049f7adbd5
Some users prefer a single callback with length passed as parameter to using b/w/l callbacks. It would maybe be cleaner to just pass length to existing callbacks but that's a lot of churn. So for now add a wrapper. For convenience use pcibus_t for address so a single callback can be used for pci io and pci memory. I did have to resort to preprocessor to reduce code duplication. It is however slightly more straightforward, and better contained than what we had with pci_host_template.h. Again, it would go away if we just passed len to existing callbacks. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
28 lines
969 B
C
28 lines
969 B
C
#ifndef READ_WRITE_HANDLER_H
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#define READ_WRITE_HANDLER_H
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#include "qemu-common.h"
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#include "ioport.h"
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typedef struct ReadWriteHandler ReadWriteHandler;
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/* len is guaranteed to be one of 1, 2 or 4, addr is guaranteed to fit in an
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* appropriate type (io/memory/etc). They do not need to be range checked. */
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typedef void WriteHandlerFunc(ReadWriteHandler *, pcibus_t addr,
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uint32_t value, int len);
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typedef uint32_t ReadHandlerFunc(ReadWriteHandler *, pcibus_t addr, int len);
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struct ReadWriteHandler {
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WriteHandlerFunc *write;
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ReadHandlerFunc *read;
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};
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/* Helpers for when we want to use a single routine with length. */
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/* CPU memory handler: both read and write must be present. */
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int cpu_register_io_memory_simple(ReadWriteHandler *);
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/* io port handler: can supply only read or write handlers. */
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int register_ioport_simple(ReadWriteHandler *,
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pio_addr_t start, int length, int size);
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#endif
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