feat(fvp_r): configure system registers to boot rich OS
Following system registers are modified before exiting EL2 to allow
u-boot/Linux to boot
1. CNTHCTL_EL2.EL1PCTEN -> 1
Allows U-boot to use physical counters at EL1
2. VTCR_EL2.MSA -> 1
Enables VMSA at EL1, which is required by U-Boot and Linux.
3. HCR_EL2.APK = 1 & HCR_EL2.API = 1
Disables PAuth instruction and register traps in EL1
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I58f45b6669a9ad1debb80265b243015c054a9bb1
diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index 1b3ae02..8333902 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -576,6 +576,10 @@
#define CPTR_EL2_TZ_BIT (U(1) << 8)
#define CPTR_EL2_RESET_VAL CPTR_EL2_RES1
+/* VTCR_EL2 definitions */
+#define VTCR_RESET_VAL U(0x0)
+#define VTCR_EL2_MSA (U(1) << 31)
+
/* CPSR/SPSR definitions */
#define DAIF_FIQ_BIT (U(1) << 0)
#define DAIF_IRQ_BIT (U(1) << 1)