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q800: move VIA1 IRQ from level 1 to level 6 

On a Quadra 800 machine Linux sets via_alt_mapping to 1 and clears port B bit 6 to
ensure that the VIA1 IRQ is delivered at level 6 rather than level 1. Even though
QEMU doesn't yet emulate this behaviour, Linux still installs the VIA1 level 1 IRQ
handler regardless of the value of via_alt_mapping which is why the kernel has been
able to boot until now.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20211020134131.4392-3-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2021-10-20 14:41:25 +01:00 committed by Laurent Vivier
parent e976459b3b
commit 39950b16ec
1 changed files with 1 additions and 1 deletions
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2
hw/m68k/q800.c
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@ -284,7 +284,7 @@ static void q800_init(MachineState *machine)
sysbus = SYS_BUS_DEVICE(via1_dev);
sysbus_realize_and_unref(sysbus, &error_fatal);
sysbus_mmio_map(sysbus, 1, VIA_BASE);
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, 0));
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, 5));
adb_bus = qdev_get_child_bus(via1_dev, "adb.0");
dev = qdev_new(TYPE_ADB_KEYBOARD);