All of lore.kernel.org
 help / color / mirror / Atom feed
From: ipif <ipif@ymail.com>
To: sparclinux@vger.kernel.org
Subject: alloc_io_res: cannot occupy / paging request fails
Date: Tue, 14 Apr 2009 12:00:41 +0000	[thread overview]
Message-ID: <23038125.post@talk.nabble.com> (raw)


Hi,

I'm trying to get MTD support working on my embedded sparc (leon3, V8).
There are 32MB of flash on the board I want to utilize starting at 0x0. The
corresponding kernel options are:
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_PHYSMAP_START=0x00000000
CONFIG_MTD_PHYSMAP_LEN=0x02000000
With these options the kernel stops booting with
"alloc_io_res(phys_00000000): cannot occupy".
So I changed IOBASE_END and VMALLOC_START from 0xfe600000 to 0xff400000 in
include/asm-sparc/vaddrs.h. And voila, the kernel boots fine. But when I Try
to access the flash with dd the following happens:

Unable to handle kernel paging request at virtual address fe640000
tsk->{mm,active_mm}->context = 000000ae
tsk->{mm,active_mm}->pgd = fc01f400
              \|/ ____ \|/
              "@'/ ,. \`@"
              /_| \__/ |_\
                 \__U_/
dd(2616): Oops [#1]
PSR: f30000c2 PC: f01b543c NPC: f01b5440 Y: 00000000    Not tainted
PC: <cfi_intelext_read+0x158/0x1b4>
%G: fbd77d70 00000000  00000000 fe640000  00000000 00000000  fbd76000
00000000
%O: 00000000 00000000  01640000 00000000  00032000 01640000  fbd77d78
f01b53dc
RPC: <cfi_intelext_read+0xf8/0x1b4>
%L: 00000200 00000000  f0034ce4 01640000  f0ae39e0 f0b0c3e4  fbd76000
0005d000
%I: 00000000 01640000  f0ae3a18 00000200  fbd77e64 fbd16200  fbd77de0
f01ad1c0
Caller[f01ad1c0]: mtd_read+0xf8/0x23c
Caller[f007607c]: vfs_read+0x9c/0x140
Caller[f0076598]: sys_read+0x38/0x64
Caller[f0011310]: syscall_is_too_hard+0x3c/0x40
Caller[00011b20]: 0x11b28
Instruction DUMP: c405600c  86008013  84102000 <c208c002> c228801d  8400a001 
80a08010  12bffffc  94100019

Thanks,
-jan

-- 
View this message in context: http://www.nabble.com/alloc_io_res%3A-cannot-occupy---paging-request-fails-tp23038125p23038125.html
Sent from the sparclinux mailing list archive at Nabble.com.


                 reply	other threads:[~2009-04-14 12:00 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=23038125.post@talk.nabble.com \
    --to=ipif@ymail.com \
    --cc=sparclinux@vger.kernel.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.