From: Dan Malek <dan@netx4.com>
To: Pavel Roskin <proski@gnu.org>
Cc: Dan Malek <dan@netx4.com>, "Mark S. Mathews" <mark@absoval.com>,
linuxppc-embedded@lists.linuxppc.org
Subject: Re: Can't mmap the top 1MB of /dev/mem?
Date: Thu, 22 Jun 2000 14:54:29 -0400 [thread overview]
Message-ID: <395260E5.C7592DE3@embeddededge.com> (raw)
In-Reply-To: Pine.LNX.4.21.0006221435370.3102-100000@sunapee.transcept.com
Pavel Roskin wrote:
> I know that program. FLASH_MEM_SIZE is a small number used only in the
> first mmap() to determine the size of the flash.
Yes, but then it re-maps based upon the flash devices found....but I'll
bet I don't map the top boot sector.......
> ..... If you make it so big
> that (int)(FLASH_MEM_ADDR+FLASH_MEM_SIZE)==0 then mmap() fails.
So, this should be a pretty obvious boundary condition bug in
drivers/char/mem.c or one of the Linux MM functions. You want to
learn about MMUs? Go check some of those files for inspiration......
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-06-22 18:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-06-22 17:15 Can't mmap the top 1MB of /dev/mem? Mark S. Mathews
2000-06-22 17:43 ` Dan Malek
2000-06-22 18:47 ` Pavel Roskin
2000-06-22 18:54 ` Dan Malek [this message]
2000-06-22 19:58 ` Pavel Roskin
2000-06-22 21:46 ` Dan Malek
2000-06-22 19:00 ` Mark S. Mathews
2000-06-22 19:37 ` Pavel Roskin
2000-06-22 19:50 ` Mark S. Mathews
2000-06-22 20:24 ` Pavel Roskin
2000-06-22 17:50 ` Pavel Roskin
2000-06-22 18:14 ` Frank Smith
2000-06-22 18:37 ` Dan Malek
2000-06-22 19:06 ` Frank Smith
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