mirror of
https://github.com/elliotnunn/NetBoot.git
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New state-machine-based boot somewhat works
(For requests under 32b)
This commit is contained in:
Elliot Nunn
parent
286ca935bf
commit
4a44f288c0
@ -200,7 +200,7 @@ while 1:
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# // while others are stored on disk by the boot server
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# typedef struct
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# {
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# char serverName[serverNameLength]; // server name to boot off of
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# char serverName[serverNameLength]; // server name to boot off of
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# char serverZone[zoneNameLength]; // and the zone it lives in
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# char serverVol[volNameLength]; // the volume name
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# short serverAuthMeth; // authentication method to use (none, clear txt, rand)
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@ -279,7 +279,7 @@ while 1:
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# break # wait for another request, you mofo!
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elif boot_type == 128:
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boot_seq, boot_blkoffset, boot_blkcnt, boot_imgname = struct.unpack_from('>HLL32p', data)
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boot_seq, boot_blkoffset, boot_blkcnt = struct.unpack_from('>HLL', data); boot_imgname = b'A608.dsk'
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boot_imgname = boot_imgname.decode('mac_roman')
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for blk in range(boot_blkoffset, boot_blkoffset + boot_blkcnt):
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thisblk = image2dict[boot_imgname][blk*512:blk*512+512]
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@ -287,7 +287,7 @@ while 1:
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dest_node=llap_src_node, dest_socket=ddp_src_socket,
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src_node=99, src_socket=99,
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proto_type=10,
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data=struct.pack('>BBHL', 129, 1, boot_seq, blk-boot_blkoffset) + thisblk
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data=struct.pack('>BBH', 129, blk-boot_blkoffset, boot_seq) + thisblk
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),
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(MCAST_ADDR, MCAST_PORT))
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314
ChainLoader.a
314
ChainLoader.a
@ -1,6 +1,8 @@
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myUnitNum equ 52
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myDRefNum equ ~myUnitNum
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serverBufSize equ 32
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Code
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cmp.l #1,4(SP)
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@ -41,14 +43,14 @@ getBootBlocks
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move.w D0,7(A0) ; network
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; Patch the disk image name and size into the DRVR code
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bsr BootPicker ; A0 = pstring ptr
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lea gNumBlks-DrvrBase(A2),A1
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move.l -4(A0),(A1) ; the size is underneath the pstring ptr
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move.l -4(A0),D6 ; D6 = block count, needed for DQE
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lea gQFilename-DrvrBase(A2),A1 ; A1 = dest
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moveq.l #1,D0
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add.b (A0),D0
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dc.w $A22E ; _BlockMoveData
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; bsr BootPicker ; A0 = pstring ptr
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; lea gNumBlks-DrvrBase(A2),A1
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; move.l -4(A0),(A1) ; the size is underneath the pstring ptr
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; move.l -4(A0),D6 ; D6 = block count, needed for DQE
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; lea gQFilename-DrvrBase(A2),A1 ; A1 = dest
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; moveq.l #1,D0
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; add.b (A0),D0
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; dc.w $A22E ; _BlockMoveData
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; Install the driver in the unit table
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move.l #myDRefNum,D0
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@ -262,14 +264,10 @@ DrvrBase
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g
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gNumBlks dc.l 0 ; the source of all truth
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gMyDCE dc.l 0
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gQuery
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gQTypeVer dc.w 0 ; part of gQuery
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gQSeqNum dc.w 0 ; part of gQuery
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gQOffset dc.l 0 ; part of gQuery: block offset
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gQLen dc.l 0 ; part of gQuery: block count
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gQFilename dcb.b 32 ; part of gQuery ; set by the init code
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gQueryEnd
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gWDS dcb.b 2+4+2+4+2
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gExpectHdr dc.l 0
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gProgress dc.l 0
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gQuery dcb.b 20 ; really need to consider the length of this!
