Problem booting linux-2.4.4-2001-07-23 on EST SBC8260 with ppcboot 1.0.4

Problem booting linux-2.4.4-2001-07-23 on EST SBC8260 with ppcboot 1.0.4

[Craig MacDonald]

I am trying to get linux 2.4 running on an EST SBC8260.
It seems others have this board working correctly, so
I must be doing something wrong.
It works up to executing the rfi in turn_on_mmu, but
it doesn't seem to reach start_here.

I have modified linux to use the correct bd_info structure
in ppcboot.h and the immr_base value. Below is some information
from ppcboot.


PPCBoot 1.0.4 (Aug 12 2001 - 07:16:41)

MPC8260 Reset Status: External Soft

MPC8260 Clock Configuration
 - Bus-to-Core Mult 4x, VCO Div 2, 60x Bus Freq  25-75 , Core Freq 100-300
 - dfbrg 0, corecnf 0x0a, busdf 3, cpmdf 1, plldf 0, pllmf 1
 - vco_out  132000000, cpm_clk   66000000, bus_clk   33000000
 - scc_clk   33000000, brg_clk   33000000, cpu_clk  132000000

CPU:   MPC8260 (Rev 01, Mask A.1 1K22A-XC) at 132 MHz
Board: EST SBC8260
DRAM:  32 MB
FLASH:  4 MB
BEDBUG Ready
In:    serial
Out:   serial
Err:   serial

bdinfo
------------------------
memstart    = 0x00000000
memsize     = 0x02000000
flashstart  = 0xfff00000
flashsize   = 0x00400000
flashoffset = 0x00040000
sramstart   = 0x00000000
sramsize    = 0x00000000
immr_base   = 0x0f000000
bootflags   = 0x00000001
intfreq     =    132 MHz
busfreq     =     33 MHz
ethaddr     = 00:02:6A:00:00:55
  IP addr     = 10.0.0.62
  baudrate    =  19200 bps
getc        = 0x01fd0ec8
tstc        = 0x01fd0ef8
putc        = 0x01fd0e18
puts        = 0x01fd0e84
printf      = 0x01fcd57c
install_hdlr= 0x01fd1a74
free_hdlr   = 0x01fd1b14
malloc      = 0x01fcbfe4

TFTP from server 10.0.0.12; our IP address is 10.0.0.62
Filename 'linux'.
Load address: 0x100000
Loading: /
done
Bytes transferred = 458355 (6fe73 hex)
free        = 0x01fcc4d8
## Booting image at 00100000 ...
   Image Name:   linux 2.4
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    458291 Bytes = 447 kB = 0 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

Thanks,
Craig MacDonald


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Re: Problem booting linux-2.4.4-2001-07-23 on EST SBC8260 with ppcboot 1.0.4

[Kevin Fry]

You should have ppcboot remap the IMMR to 0xF0000000 in the start of ppcboot
code. Otherwise it will interfere with Linux memory mapping. See this file for
all the info you need.

http://www.linuxhq.com/kernel/v2.4/doc/powerpc/SBC8260_memory_mapping.txt.html

gl!

Kevin Fry


Craig MacDonald wrote:

> I am trying to get linux 2.4 running on an EST SBC8260.
> It seems others have this board working correctly, so
> I must be doing something wrong.
> It works up to executing the rfi in turn_on_mmu, but
> it doesn't seem to reach start_here.
>
> I have modified linux to use the correct bd_info structure
> in ppcboot.h and the immr_base value. Below is some information
> from ppcboot.
>
> PPCBoot 1.0.4 (Aug 12 2001 - 07:16:41)
>
> MPC8260 Reset Status: External Soft
>
> MPC8260 Clock Configuration
>  - Bus-to-Core Mult 4x, VCO Div 2, 60x Bus Freq  25-75 , Core Freq 100-300
>  - dfbrg 0, corecnf 0x0a, busdf 3, cpmdf 1, plldf 0, pllmf 1
>  - vco_out  132000000, cpm_clk   66000000, bus_clk   33000000
>  - scc_clk   33000000, brg_clk   33000000, cpu_clk  132000000
>
> CPU:   MPC8260 (Rev 01, Mask A.1 1K22A-XC) at 132 MHz
> Board: EST SBC8260
> DRAM:  32 MB
> FLASH:  4 MB
> BEDBUG Ready
> In:    serial
> Out:   serial
> Err:   serial
>
> bdinfo
> ------------------------
> memstart    = 0x00000000
> memsize     = 0x02000000
> flashstart  = 0xfff00000
> flashsize   = 0x00400000
> flashoffset = 0x00040000
> sramstart   = 0x00000000
> sramsize    = 0x00000000
> immr_base   = 0x0f000000
> bootflags   = 0x00000001
> intfreq     =    132 MHz
> busfreq     =     33 MHz
> ethaddr     = 00:02:6A:00:00:55
>   IP addr     = 10.0.0.62
>   baudrate    =  19200 bps
> getc        = 0x01fd0ec8
> tstc        = 0x01fd0ef8
> putc        = 0x01fd0e18
> puts        = 0x01fd0e84
> printf      = 0x01fcd57c
> install_hdlr= 0x01fd1a74
> free_hdlr   = 0x01fd1b14
> malloc      = 0x01fcbfe4
>
> TFTP from server 10.0.0.12; our IP address is 10.0.0.62
> Filename 'linux'.
> Load address: 0x100000
> Loading: /
> done
> Bytes transferred = 458355 (6fe73 hex)
> free        = 0x01fcc4d8
> ## Booting image at 00100000 ...
>    Image Name:   linux 2.4
>    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>    Data Size:    458291 Bytes = 447 kB = 0 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
>    Uncompressing Kernel Image ... OK
>
> Thanks,
> Craig MacDonald
>


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Re: Problem booting linux-2.4.4-2001-07-23 on EST SBC8260 with ppcboot 1.0.4

[Wolfgang Denk]

In message <3BABC303.1674D66E@carts.com> you wrote:
>
> You should have ppcboot remap the IMMR to 0xF0000000 in the start of ppcboot
> code. Otherwise it will interfere with Linux memory mapping. See this file for
> all the info you need.

Right!

> > I am trying to get linux 2.4 running on an EST SBC8260.
> > It seems others have this board working correctly, so

Probably these others just use the  PPCBoot  standard  configuration,
and you changed (read: broke) it?

> > It works up to executing the rfi in turn_on_mmu, but
> > it doesn't seem to reach start_here.

I'm not sure what makes you think this is the case. Did  you  by  any
chance   try  to  sngle-step  with  a  JTAG  debugger  over  the  RFI
instruction?

This will not work.

> > bdinfo
> > ------------------------
> > memstart    = 0x00000000
> > memsize     = 0x02000000
> > flashstart  = 0xfff00000
> > flashsize   = 0x00400000
> > flashoffset = 0x00040000
> > sramstart   = 0x00000000
> > sramsize    = 0x00000000
> > immr_base   = 0x0f000000
^^^^^^^^^^^^^

This is wrong. It should be 0xF0000000  as  it  is  in  the  standard
configuration  for  the  SBC8260  board  that  comes with the PPCBoot
sources. Don't change it.

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
The explanation requiring the fewest assumptions is the  most  likely
to be correct.                                    -- William of Occam

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