diff mbox

[U-Boot,v2,04/10] arm, davinci: add support for new spl framework

Message ID 1317824890-8642-1-git-send-email-hs@denx.de
State Superseded
Headers show

Commit Message

Heiko Schocher Oct. 5, 2011, 2:28 p.m. UTC 
Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
---
 Makefile                                  |    8 +++-
 arch/arm/cpu/arm926ejs/davinci/Makefile   |    8 ++++
 arch/arm/cpu/arm926ejs/davinci/spl.c      |   63 +++++++++++++++++++++++++++++
 arch/arm/cpu/arm926ejs/davinci/spl_nand.c |   57 ++++++++++++++++++++++++++
 arch/arm/cpu/arm926ejs/start.S            |   25 +++++++++++-
 5 files changed, 158 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm/cpu/arm926ejs/davinci/spl.c
 create mode 100644 arch/arm/cpu/arm926ejs/davinci/spl_nand.c

Comments

Christian Riesch Oct. 6, 2011, 6:57 a.m. UTC | #1 
Hello Heiko,

On Wed, Oct 5, 2011 at 4:28 PM, Heiko Schocher <hs@denx.de> wrote:
> Signed-off-by: Heiko Schocher <hs@denx.de>
> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
> Cc: Sandeep Paulraj <s-paulraj@ti.com>
> ---
>  Makefile                                  |    8 +++-
>  arch/arm/cpu/arm926ejs/davinci/Makefile   |    8 ++++
>  arch/arm/cpu/arm926ejs/davinci/spl.c      |   63 +++++++++++++++++++++++++++++
>  arch/arm/cpu/arm926ejs/davinci/spl_nand.c |   57 ++++++++++++++++++++++++++
>  arch/arm/cpu/arm926ejs/start.S            |   25 +++++++++++-
>  5 files changed, 158 insertions(+), 3 deletions(-)
>  create mode 100644 arch/arm/cpu/arm926ejs/davinci/spl.c
>  create mode 100644 arch/arm/cpu/arm926ejs/davinci/spl_nand.c

[...]

> diff --git a/arch/arm/cpu/arm926ejs/davinci/spl.c b/arch/arm/cpu/arm926ejs/davinci/spl.c
> new file mode 100644
> index 0000000..d9b9398
> --- /dev/null
> +++ b/arch/arm/cpu/arm926ejs/davinci/spl.c

[...]

> +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);
> +}
> +

Are these functions really required? I am currently also working on an
SPL for davinci (the AM1808 SoC) and had a look at the code in
arch/arm/cpu/armv7/omap-common/spl.c:

        gd = &gdata;
        gd->bd = &bdata;
        gd->flags |= GD_FLG_RELOC;
        gd->baudrate = CONFIG_BAUDRATE;

        serial_init();          /* serial communications setup */

After that they use putc, printf... from common/console.c

However, I had to add a gd->have_console = true; to the code above
since this is required due to commit
e3e454cd72f319908355427b1a3ae54b3dd53356.

Regards, Christian
Heiko Schocher Oct. 6, 2011, 7:52 a.m. UTC | #2 
Hello Christian,

Christian Riesch wrote:
> Hello Heiko,
> 
> On Wed, Oct 5, 2011 at 4:28 PM, Heiko Schocher <hs@denx.de> wrote:
>> Signed-off-by: Heiko Schocher <hs@denx.de>
>> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
>> Cc: Sandeep Paulraj <s-paulraj@ti.com>
>> ---
>>  Makefile                                  |    8 +++-
>>  arch/arm/cpu/arm926ejs/davinci/Makefile   |    8 ++++
>>  arch/arm/cpu/arm926ejs/davinci/spl.c      |   63 +++++++++++++++++++++++++++++
>>  arch/arm/cpu/arm926ejs/davinci/spl_nand.c |   57 ++++++++++++++++++++++++++
>>  arch/arm/cpu/arm926ejs/start.S            |   25 +++++++++++-
>>  5 files changed, 158 insertions(+), 3 deletions(-)
>>  create mode 100644 arch/arm/cpu/arm926ejs/davinci/spl.c
>>  create mode 100644 arch/arm/cpu/arm926ejs/davinci/spl_nand.c
> 
> [...]
> 
>> diff --git a/arch/arm/cpu/arm926ejs/davinci/spl.c b/arch/arm/cpu/arm926ejs/davinci/spl.c
>> new file mode 100644
>> index 0000000..d9b9398
>> --- /dev/null
>> +++ b/arch/arm/cpu/arm926ejs/davinci/spl.c
> 
> [...]
> 
>> +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);
>> +}
>> +
> 
> Are these functions really required? I am currently also working on an
> SPL for davinci (the AM1808 SoC) and had a look at the code in
> arch/arm/cpu/armv7/omap-common/spl.c:

Yes, I know this code, but the disadvantage of it is, you need
printf(), which blows up code. I only use puts(), which result
in a smaller code.

