[Qemu-devel] u-boot on 'qemu-system-mips64 -M mips'

[Qemu-devel] u-boot on 'qemu-system-mips64 -M mips'

[KAWAKATSU Noritaka]

Hi,

I have built u-boot binary for 'qemu-system-mips -M mips'.
It is fine to run ths u-boot binary.
But the same u-boot binary does not run on 'qemu-system-mips64 -M mips'.

I do not understand what happends on the qemu-mips64 execution.
Is this a bug for qemu-system-mips64 ?
Or should I build u-boot binary by another configuration?

------
* u-boot building steps
(1) build the gcc 4.5 cross-compiler for mips from the source.
(2) build u-boot(2010.03) by the (1)compiler.
(3) copy the u-boot.bin to /usr/share/qemu/mips_bios.bin
* qemu(mips) execution command
$ qemu-system-mips -L /usr/share/qemu -d in_asm -nographic
* get /tmp/qemu.log
the execution seems fine.

* qemu(mips64) execution command
$ qemu-system-mips64 -L /usr/share/qemu -d in_asm -nographic
* get /tmp/qemu.log
the execution seems not fine. Something is wrong?



----- /tmp/qemu.log (last 10-20 lines) [qemu-system-mips64]
IN:
0xffffffffbfc0ee8c:  xori	v0,v0,0x3d
0xffffffffbfc0ee90:  li	v1,-1
0xffffffffbfc0ee94:  movn	s1,v1,v0
0xffffffffbfc0ee98:  lw	ra,52(sp)
0xffffffffbfc0ee9c:  move	v0,s1
0xffffffffbfc0eea0:  lw	s3,48(sp)
0xffffffffbfc0eea4:  lw	s2,44(sp)
0xffffffffbfc0eea8:  lw	s1,40(sp)
0xffffffffbfc0eeac:  lw	s0,36(sp)
0xffffffffbfc0eeb0:  jr	ra
0xffffffffbfc0eeb4:  addiu	sp,sp,56

helper_raise_exception_err: 20 0
do_interrupt enter: PC ffffffffbfc0ee94 EPC 0000000000000000 reserved instruction exception
do_interrupt: PC ffffffffbfc00380 EPC ffffffffbfc0ee94 cause 10
    S 00400002 C 00808428 A 0000000000000000 D 0000000000000000
IN:
0xffffffffbfc00380:  b	0xffffffffbfc00584
0xffffffffbfc00384:  li	k0,896

IN:
0xffffffffbfc00584:  b	0xffffffffbfc00584
0xffffffffbfc00588:  nop
-----

----- /tmp/qemu.log (last 10-20 lines) [qemu-system-mips](coresponding part)
IN:
0xbfc0ee8c:  xori	v0,v0,0x3d
0xbfc0ee90:  li	v1,-1
0xbfc0ee94:  movn	s1,v1,v0
0xbfc0ee98:  lw	ra,52(sp)
0xbfc0ee9c:  move	v0,s1
0xbfc0eea0:  lw	s3,48(sp)
0xbfc0eea4:  lw	s2,44(sp)
0xbfc0eea8:  lw	s1,40(sp)
0xbfc0eeac:  lw	s0,36(sp)
0xbfc0eeb0:  jr	ra
0xbfc0eeb4:  addiu	sp,sp,56
-----

--
Noritaka KAWAKATSU

[Qemu-devel] (buiding info)u-boot on 'qemu-system-mips64 -M mips'

[KAWAKATSU Noritaka]

Hi,

I should have written the infomation for u-boot's board configuration.

> (2) build u-boot(2010.03) by the (1)compiler.

I rewrite configuration file for 'qemu-mips':
  u-boot-2010.03/board/qemu-mips/u-bool.lds
--[original]
/*
OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-bigmips")
*/
OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", "elf32-tradbigmips")
--[new]
OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-bigmips")
/*
OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", "elf32-tradbigmips")
*/
---
And I use 'qemu-mips' board configuration for building u-boot.
$ cd u-boot-2010.03
$ make qemu_mips_config
$ make all
( I get 'u-boot.bin' )

Regards,
Noritaka KAWAKATSU.

