mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 2/4] ARM: head: Add some space behind the image header
Date: Tue, 12 Mar 2013 10:29:55 +0100	[thread overview]
Message-ID: <1363080597-10510-3-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1363080597-10510-1-git-send-email-s.hauer@pengutronix.de>

This adds 32bytes of space behind the image header (exception table
+ barebox magic) for board/SoC specific use. This can be used for
example to embed some extra information in a flashed image.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/include/asm/barebox-arm-head.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/include/asm/barebox-arm-head.h b/arch/arm/include/asm/barebox-arm-head.h
index 9d9b854..225a336 100644
--- a/arch/arm/include/asm/barebox-arm-head.h
+++ b/arch/arm/include/asm/barebox-arm-head.h
@@ -33,6 +33,13 @@ static inline void arm_cpu_lowlevel_init(void)
 	set_cr(r);
 }
 
+/*
+ * 32 bytes at this is offset is reserved in the barebox head for board/SoC
+ * usage
+ */
+#define ARM_HEAD_SPARE_OFS	0x30
+#define ARM_HEAD_SPARE_MARKER	0x55555555
+
 #ifdef CONFIG_HAVE_MACH_ARM_HEAD
 #include <mach/barebox-arm-head.h>
 #else
@@ -64,6 +71,9 @@ static inline void barebox_arm_head(void)
 							 * barebox can skip relocation
 							 */
 		".word _barebox_image_size\n"		/* image size to copy */
+		".rept 8\n"
+		".word 0x55555555\n"
+		".endr\n"
 	);
 }
 #endif
-- 
1.8.2.rc2


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

  parent reply	other threads:[~2013-03-12  9:30 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-12  9:29 [PATCH] fix i.MX external NAND boot bad block handling Sascha Hauer
2013-03-12  9:29 ` [PATCH 1/4] ARM: i.MX: external nand boot: check for bad blocks Sascha Hauer
2013-03-12  9:29 ` Sascha Hauer [this message]
2013-03-12  9:41   ` [PATCH 2/4] ARM: head: Add some space behind the image header Juergen Beisert
2013-03-12  9:29 ` [PATCH 3/4] ARM: i.MX: Add bbu handler for external NAND boot Sascha Hauer
2013-03-12  9:48   ` Juergen Beisert
2013-03-12 10:05     ` Sascha Hauer
2013-03-12 10:08       ` Juergen Beisert
2013-03-12  9:29 ` [PATCH 4/4] ARM: i.MX pcm043: register external nand boot handler 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=1363080597-10510-3-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