ARM: Factor out ARM on/off PSCI control functions

Split ARM on/off function from PSCI support code.

This will allow to reuse these functions in other code.

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/target-arm/arm-powerctl.h b/target-arm/arm-powerctl.h
new file mode 100644
index 0000000000..98ee04989b
--- /dev/null
+++ b/target-arm/arm-powerctl.h
@@ -0,0 +1,75 @@
+/*
+ * QEMU support -- ARM Power Control specific functions.
+ *
+ * Copyright (c) 2016 Jean-Christophe Dubois
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_ARM_POWERCTL_H
+#define QEMU_ARM_POWERCTL_H
+
+#include "kvm-consts.h"
+
+#define QEMU_ARM_POWERCTL_RET_SUCCESS QEMU_PSCI_RET_SUCCESS
+#define QEMU_ARM_POWERCTL_INVALID_PARAM QEMU_PSCI_RET_INVALID_PARAMS
+#define QEMU_ARM_POWERCTL_ALREADY_ON QEMU_PSCI_RET_ALREADY_ON
+#define QEMU_ARM_POWERCTL_IS_OFF QEMU_PSCI_RET_DENIED
+
+/*
+ * arm_get_cpu_by_id:
+ * @cpuid: the id of the CPU we want to retrieve the state
+ *
+ * Retrieve a CPUState object from its CPU ID provided in @cpuid.
+ *
+ * Returns: a pointer to the CPUState structure of the requested CPU.
+ */
+CPUState *arm_get_cpu_by_id(uint64_t cpuid);
+
+/*
+ * arm_set_cpu_on:
+ * @cpuid: the id of the CPU we want to start/wake up.
+ * @entry: the address the CPU shall start from.
+ * @context_id: the value to put in r0/x0.
+ * @target_el: The desired exception level.
+ * @target_aa64: 1 if the requested mode is AArch64. 0 otherwise.
+ *
+ * Start the cpu designated by @cpuid in @target_el exception level. The mode
+ * shall be AArch64 if @target_aa64 is set to 1. Otherwise the mode is
+ * AArch32. The CPU shall start at @entry with @context_id in r0/x0.
+ *
+ * Returns: QEMU_ARM_POWERCTL_RET_SUCCESS on success.
+ * QEMU_ARM_POWERCTL_INVALID_PARAM if bad parameters are provided.
+ * QEMU_ARM_POWERCTL_ALREADY_ON if the CPU was already started.
+ */
+int arm_set_cpu_on(uint64_t cpuid, uint64_t entry, uint64_t context_id,
+                   uint32_t target_el, bool target_aa64);
+
+/*
+ * arm_set_cpu_off:
+ * @cpuid: the id of the CPU we want to stop/shut down.
+ *
+ * Stop the cpu designated by @cpuid.
+ *
+ * Returns: QEMU_ARM_POWERCTL_RET_SUCCESS on success.
+ * QEMU_ARM_POWERCTL_INVALID_PARAM if bad parameters are provided.
+ * QEMU_ARM_POWERCTL_IS_OFF if CPU is already off
+ */
+
+int arm_set_cpu_off(uint64_t cpuid);
+
+/*
+ * arm_reset_cpu:
+ * @cpuid: the id of the CPU we want to reset.
+ *
+ * Reset the cpu designated by @cpuid.
+ *
+ * Returns: QEMU_ARM_POWERCTL_RET_SUCCESS on success.
+ * QEMU_ARM_POWERCTL_INVALID_PARAM if bad parameters are provided.
+ * QEMU_ARM_POWERCTL_IS_OFF if CPU is off
+ */
+int arm_reset_cpu(uint64_t cpuid);
+
+#endif