URL https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk

Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [gen68360/] [start/] [start.S] - Blame information for rev 493

Go to most recent revision | Details | Compare with Previous | View Log


/*
 *
 *  This file contains the entry point for the application.
 *  It jumps to the BSP which is responsible for performing
 *  all initialization.
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may in
 *  the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 * Based on the `gen68302' board support package, and covered by the
 * original distribution terms.
 *
 * W. Eric Norum
 * Saskatchewan Accelerator Laboratory
 * University of Saskatchewan
 * Saskatoon, Saskatchewan, CANADA
 * eric@skatter.usask.ca
 *
 *  $Id: start.S,v 1.2 2001-09-27 12:00:08 chris Exp $
 */
 
#include "asm.h"
 
BEGIN_CODE
        /*
         * Step 1: Decide on Reset Stack Pointer and Initial Program Counter
         */
Entry:
        .long   m360+1024               |   0: Initial SSP
        .long   start                   |   1: Initial PC
        .long   _uhoh                   |   2: Bus error
        .long   _uhoh                   |   3: Address error
        .long   _uhoh                   |   4: Illegal instruction
        .long   _uhoh                   |   5: Zero division
        .long   _uhoh                   |   6: CHK, CHK2 instruction
        .long   _uhoh                   |   7: TRAPcc, TRAPV instructions
        .long   _uhoh                   |   8: Privilege violation
        .long   _uhoh                   |   9: Trace
        .long   _uhoh                   |  10: Line 1010 emulator
        .long   _uhoh                   |  11: Line 1111 emulator
        .long   _uhoh                   |  12: Hardware breakpoint
        .long   _uhoh                   |  13: Reserved for coprocessor violation
        .long   _uhoh                   |  14: Format error
        .long   _uhoh                   |  15: Uninitialized interrupt
        .long   _uhoh                   |  16: Unassigned, reserved
        .long   _uhoh                   |  17:
        .long   _uhoh                   |  18:
        .long   _uhoh                   |  19:
        .long   _uhoh                   |  20:
        .long   _uhoh                   |  21:
        .long   _uhoh                   |  22:
        .long   _uhoh                   |  23:
        .long   _spuriousInterrupt      |  24: Spurious interrupt
        .long   _uhoh                   |  25: Level 1 interrupt autovector
        .long   _uhoh                   |  26: Level 2 interrupt autovector
        .long   _uhoh                   |  27: Level 3 interrupt autovector
        .long   _uhoh                   |  28: Level 4 interrupt autovector
        .long   _uhoh                   |  29: Level 5 interrupt autovector
        .long   _uhoh                   |  30: Level 6 interrupt autovector
        .long   _uhoh                   |  31: Level 7 interrupt autovector
        .long   _uhoh                   |  32: Trap instruction (0-15)
        .long   _uhoh                   |  33:
        .long   _uhoh                   |  34:
        .long   _uhoh                   |  35:
        .long   _uhoh                   |  36:
        .long   _uhoh                   |  37:
        .long   _uhoh                   |  38:
        .long   _uhoh                   |  39:
        .long   _uhoh                   |  40:
        .long   _uhoh                   |  41:
        .long   _uhoh                   |  42:
        .long   _uhoh                   |  43:
        .long   _uhoh                   |  44:
        .long   _uhoh                   |  45:
        .long   _uhoh                   |  46:
        .long   _uhoh                   |  47:
        .long   _uhoh                   |  48: Reserved for coprocessor
        .long   _uhoh                   |  49:
        .long   _uhoh                   |  50:
        .long   _uhoh                   |  51:
        .long   _uhoh                   |  52:
        .long   _uhoh                   |  53:
        .long   _uhoh                   |  54:
        .long   _uhoh                   |  55:
        .long   _uhoh                   |  56:
        .long   _uhoh                   |  57:
        .long   _uhoh                   |  58:
        .long   _uhoh                   |  59: Unassigned, reserved
        .long   _uhoh                   |  60:
        .long   _uhoh                   |  61:
        .long   _uhoh                   |  62:
        .long   _uhoh                   |  63:
        .long   _uhoh                   |  64: User defined vectors (192)
        .long   _uhoh                   |  65:
        .long   _uhoh                   |  66:
        .long   _uhoh                   |  67:
        .long   _uhoh                   |  68:
        .long   _uhoh                   |  69:
        .long   _uhoh                   |  70:
        .long   _uhoh                   |  71:
        .long   _uhoh                   |  72:
        .long   _uhoh                   |  73:
        .long   _uhoh                   |  74:
        .long   _uhoh                   |  75:
        .long   _uhoh                   |  76:
        .long   _uhoh                   |  77:
        .long   _uhoh                   |  78:
        .long   _uhoh                   |  79:
        .long   _uhoh                   |  80:
        .long   _uhoh                   |  81:
        .long   _uhoh                   |  82:
        .long   _uhoh                   |  83:
        .long   _uhoh                   |  84:
        .long   _uhoh                   |  85:
        .long   _uhoh                   |  86:
        .long   _uhoh                   |  87:
        .long   _uhoh                   |  88:
        .long   _uhoh                   |  89:
        .long   _uhoh                   |  90:
        .long   _uhoh                   |  91:
        .long   _uhoh                   |  92:
        .long   _uhoh                   |  93:
        .long   _uhoh                   |  94:
        .long   _uhoh                   |  95:
        .long   _uhoh                   |  96:
        .long   _uhoh                   |  97:
        .long   _uhoh                   |  98:
        .long   _uhoh                   |  99:
        .long   _uhoh                   | 100:
        .long   _uhoh                   | 101:
        .long   _uhoh                   | 102:
        .long   _uhoh                   | 103:
        .long   _uhoh                   | 104:
        .long   _uhoh                   | 105:
        .long   _uhoh                   | 106:
        .long   _uhoh                   | 107:
        .long   _uhoh                   | 108:
        .long   _uhoh                   | 109:
        .long   _uhoh                   | 110:
