src/include/cpu/x86/save_state.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef __CPU_X86_SAVE_STATE_H__
   4 #define __CPU_X86_SAVE_STATE_H__
   5
   6 #include <stdint.h>
   7
   8 enum cpu_reg {
   9         RAX,
  10         RBX,
  11         RCX,
  12         RDX
  13 };
  14
  15 #define SMM_REV_INVALID 0xffffffff
  16
  17 struct smm_save_state_ops {
  18         const uint32_t *revision_table;
  19         /* Accessors for CPU registers in the SMM save state
  20            Returns -1 on failure, 0 on success */
  21         int (*get_reg)(const enum cpu_reg reg, const int node, void *out, const uint8_t length);
  22         int (*set_reg)(const enum cpu_reg reg, const int node, void *in, const uint8_t length);
  23         /* Returns -1 on failure, the node on which the 'cmd' was send on success */
  24         int (*apmc_node)(u8 cmd);
  25 };
  26
  27 /* Return -1 on failure, otherwise returns which CPU node issued an APMC IO write */
  28 int get_apmc_node(u8 cmd);
  29 /* Return -1 on failure, 0 on success.
  30    Accessors for the SMM save state CPU registers RAX, RBX, RCX and RDX */
  31 int get_save_state_reg(const enum cpu_reg reg, const int node, void *out, const uint8_t length);
  32 int set_save_state_reg(const enum cpu_reg reg, const int node, void *in, const uint8_t length);
  33
  34 #endif /* __CPU_X86_SAVE_STATE_H__ */