[RFC:PATCH 02/03] powerpc: Add definitions for Debug Registers on BookE Platforms

[Dave Kleikamp]

On Thu, 2009-12-10 at 12:07 -0500, Josh Boyer wrote:
> On Thu, Dec 10, 2009 at 01:57:21PM -0200, Dave Kleikamp wrote:

> >+	/*
> >+	 * The stored value of the DBSR register will be the value at the
> >+	 * last debug interrupt. This register can only be read from the
> >+	 * user (will never be written to) and has value while helping to
> >+	 * describe the reason for the last debug trap.  Torez
> >+	 */
> >+	unsigned long	dbsr;
> >+	/*
> >+	 * The following will contain addresses used by debug applications
> >+	 * to help trace and trap on particular address locations.
> >+	 * The bits in the Debug Control Registers above help define which
> >+	 * of the following registers will contain valid data and/or addresses.
> >+	 */
> >+	unsigned long	iac1;
> >+	unsigned long	iac2;
> >+	unsigned long	iac3;
> >+	unsigned long	iac4;
> >+	unsigned long	dac1;
> >+	unsigned long	dac2;
> >+	unsigned long	dvc1;
> >+	unsigned long	dvc2;
> > #endif
> 
> Without digging much, I'm wondering if we could just use a pointer to a debug
> register structure here instead of growing struct thread more.

I didn't do this (yet).  I'm not sure if it is worth the trouble.  Don't
hesitate to change my mind on this.

Shaggy
-- 
David Kleikamp
IBM Linux Technology Center