(2010/06/22 8:26), KAWAKATSU Noritaka wrote:
> Hi,
> 
> I have built u-boot binary for 'qemu-system-mips -M mips'.
> It is fine to run ths u-boot binary.
> But the same u-boot binary does not run on 'qemu-system-mips64 -M mips'.
> 
> I do not understand what happends on the qemu-mips64 execution.
> Is this a bug for qemu-system-mips64 ?
> Or should I build u-boot binary by another configuration?
> 
> ------
> * u-boot building steps
> (1) build the gcc 4.5 cross-compiler for mips from the source.
> (2) build u-boot(2010.03) by the (1)compiler.
> (3) copy the u-boot.bin to /usr/share/qemu/mips_bios.bin
> * qemu(mips) execution command
> $ qemu-system-mips -L /usr/share/qemu -d in_asm -nographic
> * get /tmp/qemu.log
> the execution seems fine.
> 
> * qemu(mips64) execution command
> $ qemu-system-mips64 -L /usr/share/qemu -d in_asm -nographic
> * get /tmp/qemu.log
> the execution seems not fine. Something is wrong?
> 
> 
> 
> ----- /tmp/qemu.log (last 10-20 lines) [qemu-system-mips64]
> IN:
> 0xffffffffbfc0ee8c:  xori	v0,v0,0x3d
> 0xffffffffbfc0ee90:  li	v1,-1
> 0xffffffffbfc0ee94:  movn	s1,v1,v0
> 0xffffffffbfc0ee98:  lw	ra,52(sp)
> 0xffffffffbfc0ee9c:  move	v0,s1
> 0xffffffffbfc0eea0:  lw	s3,48(sp)
> 0xffffffffbfc0eea4:  lw	s2,44(sp)
> 0xffffffffbfc0eea8:  lw	s1,40(sp)
> 0xffffffffbfc0eeac:  lw	s0,36(sp)
> 0xffffffffbfc0eeb0:  jr	ra
> 0xffffffffbfc0eeb4:  addiu	sp,sp,56
> 
> helper_raise_exception_err: 20 0
> do_interrupt enter: PC ffffffffbfc0ee94 EPC 0000000000000000 reserved instruction exception
> do_interrupt: PC ffffffffbfc00380 EPC ffffffffbfc0ee94 cause 10
>      S 00400002 C 00808428 A 0000000000000000 D 0000000000000000
> IN:
> 0xffffffffbfc00380:  b	0xffffffffbfc00584
> 0xffffffffbfc00384:  li	k0,896
> 
> IN:
> 0xffffffffbfc00584:  b	0xffffffffbfc00584
> 0xffffffffbfc00588:  nop
> -----
> 
> ----- /tmp/qemu.log (last 10-20 lines) [qemu-system-mips](coresponding part)
> IN:
> 0xbfc0ee8c:  xori	v0,v0,0x3d
> 0xbfc0ee90:  li	v1,-1
> 0xbfc0ee94:  movn	s1,v1,v0
> 0xbfc0ee98:  lw	ra,52(sp)
> 0xbfc0ee9c:  move	v0,s1
> 0xbfc0eea0:  lw	s3,48(sp)
> 0xbfc0eea4:  lw	s2,44(sp)
> 0xbfc0eea8:  lw	s1,40(sp)
> 0xbfc0eeac:  lw	s0,36(sp)
> 0xbfc0eeb0:  jr	ra
> 0xbfc0eeb4:  addiu	sp,sp,56
> -----
> 
> --
> Noritaka KAWAKATSU
> 
> 
> 

Re: [Qemu-devel] u-boot on 'qemu-system-mips64 -M mips'

