NVRAM SDRAM 参数的定义

MidN***

sdram_init 定义

[7:6] RowWidth Row width in use.
00: 11-bit row
01: 12-bit row
10: 12-bit row
11: 14-bit row

#define MEMC_11BIT_ROW          (0<<6)
#define MEMC_12BIT_ROW          (1<<6)
#define MEMC_13BIT_ROW          (2<<6)
#define MEMC_14BIT_ROW          (3<<6)

[4:3] ColWidth Column width in use.
00: 8-bit column
01: 9-bit column
10: 10-bit column
11: 11-bit column

#define MEMC_8BIT_COL           (0<<3)
#define MEMC_9BIT_COL           (1<<3)
#define MEMC_10BIT_COL          (2<<3)
#define MEMC_11BIT_COL          (3<<3)

[2] Memory self priority.

#define MEMC_SELPRIORITY        (1<<2)

[1] 16BitMem Memory interface.
0: 32-bit interface
1: 16-bit interface

#define MEMC_32BIT_BUS          (0<<1)
#define MEMC_16BIT_BUS          (1<<1)

[0] MemType Memory type in use.
0: SDR SDRAM
1: DDR SDRAM

#define MEMC_MEMTYPE_SDR        (0<<0)
#define MEMC_MEMTYPE_DDR        (1<<0)