diff options
| -rw-r--r-- | src/soc/intel/xeon_sp/spr/include/soc/soc_util.h | 17 | ||||
| -rw-r--r-- | src/soc/intel/xeon_sp/spr/soc_util.c | 12 |
2 files changed, 28 insertions, 1 deletions
diff --git a/src/soc/intel/xeon_sp/spr/include/soc/soc_util.h b/src/soc/intel/xeon_sp/spr/include/soc/soc_util.h index c96103059a..e1ed41458b 100644 --- a/src/soc/intel/xeon_sp/spr/include/soc/soc_util.h +++ b/src/soc/intel/xeon_sp/spr/include/soc/soc_util.h @@ -9,6 +9,22 @@ #include <hob_systeminfo.h> #include <hob_enhancedwarningloglib.h> +/* + * Address of the MRC status byte in CMOS. Should be reserved + * in mainboards' cmos.layout and not covered by checksum. + */ +#define CMOS_OFFSET_MRC_STATUS 0x47 + +#if CONFIG(USE_OPTION_TABLE) +#include "option_table.h" +#if CMOS_VSTART_mrc_status != CMOS_OFFSET_MRC_STATUS * 8 +#error "CMOS start for CPX-SP MRC status byte is not correct, check your cmos.layout" +#endif +#if CMOS_VLEN_mrc_status != 8 +#error "CMOS length for CPX-SP MRC status byte is not correct, check your cmos.layout" +#endif +#endif + const struct SystemMemoryMapHob *get_system_memory_map(void); const struct SystemMemoryMapElement *get_system_memory_map_elment(uint8_t *num); @@ -28,5 +44,6 @@ const EWL_PRIVATE_DATA *get_ewl_hob(void); uint32_t get_ubox_busno(uint32_t socket, uint8_t offset); uint32_t get_socket_ubox_busno(uint32_t socket); +void set_cmos_mrc_cold_boot_flag(bool cold_boot_required); #endif /* _SOC_UTIL_H_ */ diff --git a/src/soc/intel/xeon_sp/spr/soc_util.c b/src/soc/intel/xeon_sp/spr/soc_util.c index f8d40e3bea..94d172c37a 100644 --- a/src/soc/intel/xeon_sp/spr/soc_util.c +++ b/src/soc/intel/xeon_sp/spr/soc_util.c @@ -5,7 +5,6 @@ #include <device/pci.h> #include <hob_cxlnode.h> #include <intelblocks/cpulib.h> -#include <soc/cpu.h> #include <soc/msr.h> #include <soc/numa.h> #include <soc/pci_devs.h> @@ -13,6 +12,7 @@ #include <soc/util.h> #include <stdlib.h> #include <string.h> +#include <pc80/mc146818rtc.h> const EWL_PRIVATE_DATA *get_ewl_hob(void) { @@ -161,3 +161,13 @@ void bios_done_msr(void *unused) wrmsr(MSR_BIOS_DONE, msr); } } + +void set_cmos_mrc_cold_boot_flag(bool cold_boot_required) +{ + uint8_t mrc_status = cmos_read(CMOS_OFFSET_MRC_STATUS); + uint8_t new_mrc_status = (mrc_status & 0xfe) | cold_boot_required; + printk(BIOS_SPEW, "MRC status: 0x%02x want 0x%02x\n", mrc_status, new_mrc_status); + if (new_mrc_status != mrc_status) + cmos_write(new_mrc_status, CMOS_OFFSET_MRC_STATUS); + +} |