168 lines
4.6 KiB
C
168 lines
4.6 KiB
C
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/*++
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Copyright (c) 1992, 1993 Digital Equipment Corporation
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Module Name:
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environ.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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// 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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#ifdef EISA_PLATFORM
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//
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// Defines for the non-volatile configuration tables.
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//
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#define NV_NUMBER_OF_ENTRIES 40
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#define NV_LENGTH_OF_IDENTIFIER (1024 - (NV_NUMBER_OF_ENTRIES * 16) - 8)
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#define NV_LENGTH_OF_DATA (2048 -16)
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#define LENGTH_OF_ENVIRONMENT 1024
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#define LENGTH_OF_EISA_DATA 2044
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#define MAXIMUM_ENVIRONMENT_VALUE 256
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#define MAX_NUMBER_OF_ENVIRONMENT_VARIABLES 40
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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[NV_NUMBER_OF_ENTRIES]; // 0 to 640-4
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UCHAR Identifier[NV_LENGTH_OF_IDENTIFIER]; // 640 to (1K - 8 - 4)
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ULONG Monitor; // 1K-8
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ULONG Floppy; // 1K-4
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ULONG Floppy2; // 1K
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ULONG KeyboardType; // 1K+4
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UCHAR Data[NV_LENGTH_OF_DATA]; // Unused space 1K+8 to 3K-8-4
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UCHAR Checksum1[4]; // Data checksum 3K-8
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UCHAR Environment[LENGTH_OF_ENVIRONMENT]; // Env Variables 3K-4 to 4K-4-4
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UCHAR Checksum2[4]; // Env checksum 4K-4
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UCHAR EisaData[LENGTH_OF_EISA_DATA]; // Eisa Data (4K to 6K-4)
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UCHAR Checksum3[4]; // EisaData checksum
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} NV_CONFIGURATION, *PNV_CONFIGURATION;
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//
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// Defines for the volatile configuration tables.
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// smd - Increased the number of entries, length of Identifier and length
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// of data.
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//
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#define NUMBER_OF_ENTRIES 200
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#define LENGTH_OF_IDENTIFIER (3*1024)
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#define LENGTH_OF_DATA 2048
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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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#else // EISA_PLATFORM
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//
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// Defines for the Non-Volatile configuration tables.
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//
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// SMD - We have reduced the size of the NVRAM from 6K to 3K
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// If needed we could take a few bytes from ENVIRONMENT
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// since there is tons of empty space there.
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//
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#define LENGTH_OF_ENVIRONMENT ((3*1024) - 16 - 4)
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#define MAXIMUM_ENVIRONMENT_VALUE 256
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#define MAXIMUM_NUMBER_OF_ENVIRONMENT_VARIABLES 28
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#define MAX_NUMBER_OF_ENVIRONMENT_VARIABLES 28
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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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ULONG Monitor; //0
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ULONG Floppy; //4
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ULONG Floppy2; //8
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ULONG KeyboardType; //12
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UCHAR Environment[LENGTH_OF_ENVIRONMENT]; //16 to (3K-4)
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UCHAR Checksum[4];
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} NV_CONFIGURATION, *PNV_CONFIGURATION;
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//
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// Defines for the Volatile configuration tables.
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//
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#define NUMBER_OF_ENTRIES 40
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#define LENGTH_OF_IDENTIFIER (1024 - (NUMBER_OF_ENTRIES * 16))
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#define LENGTH_OF_DATA 2048
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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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} CONFIGURATION, *PCONFIGURATION;
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#endif // EISA_PLATFORM
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//
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// The value of HalpCMOSRamBase must be set at initialization:
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//
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#define NVRAM_CONFIGURATION HalpCMOSRamBase
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