include/exec/memory-internal.h

   1 /*
   2  * Declarations for obsolete exec.c functions
   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 and memory.c ONLY.  Do not include it.
  16  * The functions declared here will be removed soon.
  17  */
  18
  19 #ifndef MEMORY_INTERNAL_H
  20 #define MEMORY_INTERNAL_H
  21
  22 #ifndef CONFIG_USER_ONLY
  23 #include "hw/xen/xen.h"
  24
  25
  26 typedef struct AddressSpaceDispatch AddressSpaceDispatch;
  27
  28 void address_space_init_dispatch(AddressSpace *as);
  29 void address_space_destroy_dispatch(AddressSpace *as);
  30
  31 extern const MemoryRegionOps unassigned_mem_ops;
  32
  33 bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr,
  34                                 unsigned size, bool is_write);
  35
  36 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
  37                                    MemoryRegion *mr);
  38 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
  39 void *qemu_get_ram_ptr(ram_addr_t addr);
  40 void qemu_ram_free(ram_addr_t addr);
  41 void qemu_ram_free_from_ptr(ram_addr_t addr);
  42
  43 static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
  44                                                  ram_addr_t length,
  45                                                  unsigned client)
  46 {
  47     unsigned long end, page, next;
  48
  49     assert(client < DIRTY_MEMORY_NUM);
  50
  51     end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
  52     page = start >> TARGET_PAGE_BITS;
  53     next = find_next_bit(ram_list.dirty_memory[client], end, page);
  54
  55     return next < end;
  56 }
  57
  58 static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
  59                                                       unsigned client)
  60 {
  61     return cpu_physical_memory_get_dirty(addr, 1, client);
  62 }
  63
  64 /* read dirty bit (return 0 or 1) */
  65 static inline bool cpu_physical_memory_is_dirty(ram_addr_t addr)
  66 {
  67     bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
  68     bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
  69     bool migration =
  70         cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
  71     return vga && code && migration;
  72 }
  73
  74 static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
  75                                                       unsigned client)
  76 {
  77     assert(client < DIRTY_MEMORY_NUM);
  78     set_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
  79 }
  80
  81 static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
  82                                                        ram_addr_t length)
  83 {
  84     unsigned long end, page;
  85
  86     end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
  87     page = start >> TARGET_PAGE_BITS;
  88     bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
  89     bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
  90     bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
  91     xen_modified_memory(start, length);
  92 }
  93
  94 static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
  95                                                          ram_addr_t length,
  96                                                          unsigned client)
  97 {
  98     unsigned long end, page;
  99
 100     assert(client < DIRTY_MEMORY_NUM);
 101     end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
 102     page = start >> TARGET_PAGE_BITS;
 103     bitmap_clear(ram_list.dirty_memory[client], page, end - page);
 104 }
 105
 106 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
 107                                      unsigned client);
 108
 109 #endif
 110
 111 #endif