drivers: marvell: add support for mapping the entire LLC to SRAM
Add llc_sram_enable() and llc_sram_disable() APIs to Marvell
cache_lls driver.
Add LLC_SRAM definition to Marvell common makefile - disabled
by the default.
Add description of LLC_SRAM flag to the build documentation.
Change-Id: Ib348e09752ce1206d29268ef96c9018b781db182
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
diff --git a/docs/plat/marvell/armada/build.rst b/docs/plat/marvell/armada/build.rst
index 6f28721..bec0bcb 100644
--- a/docs/plat/marvell/armada/build.rst
+++ b/docs/plat/marvell/armada/build.rst
@@ -77,6 +77,13 @@
Flag defining the LLC (L3) cache state. The cache is enabled by default (``LLC_ENABLE=1``).
+- LLC_SRAM
+
+ Flag defining the LLC (L3) cache SRAM support. The feature is
+ disabled by default (``LLC_ENABLE=0``).
+ When LLC SRAM is enabled, the secure payload (BL32) is loaded into this
+ SRAM area instead of the DRAM.
+
- MARVELL_SECURE_BOOT
Build trusted(=1)/non trusted(=0) image, default is non trusted.
diff --git a/drivers/marvell/cache_llc.c b/drivers/marvell/cache_llc.c
index 9b614c4..836aae7 100644
--- a/drivers/marvell/cache_llc.c
+++ b/drivers/marvell/cache_llc.c
@@ -109,3 +109,41 @@
reg |= (0x1 << CCU_SET_POC_OFFSET);
mmio_write_32(CCU_HTC_CR(ap_index), reg);
}
+
+#if LLC_SRAM
+void llc_sram_enable(int ap_index)
+{
+ uint32_t tc, way;
+ uint32_t way_addr;
+
+ /* Lockdown all available ways for all traffic classes */
+ for (tc = 0; tc < LLC_TC_NUM; tc++)
+ mmio_write_32(LLC_TCN_LOCK(ap_index, tc), LLC_WAY_MASK);
+
+ /* Clear the high bits of SRAM address */
+ mmio_write_32(LLC_BANKED_MNT_AHR(ap_index), 0);
+
+ way_addr = PLAT_MARVELL_TRUSTED_RAM_BASE;
+ for (way = 0; way < LLC_WAYS; way++) {
+ /* Trigger allocation block command */
+ mmio_write_32(LLC_BLK_ALOC(ap_index),
+ LLC_BLK_ALOC_BASE_ADDR(way_addr) |
+ LLC_BLK_ALOC_WAY_DATA_CLR |
+ LLC_BLK_ALOC_WAY_ID(way));
+ way_addr += LLC_WAY_SIZE;
+ }
+ llc_enable(ap_index, 1);
+}
+
+void llc_sram_disable(int ap_index)
+{
+ uint32_t tc;
+
+ /* Disable the line lockings */
+ for (tc = 0; tc < LLC_TC_NUM; tc++)
+ mmio_write_32(LLC_TCN_LOCK(ap_index, tc), 0);
+
+ /* Invalidate all ways */
+ llc_inv_all(ap_index);
+}
+#endif /* LLC_SRAM */
diff --git a/include/drivers/marvell/cache_llc.h b/include/drivers/marvell/cache_llc.h
index d8eca9f..b326474 100644
--- a/include/drivers/marvell/cache_llc.h
+++ b/include/drivers/marvell/cache_llc.h
@@ -13,17 +13,18 @@
#define CACHE_LLC_H
#define LLC_CTRL(ap) (MVEBU_LLC_BASE(ap) + 0x100)
+#define LLC_SECURE_CTRL(ap) (MVEBU_LLC_BASE(ap) + 0x10C)
#define LLC_SYNC(ap) (MVEBU_LLC_BASE(ap) + 0x700)
#define LLC_BANKED_MNT_AHR(ap) (MVEBU_LLC_BASE(ap) + 0x724)
#define LLC_INV_WAY(ap) (MVEBU_LLC_BASE(ap) + 0x77C)
#define LLC_BLK_ALOC(ap) (MVEBU_LLC_BASE(ap) + 0x78c)
#define LLC_CLEAN_WAY(ap) (MVEBU_LLC_BASE(ap) + 0x7BC)
#define LLC_CLEAN_INV_WAY(ap) (MVEBU_LLC_BASE(ap) + 0x7FC)
-#define LLC_TC0_LOCK(ap) (MVEBU_LLC_BASE(ap) + 0x920)
+#define LLC_TCN_LOCK(ap, tc) (MVEBU_LLC_BASE(ap) + 0x920 + 4 * (tc))
#define MASTER_LLC_CTRL LLC_CTRL(MVEBU_AP0)
#define MASTER_LLC_INV_WAY LLC_INV_WAY(MVEBU_AP0)
-#define MASTER_LLC_TC0_LOCK LLC_TC0_LOCK(MVEBU_AP0)
+#define MASTER_LLC_TC0_LOCK LLC_TCN_LOCK(MVEBU_AP0, 0)
#define LLC_CTRL_EN 1
#define LLC_EXCLUSIVE_EN 0x100
@@ -34,7 +35,13 @@
#define LLC_WAY_MASK ((1 << LLC_WAYS) - 1)
#define LLC_SIZE (1024 * 1024)
#define LLC_WAY_SIZE (LLC_SIZE / LLC_WAYS)
+#define LLC_TC_NUM 15
+#define LLC_BLK_ALOC_WAY_ID(way) ((way) & 0x1f)
+#define LLC_BLK_ALOC_WAY_DATA_DSBL (0x0 << 6)
+#define LLC_BLK_ALOC_WAY_DATA_CLR (0x1 << 6)
+#define LLC_BLK_ALOC_WAY_DATA_SET (0x3 << 6)
+#define LLC_BLK_ALOC_BASE_ADDR(addr) ((addr) & (LLC_WAY_SIZE - 1))
#ifndef __ASSEMBLER__
void llc_cache_sync(int ap_index);
@@ -45,6 +52,10 @@
void llc_enable(int ap_index, int excl_mode);
int llc_is_exclusive(int ap_index);
void llc_runtime_enable(int ap_index);
-#endif
+#if LLC_SRAM
+void llc_sram_enable(int ap_index);
+void llc_sram_disable(int ap_index);
+#endif /* LLC_SRAM */
+#endif /* __ASSEMBLY__ */
#endif /* CACHE_LLC_H */
diff --git a/plat/marvell/armada/common/marvell_common.mk b/plat/marvell/armada/common/marvell_common.mk
index f5f0c41..fcc97ac 100644
--- a/plat/marvell/armada/common/marvell_common.mk
+++ b/plat/marvell/armada/common/marvell_common.mk
@@ -16,8 +16,21 @@
# flag to switch from PLL to ARO
ARO_ENABLE := 0
$(eval $(call add_define,ARO_ENABLE))
+
+# Convert LLC to secure SRAM
+LLC_SRAM := 0
+$(eval $(call add_define,LLC_SRAM))
+
# Enable/Disable LLC
+ifeq (${LLC_SRAM}, 0)
LLC_ENABLE := 1
+else
+# When LLC_SRAM=1, the entire LLC converted to SRAM and enabled at BL1.
+# All existing cases activating LLC at BL31 stage should be disabled.
+# The below assignment does not allow changing the LLC_ENABLE
+# value in the command line.
+LLC_ENABLE = 0
+endif
$(eval $(call add_define,LLC_ENABLE))
include lib/xlat_tables_v2/xlat_tables.mk