1 files changed, 34 insertions, 0 deletions
diff --git a/src/include/cpu/x86/save_state.h b/src/include/cpu/x86/save_state.h
new file mode 100644
index 0000000000..d6fcf63d79
--- /dev/null
+++ b/src/include/cpu/x86/save_state.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __CPU_X86_SAVE_STATE_H__
+#define __CPU_X86_SAVE_STATE_H__
+
+#include <stdint.h>
+
+enum cpu_reg {
+	RAX,
+	RBX,
+	RCX,
+	RDX
+};
+
+#define SMM_REV_INVALID 0xffffffff
+
+struct smm_save_state_ops {
+	const uint32_t *revision_table;
+	/* Accessors for CPU registers in the SMM save state
+	   Returns -1 on failure, 0 on success */
+	int (*get_reg)(const enum cpu_reg reg, const int node, void *out, const uint8_t length);
+	int (*set_reg)(const enum cpu_reg reg, const int node, void *in, const uint8_t length);
+	/* Returns -1 on failure, the node on which the 'cmd' was send on success */
+	int (*apmc_node)(u8 cmd);
+};
+
+/* Return -1 on failure, otherwise returns which CPU node issued an APMC IO write */
+int get_apmc_node(u8 cmd);
+/* Return -1 on failure, 0 on succes.
+   Accessors for the SMM save state CPU registers RAX, RBX, RCX and RDX */
+int get_save_state_reg(const enum cpu_reg reg, const int node, void *out, const uint8_t length);
+int set_save_state_reg(const enum cpu_reg reg, const int node, void *in, const uint8_t length);
+
+#endif /* __CPU_X86_SAVE_STATE_H__ */