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authorMatthew Wilcox <willy@parisc-linux.org>2005-10-21 22:50:06 -0400
committerKyle McMartin <kyle@parisc-linux.org>2005-10-21 22:50:06 -0400
commit7c92e972da0dd5b6a9ddf01030aab7dec9912b1f (patch)
treebd2d132c35e044e31dcab92915f202265f9d7929 /arch/parisc/kernel
parent40c72f20e89300dfaea28300ee17aa56d230d63f (diff)
[PARISC] Update pdc console from parisc tree
Get rid of some unnecessary includes Remove a layer of macro indirection around pdc_console_device Delete pdc_console_die() as it is unused Avoid double-printing on panic by clearing CON_PRINTBUFFER rather than setting con_start to be log_end Make con_start and log_end static again Signed-off-by: Matthew Wilcox <willy@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'arch/parisc/kernel')
-rw-r--r--arch/parisc/kernel/pdc_cons.c46
1 files changed, 10 insertions, 36 deletions
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 01f676d1673b..215d78c87bc5 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -41,7 +41,7 @@
41 41
42/* Define EARLY_BOOTUP_DEBUG to debug kernel related boot problems. 42/* Define EARLY_BOOTUP_DEBUG to debug kernel related boot problems.
43 * On production kernels EARLY_BOOTUP_DEBUG should be undefined. */ 43 * On production kernels EARLY_BOOTUP_DEBUG should be undefined. */
44#undef EARLY_BOOTUP_DEBUG 44#define EARLY_BOOTUP_DEBUG
45 45
46 46
47#include <linux/config.h> 47#include <linux/config.h>
@@ -49,14 +49,8 @@
49#include <linux/console.h> 49#include <linux/console.h>
50#include <linux/string.h> 50#include <linux/string.h>
51#include <linux/init.h> 51#include <linux/init.h>
52#include <linux/delay.h>
53#include <linux/sched.h>
54#include <linux/interrupt.h>
55#include <linux/major.h> 52#include <linux/major.h>
56#include <linux/tty.h> 53#include <linux/tty.h>
57#include <asm/page.h>
58#include <asm/types.h>
59#include <asm/system.h>
60#include <asm/pdc.h> /* for iodc_call() proto and friends */ 54#include <asm/pdc.h> /* for iodc_call() proto and friends */
61 55
62 56
@@ -96,7 +90,6 @@ static int pdc_console_setup(struct console *co, char *options)
96} 90}
97 91
98#if defined(CONFIG_PDC_CONSOLE) 92#if defined(CONFIG_PDC_CONSOLE)
99#define PDC_CONSOLE_DEVICE pdc_console_device
100static struct tty_driver * pdc_console_device (struct console *c, int *index) 93static struct tty_driver * pdc_console_device (struct console *c, int *index)
101{ 94{
102 extern struct tty_driver console_driver; 95 extern struct tty_driver console_driver;
@@ -104,22 +97,19 @@ static struct tty_driver * pdc_console_device (struct console *c, int *index)
104 return &console_driver; 97 return &console_driver;
105} 98}
106#else 99#else
107#define PDC_CONSOLE_DEVICE NULL 100#define pdc_console_device NULL
108#endif 101#endif
109 102
110static struct console pdc_cons = { 103static struct console pdc_cons = {
111 .name = "ttyB", 104 .name = "ttyB",
112 .write = pdc_console_write, 105 .write = pdc_console_write,
113 .device = PDC_CONSOLE_DEVICE, 106 .device = pdc_console_device,
114 .setup = pdc_console_setup, 107 .setup = pdc_console_setup,
115 .flags = CON_BOOT|CON_PRINTBUFFER|CON_ENABLED, 108 .flags = CON_BOOT | CON_PRINTBUFFER | CON_ENABLED,
116 .index = -1, 109 .index = -1,
117}; 110};
118 111
119static int pdc_console_initialized; 112static int pdc_console_initialized;
120extern unsigned long con_start; /* kernel/printk.c */
121extern unsigned long log_end; /* kernel/printk.c */
122
123 113
124static void pdc_console_init_force(void) 114static void pdc_console_init_force(void)
125{ 115{
@@ -146,27 +136,11 @@ void __init pdc_console_init(void)
146} 136}
147 137
148 138
149/* Unregister the pdc console with the printk console layer */
150void pdc_console_die(void)
151{
152 if (!pdc_console_initialized)
153 return;
154 --pdc_console_initialized;
155
156 printk(KERN_INFO "Switching from PDC console\n");
157
158 /* Don't repeat what we've already printed */
159 con_start = log_end;
160
161 unregister_console(&pdc_cons);
162}
163
164
165/* 139/*
166 * Used for emergencies. Currently only used if an HPMC occurs. If an 140 * Used for emergencies. Currently only used if an HPMC occurs. If an
167 * HPMC occurs, it is possible that the current console may not be 141 * HPMC occurs, it is possible that the current console may not be
168 * properly initialed after the PDC IO reset. This routine unregisters all 142 * properly initialised after the PDC IO reset. This routine unregisters
169 * of the current consoles, reinitializes the pdc console and 143 * all of the current consoles, reinitializes the pdc console and
170 * registers it. 144 * registers it.
171 */ 145 */
172 146
@@ -177,13 +151,13 @@ void pdc_console_restart(void)
177 if (pdc_console_initialized) 151 if (pdc_console_initialized)
178 return; 152 return;
179 153
154 /* If we've already seen the output, don't bother to print it again */
155 if (console_drivers != NULL)
156 pdc_cons.flags &= ~CON_PRINTBUFFER;
157
180 while ((console = console_drivers) != NULL) 158 while ((console = console_drivers) != NULL)
181 unregister_console(console_drivers); 159 unregister_console(console_drivers);
182 160
183 /* Don't repeat what we've already printed */
184 con_start = log_end;
185
186 /* force registering the pdc console */ 161 /* force registering the pdc console */
187 pdc_console_init_force(); 162 pdc_console_init_force();
188} 163}
189