PReP bootloader VGA console

Tom Rini trini at
Tue Aug 10 09:23:27 EST 2004

On Fri, Aug 06, 2004 at 05:16:03PM -0500, Hollis Blanchard wrote:

> This is the minimal patch needed to get the bootloader prompt on VGA
> for PReP.
> --- 1.1/arch/ppc/boot/simple/misc-prep.c        Mon Mar  1 17:34:28 2004
> +++ edited/arch/ppc/boot/simple/misc-prep.c     Fri Aug  6 17:21:00 2004
> @@ -89,6 +89,7 @@
>         }
>  #if defined(CONFIG_VGA_CONSOLE)
> +       serial_fixups();
>         vga_init((unsigned char *)0xC0000000);
>  #endif /* CONFIG_VGA_CONSOLE */
> Of course that looks funny doesn't it? "serial_fixups()" just sets
> ISA_io, so should probably be called something else.

Curse you folks with a video display! :)

> Also it's written in assembly in legacy.S (with matching chrpmap.S),
> which could easily become prepmap.c and chrpmap.c.

OK.  So when I wrote all of this initially, there was, I could have
sworn, a good reason for doing 'serial_fixups' as an asm routine, and
not just a define or C func.  But, I can't recall why now.

So if you'd be so kind as to whip up, and test, a patch which switches
us to defines, or a C func, whichever ends up being easier, I'd
appreciate it.  Thanks.

> Even better ISA_io could have a #define that's used in misc.c and
> misc-prep.c...

and ns16550.c

> But all of this would require more digging through makefiles and weak
> aliases than it's probably worth.

'cmon, you know you want to. :)

Tom Rini

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