Re: strange early_printk - board_setup problem

[EXTERNAL B. M. (P. ST-FIR/Eng) <ext...@de...>]

...

> Also, if you give it a sh_mv=3Dfoo, do you get the proper list?=20
No.=20
>> When I tried to specify any other string (including the correct =
mv_name) to sh_mv=3D booting stopped after=20
>> [ =A0 =A00.000000] console [sercon0] enabled

> Beyond that, what boot loader are you using?=20
I don't have a real bootloader on the board. I load zImage at address =
0x8c210000 with a JTAG debugger.=20

> You might also try bumping the load address up higher in case=20
> the boot loader happens to be stepping on something.
Afaik no other address will work.

> Have you tried this with sh-bios support  enabled and disabled in the =
kernel?=20
> Are the results the same for both?=20
I don't have a BIOS on the board. Enabling the sh-bios in the kernel =
will break the kernel.
=20
> If that doesn't reveal any clues, can you build with debugging symbols
> and post your kernel image somewhere so I can disassemble it?
Not possible at the moment, but i will do that in about 7 hours.

> That's a bit unusual. Can you print out what the size of the machvec
> section is (ie, &__machvec_end - &__machvec_start)?=20

Yes, and in combination with nm this gives some interesting results:

This is without earlyprintk. Note that mv_mpr2 has the same address as =
__machvec_start

[    0.000000] Linux version 2.6.23-rc2 (markus@linux-markus) (gcc =
version 3.4.6) #38 Tue Aug 7 09:25:06 CEST 2007
[    0.000000] machvec start: 0x8c2c1a70 machvec end 0x8c2c1b20  size: =
0x2c
[    0.000000] Booting machvec: mpr2
[    0.000000] Magic Panel Release 2 A.2

markus@linux-markus:~/kernels$ sh3-unknown-linux-gnu-nm vmlinux | grep =
mpr2
8c2c18c0 t __initcall_mpr2_devices_setup6
8c2c1b00 T init_mpr2_IRQ
8c2c03d4 t mpr2_devices
8c2b1870 t mpr2_devices_setup
8c2b16d0 t mpr2_setup
8c2c1a70 t mv_mpr2

This is with earlyprintk enabled. Now size and addresses have changed =
and mv_mpr2 isn't at the beginning of the machvec anymore.

[    0.000000] Linux version 2.6.23-rc2 (markus@linux-markus) (gcc =
version 3.4.6) #36 Tue Aug 7 09:19:31 CEST 2007
[    0.000000] console [sercon0] enabled
[    0.000000] machvec start: 0x8c2c1bfc machvec end 0x8c2c1cb0  size: =
0x2d
[    0.000000] Booting machvec: ./
[    0.000000] Node 0: start_pfn =3D 0xc000, low =3D 0xff00

markus@linux-markus:~/kernels$ sh3-unknown-linux-gnu-nm vmlinux | grep =
mpr2
8c2c1a4c t __initcall_mpr2_devices_setup6
8c2c1c90 T init_mpr2_IRQ
8c2c0554 t mpr2_devices
8c2b19e0 t mpr2_devices_setup
8c2b1840 t mpr2_setup
8c2c1c00 t mv_mpr2


Regards

Markus