        .long   _uhoh                   | 111:
        .long   _uhoh                   | 112:
        .long   _uhoh                   | 113:
        .long   _uhoh                   | 114:
        .long   _uhoh                   | 115:
        .long   _uhoh                   | 116:
        .long   _uhoh                   | 117:
        .long   _uhoh                   | 118:
        .long   _uhoh                   | 119:
        .long   _uhoh                   | 120:
        .long   _uhoh                   | 121:
        .long   _uhoh                   | 122:
        .long   _uhoh                   | 123:
        .long   _uhoh                   | 124:
        .long   _uhoh                   | 125:
        .long   _uhoh                   | 126:
        .long   _uhoh                   | 127:
        .long   _uhoh                   | 128:
        .long   _uhoh                   | 129:
        .long   _uhoh                   | 130:
        .long   _uhoh                   | 131:
        .long   _uhoh                   | 132:
        .long   _uhoh                   | 133:
        .long   _uhoh                   | 134:
        .long   _uhoh                   | 135:
        .long   _uhoh                   | 136:
        .long   _uhoh                   | 137:
        .long   _uhoh                   | 138:
        .long   _uhoh                   | 139:
        .long   _uhoh                   | 140:
        .long   _uhoh                   | 141:
        .long   _uhoh                   | 142:
        .long   _uhoh                   | 143:
        .long   _uhoh                   | 144:
        .long   _uhoh                   | 145:
        .long   _uhoh                   | 146:
        .long   _uhoh                   | 147:
        .long   _uhoh                   | 148:
        .long   _uhoh                   | 149:
        .long   _uhoh                   | 150:
        .long   _uhoh                   | 151:
        .long   _uhoh                   | 152:
        .long   _uhoh                   | 153:
        .long   _uhoh                   | 154:
        .long   _uhoh                   | 155:
        .long   _uhoh                   | 156:
        .long   _uhoh                   | 157:
        .long   _uhoh                   | 158:
        .long   _uhoh                   | 159:
        .long   _uhoh                   | 160:
        .long   _uhoh                   | 161:
        .long   _uhoh                   | 162:
        .long   _uhoh                   | 163:
        .long   _uhoh                   | 164:
        .long   _uhoh                   | 165:
        .long   _uhoh                   | 166:
        .long   _uhoh                   | 167:
        .long   _uhoh                   | 168:
        .long   _uhoh                   | 169:
        .long   _uhoh                   | 170:
        .long   _uhoh                   | 171:
        .long   _uhoh                   | 172:
        .long   _uhoh                   | 173:
        .long   _uhoh                   | 174:
        .long   _uhoh                   | 175:
        .long   _uhoh                   | 176:
        .long   _uhoh                   | 177:
        .long   _uhoh                   | 178:
        .long   _uhoh                   | 179:
        .long   _uhoh                   | 180:
        .long   _uhoh                   | 181:
        .long   _uhoh                   | 182:
        .long   _uhoh                   | 183:
        .long   _uhoh                   | 184:
        .long   _uhoh                   | 185:
        .long   _uhoh                   | 186:
        .long   _uhoh                   | 187:
        .long   _uhoh                   | 188:
        .long   _uhoh                   | 189:
        .long   _uhoh                   | 190:
        .long   _uhoh                   | 191:
        .long   _uhoh                   | 192:
        .long   _uhoh                   | 193:
        .long   _uhoh                   | 194:
        .long   _uhoh                   | 195:
        .long   _uhoh                   | 196:
        .long   _uhoh                   | 197:
        .long   _uhoh                   | 198:
        .long   _uhoh                   | 199:
        .long   _uhoh                   | 200:
        .long   _uhoh                   | 201:
        .long   _uhoh                   | 202:
        .long   _uhoh                   | 203:
        .long   _uhoh                   | 204:
        .long   _uhoh                   | 205:
        .long   _uhoh                   | 206:
        .long   _uhoh                   | 207:
        .long   _uhoh                   | 208:
        .long   _uhoh                   | 209:
        .long   _uhoh                   | 210:
        .long   _uhoh                   | 211:
        .long   _uhoh                   | 212:
        .long   _uhoh                   | 213:
        .long   _uhoh                   | 214:
        .long   _uhoh                   | 215:
        .long   _uhoh                   | 216:
        .long   _uhoh                   | 217:
        .long   _uhoh                   | 218:
        .long   _uhoh                   | 219:
        .long   _uhoh                   | 220:
        .long   _uhoh                   | 221:
        .long   _uhoh                   | 222:
        .long   _uhoh                   | 223:
        .long   _uhoh                   | 224:
        .long   _uhoh                   | 225:
        .long   _uhoh                   | 226:
        .long   _uhoh                   | 227:
        .long   _uhoh                   | 228:
        .long   _uhoh                   | 229:
        .long   _uhoh                   | 230:
        .long   _uhoh                   | 231:
        .long   _uhoh                   | 232:
        .long   _uhoh                   | 233:
        .long   _uhoh                   | 234:
        .long   _uhoh                   | 235:
        .long   _uhoh                   | 236:
        .long   _uhoh                   | 237:
        .long   _uhoh                   | 238:
        .long   _uhoh                   | 239:
        .long   _uhoh                   | 240:
        .long   _uhoh                   | 241:
        .long   _uhoh                   | 242:
        .long   _uhoh                   | 243:
        .long   _uhoh                   | 244:
        .long   _uhoh                   | 245:
        .long   _uhoh                   | 246:
        .long   _uhoh                   | 247:
        .long   _uhoh                   | 248:
        .long   _uhoh                   | 249:
        .long   _uhoh                   | 250:
        .long   _uhoh                   | 251:
        .long   _uhoh                   | 252:
        .long   _uhoh                   | 253:
        .long   _uhoh                   | 254:
        .long   _uhoh                   | 255:
 
