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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> | |
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 | 20 | void (*udbg_putc)(char c); |
af9c7249 | 21 | void (*udbg_flush)(void); |
bb6b9b28 | 22 | int (*udbg_getc)(void); |
c8f1c8be MM |
23 | int (*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 | */ | |
29 | void __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(); | |
d7480a9f IK |
49 | #elif defined(CONFIG_PPC_EARLY_DEBUG_BEAT) |
50 | udbg_init_debug_beat(); | |
39c870d5 OJ |
51 | #elif defined(CONFIG_PPC_EARLY_DEBUG_PAS_REALMODE) |
52 | udbg_init_pas_realmode(); | |
071df942 | 53 | #elif defined(CONFIG_PPC_EARLY_DEBUG_BOOTX) |
719c91cc | 54 | udbg_init_btext(); |
d9b55a03 DG |
55 | #elif defined(CONFIG_PPC_EARLY_DEBUG_44x) |
56 | /* PPC44x debug */ | |
57 | udbg_init_44x_as1(); | |
9dae8afd BH |
58 | #elif defined(CONFIG_PPC_EARLY_DEBUG_40x) |
59 | /* PPC40x debug */ | |
60 | udbg_init_40x_realmode(); | |
c374e00e SW |
61 | #elif defined(CONFIG_PPC_EARLY_DEBUG_CPM) |
62 | udbg_init_cpm(); | |
d1d56f8c AH |
63 | #elif defined(CONFIG_PPC_EARLY_DEBUG_USBGECKO) |
64 | udbg_init_usbgecko(); | |
30650239 AP |
65 | #elif defined(CONFIG_PPC_EARLY_DEBUG_MEMCONS) |
66 | /* In memory console */ | |
67 | udbg_init_memcons(); | |
dcd83aaf TT |
68 | #elif defined(CONFIG_PPC_EARLY_DEBUG_EHV_BC) |
69 | udbg_init_ehv_bc(); | |
c26afe9e HM |
70 | #elif defined(CONFIG_PPC_EARLY_DEBUG_PS3GELIC) |
71 | udbg_init_ps3gelic(); | |
daea1175 BH |
72 | #elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_RAW) |
73 | udbg_init_debug_opal_raw(); | |
74 | #elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_HVSI) | |
75 | udbg_init_debug_opal_hvsi(); | |
296167ae | 76 | #endif |
7ee17466 BH |
77 | |
78 | #ifdef CONFIG_PPC_EARLY_DEBUG | |
79 | console_loglevel = 10; | |
dd2e356a BH |
80 | |
81 | register_early_udbg_console(); | |
7ee17466 | 82 | #endif |
296167ae ME |
83 | } |
84 | ||
8d927391 | 85 | /* udbg library, used by xmon et al */ |
1da177e4 LT |
86 | void udbg_puts(const char *s) |
87 | { | |
c8f1c8be | 88 | if (udbg_putc) { |
1da177e4 LT |
89 | char c; |
90 | ||
91 | if (s && *s != '\0') { | |
92 | while ((c = *s++) != '\0') | |
c8f1c8be | 93 | udbg_putc(c); |
1da177e4 | 94 | } |
af9c7249 AK |
95 | |
96 | if (udbg_flush) | |
97 | udbg_flush(); | |
1da177e4 LT |
98 | } |
99 | #if 0 | |
100 | else { | |
101 | printk("%s", s); | |
102 | } | |
103 | #endif | |
104 | } | |
105 | ||
106 | int udbg_write(const char *s, int n) | |
107 | { | |
108 | int remain = n; | |
109 | char c; | |
110 | ||
c8f1c8be | 111 | if (!udbg_putc) |
1da177e4 LT |
112 | return 0; |
113 | ||
114 | if (s && *s != '\0') { | |
115 | while (((c = *s++) != '\0') && (remain-- > 0)) { | |
c8f1c8be | 116 | udbg_putc(c); |
1da177e4 LT |
117 | } |
118 | } | |
119 | ||
af9c7249 AK |
120 | if (udbg_flush) |
121 | udbg_flush(); | |
122 | ||
1da177e4 LT |
123 | return n - remain; |
124 | } | |
125 | ||
1da177e4 LT |
126 | #define UDBG_BUFSIZE 256 |
127 | void udbg_printf(const char *fmt, ...) | |
128 | { | |
51d3082f | 129 | char buf[UDBG_BUFSIZE]; |
1da177e4 LT |
130 | va_list args; |
131 | ||
132 | va_start(args, fmt); | |
133 | vsnprintf(buf, UDBG_BUFSIZE, fmt, args); | |
134 | udbg_puts(buf); | |
135 | va_end(args); | |
136 | } | |
137 | ||
be6b8439 KG |
138 | void __init udbg_progress(char *s, unsigned short hex) |
139 | { | |
140 | udbg_puts(s); | |
141 | udbg_puts("\n"); | |
142 | } | |
143 | ||
8d927391 MM |
144 | /* |
145 | * Early boot console based on udbg | |
146 | */ | |
147 | static void udbg_console_write(struct console *con, const char *s, | |
148 | unsigned int n) | |
149 | { | |
150 | udbg_write(s, n); | |
151 | } | |
152 | ||
153 | static struct console udbg_console = { | |
154 | .name = "udbg", | |
155 | .write = udbg_console_write, | |
f336632f | 156 | .flags = CON_PRINTBUFFER | CON_ENABLED | CON_BOOT | CON_ANYTIME, |
c7afb4e2 | 157 | .index = 0, |
8d927391 MM |
158 | }; |
159 | ||
220ddc08 MM |
160 | /* |
161 | * Called by setup_system after ppc_md->probe and ppc_md->early_init. | |
162 | * Call it again after setting udbg_putc in ppc_md->setup_arch. | |
163 | */ | |
282045b4 | 164 | void __init register_early_udbg_console(void) |
8d927391 | 165 | { |
d0380e6c | 166 | if (early_console) |
51d3082f | 167 | return; |
69331af7 | 168 | |
220ddc08 MM |
169 | if (!udbg_putc) |
170 | return; | |
171 | ||
69331af7 GH |
172 | if (strstr(boot_command_line, "udbg-immortal")) { |
173 | printk(KERN_INFO "early console immortal !\n"); | |
174 | udbg_console.flags &= ~CON_BOOT; | |
175 | } | |
d0380e6c | 176 | early_console = &udbg_console; |
8d927391 MM |
177 | register_console(&udbg_console); |
178 | } | |
179 | ||
180 | #if 0 /* if you want to use this as a regular output console */ | |
181 | console_initcall(register_udbg_console); | |
182 | #endif |