From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from que02.charter.net (que02.charter.net [209.225.8.190]) by ozlabs.org (Postfix) with ESMTP id B30BCDDE41 for ; Tue, 25 Sep 2007 07:41:00 +1000 (EST) Received: from aarprv02.charter.net ([10.20.200.72]) by mtai02.charter.net (InterMail vM.7.08.03.00 201-2186-126-20070710) with ESMTP id <20070924191916.YUMJ28.mtai02.charter.net@aarprv02.charter.net> for ; Mon, 24 Sep 2007 15:19:16 -0400 Received: from DCOGLEYNEW ([71.93.35.174]) by aarprv02.charter.net with ESMTP id <20070924191914.YYCX495.aarprv02.charter.net@DCOGLEYNEW> for ; Mon, 24 Sep 2007 15:19:14 -0400 From: "Dave Cogley" To: Subject: EBC peripheral, access causing Machine Check Date: Mon, 24 Sep 2007 12:19:01 -0700 Message-ID: <005301c7fedf$c46f7770$9601a8c0@DCOGLEYNEW> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_NextPart_000_0054_01C7FEA5.18109F70" List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. ------=_NextPart_000_0054_01C7FEA5.18109F70 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0055_01C7FEA5.181A3C60" ------=_NextPart_001_0055_01C7FEA5.181A3C60 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Good Afternoon, I am using an AMCC 440EPx processor with an FPGA peripheral attached to the EBC. I am doing the entire bank configuration in the u-boot boot loader before Linux is loaded. I can directly read and write registers using memory read and write (md, nm) within area 0xC0000000 to 0xC000FFFF direct memory I/O within the context of u-boot without any faults. When I attempt to access any register in area 0xC000000 within the context of my Linux device driver I get a Machine Check fault (attached text) which appears to be an access permission violation. I am currently running the DENX ELDK 2.6.19.2 platform that was specific to the "Sequoia" platform. I have configured the EBC access permissions and control resisters as follows for bank 1: PB1CR: 0xC003C000 PB1AP: 0x80040380 Dave Cogley Software Engineer Ultra Stereo Labs, Inc. (805) 549-0161 mailto:dcogley@uslinc.com ------=_NextPart_001_0055_01C7FEA5.181A3C60 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Good Afternoon,

I am using an AMCC 440EPx processor with an FPGA = peripheral attached to the EBC. I am doing the entire bank configuration in the u-boot = boot loader before Linux is loaded. I can directly read and write = registers using memory read and write (md, nm) within area 0xC0000000 to 0xC000FFFF = direct memory I/O within the context of u-boot without any faults. When I attempt to access any register in area 0xC000000 within the context of = my Linux device driver I get a Machine Check fault (attached text) which appears = to be an access permission violation. I am currently running the DENX = ELDK 2.6.19.2 platform that was specific to the “Sequoia” = platform.

I have configured the EBC access permissions and = control resisters as follows for bank 1:

PB1CR: 0xC003C000

PB1AP: 0x80040380

Dave Cogley

Software Engineer

Ultra Stereo Labs, Inc.

(805) 549-0161

mailto:dcogley@uslinc.com

------=_NextPart_001_0055_01C7FEA5.181A3C60-- ------=_NextPart_000_0054_01C7FEA5.18109F70 Content-Type: text/plain; name="mcdump.txt" Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename="mcdump.txt" bash-3.00#=20 Machine check in kernel mode. Data Read PLB Error OPB to PLB3: BSTAT=3D 0x00000000 PLB3 to PLB4: BEAR=3D0xffffffffffffffff BESR0=3D0x00000000 = BESR1=3D0x00000000 PLB4 to PLB3: BEAR=3D0xfffffffffffffffd BESR0=3D0x00000000 = BESR1=3D0x00000000 PLB3 to OPB: BEAR=3D0xffffffff BESR0=3D0x00000000 BESR1=3D0x00000000 PLB3 arbiter: BEAR=3D0xfffffffe ACR=3D0x00000000 BESR=3D0x00000000 PLB4 to OPB1: BEAR=3D0x0000000dbfffffbf BESR0=3D0x00000000 = BESR1=3D0x00000000 PLB40 Arbiter: BEAR=3D0x00000000c0000000 ACR=3D0xda000000 = BESR0=3D0x0f000000 PLB41 Arbiter: BEAR=3D0xfffffffffffffffc ACR=3D0xdb000000 = BESR0=3D0x00000000 POB0: BEAR=3D0xc27e3194ffffffff BESR0=3D0x00000000 BESR1=3D0x00000000 OPB0: BEAR=3D0x0000000000000000 BSTAT=3D0x00000000 Oops: machine check, sig: 7 [#2] NIP: D107E2D4 LR: C0069F24 CTR: 0FF40B20 REGS: c02a9f50 TRAP: 0202 Not tainted (2.6.19.2) MSR: 00029000 CR: 40000022 XER: 00000000 TASK =3D cf6c1030[268] 'banjocore' THREAD: cf1b8000 GPR00: 40044B01 CF1B9EB0 CF6C1030 00000000 CF0EF5C0 40044B01 7F95B928 = 0FF39D08=20 GPR08: 00000000 00000000 FFFFFFE7 D1080000 80000028 10018B10 00000000 = 100D8ED8=20 GPR16: 100C0000 00000000 100C0000 10090000 00000000 100DF660 100C7C48 = 00000000=20 GPR24: 100D9038 00000000 100D8F58 40044B01 FFFFFFF7 CF0EF5C0 0FFBB73C = 7F95B928=20 NIP [D107E2D4] banjo_ioctl+0xc0/0x14c [banjodecoder] LR [C0069F24] do_ioctl+0x80/0x84 Call Trace: [CF1B9EB0] [00000001] 0x1 (unreliable) [CF1B9ED0] [C0069F24] do_ioctl+0x80/0x84 [CF1B9EE0] [C0069FB4] vfs_ioctl+0x8c/0x418 [CF1B9F10] [C006A380] sys_ioctl+0x40/0x74 [CF1B9F40] [C0001C84] ret_from_syscall+0x0/0x3c Instruction dump: 60004b00 7f850000 419e0044 3c004004 60004b01 7f850000 38600000 409eff74=20 3d60d108 812bf2a4 7c0004ac 7d204c2c <0c090000> 4c00012c 38600000 = 91260000=20 Bus error bash-3.00# ------=_NextPart_000_0054_01C7FEA5.18109F70--