/*
 * Default trap handler
 * With an oscilloscope you can see AS* stop
 */
        PUBLIC (_uhoh)
_uhoh:  nop                             | Leave spot for breakpoint
        stop    #0x2700                 | Stop with interrupts disabled
        bra.l   _uhoh                   | Stuck forever
 
/*
 * Log, but otherwise ignore, spurious interrupts
 */
        PUBLIC (_spuriousInterrupt)
_spuriousInterrupt:
        addql   #1,_M68kSpuriousInterruptCount
        rte
 
/*
 * Place the low-order 3 octets of the board's ethernet address at
 * a `well-known' fixed location relative to the startup location.
 */
        .align 2
        .word   0                        | Padding
ethernet_address_buffer:
        .word   0x08F3                  | Default address
        .word   0xDEAD
        .word   0xCAFE
 
/*
 * Initial PC
 */
.globl start
start:
        /*
         * Step 2: Stay in Supervisor Mode
         */
#if ( M68K_HAS_SEPARATE_STACKS == 1 )
        oriw    #0x3000,sr              | Switch to Master Stack Pointer
        lea     SYM(m360)+1024-64,a7    | Put stack in dual-port ram
                                        | a little below the interrupt stack
#endif
 
        /*
         * Step 3: Write the VBR
         */
        lea     Entry,a0                | Get base of vector table
        movec   a0,vbr                  | Set up the VBR
 
