diff mbox series

[PULL,2/9] q800: move VIA1 IRQ from level 1 to level 6

Message ID 20211022071705.471954-3-laurent@vivier.eu
State New
Headers show
Series [PULL,1/9] mac_via: update comment for VIA1B_vMystery bit | expand

Commit Message

Laurent Vivier Oct. 22, 2021, 7:16 a.m. UTC 
From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

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>
---
 hw/m68k/q800.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c
index fd4855047e3f..15f3067811e1 100644
--- a/hw/m68k/q800.c
+++ b/hw/m68k/q800.c
@@ -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);