[POWERPC] Use udbg_early_init() on ppc32

udbg_early_init() is a function used on 64 bit systems, which
initializes whichever early udbg backend is configured.  This function
is not called on 32-bit, however if btext early debug is enabled it
does have an explicit, inline, #ifdef-ed assignment performing
analagous initialization.

This patch makes things more uniform by folding the btext
initialization as an option into udbg_early_init() and calling that
from the 32-bit setup path.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index 93f21aa..3678997 100644 (file)
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -18,6 +18,7 @@
 #include <asm/io.h>
 #include <asm/lmb.h>
 #include <asm/processor.h>
+#include <asm/udbg.h>
 
 #define NO_SCROLL
 
@@ -912,3 +913,11 @@ static unsigned char vga_font[cmapsz] = {
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 0x00, 0x00, 0x00, 0x00,
 };
+
+void __init udbg_init_btext(void)
+{
+       /* If btext is enabled, we might have a BAT setup for early display,
+        * thus we do enable some very basic udbg output
+        */
+       udbg_putc = btext_drawchar;
+}

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 6a19fa4..44a6a3c 100644 (file)
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -116,12 +116,8 @@ unsigned long __init early_init(unsigned long dt_ptr)
  */
 void __init machine_init(unsigned long dt_ptr, unsigned long phys)
 {
-       /* If btext is enabled, we might have a BAT setup for early display,
-        * thus we do enable some very basic udbg output
-        */
-#ifdef CONFIG_BOOTX_TEXT
-       udbg_putc = btext_drawchar;
-#endif
+       /* Enable early debugging if any specified (see udbg.h) */
+       udbg_early_init();
 
        /* Do some early initialization based on the flat device tree */
        early_init_devtree(__va(dt_ptr));

diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 194a93e..7e09718 100644 (file)
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -49,6 +49,8 @@ void __init udbg_early_init(void)
        udbg_init_debug_beat();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_PAS_REALMODE)
        udbg_init_pas_realmode();
+#elif defined(CONFIG_BOOTX_TEXT)
+       udbg_init_btext();
 #endif
 }
 

diff --git a/include/asm-powerpc/udbg.h b/include/asm-powerpc/udbg.h
index 4cbc313..d03d855 100644 (file)
--- a/include/asm-powerpc/udbg.h
+++ b/include/asm-powerpc/udbg.h
@@ -46,6 +46,7 @@ extern void __init udbg_init_iseries(void);
 extern void __init udbg_init_rtas_panel(void);
 extern void __init udbg_init_rtas_console(void);
 extern void __init udbg_init_debug_beat(void);
+extern void __init udbg_init_btext(void);
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_UDBG_H */