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/*
* Declarations for functions which are internal to the memory subsystem.
*
* Copyright 2011 Red Hat, Inc. and/or its affiliates
*
* Authors:
* Avi Kivity <avi@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*
*/
/*
* This header is for use by exec.c, memory.c and accel/tcg/cputlb.c ONLY,
* for declarations which are shared between the memory subsystem's
* internals and the TCG TLB code. Do not include it from elsewhere.
*/
#ifndef MEMORY_INTERNAL_H
#define MEMORY_INTERNAL_H
#ifndef CONFIG_USER_ONLY
static inline AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv)
{
return fv->dispatch;
}
static inline AddressSpaceDispatch *address_space_to_dispatch(AddressSpace *as)
{
return flatview_to_dispatch(address_space_to_flatview(as));
}
extern const MemoryRegionOps unassigned_mem_ops;
bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr,
unsigned size, bool is_write);
void flatview_add_to_dispatch(FlatView *fv, MemoryRegionSection *section);
AddressSpaceDispatch *address_space_dispatch_new(FlatView *fv);
void address_space_dispatch_compact(AddressSpaceDispatch *d);
void address_space_dispatch_free(AddressSpaceDispatch *d);
void mtree_print_dispatch(fprintf_function mon, void *f,
struct AddressSpaceDispatch *d,
MemoryRegion *root);
/* Opaque struct for passing info from memory_notdirty_write_prepare()
* to memory_notdirty_write_complete(). Callers should treat all fields
* as private, with the exception of @active.
*
* @active is a field which is not touched by either the prepare or
* complete functions, but which the caller can use if it wishes to
* track whether it has called prepare for this struct and so needs
* to later call the complete function.
*/
typedef struct {
CPUState *cpu;
ram_addr_t ram_addr;
vaddr mem_vaddr;
unsigned size;
bool locked;
bool active;
} NotDirtyInfo;
/**
* memory_notdirty_write_prepare: call before writing to non-dirty memory
* @ndi: pointer to opaque NotDirtyInfo struct
* @cpu: CPU doing the write
* @mem_vaddr: virtual address of write
* @ram_addr: the ram address of the write
* @size: size of write in bytes
*
* Any code which writes to the host memory corresponding to
* guest RAM which has been marked as NOTDIRTY must wrap those
* writes in calls to memory_notdirty_write_prepare() and
* memory_notdirty_write_complete():
*
* NotDirtyInfo ndi;
* memory_notdirty_write_prepare(&ndi, ....);
* ... perform write here ...
* memory_notdirty_write_complete(&ndi);
*
* These calls will ensure that we flush any TCG translated code for
* the memory being written, update the dirty bits and (if possible)
* remove the slowpath callback for writing to the memory.
*
* This must only be called if we are using TCG; it will assert otherwise.
*
* We may take a lock in the prepare call, so callers must ensure that
* they don't exit (via longjump or otherwise) without calling complete.
*
* This call must only be made inside an RCU critical section.
* (Note that while we're executing a TCG TB we're always in an
* RCU critical section, which is likely to be the case for callers
* of these functions.)
*/
void memory_notdirty_write_prepare(NotDirtyInfo *ndi,
CPUState *cpu,
vaddr mem_vaddr,
ram_addr_t ram_addr,
unsigned size);
/**
* memory_notdirty_write_complete: finish write to non-dirty memory
* @ndi: pointer to the opaque NotDirtyInfo struct which was initialized
* by memory_not_dirty_write_prepare().
*/
void memory_notdirty_write_complete(NotDirtyInfo *ndi);
#endif
#endif
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