diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2018-08-24 13:17:40 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-08-24 13:17:40 +0100 |
| commit | 93739075d28ce81ae06237b48084f26a377cdcad (patch) | |
| tree | 6c8645f36ae86f1668f279dedd5b24a43955f28d /include | |
| parent | a1982f90a42b22f2858e7d8497ab7223cd49b65d (diff) | |
hw/misc/mps2-fpgaio: Implement PSCNTR and COUNTER
In the MPS2 FPGAIO, PSCNTR is a free-running downcounter with
a reload value configured via the PRESCALE register, and
COUNTER counts up by 1 every time PSCNTR reaches zero.
Implement these counters.
We can just increment the counters migration subsection's
version ID because we only added it in the previous commit,
so no released QEMU versions will be using it.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-3-peter.maydell@linaro.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/misc/mps2-fpgaio.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/hw/misc/mps2-fpgaio.h b/include/hw/misc/mps2-fpgaio.h index ec057d38c7..69e265cd4b 100644 --- a/include/hw/misc/mps2-fpgaio.h +++ b/include/hw/misc/mps2-fpgaio.h @@ -37,6 +37,12 @@ typedef struct { uint32_t prescale; uint32_t misc; + /* QEMU_CLOCK_VIRTUAL time at which counter and pscntr were last synced */ + int64_t pscntr_sync_ticks; + /* Values of COUNTER and PSCNTR at time pscntr_sync_ticks */ + uint32_t counter; + uint32_t pscntr; + uint32_t prescale_clk; /* These hold the CLOCK_VIRTUAL ns tick when the CLK1HZ/CLK100HZ was zero */ |