mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 18:41:03 +00:00
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
|
#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 */
|