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git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - arch/powerpc/kernel/udbg.c
2 * polling mode stateless debugging stuff, originally for NS16550 Serial Ports
4 * c 2001 PPC 64 Team, IBM Corp
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.
13 #include <linux/types.h>
14 #include <linux/sched.h>
15 #include <linux/console.h>
16 #include <linux/init.h>
17 #include <asm/processor.h>
20 void (*udbg_putc
)(char c
);
21 void (*udbg_flush
)(void);
22 int (*udbg_getc
)(void);
23 int (*udbg_getc_poll
)(void);
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.
29 void __init
udbg_early_init(void)
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();
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();
37 #elif defined(CONFIG_PPC_EARLY_DEBUG_G5)
38 /* For use on Apple G5 machines */
39 udbg_init_pmac_realmode();
40 #elif defined(CONFIG_PPC_EARLY_DEBUG_RTAS_PANEL)
41 /* RTAS panel debug */
42 udbg_init_rtas_panel();
43 #elif defined(CONFIG_PPC_EARLY_DEBUG_RTAS_CONSOLE)
44 /* RTAS console debug */
45 udbg_init_rtas_console();
46 #elif defined(CONFIG_PPC_EARLY_DEBUG_MAPLE)
47 /* Maple real mode debug */
48 udbg_init_maple_realmode();
49 #elif defined(CONFIG_PPC_EARLY_DEBUG_PAS_REALMODE)
50 udbg_init_pas_realmode();
51 #elif defined(CONFIG_PPC_EARLY_DEBUG_BOOTX)
53 #elif defined(CONFIG_PPC_EARLY_DEBUG_44x)
56 #elif defined(CONFIG_PPC_EARLY_DEBUG_40x)
58 udbg_init_40x_realmode();
59 #elif defined(CONFIG_PPC_EARLY_DEBUG_CPM)
61 #elif defined(CONFIG_PPC_EARLY_DEBUG_USBGECKO)
63 #elif defined(CONFIG_PPC_EARLY_DEBUG_MEMCONS)
64 /* In memory console */
66 #elif defined(CONFIG_PPC_EARLY_DEBUG_EHV_BC)
68 #elif defined(CONFIG_PPC_EARLY_DEBUG_PS3GELIC)
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();
76 #ifdef CONFIG_PPC_EARLY_DEBUG
77 console_loglevel
= CONSOLE_LOGLEVEL_DEBUG
;
79 register_early_udbg_console();
83 /* udbg library, used by xmon et al */
84 void udbg_puts(const char *s
)
89 if (s
&& *s
!= '\0') {
90 while ((c
= *s
++) != '\0')
104 int udbg_write(const char *s
, int n
)
112 if (s
&& *s
!= '\0') {
113 while (((c
= *s
++) != '\0') && (remain
-- > 0)) {
124 #define UDBG_BUFSIZE 256
125 void udbg_printf(const char *fmt
, ...)
127 char buf
[UDBG_BUFSIZE
];
131 vsnprintf(buf
, UDBG_BUFSIZE
, fmt
, args
);
136 void __init
udbg_progress(char *s
, unsigned short hex
)
143 * Early boot console based on udbg
145 static void udbg_console_write(struct console
*con
, const char *s
,
151 static struct console udbg_console
= {
153 .write
= udbg_console_write
,
154 .flags
= CON_PRINTBUFFER
| CON_ENABLED
| CON_BOOT
| CON_ANYTIME
,
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.
162 void __init
register_early_udbg_console(void)
170 if (strstr(boot_command_line
, "udbg-immortal")) {
171 printk(KERN_INFO
"early console immortal !\n");
172 udbg_console
.flags
&= ~CON_BOOT
;
174 early_console
= &udbg_console
;
175 register_console(&udbg_console
);
178 #if 0 /* if you want to use this as a regular output console */
179 console_initcall(register_udbg_console
);