From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 2/4] ARM i.MX: Add support for internal serial boot mode
Date: Tue, 31 Jul 2012 20:01:48 +0200 [thread overview]
Message-ID: <1343757710-12659-3-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1343757710-12659-1-git-send-email-s.hauer@pengutronix.de>
This mode is needed for bootstrapping a board via USB serial.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
arch/arm/mach-imx/Kconfig | 10 ++++++++++
arch/arm/mach-imx/include/mach/barebox.lds.h | 12 +++++++++++-
| 9 +++++++++
3 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 5b77245..e54d498 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -101,6 +101,16 @@ config ARCH_IMX_INTERNAL_BOOT_NOR
config ARCH_IMX_INTERNAL_BOOT_ONENAND
bool "OneNAND"
+config ARCH_IMX_INTERNAL_BOOT_SERIAL
+ bool "Serial (read help)"
+ help
+ Normally the first instruction of the barebox image contains a jump
+ to the real start of the image which means that you can start it by
+ jumping to the load address. With serial boot images this is not
+ possible because the first instruction is occupied by a magic for the
+ ROM boot code. You can still start this image as a second stage loader,
+ but you have to add 0x400 to the entry point.
+
endchoice
config NAND_IMX_BOOT
diff --git a/arch/arm/mach-imx/include/mach/barebox.lds.h b/arch/arm/mach-imx/include/mach/barebox.lds.h
index a2932bd..2e60282 100644
--- a/arch/arm/mach-imx/include/mach/barebox.lds.h
+++ b/arch/arm/mach-imx/include/mach/barebox.lds.h
@@ -1,6 +1,16 @@
#ifdef CONFIG_ARCH_IMX_INTERNAL_BOOT
+#ifdef CONFIG_ARCH_IMX_INTERNAL_BOOT_SERIAL
+#define PRE_IMAGE \
+ .pre_image : { \
+ KEEP(*(.flash_header_0x0*)) \
+ KEEP(*(.dcd_entry_0x0*)) \
+ KEEP(*(.image_len_0x0*)) \
+ . = 0x400; \
+ }
+#else
+
#define PRE_IMAGE \
.pre_image : { \
KEEP(*(.flash_header_start*)) \
@@ -19,4 +29,4 @@
. = 0x2000; \
}
#endif
-
+#endif
--git a/arch/arm/mach-imx/include/mach/imx-flash-header.h b/arch/arm/mach-imx/include/mach/imx-flash-header.h
index ca2fe9f..a51d473 100644
--- a/arch/arm/mach-imx/include/mach/imx-flash-header.h
+++ b/arch/arm/mach-imx/include/mach/imx-flash-header.h
@@ -15,6 +15,11 @@
#define __dcd_entry_section __section(.dcd_entry_0x0100)
#define __image_len_section __section(.image_len_0x0100)
#define FLASH_HEADER_OFFSET 0x0100
+#elif defined(CONFIG_ARCH_IMX_INTERNAL_BOOT_SERIAL)
+ #define __flash_header_section __section(.flash_header_0x0)
+ #define __dcd_entry_section __section(.dcd_entry_0x0)
+ #define __image_len_section __section(.image_len_0x0)
+ #define FLASH_HEADER_OFFSET 0x0
#else
#define __flash_header_section __section(.flash_header_0x0400)
#define __dcd_entry_section __section(.dcd_entry_0x0400)
@@ -34,6 +39,10 @@
#define __dcd_entry_0x0400 __section(.dcd_entry_0x0400)
#define __image_len_0x0400 __section(.image_len_0x0400)
+#define __flash_header_0x0 __section(.flash_header_0x0)
+#define __dcd_entry_0x0 __section(.dcd_entry_0x0)
+#define __image_len_0x0 __section(.image_len_0x0)
+
/*
* NOR is not automatically copied anywhere by the boot ROM
*/
--
1.7.10.4
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
next prev parent reply other threads:[~2012-07-31 18:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-31 18:01 [PATCH] Freescale sabrelite support Sascha Hauer
2012-07-31 18:01 ` [PATCH 1/4] SPI i.MX: Add support for i.MX6 Sascha Hauer
2012-07-31 18:01 ` Sascha Hauer [this message]
2012-07-31 18:01 ` [PATCH 3/4] ARM i.MX: Add support for the Freescale i.MX6 sabrelite board Sascha Hauer
2012-07-31 18:01 ` [PATCH 4/4] ARM i.MX: Add defconfig for Freescale i.MX6 Sabre Lite board Sascha Hauer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1343757710-12659-3-git-send-email-s.hauer@pengutronix.de \
--to=s.hauer@pengutronix.de \
--cc=barebox@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox