| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <cpu/x86/smm.h> |
| #include <cpu/x86/save_state.h> |
| |
| /* These are weakly linked such that platforms can link only the save state |
| ops they actually require. */ |
| const struct smm_save_state_ops *legacy_ops __weak = NULL; |
| const struct smm_save_state_ops *em64t100_ops __weak = NULL; |
| const struct smm_save_state_ops *em64t101_ops __weak = NULL; |
| const struct smm_save_state_ops *amd64_ops __weak = NULL; |
| |
| static const struct smm_save_state_ops *save_state; |
| |
| /* Returns -1 on failure, 0 on success */ |
| static int init_save_state(void) |
| { |
| const uint32_t revision = smm_revision(); |
| int i; |
| static bool initialized = false; |
| const struct smm_save_state_ops *save_state_ops[] = { |
| legacy_ops, |
| em64t100_ops, |
| em64t101_ops, |
| amd64_ops, |
| }; |
| |
| if (initialized) |
| return 0; |
| |
| for (i = 0; i < ARRAY_SIZE(save_state_ops); i++) { |
| const struct smm_save_state_ops *ops = save_state_ops[i]; |
| const uint32_t *rev; |
| |
| if (ops == NULL) |
| continue; |
| |
| for (rev = ops->revision_table; *rev != SMM_REV_INVALID; rev++) |
| if (*rev == revision) { |
| save_state = ops; |
| initialized = true; |
| return 0; |
| } |
| } |
| |
| return -1; |
| } |
| |
| int get_apmc_node(u8 cmd) |
| { |
| if (init_save_state()) |
| return -1; |
| |
| return save_state->apmc_node(cmd); |
| } |
| |
| int get_save_state_reg(const enum cpu_reg reg, const int node, void *out, const uint8_t length) |
| { |
| if (init_save_state()) |
| return -1; |
| |
| if (node > CONFIG_MAX_CPUS) |
| return -1; |
| |
| return save_state->get_reg(reg, node, out, length); |
| } |
| |
| int set_save_state_reg(const enum cpu_reg reg, const int node, void *in, const uint8_t length) |
| { |
| if (init_save_state()) |
| return -1; |
| |
| if (node > CONFIG_MAX_CPUS) |
| return -1; |
| |
| return save_state->set_reg(reg, node, in, length); |
| } |