From: tike64 at gmail.com <tike64@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] question about TEXT_BASE in U-boot
Date: Mon, 15 Dec 2008 08:53:13 +0200 [thread overview]
Message-ID: <4945FED9.60205@gmail.com> (raw)
In-Reply-To: <1229255632.32640.10.camel@wangrui-laptop>
wangrui wrote:
> After power up board, CPU will execute the instruction store at 0x0 (ROM
> flash), and I download u-boot
> to ROM flash (start from 0x0) so that the instruction store at 0x0 is
> "a0f00000: ea000014 b a0f00058 <reset>"
>
> Then program will jump to 0xa0f00058 (SDRAM)...
No, it does not. b is a relative branch and causes a jump to 0xa0f00058
only if you execute it at 0xa0f00000. You would make yourself a big
favor by familiarizing yourself with ARM instruction set.
--
Timo
prev parent reply other threads:[~2008-12-15 6:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-14 10:14 [U-Boot] question about TEXT_BASE in U-boot 王睿
[not found] ` <5ad5c5a40812140226h642b11cal934e3dd398001276@mail.gmail.com>
2008-12-14 11:53 ` wangrui
2008-12-15 6:53 ` tike64 at gmail.com [this message]
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