148 lines
4.6 KiB
PHP
148 lines
4.6 KiB
PHP
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; Copyright (c) Microsoft Corporation 1989-1991. All Rights Reserved.
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;******************************************************************************
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;
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; Title: smartdrv.inc - smartdrv equates & structures
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;
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; Version: 1.00
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;
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; Date: 15-Sep-1989
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;
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; Author: ARR
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;
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;------------------------------------------------------------------------------
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;
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; Change log:
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;
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; DATE REV DESCRIPTION
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; ----------- --- -----------------------------------------------------------
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; 15-Sep-1989 ARR Original
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;
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;==============================================================================
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;
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; Device name of SMARTDRV
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;
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SD_DEV_NAME equ "SMARTAAR",0
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;
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; SMARTDRV cache type (XMS or EMS) -- SD_IR_Driver_Type field
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;
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SD_CACHE_XMS equ 1 ; Cache is in XMS
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SD_CACHE_EMS equ 2 ; Cache is in EMS
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;
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; Structure of the data returned on the SMARTDRV IOCTL read call
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;
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SD_IOCTL_Read struc
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SD_IR_Write_Through db ? ; Write-through flag, currently always 1
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SD_IR_Write_Buff db ? ; Buffer write flag, currently always 0
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SD_IR_Enable_Int13 db ? ; Cache enable flag, 1 = enabled
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SD_IR_Driver_Type db ? ; Type 1 (XMS cache) or 2 (EMS cache)
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SD_IR_Tick_Setting dw ? ; Ticks between flushes, currently unused
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SD_IR_Lock_Cache db ? ; Non-zero if cache is locked
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SD_IR_Reboot_Flush db ? ; Non-zero if cache should be flushed on reboot
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SD_IR_Cache_All db ? ; Zero if full track writes are not cached
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db ? ; Unused
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SD_IR_Original_INT13 dd ? ; INT 13 address SMARTDRV hooked
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SD_IR_Version dw ? ; SMARTDrive version, packed BCD
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dw ? ; Unused
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; Next three values are used for computing
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; cache statistics. They may be scaled rather
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; than absolute values
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SD_IR_Total_Sec_Read dw ? ; Count of sectors read
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SD_IR_Cache_Sec_Read dw ? ; Count of sectors read from cache
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SD_IR_Track_Sec_Read dw ? ; Count of sectors read from track buffer
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; Cache statistics
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SD_IR_Cache_Hit_Ratio db ? ; = Cache_Sec_Read * 100 / Total_Sec_Read
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SD_IR_Track_Hit_Ratio db ? ; = Track_Sec_Read * 100 / Total_Sec_Read
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SD_IR_Total_Tracks dw ? ; Number of tracks in the cache
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SD_IR_Total_Used dw ? ; Tracks currently in use
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SD_IR_Total_Locked dw ? ; Tracks currently locked
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SD_IR_Total_Dirty dw ? ; Tracks currently dirty
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; Information for resizing cache
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; All values are in terms of 16Kb pages.
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SD_IR_Current_Size dw ? ; Current size of the cache, in 16Kb pages
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SD_IR_Dev_Size dw ? ; Original size requested by user
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SD_IR_Min_Cache_Size dw ? ; Minimum allowable size
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SD_IOCTL_Read ends
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;
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; IOCTL Write functions
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; The function is encoded in the first byte of the IOCTL write data
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;
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SD_IOCTL_WR_Flush equ 0 ; Flush the cache
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SD_IOCTL_WR_Flush_Invalidate equ 1 ; Flush the cache and discard it
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SD_IOCTL_WR_Disable_Cache equ 2 ; Turn caching off
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SD_IOCTL_WR_Enable_Cache equ 3 ; Turn caching on
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SD_IOCTL_WR_Set_Tick equ 5 ; Set tick count for flush
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SD_IOCTL_WR_Lock equ 6 ; Lock current cache contents
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SD_IOCTL_WR_Unlock equ 7 ; Unlock current cache contents
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SD_IOCTL_WR_Reboot_Flush equ 8 ; Set Reboot_Flush flag
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SD_IOCTL_WR_Shrink_Cache equ 11 ; Reduce cache size
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SD_IOCTL_WR_Grow_Cache equ 12 ; Increase cache size
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SD_IOCTL_WR_Set_INT_13 equ 13 ; Set the address SMARTDRV
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; chains to on INT 13s
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;
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; Structures for the IOCTL write calls
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;
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; These calls do not take any parameters so the correct write count is 1
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; (the function code byte)
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;
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; WR_Flush
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; WR_Flush_Invalidate
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; WR_Disable_Cache
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; WR_Enable_Cache
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; WR_Set_Tick
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; WR_Lock
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; WR_Unlock
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;
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SD_IOCTL_WR_NoParm struc
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SD_I_W_Func db ?
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SD_IOCTL_WR_NoParm ends
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;
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; WR_Reboot_Flush
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;
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SD_IOCTL_WR_Reboot struc
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SD_I_W_FuncR db SD_IOCTL_WR_Reboot_Flush
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SD_I_W_RebootFlg db ? ; 0 to turn reboot flush off
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; 1 to turn reboot flush on
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SD_IOCTL_WR_Reboot ends
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;
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; WR_Shrink_Cache
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; WR_Grow_Cache
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;
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SD_IOCTL_WR_GrwShrk struc
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SD_I_W_FuncGS db ? ; Function, one of:
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; SD_IOCTL_WR_Shrink_Cache
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; SD_IOCTL_WR_Grow_Cache
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SD_I_W_GS_Size dw ? ; Count of 16k "pages" to
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; grow or shrink cache by
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; THIS IS A SIZE DELTA
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; not a total size.
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SD_IOCTL_WR_GrwShrk ends
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;
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; WR_Set_INT_13
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;
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SD_IOCTL_WR_SetI13 struc
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SD_I_W_FuncS13 db SD_IOCTL_WR_Set_INT_13
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SD_I_W_S13_Addr dd ? ; Segment:Offset address
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; to set Original_INT13 to.
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; NO RECORD IS KEPT OF PREV
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; VALUE, caller's responsible
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; for save and restore.
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SD_IOCTL_WR_SetI13 ends
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