diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/alderlake/include/soc/romstage.h | 11 | ||||
| -rw-r--r-- | src/soc/intel/alderlake/romstage/romstage.c | 7 |
2 files changed, 17 insertions, 1 deletions
diff --git a/src/soc/intel/alderlake/include/soc/romstage.h b/src/soc/intel/alderlake/include/soc/romstage.h index 679d538b2d..574c9b7ae1 100644 --- a/src/soc/intel/alderlake/include/soc/romstage.h +++ b/src/soc/intel/alderlake/include/soc/romstage.h @@ -20,4 +20,15 @@ enum board_type { BOARD_TYPE_SERVER = 8 }; +/* + * Default implementation indicates that the mainboard does not expect another reset. + * Mainboards can override the default implementation to indicate whether they expect + * another reset eg. FW Sync for another component on the mainboard. Some silicon init + * code eg. disabling UFS, can use this hint to suppress any redundant resets that they + * trigger. If the mainboard does not expect another reset, then the silicon init code + * can trigger their required reset. + * + * Return: true when the mainboard expects another reset, false otherwise. + */ +bool mainboard_expects_another_reset(void); #endif /* _SOC_ROMSTAGE_H_ */ diff --git a/src/soc/intel/alderlake/romstage/romstage.c b/src/soc/intel/alderlake/romstage/romstage.c index ff600db7b0..2f50cd29dd 100644 --- a/src/soc/intel/alderlake/romstage/romstage.c +++ b/src/soc/intel/alderlake/romstage/romstage.c @@ -32,6 +32,11 @@ #define PCR_PSFX_T0_SHDW_PCIEN 0x1C #define PCR_PSFX_T0_SHDW_PCIEN_FUNDIS (1 << 8) +bool __weak mainboard_expects_another_reset(void) +{ + return false; +} + static void disable_ufs(void) { /* disable USF0 */ @@ -185,7 +190,7 @@ void mainboard_romstage_entry(void) (CONFIG(USE_UNIFIED_AP_FIRMWARE_FOR_UFS_AND_NON_UFS))) { printk(BIOS_INFO, "Disabling UFS controllers\n"); disable_ufs(); - if (ps->prev_sleep_state == ACPI_S5) { + if (ps->prev_sleep_state == ACPI_S5 && !mainboard_expects_another_reset()) { printk(BIOS_INFO, "Warm Reset after disabling UFS controllers\n"); system_reset(); } |