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[Bug 1777777] Re: arm9 clock pending (SP804)

From: Thomas Huth
Subject: [Bug 1777777] Re: arm9 clock pending (SP804)
Date: Thu, 09 Jan 2020 17:18:28 -0000

Fix has been included in QEMU v4.2:

** Changed in: qemu
       Status: Confirmed => Fix Released

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  arm9 clock pending (SP804)

Status in QEMU:
  Fix Released

Bug description:
  Hello all,

  I'm using the versatilepb board and the timer Interrupt Mask Status
  register (offset 0x14 of the SP804) does not seem to be working
  properly on the latest qemu-2.12. I tried on the 2.5 (i believe this
  is the mainstream version that comes with Linux) and it works

  What happens is that the pending bit does not seem to be set in some
  scenarios. In my case, I see the timer value decreasing to 0 and then
  being reset to the reload value and neither does the interrupt is
  triggered nor the pending bit is set.

  I believe this is a matter of timing since in the "long" run the
  system eventually catches up (after a few microseconds).

  Thank you

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