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

[Michael Walle <michael@walle.cc>]

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