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author | Hervé Poussineau <hpoussin@reactos.org> | 2016-02-03 11:28:57 -0500 |
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committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:31:26 -0600 |
commit | 1d20b13dbaf32e29484a81abeb6e8e0bdab7bb0d (patch) | |
tree | c6db9b6288225f5f438e704ece39b1eee202bfec /include/hw/isa | |
parent | 689e691fabf2583d90e47f568997945883c27b6a (diff) | |
download | hqemu-1d20b13dbaf32e29484a81abeb6e8e0bdab7bb0d.zip hqemu-1d20b13dbaf32e29484a81abeb6e8e0bdab7bb0d.tar.gz |
isa: add an ISA DMA interface, and store it within the ISA bus
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>
Diffstat (limited to 'include/hw/isa')
-rw-r--r-- | include/hw/isa/isa.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h index 4af8730..8de439c 100644 --- a/include/hw/isa/isa.h +++ b/include/hw/isa/isa.h @@ -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); |