[Arnaud Patard]

KAWAKATSU Noritaka <kawakatsu.noritaka@interdesigntech.co.jp> writes:

> Hi,


Hi,
>
> I have built u-boot binary for 'qemu-system-mips -M mips'.
> It is fine to run ths u-boot binary.
> But the same u-boot binary does not run on 'qemu-system-mips64 -M mips'.
>
> I do not understand what happends on the qemu-mips64 execution.
> Is this a bug for qemu-system-mips64 ?
> Or should I build u-boot binary by another configuration?
>
> ------
> * u-boot building steps
> (1) build the gcc 4.5 cross-compiler for mips from the source.
> (2) build u-boot(2010.03) by the (1)compiler.
> (3) copy the u-boot.bin to /usr/share/qemu/mips_bios.bin
> * qemu(mips) execution command
> $ qemu-system-mips -L /usr/share/qemu -d in_asm -nographic
> * get /tmp/qemu.log
> the execution seems fine.
>
> * qemu(mips64) execution command
> $ qemu-system-mips64 -L /usr/share/qemu -d in_asm -nographic
> * get /tmp/qemu.log
> the execution seems not fine. Something is wrong?
>
>
>
> ----- /tmp/qemu.log (last 10-20 lines) [qemu-system-mips64]
> IN:
> 0xffffffffbfc0ee8c:  xori	v0,v0,0x3d
> 0xffffffffbfc0ee90:  li	v1,-1
> 0xffffffffbfc0ee94:  movn	s1,v1,v0
> 0xffffffffbfc0ee98:  lw	ra,52(sp)
> 0xffffffffbfc0ee9c:  move	v0,s1
> 0xffffffffbfc0eea0:  lw	s3,48(sp)
> 0xffffffffbfc0eea4:  lw	s2,44(sp)
> 0xffffffffbfc0eea8:  lw	s1,40(sp)
> 0xffffffffbfc0eeac:  lw	s0,36(sp)
> 0xffffffffbfc0eeb0:  jr	ra
> 0xffffffffbfc0eeb4:  addiu	sp,sp,56
>
> helper_raise_exception_err: 20 0
> do_interrupt enter: PC ffffffffbfc0ee94 EPC 0000000000000000 reserved instruction exception
> do_interrupt: PC ffffffffbfc00380 EPC ffffffffbfc0ee94 cause 10
>     S 00400002 C 00808428 A 0000000000000000 D 0000000000000000

so EPC is set to ffffffffbfc0ee94 which is :
movn     s1,v1,v0

>From what I understand when reading the mips IV manual, the movn ins is
only for mips IV / 32bit and not 64bit. Looks like the qemu code has
been written following this. (This also explains why qemu-system-mips is
fine and not qemu-system-mips64).


Arnaud

Re: [Qemu-devel] u-boot on 'qemu-system-mips64 -M mips'

[KAWAKATSU Noritaka]

Thank you for your reply.

 > so EPC is set to ffffffffbfc0ee94 which is :
 > movn     s1,v1,v0
 >
 >> From what I understand when reading the mips IV manual, the movn ins is
 > only for mips IV / 32bit and not 64bit. Looks like the qemu code has
 > been written following this. (This also explains why qemu-system-mips is
 > fine and not qemu-system-mips64).
 >
 > Arnaud

I understand that the relaation between MIPS32/MIPS64 arch is upper compatible
(from MIPS32 to MIPS64).
I wonder if this fact (the movn ins is only for mips IV / 32bit and not 64bit)
be true, umm.

Please let me know the list of instructions like this (32/64 not compatible)
if you know, or give me a hint to investigate?

Noritata KAWAKATSU.

