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isa: add an ISA DMA interface, and store it within the ISA bus

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This will permit to deprecate global DMA_*() functions.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Message-id: 1453843944-26833-11-git-send-email-hpoussin@reactos.org
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Hervé Poussineau 2016-02-03 11:28:57 -05:00 • committed by John Snow
parent f5f19ee2e4
commit 5484f30b2c
3 changed files with 60 additions and 0 deletions
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21
hw/isa/isa-bus.c
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@ -37,6 +37,12 @@ static void isa_bus_class_init(ObjectClass *klass, void *data)
k->get_fw_dev_path = isabus_get_fw_dev_path;
}
static const TypeInfo isa_dma_info = {
.name = TYPE_ISADMA,
.parent = TYPE_INTERFACE,
.class_size = sizeof(IsaDmaClass),
};
static const TypeInfo isa_bus_info = {
.name = TYPE_ISA_BUS,
.parent = TYPE_BUS,
@ -90,6 +96,20 @@ void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
dev->nirqs++;
}
void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
{
assert(bus && dma8 && dma16);
assert(!bus->dma[0] && !bus->dma[1]);
bus->dma[0] = dma8;
bus->dma[1] = dma16;
}
IsaDma *isa_get_dma(ISABus *bus, int nchan)
{
assert(bus);
return bus->dma[nchan > 3 ? 1 : 0];
}
static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
{
if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
@ -223,6 +243,7 @@ static const TypeInfo isa_device_type_info = {
static void isabus_register_types(void)
{
type_register_static(&isa_dma_info);
type_register_static(&isa_bus_info);
type_register_static(&isabus_bridge_info);
type_register_static(&isa_device_type_info);