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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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38
include/hw/isa/isa.h
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@ -34,6 +34,41 @@ static inline uint16_t applesmc_port(void)
return 0;
}
#define TYPE_ISADMA "isa-dma"
#define ISADMA_CLASS(klass) \
OBJECT_CLASS_CHECK(IsaDmaClass, (klass), TYPE_ISADMA)
#define ISADMA_GET_CLASS(obj) \
OBJECT_GET_CLASS(IsaDmaClass, (obj), TYPE_ISADMA)
#define ISADMA(obj) \
INTERFACE_CHECK(IsaDma, (obj), TYPE_ISADMA)
struct IsaDma {
Object parent;
};
typedef enum {
ISADMA_TRANSFER_VERIFY,
ISADMA_TRANSFER_READ,
ISADMA_TRANSFER_WRITE,
ISADMA_TRANSFER_ILLEGAL,
} IsaDmaTransferMode;
typedef struct IsaDmaClass {
InterfaceClass parent;
IsaDmaTransferMode (*get_transfer_mode)(IsaDma *obj, int nchan);
bool (*has_autoinitialization)(IsaDma *obj, int nchan);
int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
void (*hold_DREQ)(IsaDma *obj, int nchan);
void (*release_DREQ)(IsaDma *obj, int nchan);
void (*schedule)(IsaDma *obj);
void (*register_channel)(IsaDma *obj, int nchan,
DMA_transfer_handler transfer_handler,
void *opaque);
} IsaDmaClass;
typedef struct ISADeviceClass {
DeviceClass parent_class;
} ISADeviceClass;
@ -46,6 +81,7 @@ struct ISABus {
MemoryRegion *address_space;
MemoryRegion *address_space_io;
qemu_irq *irqs;
IsaDma *dma[2];
};
struct ISADevice {
@ -63,6 +99,8 @@ ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
qemu_irq isa_get_irq(ISADevice *dev, int isairq);
void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
IsaDma *isa_get_dma(ISABus *bus, int nchan);
MemoryRegion *isa_address_space(ISADevice *dev);
MemoryRegion *isa_address_space_io(ISADevice *dev);
ISADevice *isa_create(ISABus *bus, const char *name);