amdpmc_send_msg
int amdpmc_send_msg(struct amdpmc_softc *, uint8_t, uint32_t, uint32_t *);
error = amdpmc_send_msg(sc, SMU_MSG_GETVERSION, 0, &version);
error = amdpmc_send_msg(sc, SMU_MSG_GET_SUP_CONSTRAINTS, 0,
error = amdpmc_send_msg(sc, SMU_MSG_LOG_GETDRAM_ADDR_LO, 0, &addr_lo);
error = amdpmc_send_msg(sc, SMU_MSG_LOG_GETDRAM_ADDR_HI, 0, &addr_hi);
error = amdpmc_send_msg(sc, SMU_MSG_LOG_RESET, 0, NULL);
error = amdpmc_send_msg(sc, SMU_MSG_LOG_START, 0, NULL);
error = amdpmc_send_msg(sc, SMU_MSG_LOG_DUMP_DATA, 0, NULL);
amdpmc_send_msg(sc, SMU_MSG_LOG_RESET, 0, NULL);
amdpmc_send_msg(sc, SMU_MSG_LOG_START, 0, NULL);
amdpmc_send_msg(sc, SMU_MSG_OS_HINT, 1, NULL);
amdpmc_send_msg(sc, SMU_MSG_OS_HINT, 0, NULL);