diff options
Diffstat (limited to 'src/soc/intel/apollolake/bootblock/bootblock.c')
| -rw-r--r-- | src/soc/intel/apollolake/bootblock/bootblock.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/bootblock/bootblock.c b/src/soc/intel/apollolake/bootblock/bootblock.c index 63b023d26d..2e51d48ebf 100644 --- a/src/soc/intel/apollolake/bootblock/bootblock.c +++ b/src/soc/intel/apollolake/bootblock/bootblock.c @@ -16,6 +16,7 @@ */ #include <arch/cpu.h> #include <bootblock_common.h> +#include <cpu/x86/pae.h> #include <device/pci.h> #include <intelblocks/cpulib.h> #include <intelblocks/fast_spi.h> @@ -116,4 +117,13 @@ void bootblock_soc_early_init(void) reg = inl(ACPI_BASE_ADDRESS + TCO1_CNT); reg |= TCO_TMR_HLT; outl(reg, ACPI_BASE_ADDRESS + TCO1_CNT); + + /* Use Nx and paging to prevent the frontend from writing back dirty + * cache-as-ram lines to backing store that doesn't exist when the L1I + * speculatively fetches a line that is sitting in the L1D. */ + if (IS_ENABLED(CONFIG_PAGING_IN_CACHE_AS_RAM)) { + paging_set_nxe(1); + paging_set_default_pat(); + paging_enable_for_car("pdpt", "pt"); + } } |