kernel for mips32 ?

[Sergio Monteiro Basto]

Hi, List 

I see that we have kernel for mips malta , but I'd like build a kernel
for mips 32  

# cat /proc/cpuinfo 
system type : Realtek Venus 
processor : 0 
cpu model : MIPS 4KEc V6.4

I am studying (as hobby) put a newer kernel on a multimedia player 

http://minimodding.com/tiki-index.php?page=InstalBB116Snap#comments

So can we build a kernel for a mispel ?

I have others questions like why a kernel 2.6.26 ? and not newer ? 
Basically because some hardware support may need kernels newer.

Thanks in advance,
-- 
Sérgio M. B.

Hi Sergio,

在 2010-08-15日的 02:10 +0100，Sergio Monteiro Basto写道：
>  Hi, List 
>  
>  I see that we have kernel for mips malta , but I'd like build a kernel
>  for mips 32  
>  
>  # cat /proc/cpuinfo 
>  system type : Realtek Venus 
>  processor : 0 
>  cpu model : MIPS 4KEc V6.4 
4KEc is a common core found in various SoCs. According to
http://www.linux-mips.org/wiki/Realtek_SOC , Realtek has some MIPS based
chips that supported by linux-mips.

>  
>  I am studying (as hobby) put a newer kernel on a multimedia player 
>  
>  http://minimodding.com/tiki-index.php?page=InstalBB116Snap#comments
>  
>  So can we build a kernel for a mispel ? 
A linux-mips kernel can be downloaded by
http://www.linux-mips.org/wiki/Getting_the_kernel . The latest release
is 2.6.35.

>  
>  I have others questions like why a kernel 2.6.26 ? and not newer ? 
>  Basically because some hardware support may need kernels newer. 
The latest kernel RPM of Fedora-MIPS is
kernel-vanilla-2.6.35-85.fc13.mips64el.rpm that can be downloaded from
http://lazyfai.dyndns.org/Fedora-13-RPMS-MIPS/Packages/ . However,
whatever version it is, it is not for your player. Currently Fedora-MIPS
kernel can boot only on Loongson2F-based nettops and netbooks.

Find and build a suitable kernel for your player from linux-mips.org,
not from Fedora-MIPS. And, the user space packages are compiled against
mips3 and abi=n32. I don't know if they can be run on 4KEc. Maybe you
can have a try ;)

>  
>  Thanks in advance,
>  _______________________________________________
>  mips mailing list
>  mips(a)lists.fedoraproject.org
>  https://admin.fedoraproject.org/mailman/listinfo/mips

[Sergio Monteiro Basto]

Hi,
On Sun, 2010-08-15 at 12:49 +0800, Xin Zhen wrote: 
>  Hi Sergio,
>  
>  在 2010-08-15日的 02:10 +0100，Sergio Monteiro Basto写道：
>  > Hi, List 
>  > 
>  > I see that we have kernel for mips malta , but I'd like build a kernel
>  > for mips 32  
>  > 
>  > # cat /proc/cpuinfo 
>  > system type : Realtek Venus 
>  > processor : 0 
>  > cpu model : MIPS 4KEc V6.4
>  
>  4KEc is a common core found in various SoCs. According to
>  http://www.linux-mips.org/wiki/Realtek_SOC , Realtek has some MIPS based
>  chips that supported by linux-mips. 
more info of "my player" http://rtd1261.wikidot.com/ is a rtd1261. Is
running a kernel 2.6.12-VENUS which a kernel modified by Realteak it
self, I think. 
Some of support for realtek wireless has been add to main kernel much
more later, so I have a little hope , with a newer kernel I can have
support for "my player". rtd1261 also have busybox as OS. 
So seems, at this point, is not so hard put there a new kernel :) .    

>  > I am studying (as hobby) put a newer kernel on a multimedia
> player 
>  > 
>  > http://minimodding.com/tiki-index.php?page=InstalBB116Snap#comments
>  > 
>  > So can we build a kernel for a mispel ?
>  
>  A linux-mips kernel can be downloaded by
>  http://www.linux-mips.org/wiki/Getting_the_kernel . The latest release
>  is 2.6.35.
>  
>  > 
>  > I have others questions like why a kernel 2.6.26 ? and not newer ? 
>  > Basically because some hardware support may need kernels newer.
>  
>  The latest kernel RPM of Fedora-MIPS is
>  kernel-vanilla-2.6.35-85.fc13.mips64el.rpm that can be downloaded from
>  http://lazyfai.dyndns.org/Fedora-13-RPMS-MIPS/Packages/ . However,
>  whatever version it is, it is not for your player. Currently Fedora-MIPS
>  kernel can boot only on Loongson2F-based nettops and netbooks. 
yes, I know is not for my player , 

