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| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2021-11-18 18:18:34 +0000 |
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| committer | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2021-11-21 09:56:52 +0000 |
| commit | c29cd47e82df0bc7385cdd49a158d838314daa9e (patch) | |
| tree | e17b19d26b3694212bc4babee384ba119053e968 /docs/devel/writing-monitor-commands.rst | |
| parent | 8627edfb3f1fca24a96a0954148885c3241c10f8 (diff) | |
| download | focaccia-qemu-c29cd47e82df0bc7385cdd49a158d838314daa9e.tar.gz focaccia-qemu-c29cd47e82df0bc7385cdd49a158d838314daa9e.zip | |
escc: always set STATUS_TXEMPTY in R_STATUS on device reset
The "Transmit Interrupts and Transmit Buffer Empty Bit" section of the ESCC datasheet states the following about the STATUS_TXEMPTY bit: "After a hardware reset (including a hardware reset by software), or a channel reset, this bit is set to 1". Update escc_reset() to set the STATUS_TXEMPTY bit in the R_STATUS register on device reset as described which fixes a regression whereby the Sun PROM checks this bit early on startup and gets stuck in an infinite loop if it is not set. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Message-Id: <20211118181835.18497-2-mark.cave-ayland@ilande.co.uk> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'docs/devel/writing-monitor-commands.rst')
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