Update the EDisk (RAM Disk) driver
This commit is contained in:
Elliot Nunn
parent
3a7bff43c0
commit
0bd74145ca
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@ -113,8 +113,6 @@
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MACHINE MC68020
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NewEdiskProt EQU 1
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_TestManager OPWORD $A06B
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macro
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@ -138,7 +136,7 @@ EDiskDRVRflags SET EDiskDRVRflags!1<<dStatEnable
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EDiskDRVRflags SET EDiskDRVRflags!1<<dNeedLock
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dc.b EDiskDRVRflags,0 ; drvFlags (upper byte)
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dc.w 0 ; drvDelay, no delay
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dc.w 60 ; drvDelay
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dc.w 0 ; drvEMask, no event mask
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dc.w 0 ; drvMenu, no menu
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dc.w EDiskOpen-EDiskDRVR ; drvOpen, offset of OPEN routine
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@ -190,13 +188,16 @@ ControlDecode
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dc.w ctlDriveInfo-(*+4)
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dc.w infoCC ; Drive Info control call
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dc.w BrandNewFunc-(*+4)
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dc.w 65
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dc.w -1 ; indicate end of control decode table
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dc.w ControlErr ; return ControlErr if unknown csCode
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title 'EDisk Driver - Open processing'
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;_______________________________________________________________________
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;
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; Routine: EDiskOpen
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; Routine: EDiskOpen 60
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; Inputs: A0 - pointer to I/O ParamBlock
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; A1 - pointer to Device Control Entry (DCE)
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; Outputs: D0 - Result Code (noErr/openErr)
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@ -224,22 +225,7 @@ ControlDecode
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InitTable
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dc.l 0 ; RamDisk doesn't have poll pointer
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dc.w RAMDiskHandler-(*+2) ; RamDisk function handler
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dc.w RAMDiskMediaIcon-(*+2) ; RamDisk media icon pointer
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dc.w RAMDiskDriveIcon-(*+2) ; RamDisk drive icon pointer
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dc.w RAMDiskName-(*+2) ; RamDisk drive name pointer
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dc.l (1<<15)+\ ; volatile media
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(0<<11)+\ ; primary
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(1<<10)+\ ; fixed
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(0<<9)+\ ; iwm (not SCSI)
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(0<<8)+\ ; internal
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ramDiskType ; RAM disk
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dc.b (1<<CreateWithXSums) ; flags
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dc.b $48 ; DiskInPlaceInit = non-ejectable, re-mount
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InitTablePPC
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dc.l 0 ; RamDisk doesn't have poll pointer
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dc.w RAMDiskHandlerPPC-(*+2) ; RamDisk function handler for PowerPC
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dc.w RAMDiskHandler-(*+2) ; RamDisk function handler for PowerPC
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dc.w RAMDiskMediaIcon-(*+2) ; RamDisk media icon pointer
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dc.w RAMDiskDriveIcon-(*+2) ; RamDisk drive icon pointer
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dc.w RAMDiskName-(*+2) ; RamDisk drive name pointer
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@ -251,35 +237,7 @@ InitTablePPC
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ramDiskType ; RAM disk
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dc.b (0<<CreateWithXSums) ; flags
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dc.b $48 ; DiskInPlaceInit = non-ejectable, re-mount
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PrimaryROMdisk
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dc.l 0 ; RomDisk doesn't have poll pointer
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dc.w ROMDiskHandler-(*+2) ; RomDisk function handler
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dc.w ROMDiskMediaIcon-(*+2) ; RomDisk media icon pointer
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dc.w ROMDiskDriveIcon-(*+2) ; RomDisk drive icon pointer
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dc.w ROMDiskName-(*+2) ; RomDisk drive name pointer
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dc.l (0<<11)+\ ; primary
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(1<<10)+\ ; fixed
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(0<<9)+\ ; iwm (not SCSI)
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(0<<8)+\ ; internal
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romDiskType ; ROM disk
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dc.b (1<<CreateWithXSums) ; flags
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dc.b $08 ; DiskInPlaceInit = non-ejectable
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InitEntrySize equ *-PrimaryROMdisk ; size of an initialization table entry
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SecondaryROMdisk
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dc.l 0 ; RomDisk doesn't have poll pointer
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dc.w ROMDiskHandler-(*+2) ; RomDisk function handler
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dc.w ROMDiskMediaIcon-(*+2) ; RomDisk media icon pointer
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dc.w ROMDiskDriveIcon-(*+2) ; RomDisk drive icon pointer
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dc.w ROMDiskName-(*+2) ; RomDisk drive name pointer
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dc.l (1<<11)+\ ; secondary
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(1<<10)+\ ; fixed
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(0<<9)+\ ; iwm (not SCSI)
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(0<<8)+\ ; internal
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romDiskType ; ROM disk
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dc.b (1<<CreateWithXSums) ; flags
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dc.b $08 ; DiskInPlaceInit = non-ejectable
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InitEntrySize equ *-InitTable ; size of an initialization table entry
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EDiskOpen ; all regs saved by Device Manager
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move.l a0,-(sp) ; save pointer to I/O param block
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@ -303,7 +261,7 @@ EDiskOpen ; all regs saved by Device Manager
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lea InitTable,a6 ; a6 := assume pointer to 68k initial values <2>
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IF newEdiskProt THEN
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IF 0 THEN
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cmpi.b #EMMU1,MMUType ; check for an emulated MMU
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bne.s @NoEMMU
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lea InitTablePPC,a6 ; a6 := pointer to PowerPC initial values
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@ -311,35 +269,16 @@ EDiskOpen ; all regs saved by Device Manager
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ENDIF
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move.l BootGlobPtr,a2 ; get ptr to BootGlobs <T2>
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move.l sgRamDiskBase(a2),d2 ; base of RAM disk <T4>
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move.l d2,d3 ; get a copy in d3 <T4>
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move.l sgRamDiskBase(a2),d1 ; base of RAM disk <T4>
