Commit 84e3ad5b authored by Valentine Barshak's avatar Valentine Barshak Committed by Josh Boyer
Browse files

[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: default avatarValentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
parent 2e71cc0d

arch/powerpc/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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 → 100644
+19 −0
Original line number Diff line number Diff line 
/*

 * 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

+7 −6
Original line number Diff line number Diff line
@@ -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();

CRA Git | Maintained and supported by SUSTech CRA and CCSE