Merge remote-tracking branch 'asoc/topic/topology' into asoc-next
[deliverable/linux.git] / arch / powerpc / kernel / udbg.c
CommitLineData
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>
1da177e4 13#include <linux/types.h>
188d2ce7 14#include <linux/sched.h>
8d927391 15#include <linux/console.h>
3b5e905e 16#include <linux/init.h>
1da177e4 17#include <asm/processor.h>
296167ae 18#include <asm/udbg.h>
1da177e4 19
51d3082f 20void (*udbg_putc)(char c);
af9c7249 21void (*udbg_flush)(void);
bb6b9b28 22int (*udbg_getc)(void);
c8f1c8be
MM
23int (*udbg_getc_poll)(void);
24
296167ae
ME
25/*
26 * Early debugging facilities. You can enable _one_ of these via .config,
27 * if you do so your kernel _will not boot_ on anything else. Be careful.
28 */
29void __init udbg_early_init(void)
30{
31#if defined(CONFIG_PPC_EARLY_DEBUG_LPAR)
32 /* For LPAR machines that have an HVC console on vterm 0 */
33 udbg_init_debug_lpar();
4d2bb3f5
BH
34#elif defined(CONFIG_PPC_EARLY_DEBUG_LPAR_HVSI)
35 /* For LPAR machines that have an HVSI console on vterm 0 */
36 udbg_init_debug_lpar_hvsi();
296167ae
ME
37#elif defined(CONFIG_PPC_EARLY_DEBUG_G5)
38 /* For use on Apple G5 machines */
39 udbg_init_pmac_realmode();
cc46bb98 40#elif defined(CONFIG_PPC_EARLY_DEBUG_RTAS_PANEL)
296167ae 41 /* RTAS panel debug */
cc46bb98
ME
42 udbg_init_rtas_panel();
43#elif defined(CONFIG_PPC_EARLY_DEBUG_RTAS_CONSOLE)
44 /* RTAS console debug */
45 udbg_init_rtas_console();
296167ae
ME
46#elif defined(CONFIG_PPC_EARLY_DEBUG_MAPLE)
47 /* Maple real mode debug */
48 udbg_init_maple_realmode();
39c870d5
OJ
49#elif defined(CONFIG_PPC_EARLY_DEBUG_PAS_REALMODE)
50 udbg_init_pas_realmode();
071df942 51#elif defined(CONFIG_PPC_EARLY_DEBUG_BOOTX)
719c91cc 52 udbg_init_btext();
d9b55a03
DG
53#elif defined(CONFIG_PPC_EARLY_DEBUG_44x)
54 /* PPC44x debug */
55 udbg_init_44x_as1();
9dae8afd
BH
56#elif defined(CONFIG_PPC_EARLY_DEBUG_40x)
57 /* PPC40x debug */
58 udbg_init_40x_realmode();
c374e00e
SW
59#elif defined(CONFIG_PPC_EARLY_DEBUG_CPM)
60 udbg_init_cpm();
d1d56f8c
AH
61#elif defined(CONFIG_PPC_EARLY_DEBUG_USBGECKO)
62 udbg_init_usbgecko();
30650239
AP
63#elif defined(CONFIG_PPC_EARLY_DEBUG_MEMCONS)
64 /* In memory console */
65 udbg_init_memcons();
dcd83aaf
TT
66#elif defined(CONFIG_PPC_EARLY_DEBUG_EHV_BC)
67 udbg_init_ehv_bc();
c26afe9e
HM
68#elif defined(CONFIG_PPC_EARLY_DEBUG_PS3GELIC)
69 udbg_init_ps3gelic();
daea1175
BH
70#elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_RAW)
71 udbg_init_debug_opal_raw();
72#elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_HVSI)
73 udbg_init_debug_opal_hvsi();
296167ae 74#endif
7ee17466
BH
75
76#ifdef CONFIG_PPC_EARLY_DEBUG
77 console_loglevel = 10;
dd2e356a
BH
78
79 register_early_udbg_console();
7ee17466 80#endif
296167ae
ME
81}
82
8d927391 83/* udbg library, used by xmon et al */
1da177e4
LT
84void udbg_puts(const char *s)
85{
c8f1c8be 86 if (udbg_putc) {
1da177e4
LT
87 char c;
88
89 if (s && *s != '\0') {
90 while ((c = *s++) != '\0')
c8f1c8be 91 udbg_putc(c);
1da177e4 92 }
af9c7249
AK
93
94 if (udbg_flush)
95 udbg_flush();
1da177e4
LT
96 }
97#if 0
98 else {
99 printk("%s", s);
100 }
101#endif
102}
103
104int udbg_write(const char *s, int n)
105{
106 int remain = n;
107 char c;
108
c8f1c8be 109 if (!udbg_putc)
1da177e4
LT
110 return 0;
111
112 if (s && *s != '\0') {
113 while (((c = *s++) != '\0') && (remain-- > 0)) {
c8f1c8be 114 udbg_putc(c);
1da177e4
LT
115 }
116 }
117
af9c7249
AK
118 if (udbg_flush)
119 udbg_flush();
120
1da177e4
LT
121 return n - remain;
122}
123
1da177e4
LT
124#define UDBG_BUFSIZE 256
125void udbg_printf(const char *fmt, ...)
126{
51d3082f 127 char buf[UDBG_BUFSIZE];
1da177e4
LT
128 va_list args;
129
130 va_start(args, fmt);
131 vsnprintf(buf, UDBG_BUFSIZE, fmt, args);
132 udbg_puts(buf);
133 va_end(args);
134}
135
be6b8439
KG
136void __init udbg_progress(char *s, unsigned short hex)
137{
138 udbg_puts(s);
139 udbg_puts("\n");
140}
141
8d927391
MM
142/*
143 * Early boot console based on udbg
144 */
145static void udbg_console_write(struct console *con, const char *s,
146 unsigned int n)
147{
148 udbg_write(s, n);
149}
150
151static struct console udbg_console = {
152 .name = "udbg",
153 .write = udbg_console_write,
f336632f 154 .flags = CON_PRINTBUFFER | CON_ENABLED | CON_BOOT | CON_ANYTIME,
c7afb4e2 155 .index = 0,
8d927391
MM
156};
157
220ddc08
MM
158/*
159 * Called by setup_system after ppc_md->probe and ppc_md->early_init.
160 * Call it again after setting udbg_putc in ppc_md->setup_arch.
161 */
282045b4 162void __init register_early_udbg_console(void)
8d927391 163{
d0380e6c 164 if (early_console)
51d3082f 165 return;
69331af7 166
220ddc08
MM
167 if (!udbg_putc)
168 return;
169
69331af7
GH
170 if (strstr(boot_command_line, "udbg-immortal")) {
171 printk(KERN_INFO "early console immortal !\n");
172 udbg_console.flags &= ~CON_BOOT;
173 }
d0380e6c 174 early_console = &udbg_console;
8d927391
MM
175 register_console(&udbg_console);
176}
177
178#if 0 /* if you want to use this as a regular output console */
179console_initcall(register_udbg_console);
180#endif
This page took 0.733258 seconds and 5 git commands to generate.