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move.l d1,d3 ; get a copy in d3 <T4>
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add.l sgRamDiskSize(a2),d3 ; end of ram disk in d3 <T4>
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suba.l a2,a2 ; a2 := HeaderInfoPtr (none for RamDisk) <2>
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move.l d2,d1 ; get start addr in d2 <T4>
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moveq.l #0,d2 ; DataStartPtr := 0 <2>
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cmp.l d1,d3 ; see if it has any bytes
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bsr CreateEDrive ; create the RAM disk
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@noDisk ; ENDIF
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; search for, and install ROM disks
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movea.l RomBase,a2 ; start searching at the base of ROM
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@RomDiskLoop ;
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bsr.w CheckForRomDisk ; see if it is a ROM disk
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bne.s @NextRomDisk ; if not, try the next block
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moveq.l #0,d1 ; assume no checksums unless header says otherwise
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move.l a2,d2 ; DataStartPtr := base of rom disk for now
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move.l a2,d3 ; DataEndPtr := base of rom disk for now
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bsr.s CreateEDrive ; create the RAM disk
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lea SecondaryROMdisk,a6 ; all future ROM disks are secondary
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@NextRomDisk ;
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adda.l #RomDiskAlign,a2 ; point to next block to check
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cmpa.l #RomSpaceEnd,a2 ; see if end reached
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blo.s @RomDiskLoop ; search the entire space
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; see if we have any EDisks to drive, abort OPEN if none.
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moveq.l #OpenErr,d0 ; if no drives found, return OpenErr
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@ -362,20 +301,6 @@ EDiskOpen ; all regs saved by Device Manager
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move.w @RTS,FindDqePatch(a2) ; initialize FindDQE patch routine
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move.w @RTS,PrimePatch(a2) ; initialize Prime patch routine
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; Install the VBL task to look for SLIM insertions and removals
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lea EDiskPollTask,a4 ; get the task address
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moveq.l #8-1,d4 ; loop counter (8 times)
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@InitPolling
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lea VTask(a2),a0 ; a0 := pointer to VTask
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jsr (a4) ; poll 8 times to init inserted status
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dbra d4,@InitPolling ; and mount drives, and compute sizes
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lea VTask(a2),a0 ; a0 <- VBL task
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addq.w #vType,qType(a0) ; initialize qType field
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move.l a4,vblAddr(a0) ; initialize vblAddr field
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_VInstall ; install the VBL task
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moveq.l #NoErr,d0 ; no error
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@OpenDone
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movea.l (sp)+,a0 ; restore pointer to I/O param block
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@ -385,7 +310,7 @@ EDiskOpen ; all regs saved by Device Manager
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;_______________________________________________________________________
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;
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; Routine: CreateEDrive
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; Routine: CreateEDrive D8
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; Inputs: ccr.z - bne if drive should be created, beq if not
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; A2 - HeaderInfoPtr
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; D1 - CheckSumPtr
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@ -413,7 +338,7 @@ CreateEDrive
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_NewPtr ,Sys,Clear ; allocate the drive info
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bne.s @Done ; if can't allocate, don't create drive
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add.l #DQE-SLIMRegPtr,a0 ; point to the drive queue entry <T6>
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lea DQE-SLIMRegPtr(a0),a0 ; point to the drive queue entry <T6>
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movea.l a6,a3 ; a3 := running pointer to init table entry
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move.l (a3)+,SLIMRegPtr(a0) ; initialize the SLIMRegPtr <T6>
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@ -443,7 +368,7 @@ CreateEDrive
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move.l d3,RamDiskSize(a0) ; store it in globals <T6>
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addq.w #1,qType(a0) ; use long drive size format
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addq.w #1,Installed(a0) ; mark the drive as installed
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addq.b #1,Installed(a0) ; mark the drive as installed
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move.l d7,d0 ; get disk drive number, and refNum
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swap d0 ; move to high word, refNum to low word
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move.l a0,a3 ; make a copy of ptr to info
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@ -452,87 +377,17 @@ CreateEDrive
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move.l d1,a0 ; get ptr to base of Edisk data
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move.l d3,d1 ; get RamDiskSize
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moveq.l #DisableEDiskWrites,d0 ; always disable writes at startup
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bsr.w HWDependent ; disable writing to the EDisk
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bsr HWDependent ; disable writing to the EDisk
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bsr EDiskPollTask
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@Done addq.w #1,d7 ; update drive number
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adda.w #InitEntrySize,a6 ; point to next drive init entry
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rts ; EDisk drive is installed
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title 'EDisk Driver - Check for ROM Disk'
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;_______________________________________________________________________
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;
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; Routine: CheckForRomDisk
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; Inputs: A2 - HeaderInfoPtr
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; D7.hi - EDisk Driver RefNum
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; Outputs: D0 - zero if valid ROM disk header, else non-zero
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; ccr.z - bne if invalid header
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; Destroys: D0, D1, A0, A3, A4
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; Calls: none
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; Called by: EDiskOpen
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;
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; Function: Checks the EDisk header to see if it exists (no bus error),
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; and has a valid signature. If it is valid, compares it
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; against all other ROM Disks found, and if it's header block
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; is not identical to any other ROM Disk (in case address
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; wrap around causes repeated images), returns a result
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; indicating that it should be created.
