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Commit | Line | Data |
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1da177e4 | 1 | /* |
7f853352 | 2 | * polling mode stateless debugging stuff, originally for NS16550 Serial Ports |
1da177e4 LT |
3 | * |
4 | * c 2001 PPC 64 Team, IBM Corp | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <stdarg.h> | |
13 | #define WANT_PPCDBG_TAB /* Only defined here */ | |
14 | #include <linux/config.h> | |
15 | #include <linux/types.h> | |
188d2ce7 | 16 | #include <linux/sched.h> |
1da177e4 LT |
17 | #include <asm/ppcdebug.h> |
18 | #include <asm/processor.h> | |
1da177e4 | 19 | |
c8f1c8be MM |
20 | void (*udbg_putc)(unsigned char c); |
21 | unsigned char (*udbg_getc)(void); | |
22 | int (*udbg_getc_poll)(void); | |
23 | ||
1da177e4 LT |
24 | void udbg_puts(const char *s) |
25 | { | |
c8f1c8be | 26 | if (udbg_putc) { |
1da177e4 LT |
27 | char c; |
28 | ||
29 | if (s && *s != '\0') { | |
30 | while ((c = *s++) != '\0') | |
c8f1c8be | 31 | udbg_putc(c); |
1da177e4 LT |
32 | } |
33 | } | |
34 | #if 0 | |
35 | else { | |
36 | printk("%s", s); | |
37 | } | |
38 | #endif | |
39 | } | |
40 | ||
41 | int udbg_write(const char *s, int n) | |
42 | { | |
43 | int remain = n; | |
44 | char c; | |
45 | ||
c8f1c8be | 46 | if (!udbg_putc) |
1da177e4 LT |
47 | return 0; |
48 | ||
49 | if (s && *s != '\0') { | |
50 | while (((c = *s++) != '\0') && (remain-- > 0)) { | |
c8f1c8be | 51 | udbg_putc(c); |
1da177e4 LT |
52 | } |
53 | } | |
54 | ||
55 | return n - remain; | |
56 | } | |
57 | ||
58 | int udbg_read(char *buf, int buflen) | |
59 | { | |
60 | char c, *p = buf; | |
61 | int i; | |
62 | ||
c8f1c8be | 63 | if (!udbg_getc) |
1da177e4 LT |
64 | return 0; |
65 | ||
66 | for (i = 0; i < buflen; ++i) { | |
67 | do { | |
c8f1c8be | 68 | c = udbg_getc(); |
1da177e4 LT |
69 | } while (c == 0x11 || c == 0x13); |
70 | if (c == 0) | |
71 | break; | |
72 | *p++ = c; | |
73 | } | |
74 | ||
75 | return i; | |
76 | } | |
77 | ||
78 | void udbg_console_write(struct console *con, const char *s, unsigned int n) | |
79 | { | |
80 | udbg_write(s, n); | |
81 | } | |
82 | ||
83 | #define UDBG_BUFSIZE 256 | |
84 | void udbg_printf(const char *fmt, ...) | |
85 | { | |
86 | unsigned char buf[UDBG_BUFSIZE]; | |
87 | va_list args; | |
88 | ||
89 | va_start(args, fmt); | |
90 | vsnprintf(buf, UDBG_BUFSIZE, fmt, args); | |
91 | udbg_puts(buf); | |
92 | va_end(args); | |
93 | } | |
94 | ||
95 | /* Special print used by PPCDBG() macro */ | |
96 | void udbg_ppcdbg(unsigned long debug_flags, const char *fmt, ...) | |
97 | { | |
98 | unsigned long active_debugs = debug_flags & ppc64_debug_switch; | |
99 | ||
100 | if (active_debugs) { | |
101 | va_list ap; | |
102 | unsigned char buf[UDBG_BUFSIZE]; | |
103 | unsigned long i, len = 0; | |
104 | ||
105 | for (i=0; i < PPCDBG_NUM_FLAGS; i++) { | |
106 | if (((1U << i) & active_debugs) && | |
107 | trace_names[i]) { | |
108 | len += strlen(trace_names[i]); | |
109 | udbg_puts(trace_names[i]); | |
110 | break; | |
111 | } | |
112 | } | |
113 | ||
114 | snprintf(buf, UDBG_BUFSIZE, " [%s]: ", current->comm); | |
115 | len += strlen(buf); | |
116 | udbg_puts(buf); | |
117 | ||
118 | while (len < 18) { | |
119 | udbg_puts(" "); | |
120 | len++; | |
121 | } | |
122 | ||
123 | va_start(ap, fmt); | |
124 | vsnprintf(buf, UDBG_BUFSIZE, fmt, ap); | |
125 | udbg_puts(buf); | |
126 | va_end(ap); | |
127 | } | |
128 | } | |
129 | ||
130 | unsigned long udbg_ifdebug(unsigned long flags) | |
131 | { | |
132 | return (flags & ppc64_debug_switch); | |
133 | } |