From: Liam Davies <ldavies@agile.tv>
To: Ralf Baechle <ralf@oss.sgi.com>
Cc: linux-mips@oss.sgi.com
Subject: Re: Troubles with TLB refills
Date: Tue, 06 Mar 2001 16:45:32 +1000 [thread overview]
Message-ID: <3AA4878C.F10825DE@agile.tv> (raw)
In-Reply-To: 20010305114926.A26862@bacchus.dhis.org
Ralf,
>From the change 1.42 to 1.43 on file arch/mips/kernel/traps.c some code was
added
to copy the EJTAG exception vector
+ /*
+ * Copy the EJTAG debug exception vector handler code to it's final
+ * destination.
+ */
+ memcpy((void *)(KSEG0 + 0x300), &except_vec_ejtag_debug, 0x80);
This code indescriminatly smashes the end of except_vec0_r4600 and
all of except_vec0_nevada handlers with the .fill set to only 0x280
00000000800002d4 T except_vec0_r4600
0000000080000328 T except_vec0_nevada
0000000080000380 T except_vec0_r45k_bvahwbug
I'm not sure under what platform we need to load JTAG support, but we can
just increase the fill area in head.S to say 0x400
Cheers
Liam
=-------------=
Agile TV Corporation
WARNING: multiple messages have this Message-ID (diff)
From: Liam Davies <ldavies@agile.tv>
To: Ralf Baechle <ralf@oss.sgi.com>
Cc: linux-mips@oss.sgi.com
Subject: Re: Troubles with TLB refills
Date: Tue, 06 Mar 2001 16:45:32 +1000 [thread overview]
Message-ID: <3AA4878C.F10825DE@agile.tv> (raw)
Message-ID: <20010306064532.PqXwlKSdQcRlpLdb54R2Tw_OnKDlggdHreOJEKMlXwA@z> (raw)
In-Reply-To: 20010305114926.A26862@bacchus.dhis.org
Ralf,
From the change 1.42 to 1.43 on file arch/mips/kernel/traps.c some code was
added
to copy the EJTAG exception vector
+ /*
+ * Copy the EJTAG debug exception vector handler code to it's final
+ * destination.
+ */
+ memcpy((void *)(KSEG0 + 0x300), &except_vec_ejtag_debug, 0x80);
This code indescriminatly smashes the end of except_vec0_r4600 and
all of except_vec0_nevada handlers with the .fill set to only 0x280
00000000800002d4 T except_vec0_r4600
0000000080000328 T except_vec0_nevada
0000000080000380 T except_vec0_r45k_bvahwbug
I'm not sure under what platform we need to load JTAG support, but we can
just increase the fill area in head.S to say 0x400
Cheers
Liam
=-------------=
Agile TV Corporation
next prev parent reply other threads:[~2001-03-06 6:45 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-05 3:40 Troubles with TLB refills Liam Davies
2001-03-05 10:49 ` Ralf Baechle
2001-03-06 3:10 ` Liam Davies
2001-03-06 12:58 ` Ralf Baechle
2001-03-07 3:36 ` Problem makeing an O2 run bootp nick
2001-03-07 3:36 ` nick
2001-03-07 19:11 ` Rafal Boni
2001-03-07 19:14 ` nick
2001-03-08 7:57 ` Chris Ruvolo
2001-03-10 18:25 ` Ralf Baechle
2001-03-12 1:09 ` IP32 (O2) diff nick
2001-03-06 6:45 ` Liam Davies [this message]
2001-03-06 6:45 ` Troubles with TLB refills Liam Davies
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