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;
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;_______________________________________________________________________
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with EDiskHeader
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CheckForRomDisk
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move.w sr,-(sp) ; save old interrupt mask
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ori.w #HiIntMask,sr ; disable interrupts (stealing BusErrVct)
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move.l BusErrVct,-(sp) ; save old bus error vector
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lea @NotFound,a0 ; new handler address
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move.l a0,BusErrVct ; setup bus error handler
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movea.l sp,a4 ; mark the stack
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lea HeaderTemplate,a3 ; point to expected values
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lea HdrBlockSize(a2),a0 ; point to header data
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moveq.l #(HdrDeviceSize-HdrBlockSize)/4-1,d0 ; loop counter
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@SigCmpLoop
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cmpm.l (a0)+,(a3)+ ; compare the values
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dbne d0,@SigCmpLoop ; compare the blocks
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@NotFound
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movea.l a4,sp ; pop stack in case of bus error
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move.l (sp)+,BusErrVct ; restore bus error vector
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move.w (sp)+,sr ; restore interrupt mask
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addq.w #1,d0 ; see if we had a match
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bne.s @Done ; exit if not
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; valid header found, now let's see if it's unique.
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move.l d7,d1 ; get driver ref num
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swap d1 ; d1.low := driver ref num
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lea DrvQHdr+QHead-QLink,a0 ; point to the drive queue head
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@CheckNeXTDrive
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move.l QLink(a0),d0 ; check next drive queue element
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beq.s @Done ; if not found, it's unique (d0=0)
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movea.l d0,a0 ; a0 := drive queue element
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cmp.w dQRefNum(a0),d1 ; is this one of ours
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bne.s @CheckNeXTDrive ; if not, check the NeXT one
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cmpi.b #romDiskType,\ ; it's one of ours
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DriveInfo+3(a0) ; is it a ROM disk
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bne.s @CheckNeXTDrive ; if not, check the NeXT one
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moveq.l #EDiskHeaderSize/4-1,d0 ; compare the entire header
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movea.l a2,a3 ; point to our header
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movea.l HeaderInfoPtr(a0),a4 ; point to existing drive's header
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@HdrCmpLoop
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cmpm.l (a3)+,(a4)+ ; compare the values
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dbne d0,@HdrCmpLoop ; compare the blocks
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bne.s @CheckNeXTDrive ; if not the same, check the NeXT one
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@Done tst.l d0 ; set ccr based on D0
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rts ; all done
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endwith
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title 'EDisk Driver - Close processing'
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;_______________________________________________________________________
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;
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; Routine: EDiskClose
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; Routine: EDiskClose 154
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; Inputs: A0 - pointer to I/O ParamBlock
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; A1 - pointer to Device Control Entry (DCE)
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; Outputs: D0 - Result Code (closErr)
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@ -551,7 +406,7 @@ EDiskClose ; all regs saved by Device Manager
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;_______________________________________________________________________
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;
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; Routine: EDiskPrime
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; Routine: EDiskPrime 158
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; Inputs: A0 - pointer to I/O ParamBlock
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; A1 - pointer to Device Control Entry (DCE)
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; Outputs: D0 - Result Code
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@ -667,7 +522,7 @@ EDiskPrime ; all regs saved by Device Manager
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@ReadWrite
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move.l d1,d0 ; get the byte count
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_BlockMove ; move the data
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_BlockMoveData ; move the data
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move.l d1,d4 ; indicate all bytes moved
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bra.s @PrimeDone ; return with success
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title 'EDisk Driver - Read processing'
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@ -824,7 +679,7 @@ EDiskPrime ; all regs saved by Device Manager
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;_______________________________________________________________________
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;
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; Routine: EDiskControl / EDiskStatus / KillIO
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; Routine: EDiskControl 2EE / EDiskStatus 2F4 / KillIO
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; Inputs: A0 - pointer to I/O ParamBlock
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; A1 - pointer to Device Control Entry (DCE)
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; Outputs: D0 - Result Code
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@ -857,11 +712,10 @@ HandleControlStatus
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swap d0 ; get offset of routine
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pea (a2,d0.w) ; push address of the routine
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bra.w FindDQE ; find the DQE before calling routine
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bra FindDQE ; find the DQE before calling routine
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@exit movea.l dCtlStorage(a1),a2 ; a2 := pointer to EDiskVars
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addq.l #4,sp ; <SM4>
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bra.w EDiskDone2 ; return through EDiskDone2 <SM4>
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rts
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ctlKillIO
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@ -875,17 +729,15 @@ ctlEject
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move.l d1,d0 ; get found status, ignore offline
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bne.s @EjectErr ; return error if not found
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bclr.b #MountedFlag,Flags(a3) ; mark it as not mounted
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move.b DiskInPlace(a3),d0 ; see if any disk
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ble.s @EjectDone ; if no disk, just ignore it
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subq.b #8,d0 ; see if ejectable
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cmp.b #8,-3(a3)
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beq.s @EjectDone ; if not ejectable, just ignore it
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; if disk in place was $48 (non-ejectable, but call driver anyway) we will force a
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; disk in place event to be posted by the polling task, to re-mount the volume.
