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[Qemu-devel] ColdFire/m68k target
From: |
Paul Brook |
Subject: |
[Qemu-devel] ColdFire/m68k target |
Date: |
Sun, 22 Oct 2006 01:44:21 +0100 |
User-agent: |
KMail/1.9.4 |
I've just committed ColdFire/M68K target support to cvs. This implements
usermode emulation for ColdFire CPUs, including the FPU. The CPU emulation
has been reasonably well tested, but linux syscall emulation only lightly
tested.
For those that don't know, ColdFire is a subset of the old m68k architecture,
with a few minor differences, and a slightly different FPU.
I'll probably be implementing full system emulation sometime (Freescale
M5xxxEVB dev board).
M68k code will not run on the current emulation. Implementing the missing 68k
bits (addressing modes and bitfield instructions) probably wouldn't be that
hard. Implementing 68881 FPU emulation is a bit harder 'cos it
uses "extended" precision registers.
The code is a bit different to most other qemu targets because I originally
wrote it for my code generation backend rather than dyngen. The main
translation code is unmodified, with glue to make it work with dyngen. For
this reason the generated code isn't as efficient as it could be.
Paul
P.S.
Anyone wanting to play with ColdFire emulation can find toolchains at
http://www.codesourcery.com/gnu_toolchains/coldfire/index_html
- [Qemu-devel] ColdFire/m68k target,
Paul Brook <=