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 #define VGA_DIRTY_FLAG       0x01
  44 #define CODE_DIRTY_FLAG      0x02
  45 #define MIGRATION_DIRTY_FLAG 0x08
  46
  47 static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
  48                                                       int dirty_flag)
  49 {
  50     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] & dirty_flag;
  51 }
  52
  53 /* read dirty bit (return 0 or 1) */
  54 static inline bool cpu_physical_memory_is_dirty(ram_addr_t addr)
  55 {
  56     bool vga = cpu_physical_memory_get_dirty_flag(addr, VGA_DIRTY_FLAG);
  57     bool code = cpu_physical_memory_get_dirty_flag(addr, CODE_DIRTY_FLAG);
  58     bool migration =
  59         cpu_physical_memory_get_dirty_flag(addr, MIGRATION_DIRTY_FLAG);
  60     return vga && code && migration;
  61 }
  62
  63 static inline int cpu_physical_memory_get_dirty(ram_addr_t start,
  64                                                 ram_addr_t length,
  65                                                 int dirty_flag)
  66 {
  67     int ret = 0;
  68     ram_addr_t addr, end;
  69
  70     end = TARGET_PAGE_ALIGN(start + length);
  71     start &= TARGET_PAGE_MASK;
  72     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
  73         ret |= cpu_physical_memory_get_dirty_flag(addr, dirty_flag);
  74     }
  75     return ret;
  76 }
  77
  78 static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
  79                                                       int dirty_flag)
  80 {
  81     ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flag;
  82 }
  83
  84 static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
  85 {
  86     cpu_physical_memory_set_dirty_flag(addr, MIGRATION_DIRTY_FLAG);
  87     cpu_physical_memory_set_dirty_flag(addr, VGA_DIRTY_FLAG);
  88     cpu_physical_memory_set_dirty_flag(addr, CODE_DIRTY_FLAG);
  89 }
  90
  91 static inline int cpu_physical_memory_clear_dirty_flags(ram_addr_t addr,
  92                                                         int dirty_flags)
  93 {
  94     int mask = ~dirty_flags;
  95
  96     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] &= mask;
  97 }
  98
  99 static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
 100                                                        ram_addr_t length)
 101 {
 102     ram_addr_t addr, end;
 103
 104     end = TARGET_PAGE_ALIGN(start + length);
 105     start &= TARGET_PAGE_MASK;
 106     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 107         cpu_physical_memory_set_dirty(addr);
 108     }
 109     xen_modified_memory(addr, length);
 110 }
 111
 112 static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,
 113                                                         ram_addr_t length,
 114                                                         int dirty_flags)
 115 {
 116     ram_addr_t addr, end;
 117
 118     end = TARGET_PAGE_ALIGN(start + length);
 119     start &= TARGET_PAGE_MASK;
 120     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 121         cpu_physical_memory_clear_dirty_flags(addr, dirty_flags);
 122     }
 123 }
 124
 125 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
 126                                      int dirty_flags);
 127
 128 #endif
 129
 130 #endif