(2010/06/22 18:09), Arnaud Patard (Rtp) wrote:
> KAWAKATSU Noritaka<kawakatsu.noritaka@interdesigntech.co.jp>  writes:
>
>> Hi,
>
>
> Hi,
>>
>> I have built u-boot binary for 'qemu-system-mips -M mips'.
>> It is fine to run ths u-boot binary.
>> But the same u-boot binary does not run on 'qemu-system-mips64 -M mips'.
>>
>> I do not understand what happends on the qemu-mips64 execution.
>> Is this a bug for qemu-system-mips64 ?
>> Or should I build u-boot binary by another configuration?
>>
>> ------
>> * u-boot building steps
>> (1) build the gcc 4.5 cross-compiler for mips from the source.
>> (2) build u-boot(2010.03) by the (1)compiler.
>> (3) copy the u-boot.bin to /usr/share/qemu/mips_bios.bin
>> * qemu(mips) execution command
>> $ qemu-system-mips -L /usr/share/qemu -d in_asm -nographic
>> * get /tmp/qemu.log
>> the execution seems fine.
>>
>> * qemu(mips64) execution command
>> $ qemu-system-mips64 -L /usr/share/qemu -d in_asm -nographic
>> * get /tmp/qemu.log
>> the execution seems not fine. Something is wrong?
>>
>>
>>
>> ----- /tmp/qemu.log (last 10-20 lines) [qemu-system-mips64]
>> IN:
>> 0xffffffffbfc0ee8c:  xori	v0,v0,0x3d
>> 0xffffffffbfc0ee90:  li	v1,-1
>> 0xffffffffbfc0ee94:  movn	s1,v1,v0
>> 0xffffffffbfc0ee98:  lw	ra,52(sp)
>> 0xffffffffbfc0ee9c:  move	v0,s1
>> 0xffffffffbfc0eea0:  lw	s3,48(sp)
>> 0xffffffffbfc0eea4:  lw	s2,44(sp)
>> 0xffffffffbfc0eea8:  lw	s1,40(sp)
>> 0xffffffffbfc0eeac:  lw	s0,36(sp)
>> 0xffffffffbfc0eeb0:  jr	ra
>> 0xffffffffbfc0eeb4:  addiu	sp,sp,56
>>
>> helper_raise_exception_err: 20 0
>> do_interrupt enter: PC ffffffffbfc0ee94 EPC 0000000000000000 reserved instruction exception
>> do_interrupt: PC ffffffffbfc00380 EPC ffffffffbfc0ee94 cause 10
>>      S 00400002 C 00808428 A 0000000000000000 D 0000000000000000
>
> so EPC is set to ffffffffbfc0ee94 which is :
> movn     s1,v1,v0
>
>> From what I understand when reading the mips IV manual, the movn ins is
> only for mips IV / 32bit and not 64bit. Looks like the qemu code has
> been written following this. (This also explains why qemu-system-mips is
> fine and not qemu-system-mips64).
>
>
> Arnaud
>
>
>

RE: [Qemu-devel] u-boot on 'qemu-system-mips64 -M mips'

[KAWAKATSU, Noritaka]

I report the workaround for u-boot execution on qemu-system-mips64.

> movn     s1,v1,v0
>> From what I understand when reading the mips IV manual, the movn ins 
>> is
> only for mips IV / 32bit and not 64bit. Looks like the qemu code has 
> been written following this. (This also explains why qemu-system-mips 
> is fine and not qemu-system-mips64).

I have rebuilt u-boot by the configuration customed for R4400 architecture:
>From original gcc option script '-march=4kc ..' to '-march=r4400 ..'.
R4400 has inst set without 'movn'.

The binary built by this process runs on 
both 'qemu-system-mips' and 'qemu-system-mips64'.

Thank you.
---
Noritaka KAWAKATSU
-----Original Message-----
From: qemu-devel-bounces+kawakatsu.noritaka=interdesigntech.co.jp@nongnu.org
[mailto:qemu-devel-bounces+kawakatsu.noritaka=interdesigntech.co.jp@nongnu.org] On Behalf Of KAWAKATSU Noritaka
Sent: Tuesday, June 22, 2010 6:49 PM
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] u-boot on 'qemu-system-mips64 -M mips'


Thank you for your reply.

