PReP bootloader VGA console

Hollis Blanchard hollisb at
Sat Aug 7 08:16:03 EST 2004

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.

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

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

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

Hollis Blanchard
IBM Linux Technology Center

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