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Re: [Qemu-devel] [PATCH] target-arm: ARMv4 emulation
From: |
Marc Andre Tanner |
Subject: |
Re: [Qemu-devel] [PATCH] target-arm: ARMv4 emulation |
Date: |
Fri, 18 Dec 2009 22:32:37 +0100 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
On Tue, Dec 01, 2009 at 09:41:43PM +0100, Filip Navara wrote:
> While most of the ARMv5 instructions are backward compatible with ARMv4, there
> are few important differences. Most notably the stack pop and load
> instructions
> ignore the lowest bit, which is used by ARMv5 to switch to Thumb mode. A
> base-updated data-abort model is used on ARM7TDMI, CP15 coprocessor is not
> present and several instructions of later architectures are not implemented.
>
> This patch introduces flags for the V5, CP15 and ABORT_BU (base-updated abort
> model) features. When V5 feature is not set the bit 0 on POP, LD and LDM of PC
> register is ignored and doesn't swith to/from Thumb mode and several
> instructions are treated as unimplemented (BLX, PLD, BKPT, LDRD, STRD).
>
> Added are processor definitions for ARM7TDMI and ARM920T.
>
> Based on patches by Ulrich Hecht <address@hidden> and Vincent Sanders
> <address@hidden>.
Could someone please review + apply this patch, bonus points if it ends
up in 0.12.
Thanks,
Marc
--
Marc Andre Tanner >< http://www.brain-dump.org/ >< GPG key: CF7D56C0