1 files changed, 37 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/psci.h b/arch/arm64/include/asm/psci.h
new file mode 100644
index 0000000..d7ce0f3
--- /dev/null
+++ b/arch/arm64/include/asm/psci.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_PSCI_H
+#define __ASM_PSCI_H
+
+#include <stdint.h>
+/*
+ * PSCI 0.2 handler at EL2, the Power State Coordination Interface
+ * per DEN 0022. the payload calls it through the conduit the dtb
+ * names, hvc here, the call traps to EL2 and this dispatches.
+ */
+
+/* standard function ids, DEN 0022 table 5-1 */
+#define PSCI_FN_VERSION		0x84000000
+#define PSCI_FN_CPU_OFF		0x84000002
+#define PSCI_FN_CPU_ON		0x84000003
+#define PSCI_FN_SYSTEM_OFF	0x84000008
+#define PSCI_FN_SYSTEM_RESET	0x84000009
+
+/* version 0.2, major 0 minor 2 */
+#define PSCI_VERSION_0_2	0x00000002
+
+/* error codes, DEN 0022 */
+#define PSCI_RET_SUCCESS		0
+#define PSCI_RET_NOT_SUPPORTED		-1
+#define PSCI_RET_INVALID_PARAMS		-2
+#define PSCI_RET_DENIED			-3
+#define PSCI_RET_ALREADY_ON		-4
+#define PSCI_RET_ON_PENDING		-5
+#define PSCI_RET_INTERNAL_FAIL		-6
+#define PSCI_RET_NOT_PRESENT		-7
+#define PSCI_RET_DISABLED		-8
+
+/* the asm HVC vector calls this with the caller's x0-x3 in place */
+uint64_t tb_psci_dispatch(uint64_t fn, uint64_t x1, uint64_t x2,
+			  uint64_t x3);
+
+#endif /* __ASM_PSCI_H */