        /*
         * Step 4: Write the MBAR
         */
        movec   dfc,d1                  | Save destination register
        moveq   #7,d0                   | CPU-space funcction code
        movec   d0,dfc                  | Set destination function code register
        movel   #m360+0x101,d0          | MBAR value (mask CPU space accesses)
        movesl  d0,0x3FF00              | Set MBAR
        movec   d1,dfc                  | Restore destination register
 
        /*
         * Step 5: Verify a dual-port RAM location
         */
        lea     m360,a0                 | Point a0 to first DPRAM location
        moveb   #0x33,d0                | Set the test value
        moveb   d0,a0@                  | Set the memory location
        cmpb    a0@,d0                  | Does it read back?
        bne     _uhoh                   | If not, bad news!
        notb    d0                      | Flip bits
        moveb   d0,a0@                  | Set the memory location
        cmpb    a0@,d0                  | Does it read back?
        bne     _uhoh                   | If not, bad news!
 
        /*
         * Remaining steps are handled by C code
         */
        jmp     _Init68360              | Start C code (which never returns)
 
/*
 * Copy DATA segment, clear BSS segment, set up real stack, start C program.
 * Assume that DATA and BSS sizes are multiples of 4.
 */
        PUBLIC (_CopyDataClearBSSAndStart)
_CopyDataClearBSSAndStart:
        lea     _copy_start,a0          | Get start of DATA in RAM
        lea     etext,a2                | Get start of DATA in ROM
        cmpl    a0,a2                   | Are they the same?
        beq.s   NOCOPY                  | Yes, no copy necessary
        lea     _copy_end,a1            | Get end of DATA in RAM
        bra.s   COPYLOOPTEST            | Branch into copy loop
COPYLOOP:
        movel   a2@+,a0@+               | Copy word from ROM to RAM
COPYLOOPTEST:
        cmpl    a1,a0                   | Done?
        bcs.s   COPYLOOP                | No, skip
NOCOPY:
 
        lea     _clear_start,a0         | Get start of BSS
        lea     _clear_end,a1           | Get end of BSS
        clrl    d0                      | Value to set
        bra.s   ZEROLOOPTEST            | Branch into clear loop
ZEROLOOP:
        movel   d0,a0@+                 | Clear a word
ZEROLOOPTEST:
        cmpl    a1,a0                   | Done?
        bcs.s   ZEROLOOP                | No, skip
 
        movel   4(a7),_M68k_Ramsize     | Set RAM size
 
        movel   #_stack_init,a7         | set master stack pointer
        pea     env                     | envp
        pea     arg                     | argv
        movel   d0,a7@-                 | argc
        jsr     boot_card               | Call C main
 
        PUBLIC (_mainDone)
_mainDone:
        nop                             | Leave spot for breakpoint
        movew   #1,a7                   | Force a double bus error
        movel   d0,a7@-                 | This should cause a RESET
        stop    #0x2700                 | Stop with interrupts disabled
        bra.l   _mainDone               | Stuck forever
 
        .align 2
END_CODE
 
BEGIN_DATA_DCL
        .align 2
        PUBLIC (environ)
environ:
        .long   env
        PUBLIC (_M68kSpuriousInterruptCount)
_M68kSpuriousInterruptCount:
        .long   0
END_DATA_DCL
 
BEGIN_BSS
env:    .long   0
arg:    .long   0
END_BSS
 
END

Browse

Tools

Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [gen68360/] [start/] [start.S] - Blame information for rev 493

