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Re: Linux for MIPS Atlas 4Kc board

To: linux-mips@linux-mips.org
Subject: Re: Linux for MIPS Atlas 4Kc board
From: "Michael Anburaj" <michaelanburaj@hotmail.com>
Date: Sun, 04 May 2003 17:27:25 -0700
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
Hi,

Finally, I could compile vmlinux. I thought of booting this RAM image (or its SREC equivalent) using the onboard YAMON (in BIG endian mode - I am having trouble building Redboot in BIG endian mode <issue ported at ecos forum>, so for now thought of using YAMON). After downloding the vmlinux.srec over the serial port (Starting at 0x80100000), I issued the go command to run the image. I get the following message:

YAMON> go

LINUX started...

* Exception (user) : Reserved instruction *
BadVAddr = 0x00000000  Cause    = 0x00808028
Compare  = 0x00061a80  Config   = 0x80038083
Config1  = 0x1e9b4d8a  Context  = 0x63800000
Count    = 0xb9188fd8  DEPC     = 0x21424255
Debug    = 0x0400dc0b  EPC      = 0x80122258
EntryHi  = 0x00000068  EntryLo0 = 0x028ff72e
EntryLo1 = 0x035a241f  ErrorEPC = 0x8003add0
Index    = 0x0000000b  PRId     = 0x00018001
PageMask = 0x01b90000  Random   = 0x0000000d
Status   = 0x00000402  WatchHi  = 0x00000000
WatchLo  = 0x00000000  Wired    = 0x00000000
Hi       = 0x00000000  Lo       = 0x04000000

$ 0(zr):0x00000000 $ 8(t0):0x00000000 $16(s0):0x802d810a $24(t8):0xffffffff $ 1(at):0x80280000 $ 9(t1):0x00000000 $17(s1):0x802d810c $25(t9):0x802c1e94 $ 2(v0):0x0000000a $10(t2):0x8024f401 $18(s2):0x00000400 $26(k0):0x00000000 $ 3(v1):0x00000000 $11(t3):0x00000000 $19(s3):0x00000001 $27(k1):0x00000000 $ 4(a0):0x00000000 $12(t4):0x00000000 $20(s4):0x0000001a $28(gp):0x802c0000 $ 5(a1):0x80280000 $13(t5):0x00000000 $21(s5):0x0000000a $29(sp):0x802c1f58 $ 6(a2):0x8024385a $14(t6):0x802d8109 $22(s6):0x0000003e $30(s8):0x800b1080 $ 7(a3):0x00000000 $15(t7):0xfffffffe $23(s7):0x0000003c $31(ra):0x80122230


The linux image started fine, but caused an exception after a while. Is this because Linux is not compatible with YAMON? If so, what are the possible monitor programs that can go with Linux? Please point me to the documents in this regard (documents on running Linux executable on Atlas 4Kc board).

Or will Linux work with any ROM monitor? If so, please let me know the reason for the exception.

Thanks a lot,
-Mike.

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