[POWERPC] 4xx: Introduce cpu_setup functionality to 44x platform

This adds cpu_setup functionality for ppc44x platform.
Low level cpu-spefic initialization routines should be
placed in cpu_setup_44x.S and a callback should be
added to cputable. The cpu_setup is invoked
by identify_cpu() function at early init.

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

arch/powerpc/kernel/Makefile

@@ -58,6 +58,7 @@ obj-y				+= time.o prom.o traps.o setup-common.o \
 				   misc_$(CONFIG_WORD_SIZE).o
 obj-$(CONFIG_PPC32)		+= entry_32.o setup_32.o
 obj-$(CONFIG_PPC64)		+= dma_64.o iommu.o
+obj-$(CONFIG_44x)		+= cpu_setup_44x.o
 obj-$(CONFIG_PPC_MULTIPLATFORM)	+= prom_init.o
 obj-$(CONFIG_MODULES)		+= ppc_ksyms.o
 obj-$(CONFIG_BOOTX_TEXT)	+= btext.o

arch/powerpc/kernel/cpu_setup_44x.S

@@ -0,0 +1,19 @@
+/*
+ * This file contains low level CPU setup functions.
+ * Valentine Barshak <vbarshak@ru.mvista.com>
+ * MontaVista Software, Inc (c) 2007
+ *
+ * Based on cpu_setup_6xx code by 
+ * Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <asm/processor.h>
+#include <asm/cputable.h>
+#include <asm/ppc_asm.h>
+

arch/powerpc/kernel/cputable.c

@@ -1319,17 +1319,18 @@ struct cpu_spec *identify_cpu(unsigned long offset, unsigned int pvr)
 	for (i = 0; i < ARRAY_SIZE(cpu_specs); i++,s++)
 		if ((pvr & s->pvr_mask) == s->pvr_value) {
 			*cur = cpu_specs + i;
-#ifdef CONFIG_PPC64
-			/* ppc64 expects identify_cpu to also call setup_cpu
-			 * for that processor. I will consolidate that at a
-			 * later time, for now, just use our friend #ifdef.
+#if defined(CONFIG_PPC64) || defined(CONFIG_BOOKE)
+			/* ppc64 and booke expect identify_cpu to also call 
+			 * setup_cpu for that processor. I will consolidate
+			 * that at a later time, for now, just use #ifdef.
 			 * we also don't need to PTRRELOC the function pointer
-			 * on ppc64 as we are running at 0 in real mode.
+			 * on ppc64 and booke as we are running at 0 in real
+			 * mode on ppc64 and reloc_offset is always 0 on booke.
 			 */
 			if (s->cpu_setup) {
 				s->cpu_setup(offset, s);
 			}
-#endif /* CONFIG_PPC64 */
+#endif /* CONFIG_PPC64 || CONFIG_BOOKE */
 			return s;
 		}
 	BUG();