Commit | Line | Data |
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fca5dcd4 PM |
1 | /* |
2 | * Copyright (C) 1996-2005 Paul Mackerras. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | */ | |
9 | #include <linux/string.h> | |
33b5cd68 | 10 | #include <asm/udbg.h> |
fca5dcd4 PM |
11 | #include <asm/time.h> |
12 | #include "nonstdio.h" | |
13 | ||
33b5cd68 ME |
14 | |
15 | static int xmon_write(const void *ptr, int nb) | |
16 | { | |
17 | return udbg_write(ptr, nb); | |
18 | } | |
19 | ||
20 | static int xmon_readchar(void) | |
21 | { | |
22 | if (udbg_getc) | |
23 | return udbg_getc(); | |
24 | return -1; | |
25 | } | |
26 | ||
fca5dcd4 PM |
27 | int xmon_putchar(int c) |
28 | { | |
29 | char ch = c; | |
30 | ||
31 | if (c == '\n') | |
32 | xmon_putchar('\r'); | |
33 | return xmon_write(&ch, 1) == 1? c: -1; | |
34 | } | |
35 | ||
36 | static char line[256]; | |
37 | static char *lineptr; | |
38 | static int lineleft; | |
39 | ||
88c6d626 | 40 | static int xmon_getchar(void) |
fca5dcd4 PM |
41 | { |
42 | int c; | |
43 | ||
44 | if (lineleft == 0) { | |
45 | lineptr = line; | |
46 | for (;;) { | |
47 | c = xmon_readchar(); | |
48 | if (c == -1 || c == 4) | |
49 | break; | |
50 | if (c == '\r' || c == '\n') { | |
51 | *lineptr++ = '\n'; | |
52 | xmon_putchar('\n'); | |
53 | break; | |
54 | } | |
55 | switch (c) { | |
56 | case 0177: | |
57 | case '\b': | |
58 | if (lineptr > line) { | |
59 | xmon_putchar('\b'); | |
60 | xmon_putchar(' '); | |
61 | xmon_putchar('\b'); | |
62 | --lineptr; | |
63 | } | |
64 | break; | |
65 | case 'U' & 0x1F: | |
66 | while (lineptr > line) { | |
67 | xmon_putchar('\b'); | |
68 | xmon_putchar(' '); | |
69 | xmon_putchar('\b'); | |
70 | --lineptr; | |
71 | } | |
72 | break; | |
73 | default: | |
74 | if (lineptr >= &line[sizeof(line) - 1]) | |
75 | xmon_putchar('\a'); | |
76 | else { | |
77 | xmon_putchar(c); | |
78 | *lineptr++ = c; | |
79 | } | |
80 | } | |
81 | } | |
82 | lineleft = lineptr - line; | |
83 | lineptr = line; | |
84 | } | |
85 | if (lineleft == 0) | |
86 | return -1; | |
87 | --lineleft; | |
88 | return *lineptr++; | |
89 | } | |
90 | ||
91 | char *xmon_gets(char *str, int nb) | |
92 | { | |
93 | char *p; | |
94 | int c; | |
95 | ||
96 | for (p = str; p < str + nb - 1; ) { | |
97 | c = xmon_getchar(); | |
98 | if (c == -1) { | |
99 | if (p == str) | |
100 | return NULL; | |
101 | break; | |
102 | } | |
103 | *p++ = c; | |
104 | if (c == '\n') | |
105 | break; | |
106 | } | |
107 | *p = 0; | |
108 | return str; | |
109 | } | |
110 | ||
111 | void xmon_printf(const char *format, ...) | |
112 | { | |
113 | va_list args; | |
fca5dcd4 | 114 | static char xmon_outbuf[1024]; |
b2bb65f6 | 115 | int rc, n; |
fca5dcd4 PM |
116 | |
117 | va_start(args, format); | |
118 | n = vsnprintf(xmon_outbuf, sizeof(xmon_outbuf), format, args); | |
119 | va_end(args); | |
b2bb65f6 ME |
120 | |
121 | rc = xmon_write(xmon_outbuf, n); | |
122 | ||
123 | if (n && rc == 0) { | |
124 | /* No udbg hooks, fallback to printk() - dangerous */ | |
50b66dbf | 125 | printk("%s", xmon_outbuf); |
b2bb65f6 | 126 | } |
fca5dcd4 | 127 | } |
4d404edc IK |
128 | |
129 | void xmon_puts(const char *str) | |
130 | { | |
131 | xmon_write(str, strlen(str)); | |
132 | } |