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nubus: use bitmap to manage available slots

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Convert nubus_device_realize() to use a bitmap to manage available slots to allow
for future Nubus devices to be plugged into arbitrary slots from the command line
using a new qdev "slot" parameter for nubus devices.

Update mac_nubus_bridge_init() to only allow slots 0x9 to 0xe on Macintosh machines
as documented in "Designing Cards and Drivers for the Macintosh Family".

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210924073808.1041-5-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2021-09-24 08:37:52 +01:00 • committed by Laurent Vivier
parent 90be1dea50
commit 03deab9940
5 changed files with 41 additions and 14 deletions
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4
hw/nubus/mac-nubus-bridge.c
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@ -18,6 +18,10 @@ static void mac_nubus_bridge_init(Object *obj)
s->bus = NUBUS_BUS(qbus_create(TYPE_NUBUS_BUS, DEVICE(s), NULL));
/* Macintosh only has slots 0x9 to 0xe available */
s->bus->slot_available_mask = MAKE_64BIT_MASK(MAC_NUBUS_FIRST_SLOT,
MAC_NUBUS_SLOT_NB);
sysbus_init_mmio(sbd, &s->bus->super_slot_io);
sysbus_init_mmio(sbd, &s->bus->slot_io);
}