From: "Kip Walker" <kwalker@broadcom.com>
To: "Kevin D. Kissell" <kevink@mips.com>
Cc: linux-mips@linux-mips.org, "Ralf Baechle" <ralf@linux-mips.org>
Subject: Re: [PATCH] kernelsp on 64-bit kernel
Date: Tue, 04 Mar 2003 15:16:45 -0800 [thread overview]
Message-ID: <3E6533DD.B72D6F10@broadcom.com> (raw)
In-Reply-To: 01e401c2e2a2$f1866010$10eca8c0@grendel
> For whatever it's worth, I've always maintained that stealing the Watchpoint
> registers in this way was a pretty questionable hack to be avoided. Watchpoint
> registers are *optional* in MIPS64 and may not even exist. And yes, someone
> might want to use them for their intended purpose some day. However, please
> note that the EJTAG breakpoint registers are completely orthogonal to the
> watchpoint registers.
That is true, but in SB1, watchpoint registers can be used by the JTAG
debugger, and I do it all the time. It doesn't have the EJTAG
breakpoint registers, but rather overloads (I know, I know) use of the
watchpoint registers and has a mode bit for causing a debug exception
instead of a general exception when they are tripped.
Kip
next prev parent reply other threads:[~2003-03-04 23:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-04 21:50 [PATCH] kernelsp on 64-bit kernel Kip Walker
2003-03-04 23:08 ` Kevin D. Kissell
2003-03-04 23:08 ` Kevin D. Kissell
2003-03-04 23:16 ` Kip Walker [this message]
2003-03-04 23:14 ` Jun Sun
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