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Diffstat (limited to 'cpu/ppc4xx/sdram.h')
| -rw-r--r-- | cpu/ppc4xx/sdram.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/cpu/ppc4xx/sdram.h b/cpu/ppc4xx/sdram.h new file mode 100644 index 0000000..62b5442 --- /dev/null +++ b/cpu/ppc4xx/sdram.h @@ -0,0 +1,78 @@ +/* + * (C) Copyright 2006 + * Stefan Roese, DENX Software Engineering, sr@denx.de. + * + * (C) Copyright 2006 + * DAVE Srl <www.dave-tech.it> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _SDRAM_H_ +#define _SDRAM_H_ + +#include <config.h> + +#define mtsdram0(reg, data) mtdcr(memcfga,reg);mtdcr(memcfgd,data) + +#define ONE_BILLION 1000000000 + +struct sdram_conf_s { + unsigned long size; + int rows; + unsigned long reg; +}; + +typedef struct sdram_conf_s sdram_conf_t; + +/* Bitfields offsets */ +#define SDRAM0_TR_CASL (31 - 8) +#define SDRAM0_TR_PTA (31 - 13) +#define SDRAM0_TR_CTP (31 - 15) +#define SDRAM0_TR_LDF (31 - 17) +#define SDRAM0_TR_RFTA (31 - 29) +#define SDRAM0_TR_RCD (31 - 31) + +#ifdef CFG_SDRAM_CL +/* SDRAM timings [ns] according to AMCC/IBM names (see SDRAM_faq.doc) */ +#define CFG_SDRAM_CASL CFG_SDRAM_CL +#define CFG_SDRAM_PTA CFG_SDRAM_tRP +#define CFG_SDRAM_CTP (CFG_SDRAM_tRC - CFG_SDRAM_tRCD - CFG_SDRAM_tRP) +#define CFG_SDRAM_LDF 0 +#ifdef CFG_SDRAM_tRFC +#define CFG_SDRAM_RFTA CFG_SDRAM_tRFC +#else +#define CFG_SDRAM_RFTA CFG_SDRAM_tRC +#endif +#define CFG_SDRAM_RCD CFG_SDRAM_tRCD +#endif /* #ifdef CFG_SDRAM_CL */ + +/* + * Some defines for the 440 DDR controller + */ +#define SDRAM_CFG0_DC_EN 0x80000000 /* SDRAM Controller Enable */ +#define SDRAM_CFG0_MEMCHK 0x30000000 /* Memory data error checking mask*/ +#define SDRAM_CFG0_MEMCHK_NON 0x00000000 /* No ECC generation */ +#define SDRAM_CFG0_MEMCHK_GEN 0x20000000 /* ECC generation */ +#define SDRAM_CFG0_MEMCHK_CHK 0x30000000 /* ECC generation and checking */ +#define SDRAM_CFG0_DRAMWDTH 0x02000000 /* DRAM width mask */ +#define SDRAM_CFG0_DRAMWDTH_32 0x00000000 /* 32 bits */ +#define SDRAM_CFG0_DRAMWDTH_64 0x02000000 /* 64 bits */ + +#endif |