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moveq.l #EjectEDisk,d0 ; hardware dependent function code
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bsr.w HWDependent ; start the eject, update DiskInPlace
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bsr HWDependent ; start the eject, update DiskInPlace
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bset.b #5,dCtlFlags(a1)
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@EjectDone
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moveq.l #noErr,d0 ; return with success
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@EjectErr
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@ -958,12 +810,10 @@ ctlFormat
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cmpa.l a1,a4 ; see if all blocks cleared
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bhi.s @NextBlock ; loop through all of the blocks
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@done move.l d0,d2 ; save error code
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IF newEdiskProt THEN
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; d1 := byte count
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; a0 := source address
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; a3 := ptr to drive queue element
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movem.l (sp)+,a0/d1 ; restore size, length for disabling the disk
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ENDIF
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moveq.l #DisableEDiskWrites,d0 ; hardware dependent function code
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bsr.w HWDependent ; disable writing to the EDisk
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move.l d2,d0 ; restore error code
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@ -1026,7 +876,7 @@ statDrvSts
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clr.w (a1)+ ; return zero for track
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lea WriteProtected(a3),a0 ; start copy with write protected flag
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moveq.l #(DQE-WriteProtected)+dQDrvSz2+2,d0 ; number of bytes to copy
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_BlockMove ; copy the drive info, and return noErr
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_BlockMoveData ; copy the drive info, and return noErr
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@Done rts ; all done
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@ -1070,7 +920,7 @@ IconCommon
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lea IconBuffer(a2),a1 ; get buffer address (dest address)
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move.l a1,(a4) ; return buffer pointer
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move.l #IconAndMaskSize,d0 ; setup byte count for icon and mask
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_BlockMove ; copy the icon into the buffer
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_BlockMoveData ; copy the icon into the buffer
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; copy the "Where String" into the buffer
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@ -1085,14 +935,50 @@ IconCommon
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bls.s @CopyString ; if in range just copy it
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moveq.l #WhereStringSize,d0 ; otherwise truncate to max size
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@CopyString
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_BlockMove ; copy the string into the buffer
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_BlockMoveData ; copy the string into the buffer
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@Done rts ; all done (d0 is noErr from _BlockMove)
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title 'EDisk Driver - BrandNewFunc'
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;_______________________________________________________________________
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;
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; Routine: BrandNewFunc 472
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;
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;_______________________________________________________________________
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BrandNewFunc
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bclr.b #5, 4(a1)
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beq.s @return
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move $18(a1),d1
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lea DrvQHdr+QHead,a3
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@loop
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move.l (a3),d2
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beq.s @return
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move.l d2,a3
