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authorStefan Roese <sr@denx.de>2012-08-23 08:34:21 +0200
committerStefan Roese <sr@denx.de>2012-12-05 17:30:22 +0100
commitea8256f072ccc04c83fa10030673cdd4cd01cbd9 (patch)
tree85d8f4dbeb70c33a9be4a6bfb7fd9cc259bde15d
parent966b11c74909d2c1b38070dc4ab5708fba5be43d (diff)
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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>
-rw-r--r--arch/powerpc/lib/Makefile4
-rw-r--r--arch/powerpc/lib/spl.c42
-rw-r--r--common/spl/spl.c16
3 files changed, 62 insertions, 0 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 20c5c38..bf40676 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -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) \
diff --git a/arch/powerpc/lib/spl.c b/arch/powerpc/lib/spl.c
new file mode 100644
index 0000000..502c93b
--- /dev/null
+++ b/arch/powerpc/lib/spl.c
@@ -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 */
diff --git a/common/spl/spl.c b/common/spl/spl.c
index f068abd..ff9ba7b 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -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();