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| author | Steven J. Magnani <steve@digidescorp.com> | 2005-09-13 14:54:25 +0000 |
|---|---|---|
| committer | Steven J. Magnani <steve@digidescorp.com> | 2005-09-13 14:54:25 +0000 |
| commit | 61764f45dca2c5d5b3faaec1c912f3d50e8bd8e9 (patch) | |
| tree | d79f1e0cfd4f3c4ae95b5df4b529c15ddc4bad99 /src/include/spd.h | |
| parent | e91619ac0595f1fe8adf61df75e79ecf79800e86 (diff) | |
| download | coreboot-61764f45dca2c5d5b3faaec1c912f3d50e8bd8e9.tar.xz | |
Initial revision.
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2027 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/include/spd.h')
| -rw-r--r-- | src/include/spd.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/include/spd.h b/src/include/spd.h new file mode 100644 index 0000000000..64476563db --- /dev/null +++ b/src/include/spd.h @@ -0,0 +1,89 @@ +/*
+ * $Header: /home/cvs/BIR/ca-cpu/freebios/src/include/spd.h,v 1.1 2005/07/11 16:03:54 smagnani Exp $
+ *
+ * spd.h: Definitions for Serial Presence Detect (SPD) data
+ * stored on SDRAM modules
+ *
+ * Copyright (C) 2005 Digital Design Corporation
+ *
+ * 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
+ *
+ * $Log: spd.h,v $
+ * Revision 1.1 2005/07/11 16:03:54 smagnani
+ * Initial revision.
+ *
+ *
+ */
+
+#ifndef __SPD_H_DEFINED
+#define __SPD_H_DEFINED
+
+// Byte numbers
+#define SPD_MEMORY_TYPE 2
+#define SPD_NUM_ROWS 3
+#define SPD_NUM_COLUMNS 4
+#define SPD_NUM_DIMM_BANKS 5
+#define SPD_MODULE_DATA_WIDTH_LSB 6
+#define SPD_MODULE_DATA_WIDTH_MSB 7
+#define SPD_MODULE_VOLTAGE 8
+#define SPD_MIN_CYCLE_TIME_AT_CAS_MAX 9
+#define SPD_DIMM_CONFIG_TYPE 11
+#define SPD_REFRESH 12
+#define SPD_PRIMARY_DRAM_WIDTH 13
+#define SPD_SUPPORTED_BURST_LENGTHS 16
+#define SPD_NUM_BANKS_PER_DRAM 17
+#define SPD_ACCEPTABLE_CAS_LATENCIES 18
+#define SPD_MODULE_ATTRIBUTES 21
+#define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_05 23
+#define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_10 25
+#define SPD_MIN_ROW_PRECHARGE_TIME 27
+#define SPD_MIN_RAS_TO_CAS_DELAY 29
+#define SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY 30
+#define SPD_ADDRESS_CMD_HOLD 33
+
+
+// SPD_MEMORY_TYPE values
+#define MEMORY_TYPE_SDRAM_DDR 7
+
+// SPD_MODULE_VOLTAGE values
+#define SPD_VOLTAGE_SSTL2 4
+
+// SPD_DIMM_CONFIG_TYPE values
+#define ERROR_SCHEME_NONE 0
+#define ERROR_SCHEME_PARITY 1
+#define ERROR_SCHEME_ECC 2
+
+// SPD_ACCEPTABLE_CAS_LATENCIES values
+#define SPD_CAS_LATENCY_1_0 0x01
+#define SPD_CAS_LATENCY_1_5 0x02
+#define SPD_CAS_LATENCY_2_0 0x04
+#define SPD_CAS_LATENCY_2_5 0x08
+#define SPD_CAS_LATENCY_3_0 0x10
+#define SPD_CAS_LATENCY_3_5 0x20
+#define SPD_CAS_LATENCY_4_0 0x40
+
+// SPD_SUPPORTED_BURST_LENGTHS values
+#define SPD_BURST_LENGTH_1 1
+#define SPD_BURST_LENGTH_2 2
+#define SPD_BURST_LENGTH_4 4
+#define SPD_BURST_LENGTH_8 8
+#define SPD_BURST_LENGTH_PAGE (1<<7)
+
+
+// SPD_MODULE_ATTRIBUTES values
+#define MODULE_BUFFERED 1
+#define MODULE_REGISTERED 2
+
+#endif // __SPD_H_DEFINED
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