diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2019-01-11 23:56:51 +0100 |
|---|---|---|
| committer | Arthur Heymans <arthur@aheymans.xyz> | 2019-01-15 11:38:01 +0000 |
| commit | 19e7273ec2dc243b4089b9aeeaf7929ff5a20a34 (patch) | |
| tree | 98894887d49e25e325f9d87eb9677e932d112400 /src/cpu/intel/car | |
| parent | 0feaa85233c099b06f84d5a0e1d82575efdba56b (diff) | |
cpu/intel/socket_FCBGA559: Use the non-evict cache as ram setup
Pineview CPUs support a non-eviction mode that ought to be used
during cache as ram setup.
This assumes that all atoms that need to set a special register to
enable L2 cache are socketed and hence uses a static Kconfig option
to set that MSR on affected CPUs.
Tested on Foxconn D41S, still boots.
Change-Id: Iec943f5710314fb7a644d89dbd6d8c425f4ed735
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/30863
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/cpu/intel/car')
| -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 |