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-rw-r--r--src/soc/mediatek/mt8192/Makefile.inc1
-rw-r--r--src/soc/mediatek/mt8192/mmu_operations.c30
-rw-r--r--src/soc/mediatek/mt8192/soc.c2
3 files changed, 33 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8192/Makefile.inc b/src/soc/mediatek/mt8192/Makefile.inc
index fb3b11de8c..8b2831cc6b 100644
--- a/src/soc/mediatek/mt8192/Makefile.inc
+++ b/src/soc/mediatek/mt8192/Makefile.inc
@@ -30,6 +30,7 @@ ramstage-y += flash_controller.c
ramstage-y += ../common/gpio.c gpio.c
ramstage-y += emi.c
ramstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
+ramstage-y += ../common/mmu_operations.c mmu_operations.c
ramstage-y += ../common/mtcmos.c mtcmos.c
ramstage-y += soc.c
ramstage-y += ../common/timer.c
diff --git a/src/soc/mediatek/mt8192/mmu_operations.c b/src/soc/mediatek/mt8192/mmu_operations.c
new file mode 100644
index 0000000000..fb3620eb82
--- /dev/null
+++ b/src/soc/mediatek/mt8192/mmu_operations.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/mmio.h>
+#include <soc/mcucfg.h>
+#include <soc/mmu_operations.h>
+
+DEFINE_BIT(MP0_CLUSTER_CFG0_L3_SHARE_EN, 9)
+DEFINE_BIT(MP0_CLUSTER_CFG0_L3_SHARE_PRE_EN, 8)
+
+void mtk_soc_disable_l2c_sram(void)
+{
+ unsigned long v;
+
+ SET32_BITFIELDS(&mt8192_mcucfg->mp0_cluster_cfg0,
+ MP0_CLUSTER_CFG0_L3_SHARE_EN, 0);
+ dsb();
+
+ __asm__ volatile ("mrs %0, S3_0_C15_C3_5" : "=r" (v));
+ v |= (0xf << 4);
+ __asm__ volatile ("msr S3_0_C15_C3_5, %0" : : "r" (v));
+ dsb();
+
+ do {
+ __asm__ volatile ("mrs %0, S3_0_C15_C3_7" : "=r" (v));
+ } while (((v >> 0x4) & 0xf) != 0xf);
+
+ SET32_BITFIELDS(&mt8192_mcucfg->mp0_cluster_cfg0,
+ MP0_CLUSTER_CFG0_L3_SHARE_PRE_EN, 0);
+ dsb();
+}
diff --git a/src/soc/mediatek/mt8192/soc.c b/src/soc/mediatek/mt8192/soc.c
index 9850fa6fbe..6978406cac 100644
--- a/src/soc/mediatek/mt8192/soc.c
+++ b/src/soc/mediatek/mt8192/soc.c
@@ -2,6 +2,7 @@
#include <device/device.h>
#include <soc/emi.h>
+#include <soc/mmu_operations.h>
#include <symbols.h>
static void soc_read_resources(struct device *dev)
@@ -11,6 +12,7 @@ static void soc_read_resources(struct device *dev)
static void soc_init(struct device *dev)
{
+ mtk_mmu_disable_l2c_sram();
}
static struct device_operations soc_ops = {