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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
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1 #ifndef CYGONCE_HAL_HAL_SPD_H
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2 #define CYGONCE_HAL_HAL_SPD_H
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3
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4 //=============================================================================
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5 //
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6 // hal_spd.h
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7 //
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8 // HAL header for SDRAM Serial Presence Detect support.
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9 //
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10 //=============================================================================
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11 //####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License along
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26 // with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use macros
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30 // or inline functions from this file, or you compile this file and link it
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31 // with other works to produce a work based on this file, this file does not
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32 // by itself cause the resulting work to be covered by the GNU General Public
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33 // License. However the source code for this file must still be made available
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34 // in accordance with section (3) of the GNU General Public License.
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35 //
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36 // This exception does not invalidate any other reasons why a work based on
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37 // this file might be covered by the GNU General Public License.
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38 //
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39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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40 // at http://sources.redhat.com/ecos/ecos-license
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41 // -------------------------------------------
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42 //####ECOSGPLCOPYRIGHTEND####
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43 //=============================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): msalter
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47 // Contributors:msalter
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48 // Date: 2002-01-17
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49 // Purpose: Generic HAL SPD header.
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50 // Usage: #include <cyg/hal/hal_spd.h>
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51 // Description: This header provides byte numbers and bit definitions for
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52 // serial EEPROM containing SDRAM module information.
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53 //
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54 //####DESCRIPTIONEND####
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55 //
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56 //=============================================================================
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57
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58 // Commonly used bytes
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59 #define SPD_BANKCNT 5 // number of module banks
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60 #define SPD_CONFIG 11 // DIMM configuration type (Parity or not, EEC)
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61 #define SPD_REFRESH 12 // Referesh rate
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62 #define SPD_SDRAM_WIDTH 13 // DRAM width
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63 #define SPD_MOD_ATTRIB 21 // DRAM module attribute
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64 #define SPD_BANKSZ 31 // module bank density
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65 #define SPD_CHECKSUM 63 // checksum for bytes 0-62
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66
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67 // SPD_MOD_ATTRIB bits
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68 #define SPD_ATTRIB_BUF_CTL 0x01 // Buffered Addr/Control inputs
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69 #define SPD_ATTRIB_REG_CTL 0x02 // Registered Addr/Control inputs
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70 #define SPD_ATTRIB_PLL 0x04 // On-card PLL
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71 #define SPD_ATTRIB_BUF_DQ 0x08 // Buffered DQMB inputs
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72 #define SPD_ATTRIB_REG_DQ 0x10 // Registered DQMB inputs
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73 #define SPD_ATTRIB_DIFF 0x20 // Differential clock input
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74 #define SPD_ATTRIB_RRA 0x40 // Redundant Row Address
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75
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76 //-----------------------------------------------------------------------------
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77 #endif // CYGONCE_HAL_HAL_SPD_H
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78 // End of hal_spd.h