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[microblaze-uclinux] [Fwd: Re: ml401 reference design problems]

Oops...forgot to post this to the list...
John
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Hi John,
I changed the target dir in mss os section to point to uclinux-auto
I am also getting the following error after running make:

mb-gcc  -Os -g -fomit-frame-pointer -fno-common -Wall   -mno-xl-soft-mul 
-mxl-barrel-shift -mno-xl-soft-div -Dlinux -D__linux__ -Dunix 
-D__uClinux__ -DEMBED -nostdinc 
-I/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/include 
-I/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/include/include 
-fno-builtin -Wl,-elf2flt -nostartfiles 
/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/lib/crt0.o 
-L/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/lib -o sh 
sh1.o sh2.o sh3.o sh4.o sh5.o sh6.o -lc 
/proj/burren90_cork/jmcgrath/EDK/EDK_Gmm.12.3.1/gnu/microblaze/lin/bin/../lib/gcc-lib/microblaze/2.95.3-4/./libgcc.a 
/proj/burren90_cork/jmcgrath/EDK/EDK_Gmm.12.3.1/gnu/microblaze/lin/bin/../lib/gcc-lib/microblaze/2.95.3-4/./../../../../microblaze/lib/libc.a
mb-ld: warning: cannot find entry symbol lf2flt; defaulting to 00000000
sh1.o: In function `initarea':
/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/user/sh/sh1.c:826: 
undefined reference to `__data_start'
sh1.o: In function `dupstate':
/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/user/sh/sh1.c:841: 
undefined reference to `__data_start'
make[2]: *** [sh] Error 1
make[2]: Leaving directory 
`/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/user/sh'
make[1]: *** [all] Error 2
make[1]: Leaving directory 
`/home/jmcgrath/projects/uClinux/CVS_dl/Try2/uClinux-dist/user'
make: *** [subdirs] Error 1

I did a search of all microblaze files which have some reference to 
__data_start, and I found:

linux-2.4.x/arch/microblaze/mbvanilla.ld:               __data_start = . ;
linux-2.4.x/arch/microblaze/suzaku.ld:          __data_start = . ;
linux-2.4.x/arch/microblaze/platform/suzaku/ram.ld.in:          
__data_start = . ;
linux-2.4.x/arch/microblaze/platform/uclinux-auto/ram.ld.in:            
__data_start = . ;

Is there something that I need to configure here which is not being set 
by uclinux-auto?


Cheers
John


John McGrath wrote:

> Hi John,
> Even though I dont work in the EDK department of Xilinx, I have a 
> great personal interest in all things embedded, so this is more of a 
> "hobby" than anything serious..plus we have a lot of neat hardware 
> sitting around :)
>
> I've been playing around with the reference design (uclinux-auto) for 
> ml401 from your website. I dont have this board, but Im trying to 
> build the bitstream / image from scratch, and then use this experience 
> to port to my board (v2p7 AFX FF456).
> Ive done the usual - cvs update / patch / setup project in EDK.
>
> I noticed something quite strange:
> In your downaoad, in the mss os section, you have the path you wanted 
> libgen to dump the auto-config.in file. I modified the root of this, 
> but left the rest of the dir structure the same. (i.e. the ml401 
> directory is the last thing on that line).
> When I run make menuconfig I get only two options under Xilinx commons 
> and uclinux-auto.
>
> My question is this: how does it know to use the directory: 
> .....linux-2.4.x/arch/microblaze/platform/ml401/ ? as there is also a 
> directory called uclinux-auto here. I would assume it would naturally 
> pickup this directory over the ml401 directory?
> So does this mean I have to customise the  
> vendors/Xilinx/uclinux-auto/ directory also to add my own ml401 here? 
> or can I simply copy the entire contents of  
> vendors/Xilinx/uclinux-auto/ to  vendors/Xilinx/ml401 ?
> There appears to be a lot of configuration files in here 
> vendors/Xilinx/* also....do these have to be configured too?
>
> When make menuconfig finishes, it also askes a number of questions - 
> do I simply answer no to all of these? or is there a particular subset 
> of these questions i need to say yes to to build the ml401 platform :P
>
> I guess a REAL dummies guide would be great - as it's quite a daunting 
> task to get right, when I only spend the odd hour here and there on 
> it. Though I have to commend you on the uclinux-auto flow - it's 
> really taken a lot of the pain out of the configuration!
>
> Any help would be appreciated!
>
> Cheers
> John
>
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