diff options
Diffstat (limited to 'src/soc/amd/common/block/psp/psp_smm.c')
| -rw-r--r-- | src/soc/amd/common/block/psp/psp_smm.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/psp/psp_smm.c b/src/soc/amd/common/block/psp/psp_smm.c index cc15738881..4ae2277cab 100644 --- a/src/soc/amd/common/block/psp/psp_smm.c +++ b/src/soc/amd/common/block/psp/psp_smm.c @@ -76,3 +76,31 @@ int psp_notify_smm(void) return cmd_status; } + +/* Notify PSP the system is going to a sleep state. */ +void psp_notify_sx_info(u8 sleep_type) +{ + int cmd_status; + struct mbox_cmd_sx_info_buffer *buffer; + + /* PSP verifies that this buffer is at the address specified in psp_notify_smm() */ + buffer = (struct mbox_cmd_sx_info_buffer *)c2p_buffer.buffer; + memset(buffer, 0, sizeof(*buffer)); + buffer->header.size = sizeof(*buffer); + + if (sleep_type > MBOX_BIOS_CMD_SX_INFO_SLEEP_TYPE_MAX) { + printk(BIOS_ERR, "PSP: BUG: invalid sleep type 0x%x requested\n", sleep_type); + return; + } + + printk(BIOS_DEBUG, "PSP: Prepare to enter sleep state %d... ", sleep_type); + + buffer->sleep_type = sleep_type; + + set_smm_flag(); + cmd_status = send_psp_command(MBOX_BIOS_CMD_SX_INFO, buffer); + clear_smm_flag(); + + /* buffer's status shouldn't change but report it if it does */ + psp_print_cmd_status(cmd_status, (struct mbox_default_buffer *)buffer); +} |