diff options
Diffstat (limited to 'src/cpu/intel/car/non-evict')
| -rw-r--r-- | src/cpu/intel/car/non-evict/Kconfig | 5 | ||||
| -rw-r--r-- | src/cpu/intel/car/non-evict/cache_as_ram.S | 13 |
2 files changed, 18 insertions, 0 deletions
diff --git a/src/cpu/intel/car/non-evict/Kconfig b/src/cpu/intel/car/non-evict/Kconfig new file mode 100644 index 0000000000..faf13e704d --- /dev/null +++ b/src/cpu/intel/car/non-evict/Kconfig @@ -0,0 +1,5 @@ +config CPU_HAS_L2_ENABLE_MSR + bool + help + Select this in Kconfig of CPU sockets/SOC where the CPU + has an MSR to enable the L2 CPU cache 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 d2beaa7d5a..3203159f40 100644 --- a/src/cpu/intel/car/non-evict/cache_as_ram.S +++ b/src/cpu/intel/car/non-evict/cache_as_ram.S @@ -24,6 +24,7 @@ #define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE #define NoEvictMod_MSR 0x2e0 +#define BBL_CR_CTL3_MSR 0x11e .global bootblock_pre_c_entry @@ -133,6 +134,18 @@ addrsize_set_high: orl $MTRR_DEF_TYPE_EN, %eax wrmsr +#if IS_ENABLED(CONFIG_CPU_HAS_L2_ENABLE_MSR) + /* + * Enable the L2 cache. Currently this assumes that this + * only affect socketed CPU's for which this is always valid, + * hence the static preprocesser. + */ + movl $BBL_CR_CTL3_MSR, %ecx + rdmsr + orl $0x100, %eax + wrmsr +#endif + /* Enable cache (CR0.CD = 0, CR0.NW = 0). */ movl %cr0, %eax andl $(~(CR0_CacheDisable | CR0_NoWriteThrough)), %eax |