feat(pmu): introduce pmuv3 lib/extensions folder
The enablement code for the PMU is scattered and difficult to track
down. Factor out the feature into its own lib/extensions folder and
consolidate the implementation. Treat it is as an architecturally
mandatory feature as it is currently.
Additionally, do some cleanup on AArch64. Setting overflow bits in
PMCR_EL0 is irrelevant for firmware so don't do it. Then delay the PMU
initialisation until the context management stage which simplifies the
early environment assembly. One side effect is that the PMU might count
before this happens so reset all counters to 0 to prevent any leakage.
Finally, add an enable to manage_extensions_realm() as realm world uses
the pmu. This introduces the HPMN fixup to realm world.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Ie13a8625820ecc5fbfa467dc6ca18025bf6a9cd3
diff --git a/include/arch/aarch32/arch.h b/include/arch/aarch32/arch.h
index c8a6334..979e43a 100644
--- a/include/arch/aarch32/arch.h
+++ b/include/arch/aarch32/arch.h
@@ -104,7 +104,11 @@
/* CSSELR definitions */
#define LEVEL_SHIFT U(1)
-/* ID_DFR0_EL1 definitions */
+/* ID_DFR0 definitions */
+#define ID_DFR0_PERFMON_SHIFT U(24)
+#define ID_DFR0_PERFMON_MASK U(0xf)
+#define ID_DFR0_PERFMON_PMUV3 U(3)
+#define ID_DFR0_PERFMON_PMUV3P5 U(6)
#define ID_DFR0_COPTRC_SHIFT U(12)
#define ID_DFR0_COPTRC_MASK U(0xf)
#define ID_DFR0_COPTRC_SUPPORTED U(1)
@@ -464,6 +468,10 @@
#define PMCR_LP_BIT (U(1) << 7)
#define PMCR_LC_BIT (U(1) << 6)
#define PMCR_DP_BIT (U(1) << 5)
+#define PMCR_X_BIT (U(1) << 4)
+#define PMCR_C_BIT (U(1) << 2)
+#define PMCR_P_BIT (U(1) << 1)
+#define PMCR_E_BIT (U(1) << 0)
#define PMCR_RESET_VAL U(0x0)
/*******************************************************************************