>  Find and build a suitable kernel for your player from
> linux-mips.org,
>  not from Fedora-MIPS. And, the user space packages are compiled against
>  mips3 and abi=n32. I don't know if they can be run on 4KEc. Maybe you
>  can have a try ;) 
but kernel-vanilla-2.6.35-85.fc13.src.rpm , can't be compile to mipsel
arch ? 
What I need ? 
With buildroot , I can build many apps (on fedora13) that work in the
box, but boot a new kernel, I still have some doubts.
  
Thanks,
-- 
Sérgio M. B.

在 2010-08-15日的 16:01 +0100，Sergio Monteiro Basto写道：
>  
>  > Find and build a suitable kernel for your player from linux-mips.org,
>  > not from Fedora-MIPS. And, the user space packages are compiled against
>  > mips3 and abi=n32. I don't know if they can be run on 4KEc. Maybe you
>  > can have a try ;)
>  
>  but kernel-vanilla-2.6.35-85.fc13.src.rpm , can't be compile to mipsel
>  arch ? 
>  What I need ? 
>  With buildroot , I can build many apps (on fedora13) that work in the
>  box, but boot a new kernel, I still have some doubts. 
Booting a SoC is not a kernel-only job. It involves bootloader, the arch
and board-specific codes and drivers. People usually start their hack
from the vendor's code, the bootloader and the kernel with a lot of
modifications, if the source is released. I won't suggest you start from
vanilla or fedora kernel.

For a vanilla kernel, start with: ARCH=mips make menuconfig, and then
build with your buildroot compiler.

>    
>  Thanks,
>  _______________________________________________
>  mips mailing list
>  mips(a)lists.fedoraproject.org
>  https://admin.fedoraproject.org/mailman/listinfo/mips

[Sergio Monteiro Basto]

On Mon, 2010-08-16 at 11:50 +0800, Xin Zhen wrote: 
>  在 2010-08-15日的 16:01 +0100，Sergio Monteiro Basto写道：
>  > 
>  > > Find and build a suitable kernel for your player from linux-mips.org,
>  > > not from Fedora-MIPS. And, the user space packages are compiled against
>  > > mips3 and abi=n32. I don't know if they can be run on 4KEc. Maybe you
>  > > can have a try ;)
>  > 
>  > but kernel-vanilla-2.6.35-85.fc13.src.rpm , can't be compile to mipsel
>  > arch ? 
>  > What I need ? 
>  > With buildroot , I can build many apps (on fedora13) that work in the
>  > box, but boot a new kernel, I still have some doubts.
>  
>  Booting a SoC is not a kernel-only job. It involves bootloader, the arch
>  and board-specific codes and drivers. People usually start their hack
>  from the vendor's code, the bootloader and the kernel with a lot of
>  modifications, if the source is released. I won't suggest you start from
>  vanilla or fedora kernel.
>   
After , look at linux-mips.org, seems that we don't have RTD128x option
neither realtek .
Looking for a big patch between linux-2.6.12 and linux-2.6.12-VENUS , 
They do a specif configuration for REALTEK_VENUS: 

--- tmp/linux-2.6.12/arch/mips/Kconfig 
+++ GPL/linux-2.6.12/arch/mips/Kconfig  
(...)
+config REALTEK_VENUS
+       bool "Support for REALTEK Venus board"
+#      select BOOT_ELF32
+       select IRQ_CPU# define this will include irq_cpu.o, and this is
for the interrupt.
+       select REALTEK_VENUS_SERIAL_PORT
+       select DMA_NONCOHERENT
+       select GENERIC_ISA_DMA
+       select HW_HAS_PCI
+       select REALTEK_BOARDS_GEN
+       select SYS_SUPPORTS_32BIT_KERNEL
+       select SYS_SUPPORTS_LITTLE_ENDIAN
+       help
+         This enables support for the REALTEK Technologies Venus board.

and a new directory :
+source "arch/mips/realtek-boards/Kconfig"

I saw the code, they change files like linux-2.6.12/init/main.c, and
many in "core" code, which I'm not capable to port to a new kernel. 
Conclusion I can't build a new kernel for this devices. 
but I learn a lot, Thanks for your help.   
-- 
Sérgio M. B.