Re: [Qemu-devel] qemu softmmu_template.h softmmu_header.h

[Fabrice Bellard <fabrice.bellard@free.fr>]

Johan Rydberg wrote:
> Fabrice Bellard <fabrice.bellard@free.fr> wrote:
> 
> : Log message:
> : 	Software MMU support (used for memory mapped devices such as VGA)
> 
> Have you done any benchmarking using these changes?  Are there any improvement
> over my software TLB scheme?

It is the same system as you proposed. I have a slightly faster assembly 
version, but I won't use it until QEMU is more stable. There will be two 
modes:

1) No soft MMU, except if Memory I/O is detected for a given translation 
block (for example for VGA accesses in text or planar modes).

2) Soft MMU for everything in order to launch any OS.

I still don't know if there will be a single executable for mode 1 and 2.

Currently I do my testings only with mode 2. Now that it begins to be 
usable (I can use keyboard, mouse and VGA on some DOS programs) I will 
commit all the necessary stuff.

A question to everyone : is it necessary to keep the specific Linux 
booting system now that QEMU can boot by using the BIOS ? It can give 
problems as the VGA is not initialized before Linux is launched if no 
BIOS is used.

Fabrice.