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gWDS dcb.b 2+4+2+4+2+4+2 ; room for an address and two data chunks
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gMyPB dcb.b $32+2 ; allow us to clear it with move.l's
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odd
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gSaveAddr dcb.b 16
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@ -304,55 +302,72 @@ DrvrPrime
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ror.l #5,D0
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move.l D0,$2E(A0) ; ioPosOffset = D0 = byte_offset/512
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; Increment the protocol sequence counter.
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lea gQSeqNum,A2
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addq.w #1,(A2)
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; Kick the state machine.
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movem.l A0-A1,-(SP)
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bsr.s DrvrTransmitRequest ; takes A0 as PB argument
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movem.l (SP)+,A0-A1
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; Return with a "pending" ioResult.
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move.w #1,$10(A0) ; ioResult = pending. We will return without an answer.
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rts
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; Wang the state machine!
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cmp.b #2,7(A0) ; ioTrap == _Read?
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bne DrvrSendWrite ; transition from "Idle" to "Await Comp Send Write Packet"
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bra DrvrSendRead ; transition from "Idle" to "Await Comp Send Read Packet"
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DrvrTransmitRequest ; On entry, A0=pb. Trashes A0-A4/D0 so be careful. Uses our globals extensively.
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lea g,A2
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move.b gSaveAddr-g(A2),gAddr-g(A2) ; reasonable way to copy the address struct, I guess
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move.l gSaveAddr-g+1(A2),gAddr-g+1(A2)
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move.l gSaveAddr-g+5(A2),gAddr-g+5(A2)
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move.l gSaveAddr-g+9(A2),gAddr-g+9(A2)
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move.w gSaveAddr-g+13(A2),gAddr-g+13(A2)
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move.b gSaveAddr-g+15(A2),gAddr-g+15(A2)
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move.w #$8001,gQTypeVer-g(A2) ; Means a polite request, v1
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; Some wrappers for the routines below...
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DrvrSendRead
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; Called from Prime routine: PB/DCE in A0/A1 must be preserved
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lea gExpectHdr+2,A2
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addq.w #1,(A2) ; packet filter sequence word
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lea gProgress,A2
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clr.l (A2)
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lea gSaveAddr,A2
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lea gAddr,A3
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move.b (A2)+,(A3)+ ; copy the address struct, dang it!
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move.l (A2)+,(A3)+
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move.l (A2)+,(A3)+
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move.l (A2)+,(A3)+
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move.w (A2)+,(A3)+
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move.b (A2)+,(A3)+
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lea gQuery,A2
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move.w #$8000,(A2)+ ; Means a polite request
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move.w gExpectHdr+2,(A2)+
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move.l $28(A0),D0 ; [ioActCount (in bytes)
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lsr.l #4,D0
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lsr.l #5,D0 ; / 512]
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add.l $2E(A0),D0 ; + ioPosOffset (in blocks)
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move.l D0,gQOffset-g(A2) ; -> "offset" field of request
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move.l D0,(A2)+ ; -> "offset" field of request
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move.l $24(A0),D0 ; [ioReqCount (in bytes)
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sub.l $28(A0),D0 ; - ioActCount (in bytes)]
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lsr.l #4,D0
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lsr.l #5,D0 ; / 512
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move.l D0,gQLen-g(A2) ; -> "length" field of request
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move.l D0,(A2)+ ; -> "length" field of request
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lea gAddr,A3
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clr.w gWDS-g(A2) ; WDS+0 reserved field
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move.l A3,gWDS-g+2(A2) ; WDS+2 pointer to address struct
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lea gQuery,A3
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move.w #gQueryEnd-gQuery,gWDS-g+6(A2) ; WDS+6 length of second entry
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move.l A3,gWDS-g+8(A2) ; WDS+8 pointer to second entry
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clr.w gWDS-g+12(A2) ; WDS+10 zero to end the list
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lea gWDS,A2
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clr.w (A2)+ ; WDS+0: reserved field
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pea gAddr
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move.l (SP)+,(A2)+ ; WDS+2: pointer to address struct
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move.w #12,(A2)+ ; WDS: push pointer/length
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pea gQuery
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move.l (SP)+,(A2)+
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clr.w (A2)+ ; WDS: end with zero
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move.l A0,-(SP)
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lea gMyPB,A0
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.retry
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bsr DrvrClearBlock
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pea DrvrDidSendRead
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move.l (SP)+,$C(A0) ; ioCompletion
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move.w #-10,$18(A0) ; ioRefNum = .MPP
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move.w #246,$1A(A0) ; csCode = writeDDP
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move.b #10,$1C(A0) ; socket = 10 (hardcoded)
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@ -360,25 +375,40 @@ DrvrTransmitRequest ; On entry, A0=pb. Trashes A0-A4/D0 so be careful. Uses our
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pea gWDS
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move.l (SP)+,$1E(A0) ; wdsPointer to our WriteDataStructure
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dc.w $A404 ; _Control ,async
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cmp.w #-91,$10(A0) ; This happens when the RAM MPP replaces the ROM one
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bne.s .noNeedToRetry ; so we need to reopen socket #10, then retry...
