Re: [MPC7448] machdep_calls

["Sébastien Chrétien" <sebastien.chretien.enseirb@gmail.com>]

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I have no screen that's why I have to use UART. I followed the CPM model in
head_32.S :
#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
setup_cpm_bat:
    lis    r8, 0xf000
    ori    r8, r8,    0x002a
    mtspr    SPRN_DBAT1L, r8

    lis    r11, 0xf000
    ori    r11, r11, (BL_1M << 2) | 2
    mtspr    SPRN_DBAT1U, r11

    blr
#endif

With this code  I can use udbg.

According to you, what is the best way ?

2008/8/18, Benjamin Herrenschmidt <benh@kernel.crashing.org>:
>
> On Mon, 2008-08-18 at 16:17 +0200, Sébastien Chrétien wrote:
> > The mpc7448hpc2 uses a tsi108-bridge. My board uses an IP on a FPGA..
> > I read the code of mpc7448_hpc2.c.
> > It uses a ioremap in order to iniatilize the tsi108 registers. But I
> > have already initialized MMU with my registers in HEAD_32.S. Do I need
> > to use ioremap in setup_arch() ?
>
>
> Why did you hack head_32.S ? You shouldn't do that... This is common
> code, not platform code.
>
> Ben.
>
> >
> >
> >
> > 2008/8/18, Michael Ellerman <michael@ellerman.id.au>:
> >         On Mon, 2008-08-18 at 13:35 +0200, Sébastien Chrétien wrote:
> >         > Can somebody explain me the aim of the
> >         function  "setup_arch" in the
> >         > machine_call structure ?
> >
> >
> >         Is this MPC7448 anything like an mpc7448hpc2 ?
> >
> >         If so maybe you should start by looking at the code for it in:
> >
> >         arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
> >
> >         Even if it's not related, that will give you some idea of what
> >         the
> >         callbacks are for.
> >
> >         cheers
> >
> >         --
> >         Michael Ellerman
> >         OzLabs, IBM Australia Development Lab
> >
> >         wwweb: http://michael.ellerman.id.au
> >         phone: +61 2 6212 1183 (tie line 70 21183)
> >
> >         We do not inherit the earth from our ancestors,
> >         we borrow it from our children. - S.M.A.R.T Person
> >
> >
>
>

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