mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: luigi origa <luigi.origa@gmail.com>
To: barebox@lists.infradead.org
Subject: Wrong relocation with Mini2440
Date: Fri, 10 Oct 2014 00:24:40 +0200	[thread overview]
Message-ID: <CACSabZ-OeOhLW5JC7Tk8OfryUfNx-9sZnGw16BK4kj+1AFts3g@mail.gmail.com> (raw)

I'm trying to have barebox working on my mini2440. After many test,
today i got a jtag interface and after some check i found this:

- source s3c24x0_nand_boot -
2: ldr sp, =(TEXT_BASE - SZ_2M) /* Setup a temporary stack in SDRAM */
/*
 * We still run at a location we are not linked to. But lets still running
 * from the internal SRAM, this may speed up the boot
 */
push {lr}
bl nand_boot
pop {lr}
/*
 * Adjust the return address to the correct address in SDRAM
 */
ldr r1, =(TEXT_BASE - SZ_2M)
add lr, lr, r1

mov pc, lr


- compiled s3c24x0_nand_boot -
ROM:00000320 loc_320                                 ; CODE XREF:
s3c24x0_nand_boot+10\x18j
ROM:00000320                 MOV             SP, #0x33C00000
ROM:00000324                 STMFD           SP!, {LR}
ROM:00000328                 BL              nand_boot
ROM:0000032C                 LDMFD           SP!, {LR}
ROM:00000330                 MOV             R1, #0x33C00000
ROM:00000334                 ADD             LR, LR, R1


- source nand_boot -
void __nand_boot_init nand_boot(void)
{
void *dest = _text;
int size = ld_var(_barebox_image_size);
int page = 0;

s3c24x0_nand_load_image(dest, size, page);
}


- compiled nand_boot-
ROM:000001E0                 MOV             R1, R0                  // size
ROM:000001E4                 LDR             R0, =0x33E00000 // *dest
ROM:000001E8                 MOV             R2, #0
ROM:000001EC                 LDMFD           SP!, {R4,LR}
ROM:000001F0                 B               s3c24x0_nand_load_image


0x33c00000 is the sdram stack where the program should be copied from
nand. Unfortunately the function nand_boot copy from nand to sdram
@0x33e00000.

When s3c24x0_nand_boot try to jump in sdram, use  a wrong address
(0x33c00220 instead 0x33e00220).

I don't know if the problem is in "TEXT_BASE - SZ_2M" or "_text".

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

             reply	other threads:[~2014-10-09 22:25 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-09 22:24 luigi origa [this message]
2014-10-10  6:42 ` Sascha Hauer
2014-10-10 14:25   ` luigi origa

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=CACSabZ-OeOhLW5JC7Tk8OfryUfNx-9sZnGw16BK4kj+1AFts3g@mail.gmail.com \
    --to=luigi.origa@gmail.com \
    --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