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cmp dQRefNum(a3),d1
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bne.s @loop
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btst.b #0,-12(a3)
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bne.s @loop
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bsr Mount
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btst.b #0,-12(a3)
|
||||
bne.s @loop
|
||||
|
||||
bset.b #5,4(a1)
|
||||
bra.s @loop
|
||||
|
||||
@return moveq.l #0,d0
|
||||
rts
|
||||
|
||||
title 'EDisk Driver - FindDQE - Find Drive Queue Element'
|
||||
|
||||
;_______________________________________________________________________
|
||||
;
|
||||
; Routine: FindDQE
|
||||
; Routine: FindDQE 4AE
|
||||
; Inputs: A0 - pointer to I/O ParamBlock
|
||||
; A1 - pointer to Device Control Entry (DCE)
|
||||
; Outputs: D0 - Drive Found and OnLine Status (noErr, NSDrvErr or offLinErr)
|
||||
|
|
@ -1111,8 +997,8 @@ IconCommon
|
|||
|
||||
FindDQE ; find the drive queue element
|
||||
movea.l dCtlStorage(a1),a2 ; a2 := pointer to EDiskVars
|
||||
addq.b #1,Active(a2) ; request in progress, exclude polling <1.2>
|
||||
jsr FindDqePatch(a2) ; allow patching here
|
||||
lea $1c(a0),a4
|
||||
lea DrvQHdr+QHead-QLink,a3 ; get the drive queue head
|
||||
move.w IODrvNum(a0),d2 ; d2 := drive number
|
||||
bpl.s @search ; start searching if drivenum is positive
|
||||
|
|
@ -1131,34 +1017,17 @@ FindDQE ; find the drive queue element
|
|||
bne.s @search ; if not for our driver
|
||||
|
||||
moveq.l #noErr,d1 ; indicate drive is found
|
||||
|
||||
; now check to see if it is really present (onLine)
|
||||
|
||||
tst.b DiskInPlace(a3) ; is there a disk
|
||||
ble.s @offLine ; return off line error if not
|
||||
|
||||
moveq.l #CheckEDiskInserted,d0 ; hardware dependent function code
|
||||
bsr.s HWDependent ; see if disk is inserted
|
||||
beq.s @offLine ; if not, return offline error
|
||||
moveq.l #noErr,d0 ; indicate no disk-in-place
|
||||
|
||||
@Done lea csParam(a0),a4 ; point to param area
|
||||
rts ; return with success (d0 = 0 = noErr)
|
||||
|
||||
@offLine
|
||||
moveq.l #offLinErr,d0 ; indicate no disk-in-place
|
||||
bra.s @Done ; return with error
|
||||
|
||||
|
||||
@notFound
|
||||
moveq.l #NSDrvErr,d1 ; indicate no such drive error
|
||||
moveq.l #NSDrvErr,d0 ; indicate no such drive error
|
||||
bra.s @Done ; return with error
|
||||
rts
|
||||
title 'EDisk Driver - EDiskDone - Command Completion'
|
||||
|
||||
;_______________________________________________________________________
|
||||
;
|
||||
; Routine: EDiskDone
|
||||
; Routine: EDiskDone 4E4
|
||||
; Inputs: A2 - pointer to EDiskVars
|
||||
; D0 - Result Code
|
||||
; Destroys:
|
||||
|
|
@ -1171,8 +1040,6 @@ FindDQE ; find the drive queue element
|
|||
;_______________________________________________________________________
|
||||
|
||||
EDiskDone
|
||||
subq.b #1,Active(a2) ; request complete, allow polling <1.2>
|
||||
EDiskDone2 ; <H6><SM4>
|
||||
movea.l DCEpointer(a2),a1 ; setup DCE pointer in a1 for JIODone
|
||||
btst.b #NoQueueBit-8,(sp)+ ; check for immediate request <1.2>
|
||||
bne.s @immed ; if immediate, don't use jIODone <1.2>
|
||||
|
|
@ -1185,7 +1052,7 @@ EDiskDone2 ; <H6><SM4>
|
|||
|
||||
;_______________________________________________________________________
|
||||
;
|
||||
; Routine: HWDependent
|
||||
; Routine: HWDependent 4FC
|
||||
; Inputs: A3 - pointer to DriveQElement for specified drive
|
||||
; D0 - function selector
|
||||
; Outputs: none
|
||||
|
|
@ -1201,6 +1068,9 @@ HWDependent
|
|||
move.l HWDepProcPtr(a3),-(sp) ; get the handler address
|
||||
rts ; jump to it
|
||||
|
||||
;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
|
||||
; PowerPC Edisk Routines
|
||||
;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
|
||||
RAMDiskHandler
|
||||
move.b @decode(pc,d0.w),d0 ; get the routine offset
|
||||
jmp @decode(pc,d0.w) ; jump to it
|
||||
|
|
@ -1222,53 +1092,7 @@ RAMDiskHandler
|
|||
rts
|
||||
@checkReadOnly
|
||||
moveq.l #0,d0 ; never read only
|
||||
@enableWrites
|
||||
movem.l a0-a1/d1,-(sp) ; save registers <T5>
|
||||
moveq #8,d0 ; _EDiskProtect selector |
|
||||
move.l CheckSumPtr(a3),a0 ; put base addr of ram disk in a0 v
|
||||
move.l #0,a1 ; indicate we want to unprotect edisk
|
||||
_HwPriv ; unprotect the disk
|
||||
movem.l (sp)+,a0-a1/d1
|
||||
bclr #EDiskProtect,Flags(a3) ; indicate the disk is not protected
|
||||
rts
|
||||
@disableWrites
|
||||
movem.l a0-a1/d1,-(sp) ; save registers
|
||||
moveq #8,d0 ; _EDiskProtect selector
|
||||
move.l CheckSumPtr(a3),a0 ; put base addr of ram disk in a0
|
||||
move.l #1,a1 ; indicate we want to protect edisk
|
||||
_HwPriv ; write-protect the disk ^
|
||||
movem.l (sp)+,a0-a1/d1 ; restore registers |
|
||||
bset #EDiskProtect,Flags(a3) ; indicate the disk is protected
|
||||
rts ; <T5>
|
||||
@eject clr.b DiskInPlace(a3) ; mark it as offline
|
||||
