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SPL: Port SPL framework to powerpc 

This patch enables the SPL framework to be used on powerpc platforms
and not only ARM.

timer_init() does not exist on PPC systems. The timer (decrementer) is
initialized and enabled in interrupt_init() here. And currently
interrupt_init() is called after relocation to SDRAM. Since the only
powerpc SPL implementation (a3m071) doesn't need a timer, let's remove
this timer_init() call for PPC systems.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2012-08-23 08:34:21 +02:00
parent 966b11c749
commit ea8256f072
3 changed files with 62 additions and 0 deletions
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4
arch/powerpc/lib/Makefile
View File

@ -79,6 +79,10 @@ endif
endif # not minimal
ifdef CONFIG_SPL_BUILD
COBJS-$(CONFIG_SPL_FRAMEWORK) += spl.o
endif
COBJS += $(sort $(COBJS-y))
SRCS := $(GLSOBJS:.o=.S) $(GLCOBJS:.o=.c) \

42
arch/powerpc/lib/spl.c Normal file
View File

@ -0,0 +1,42 @@
/*
* Copyright 2012 Stefan Roese <sr@denx.de>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <config.h>
#include <spl.h>
#include <image.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* This function jumps to an image with argument. Normally an FDT or ATAGS
* image.
* arg: Pointer to paramter image in RAM
*/
#ifdef CONFIG_SPL_OS_BOOT
void __noreturn jump_to_image_linux(void *arg)
{
debug("Entering kernel arg pointer: 0x%p\n", arg);
typedef void (*image_entry_arg_t)(void *, ulong r4, ulong r5, ulong r6,
ulong r7, ulong r8, ulong r9)
__attribute__ ((noreturn));
image_entry_arg_t image_entry =
(image_entry_arg_t)spl_image.entry_point;
image_entry(arg, 0, 0, EPAPR_MAGIC, CONFIG_SYS_BOOTMAPSZ, 0, 0);
}
#endif /* CONFIG_SPL_OS_BOOT */

16
common/spl/spl.c
View File

@ -74,6 +74,16 @@ __weak int spl_start_uboot(void)
}
#endif
/*
* Weak default function for board specific cleanup/preparation before
* Linux boot. Some boards/platforms might not need it, so just provide
* an empty stub here.
*/
__weak void spl_board_prepare_for_linux(void)
{
/* Nothing to do! */
}
void spl_parse_image_header(const struct image_header *header)
{
u32 header_size = sizeof(struct image_header);
@ -155,7 +165,13 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
CONFIG_SYS_SPL_MALLOC_SIZE);
#endif
#ifndef CONFIG_PPC
/*
* timer_init() does not exist on PPC systems. The timer is initialized
* and enabled (decrementer) in interrupt_init() here.
*/
timer_init();
#endif
#ifdef CONFIG_SPL_BOARD_INIT
spl_board_init();