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-rw-r--r--src/soc/intel/quark/bootblock/bootblock.c37
-rw-r--r--src/soc/intel/quark/include/soc/reg_access.h1
2 files changed, 38 insertions, 0 deletions
diff --git a/src/soc/intel/quark/bootblock/bootblock.c b/src/soc/intel/quark/bootblock/bootblock.c
index 4aa774b259..959084d935 100644
--- a/src/soc/intel/quark/bootblock/bootblock.c
+++ b/src/soc/intel/quark/bootblock/bootblock.c
@@ -18,6 +18,7 @@
#include <device/pci_def.h>
#include <program_loading.h>
#include <soc/iomap.h>
+#include <soc/intel/common/util.h>
#include <soc/pci_devs.h>
#include <soc/reg_access.h>
@@ -47,8 +48,38 @@ static const struct reg_script hsuart_init[] = {
REG_SCRIPT_END
};
+static const struct reg_script mtrr_init[] = {
+ /* Use write-through caching, for FSP 2.0 the cache will be invalidated
+ * postchar (arch/x86/exit_car.S).
+ */
+
+ /* Enable the cache */
+ REG_CPU_CR_AND(0, ~(CR0_CD | CR0_NW)),
+
+ /* Cache the SPI flash */
+ REG_MSR_WRITE(MTRR_PHYS_BASE(0), (uint32_t)((-CONFIG_ROM_SIZE)
+ | MTRR_TYPE_WRTHROUGH)),
+ REG_MSR_WRITE(MTRR_PHYS_MASK(0), (uint32_t)((-CONFIG_ROM_SIZE)
+ | MTRR_PHYS_MASK_VALID)),
+
+ /* Cache ESRAM */
+ REG_MSR_WRITE(MTRR_PHYS_BASE(1), (uint32_t)(0x80000000
+ | MTRR_TYPE_WRTHROUGH)),
+ REG_MSR_WRITE(MTRR_PHYS_MASK(1), (uint32_t)((~0x7ffff)
+ | MTRR_PHYS_MASK_VALID)),
+
+ /* Enable the variable MTRRs */
+ REG_MSR_WRITE(MTRR_DEF_TYPE_MSR, MTRR_DEF_TYPE_EN
+ | MTRR_TYPE_UNCACHEABLE),
+
+ REG_SCRIPT_END
+};
+
void bootblock_soc_early_init(void)
{
+ /* Initialize the MTRRs */
+ reg_script_run(mtrr_init);
+
/* Initialize the controllers */
reg_script_run_on_dev(I2CGPIO_BDF, i2c_gpio_controller_init);
reg_script_run_on_dev(LPC_BDF, legacy_gpio_init);
@@ -60,6 +91,12 @@ void bootblock_soc_early_init(void)
reg_script_run_on_dev(HSUART1_BDF, hsuart_init);
}
+void bootblock_soc_init(void)
+{
+ /* Display the MTRRs */
+ soc_display_mtrrs();
+}
+
void platform_prog_run(struct prog *prog)
{
/* Display the program entry point */
diff --git a/src/soc/intel/quark/include/soc/reg_access.h b/src/soc/intel/quark/include/soc/reg_access.h
index a07bd22d9a..0e64917177 100644
--- a/src/soc/intel/quark/include/soc/reg_access.h
+++ b/src/soc/intel/quark/include/soc/reg_access.h
@@ -20,6 +20,7 @@
#include <arch/io.h>
#include <cpu/x86/msr.h>
+#include <cpu/x86/mtrr.h>
#include <delay.h>
#include <fsp/util.h>
#include <reg_script.h>