@done rts
|
||||
|
||||
|
||||
IF newEdiskProt THEN
|
||||
;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
|
||||
; PowerPC Edisk Routines
|
||||
;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
|
||||
RAMDiskHandlerPPC
|
||||
move.b @decode(pc,d0.w),d0 ; get the routine offset
|
||||
jmp @decode(pc,d0.w) ; jump to it
|
||||
@decode
|
||||
assert (*-@decode)=CheckEDiskInserted
|
||||
dc.b @checkInserted-@decode
|
||||
assert (*-@decode)=CheckEDiskReadOnly
|
||||
dc.b @checkReadOnly-@decode
|
||||
assert (*-@decode)=EnableEDiskWrites
|
||||
dc.b @enableWrites-@decode
|
||||
assert (*-@decode)=DisableEDiskWrites
|
||||
dc.b @disableWrites-@decode
|
||||
assert (*-@decode)=EjectEDisk
|
||||
dc.b @eject-@decode
|
||||
align 2
|
||||
|
||||
@checkInserted
|
||||
moveq.l #-1,d0 ; always inserted
|
||||
rts
|
||||
@checkReadOnly
|
||||
moveq.l #0,d0 ; never read only
|
||||
@enableWrites
|
||||
; a3 = ptr to driveQElement
|
||||
; d1 = transfer length
|
||||
|
|
@ -1305,41 +1129,12 @@ RAMDiskHandlerPPC
|
|||
bset #EDiskProtect,Flags(a3) ; indicate the disk is protected
|
||||
rts ;
|
||||
|
||||
@eject clr.b DiskInPlace(a3) ; mark it as offline
|
||||
@done rts
|
||||
|
||||
ENDIF
|
||||
|
||||
ROMDiskHandler
|
||||
move.b @decode(pc,d0.w),d0 ; get the routine offset
|
||||
jmp @decode(pc,d0.w) ; jump to it
|
||||
@decode
|
||||
assert (*-@decode)=CheckEDiskInserted
|
||||
dc.b @checkInserted-@decode
|
||||
assert (*-@decode)=CheckEDiskReadOnly
|
||||
dc.b @checkReadOnly-@decode
|
||||
assert (*-@decode)=EnableEDiskWrites
|
||||
dc.b @enableWrites-@decode
|
||||
assert (*-@decode)=DisableEDiskWrites
|
||||
dc.b @disableWrites-@decode
|
||||
assert (*-@decode)=EjectEDisk
|
||||
dc.b @eject-@decode
|
||||
align 2
|
||||
|
||||
@checkInserted
|
||||
@checkReadOnly
|
||||
moveq.l #-1,d0 ; always inserted, always read only
|
||||
@enableWrites
|
||||
@disableWrites
|
||||
rts
|
||||
|
||||
@eject clr.b DiskInPlace(a3) ; mark it as offline
|
||||
@done rts
|
||||
@eject rts
|
||||
title 'EDisk Driver - EDiskPollTask - Drive Polling Task'
|
||||
|
||||
;_______________________________________________________________________
|
||||
;
|
||||
; Routine: EDiskPollTask
|
||||
; Routine: EDiskPollTask 57A
|
||||
; Inputs: A0 - address of VTask (passed by Vertical Retrace Manager)
|
||||
; Outputs: none
|
||||
; Destroys:
|
||||
|
|
@ -1352,98 +1147,9 @@ ROMDiskHandler
|
|||
;_______________________________________________________________________
|
||||
|
||||
EDiskPollTask ; a0-a3/d0-d3 saved by int handler
|
||||
lea EDiskVars-VTask(a0),a2 ; a2 := pointer to EDiskVars
|
||||
lea DrvQHdr+QHead-QLink,a3 ; get the drive queue head
|
||||
movea.l DCEpointer(a2),a1 ; get DCE pointer
|
||||
move.w dCtlRefNum(a1),d3 ; d3 := driver refnum
|
||||
|
||||
tst.b Active(a2) ; see if request in progress
|
||||
beq.s @next ; if not, start searching the drive queue
|
||||
|
||||
addq.w #1,VTask+vblCount(a2) ; if active, try again real soon
|
||||
rts ; return
|
||||
|
||||
@search movea.l d2,a3 ; a3 := DriveQElement
|
||||
cmp.w dQRefNum(a3),d3 ; see if we are the driver
|
||||
beq.s @CheckDrive ; check our drives
|
||||
@next move.l QLink(a3),d2 ; check next drive queue element
|
||||
bne.s @search ; search until end of drive queue
|
||||
|
||||
move.w #EDiskPollRate,VTask+vblCount(a2) ; re-initialize the VBL count
|
||||
rts ; return
|
||||
|
||||
|
||||
@CheckDrive
|
||||
moveq.l #CheckEDiskInserted,d0 ; hardware dependent function code
|
||||
bsr.w HWDependent ; see if disk is inserted
|
||||
addq.w #1,d0 ; ccr.x := 1 if EDisk inserted
|
||||
move.b InsertedStatus(a3),d1 ; prepare to shift in new inserted status
|
||||
addx.b d1,d1 ; shift in new inserted status
|
||||
move.b d1,InsertedStatus(a3) ; update inserted status
|
||||
moveq.l #InsertedMask,d0 ; prepare to de-bounce, and test inserted
|
||||
|
||||
and.b d0,d1 ; see if offline, without bounce
|
||||
bne.s @CheckOnLine ; if not offline, check online or bounce
|
||||
|
||||
@OffLine
|
||||
tst.b DiskInPlace(a3) ; check online status
|
||||
bpl.s @next ; if not ejecting, do nothing
|
||||
clr.b DiskInPlace(a3) ; now mark it offline (ejected)
|
||||
bra.s @next ; eject complete, check next drive
|
||||
|
||||
|
||||
@CheckOnLine
|
||||
cmp.b d0,d1 ; see if online, without bounce
|
||||
bne.s @next ; if bouncing, ignore it until it stops
|
||||
tst.b DiskInPlace(a3) ; check online status
|
||||
bmi.s @next ; if ejecting, do nothing
|
||||
beq.s @OnLine ; if was offline, and just went online
|
||||
|
||||
@mount btst.b #MountedFlag,Flags(a3) ; see if it was mounted
|
||||
bne.s @next ; if already mounted, don't do it again
|
||||
moveq.l #DiskInsertEvt,d0 ; disk inserted event (zero high word)
|
||||
movea.l d0,a0 ; disk inserted event passed in a0
|
||||
move.w DQDrive(a3),d0 ; disk drive number in low word
|
||||
_PostEvent ; post the disk inserted event
|
||||
bne.s @next ; if error, don't mark as mounted
|
||||
bset.b #MountedFlag,Flags(a3) ; mark it as mounted
