diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cpu/intel/car/non-evict/cache_as_ram.S | 43 |
1 files changed, 36 insertions, 7 deletions
diff --git a/src/cpu/intel/car/non-evict/cache_as_ram.S b/src/cpu/intel/car/non-evict/cache_as_ram.S index 4ac6d29232..d2beaa7d5a 100644 --- a/src/cpu/intel/car/non-evict/cache_as_ram.S +++ b/src/cpu/intel/car/non-evict/cache_as_ram.S @@ -114,6 +114,17 @@ addrsize_set_high: movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax wrmsr + /* Enable cache for our code in Flash because we do XIP here */ + movl $MTRR_PHYS_BASE(1), %ecx + xorl %edx, %edx + movl $CACHE_ROM_BASE | MTRR_TYPE_WRPROT, %eax + wrmsr + + movl $MTRR_PHYS_MASK(1), %ecx + rdmsr + movl $(~(CACHE_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax + wrmsr + post_code(0x25) /* Enable MTRR. */ @@ -128,6 +139,30 @@ addrsize_set_high: invd movl %eax, %cr0 +#if IS_ENABLED(CONFIG_MICROCODE_UPDATE_PRE_RAM) +update_microcode: + /* put the return address in %esp */ + movl $end_microcode_update, %esp + jmp update_bsp_microcode +end_microcode_update: +#endif + /* Disable caching to change MTRR's. */ + movl %cr0, %eax + orl $CR0_CacheDisable, %eax + movl %eax, %cr0 + + /* Clear the mask valid to disable the MTRR */ + movl $MTRR_PHYS_MASK(1), %ecx + rdmsr + andl $(~MTRR_PHYS_MASK_VALID), %eax + wrmsr + + /* Enable cache. */ + movl %cr0, %eax + andl $(~(CR0_CacheDisable | CR0_NoWriteThrough)), %eax + invd + movl %eax, %cr0 + /* enable the 'no eviction' mode */ movl $NoEvictMod_MSR, %ecx rdmsr @@ -154,15 +189,9 @@ addrsize_set_high: orl $CR0_CacheDisable, %eax movl %eax, %cr0 - /* Enable cache for our code in Flash because we do XIP here */ - movl $MTRR_PHYS_BASE(1), %ecx - xorl %edx, %edx - movl $CACHE_ROM_BASE | MTRR_TYPE_WRPROT, %eax - wrmsr - movl $MTRR_PHYS_MASK(1), %ecx rdmsr - movl $(~(CACHE_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax + orl $MTRR_PHYS_MASK_VALID, %eax wrmsr post_code(0x28) |