feat(rmmd): add support for RMM Boot interface
This patch adds the infrastructure needed to pass boot arguments from
EL3 to RMM and allocates a shared buffer between both worlds that can
be used, among others, to pass a boot manifest to RMM. The buffer is
composed a single memory page be used by a later EL3 <-> RMM interface
by all CPUs.
The RMM boot manifest is not implemented by this patch.
In addition to that, this patch also enables support for RMM when
RESET_TO_BL31 is enabled.
Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I855cd4758ee3843eadd9fb482d70a6d18954d82a
diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index caab14e..47fbe76 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -79,6 +79,7 @@
* - SCP TZC DRAM: If present, DRAM reserved for SCP use
* - L1 GPT DRAM: Reserved for L1 GPT if RME is enabled
* - REALM DRAM: Reserved for Realm world if RME is enabled
+ * - TF-A <-> RMM SHARED: Area shared for communication between TF-A and RMM
* - AP TZC DRAM: The remaining TZC secured DRAM reserved for AP use
*
* RME enabled(64MB) RME not enabled(16MB)
@@ -87,11 +88,16 @@
* | AP TZC (~28MB) | | AP TZC (~14MB) |
* -------------------- -------------------
* | | | |
- * | REALM (32MB) | | EL3 TZC (2MB) |
- * -------------------- -------------------
- * | | | |
- * | EL3 TZC (3MB) | | SCP TZC |
- * -------------------- 0xFFFF_FFFF-------------------
+ * | REALM (RMM) | | EL3 TZC (2MB) |
+ * | (32MB - 4KB) | -------------------
+ * -------------------- | |
+ * | | | SCP TZC |
+ * | TF-A <-> RMM | 0xFFFF_FFFF-------------------
+ * | SHARED (4KB) |
+ * --------------------
+ * | |
+ * | EL3 TZC (3MB) |
+ * --------------------
* | L1 GPT + SCP TZC |
* | (~1MB) |
* 0xFFFF_FFFF --------------------
@@ -106,12 +112,17 @@
*/
#define ARM_EL3_TZC_DRAM1_SIZE UL(0x00300000) /* 3MB */
#define ARM_L1_GPT_SIZE UL(0x00100000) /* 1MB */
-#define ARM_REALM_SIZE UL(0x02000000) /* 32MB */
+
+/* 32MB - ARM_EL3_RMM_SHARED_SIZE */
+#define ARM_REALM_SIZE (UL(0x02000000) - \
+ ARM_EL3_RMM_SHARED_SIZE)
+#define ARM_EL3_RMM_SHARED_SIZE (PAGE_SIZE) /* 4KB */
#else
#define ARM_TZC_DRAM1_SIZE UL(0x01000000) /* 16MB */
#define ARM_EL3_TZC_DRAM1_SIZE UL(0x00200000) /* 2MB */
#define ARM_L1_GPT_SIZE UL(0)
#define ARM_REALM_SIZE UL(0)
+#define ARM_EL3_RMM_SHARED_SIZE UL(0)
#endif /* ENABLE_RME */
#define ARM_SCP_TZC_DRAM1_BASE (ARM_DRAM1_BASE + \
@@ -128,13 +139,20 @@
#define ARM_L1_GPT_END (ARM_L1_GPT_ADDR_BASE + \
ARM_L1_GPT_SIZE - 1U)
-#define ARM_REALM_BASE (ARM_DRAM1_BASE + \
- ARM_DRAM1_SIZE - \
- (ARM_SCP_TZC_DRAM1_SIZE + \
- ARM_EL3_TZC_DRAM1_SIZE + \
- ARM_REALM_SIZE + \
- ARM_L1_GPT_SIZE))
+#define ARM_REALM_BASE (ARM_EL3_RMM_SHARED_BASE - \
+ ARM_REALM_SIZE)
+
#define ARM_REALM_END (ARM_REALM_BASE + ARM_REALM_SIZE - 1U)
+
+#define ARM_EL3_RMM_SHARED_BASE (ARM_DRAM1_BASE + \
+ ARM_DRAM1_SIZE - \
+ (ARM_SCP_TZC_DRAM1_SIZE + \
+ ARM_L1_GPT_SIZE + \
+ ARM_EL3_RMM_SHARED_SIZE + \
+ ARM_EL3_TZC_DRAM1_SIZE))
+
+#define ARM_EL3_RMM_SHARED_END (ARM_EL3_RMM_SHARED_BASE + \
+ ARM_EL3_RMM_SHARED_SIZE - 1U)
#endif /* ENABLE_RME */
#define ARM_EL3_TZC_DRAM1_BASE (ARM_SCP_TZC_DRAM1_BASE - \
@@ -148,6 +166,7 @@
#define ARM_AP_TZC_DRAM1_SIZE (ARM_TZC_DRAM1_SIZE - \
(ARM_SCP_TZC_DRAM1_SIZE + \
ARM_EL3_TZC_DRAM1_SIZE + \
+ ARM_EL3_RMM_SHARED_SIZE + \
ARM_REALM_SIZE + \
ARM_L1_GPT_SIZE))
#define ARM_AP_TZC_DRAM1_END (ARM_AP_TZC_DRAM1_BASE + \
@@ -197,6 +216,7 @@
#define ARM_NS_DRAM1_BASE ARM_DRAM1_BASE
#define ARM_NS_DRAM1_SIZE (ARM_DRAM1_SIZE - \
ARM_TZC_DRAM1_SIZE)
+
#define ARM_NS_DRAM1_END (ARM_NS_DRAM1_BASE + \
ARM_NS_DRAM1_SIZE - 1U)
#ifdef PLAT_ARM_DRAM1_BASE
@@ -301,6 +321,12 @@
ARM_L1_GPT_SIZE, \
MT_MEMORY | MT_RW | EL3_PAS)
+#define ARM_MAP_EL3_RMM_SHARED_MEM \
+ MAP_REGION_FLAT( \
+ ARM_EL3_RMM_SHARED_BASE, \
+ ARM_EL3_RMM_SHARED_SIZE, \
+ MT_MEMORY | MT_RW | MT_REALM)
+
#endif /* ENABLE_RME */
/*
@@ -595,6 +621,8 @@
#if ENABLE_RME
#define RMM_BASE (ARM_REALM_BASE)
#define RMM_LIMIT (RMM_BASE + ARM_REALM_SIZE)
+#define RMM_SHARED_BASE (ARM_EL3_RMM_SHARED_BASE)
+#define RMM_SHARED_SIZE (ARM_EL3_RMM_SHARED_SIZE)
#endif
#if !defined(__aarch64__) || JUNO_AARCH32_EL3_RUNTIME