CSS: Remove the constants MHU_SECURE_BASE/SIZE
For CSS based platforms, the constants MHU_SECURE_BASE and
MHU_SECURE_SIZE used to define the extents of the Trusted Mailboxes.
As such, they were misnamed because the mailboxes are completely
unrelated to the MHU hardware.
This patch removes the MHU_SECURE_BASE and MHU_SECURE_SIZE #defines.
The address of the Trusted Mailboxes is now relative to the base of
the Trusted SRAM.
This patch also introduces a new constant, SCP_COM_SHARED_MEM_BASE,
which is the address of the first memory region used for communication
between AP and SCP. This is used by the BOM and SCPI protocols.
Change-Id: Ib200f057b19816bf05e834d111271c3ea777291f
diff --git a/include/plat/arm/css/common/css_def.h b/include/plat/arm/css/common/css_def.h
index 12e7541..268438f 100644
--- a/include/plat/arm/css/common/css_def.h
+++ b/include/plat/arm/css/common/css_def.h
@@ -37,11 +37,9 @@
/*************************************************************************
* Definitions common to all ARM Compute SubSystems (CSS)
*************************************************************************/
-#define MHU_SECURE_BASE ARM_SHARED_RAM_BASE
-#define MHU_SECURE_SIZE ARM_SHARED_RAM_SIZE
#define MHU_PAYLOAD_CACHED 0
-#define TRUSTED_MAILBOXES_BASE MHU_SECURE_BASE
+#define TRUSTED_MAILBOXES_BASE ARM_TRUSTED_SRAM_BASE
#define TRUSTED_MAILBOX_SHIFT 4
#define NSROM_BASE 0x1f000000
@@ -80,6 +78,15 @@
#define PRIMARY_CPU_SHIFT 8
#define PRIMARY_CPU_BIT_WIDTH 4
+/*
+ * Base address of the first memory region used for communication between AP
+ * and SCP. Used by the BOM and SCPI protocols.
+ *
+ * Note that this is located at the same address as SCP_BOOT_CFG_ADDR, which
+ * means the SCP/AP configuration data gets overwritten when the AP initiates
+ * communication with the SCP.
+ */
+#define SCP_COM_SHARED_MEM_BASE (ARM_TRUSTED_SRAM_BASE + 0x80)
#define CSS_MAP_DEVICE MAP_REGION_FLAT( \
CSS_DEVICE_BASE, \