161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
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/*++
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Copyright (c) 1992 Digital Equipment Corporation
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Module Name:
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xxenv.h
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Abstract:
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This module contains definitions for environment variable support
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under the HAL. (Parts taken from J. Derosa's FWP.H)
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Author:
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Jeff McLeman (DEC) 17-Sep-1992
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Revision History:
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--*/
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//
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// If any aspect of the NVRAM component / configuration data structure
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// is changed for the Alpha/Jensen machine, the module jencds.c may also need
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// to be changed.
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//
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//
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// Define the private configuration packet structure, which contains a
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// configuration component as well as pointers to the component's parent,
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// peer, child, and configuration data.
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//
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typedef struct _CONFIGURATION_PACKET {
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CONFIGURATION_COMPONENT Component;
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struct _CONFIGURATION_PACKET *Parent;
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struct _CONFIGURATION_PACKET *Peer;
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struct _CONFIGURATION_PACKET *Child;
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PVOID ConfigurationData;
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} CONFIGURATION_PACKET, *PCONFIGURATION_PACKET;
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//
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// The compressed configuration packet structure used to store configuration
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// data in NVRAM.
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//
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typedef struct _COMPRESSED_CONFIGURATION_PACKET {
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UCHAR Parent;
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UCHAR Class;
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UCHAR Type;
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UCHAR Flags;
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ULONG Key;
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UCHAR Version;
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UCHAR Revision;
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USHORT ConfigurationDataLength;
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USHORT Identifier;
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USHORT ConfigurationData;
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} COMPRESSED_CONFIGURATION_PACKET, *PCOMPRESSED_CONFIGURATION_PACKET;
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//
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// Defines for Identifier index.
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//
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#define NO_CONFIGURATION_IDENTIFIER 0xFFFF
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//
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// Defines for the volatile and non-volatile configuration tables.
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//
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#define NUMBER_OF_ENTRIES 104
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#define LENGTH_OF_IDENTIFIER 2000
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#define LENGTH_OF_DATA 2048
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#define LENGTH_OF_ENVIRONMENT 1500
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#define LENGTH_OF_EISA_DATA 2500
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#define MAXIMUM_ENVIRONMENT_VALUE 256
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#define MAX_NUMBER_OF_ENVIRONMENT_VARIABLES 28
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//
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// The volatile configuration table structure.
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//
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typedef struct _CONFIGURATION {
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CONFIGURATION_PACKET Packet[NUMBER_OF_ENTRIES];
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UCHAR Identifier[LENGTH_OF_IDENTIFIER];
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UCHAR Data[LENGTH_OF_DATA];
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UCHAR EisaData[LENGTH_OF_EISA_DATA];
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} CONFIGURATION, *PCONFIGURATION;
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//
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// The non-volatile configuration table structure.
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//
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typedef struct _NV_CONFIGURATION {
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COMPRESSED_CONFIGURATION_PACKET Packet[NUMBER_OF_ENTRIES];
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UCHAR Identifier[LENGTH_OF_IDENTIFIER];
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UCHAR Data[LENGTH_OF_DATA];
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UCHAR Checksum1[4];
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UCHAR Environment[LENGTH_OF_ENVIRONMENT];
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UCHAR Checksum2[4];
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UCHAR EisaData[LENGTH_OF_EISA_DATA];
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UCHAR Checksum3[4];
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} NV_CONFIGURATION, *PNV_CONFIGURATION;
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//
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// Define identifier index, data index, pointer to configuration table, and
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// the system identifier.
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//
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extern ULONG IdentifierIndex;
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extern ULONG DataIndex;
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extern ULONG EisaDataIndex;
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extern SYSTEM_ID SystemId;
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//
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// PROM layout.
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//
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#define PROM_VIRTUAL_BASE 0xA0D00000
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//
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// Start of firmware executable code. Code lives in blocks 7, 8, 9, A and B.
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//
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#define PROM_PAGE7 ( PROM_VIRTUAL_BASE+0x70000 )
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//
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// Component Data Structure, environment variables.
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// These contain their own checksums.
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//
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#define PROM_PAGEC ( PROM_VIRTUAL_BASE+0xC0000 )
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#define NVRAM_CONFIGURATION PROM_PAGEC
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//
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// Alpha/Jensen PROM command definitions.
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//
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#define PROM_ERASE_SETUP 0x20
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#define PROM_ERASE_CONFIRM 0xD0
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#define PROM_BYTEWRITE_SETUP 0x40
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#define PROM_READ_STATUS 0x70
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#define PROM_CLEAR_STATUS 0x50
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#define PROM_READ_ARRAY 0xff
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//
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// The following structures are used for the timer mechanism for
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// updating the ROM
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//
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typedef struct _PROMTIMER_ {
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KTIMER Timer;
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KDPC Dpc;
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} PROMTIMER, *PPROMTIMER;
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