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Diffstat (limited to 'board/mbx8xx/dimm.h')
| -rw-r--r-- | board/mbx8xx/dimm.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/board/mbx8xx/dimm.h b/board/mbx8xx/dimm.h new file mode 100644 index 0000000..b40f112 --- /dev/null +++ b/board/mbx8xx/dimm.h @@ -0,0 +1,98 @@ +#ifndef __dimm_h +#define __dimm_h + +/* + * Module name: %M% + * Description: + * Serial Presence Detect Definitions Module + * SCCS identification: %I% + * Branch: %B% + * Sequence: %S% + * Date newest applied delta was created (MM/DD/YY): %G% + * Time newest applied delta was created (HH:MM:SS): %U% + * SCCS file name %F% + * Fully qualified SCCS file name: + * %P% + * Copyright: + * (C) COPYRIGHT MOTOROLA, INC. 1996 + * ALL RIGHTS RESERVED + * Notes: + * 1. All data was taken from an IBM application note titled + * "Serial Presence Detect Definitions". + * History: + * Date Who + * + * 10/24/96 Rob Baxter + * Initial release. + * + */ + +/* + * serial PD byte assignment address map (256 byte EEPROM) + */ +typedef struct dimm +{ + uchar n_bytes; /* 00 number of bytes written/used */ + uchar t_bytes; /* 01 total number of bytes in serial PD device */ + uchar fmt; /* 02 fundamental memory type (FPM/EDO/SDRAM) */ + uchar n_row; /* 03 number of rows */ + uchar n_col; /* 04 number of columns */ + uchar n_banks; /* 05 number of banks */ + uchar data_w_lo; /* 06 data width */ + uchar data_w_hi; /* 07 data width */ + uchar ifl; /* 08 interface levels */ + uchar a_ras; /* 09 RAS access */ + uchar a_cas; /* 0A CAS access */ + uchar ct; /* 0B configuration type (non-parity/parity/ECC) */ + uchar refresh_rt; /* 0C refresh rate/type */ + uchar p_dram_o; /* 0D primary DRAM organization */ + uchar s_dram_o; /* 0E secondary DRAM organization (parity/ECC-checkbits) */ + uchar reserved[17]; /* 0F reserved fields for future offerings */ + uchar ss_info[32]; /* 20 superset information (may be used in the future) */ + uchar m_info[64]; /* 40 manufacturer information (optional) */ + uchar unused[128]; /* 80 unused storage locations */ +} dimm_t; + +/* + * memory type definitions + */ +#define DIMM_MT_FPM 1 /* standard FPM (fast page mode) DRAM */ +#define DIMM_MT_EDO 2 /* EDO (extended data out) */ +#define DIMM_MT_PN 3 /* pipelined nibble */ +#define DIMM_MT_SDRAM 4 /* SDRAM (synchronous DRAM) */ + +/* + * row addresses definitions + */ +#define DIMM_RA_RDNDNT (1<<7) /* redundant addressing */ +#define DIMM_RA_MASK 0x7f /* number of row addresses mask */ + +/* + * module interface levels definitions + */ +#define DIMM_IFL_TTL 0 /* TTL/5V tolerant */ +#define DIMM_IFL_LVTTL 1 /* LVTTL (not 5V tolerant) */ +#define DIMM_IFL_HSTL15 2 /* HSTL 1.5 */ +#define DIMM_IFL_SSTL33 3 /* SSTL 3.3 */ +#define DIMM_IFL_SSTL25 4 /* SSTL 2.5 */ + +/* + * DIMM configuration type definitions + */ +#define DIMM_CT_NONE 0 /* none */ +#define DIMM_CT_PARITY 1 /* parity */ +#define DIMM_CT_ECC 2 /* ECC */ + +/* + * row addresses definitions + */ +#define DIMM_RRT_SR (1<<7) /* self refresh flag */ +#define DIMM_RRT_MASK 0x7f /* refresh rate mask */ +#define DIMM_RRT_NRML 0x00 /* normal (15.625us) */ +#define DIMM_RRT_R_3_9 0x01 /* reduced .25x (3.9us) */ +#define DIMM_RRT_R_7_8 0x02 /* reduced .5x (7.8us) */ +#define DIMM_RRT_E_31_3 0x03 /* extended 2x (31.3us) */ +#define DIMM_RRT_E_62_5 0x04 /* extended 4x (62.5us) */ +#define DIMM_RRT_E_125 0x05 /* extended 8x (125us) */ + +#endif /* __dimm_h */ |