[PATCH] powerpc: Unify udbg (#2)
This patch unifies udbg for both ppc32 and ppc64 when building the
merged achitecture. xmon now has a single "back end". The powermac udbg
stuff gets enriched with some ADB capabilities and btext output. In
addition, the early_init callback is now called on ppc32 as well,
approx. in the same order as ppc64 regarding device-tree manipulations.
The init sequences of ppc32 and ppc64 are getting closer, I'll unify
them in a later patch.
For now, you can force udbg to the scc using "sccdbg" or to btext using
"btextdbg" on powermacs. I'll implement a cleaner way of forcing udbg
output to something else than the autodetected OF output device in a
later patch.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 2e37247..cc2df5e 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -16,8 +16,8 @@
#include <linux/console.h>
#include <asm/processor.h>
-void (*udbg_putc)(unsigned char c);
-unsigned char (*udbg_getc)(void);
+void (*udbg_putc)(char c);
+char (*udbg_getc)(void);
int (*udbg_getc_poll)(void);
/* udbg library, used by xmon et al */
@@ -78,7 +78,7 @@
#define UDBG_BUFSIZE 256
void udbg_printf(const char *fmt, ...)
{
- unsigned char buf[UDBG_BUFSIZE];
+ char buf[UDBG_BUFSIZE];
va_list args;
va_start(args, fmt);
@@ -116,6 +116,8 @@
/* called by setup_system */
void register_early_udbg_console(void)
{
+ if (early_console_initialized)
+ return;
early_console_initialized = 1;
register_console(&udbg_console);
}