arm: implement generic PSCI reset call for armv8

Add a psci_system_reset() which calls the SYSTEM_RESET function of
PSCI 0.2 and can be used by boards that support it to implement
reset_cpu().

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 16 insertions, 1 deletions

diff --git a/arch/arm/include/asm/psci.h b/arch/arm/include/asm/psci.h
index 128a606444..3704f077b0 100644
--- a/arch/arm/include/asm/psci.h
+++ b/arch/arm/include/asm/psci.h
@@ -18,7 +18,7 @@
 #ifndef __ARM_PSCI_H__
 #define __ARM_PSCI_H__
 
-/* PSCI interface */
+/* PSCI 0.1 interface */
 #define ARM_PSCI_FN_BASE		0x95c1ba5e
 #define ARM_PSCI_FN(n)			(ARM_PSCI_FN_BASE + (n))
 
@@ -32,6 +32,21 @@
 #define ARM_PSCI_RET_INVAL		(-2)
 #define ARM_PSCI_RET_DENIED		(-3)
 
+/* PSCI 0.2 interface */
+#define ARM_PSCI_0_2_FN_BASE			0x84000000
+#define ARM_PSCI_0_2_FN(n)			(ARM_PSCI_0_2_FN_BASE + (n))
+
+#define ARM_PSCI_0_2_FN_PSCI_VERSION		ARM_PSCI_0_2_FN(0)
+#define ARM_PSCI_0_2_FN_CPU_SUSPEND		ARM_PSCI_0_2_FN(1)
+#define ARM_PSCI_0_2_FN_CPU_OFF			ARM_PSCI_0_2_FN(2)
+#define ARM_PSCI_0_2_FN_CPU_ON			ARM_PSCI_0_2_FN(3)
+#define ARM_PSCI_0_2_FN_AFFINITY_INFO		ARM_PSCI_0_2_FN(4)
+#define ARM_PSCI_0_2_FN_MIGRATE			ARM_PSCI_0_2_FN(5)
+#define ARM_PSCI_0_2_FN_MIGRATE_INFO_TYPE	ARM_PSCI_0_2_FN(6)
+#define ARM_PSCI_0_2_FN_MIGRATE_INFO_UP_CPU	ARM_PSCI_0_2_FN(7)
+#define ARM_PSCI_0_2_FN_SYSTEM_OFF		ARM_PSCI_0_2_FN(8)
+#define ARM_PSCI_0_2_FN_SYSTEM_RESET		ARM_PSCI_0_2_FN(9)
+
 #ifndef __ASSEMBLY__
 int psci_update_dt(void *fdt);
 void psci_board_init(void);