diff options
Diffstat (limited to 'include/configs/MPC8349EMDS.h')
| -rw-r--r-- | include/configs/MPC8349EMDS.h | 47 |
1 files changed, 33 insertions, 14 deletions
diff --git a/include/configs/MPC8349EMDS.h b/include/configs/MPC8349EMDS.h index c2bd0f5..39e3d95 100644 --- a/include/configs/MPC8349EMDS.h +++ b/include/configs/MPC8349EMDS.h @@ -73,27 +73,46 @@ #define CONFIG_DDR_ECC_CMD /* use DDR ECC user commands */ #define CONFIG_SPD_EEPROM /* use SPD EEPROM for DDR setup*/ +/* + * 32-bit data path mode. + * + * Please note that using this mode for devices with the real density of 64-bit + * effectively reduces the amount of available memory due to the effect of + * wrapping around while translating address to row/columns, for example in the + * 256MB module the upper 128MB get aliased with contents of the lower + * 128MB); normally this define should be used for devices with real 32-bit + * data path. + */ +#undef CONFIG_DDR_32BIT + #define CFG_DDR_BASE 0x00000000 /* DDR is system memory*/ #define CFG_SDRAM_BASE CFG_DDR_BASE #define CFG_DDR_SDRAM_BASE CFG_DDR_BASE #undef CONFIG_DDR_2T_TIMING #if defined(CONFIG_SPD_EEPROM) - /* - * Determine DDR configuration from I2C interface. - */ - #define SPD_EEPROM_ADDRESS 0x51 /* DDR DIMM */ +/* + * Determine DDR configuration from I2C interface. + */ +#define SPD_EEPROM_ADDRESS 0x51 /* DDR DIMM */ #else - /* - * Manually set up DDR parameters - */ - #define CFG_DDR_SIZE 128 /* Mb */ - #define CFG_DDR_CONFIG (CSCONFIG_EN | CSCONFIG_ROW_BIT_13 | CSCONFIG_COL_BIT_9) - #define CFG_DDR_TIMING_1 0x37344321 - #define CFG_DDR_TIMING_2 0x00000800 /* P9-45,may need tuning */ - #define CFG_DDR_CONTROL 0xc2000000 /* unbuffered,no DYN_PWR */ - #define CFG_DDR_MODE 0x00000062 /* DLL,normal,seq,4/2.5 */ - #define CFG_DDR_INTERVAL 0x05200100 /* autocharge,no open page */ +/* + * Manually set up DDR parameters + */ +#define CFG_DDR_SIZE 256 /* MB */ +#define CFG_DDR_CONFIG (CSCONFIG_EN | CSCONFIG_ROW_BIT_13 | CSCONFIG_COL_BIT_10) +#define CFG_DDR_TIMING_1 0x36332321 +#define CFG_DDR_TIMING_2 0x00000800 /* P9-45,may need tuning */ +#define CFG_DDR_CONTROL 0xc2000000 /* unbuffered,no DYN_PWR */ +#define CFG_DDR_INTERVAL 0x04060100 /* autocharge,no open page */ + +#if defined(CONFIG_DDR_32BIT) +/* set burst length to 8 for 32-bit data path */ +#define CFG_DDR_MODE 0x00000023 /* DLL,normal,seq,4/2.5, 8 burst len */ +#else +/* the default burst length is 4 - for 64-bit data path */ +#define CFG_DDR_MODE 0x00000022 /* DLL,normal,seq,4/2.5, 4 burst len */ +#endif #endif /* |