[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>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index 0eb0b7085e6a..e707c6f6e61b 100644
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -744,6 +744,9 @@ void __init setup_arch(char **cmdline_p)
         /* so udelay does something sensible, assume <= 1000 bogomips */
         loops_per_jiffy = 500000000 / HZ;
 
+        if (ppc_md.init_early)
+                ppc_md.init_early();
+
 #ifdef CONFIG_PPC_MULTIPLATFORM
         /* This could be called "early setup arch", it must be done
          * now because xmon need it