>         gd = &gdata;
>         gd->bd = &bdata;
>         gd->flags |= GD_FLG_RELOC;
>         gd->baudrate = CONFIG_BAUDRATE;
> 
>         serial_init();          /* serial communications setup */
> 
> After that they use putc, printf... from common/console.c

see above comment, I don;t want to use this code ... also I don;t need
the gd pointer at all in spl ...

> However, I had to add a gd->have_console = true; to the code above
> since this is required due to commit
> e3e454cd72f319908355427b1a3ae54b3dd53356.

bye,
Heiko
Wolfgang Denk Oct. 6, 2011, 7:59 a.m. UTC | #3 
Dear Christian Riesch,

In message <CABkLObrZtiGdQEpP2sxdJy6PgDgb3qRszi8b7npBCHBYr9af=w@mail.gmail.com> you wrote:
> 
> However, I had to add a gd->have_console = true; to the code above
> since this is required due to commit
> e3e454cd72f319908355427b1a3ae54b3dd53356.

I think this is a bad idea.  Instead, you should make sure to run
console_init_f() at the right place.

Best regards,

Wolfgang Denk
diff mbox

Patch

diff --git a/Makefile b/Makefile
index ddcf533..cc4a036 100644
--- a/Makefile
+++ b/Makefile
@@ -396,9 +396,13 @@  $(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
 
 GEN_UBOOT = \
 		UNDEF_SYM=`$(OBJDUMP) -x $(LIBBOARD) $(LIBS) | \
diff --git a/arch/arm/cpu/arm926ejs/davinci/Makefile b/arch/arm/cpu/arm926ejs/davinci/Makefile
index 0310957..d9e71bc 100644
--- a/arch/arm/cpu/arm926ejs/davinci/Makefile
+++ b/arch/arm/cpu/arm926ejs/davinci/Makefile
@@ -35,6 +35,14 @@  COBJS-$(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
+ifdef CONFIG_SPL_NAND_SUPPORT
+COBJS-y	+= spl_nand.o
+endif
+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..d9b9398
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/davinci/spl.c
@@ -0,0 +1,63 @@ 
+/*
+ * Copyright (C) 2011
+ * Heiko Schocher, DENX Software Engineering, hs@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);
+}
+
+inline 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/davinci/spl_nand.c b/arch/arm/cpu/arm926ejs/davinci/spl_nand.c
new file mode 100644
index 0000000..efc0521
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/davinci/spl_nand.c
@@ -0,0 +1,57 @@ 
+/*
+ * Copyright (C) 2011
+ * Heiko Schocher, DENX Software Engineering, hs@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>
+#include <asm/io.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)();
+}
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 86a0dc2..339c5ed 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -126,7 +126,15 @@  _fiq:
 
 .globl _TEXT_BASE
 _TEXT_BASE:
+#ifdef CONFIG_NAND_SPL /* deprecated, use instead CONFIG_SPL_BUILD */
 	.word	CONFIG_SYS_TEXT_BASE
+#else
+#ifdef CONFIG_SPL_BUILD
+	.word	CONFIG_SPL_TEXT_BASE
+#else
+	.word	CONFIG_SYS_TEXT_BASE
+#endif
+#endif
 
 /*
  * These are defined in the board-specific linker script.
@@ -192,7 +200,15 @@  reset:
 
 /* Set stackpointer in internal RAM to call board_init_f */
 call_board_init_f:
+#ifdef CONFIG_NAND_SPL /* deprecated, use instead CONFIG_SPL_BUILD */
+	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
+#else
+#ifdef CONFIG_SPL_BUILD
+	ldr	sp, =(CONFIG_SPL_STACK)
+#else
 	ldr	sp, =(CONFIG_SYS_INIT_SP_ADDR)
+#endif
+#endif
 	bic	sp, sp, #7 /* 8-byte alignment for ABI compliance */
 	ldr	r0,=0x00000000
 	bl	board_init_f
@@ -217,6 +233,7 @@  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 +288,17 @@  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 +306,7 @@  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