diff options
| -rw-r--r-- | src/soc/intel/xeon_sp/cpx/romstage.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/soc/intel/xeon_sp/cpx/romstage.c b/src/soc/intel/xeon_sp/cpx/romstage.c index c1cb0caeea..ad794c3b6f 100644 --- a/src/soc/intel/xeon_sp/cpx/romstage.c +++ b/src/soc/intel/xeon_sp/cpx/romstage.c @@ -8,14 +8,32 @@ #include <fsp/util.h> #include <hob_iiouds.h> #include <hob_memmap.h> +#include <pc80/mc146818rtc.h> #include <soc/ddr.h> #include <soc/romstage.h> #include <soc/pci_devs.h> #include <soc/intel/common/smbios.h> +#include <stdbool.h> #include <string.h> #include "chip.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 + void __weak mainboard_memory_init_params(FSPM_UPD *mupd) { /* Default weak implementation */ @@ -124,6 +142,16 @@ void save_dimm_info(void) printk(BIOS_DEBUG, "%d DIMMs found\n", mem_info->dimm_cnt); } +static 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); + } +} + void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version) { FSPM_CONFIG *m_cfg = &mupd->FspmConfig; @@ -190,4 +218,7 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version) m_cfg->isocEn = 0; mainboard_memory_init_params(mupd); + + /* Adjust the "cold boot required" flag in CMOS. */ + set_cmos_mrc_cold_boot_flag(!mupd->FspmArchUpd.NvsBufferPtr); } |