fsl_rio.c build problem

fsl_rio.c build problem

[kerstin jonsson]

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Hi,

I'm using:

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

and building for ARCH=powerpc - mpc85xx_defconfig

arch/powerpc/sysdev/fsl_rio.c will not build due to a missing
MCSR_MASK bitmask definition.

The attached patch is based on code found in

git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git

and - at the least - will fix the build problem.

BR,
Kerstin


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>From 42d0a01865beda04b70549245ce1854c8f0074d3 Mon Sep 17 00:00:00 2001
From: Kerstin Jonsson <kerstin.jonsson@ericsson.com>
Date: Fri, 4 Jun 2010 12:56:02 +0200
Subject: [PATCH] fix fsl_rio.c build problem in powerpc mpc85xx_defconfig

---
 arch/powerpc/include/asm/reg_booke.h |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h
index 2360317..68c3833 100644
--- a/arch/powerpc/include/asm/reg_booke.h
+++ b/arch/powerpc/include/asm/reg_booke.h
@@ -231,6 +231,12 @@
 #define MCSR_LDG	0x00002000UL /* Guarded Load */
 #define MCSR_TLBSYNC	0x00000002UL /* Multiple tlbsyncs detected */
 #define MCSR_BSL2_ERR	0x00000001UL /* Backside L2 cache error */
+
+/* e500 parts may set unused bits in MCSR; mask these off */
+#define MCSR_MASK	(MCSR_MCP | MCSR_ICPERR | MCSR_DCP_PERR | \
+			MCSR_DCPERR | MCSR_BUS_IAERR | MCSR_BUS_RAERR | \
+			MCSR_BUS_WAERR | MCSR_BUS_IBERR | MCSR_BUS_RBERR | \
+			MCSR_BUS_WBERR | MCSR_BUS_IPERR | MCSR_BUS_RPERR)
 #endif
 
 #ifdef CONFIG_E200
@@ -243,6 +249,11 @@
 #define MCSR_BUS_DRERR 	0x00000008UL /* Read Bus Error on data load */
 #define MCSR_BUS_WRERR 	0x00000004UL /* Write Bus Error on buffered
 					store or cache line push */
+
+/* e200 parts may set unused bits in MCSR; mask these off */
+#define MCSR_MASK	(MCSR_MCP | MCSR_CP_PERR | MCSR_CPERR | \
+			MCSR_EXCP_ERR | MCSR_BUS_IRERR | MCSR_BUS_DRERR | \
+			MCSR_BUS_WRERR)
 #endif
 
 /* Bit definitions for the DBSR. */
-- 
1.7.1

Re: fsl_rio.c build problem

[Scott Wood]

On 06/04/2010 06:24 AM, kerstin jonsson wrote:
> Hi,
>
> I'm using:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
>
> and building for ARCH=powerpc - mpc85xx_defconfig
>
> arch/powerpc/sysdev/fsl_rio.c will not build due to a missing
> MCSR_MASK bitmask definition.
>
> The attached patch is based on code found in
>
> git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git
>
> and - at the least - will fix the build problem.

Can we remove the use of MCSR_MASK from fsl_rio.c instead?  I don't see 
what it's accomplishing here.  MCSR_MASK will be wrong on e500mc, so 
exporting it as something that looks generic doesn't seem right.

MCSR_BUS_RBERR also needs to change on e500mc -- you'll probably get 
MCSR_LDG.

-Scott

Re: fsl_rio.c build problem

[kerstin jonsson]

On 06/04/2010 10:04 PM, Scott Wood wrote:
> On 06/04/2010 06:24 AM, kerstin jonsson wrote:
>    
>> Hi,
>>
>> I'm using:
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
>>
>> and building for ARCH=powerpc - mpc85xx_defconfig
>>
>> arch/powerpc/sysdev/fsl_rio.c will not build due to a missing
>> MCSR_MASK bitmask definition.
>>
>> The attached patch is based on code found in
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git
>>
>> and - at the least - will fix the build problem.
>>      
> Can we remove the use of MCSR_MASK from fsl_rio.c instead?  I don't see
> what it's accomplishing here.  MCSR_MASK will be wrong on e500mc, so
> exporting it as something that looks generic doesn't seem right.
>    
Thanks for pointing that out, I agree in the context it's currently
used in the fsl_rio.c, it's not obvious what purpose it serves.

I have a e500v2 so I guess that just removing the MCSR_MASK
from the fsl_rio.c will make no difference in my case.
> MCSR_BUS_RBERR also needs to change on e500mc -- you'll probably get
> MCSR_LDG.
>
>    
Someone that know the e500mc probably need to have a look
at this part of the fsl_rio.c then.

BR,
Kerstin
> -Scott
>