From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Albert Herranz <albert_herranz@yahoo.es>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC PATCH v2 08/11] powerpc: gamecube/wii: early debugging using usbgecko
Date: Mon, 30 Nov 2009 10:18:15 +1100 [thread overview]
Message-ID: <1259536695.2076.40.camel@pasglop> (raw)
In-Reply-To: <1259441037-15725-9-git-send-email-albert_herranz@yahoo.es>
On Sat, 2009-11-28 at 21:43 +0100, Albert Herranz wrote:
> + * Prepare again the same BAT for MMU_init.
> + * This allows udbg I/O to continue working after the MMU is
> + * turned on for real.
> + *
> + * We are assuming here that exi_io_base is identity mapped.
> + */
> + addr = ((unsigned long)exi_io_base) & 0xffff0000;
> + setbat(1, addr, addr, 128*1024, PAGE_KERNEL_NCG);
How do you prevent that from overlapping otherwise valid kernel
mappings ?
You need to allocate the virtual space. For a debug thing like that, you
could use the fixmap. In fact, I think we should create a fixmap entry
or two always available for use by early debug.
Cheers,
Ben.
next prev parent reply other threads:[~2009-11-29 23:18 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-28 20:43 [RFC PATCH v2 00/11] powerpc: nintendo gamecube support Albert Herranz
2009-11-28 20:43 ` [RFC PATCH v2 01/11] powerpc: gamecube/wii: usbgecko bootwrapper console support Albert Herranz
2009-12-01 18:28 ` Segher Boessenkool
2009-11-28 20:43 ` [RFC PATCH v2 02/11] powerpc: gamecube: device tree Albert Herranz
2009-12-01 18:29 ` Segher Boessenkool
2009-11-28 20:43 ` [RFC PATCH v2 03/11] powerpc: gamecube: bootwrapper bits Albert Herranz
2009-12-01 18:31 ` Segher Boessenkool
2009-11-28 20:43 ` [RFC PATCH v2 04/11] powerpc: gamecube/wii: introduce GAMECUBE_COMMON Albert Herranz
2009-11-28 20:43 ` [RFC PATCH v2 05/11] powerpc: gamecube/wii: declare as non-coherent platforms Albert Herranz
2009-11-28 20:43 ` [RFC PATCH v2 06/11] powerpc: gamecube/wii: do not include PCI support Albert Herranz
2009-11-28 20:43 ` [RFC PATCH v2 07/11] powerpc: gamecube/wii: udbg support for usbgecko Albert Herranz
2009-12-01 18:33 ` Segher Boessenkool
2009-11-28 20:43 ` [RFC PATCH v2 08/11] powerpc: gamecube/wii: early debugging using usbgecko Albert Herranz
2009-11-29 23:18 ` Benjamin Herrenschmidt [this message]
2009-11-30 5:50 ` Albert Herranz
2009-11-30 6:14 ` Benjamin Herrenschmidt
2009-11-30 6:28 ` Albert Herranz
2009-11-30 6:42 ` Benjamin Herrenschmidt
2009-11-30 6:15 ` Albert Herranz
2009-11-28 20:43 ` [RFC PATCH v2 09/11] powerpc: gamecube/wii: flipper interrupt controller support Albert Herranz
2009-11-29 23:21 ` Benjamin Herrenschmidt
2009-12-01 18:35 ` Segher Boessenkool
2009-12-01 19:48 ` Albert Herranz
2009-12-02 20:56 ` Benjamin Herrenschmidt
2009-12-02 23:29 ` Albert Herranz
2009-11-28 20:43 ` [RFC PATCH v2 10/11] powerpc: gamecube: platform support Albert Herranz
2009-11-28 20:43 ` [RFC PATCH v2 11/11] powerpc: gamecube: default config Albert Herranz
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