|
||||
@toNext bra.s @next ; check the next drive
|
||||
|
||||
@OnLine
|
||||
@SetupDriveInfo
|
||||
move.b DiskInPlaceInit(a3),\
|
||||
DiskInPlace(a3) ; mark it as inserted
|
||||
clr.b WriteProtected(a3) ; mark it as writeable (assume RAM)
|
||||
move.l HeaderInfoPtr(a3),d0 ; see if it supports headers
|
||||
beq.s @SetupRAMDisk ; if no headers, must be a RAM based disk
|
||||
|
||||
with EDiskHeader
|
||||
movea.l d0,a0 ; a0 points to device header
|
||||
move.l HdrFormatTime(a0),\
|
||||
FormatTime(a3) ; get the unique ID from the header
|
||||
move.l HdrFormatTicks(a0),\
|
||||
FormatTicks(a3) ; get the unique ID from the header
|
||||
|
||||
; see if device is ROM or RAM
|
||||
|
||||
moveq.l #CheckEDiskReadOnly,d0 ; hardware dependent function code
|
||||
bsr.w HWDependent ; see if disk is read only
|
||||
move.b d0,WriteProtected(a3) ; setup the RAM=$00 / ROM=$FF flag
|
||||
bne.s @SetupROMDisk ; if ROM disk, all info comes from header
|
||||
|
||||
tst.l SLIMRegPtr(a3) ; see if this is a SLIM (which needs to be sized)
|
||||
beq.s @SetupRAMDisk ; if not, base and end must already be valid
|
||||
|
||||
moveq.l #EnableEDiskWrites,d0 ; hardware dependent function code
|
||||
bsr.w HWDependent ; allow writes while sizing
|
||||
bsr.w ComputeSLIMSize ; see how big the SLIM card is
|
||||
add.l a0,d0 ; compute end ptr
|
||||
move.l d0,DataEndPtr(a3) ; setup pointer to end of device data
|
||||
adda.w #EDiskHeaderSize,a0 ; point past the header
|
||||
move.l a0,CheckSumPtr(a3) ; checksums start just after the header
|
||||
moveq.l #DisableEDiskWrites,d0 ; hardware dependent function code
|
||||
bsr.w HWDependent ; no writes now
|
||||
endwith
|
||||
|
||||
@SetupRAMDisk
|
||||
movem.l CheckSumPtr(a3),d0/d1/d2; get checksum/start/end ptrs
|
||||
|
|
@ -1475,138 +1181,22 @@ EDiskPollTask ; a0-a3/d0-d3 saved by int handler
|
|||
@DriveSizeOK
|
||||
rol.l #16-9,d2 ; convert to blocks, and swap halves
|
||||
move.l d2,dqDrvSz(a3) ; fill in the drive size (in blocks)
|
||||
bra.w @mount ; now mount the drive
|
||||
|
||||
Mount btst.b #MountedFlag,Flags(a3) ; see if it was mounted
|
||||
bne.s @done ; if already mounted, don't do it again
|
||||
moveq.l #DiskInsertEvt,d0 ; disk inserted event (zero high word)
|
||||
movea.l d0,a0 ; disk inserted event passed in a0
|
||||
move.w DQDrive(a3),d0 ; disk drive number in low word
|
||||
_PostEvent ; post the disk inserted event
|
||||
bne.s @done ; if error, don't mark as mounted
|
||||
bset.b #MountedFlag,Flags(a3) ; mark it as mounted
|
||||
|
||||
@SetupROMDisk
|
||||
move.l a0,d0 ; remember header address
|
||||
lea HeaderTemplate,a1 ; point to expected values
|
||||
with EDiskHeader
|
||||
lea HdrBlockSize(a0),a0 ; point to header data
|
||||
moveq.l #(HdrDeviceSize-HdrBlockSize)/4-1,d2 ; loop counter
|
||||
@cmpLoop
|
||||
cmpm.l (a0)+,(a1)+ ; compare the values
|
||||
dbne d2,@cmpLoop ; compare the blocks
|
||||
beq.s @SigOK ; get header info if signature valid
|
||||
|
||||
move.l d0,d1 ; start ptr is header ptr
|
||||
move.l d1,d2 ; end ptr is start ptr
|
||||
bra.s @UpdateBasePtrs ; create an empty ROM disk (pretty useless)
|
||||
|
||||
@SigOK move.l (a0)+,d0 ; get device size
|
||||
addq.w #HdrCheckSumOff-HdrFormatTime,a0 ; point to checksum offset in header
|
||||
lea CheckSumPtr(a3),a1 ; point to checksum ptr in drive info
|
||||
|
||||
moveq.l #(HdrMediaIconOff-\
|
||||
HdrCheckSumOff)/4-1,d2 ; loop for next 3 fields
|
||||
|
||||
tst.l SLIMRegPtr(a3) ; see if this is a SLIM (which is ejectable)
|
||||
bne.s @offsetLoop ; if ejectable, don't get the icon info
|
||||
|
||||
moveq.l #(HdrDriveInfo-\
|
||||
HdrCheckSumOff)/4-1,d2 ; loop for next 6 fields
|
||||
|
||||
move.l HdrDriveInfo-HdrCheckSumOff(a0),d1 ; get drive info
|
||||
beq.s @offsetLoop ; if none specified, use default
|
||||
move.l d1,DriveInfo(a3) ; setup new drive info
|
||||
@offsetLoop
|
||||
addq.l #4,a1 ; leave pointer alone, assume default
|
||||
move.l (a0)+,d1 ; get the offset
|
||||
beq.s @nextOffset ; if none, ignore it
|
||||
cmp.l d0,d1 ; see if offset is reasonable
|
||||
bhi.s @nextOffset ; if offset past end of device, ignore it
|
||||
add.l HeaderInfoPtr(a3),d1 ; add device base to offset
|
||||
move.l d1,-4(a1) ; update the pointer
|
||||
@nextOffset
|
||||
dbra d2,@offsetLoop ; loop through all of the fields
|
||||
|
||||
movem.l DataStartPtr(a3),d1/d2 ; get start/end ptrs
|
||||
bra.s @SetupDriveSize ; setup the drive queue size info
|
||||
endwith
|
||||
title 'EDisk Driver - ComputeSLIMSize - Get Signature Information'
|
||||
|
||||
;_______________________________________________________________________
|
||||
;
|
||||
; Routine: ComputeSLIMSize
|
||||
; Inputs: A0 - pointer to base of SLIM address space for this card
|
||||
; Outputs: D0 - Device Size in bytes
|
||||
; Destroys: A1, D1, D2
|
||||
; Calls: none
|
||||
; Called by:
|
||||
;
|
||||
; Function: Returns the device size for the specified SLIM card.
