Dear Sir.

My own product must need a change the value(config) of sdram. Such as size, speed, and etc.

So, I'm try to search and study the coreboot source code, and found out the "vendorcode/intel/fsp1_0/rangeley/include/fspplatform.h"

This header are contained the some structure for setup the sdram. such as "MEM_DOWN_DIMM_SPD_DATA;"

50 typedef struct {
51   UINT8 DRAMDeviceType;                 // 2   DRAM Device Type
52   UINT8 ModuleType;                     // 3   Module Type
53   UINT8 SDRAMDensityAndBanks;           // 4   SDRAM Density and Banks
54   UINT8 SDRAMAddressing;                // 5   SDRAM Addressing
55   UINT8 VDD;                            // 6   Module Nominal Voltage
56   UINT8 ModuleOrganization;             // 7   Module Organization
57   UINT8 ModuleMemoryBusWidth;

94 UINT8 DramManufacturerIdLsb; // 148 DRAM Manufacturer ID Code, LSB
95 UINT8 DramManufacturerIdMsb; // 149 DRAM Manufacturer ID Code, MSB
96 } MEM_DOWN_DIMM_SPD_DATA;

So, I'm try to found *.c source codes for check configuration point.

But, coreboot are not setup the argument of sdram.

I don't understand this sisution, Because sdram is must need a some configuration for use.

Why? do not setup the argument of sdram ???

Please advise to me.

Thank you.