Re: [Qemu-devel] Support for BMIPS4380 CPU?

[Aurelien Jarno]

On Thu, Feb 03, 2011 at 10:05:36AM +0100, xeros wrote:
> Hi,

Hi,

> I'd like to ask about support for newer CPUs in QEMU, like this one:
> system type             : BCM3556C0 DTV platform
> processor               : 0
> cpu model               : Broadcom BMIPS4380 V4.4  FPU V0.1
> BogoMIPS                : 403.45
> wait instruction        : yes
> microsecond timers      : yes
> tlb_entries             : 32
> extra interrupt vector  : yes
> hardware watchpoint     : no
> ASEs implemented        : mips16
> shadow register sets    : 1
> core                    : 0
> VCED exceptions         : not available
> VCEI exceptions         : not available
> 
> processor               : 1
> cpu model               : Broadcom BMIPS4380 V4.4  FPU V0.1
> BogoMIPS                : 403.45
> wait instruction        : yes
> microsecond timers      : yes
> tlb_entries             : 32
> extra interrupt vector  : yes
> hardware watchpoint     : no
> ASEs implemented        : mips16
> shadow register sets    : 1
> core                    : 0
> VCED exceptions         : not available
> VCEI exceptions         : not available
> 
> I've tried all the available -cpu and -M options combinations (in
> QEMU from 0.11 to 0.13) but still no luck to even start booting the
> Linux kernel compiled for this CPU.
> When I boot the other Linux system image prepared for 'malta'
> machine and try to run any even static compiled binaries from
> machine which uses the not yet supported CPU I get 'Illegal
> instruction' message.
> 
> 'file' command output on such binaries is:
> busybox: ELF 32-bit LSB executable, MIPS, MIPS32 version 1 (SYSV),
> statically linked, stripped
> 
> While the ones compiled for system in 'malta' QEMU virtual machine is:
> busybox-orig-qemu: ELF 32-bit LSB executable, MIPS, MIPS-I version 1
> (SYSV), statically linked, stripped
> 

You need to emulate a platform and a CPU matching your kernel. Currently
QEMU doesn't support this Broadcom CPU, nor this platform.

Aurelien

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
address@hidden                 http://www.aurel32.net