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bsr DrvrClearBlock
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move.w #-10,$18(A0) ; ioRefNum = .MPP
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move.w #248,$1A(A0) ; csCode = openSkt
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move.b #10,$1C(A0) ; socket = 10 (hardcoded)
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pea DrvrSockListener
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move.l (SP)+,$1E(A0) ; listener
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dc.w $A004 ; _Control (synchronous, better hope it doesn't deadlock!)
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bra.s .retry
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.noNeedToRetry
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move.w $10(A0),D0 ; for our caller to figure out what went wrong
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move.l (SP)+,A0
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rts
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DrvrDidSendRead
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; Called as completion routine: PB/result in A0/D0, must preserve all registers other than A0/A1/D0-D2
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lea gExpectHdr,A2
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move.w #$8100,(A2) ; Enable packet reception
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rts ; TODO: set up a timeout/retry task
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DrvrSendFirstWrite
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; yech...
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; fall through...
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DrvrSendWrite
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nop
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DrvrDidSendWrite
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nop
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DrvrClearBlock
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move.w #$32/2-1,D0
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.loop clr.w (A0)+
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@ -386,87 +416,123 @@ DrvrClearBlock
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lea -$32(A0),A0
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rts
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DrvrSockListener ; works closely with the Prime routine
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; A0 Reserved for internal use by the .MPP driver. You must preserve this register until after the ReadRest routine has completed execution.
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; A1 Reserved for internal use by the .MPP driver. You must preserve this register until after the ReadRest routine has completed execution.
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; A2 Pointer to the .MPP driver's local variables. Elliot says: the frame and packet header ("RHA") are at offset 1 from A2 (keeps the 2-byte fields aligned)
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; A3 Pointer to the first byte in the RHA past the DDP header bytes (the first byte after the DDP protocol type field).
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; A4 Pointer to the ReadPacket routine. The ReadRest routine starts 2 bytes after the start of the ReadPacket routine.
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; A5 Free for your use before and until your socket listener calls the ReadRest routine.
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; D0 Lower byte is the destination socket number of the packet.
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; D1 Word indicating the number of bytes in the DDP packet left to be read (that is, the number of bytes following the DDP header).
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; D2 Free for your use.
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; D3 Free for your use.
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DrvrSockListener
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; Registers on call to DDP socket listener:
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; A0 Reserved for internal use by the .MPP driver. You must preserve this register
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; until after the ReadRest routine has completed execution.
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; A1 Reserved for internal use by the .MPP driver. You must preserve this register
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; until after the ReadRest routine has completed execution.
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; A2 Pointer to the .MPP driver's local variables. Elliot says: the frame and packet
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; header ("RHA") are at offset 1 from A2 (keeps the 2-byte fields aligned)
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; A3 Pointer to the first byte in the RHA past the DDP header bytes (the first byte
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; after the DDP protocol type field).
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; A4 Pointer to the ReadPacket routine. The ReadRest routine starts 2 bytes after the
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; start of the ReadPacket routine.