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`*`
3			`* This file contains the entry point for the application.`
4			`* It jumps to the BSP which is responsible for performing`
5			`* all initialization.`
6			`*`
7			`* COPYRIGHT (c) 1989-1999.`
8			`* On-Line Applications Research Corporation (OAR).`
9			`*`
10			`* The license and distribution terms for this file may in`
11			`* the file LICENSE in this distribution or at`
12			`* http://www.OARcorp.com/rtems/license.html.`
13			`*`
14			* Based on the `gen68302' board support package, and covered by the
15			`* original distribution terms.`
16			`*`
17			`* W. Eric Norum`
18			`* Saskatchewan Accelerator Laboratory`
19			`* University of Saskatchewan`
20			`* Saskatoon, Saskatchewan, CANADA`
21			`* eric@skatter.usask.ca`
22			`*`
23			`* $Id: start.S,v 1.2 2001-09-27 12:00:08 chris Exp $`
24			`*/`
25
26			`#include "asm.h"`
27
28			`BEGIN_CODE`
29			`/*`
30			`* Step 1: Decide on Reset Stack Pointer and Initial Program Counter`
31			`*/`
32			`Entry:`
33			`.long m360+1024 \| 0: Initial SSP`
34			`.long start \| 1: Initial PC`
35			`.long _uhoh \| 2: Bus error`
36			`.long _uhoh \| 3: Address error`
37			`.long _uhoh \| 4: Illegal instruction`
38			`.long _uhoh \| 5: Zero division`
39			`.long _uhoh \| 6: CHK, CHK2 instruction`
40			`.long _uhoh \| 7: TRAPcc, TRAPV instructions`
41			`.long _uhoh \| 8: Privilege violation`
42			`.long _uhoh \| 9: Trace`
43			`.long _uhoh \| 10: Line 1010 emulator`
44			`.long _uhoh \| 11: Line 1111 emulator`
45			`.long _uhoh \| 12: Hardware breakpoint`
46			`.long _uhoh \| 13: Reserved for coprocessor violation`
47			`.long _uhoh \| 14: Format error`
48			`.long _uhoh \| 15: Uninitialized interrupt`
49			`.long _uhoh \| 16: Unassigned, reserved`
50			`.long _uhoh \| 17:`
51			`.long _uhoh \| 18:`
52			`.long _uhoh \| 19:`
53			`.long _uhoh \| 20:`
54			`.long _uhoh \| 21:`
55			`.long _uhoh \| 22:`
56			`.long _uhoh \| 23:`
57			`.long _spuriousInterrupt \| 24: Spurious interrupt`
58			`.long _uhoh \| 25: Level 1 interrupt autovector`
59			`.long _uhoh \| 26: Level 2 interrupt autovector`
60			`.long _uhoh \| 27: Level 3 interrupt autovector`
61			`.long _uhoh \| 28: Level 4 interrupt autovector`
62			`.long _uhoh \| 29: Level 5 interrupt autovector`
63			`.long _uhoh \| 30: Level 6 interrupt autovector`
64			`.long _uhoh \| 31: Level 7 interrupt autovector`
65			`.long _uhoh \| 32: Trap instruction (0-15)`
66			`.long _uhoh \| 33:`
67			`.long _uhoh \| 34:`
68			`.long _uhoh \| 35:`
69			`.long _uhoh \| 36:`
70			`.long _uhoh \| 37:`
71			`.long _uhoh \| 38:`
72			`.long _uhoh \| 39:`
73			`.long _uhoh \| 40:`
74			`.long _uhoh \| 41:`
75			`.long _uhoh \| 42:`
76			`.long _uhoh \| 43:`
77			`.long _uhoh \| 44:`
78			`.long _uhoh \| 45:`
79			`.long _uhoh \| 46:`
80			`.long _uhoh \| 47:`
81			`.long _uhoh \| 48: Reserved for coprocessor`
82			`.long _uhoh \| 49:`
83			`.long _uhoh \| 50:`
84			`.long _uhoh \| 51:`
85			`.long _uhoh \| 52:`
86			`.long _uhoh \| 53:`
87			`.long _uhoh \| 54:`
88			`.long _uhoh \| 55:`
89			`.long _uhoh \| 56:`
90			`.long _uhoh \| 57:`
91			`.long _uhoh \| 58:`
92			`.long _uhoh \| 59: Unassigned, reserved`
93			`.long _uhoh \| 60:`
