diff options
Diffstat (limited to 'src/soc/intel/apollolake/bootblock/cache_as_ram.S')
| -rw-r--r-- | src/soc/intel/apollolake/bootblock/cache_as_ram.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/bootblock/cache_as_ram.S b/src/soc/intel/apollolake/bootblock/cache_as_ram.S index 8647206c0a..e8fae28b5b 100644 --- a/src/soc/intel/apollolake/bootblock/cache_as_ram.S +++ b/src/soc/intel/apollolake/bootblock/cache_as_ram.S @@ -17,6 +17,7 @@ */ #include <device/pci_def.h> +#include <commonlib/helpers.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/cache.h> #include <cpu/x86/cr.h> @@ -70,6 +71,7 @@ clear_var_mtrr: post_code(0x24) +#if ((CONFIG_DCACHE_RAM_SIZE & (CONFIG_DCACHE_RAM_SIZE - 1)) == 0) /* Configure CAR region as write-back (WB) */ mov $MTRR_PHYS_BASE(0), %ecx mov $CONFIG_DCACHE_RAM_BASE, %eax @@ -82,6 +84,31 @@ clear_var_mtrr: mov $~(CONFIG_DCACHE_RAM_SIZE - 1), %eax /* size mask */ or $MTRR_PHYS_MASK_VALID, %eax wrmsr +#elif (CONFIG_DCACHE_RAM_SIZE == 768 * KiB) /* 768 KiB */ + mov $MTRR_PHYS_BASE(0), %ecx + mov $CONFIG_DCACHE_RAM_BASE, %eax + or $MTRR_TYPE_WRBACK, %eax + xor %edx,%edx + wrmsr + + mov $MTRR_PHYS_MASK(0), %ecx + mov $~(512 * KiB - 1), %eax /* size mask */ + or $MTRR_PHYS_MASK_VALID, %eax + wrmsr + + mov $MTRR_PHYS_BASE(1), %ecx + mov $(CONFIG_DCACHE_RAM_BASE + 512 * KiB), %eax + or $MTRR_TYPE_WRBACK, %eax + xor %edx,%edx + wrmsr + + mov $MTRR_PHYS_MASK(1), %ecx + mov $~(256 * KiB - 1), %eax /* size mask */ + or $MTRR_PHYS_MASK_VALID, %eax + wrmsr +#else +#error "DCACHE_RAM_SIZE is not a power of 2 and setup code is missing" +#endif post_code(0x25) |