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; A5 Free for your use before and until your socket listener calls the ReadRest routine.
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; D0 Lower byte is the destination socket number of the packet.
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; D1 Word indicating the number of bytes in the DDP packet left to be read (that is,
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; the number of bytes following the DDP header).
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; D2 Free for your use.
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; D3 Free for your use.
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; Registers on entry to the ReadPacket routine
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; A3 Pointer to a buffer to hold the data you want to read
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; D3 Number of bytes to read; must be nonzero
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; Registers on exit from the ReadPacket routine
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; A0 Unchanged
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; A1 Unchanged
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; A2 Unchanged
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; A3 Address of the first byte after the last byte read into buffer
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; A4 Unchanged
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; D0 Changed
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; D1 Number of bytes left to be read
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; D2 Unchanged
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; D3 Equals 0 if requested number of bytes were read, nonzero if error
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; Registers on entry to the ReadRest routine
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; A3 Pointer to a buffer to hold the data you want to read
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; D3 Size of the buffer (word length); may be 0
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; Registers on exit from the ReadRest routine
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; A0 Unchanged
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; A1 Unchanged
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; A2 Unchanged
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; A3 Pointer to first byte after the last byte read into buffer
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; D0 Changed
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; D1 Changed
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; D2 Unchanged
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; D3 Equals 0 if requested number of bytes exactly equaled the size of the buffer;
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; less than 0 if more data was left than would fit in buffer (extra data equals
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; -D3 bytes); greater than 0 if less data was left than the size of the buffer
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; (extra buffer space equals D3 bytes)
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; cmp.b #10,-1(A3) ; DDP protocol type better be ATBOOT
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; bne.s DrvrTrashPacket
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moveq.l #4,D3
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jsr (A4) ; Read the nice short packet header
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move.l -4(A3),D0
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if 0
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lea gExpectHdr,A5 ; Check the packet header
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move.l (A5),D1
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eor.l D0,D1
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swap D1
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clr.b D1
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bne.s DrvrTrashPacket
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endif
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btst #25,D0
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bne.s DrvrDidReceiveWrite
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DrvrDidReceiveRead
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swap D0 ; Confirm that this packet is not a dupe
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and.w #32-1,D0
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lea gProgress,A5
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move.l (A5),D2
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bset.l D0,D2
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bne.s DrvrTrashPacket
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move.l D2,(A5)
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move.l gMyDCE,A5
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btst.b #7,5(A5) ; Check drvrActive flag (is there an outstanding request?)
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beq .trashpacket
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cmp.b #10,-1(A3) ; DDP protocol type better be ATBOOT
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bne.s .trashpacket
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moveq.l #8,D3
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jsr (A4) ; Read 8 bytes
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cmp.w #$8101,-8(A3) ; Check protocol and version
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bne.s .trashpacket
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lea gQSeqNum,A5 ; Check packet sequence number
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move.w (A5),D2
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cmp.w -6(A3),D2
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bne.s .trashpacket
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move.l gMyDCE,A5 ; Get current param block
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move.l 6+2(A5),A5 ; dCtlQHdr.qHead
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move.l $28(A5),D2 ; keep this in D2 because we will use it in a sec
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move.l -4(A3),D3
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lsl.l #4,D3
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lsl.l #5,D3
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cmp.l D3,D2 ; ioActCount = this offset?
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bne.s .outoforder
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move.l $28(A5),D2 ; increment ioActCount, check ioReqCount
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add.l #512,D2
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move.l D2,$28(A5)
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sub.l $24(A5),D2 ; D2 gets saved across the coming ReadRest call
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move.l $20(A5),A3 ; ioBuffer
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add.l D2,A3 ; A3 = ioBuffer + ioReqDone
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move.l #512,D3 ; D3 = bytes to read = 512
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add.l D3,D2 ; D2 = new ioReqDone = old ioReqDone + 512
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jsr 2(A4) ; ReadRest
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; From this point on, use A1 instead of A5
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asl.w #5,D0
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asl.w #4,D0
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add.w D0,A3 ; A3 = ioBuffer + thisPackOffset
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move.l #512,D3 ; D3 = size
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jsr 2(A4) ; ReadRest!
