From: "Gong Zhuo" <gongzhuo@163.net>
To: "Linux PPC Mailing List" <linuxppc-embedded@lists.linuxppc.org>
Subject: How to use ppcbug to debug my program with mmu?
Date: Fri, 21 Jul 2000 16:45:07 +0800 [thread overview]
Message-ID: <004e01bff2ef$fb03d0a0$4607a8c0@LocalHost> (raw)
Hi:
I am using MVME2600 SBC and I want to debug my program under PPCbug.
According the PPCbug Firmware Package User's Manual chapter 2, a program
with mmu enable should be debugged using PPCbug if some rules are obeyed.
Those address ranges
0x0 -- 0x0fffffff,
0x10000000 -- 0x1fffffff ,
0xe0000000 -- 0xefffffff,
0xf0000000 -- 0xffffffff
have been mapped from physical address to logical address 1 to 1 using
BAT mothed . Exception vectors 0x100 , 0x700, 0xc00, 0x2000 and spr272,
spr273, spr274, spr275 are not being used.
I write the code like this under ppcbug at address 0x40000:
1. initial all the BAT register
2. isync
3. msr | 0x30 ==> msr # open the mmu
4. do sth. else
But it always not come back to PPC1-bug> status after I use command
'T'to singlestep run step 3.
I also used the mothed like this :
1. initial all the BAT register
2. isync
3. msr | 0x30 ==> srr1 # open the mmu
4. logical address of 6. => srr0
5. rfi
6. do sth. else
The same error happened when singlestep 5.
Can this code be debugged under ppcbug? If can , how?
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next reply other threads:[~2000-07-21 8:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-07-21 8:45 Gong Zhuo [this message]
2000-07-21 9:17 ` How to use ppcbug to debug my program with mmu? Gabriel Paubert
2000-07-24 11:43 ` Gong Zhuo
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