diff options
Diffstat (limited to 'include/configs')
| -rw-r--r-- | include/configs/sbc8548.h | 42 |
1 files changed, 38 insertions, 4 deletions
diff --git a/include/configs/sbc8548.h b/include/configs/sbc8548.h index 5c1411f..009931d 100644 --- a/include/configs/sbc8548.h +++ b/include/configs/sbc8548.h @@ -197,13 +197,13 @@ #define CONFIG_SYS_EEPROM_BASE 0xf8b00000 /* - * SDRAM on the Local Bus + * SDRAM on the Local Bus (CS3 and CS4) */ #define CONFIG_SYS_LBC_SDRAM_BASE 0xf0000000 /* Localbus SDRAM */ -#define CONFIG_SYS_LBC_SDRAM_SIZE 64 /* LBC SDRAM is 64MB */ +#define CONFIG_SYS_LBC_SDRAM_SIZE 128 /* LBC SDRAM is 128MB */ /* - * Base Register 3 and Option Register 3 configure SDRAM. + * Base Register 3 and Option Register 3 configure the 1st 1/2 SDRAM. * The SDRAM base address, CONFIG_SYS_LBC_SDRAM_BASE, is 0xf0000000. * * For BR3, need: @@ -221,7 +221,7 @@ #define CONFIG_SYS_BR3_PRELIM 0xf0001861 /* - * The SDRAM size in MB, CONFIG_SYS_LBC_SDRAM_SIZE, is 64. + * The SDRAM size in MB, of 1/2 CONFIG_SYS_LBC_SDRAM_SIZE, is 64. * * For OR3, need: * 64MB mask for AM, OR3[0:7] = 1111 1100 @@ -236,6 +236,40 @@ #define CONFIG_SYS_OR3_PRELIM 0xfc006cc0 +/* + * Base Register 4 and Option Register 4 configure the 2nd 1/2 SDRAM. + * The base address, (SDRAM_BASE + 1/2*SIZE), is 0xf4000000. + * + * For BR4, need: + * Base address of 0xf4000000 = BR[0:16] = 1111 0100 0000 0000 0 + * port-size = 32-bits = BR2[19:20] = 11 + * no parity checking = BR2[21:22] = 00 + * SDRAM for MSEL = BR2[24:26] = 011 + * Valid = BR[31] = 1 + * + * 0 4 8 12 16 20 24 28 + * 1111 0000 0000 0000 0001 1000 0110 0001 = f4001861 + * + */ + +#define CONFIG_SYS_BR4_PRELIM 0xf4001861 + +/* + * The SDRAM size in MB, of 1/2 CONFIG_SYS_LBC_SDRAM_SIZE, is 64. + * + * For OR4, need: + * 64MB mask for AM, OR3[0:7] = 1111 1100 + * XAM, OR3[17:18] = 11 + * 10 columns OR3[19-21] = 011 + * 12 rows OR3[23-25] = 011 + * EAD set for extra time OR[31] = 0 + * + * 0 4 8 12 16 20 24 28 + * 1111 1100 0000 0000 0110 1100 1100 0000 = fc006cc0 + */ + +#define CONFIG_SYS_OR4_PRELIM 0xfc006cc0 + #define CONFIG_SYS_LBC_LCRR 0x00000002 /* LB clock ratio reg */ #define CONFIG_SYS_LBC_LBCR 0x00000000 /* LB config reg */ #define CONFIG_SYS_LBC_LSRT 0x20000000 /* LB sdram refresh timer */ |