2 ** Sample autoboot code fragment
4 ** These are the calling conventions for the Diag routine
6 ** A7 -- points to at least 2K of stack
9 ** A3 -- your board's ConfigDev structure
10 ** A2 -- Base of diag/init area that was copied
11 ** A0 -- Base of your board
13 ** Your Diag routine should return a non-zero value in D0 for success.
14 ** If this value is NULL, then the diag/init area that was copied
15 ** will be returned to the free memory pool.
18 INCLUDE "exec/types.i"
19 INCLUDE "exec/nodes.i"
20 INCLUDE "exec/resident.i"
21 INCLUDE "libraries/configvars.i"
23 ; LVO's resolved by linking with library amiga.lib
29 * ROMINFO defines whether you want the AUTOCONFIG information in
30 * the beginning of your ROM (set to 0 if you instead have PALS
31 * providing the AUTOCONFIG information instead)
33 * ROMOFFS is the offset from your board base where your ROMs appear.
34 * Your ROMs might appear at offset 0 and contain your AUTOCONFIG
35 * information in the high nibbles of the first $40 words ($80 bytes).
36 * Or, your autoconfig ID information may be in a PAL, with your
37 * ROMs possibly being addressed at some offset (for example $2000)
38 * from your board base. This ROMOFFS constant will be used as an
39 * additional offset from your configured board address when patching
40 * structures which require absolute pointers to ROM code or data.
42 *----- We'll store Version and Revision in serial number
43 VERSION EQU 37 ; also the high word of serial number
44 REVISION EQU 1 ; also the low word of serial number
46 * See the Addison-Wesley Amiga Hardware Manual for more info.
48 MANUF_ID EQU 2011 ; CBM assigned (2011 for hackers only)
49 PRODUCT_ID EQU 1 ; Manufacturer picks product ID
51 BOARDSIZE EQU $10000 ; How much address space board decodes
52 SIZE_FLAG EQU 3 ; Autoconfig 3-bit flag for BOARDSIZE
53 ; 0=$800000(8meg) 4=$80000(512K)
54 ; 1=$10000(64K) 5=$100000(1meg)
55 ; 2=$20000(128K) 6=$200000(2meg)
56 ; 3=$40000(256K) 7=$400000(4meg)
72 PiSCSIAddr1 EQU $80000010
73 PiSCSIDebugMe EQU $80000020
74 PiSCSIDriver EQU $80000040
75 PiSCSINextPart EQU $80000044
76 PiSCSIGetPart EQU $80000048
77 PiSCSIGetPrio EQU $8000004C
79 ******* RomStart ***************************************************
80 **********************************************************************
84 ******* DiagStart **************************************************
85 DiagStart: ; This is the DiagArea structure whose relative offset from
86 ; your board base appears as the Init Diag vector in your
87 ; autoconfig ID information. This structure is designed
88 ; to use all relative pointers (no patching needed).
89 dc.b DAC_WORDWIDE+DAC_CONFIGTIME ; da_Config
92 dc.w DiagEntry-DiagStart ; da_DiagPoint
93 dc.w BootEntry-DiagStart ; da_BootPoint
94 dc.w DevName-DiagStart ; da_Name
95 dc.w 0 ; da_Reserved01
96 dc.w 0 ; da_Reserved02
98 ******* Resident Structure *****************************************
100 dc.w RTC_MATCHWORD ; UWORD RT_MATCHWORD
101 rt_Match: dc.l Romtag-DiagStart ; APTR RT_MATCHTAG
102 rt_End: dc.l EndCopy-DiagStart ; APTR RT_ENDSKIP
103 dc.b RTW_COLDSTART ; UBYTE RT_FLAGS
104 dc.b VERSION ; UBYTE RT_VERSION
105 dc.b NT_DEVICE ; UBYTE RT_TYPE
106 dc.b 20 ; BYTE RT_PRI
107 rt_Name: dc.l DevName-DiagStart ; APTR RT_NAME
108 rt_Id: dc.l IdString-DiagStart ; APTR RT_IDSTRING
109 rt_Init: dc.l Init-RomStart ; APTR RT_INIT
112 ******* Strings referenced in Diag Copy area ************************
113 DevName: dc.b 'pi-scsi.device',0,0 ; Name string
114 IdString dc.b 'PISCSI v0.8',0 ; Id string
116 DosName: dc.b 'dos.library',0 ; DOS library name
117 ExpansionName: dc.b "expansion.library",0
118 LibName: dc.b "pi-scsi.device",0,0
120 DosDevName: dc.b 'ABC',0 ; dos device name for MakeDosNode()
121 ; (dos device will be ABC:)
125 ******* DiagEntry **************************************************
126 **********************************************************************
128 * success = DiagEntry(BoardBase,DiagCopy, configDev)
131 * Called by expansion architecture to relocate any pointers
132 * in the copied diagnostic area. We will patch the romtag.
