[U-Boot] [PATCH v7 05/11] arm, davinci: add support for new spl framework

Heiko Schocher hs at denx.de
Thu Nov 3 06:31:41 CET 2011


Signed-off-by: Heiko Schocher <hs at denx.de>
Cc: Albert ARIBAUD <albert.u.boot at aribaud.net>
Cc: Sandeep Paulraj <s-paulraj at ti.com>
Cc: Scott Wood <scottwood at freescale.com>
Cc: Tom Rini <trini at ti.com>

---
change for v6:
- moved arch/arm/cpu/arm926ejs/davinci/spl_nand.c to
  drivers/mtd/nand/nand_spl_load.c as Scoot Wood suggested.
  compiled through CONFIG_SPL_NAND_LOAD define

changes for v7:
- add comments from Scott Wood:
  - removed unnecessary inline
  - add only a comment after #ifdef CONFIG_SPL_BUILD that says:
    /* not set with legacy CONFIG_NAND_SPL */
  - replaced tab with space in drivers/mtd/nand/Makefile
  - changed indent/alignment in drivers/mtd/nand/nand_spl_load.c

 Makefile                                |    8 +++-
 arch/arm/cpu/arm926ejs/davinci/Makefile |    5 ++
 arch/arm/cpu/arm926ejs/davinci/spl.c    |   63 +++++++++++++++++++++++++++++++
 arch/arm/cpu/arm926ejs/start.S          |   19 +++++++++-
 doc/README.SPL                          |    1 +
 drivers/mtd/nand/Makefile               |    3 +
 drivers/mtd/nand/nand_spl_load.c        |   56 +++++++++++++++++++++++++++
 7 files changed, 152 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm/cpu/arm926ejs/davinci/spl.c
 create mode 100644 drivers/mtd/nand/nand_spl_load.c

diff --git a/Makefile b/Makefile
index 9ef33f9..46a6e78 100644
--- a/Makefile
+++ b/Makefile
@@ -415,9 +415,13 @@ $(obj)u-boot.sha1:	$(obj)u-boot.bin
 $(obj)u-boot.dis:	$(obj)u-boot
 		$(OBJDUMP) -d $< > $@
 
-$(obj)u-boot.ubl:       $(obj)u-boot-nand.bin
+$(obj)u-boot.ubl:       $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
+		$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(PAD_TO) -O binary $(obj)spl/u-boot-spl $(obj)spl/u-boot-spl-pad.bin
+		cat $(obj)spl/u-boot-spl-pad.bin $(obj)u-boot.bin > $(obj)u-boot-ubl.bin
 		$(obj)tools/mkimage -n $(UBL_CONFIG) -T ublimage \
-		-e $(CONFIG_SYS_TEXT_BASE) -d $< $@
+		-e $(CONFIG_SYS_TEXT_BASE) -d $(obj)u-boot-ubl.bin $(obj)u-boot.ubl
+		rm $(obj)u-boot-ubl.bin
+		rm $(obj)spl/u-boot-spl-pad.bin
 
 ifeq ($(CONFIG_SANDBOX),y)
 GEN_UBOOT = \
diff --git a/arch/arm/cpu/arm926ejs/davinci/Makefile b/arch/arm/cpu/arm926ejs/davinci/Makefile
index 0310957..98c7e55 100644
--- a/arch/arm/cpu/arm926ejs/davinci/Makefile
+++ b/arch/arm/cpu/arm926ejs/davinci/Makefile
@@ -35,6 +35,11 @@ COBJS-$(CONFIG_SOC_DM644X)	+= dm644x.o
 COBJS-$(CONFIG_SOC_DM646X)	+= dm646x.o
 COBJS-$(CONFIG_DRIVER_TI_EMAC)	+= lxt972.o dp83848.o et1011c.o ksz8873.o
 
+ifdef CONFIG_SPL_BUILD
+COBJS-y	+= spl.o
+COBJS-y	+= dm365_lowlevel.o
+endif
+
 SOBJS	= reset.o
 
 ifndef CONFIG_SKIP_LOWLEVEL_INIT
diff --git a/arch/arm/cpu/arm926ejs/davinci/spl.c b/arch/arm/cpu/arm926ejs/davinci/spl.c
new file mode 100644
index 0000000..db69be8
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/davinci/spl.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2011
+ * Heiko Schocher, DENX Software Engineering, hs at 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/u-boot.h>
+#include <asm/utils.h>
+#include <nand.h>
+#include <asm/arch/dm365_lowlevel.h>
+#include <ns16550.h>
+
+void puts(const char *str)
+{
+	while (*str)
+		putc(*str++);
+}
+
+void putc(char c)
+{
+	if (c == '\n')
+		NS16550_putc((NS16550_t)(CONFIG_SYS_NS16550_COM1), '\r');
+
+	NS16550_putc((NS16550_t)(CONFIG_SYS_NS16550_COM1), c);
+}
+
+void hang(void)
+{
+	puts("### ERROR ### Please RESET the board ###\n");
+	for (;;)
+		;
+}
+
+void board_init_f(ulong dummy)
+{
+	dm36x_lowlevel_init(0);
+	relocate_code(CONFIG_SPL_STACK, NULL, CONFIG_SPL_TEXT_BASE);
+}
+
+void board_init_r(gd_t *id, ulong dummy)
+{
+
+	nand_init();
+	puts("Nand boot...\n");
+	nand_boot();
+}
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 86a0dc2..5ffc653 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -126,7 +126,12 @@ _fiq:
 
