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Introduce PortioList

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Add a type and methods for manipulating a list of disjoint I/O ports,
used in some older hardware devices.

Based on original patch by Richard Henderson.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2011-09-26 14:52:26 +03:00
parent ebf47c24b0
commit 6bf9fd43cf
5 changed files with 135 additions and 6 deletions
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8
memory.c
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@ -403,12 +403,12 @@ static void memory_region_iorange_read(IORange *iorange,
*data = ((uint64_t)1 << (width * 8)) - 1;
if (mrp) {
*data = mrp->read(mr->opaque, offset);
*data = mrp->read(mr->opaque, offset + mr->offset);
}
return;
}
*data = 0;
access_with_adjusted_size(offset, data, width,
access_with_adjusted_size(offset + mr->offset, data, width,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_read_accessor, mr);
@ -425,11 +425,11 @@ static void memory_region_iorange_write(IORange *iorange,
const MemoryRegionPortio *mrp = find_portio(mr, offset, width, true);
if (mrp) {
mrp->write(mr->opaque, offset, data);
mrp->write(mr->opaque, offset + mr->offset, data);
}
return;
}
access_with_adjusted_size(offset, &data, width,
access_with_adjusted_size(offset + mr->offset, &data, width,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_write_accessor, mr);