 > so EPC is set to ffffffffbfc0ee94 which is :
 > movn     s1,v1,v0
 >
 >> From what I understand when reading the mips IV manual, the movn ins is  > only for mips IV / 32bit and not 64bit. Looks like
the qemu code has  > been written following this. (This also explains why qemu-system-mips is  > fine and not qemu-system-mips64).
 >
 > Arnaud

I understand that the relaation between MIPS32/MIPS64 arch is upper compatible (from MIPS32 to MIPS64).
I wonder if this fact (the movn ins is only for mips IV / 32bit and not 64bit) be true, umm.

Please let me know the list of instructions like this (32/64 not compatible) if you know, or give me a hint to investigate?

Noritata KAWAKATSU.

(2010/06/22 18:09), Arnaud Patard (Rtp) wrote:
> KAWAKATSU Noritaka<kawakatsu.noritaka@interdesigntech.co.jp>  writes:
>
>> Hi,
>
>
> Hi,
>>
>> I have built u-boot binary for 'qemu-system-mips -M mips'.
>> It is fine to run ths u-boot binary.
>> But the same u-boot binary does not run on 'qemu-system-mips64 -M mips'.
>>
>> I do not understand what happends on the qemu-mips64 execution.
>> Is this a bug for qemu-system-mips64 ?
>> Or should I build u-boot binary by another configuration?
>>
>> ------
>> * u-boot building steps
>> (1) build the gcc 4.5 cross-compiler for mips from the source.
>> (2) build u-boot(2010.03) by the (1)compiler.
>> (3) copy the u-boot.bin to /usr/share/qemu/mips_bios.bin
>> * qemu(mips) execution command
>> $ qemu-system-mips -L /usr/share/qemu -d in_asm -nographic
>> * get /tmp/qemu.log
>> the execution seems fine.
>>
>> * qemu(mips64) execution command
>> $ qemu-system-mips64 -L /usr/share/qemu -d in_asm -nographic
>> * get /tmp/qemu.log
>> the execution seems not fine. Something is wrong?
>>
>>
>>
>> ----- /tmp/qemu.log (last 10-20 lines) [qemu-system-mips64]
>> IN:
>> 0xffffffffbfc0ee8c:  xori	v0,v0,0x3d
>> 0xffffffffbfc0ee90:  li	v1,-1
>> 0xffffffffbfc0ee94:  movn	s1,v1,v0
>> 0xffffffffbfc0ee98:  lw	ra,52(sp)
>> 0xffffffffbfc0ee9c:  move	v0,s1
>> 0xffffffffbfc0eea0:  lw	s3,48(sp)
>> 0xffffffffbfc0eea4:  lw	s2,44(sp)
>> 0xffffffffbfc0eea8:  lw	s1,40(sp)
>> 0xffffffffbfc0eeac:  lw	s0,36(sp)
>> 0xffffffffbfc0eeb0:  jr	ra
>> 0xffffffffbfc0eeb4:  addiu	sp,sp,56
>>
>> helper_raise_exception_err: 20 0
>> do_interrupt enter: PC ffffffffbfc0ee94 EPC 0000000000000000 reserved 
>> instruction exception
>> do_interrupt: PC ffffffffbfc00380 EPC ffffffffbfc0ee94 cause 10
>>      S 00400002 C 00808428 A 0000000000000000 D 0000000000000000
>
> so EPC is set to ffffffffbfc0ee94 which is :
> movn     s1,v1,v0
>
>> From what I understand when reading the mips IV manual, the movn ins 
>> is
> only for mips IV / 32bit and not 64bit. Looks like the qemu code has 
> been written following this. (This also explains why qemu-system-mips 
> is fine and not qemu-system-mips64).
>
>
> Arnaud
>
>
>