OpenE2K/qemu-e2k
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qemu-e2k/hw/char
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Mark Cave-Ayland 319e89cdc3 escc: update the R_SPEC register SPEC_ALLSENT bit when writing to W_TXCTRL1 
The ESCC datasheet states that SPEC_ALLSENT is always set in sync mode and set
in async mode once all characters have cleared the transmitter. Since writes to
SERIAL_DATA use a synchronous chardev API, the guest can never see the state when
transmission is in progress so it is possible to set SPEC_ALLSENT in the
R_SPEC register unconditionally.

This fixes a hang when using the Sun PROM as it attempts to enumerate the
onboard serial devices, and a similar hang in OpenBSD SPARC32 where in both cases
the boot process will not proceed until SPEC_ALLSENT has been set after writing
to W_TXCTRL1.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20211118181835.18497-3-mark.cave-ayland@ilande.co.uk>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-11-21 09:56:52 +00:00
..
avr_usart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
bcm2835_aux.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
cadence_uart.c hw/char: cadence_uart: Log a guest error when device is unclocked or in reset 2021-09-13 16:07:21 +01:00
cmsdk-apb-uart.c chardev: mark explicitly first argument as poisoned 2021-08-05 16:15:33 +04:00
debugcon.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
digic-uart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
escc.c escc: update the R_SPEC register SPEC_ALLSENT bit when writing to W_TXCTRL1 2021-11-21 09:56:52 +00:00
etraxfs_ser.c hw: Replace anti-social QOM type names 2021-03-19 15:18:43 +01:00
exynos4210_uart.c hw/char/exynos4210_uart: Fix missing call to report ready for input 2021-02-02 17:00:54 +00:00
goldfish_tty.c hw/m68k: Fix typo in SPDX tag 2021-11-09 10:11:27 +01:00
grlib_apbuart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
ibex_uart.c hw/char: ibex_uart: Register device in 'input' category 2021-10-07 08:41:33 +10:00
imx_serial.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
ipoctal232.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
Kconfig hw/char: Add config for shakti uart 2021-09-01 11:59:12 +10:00
mcf_uart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
mchp_pfsoc_mmuart.c hw/char/mchp_pfsoc_mmuart: QOM'ify PolarFire MMUART 2021-10-07 08:41:33 +10:00
meson.build hw/char: Add config for shakti uart 2021-09-01 11:59:12 +10:00
nrf51_uart.c chardev: mark explicitly first argument as poisoned 2021-08-05 16:15:33 +04:00
omap_uart.c
parallel-isa.c
parallel.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
pl011.c hw/char/pl011: add support for sending break 2021-08-25 10:48:50 +01:00
renesas_sci.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
riscv_htif.c hw: Do not include hw/sysbus.h if it is not necessary 2021-05-02 17:24:50 +02:00
sclpconsole-lm.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
sclpconsole.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
serial-isa.c
serial-pci-multi.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
serial-pci.c
serial.c chardev: mark explicitly first argument as poisoned 2021-08-05 16:15:33 +04:00
sh_serial.c hw/char/sh_serial: Add device id to trace output 2021-10-30 18:39:37 +02:00
shakti_uart.c hw/char: shakti_uart: Register device in 'input' category 2021-10-07 08:41:33 +10:00
sifive_uart.c hw/char: sifive_uart: Register device in 'input' category 2021-10-07 08:41:33 +10:00
spapr_vty.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
stm32f2xx_usart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
terminal3270.c s390x: css: report errors from ccw_dstream_read/write 2021-04-09 10:52:13 +02:00
trace-events hw/char/sh_serial: Add device id to trace output 2021-10-30 18:39:37 +02:00
trace.h
virtio-console.c chardev: mark explicitly first argument as poisoned 2021-08-05 16:15:33 +04:00
virtio-serial-bus.c qbus: Rename qbus_create_inplace() to qbus_init() 2021-09-30 13:42:10 +01:00
xen_console.c
xilinx_uartlite.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00