Re: [ECOS] Is there any way to branch in Boot Script

["ariga masahiro" <ariga at link-lab dot co dot jp>]

Hi,Sergei and others,

Thank you,Sergei,for your very "brainwashing" answer.

But although I earnestly grepped "cyg_plf_redboot_startup",
or even "CYGSEM_REDBOOT_PLF_STARTUP",
I could not hit any file in my ecos source directory.

Since your answer is very suitable to "what I want to do",
please elaborate a little more,please?

By the way my target uses SH7709 CPU.

I am looking forward to your kindly answer.

Masahiro Ariga

----- Original Message ----- 
From: "Sergei Gavrikov" <w3sg@SoftHome.net>
To: "ariga masahiro" <ariga@link-lab.co.jp>
Cc: <ecos-discuss@ecos.sourceware.org>
Sent: Thursday, July 19, 2007 3:24 AM
Subject: Re: [ECOS] Is there any way to branch in Boot Script


> On Wed, Jul 18, 2007 at 09:09:07PM +0300, Sergei Gavrikov wrote:
> > On Tue, Jul 17, 2007 at 04:37:33PM +0900, ariga masahiro wrote:
> > > Hi,Everyone,
> > >
> > > I beseech you to help me out of next predicament.
> > >
> > > What I want to do is this:
> > >  In RedBoot Boot Script,read Target Board DIPSW-settled value,
> > >  and compare already-written value in a certain address.
> > > ã(for example,use mcmp command)
> > >  If same, continue next Boot Script command.
> > >  If differs,quit Boot Script and return to RedBoot's prompt.
> > >
> > > My questions are:
> > >  1.Is there any way to know mcmp result(that is ,succeeded or errored).
> > >    Preferably in RedBoot Boot Script.
> > > ã2.Is there any way to use branching statement(like,if-else),
> > >    in RedBoot Boot Script
> >
> > It's pity, but RedBoot != shell, so it hasn't such behaviours. Some guys
> > dream about those behaviours :-) But, every RedBoot command (redboot.h)
> > is just it
> >
> > typedef void cmd_fun(int argc, char *argv[]);
> >
> > Therefore, it is no way to return any result (Ups, I did think about
> > `argv' :). Also, there is no global variable, something like the DOS
> > `errorlevel' (to check/collect the fails) there. More that, if the
> > RedBoot's parser does meet wrong line in a script, it passes the line a
> > bit noisely and then it continues to parse a rest of the script.
> >
> > >  3.Is there any way to realize above-mentioned "what I want to do".
> >
> > I had same needs (to read the DIP switches). And I did use such a way.
> > Well, if your RedBoot/eCos aren't fucked binaries, i.e. if you have the
> > target sources, you can put same stuff in your plf_misc.c file
> >
> > ---------------------------------------------------------->8
> > #include <pkgconf/system.h>
> >
> > #ifdef CYGPKG_REDBOOT
> > #include <redboot.h>            // script declaration
> >
> > #define DIPSW_MASK (1 << 7)     // FIXME: put yours
> >
> > #ifdef CYGSEM_REDBOOT_PLF_STARTUP
> > void
> > cyg_plf_redboot_startup (void)
> > {
> >     int             switches = 0;
> >
> >     // put a code to read the switches here
> >
> >     if (switches & DIPSW_MASK)
> >         // don't run the script
> >         script = 0;
> > }
> > #endif // CYGSEM_REDBOOT_PLF_STARTUP
> > #endif // CYGPKG_REDBOOT
> > ---------------------------------------------------------->8
> >
> > Note: before to build RedBoot with this tweak, set this option in your
> > `ecos.ecc':
> >
> > cdl_option CYGSEM_REDBOOT_PLF_STARTUP {user_value 1};
> >
> > For more details, look at cyg_start () in redboot/current/src/main.c,
> > you would find your own way for that.
>
> A bit more, redboot.cdl contains yet another option... So, with a code
> above, you can run an alternate script instead default one, if you put
> there something like this
>
> cdl_option CYGDAT_REDBOOT_DEFAULT_BOOT_SCRIPT {1 {alt_script}};
>
> Note: a declaration/filling that `alt_script' is your deal, certainly.
>
> Sergei


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