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Re: [Qemu-devel] [PATCH 2/4] rom loader: make vga+rom loading target sp

From: Blue Swirl
Subject: Re: [Qemu-devel] [PATCH 2/4] rom loader: make vga+rom loading target specific
Date: Tue, 13 Oct 2009 19:45:25 +0300

On Tue, Oct 13, 2009 at 6:29 PM, Gerd Hoffmann <address@hidden> wrote:
> On 10/13/09 16:58, Blue Swirl wrote:
>> On Tue, Oct 13, 2009 at 2:06 PM, Gerd Hoffmann<address@hidden>  wrote:
>>> This patch adds a loader-target.c file for target-specific
>>> rom loading functions.  The rom_add_vga() and rom_add_option()
>>> macros are transformed into functions and sticked in there.  They
>>> load the bios on TARGET_I386 and no nothing on other targets.
>> IIRC the VGA cards on non-x86 machines contain ROMs too, some (PPC?
>> Alpha?) machine had a simple x86 emulator just to run the ROM code.
>> Then you could enable the VGA ROM loading unconditionally. So maybe
>> the patch isn't necessary?
> Is the vgabios actually loaded to 0xc0000 (like x86 does) or does it just
> sit in the PCI ROM bar?

No idea, probably not loaded.

>> Otherwise you could add two files without macros, then the files can
>> be compiled just once.
> ... with lot of Makefile.target changes which I wanted to avoid.
> Or is there a simple way to say "all but i386 please use $thisfile.c"?

ifdef TARGET_I386
obj-y += loader-target.o
obj-y += loader-dummy.o

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