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/* SPDX-License-Identifier: GPL-2.0-only */
#include <commonlib/bsd/helpers.h>
#include <cpu/x86/save_state.h>
#include <cpu/x86/smm.h>
#include <types.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);
}
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