TF-A: Fix wrong register read for MPAM extension
This patch fixes wrong ID_AA64DFR0_EL1 register read instead of
ID_AA64PFR0_EL1 to detect support for MPAM extension.
It also implements get_mpam_version() function which returns
MPAM version as:
0x00: None Armv8.0 or later;
0x01: v0.1 Armv8.4 or later;
0x10: v1.0 Armv8.2 or later;
0x11: v1.1 Armv8.4 or later;
Change-Id: I31d776b1a1b60cb16e5e62296d70adb129d7b760
Reported-by: Matteo Zini <matteozini96@gmail.com>
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
diff --git a/include/arch/aarch64/arch_features.h b/include/arch/aarch64/arch_features.h
index 49d827d..321485a 100644
--- a/include/arch/aarch64/arch_features.h
+++ b/include/arch/aarch64/arch_features.h
@@ -64,4 +64,21 @@
ID_AA64MMFR1_EL1_TWED_MASK) == ID_AA64MMFR1_EL1_TWED_SUPPORTED);
}
+/*
+ * Return MPAM version:
+ *
+ * 0x00: None Armv8.0 or later
+ * 0x01: v0.1 Armv8.4 or later
+ * 0x10: v1.0 Armv8.2 or later
+ * 0x11: v1.1 Armv8.4 or later
+ *
+ */
+static inline unsigned int get_mpam_version(void)
+{
+ return (unsigned int)((((read_id_aa64pfr0_el1() >>
+ ID_AA64PFR0_MPAM_SHIFT) & ID_AA64PFR0_MPAM_MASK) << 4) |
+ ((read_id_aa64pfr1_el1() >>
+ ID_AA64PFR1_MPAM_FRAC_SHIFT) & ID_AA64PFR1_MPAM_FRAC_MASK));
+}
+
#endif /* ARCH_FEATURES_H */