Re: [Xen-devel] [PATCH 1/7] vgabios: Output to Qemu debug port instead of using Bochs one

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2012-05-04 at 13:36 +0100, Frediano Ziglio wrote:
> Bios was outputing into port 0xe9 while Qemu use 0x12

0xe9 is also the Xen HVM debug port (see hvm_print_line), don't be
confused by the fact that it happens to be the same as the bochs port.

Ian.

> Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
> ---
>  tools/firmware/vgabios/vgabios.c |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/firmware/vgabios/vgabios.c 
> b/tools/firmware/vgabios/vgabios.c
> index a9dbe00..e0b1ed9 100644
> --- a/tools/firmware/vgabios/vgabios.c
> +++ b/tools/firmware/vgabios/vgabios.c
> @@ -3811,9 +3811,9 @@ void printf(s)
>          for (i=0; i<format_width; i++) {
>            nibble = (arg >> (4 * digit)) & 0x000f;
>            if (nibble <= 9)
> -            outb(0xe9, nibble + '0');
> +            outb(0x12, nibble + '0');
>            else
> -            outb(0xe9, (nibble - 10) + 'A');
> +            outb(0x12, (nibble - 10) + 'A');
>            digit--;
>            }
>          in_format = 0;
> @@ -3823,7 +3823,7 @@ void printf(s)
>        //  }
>        }
>      else {
> -      outb(0xe9, c);
> +      outb(0x12, c);
>        }
>      s ++;
>      }



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