94			`.long _uhoh \| 61:`
95			`.long _uhoh \| 62:`
96			`.long _uhoh \| 63:`
97			`.long _uhoh \| 64: User defined vectors (192)`
98			`.long _uhoh \| 65:`
99			`.long _uhoh \| 66:`
100			`.long _uhoh \| 67:`
101			`.long _uhoh \| 68:`
102			`.long _uhoh \| 69:`
103			`.long _uhoh \| 70:`
104			`.long _uhoh \| 71:`
105			`.long _uhoh \| 72:`
106			`.long _uhoh \| 73:`
107			`.long _uhoh \| 74:`
108			`.long _uhoh \| 75:`
109			`.long _uhoh \| 76:`
110			`.long _uhoh \| 77:`
111			`.long _uhoh \| 78:`
112			`.long _uhoh \| 79:`
113			`.long _uhoh \| 80:`
114			`.long _uhoh \| 81:`
115			`.long _uhoh \| 82:`
116			`.long _uhoh \| 83:`
117			`.long _uhoh \| 84:`
118			`.long _uhoh \| 85:`
119			`.long _uhoh \| 86:`
120			`.long _uhoh \| 87:`
121			`.long _uhoh \| 88:`
122			`.long _uhoh \| 89:`
123			`.long _uhoh \| 90:`
124			`.long _uhoh \| 91:`
125			`.long _uhoh \| 92:`
126			`.long _uhoh \| 93:`
127			`.long _uhoh \| 94:`
128			`.long _uhoh \| 95:`
129			`.long _uhoh \| 96:`
130			`.long _uhoh \| 97:`
131			`.long _uhoh \| 98:`
132			`.long _uhoh \| 99:`
133			`.long _uhoh \| 100:`
134			`.long _uhoh \| 101:`
135			`.long _uhoh \| 102:`
136			`.long _uhoh \| 103:`
137			`.long _uhoh \| 104:`
138			`.long _uhoh \| 105:`
139			`.long _uhoh \| 106:`
140			`.long _uhoh \| 107:`
141			`.long _uhoh \| 108:`
142			`.long _uhoh \| 109:`
143			`.long _uhoh \| 110:`
144			`.long _uhoh \| 111:`
145			`.long _uhoh \| 112:`
146			`.long _uhoh \| 113:`
147			`.long _uhoh \| 114:`
148			`.long _uhoh \| 115:`
149			`.long _uhoh \| 116:`
150			`.long _uhoh \| 117:`
151			`.long _uhoh \| 118:`
152			`.long _uhoh \| 119:`
153			`.long _uhoh \| 120:`
154			`.long _uhoh \| 121:`
155			`.long _uhoh \| 122:`
156			`.long _uhoh \| 123:`
157			`.long _uhoh \| 124:`
158			`.long _uhoh \| 125:`
159			`.long _uhoh \| 126:`
160			`.long _uhoh \| 127:`
161			`.long _uhoh \| 128:`
162			`.long _uhoh \| 129:`
163			`.long _uhoh \| 130:`
164			`.long _uhoh \| 131:`
165			`.long _uhoh \| 132:`
166			`.long _uhoh \| 133:`
167			`.long _uhoh \| 134:`
168			`.long _uhoh \| 135:`
169			`.long _uhoh \| 136:`
170			`.long _uhoh \| 137:`
171			`.long _uhoh \| 138:`
172			`.long _uhoh \| 139:`
173			`.long _uhoh \| 140:`
174			`.long _uhoh \| 141:`
175			`.long _uhoh \| 142:`
176			`.long _uhoh \| 143:`
177			`.long _uhoh \| 144:`
178			`.long _uhoh \| 145:`
179			`.long _uhoh \| 146:`
180			`.long _uhoh \| 147:`
181			`.long _uhoh \| 148:`
182			`.long _uhoh \| 149:`
183			`.long _uhoh \| 150:`
184			`.long _uhoh \| 151:`
185			`.long _uhoh \| 152:`
186			`.long _uhoh \| 153:`
187			`.long _uhoh \| 154:`
188			`.long _uhoh \| 155:`
189			`.long _uhoh \| 156:`
190			`.long _uhoh \| 157:`
191			`.long _uhoh \| 158:`
192			`.long _uhoh \| 159:`
193			`.long _uhoh \| 160:`
194			`.long _uhoh \| 161:`
195			`.long _uhoh \| 162:`
196			`.long _uhoh \| 163:`
197			`.long _uhoh \| 164:`
198			`.long _uhoh \| 165:`
199			`.long _uhoh \| 166:`
200			`.long _uhoh \| 167:`
201			`.long _uhoh \| 168:`
202			`.long _uhoh \| 169:`
203			`.long _uhoh \| 170:`
204			`.long _uhoh \| 171:`
205			`.long _uhoh \| 172:`
206			`.long _uhoh \| 173:`
207			`.long _uhoh \| 174:`
208			`.long _uhoh \| 175:`
209			`.long _uhoh \| 176:`
