diff options
Diffstat (limited to 'src/cpu/x86/smm/save_state.c')
-rw-r--r-- | src/cpu/x86/smm/save_state.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/cpu/x86/smm/save_state.c b/src/cpu/x86/smm/save_state.c new file mode 100644 index 0000000000..bb08f86414 --- /dev/null +++ b/src/cpu/x86/smm/save_state.c @@ -0,0 +1,77 @@ +/* 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); +} |