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/*
 * 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

Line No.	Rev	Author	Line
1	148	jeremybenn	`/*`
2			`* cpu32bug.S -- board support for the CPU32BUG monitor.`
3			`*`
4			`* Copyright (c) 1995, 1996 Cygnus Support`
5			`*`
6			`* The authors hereby grant permission to use, copy, modify, distribute,`
7			`* and license this software and its documentation for any purpose, provided`
8			`* that existing copyright notices are retained in all copies and that this`
9			`* notice is included verbatim in any distributions. No written agreement,`
10			`* license, or royalty fee is required for any of the authorized uses.`
11			`* Modifications to this software may be copyrighted by their authors`
12			`* and need not follow the licensing terms described here, provided that`
13			`* the new terms are clearly indicated on the first page of each file where`
14			`* they apply.`
15			`*/`
16
17			`#include "asm.h"`
18			`#include "cpu32bug.h"`
19
20			`.title "cpu32bug.S for m68k-coff"`
21
22			`.text`
23			`.global SYM (_exit)`
24			`.global SYM (outln)`
25			`.global SYM (outbyte)`
26			`.global SYM (putDebugChar)`
27			`.global SYM (inbyte)`
28			`.global SYM (getDebugChar)`
29			`.global SYM (havebyte)`
30
31			`/*`
32			`* _exit -- Exit from the application. Normally we cause a user trap`
33			`* to return to the ROM monitor for another run.`
34			`*/`
35			`.text`
36			`.align 2`
37			`SYM (_exit):`
38			`link fp, IMM(0)`
39			`trap IMM(15)`
40			`.word RETURN`
41
42			`/*`
43			`* inbyte -- get a byte from the serial port`
44			`* d0 - contains the byte read in`
45			`*/`
46			`.text`
47			`.align 2`
48			`SYM (getDebugChar): /* symbol name used by m68k-stub */`
49			`SYM (inbyte):`
50			`link fp, IMM(-8)`
51			`trap IMM(15)`
52			`.word INCHR`
53			`moveb sp@, d0`
54			`extw d0`
55			`extl d0`
56			`unlk fp`
57			`rts`
58
59			`/*`
60			`* outbyte -- sends a byte out the serial port`
61			`* d0 - contains the byte to be sent`
62			`*/`
63			`.text`
64			`.align 2`
65			`SYM (putDebugChar): /* symbol name used by m68k-stub */`
66			`SYM (outbyte):`
67			`link fp, IMM(-4)`
68			`moveb fp@(11), sp@`
69			`trap IMM(15)`
70			`.word OUTCHR`
71			`unlk fp`
72			`rts`
73
74			`/*`
75			`* outln -- sends a string of bytes out the serial port with a CR/LF`
76			`* a0 - contains the address of the string's first byte`
77			`* a1 - contains the address of the string's last byte`
78			`*/`
79			`.text`
80			`.align 2`
81			`SYM (outln):`
82			`link fp, IMM(-8)`
83			`moveml a0/a1, sp@`
84			`trap IMM(15)`
85			`.word OUTLN`
86			`unlk fp`
87			`rts`
88
89			`/*`
90			`* outstr -- sends a string of bytes out the serial port without a CR/LF`
91			`* a0 - contains the address of the string's first byte`
92			`* a1 - contains the address of the string's last byte`
93			`*/`
94			`.text`
95			`.align 2`
96			`SYM (outstr):`
97			`link fp, IMM(-8)`
98			`moveml a0/a1, sp@`
99			`trap IMM(15)`
100			`.word OUTSTR`
101			`unlk fp`
102			`rts`
103
104			`/*`
105			`* havebyte -- checks to see if there is a byte in the serial port,`
106			`* returns 1 if there is a byte, 0 otherwise.`
107			`*/`
108			`.text`
109			`.align 2`
110			`SYM (havebyte):`
111			`trap IMM(15)`
112			`.word INSTAT`
113			`beqs empty`
114			`movel IMM(1), d0`
115			`rts`
116			`empty:`
117			`movel IMM(0), d0`
118			`rts`

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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [libgloss/] [m68k/] [cpu32bug.S] - Blame information for rev 455