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authorOlaf Hering <olh@suse.de>2005-08-04 19:26:42 +0200
committerPaul Mackerras <paulus@samba.org>2005-08-29 10:53:37 +1000
commitb13cfd173f73c3f6f9a307b7b6e64d45fbd756b2 (patch)
tree47d9a6ab54c4b068e3300d026c4402c14f53d384
parentbef5686229810709091fb6e505071f4aa41e3760 (diff)
[PATCH] ppc64: allow xmon=off
If both CONFIG_XMON and CONFIG_XMON_DEFAULT is enabled in the .config, there is no way to disable xmon again. setup_system calls first xmon_init, later parse_early_param. So a new 'xmon=off' cmdline option will do the right thing. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/ppc64/kernel/setup.c8
-rw-r--r--arch/ppc64/xmon/start.c2
-rw-r--r--arch/ppc64/xmon/xmon.c28
-rw-r--r--include/asm-ppc64/system.h2
4 files changed, 26 insertions, 14 deletions
diff --git a/arch/ppc64/kernel/setup.c b/arch/ppc64/kernel/setup.c
index e9c24d2dbd9..b3ef8df1298 100644
--- a/arch/ppc64/kernel/setup.c
+++ b/arch/ppc64/kernel/setup.c
@@ -627,7 +627,7 @@ void __init setup_system(void)
* Initialize xmon
*/
#ifdef CONFIG_XMON_DEFAULT
- xmon_init();
+ xmon_init(1);
#endif
/*
* Register early console
@@ -1343,11 +1343,13 @@ static int __init early_xmon(char *p)
/* ensure xmon is enabled */
if (p) {
if (strncmp(p, "on", 2) == 0)
- xmon_init();
+ xmon_init(1);
+ if (strncmp(p, "off", 3) == 0)
+ xmon_init(0);
if (strncmp(p, "early", 5) != 0)
return 0;
}
- xmon_init();
+ xmon_init(1);
debugger(NULL);
return 0;
diff --git a/arch/ppc64/xmon/start.c b/arch/ppc64/xmon/start.c
index a9265bcc79b..f86b584acd7 100644
--- a/arch/ppc64/xmon/start.c
+++ b/arch/ppc64/xmon/start.c
@@ -27,7 +27,7 @@ static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs,
struct tty_struct *tty)
{
/* ensure xmon is enabled */
- xmon_init();
+ xmon_init(1);
debugger(pt_regs);
}
diff --git a/arch/ppc64/xmon/xmon.c b/arch/ppc64/xmon/xmon.c
index 05539439e6b..45908b10acd 100644
--- a/arch/ppc64/xmon/xmon.c
+++ b/arch/ppc64/xmon/xmon.c
@@ -2496,15 +2496,25 @@ static void dump_stab(void)
}
}
-void xmon_init(void)
-{
- __debugger = xmon;
- __debugger_ipi = xmon_ipi;
- __debugger_bpt = xmon_bpt;
- __debugger_sstep = xmon_sstep;
- __debugger_iabr_match = xmon_iabr_match;
- __debugger_dabr_match = xmon_dabr_match;
- __debugger_fault_handler = xmon_fault_handler;
+void xmon_init(int enable)
+{
+ if (enable) {
+ __debugger = xmon;
+ __debugger_ipi = xmon_ipi;
+ __debugger_bpt = xmon_bpt;
+ __debugger_sstep = xmon_sstep;
+ __debugger_iabr_match = xmon_iabr_match;
+ __debugger_dabr_match = xmon_dabr_match;
+ __debugger_fault_handler = xmon_fault_handler;
+ } else {
+ __debugger = NULL;
+ __debugger_ipi = NULL;
+ __debugger_bpt = NULL;
+ __debugger_sstep = NULL;
+ __debugger_iabr_match = NULL;
+ __debugger_dabr_match = NULL;
+ __debugger_fault_handler = NULL;
+ }
}
void dump_segments(void)
diff --git a/include/asm-ppc64/system.h b/include/asm-ppc64/system.h
index 4104a5dedba..b9e1835351e 100644
--- a/include/asm-ppc64/system.h
+++ b/include/asm-ppc64/system.h
@@ -88,7 +88,7 @@ DEBUGGER_BOILERPLATE(debugger_dabr_match)
DEBUGGER_BOILERPLATE(debugger_fault_handler)
#ifdef CONFIG_XMON
-extern void xmon_init(void);
+extern void xmon_init(int enable);
#endif
#else