Re: [Qemu-devel] New documentation for the LatticeMicro32 target

[Programmingkid <programmingkidx@gmail.com>]

> On Jul 18, 2017, at 7:44 AM, Michael Walle <michael@walle.cc> wrote:
> 
> Am 2017-07-17 17:18, schrieb Programmingkid:
>>> On Jul 17, 2017, at 10:56 AM, Programmingkid <programmingkidx@gmail.com> wrote:
>>>> On Jul 17, 2017, at 1:40 AM, Michael Walle <michael@walle.cc> wrote:
>>>> Am 2017-07-09 17:39, schrieb Programmingkid:
>>>>> I just made a documentation page for the LatticeMicro32 target. I need
>>>>> to know its current status, how much of this system is implemented,
>>>>> what software runs on it. If anyone could supply more information that
>>>>> would be appreciated. Pictures of this target running would be great
>>>>> as well. Thanks.
>>>>> Here is the page: http://wiki.qemu.org/Documentation/Platforms/LatticeMico32
>>>> Hi,
>>>> thank you for your efforts. I have to admit that the current status is unknown.
>>>> I've just compiled the latest head and it looks like the BQL is missing for the interrupt helpers. I'll post a patch soon. With the patch, the basic stuff is working but there seems to be an issue with OpenGL.
>>>> You can read the quickstart instructions at:
>>>> http://milkymist.walle.cc/README.qemu
>>>> The flash image isn't working because it will boot right into the visualization mode, which is using the OpenGL stuff. The "-kernel flickernoise" method is working though. You can get the flickernoise binary at:
>>>> http://milkymist.walle.cc/updates/current/flickernoise
>>>> Besides the milkymist emulation, there is plain lm32 emulation based on the Lattice reference design which should be ok, because the tests are working (make -C tests/tcg/lm32 check)
>>>> -michael
>>> Thank you for all this information. It has been added to the wiki page.
>> I just tried qemu-system-lm32 and it crashed.
>> Command-line: qemu-system-lm32 -M milkymist -kernel flickernoise
>> Error message: audio: Failed to create voice `mm_ac97.in'
>> **
>> ERROR: /accel/tcg/tcg-all.c:42:tcg_handle_interrupt: assertion failed:
>> (qemu_mutex_iothread_locked())
>> Abort trap: 6
>> Host: Mac OS 10.12.5
> 
> As I said before, I guess the BQL is missing here. Try the following patch:
> 
> diff --git a/target/lm32/op_helper.c b/target/lm32/op_helper.c
> index 2177c8ad12..93b8d09794 100644
> --- a/target/lm32/op_helper.c
> +++ b/target/lm32/op_helper.c
> @@ -102,12 +102,16 @@ void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
> 
> void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
> {
> +    qemu_mutex_lock_iothread();
>     lm32_pic_set_im(env->pic_state, im);
> +    qemu_mutex_unlock_iothread();
> }
> 
> void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
> {
> +    qemu_mutex_lock_iothread();
>     lm32_pic_set_ip(env->pic_state, im);
> +    qemu_mutex_unlock_iothread();
> }
> 
> void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)
> 
> 
> 
> -michael
> 

Thank you very much for the patch. It fixed the problem. Now I can take a picture of the screen and add it to the wiki page.