Re: Help on epia-m 10000 linuxbios VGA

[Santi Mirenna]

At 11.59 03/12/2003, you wrote:
> Hi Santi,
>
> At a minimum you need to check that your arch/i386/lib/idt.c file has the 
> Int 21 and Unsupported Interrupt handler calling code installed:
>
> @@ -175,9 +175,18 @@
>                 eax = 64 * 1024;
>                 ret = 0;
>                 break;
> +#ifdef CONFIG_INT21HANDLER
>   case 0x15:
>           ret=handleint21( &edi, &esi, &ebp, &esp,
>                           &ebx, &edx, &ecx, &eax, &flags);
>           break;
>
> +#endif
>         default:
>                 printk_info(__FUNCTION__ ": Unsupport int #0x%x\n",
>                                         intnumber);
> +#ifdef CONFIG_UNSUPPORTINT_RECOVER
>           unsupportint_recover();
>
> +#endif
>                 break;
>
> and that arch/i386/lib/vgabios.c and mainboard/via/epia-m/mainboard.c 
> respectively have the actual handler routines:
>
> @@ -145,6 +145,13 @@
>  __asm__ (".text\n""real_mode_switch_end:\n");
>  extern char real_mode_switch_end[];
>
> +#ifdef CONFIG_UNSUPPORTINT_RECOVER
> +void unsupportint_recover(void)
> +{
> __asm__ __volatile__ ( "  jmp vgarestart  \n" );
>
> +}
> +#endif
>
> and
>
> @@ -92,3 +176,33 @@
>         final_southbridge_fixup();
>  }
>
> +int handleint21( unsigned long *edi, unsigned long *esi, unsigned long *ebp,
>                     unsigned long *esp, unsigned long *ebx, unsigned 
>
> long *edx,
>                     unsigned long *ecx, unsigned long *eax, unsigned 
>
> long *flags)
> +{
> +int res=-1;
>   switch(*eax&0xffff)
>   {
>   case 0x5f19:
>           break;
>   case 0x5f18:
>           *eax=0x5f;
>           *ebx=0x15; // MCLK = 133, 32M frame buffer
>           res=0;
>           break;
>   case 0x5f02:
>           *eax=0x5f;
>           *ebx=0 | (3<<8);
>           *ecx=5 | (0<<8) | (0<<16);
>           res=0;
>           break;
>   case 0x5f0f:
>           *eax=0x5f;
>           *ebx=0;
>           *ecx=0;
>           *edx=0;
>           res=0;
>           break;
>   }
>   return res;
>
> +}
>
> NOTE: It's possible that you may have patch these in by hand as the 
> original diffs were from an older version of the codebase and things may 
> have changed since then.

All the patch is ok and I get the CVS of  05 2003-July
> A quick check is to make sure there are no *.rej files present which might 
> indicate a patch operation has failed.

all files are patched
> The diffs aren't large, so it's probably worthing checking them by hand to 
> make sure the patches have been properly applied.
>
> Cheers
>
> Ian
>
> At 09:31 03/12/2003, Santi Mirenna wrote:
> > Hi to all, today i make EPIA-M 10000 rom image. i compile to have VGA and 
> > Filo,
> > after apply patch of Dave Ashley and info from Takeshi about RAM ammount
> > VGA now is found by the system but ....
> > In attach you have the output log ....
> > Can someone tell me where i wrong?
> >
> > Dave Ashley reply:
> >
> > You haven't applied all the patch, specifically the handler
> > for the unsupported bios interrupts.
> > This is the bug where it just gets into an endless loop
> > of bios interrupts, so the program needs to exit the
> > bios somehow. -Dave
> >
> > Hi , can some one tell me where to look  ....
> > i made the patch ....where to look Dave to know if the patch is ok ?
> >
> > Thanks.
> >
> > Santi Mirenna