acd1c812b5
The current ioport callbacks are not type-safe, in that they accept an "opaque" pointer as an argument whose type must match the argument to the registration function; this is not checked by the compiler. This patch adds an alternative that is type-safe. Instead of an opaque argument, both registation and the callback use a new IOPort type. The callback then uses container_of() to access its main structures. Currently the old and new methods exist side by side; once the old way is gone, we can also save a bunch of memory since the new method requires one pointer per ioport instead of 6. Acked-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
31 lines
663 B
C
31 lines
663 B
C
#ifndef IORANGE_H
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#define IORANGE_H
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#include <stdint.h>
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typedef struct IORange IORange;
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typedef struct IORangeOps IORangeOps;
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struct IORangeOps {
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void (*read)(IORange *iorange, uint64_t offset, unsigned width,
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uint64_t *data);
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void (*write)(IORange *iorange, uint64_t offset, unsigned width,
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uint64_t data);
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};
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struct IORange {
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const IORangeOps *ops;
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uint64_t base;
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uint64_t len;
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};
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static inline void iorange_init(IORange *iorange, const IORangeOps *ops,
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uint64_t base, uint64_t len)
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{
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iorange->ops = ops;
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iorange->base = base;
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iorange->len = len;
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}
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#endif
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