| /* |
| * cpu32bug.S -- board support for the CPU32BUG monitor. |
| * |
| * Copyright (c) 1995, 1996 Cygnus Support |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| #include "asm.h" |
| #include "cpu32bug.h" |
| |
| .title "cpu32bug.S for m68k-coff" |
| |
| .text |
| .global SYM (_exit) |
| .global SYM (outln) |
| .global SYM (outbyte) |
| .global SYM (putDebugChar) |
| .global SYM (inbyte) |
| .global SYM (getDebugChar) |
| .global SYM (havebyte) |
| |
| /* |
| * _exit -- Exit from the application. Normally we cause a user trap |
| * to return to the ROM monitor for another run. |
| */ |
| .text |
| .align 2 |
| SYM (_exit): |
| link fp, IMM(0) |
| trap IMM(15) |
| .word RETURN |
| |
| /* |
| * inbyte -- get a byte from the serial port |
| * d0 - contains the byte read in |
| */ |
| .text |
| .align 2 |
| SYM (getDebugChar): /* symbol name used by m68k-stub */ |
| SYM (inbyte): |
| link fp, IMM(-8) |
| trap IMM(15) |
| .word INCHR |
| moveb sp@, d0 |
| extw d0 |
| extl d0 |
| unlk fp |
| rts |
| |
| /* |
| * outbyte -- sends a byte out the serial port |
| * d0 - contains the byte to be sent |
| */ |
| .text |
| .align 2 |
| SYM (putDebugChar): /* symbol name used by m68k-stub */ |
| SYM (outbyte): |
| link fp, IMM(-4) |
| moveb fp@(11), sp@ |
| trap IMM(15) |
| .word OUTCHR |
| unlk fp |
| rts |
| |
| /* |
| * outln -- sends a string of bytes out the serial port with a CR/LF |
| * a0 - contains the address of the string's first byte |
| * a1 - contains the address of the string's last byte |
| */ |
| .text |
| .align 2 |
| SYM (outln): |
| link fp, IMM(-8) |
| moveml a0/a1, sp@ |
| trap IMM(15) |
| .word OUTLN |
| unlk fp |
| rts |
| |
| /* |
| * outstr -- sends a string of bytes out the serial port without a CR/LF |
| * a0 - contains the address of the string's first byte |
| * a1 - contains the address of the string's last byte |
| */ |
| .text |
| .align 2 |
| SYM (outstr): |
| link fp, IMM(-8) |
| moveml a0/a1, sp@ |
| trap IMM(15) |
| .word OUTSTR |
| unlk fp |
| rts |
| |
| /* |
| * havebyte -- checks to see if there is a byte in the serial port, |
| * returns 1 if there is a byte, 0 otherwise. |
| */ |
| .text |
| .align 2 |
| SYM (havebyte): |
| trap IMM(15) |
| .word INSTAT |
| beqs empty |
| movel IMM(1), d0 |
| rts |
| empty: |
| movel IMM(0), d0 |
| rts |
