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Diffstat (limited to 'bsps/sh/gensh4/include/sdram.h')
| -rw-r--r-- | bsps/sh/gensh4/include/sdram.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/bsps/sh/gensh4/include/sdram.h b/bsps/sh/gensh4/include/sdram.h new file mode 100644 index 0000000000..52acaa61db --- /dev/null +++ b/bsps/sh/gensh4/include/sdram.h @@ -0,0 +1,40 @@ +/* + * SDRAM Mode Register + * Based on Fujitsu MB81F643242B data sheet. + * + * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia + * Author: Victor V. Vengerov <vvv@oktet.ru> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef __SDRAM_H__ +#define __SDRAM_H__ + +/* SDRAM Mode Register */ +#define SDRAM_MODE_BL 0x0007 /* Burst Length: */ +#define SDRAM_MODE_BL_1 0x0000 /* 0 */ +#define SDRAM_MODE_BL_2 0x0001 /* 2 */ +#define SDRAM_MODE_BL_4 0x0002 /* 4 */ +#define SDRAM_MODE_BL_8 0x0003 /* 8 */ +#define SDRAM_MODE_BL_16 0x0004 /* 16 */ +#define SDRAM_MODE_BL_32 0x0005 /* 32 */ +#define SDRAM_MODE_BL_64 0x0006 /* 64 */ +#define SDRAM_MODE_BL_FULL 0x0007 /* Full column */ + +#define SDRAM_MODE_BT 0x0008 /* Burst Type: */ +#define SDRAM_MODE_BT_SEQ 0x0000 /* Sequential */ +#define SDRAM_MODE_BT_ILV 0x0008 /* Interleave */ + +#define SDRAM_MODE_CL 0x0070 /* CAS Latency: */ +#define SDRAM_MODE_CL_1 0x0010 /* 1 */ +#define SDRAM_MODE_CL_2 0x0020 /* 2 */ +#define SDRAM_MODE_CL_3 0x0030 /* 3 */ + +#define SDRAM_MODE_OPC 0x0200 /* Opcode: */ +#define SDRAM_MODE_OPC_BRBW 0x0000 /* Burst read & Burst write */ +#define SDRAM_MODE_OPC_BRSW 0x0200 /* Burst read & Single write */ + +#endif |