Juno: Reserve some DDR-DRAM for secure use
This patch configures the TrustZone Controller in Juno to split
the 2GB DDR-DRAM memory at 0x80000000 into Secure and Non-Secure
regions:
- Secure DDR-DRAM: top 16 MB, except for the last 2 MB which are
used by the SCP for DDR retraining
- Non-Secure DDR-DRAM: remaining DRAM starting at base address
Build option PLAT_TSP_LOCATION selects the location of the secure
payload (BL3-2):
- 'tsram' : Trusted SRAM (default option)
- 'dram' : Secure region in the DDR-DRAM (set by the TrustZone
controller)
The MMU memory map has been updated to give BL2 permission to load
BL3-2 into the DDR-DRAM secure region.
Fixes ARM-software/tf-issues#233
Change-Id: I6843fc32ef90aadd3ea6ac4c7f314f8ecbd5d07b
diff --git a/plat/juno/juno_def.h b/plat/juno/juno_def.h
index 15296ed..88e35b0 100644
--- a/plat/juno/juno_def.h
+++ b/plat/juno/juno_def.h
@@ -37,6 +37,9 @@
/*******************************************************************************
* Juno memory map related constants
******************************************************************************/
+#define PLAT_TRUSTED_SRAM_ID 0
+#define PLAT_DRAM_ID 1
+
#define MHU_SECURE_BASE 0x04000000
#define MHU_SECURE_SIZE 0x00001000
@@ -73,6 +76,26 @@
#define DRAM_BASE 0x80000000
#define DRAM_SIZE 0x80000000
+/*
+ * DRAM at 0x8000_0000 is divided in two regions:
+ * - Secure DRAM (default is the top 16MB except for the last 2MB, which are
+ * used by the SCP for DDR retraining)
+ * - Non-Secure DRAM (remaining DRAM starting at DRAM_BASE)
+ */
+
+#define DRAM_SCP_SIZE 0x00200000
+#define DRAM_SCP_BASE (DRAM_BASE + DRAM_SIZE - DRAM_SCP_SIZE)
+
+#define DRAM_SEC_SIZE 0x00E00000
+#define DRAM_SEC_BASE (DRAM_SCP_BASE - DRAM_SEC_SIZE)
+
+#define DRAM_NS_BASE DRAM_BASE
+#define DRAM_NS_SIZE (DRAM_SIZE - DRAM_SCP_SIZE - DRAM_SEC_SIZE)
+
+/* Second region of DRAM */
+#define DRAM2_BASE 0x880000000
+#define DRAM2_SIZE 0x180000000
+
/* Memory mapped Generic timer interfaces */
#define SYS_CNTCTL_BASE 0x2a430000
#define SYS_CNTREAD_BASE 0x2a800000