1 /* 2 * Declarations for functions which are internal to the memory subsystem. 3 * 4 * Copyright 2011 Red Hat, Inc. and/or its affiliates 5 * 6 * Authors: 7 * Avi Kivity <avi@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or 10 * later. See the COPYING file in the top-level directory. 11 * 12 */ 13 14 /* 15 * This header is for use by exec.c, memory.c and accel/tcg/cputlb.c ONLY, 16 * for declarations which are shared between the memory subsystem's 17 * internals and the TCG TLB code. Do not include it from elsewhere. 18 */ 19 20 #ifndef MEMORY_INTERNAL_H 21 #define MEMORY_INTERNAL_H 22 23 #ifndef CONFIG_USER_ONLY 24 typedef struct AddressSpaceDispatch AddressSpaceDispatch; 25 26 extern const MemoryRegionOps unassigned_mem_ops; 27 28 bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr, 29 unsigned size, bool is_write); 30 31 void flatview_add_to_dispatch(FlatView *fv, MemoryRegionSection *section); 32 AddressSpaceDispatch *address_space_dispatch_new(FlatView *fv); 33 void address_space_dispatch_compact(AddressSpaceDispatch *d); 34 35 AddressSpaceDispatch *address_space_to_dispatch(AddressSpace *as); 36 AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv); 37 void address_space_dispatch_free(AddressSpaceDispatch *d); 38 39 void mtree_print_dispatch(fprintf_function mon, void *f, 40 struct AddressSpaceDispatch *d, 41 MemoryRegion *root); 42 43 /* Opaque struct for passing info from memory_notdirty_write_prepare() 44 * to memory_notdirty_write_complete(). Callers should treat all fields 45 * as private, with the exception of @active. 46 * 47 * @active is a field which is not touched by either the prepare or 48 * complete functions, but which the caller can use if it wishes to 49 * track whether it has called prepare for this struct and so needs 50 * to later call the complete function. 51 */ 52 typedef struct { 53 CPUState *cpu; 54 ram_addr_t ram_addr; 55 vaddr mem_vaddr; 56 unsigned size; 57 bool locked; 58 bool active; 59 } NotDirtyInfo; 60 61 /** 62 * memory_notdirty_write_prepare: call before writing to non-dirty memory 63 * @ndi: pointer to opaque NotDirtyInfo struct 64 * @cpu: CPU doing the write 65 * @mem_vaddr: virtual address of write 66 * @ram_addr: the ram address of the write 67 * @size: size of write in bytes 68 * 69 * Any code which writes to the host memory corresponding to 70 * guest RAM which has been marked as NOTDIRTY must wrap those 71 * writes in calls to memory_notdirty_write_prepare() and 72 * memory_notdirty_write_complete(): 73 * 74 * NotDirtyInfo ndi; 75 * memory_notdirty_write_prepare(&ndi, ....); 76 * ... perform write here ... 77 * memory_notdirty_write_complete(&ndi); 78 * 79 * These calls will ensure that we flush any TCG translated code for 80 * the memory being written, update the dirty bits and (if possible) 81 * remove the slowpath callback for writing to the memory. 82 * 83 * This must only be called if we are using TCG; it will assert otherwise. 84 * 85 * We may take a lock in the prepare call, so callers must ensure that 86 * they don't exit (via longjump or otherwise) without calling complete. 87 * 88 * This call must only be made inside an RCU critical section. 89 * (Note that while we're executing a TCG TB we're always in an 90 * RCU critical section, which is likely to be the case for callers 91 * of these functions.) 92 */ 93 void memory_notdirty_write_prepare(NotDirtyInfo *ndi, 94 CPUState *cpu, 95 vaddr mem_vaddr, 96 ram_addr_t ram_addr, 97 unsigned size); 98 /** 99 * memory_notdirty_write_complete: finish write to non-dirty memory 100 * @ndi: pointer to the opaque NotDirtyInfo struct which was initialized 101 * by memory_not_dirty_write_prepare(). 102 */ 103 void memory_notdirty_write_complete(NotDirtyInfo *ndi); 104 105 #endif 106 #endif 107