210			`.long _uhoh \| 177:`
211			`.long _uhoh \| 178:`
212			`.long _uhoh \| 179:`
213			`.long _uhoh \| 180:`
214			`.long _uhoh \| 181:`
215			`.long _uhoh \| 182:`
216			`.long _uhoh \| 183:`
217			`.long _uhoh \| 184:`
218			`.long _uhoh \| 185:`
219			`.long _uhoh \| 186:`
220			`.long _uhoh \| 187:`
221			`.long _uhoh \| 188:`
222			`.long _uhoh \| 189:`
223			`.long _uhoh \| 190:`
224			`.long _uhoh \| 191:`
225			`.long _uhoh \| 192:`
226			`.long _uhoh \| 193:`
227			`.long _uhoh \| 194:`
228			`.long _uhoh \| 195:`
229			`.long _uhoh \| 196:`
230			`.long _uhoh \| 197:`
231			`.long _uhoh \| 198:`
232			`.long _uhoh \| 199:`
233			`.long _uhoh \| 200:`
234			`.long _uhoh \| 201:`
235			`.long _uhoh \| 202:`
236			`.long _uhoh \| 203:`
237			`.long _uhoh \| 204:`
238			`.long _uhoh \| 205:`
239			`.long _uhoh \| 206:`
240			`.long _uhoh \| 207:`
241			`.long _uhoh \| 208:`
242			`.long _uhoh \| 209:`
243			`.long _uhoh \| 210:`
244			`.long _uhoh \| 211:`
245			`.long _uhoh \| 212:`
246			`.long _uhoh \| 213:`
247			`.long _uhoh \| 214:`
248			`.long _uhoh \| 215:`
249			`.long _uhoh \| 216:`
250			`.long _uhoh \| 217:`
251			`.long _uhoh \| 218:`
252			`.long _uhoh \| 219:`
253			`.long _uhoh \| 220:`
254			`.long _uhoh \| 221:`
255			`.long _uhoh \| 222:`
256			`.long _uhoh \| 223:`
257			`.long _uhoh \| 224:`
258			`.long _uhoh \| 225:`
259			`.long _uhoh \| 226:`
260			`.long _uhoh \| 227:`
261			`.long _uhoh \| 228:`
262			`.long _uhoh \| 229:`
263			`.long _uhoh \| 230:`
264			`.long _uhoh \| 231:`
265			`.long _uhoh \| 232:`
266			`.long _uhoh \| 233:`
267			`.long _uhoh \| 234:`
268			`.long _uhoh \| 235:`
269			`.long _uhoh \| 236:`
270			`.long _uhoh \| 237:`
271			`.long _uhoh \| 238:`
272			`.long _uhoh \| 239:`
273			`.long _uhoh \| 240:`
274			`.long _uhoh \| 241:`
275			`.long _uhoh \| 242:`
276			`.long _uhoh \| 243:`
277			`.long _uhoh \| 244:`
278			`.long _uhoh \| 245:`
279			`.long _uhoh \| 246:`
280			`.long _uhoh \| 247:`
281			`.long _uhoh \| 248:`
282			`.long _uhoh \| 249:`
283			`.long _uhoh \| 250:`
284			`.long _uhoh \| 251:`
285			`.long _uhoh \| 252:`
286			`.long _uhoh \| 253:`
287			`.long _uhoh \| 254:`
288			`.long _uhoh \| 255:`
289
290			`/*`
291			`* Default trap handler`
292			`* With an oscilloscope you can see AS* stop`
293			`*/`
294			`PUBLIC (_uhoh)`
295			`_uhoh: nop \| Leave spot for breakpoint`
296			`stop #0x2700 \| Stop with interrupts disabled`
297			`bra.l _uhoh \| Stuck forever`
298
299			`/*`
300			`* Log, but otherwise ignore, spurious interrupts`
301			`*/`
302			`PUBLIC (_spuriousInterrupt)`
303			`_spuriousInterrupt:`
304			`addql #1,_M68kSpuriousInterruptCount`
305			`rte`
306
307			`/*`
308			`* Place the low-order 3 octets of the board's ethernet address at`
309			* a `well-known' fixed location relative to the startup location.
310			`*/`
311			`.align 2`
312			`.word 0 \| Padding`
313			`ethernet_address_buffer:`
314			`.word 0x08F3 \| Default address`
315			`.word 0xDEAD`
316			`.word 0xCAFE`
317
318			`/*`
319			`* Initial PC`
320			`*/`
321			`.globl start`
322			`start:`
323			`/*`
324			`* Step 2: Stay in Supervisor Mode`
325			`*/`
326			`#if ( M68K_HAS_SEPARATE_STACKS == 1 )`