|
||||
;
|
||||
;_______________________________________________________________________
|
||||
|
||||
SegmentSize equ 512*1024 ; slims have up to 4 512K byte segments
|
||||
|
||||
ComputeSLIMSize
|
||||
adda.l #4*SegmentSize,a0 ; point past end of last segment
|
||||
movea.l a0,a1 ; save copy of end address
|
||||
moveq.l #%0000,d0 ; assume all 4 segments are missing
|
||||
move.l #'Gary',d1 ; rotating pattern
|
||||
moveq.l #4-1,d2 ; loop counter
|
||||
@FillLoop
|
||||
suba.l #SegmentSize,a0 ; point to base of previous segment
|
||||
move.l (a0),-(sp) ; save the old contents
|
||||
rol.l #8,d1 ; change the pattern
|
||||
move.l d1,(a0) ; write to the ram
|
||||
cmp.l (a0),d1 ; see if we can read it back
|
||||
bne.s @NotRAM1 ; if not, it's not RAM
|
||||
not.l d1 ; complement the pattern
|
||||
move.l d1,(a0) ; write to the ram
|
||||
cmp.l (a0),d1 ; see if we can read it back
|
||||
bne.s @NotRAM2 ; if not, it's not RAM
|
||||
bset.l d2,d0 ; indicate that the segment is RAM
|
||||
@NotRAM2
|
||||
not.l d1 ; restore pattern
|
||||
@NotRAM1
|
||||
dbra d2,@FillLoop ; loop through all 4 segments
|
||||
|
||||
not.l d1 ; get expected pattern
|
||||
moveq.l #4-1,d2 ; loop counter
|
||||
@CheckLoop
|
||||
suba.l #SegmentSize,a1 ; point to base of previous segment
|
||||
rol.l #8,d1 ; change the pattern
|
||||
cmp.l (a1),d1 ; see if we can read it back
|
||||
beq.s @IsRAM ; if so, it's RAM that didn't wrap around
|
||||
bclr.l d2,d0 ; indicate that the segment isn't RAM
|
||||
@IsRAM
|
||||
dbra d2,@CheckLoop ; loop through all 4 segments
|
||||
|
||||
moveq.l #4-1,d2 ; loop counter
|
||||
@RestoreLoop
|
||||
move.l (sp)+,(a1) ; restore the old contents
|
||||
adda.l #SegmentSize,a1 ; point to base of next segment
|
||||
dbra d2,@RestoreLoop ; loop through all 4 segments
|
||||
|
||||
move.b @SizesTable(d0.w),d0 ; encode the segment present bits
|
||||
moveq.l #19,d1 ; shift amount
|
||||
lsl.l d1,d0 ; convert segment count to byte count
|
||||
rts ; all done
|
||||
|
||||
@SizesTable
|
||||
dc.b 0 ; 0000 - RAM, 0.0MB, 0 segments
|
||||
dc.b 1 ; 0001 - RAM, 0.5MB, 1 segment
|
||||
dc.b 0 ; 0010 - RAM, illegal configuration
|
||||
dc.b 2 ; 0011 - RAM, 1.0MB, 2 segments
|
||||
dc.b 0 ; 0100 - RAM, illegal configuration
|
||||
dc.b 0 ; 0101 - RAM, illegal configuration
|
||||
dc.b 0 ; 0110 - RAM, illegal configuration
|
||||
dc.b 3 ; 0111 - RAM, 1.5MB, 3 segments
|
||||
dc.b 0 ; 1000 - RAM, illegal configuration
|
||||
dc.b 0 ; 1001 - RAM, illegal configuration
|
||||
dc.b 0 ; 1010 - RAM, illegal configuration
|
||||
dc.b 0 ; 1011 - RAM, illegal configuration
|
||||
dc.b 0 ; 1100 - RAM, illegal configuration
|
||||
dc.b 0 ; 1101 - RAM, illegal configuration
|
||||
dc.b 0 ; 1110 - RAM, illegal configuration
|
||||
dc.b 4 ; 1111 - RAM, 2.0MB, 4 segments
|
||||
@done rts
|
||||
title 'EDisk Driver - CreateEDiskHeader - Create Header Information'
|
||||
|
||||
;_______________________________________________________________________
|
||||
;
|
||||
; Routine: CreateEDiskHeader
|
||||
; Routine: CreateEDiskHeader 5E0
|
||||
; Inputs: A3 - pointer to Drive Queue Element for specified drive
|
||||
; Destroys: A0, A1, D0, D1, D2, D3
|
||||
; Calls: none
|
||||
|
|
@ -1671,29 +1261,12 @@ HeaderTemplate
|
|||
|
||||
string pascal ; name strings have leading length byte
|
||||
|
||||
IF not padForOverPatch THEN ; removing string to adjust for mods <H1>
|
||||
align 2
|
||||
SlimDrive0Name
|
||||
dc.b 'Upper SLIM Drive'
|
||||
ENDIF
|
||||
|
||||
align 2
|
||||
SlimDrive1Name
|
||||
dc.b 'Lower SLIM Drive'
|
||||
|
||||
align 2
|
||||
ROMDiskName
|
||||
dc.b 'Internal ROM Disk'
|
||||
|
||||
align 2
|
||||
RAMDiskName
|
||||
dc.b 'Internal RAM Disk'
|
||||
|
||||
align 2
|
||||
title 'EDisk Driver - RAM / ROM Disk Icons'
|
||||
|
||||
ROMDiskMediaIcon
|
||||
ROMDiskDriveIcon
|
||||
title 'EDisk Driver - RAM Disk Icons'
|
||||
|
||||
RAMDiskMediaIcon
|
||||
RAMDiskDriveIcon
|
||||
|
|
|
|||
Loading…
Reference in New Issue