summaryrefslogtreecommitdiffstats
path: root/arch/riscv/include/asm/suspend.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/riscv/include/asm/suspend.h')
-rw-r--r--arch/riscv/include/asm/suspend.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/suspend.h b/arch/riscv/include/asm/suspend.h
new file mode 100644
index 000000000..8be391c2a
--- /dev/null
+++ b/arch/riscv/include/asm/suspend.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2021 Western Digital Corporation or its affiliates.
+ * Copyright (c) 2022 Ventana Micro Systems Inc.
+ */
+
+#ifndef _ASM_RISCV_SUSPEND_H
+#define _ASM_RISCV_SUSPEND_H
+
+#include <asm/ptrace.h>
+
+struct suspend_context {
+ /* Saved and restored by low-level functions */
+ struct pt_regs regs;
+ /* Saved and restored by high-level functions */
+ unsigned long scratch;
+ unsigned long tvec;
+ unsigned long ie;
+#ifdef CONFIG_MMU
+ unsigned long satp;
+#endif
+};
+
+/* Low-level CPU suspend entry function */
+int __cpu_suspend_enter(struct suspend_context *context);
+
+/* High-level CPU suspend which will save context and call finish() */
+int cpu_suspend(unsigned long arg,
+ int (*finish)(unsigned long arg,
+ unsigned long entry,
+ unsigned long context));
+
+/* Low-level CPU resume entry function */
+int __cpu_resume_enter(unsigned long hartid, unsigned long context);
+
+#endif