From: Milton Miller <miltonm@bga•com>
To: Olof Johansson <olof@lixom•net>
Cc: ppcdev <linuxppc-dev@ozlabs•org>,
David Gibson <david@gibson•dropbear.id.au>
Subject: Re: [PATCH 5/6] Support for the Ebony 440GP reference board in arch/powerpc
Date: Sat, 5 May 2007 13:43:01 -0500 [thread overview]
Message-ID: <00bf8e702554e7903d92f618ee236528@bga.com> (raw)
In-Reply-To: <20070504143645.GA10645@lixom.net>
Olof wrote:
> > +static void ebony_exit(void)
> > +{
> > + unsigned long tmp;
> > +
> > + asm volatile (
> > + "mfspr %0,%1\n"
> > + "oris %0,%0,%2@h\n"
> > + "mtspr %1,%0"
> > + : "=&r"(tmp) : "i"(SPRN_DBCR0), "i"(DBCR0_RST_SYSTEM)
>
> You don't have to pass in the constants here, you can specify them in
> the asm. Makes it a little more readable.
How? CPP doesn't apply inside the strings.
Did you mean because these defines were immediately above:
> > +> +#define SPRN_DBCR0 0x134
> > +#define DBCR0_RST_SYSTEM 0x30000000
could just be comments in the asm?
That works until someone moves them to an include file.
milton
next prev parent reply other threads:[~2007-05-05 18:43 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-04 5:54 [0/6] Ebony support David Gibson
2007-05-04 5:57 ` [PATCH 3/6] Add device tree for Ebony David Gibson
2007-05-04 5:57 ` [PATCH 6/6] Early serial debug support for PPC44x David Gibson
2007-05-04 5:57 ` [PATCH 5/6] Support for the Ebony 440GP reference board in arch/powerpc David Gibson
2007-05-04 14:36 ` Olof Johansson
2007-05-05 18:43 ` Milton Miller [this message]
2007-05-05 19:02 ` Olof Johansson
2007-05-05 20:37 ` Segher Boessenkool
2007-05-06 0:43 ` David Gibson
2007-05-06 1:58 ` Segher Boessenkool
2007-05-07 3:22 ` David Gibson
2007-05-07 3:45 ` Olof Johansson
2007-05-07 4:02 ` David Gibson
2007-05-07 10:41 ` Josh Boyer
2007-05-04 5:57 ` [PATCH 1/6] Only legacy ports should allow addr/irq changes via setserial David Gibson
2007-05-04 5:57 ` [PATCH 2/6] Use resource_size_t for serial port IO addresses David Gibson
2007-05-07 0:30 ` [PATCH 4/6] Device tree aware EMAC driver David Gibson
2007-05-07 0:57 ` Olof Johansson
2007-05-07 1:40 ` David Gibson
2007-05-07 3:56 ` Olof Johansson
2007-05-07 4:10 ` David Gibson
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