327			`oriw #0x3000,sr \| Switch to Master Stack Pointer`
328			`lea SYM(m360)+1024-64,a7 \| Put stack in dual-port ram`
329			`\| a little below the interrupt stack`
330			`#endif`
331
332			`/*`
333			`* Step 3: Write the VBR`
334			`*/`
335			`lea Entry,a0 \| Get base of vector table`
336			`movec a0,vbr \| Set up the VBR`
337
338			`/*`
339			`* Step 4: Write the MBAR`
340			`*/`
341			`movec dfc,d1 \| Save destination register`
342			`moveq #7,d0 \| CPU-space funcction code`
343			`movec d0,dfc \| Set destination function code register`
344			`movel #m360+0x101,d0 \| MBAR value (mask CPU space accesses)`
345			`movesl d0,0x3FF00 \| Set MBAR`
346			`movec d1,dfc \| Restore destination register`
347
348			`/*`
349			`* Step 5: Verify a dual-port RAM location`
350			`*/`
351			`lea m360,a0 \| Point a0 to first DPRAM location`
352			`moveb #0x33,d0 \| Set the test value`
353			`moveb d0,a0@ \| Set the memory location`
354			`cmpb a0@,d0 \| Does it read back?`
355			`bne _uhoh \| If not, bad news!`
356			`notb d0 \| Flip bits`
357			`moveb d0,a0@ \| Set the memory location`
358			`cmpb a0@,d0 \| Does it read back?`
359			`bne _uhoh \| If not, bad news!`
360
361			`/*`
362			`* Remaining steps are handled by C code`
363			`*/`
364			`jmp _Init68360 \| Start C code (which never returns)`
365
366			`/*`
367			`* Copy DATA segment, clear BSS segment, set up real stack, start C program.`
368			`* Assume that DATA and BSS sizes are multiples of 4.`
369			`*/`
370			`PUBLIC (_CopyDataClearBSSAndStart)`
371			`_CopyDataClearBSSAndStart:`
372			`lea _copy_start,a0 \| Get start of DATA in RAM`
373			`lea etext,a2 \| Get start of DATA in ROM`
374			`cmpl a0,a2 \| Are they the same?`
375			`beq.s NOCOPY \| Yes, no copy necessary`
376			`lea _copy_end,a1 \| Get end of DATA in RAM`
377			`bra.s COPYLOOPTEST \| Branch into copy loop`
378			`COPYLOOP:`
379			`movel a2@+,a0@+ \| Copy word from ROM to RAM`
380			`COPYLOOPTEST:`
381			`cmpl a1,a0 \| Done?`
382			`bcs.s COPYLOOP \| No, skip`
383			`NOCOPY:`
384
385			`lea _clear_start,a0 \| Get start of BSS`
386			`lea _clear_end,a1 \| Get end of BSS`
387			`clrl d0 \| Value to set`
388			`bra.s ZEROLOOPTEST \| Branch into clear loop`
389			`ZEROLOOP:`
390			`movel d0,a0@+ \| Clear a word`
391			`ZEROLOOPTEST:`
392			`cmpl a1,a0 \| Done?`
393			`bcs.s ZEROLOOP \| No, skip`
394
395			`movel 4(a7),_M68k_Ramsize \| Set RAM size`
396
397			`movel #_stack_init,a7 \| set master stack pointer`
398			`pea env \| envp`
399			`pea arg \| argv`
400			`movel d0,a7@- \| argc`
401			`jsr boot_card \| Call C main`
402
403			`PUBLIC (_mainDone)`
404			`_mainDone:`
405			`nop \| Leave spot for breakpoint`
406			`movew #1,a7 \| Force a double bus error`
407			`movel d0,a7@- \| This should cause a RESET`
408			`stop #0x2700 \| Stop with interrupts disabled`
409			`bra.l _mainDone \| Stuck forever`
410
411			`.align 2`
412			`END_CODE`
413
414			`BEGIN_DATA_DCL`
415			`.align 2`
416			`PUBLIC (environ)`
417			`environ:`
418			`.long env`
419			`PUBLIC (_M68kSpuriousInterruptCount)`
420			`_M68kSpuriousInterruptCount:`
421			`.long 0`
422			`END_DATA_DCL`
423
424			`BEGIN_BSS`
425			`env: .long 0`
426			`arg: .long 0`
427			`END_BSS`
428
429			`END`