ARM platforms: Add support for MT bit in MPIDR
This patch modifies some of the functions in ARM platform layer to cater
for the case when multi-threading `MT` is set in MPIDR. A new build flag
`ARM_PLAT_MT` is added, and when enabled, the functions accessing MPIDR
now assume that the `MT` bit is set for the platform and access the bit
fields accordingly.
Also, a new API plat_arm_get_cpu_pe_count is added when `ARM_PLAT_MT` is
enabled, returning the PE count within the physical cpu corresponding to
`mpidr`.
Change-Id: I04ccf212ac3054a60882761f4087bae299af13cb
Signed-off-by: Summer Qin <summer.qin@arm.com>
diff --git a/include/lib/aarch32/arch.h b/include/lib/aarch32/arch.h
index 8525c7b..14212d5 100644
--- a/include/lib/aarch32/arch.h
+++ b/include/lib/aarch32/arch.h
@@ -46,6 +46,7 @@
/*******************************************************************************
* MPIDR macros
******************************************************************************/
+#define MPIDR_MT_MASK (1 << 24)
#define MPIDR_CPU_MASK MPIDR_AFFLVL_MASK
#define MPIDR_CLUSTER_MASK (MPIDR_AFFLVL_MASK << MPIDR_AFFINITY_BITS)
#define MPIDR_AFFINITY_BITS 8
diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h
index 5876ce8..a854e96 100644
--- a/include/lib/aarch64/arch.h
+++ b/include/lib/aarch64/arch.h
@@ -49,6 +49,7 @@
/*******************************************************************************
* MPIDR macros
******************************************************************************/
+#define MPIDR_MT_MASK (1 << 24)
#define MPIDR_CPU_MASK MPIDR_AFFLVL_MASK
#define MPIDR_CLUSTER_MASK MPIDR_AFFLVL_MASK << MPIDR_AFFINITY_BITS
#define MPIDR_AFFINITY_BITS 8
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index e878f9e..ccdfd41 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -203,6 +203,10 @@
void plat_arm_interconnect_enter_coherency(void);
void plat_arm_interconnect_exit_coherency(void);
+#if ARM_PLAT_MT
+unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr);
+#endif
+
#if LOAD_IMAGE_V2
/*
* This function is called after loading SCP_BL2 image and it is used to perform