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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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5
hw/nubus/nubus-bus.c
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@ -86,13 +86,14 @@ static void nubus_init(Object *obj)
memory_region_init_io(&nubus->super_slot_io, obj, &nubus_super_slot_ops,
nubus, "nubus-super-slots",
NUBUS_SUPER_SLOT_NB * NUBUS_SUPER_SLOT_SIZE);
(NUBUS_SUPER_SLOT_NB + 1) * NUBUS_SUPER_SLOT_SIZE);
memory_region_init_io(&nubus->slot_io, obj, &nubus_slot_ops,
nubus, "nubus-slots",
NUBUS_SLOT_NB * NUBUS_SLOT_SIZE);
nubus->current_slot = NUBUS_FIRST_SLOT;
nubus->slot_available_mask = MAKE_64BIT_MASK(NUBUS_FIRST_SLOT,
NUBUS_SLOT_NB);
}
static void nubus_class_init(ObjectClass *oc, void *data)