 .globl _TEXT_BASE
 _TEXT_BASE:
+#ifdef CONFIG_SPL_BUILD
+	/* not set with legacy CONFIG_NAND_SPL */
+	.word	CONFIG_SPL_TEXT_BASE
+#else
 	.word	CONFIG_SYS_TEXT_BASE
+#endif
 
 /*
  * These are defined in the board-specific linker script.
@@ -192,7 +197,12 @@ reset:
 
 /* Set stackpointer in internal RAM to call board_init_f */
 call_board_init_f:
+#ifdef CONFIG_SPL_BUILD
+	/* not set with legacy CONFIG_NAND_SPL */
+	ldr	sp, =(CONFIG_SPL_STACK)
+#else
 	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
+#endif
 	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
 	ldr	r0,=0x00000000
 	bl	board_init_f
@@ -217,6 +227,7 @@ stack_setup:
 	mov	sp, r4
 
 	adr	r0, _start
+	sub	r9, r6, r0		/* r9 <- relocation offset */
 	cmp	r0, r6
 	beq	clear_bss		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy loop */
@@ -271,12 +282,17 @@ fixnext:
 #endif
 
 clear_bss:
-#ifndef CONFIG_SPL_BUILD
+#ifdef CONFIG_SPL_BUILD
+	/* No relocation for SPL */
+	ldr	r0, =__bss_start
+	ldr	r1, =__bss_end__
+#else
 	ldr	r0, _bss_start_ofs
 	ldr	r1, _bss_end_ofs
 	mov	r4, r6			/* reloc addr */
 	add	r0, r0, r4
 	add	r1, r1, r4
+#endif
 	mov	r2, #0x00000000		/* clear			    */
 
 clbss_l:str	r2, [r0]		/* clear loop...		    */
@@ -284,6 +300,7 @@ clbss_l:str	r2, [r0]		/* clear loop...		    */
 	cmp	r0, r1
 	bne	clbss_l
 
+#ifndef CONFIG_SPL_BUILD
 	bl coloured_LED_init
 	bl red_led_on
 #endif
diff --git a/doc/README.SPL b/doc/README.SPL
index b460e84..89d24a7 100644
--- a/doc/README.SPL
+++ b/doc/README.SPL
@@ -64,3 +64,4 @@ CONFIG_SPL_POWER_SUPPORT (drivers/power/libpower.o)
 CONFIG_SPL_NAND_SUPPORT (drivers/mtd/nand/libnand.o)
 CONFIG_SPL_DMA_SUPPORT (drivers/dma/libdma.o)
 CONFIG_SPL_POST_MEM_SUPPORT (post/drivers/memory.o)
+CONFIG_SPL_NAND_LOAD (drivers/mtd/nand/nand_spl_load.o)
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 1eeba5c..e80da62 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -30,6 +30,9 @@ ifdef CONFIG_SPL_BUILD
 ifdef CONFIG_SPL_NAND_SIMPLE
 COBJS-y += nand_spl_simple.o
 endif
+ifdef CONFIG_SPL_NAND_LOAD
+COBJS-y += nand_spl_load.o
+endif
 else
 COBJS-y += nand.o
 COBJS-y += nand_bbt.o
diff --git a/drivers/mtd/nand/nand_spl_load.c b/drivers/mtd/nand/nand_spl_load.c
new file mode 100644
index 0000000..d7f6f10
--- /dev/null
+++ b/drivers/mtd/nand/nand_spl_load.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2011
+ * Heiko Schocher, DENX Software Engineering, hs at denx.de.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <nand.h>
+
+/*
+ * The main entry for NAND booting. It's necessary that SDRAM is already
+ * configured and available since this code loads the main U-Boot image
+ * from NAND into SDRAM and starts it from there.
+ */
+void nand_boot(void)
+{
+	int ret;
+	__attribute__((noreturn)) void (*uboot)(void);
+
+	/*
+	 * Load U-Boot image from NAND into RAM
+	 */
+	ret =  nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
+			CONFIG_SYS_NAND_U_BOOT_SIZE,
+			(void *)CONFIG_SYS_NAND_U_BOOT_DST);
+
+#ifdef CONFIG_NAND_ENV_DST
+	ret =  nand_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
+		(void *)CONFIG_NAND_ENV_DST);
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	ret =  nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, CONFIG_ENV_SIZE,
+		(void *)CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE);
+#endif
+#endif
+
+	/*
+	 * Jump to U-Boot image
+	 */
+	uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
+	(*uboot)();
+}
-- 
1.7.6.4



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