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Re: Re: SGI O2+ RM7000 set_uncached_handler error during kernel built

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: Re: SGI O2+ RM7000 set_uncached_handler error during kernel built
From: Tom Weustink <freshy98@gmx.net>
Date: Tue, 30 May 2006 17:08:47 +0200
Cc: linux-mips@linux-mips.org
In-reply-to: <20060530145841.GA28223@linux-mips.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <4477B8C9.3050909@gmx.net> <20060530145841.GA28223@linux-mips.org>
Sender: linux-mips-bounce@linux-mips.org
> 
> > I finally got a round building a toolchain for creating kernels for my 
> > SGI O2+ RM7000 machine.
> > 
> > I did a ip32_defconfig and used menuconfig to edit some small options.
> > One was to set it too RM7000 obviously.
> > 
> > When I build it, I get the following error:
> > 
> >  CC      arch/mips/kernel/traps.o
> > arch/mips/kernel/traps.c: In function `set_uncached_handler':
> > arch/mips/kernel/traps.c:1360: error: `TO_PHYS_MASK' undeclared (first 
> > use in this function)
> > 
> > When I build it for R5000 (only that changed in menuconfig) the compile 
> > runs without a problem.
> > 
> > Checking arch/mips/kernel/traps.c:1360 shows that installs the uncached 
> > CPU exception handler to UNCAC.
> > Now I know the RM7000 is kinda weird, but shouldn't it just work on it 
> > since it does work on R5000 since it's MIPS64?
> > 
> > I also heard from `Kumba that the kernel won't boot at all due to a bug 
> > in IP32 so that it hangs extremely early, but having it to just built 
> > would be nice for me atm.
> 
> The build error part was trivial, fix below.
> 
>   Ralf
> 
Great! I will try it out tonight.
I kind of had the idea something pointing to RM7000 was missing, obviously I 
had no idea where though.

Tom


> commit 948a25c865f2c486f3f2a6034c359c2104c777df
> Author: Ralf Baechle <ralf@linux-mips.org>
> Date:   Tue May 30 15:55:05 2006 +0100
> 
>     [MIPS] Fix 64-bit build for RM7000.
>     
>     RM7000 has 40-bit virtual / 36-bit physical address space.
>     
>     Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
> 
> diff --git a/include/asm-mips/addrspace.h b/include/asm-mips/addrspace.h
> index 42520cc..1386af1 100644
> --- a/include/asm-mips/addrspace.h
> +++ b/include/asm-mips/addrspace.h
> @@ -129,6 +129,7 @@ #define PHYS_TO_XKPHYS(cm,a)              (_LLCONST_
>  #if defined (CONFIG_CPU_R4300)                                               
> \
>      || defined (CONFIG_CPU_R4X00)                                    \
>      || defined (CONFIG_CPU_R5000)                                    \
> +    || defined (CONFIG_CPU_RM7000)                                   \
>      || defined (CONFIG_CPU_NEVADA)                                   \
>      || defined (CONFIG_CPU_TX49XX)                                   \
>      || defined (CONFIG_CPU_MIPS64)

-- 


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