133 * If you have pre-coded your MakeDosNode packet, BootNode,
134 * or device initialization structures, they would also need
135 * to be within this copy area, and patched by this routine.
137 **********************************************************************
144 move.l #1,PiSCSIDebugMe
145 move.l a3,PiSCSIAddr1
153 lea patchTable-RomStart(a0),a1 ; find patch table
154 adda.l #ROMOFFS,a1 ; adjusting for ROMOFFS
156 * Patch relative pointers to labels within DiagCopy area
157 * by adding Diag RAM copy address. These pointers were coded as
158 * long relative offsets from base of the DiagArea structure.
161 move.l a2,d1 ;d1=base of ram Diag copy
163 move.w (a1)+,d0 ;d0=word offs. into Diag needing patch
164 bmi.s bpatches ;-1 is end of word patch offset table
165 add.l d1,0(a2,d0.w) ;add DiagCopy addr to coded rel. offset
168 * Patches relative pointers to labels within the ROM by adding
169 * the board base address + ROMOFFS. These pointers were coded as
170 * long relative offsets from RomStart.
173 move.l a0,d1 ;d1 = board base address
174 add.l #ROMOFFS,d1 ;add offset to where your ROMs are
176 move.w (a1)+,d0 ;d0=word offs. into Diag needing patch
177 bmi.s endpatches ;-1 is end of patch offset table
178 add.l d1,0(a2,d0.w) ;add ROM address to coded relative offset
182 moveq.l #1,d0 ; indicate "success"
186 ******* BootEntry **************************************************
187 **********************************************************************
191 move.l #2,PiSCSIDebugMe
198 lea DosName(PC),a1 ; 'dos.library',0
199 jsr FindResident(a6) ; find the DOS resident tag
200 move.l d0,a0 ; in order to bootstrap
201 move.l RT_INIT(A0),a0 ; set vector to DOS INIT
202 jsr (a0) ; and initialize DOS
206 * End of the Diag copy area which is copied to RAM
209 *************************************************************************
211 *************************************************************************
213 * Beginning of ROM driver code and data that is accessed only in
214 * the ROM space. This must all be position-independent.
218 * Word offsets into Diag area where pointers need Diag copy address added
219 dc.w rt_Match-DiagStart
220 dc.w rt_End-DiagStart
221 dc.w rt_Name-DiagStart
225 * Word offsets into Diag area where pointers need boardbase+ROMOFFS added
226 dc.w rt_Init-DiagStart
229 ******* Romtag InitEntry **********************************************
230 *************************************************************************
232 Init: ; After Diag patching, our romtag will point to this
233 ; routine in ROM so that it can be called at Resident
234 ; initialization time.
235 ; This routine will be similar to a normal expansion device
236 ; initialization routine, but will MakeDosNode then set up a
237 ; BootNode, and Enqueue() on eb_MountList.
240 move.l a6,-(a7) ; Push A6 to stack
241 ;move.w #$00B8,$dff09a ; Disable interrupts during init
242 move.l #3,PiSCSIDebugMe
244 move.l #11,PiSCSIDebugMe
248 move.l #10,PiSCSIDebugMe
250 bne.s SkipDriverLoad ; Library is already loaded, jump straight to partitions
252 move.l #4,PiSCSIDebugMe
256 jsr AllocMem(a6) ; Allocate memory for the PiStorm to copy the driver to
258 move.l d0,PiSCSIDriver ; Copy the PiSCSI driver to allocated memory and patch offsets
260 move.l #5,PiSCSIDebugMe
265 jsr InitResident(a6) ; Initialize the PiSCSI driver
268 lea ExpansionName(pc),a1
270 jsr OpenLibrary(a6) ; Open expansion.library to make this work, somehow
274 move.l #9,PiSCSIDebugMe
275 move.l PiSCSIGetPart,d0 ; Get the available partition in the current slot
276 beq.s EndPartitions ; If the next partition returns 0, there's no additional partitions
279 move.l #7,PiSCSIDebugMe
281 move.l PiSCSIGetPrio,d0
283 move.l PiSCSIAddr1,a1
285 move.l #8,PiSCSIDebugMe
286 move.l #1,PiSCSINextPart ; Switch to the next partition
294 move.l #6,PiSCSIDebugMe
296 move.l (a7)+,a6 ; Pop A6 from stack
298 ;move.w #$80B8,$dff09a ; Re-enable interrupts
299 moveq.l #1,d0 ; indicate "success"