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memory: add backward compatibility for old mmio registration

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This eases the transition to the new API.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Avi Kivity 2011-07-26 14:26:10 +03:00 committed by Anthony Liguori
parent 627a0e90dc
commit 74901c3bd0
2 changed files with 20 additions and 0 deletions
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10
memory.c
View file

@ -14,6 +14,7 @@
#include "memory.h"
#include "exec-memory.h"
#include "ioport.h"
#include "bitops.h"
#include <assert.h>
typedef struct AddrRange AddrRange;
@ -506,6 +507,10 @@ static uint32_t memory_region_read_thunk_n(void *_mr,
return -1U; /* FIXME: better signalling */
}
if (!mr->ops->read) {
return mr->ops->old_mmio.read[bitops_ffsl(size)](mr->opaque, addr);
}
/* FIXME: support unaligned access */
access_size_min = mr->ops->impl.min_access_size;
@ -542,6 +547,11 @@ static void memory_region_write_thunk_n(void *_mr,
return; /* FIXME: better signalling */
}
if (!mr->ops->write) {
mr->ops->old_mmio.write[bitops_ffsl(size)](mr->opaque, addr, data);
return;
}
/* FIXME: support unaligned access */
access_size_min = mr->ops->impl.min_access_size;

10
memory.h
View file

@ -28,6 +28,7 @@
typedef struct MemoryRegionOps MemoryRegionOps;
typedef struct MemoryRegion MemoryRegion;
typedef struct MemoryRegionPortio MemoryRegionPortio;
typedef struct MemoryRegionMmio MemoryRegionMmio;
/* Must match *_DIRTY_FLAGS in cpu-all.h. To be replaced with dynamic
* registration.
@ -36,6 +37,11 @@ typedef struct MemoryRegionPortio MemoryRegionPortio;
#define DIRTY_MEMORY_CODE 1
#define DIRTY_MEMORY_MIGRATION 3
struct MemoryRegionMmio {
CPUReadMemoryFunc *read[3];
CPUWriteMemoryFunc *write[3];
};
/*
* Memory region callbacks
*/
@ -85,6 +91,10 @@ struct MemoryRegionOps {
* backwards compatibility with old portio registration
*/
const MemoryRegionPortio *old_portio;
/* If .read and .write are not present, old_mmio may be used for
* backwards compatibility with old mmio registration
*/
const MemoryRegionMmio old_mmio;
};
typedef struct CoalescedMemoryRange CoalescedMemoryRange;