[okl4-developer] S3C2440A and okl4

[Geoffrey Lee]

On Mon, Aug 18, 2008 at 02:33:49PM +0000, Rémy Gottschalk wrote:
>
> The faulty instruction seems to be  a clzeq within arm_comon_return :

Hi Remy

I don't think the clz instruction is supported on the arm920t, 
which might be the cause of the problem.


>
> f002c100 <arm_common_return>:
> f002c100:       e3a0020f        mov     r0, #-268435456 ; 0xf0000000
> f002c104:       e5900000        ldr     r0, [r0]
> f002c108:       e3a0c20f        mov     ip, #-268435456 ; 0xf0000000
> f002c10c:       e59cc014        ldr     ip, [ip, #20]
> f002c110:       ee03cf10        mcr     15, 0, ip, cr3, cr0, {0}
> f002c114:       e3a0020f        mov     r0, #-268435456 ; 0xf0000000
> f002c118:       e5900000        ldr     r0, [r0]
> f002c11c:       e20d1ffe        and     r1, sp, #1016   ; 0x3f8
> f002c120:       e3510ffe        cmp     r1, #1016       ; 0x3f8
> f002c124:       0280d058        addeq   sp, r0, #88     ; 0x58
> f002c128:       059010b8        ldreq   r1, [r0, #184]
>
> f002c12c:       016f1f11        clzeq   r1, r1
>
> f002c130:       03510000        cmpeq   r1, #0  ; 0x0
> f002c134:       e59de044        ldr     lr, [sp, #68]
> f002c138:       e9dd7fff        ldmib   sp, {r0, r1, r2, r3, r4, r5, r6,  
> r7, r8, r9, sl, fp, ip, sp, lr}^
> f002c13c:       e1a00000        nop                     (mov r0,r0)
> f002c140:       e16ff00e        msr     SPSR_fsxc, lr
> f002c144:       e59de040        ldr     lr, [sp, #64]
> f002c148:       e28dd048        add     sp, sp, #72     ; 0x48
> f002c14c:       125ef001        subnes  pc, lr, #1      ; 0x1
> f002c150:       e59f0d48        ldr     r0, [pc, #3400] ; f002cea0  
> <scheduler_ptr+0xc>
> f002c154:       e1a0f000        mov     pc, r0
>
>
>> Also, when you download the image.boot image to your machine, where 
>> does the
>> bootloader put it in memory?
>>
>
> The image is downloaded at 0x33000000. (My ram goes from 0x30000000 to  
> 0x34000000).


OK, this looks fine.

	-gl

>
>
> Regards,
>
> -- 
> Remy Gottschalk - rgottschalk at linagora.com
> Ingénieur informatique embarquée
> Groupe LINAGORA - http://www.linagora.com
> Tél.: +33(0)1 58 18 68 28 - Fax : +33(0)1 58 18 68 29
>

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