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