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move.l gMyDCE,A1 ; Get current param block
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move.l 6+2(A1),A1 ; dCtlQHdr.qHead
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tst.l D2
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beq.s .ioDone
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rts
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move.l D2,$28(A1) ; update ioActCount
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cmp.l $24(A1),D2 ; does it equal ioReqCount?
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bne.s .rts
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lea gMyDCE,A1
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move.l (A1),A1
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.ioDone lea gExpectHdr,A1
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clr.w (A1)
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move.l gMyDCE,A1
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moveq.l #0,D0
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move.l $8FC,A0 ; jIODone (D0 = result, A1 = DCE)
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jmp (A0)
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.outoforder ; apparent dropped packet, so please resend
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moveq.l #0,D3
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jsr 2(A4) ; ReadRest nothing
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movem.l A0-A4,-(SP)
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move.l gMyDCE,A0 ; Get current param block
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move.l 6+2(A0),A0 ; dCtlQHdr.qHead
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bsr DrvrTransmitRequest
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movem.l (SP)+,A0-A4
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DrvrDidReceiveWrite
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bsr DrvrDidReceiveWrite
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rts
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.trashpacket
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DrvrTrashPacket
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moveq.l #0,D3
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jmp 2(A4) ; ReadRest nothing
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.rts
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rts
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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DrvrControl
|
||||
@ -503,7 +569,7 @@ status_fmtLstCode ; tell them about our size
|
||||
status_drvStsCode ; tell them about some of our flags
|
||||
move.w #0,$1C(A0) ; csParam[0..1] = track no (0)
|
||||
move.l #$80080000,$1C+2(A0) ; csParam[2..5] = same flags as dqe
|
||||
|
||||
|
||||
move.w #0,$10(A0) ; ioResult = noErr
|
||||
bra DrvrFinish
|
||||
|
||||
|
||||
@ -90,26 +90,20 @@ while 1:
|
||||
print('malformed short packet %r' % data.hex())
|
||||
continue
|
||||
boot_type, boot_vers = struct.unpack_from('>BB', data)
|
||||
data = data[2:]
|
||||
|
||||
if boot_type == 1:
|
||||
print(' ATBOOT "syn"', data.hex())
|
||||
print(' ATBOOT "syn"', data[2:].hex())
|
||||
elif boot_type == 2:
|
||||
print(' ATBOOT "ack"', data.hex())
|
||||
print(' ATBOOT "ack"', data[2:].hex())
|
||||
elif boot_type == 3:
|
||||
print(' ATBOOT image request', data.hex())
|
||||
print(' ATBOOT image request', data[2:].hex())
|
||||
elif boot_type == 4:
|
||||
print(' ATBOOT image reply', data.hex())
|
||||
elif boot_type == 128:
|
||||
a, b, c, d = struct.unpack_from('>HLL32p', data)
|
||||
d = d.decode('mac_roman')
|
||||
print(f' ATBOOT Elliot block seq={hex(a)} blkIdx={hex(b)} byteLen={hex(c)} img={repr(d)}')
|
||||
elif boot_type == 129:
|
||||
a, b = struct.unpack_from('>HL', data)
|
||||
print(f' ATBOOT Elliot reply seq={hex(a)} relByteIdx={hex(b)}')
|
||||
print(' ATBOOT image reply', data[2:].hex())
|
||||
elif boot_type >= 0x80:
|
||||
print(' ATBOOT Elliot', data.hex())
|
||||
else:
|
||||
print(' ATBOOT', boot_type, boot_vers, data.hex())
|
||||
print(' ATBOOT ???', boot_type, boot_vers, data[2:].hex())
|
||||
|
||||
else:
|
||||
print('Totally unknown DDP type', ddp_proto_type)
|
||||
print('Totally unknown DDP type', ddp_proto_type)
|
||||
print(' ' + data.hex())
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user