : "c" (0x201), "a" ((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), "d" (0x0000000f) - ); + /* 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" +#if CONFIG_USE_INIT + "movl %%esi, %%eax\n\t" +#else + "movl $((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), %%eax\n\t" +#endif + "wrmsr\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" - ); + /* clear the first 1M */ +#if CONFIG_USE_INIT + "movl %%edi, %%ecx\n\t" +#else + "movl $((CONFIG_LB_MEM_TOPK<<10)>>2), %%ecx\n\t" +#endif + "xorl %%edi, %%edi\n\t" + "cld\n\t" + "xorl %%eax, %%eax\n\t" + "rep stosl\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 */ - __asm__ volatile ( - "wrmsr" - : /* No outputs */ - : "c" (0x200), "a" (0 | MTRR_TYPE_WRBACK), "d" (0) - ); + "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" - __asm__ volatile ( - "wrmsr" - : /* No outputs */ - : "c" (0x201), "a" ((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), "d" (0x0000000f) - ); + "movl $0x201, %%ecx\n\t" + "movl $0x0000000f, %%edx\n\t" +#if CONFIG_USE_INIT + "movl %%esi, %%eax\n\t" +#else + "movl $((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), %%eax\n\t" +#endif + "wrmsr\n\t" - __asm__ volatile ( - /* enable cache */ - "movl %cr0, %eax\n\t" - "andl $0x9fffffff,%eax\n\t" - "movl %eax, %cr0\n\t" - "invd\n\t" + /* enable cache */ + "movl %%cr0, %%eax\n\t" + "andl $0x9fffffff,%%eax\n\t" + "movl %%eax, %%cr0\n\t" + "invd\n\t" + : + : +#if CONFIG_USE_INIT + "S"((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), "D" ((CONFIG_LB_MEM_TOPK<<10)>>2) +#endif ); } |