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.

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