lkml.org 
[lkml]   [2011]   [Nov]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: powerpc 476, Little-endian, pte fault
From
> The relevant options are -mcpu=476 (no FP unit) and -mcpu=476fp> (with FP unit).  Basically, -mcpu=476 is equivalent to> -mcpu=476fp -msoft-float.
Yes what you have mentioned is right.

I had a problem configuring the GCC for 476 in little endian mode,
therefore I am using 440 compiler. As this compiler doesn't accept
-mcpu=476 i am using -mcpu=440.

So is this PTE fault related to the compiler options?

Thanks,
Santosh Kumar .A

On 1 November 2011 19:14, Peter Bergner <bergner@vnet.ibm.com> wrote:
> On Tue, 2011-11-01 at 08:32 +0530, Santosh Kumar wrote:
>> I am using the same compiler as 476 & 440 instruction is almost the same.
>
> Well the 476 implements ISA 2.05, which I think has added a fair amount
> over the 440.  Not to mention the 476 core that has been released has
> a FP unit.  I'll note that GCC has support for a 476 with and without
> a FP unit, even though AFAIK, we only ship one with a FP unit.
> The relevant options are -mcpu=476 (no FP unit) and -mcpu=476fp
> (with FP unit).  Basically, -mcpu=476 is equivalent to
> -mcpu=476fp -msoft-float.
>
>
>
>> @@ -53,7 +58,12 @@
>>         mullw   r10,r0,r4       # and get the remainder
>>         add     r8,r8,r0
>>         subf    r6,r10,r6
>> +#ifdef CONFIG_INVADER
>>  4:     stw     r7,0(r3)        # return the quotient in *r3
>>         stw     r8,4(r3)
>> +#else
>> +4:     stw     r7,0(r3)        # return the quotient in *r3
>> +       stw     r8,4(r3)
>> +#endif
>>         mr      r3,r6           # return the remainder in r3
>>         blr
>
> This looks like a typo, since you didn't actually swap the offsets
> on the stw's like you did in all of the other patch hunks.
>
>
> Peter
>
>
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2011-11-01 18:17    [W:0.043 / U:6.808 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site