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.h"
  24
  25 typedef struct PhysPageEntry PhysPageEntry;
  26
  27 struct PhysPageEntry {
  28     uint16_t is_leaf : 1;
  29      /* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */
  30     uint16_t ptr : 15;
  31 };
  32
  33 typedef struct AddressSpaceDispatch AddressSpaceDispatch;
  34
  35 struct AddressSpaceDispatch {
  36     /* This is a multi-level map on the physical address space.
  37      * The bottom level has pointers to MemoryRegionSections.
  38      */
  39     PhysPageEntry phys_map;
  40     MemoryListener listener;
  41 };
  42
  43 void address_space_init_dispatch(AddressSpace *as);
  44 void address_space_destroy_dispatch(AddressSpace *as);
  45
  46 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
  47                                    MemoryRegion *mr);
  48 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
  49 void qemu_ram_free(ram_addr_t addr);
  50 void qemu_ram_free_from_ptr(ram_addr_t addr);
  51
  52 struct MemoryRegion;
  53 struct MemoryRegionSection;
  54
  55 void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
  56 void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
  57
  58 int cpu_physical_memory_set_dirty_tracking(int enable);
  59
  60 #define VGA_DIRTY_FLAG       0x01
  61 #define CODE_DIRTY_FLAG      0x02
  62 #define MIGRATION_DIRTY_FLAG 0x08
  63
  64 static inline int cpu_physical_memory_get_dirty_flags(ram_addr_t addr)
  65 {
  66     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS];
  67 }
  68
  69 /* read dirty bit (return 0 or 1) */
  70 static inline int cpu_physical_memory_is_dirty(ram_addr_t addr)
  71 {
  72     return cpu_physical_memory_get_dirty_flags(addr) == 0xff;
  73 }
  74
  75 static inline int cpu_physical_memory_get_dirty(ram_addr_t start,
  76                                                 ram_addr_t length,
  77                                                 int dirty_flags)
  78 {
  79     int ret = 0;
  80     ram_addr_t addr, end;
  81
  82     end = TARGET_PAGE_ALIGN(start + length);
  83     start &= TARGET_PAGE_MASK;
  84     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
  85         ret |= cpu_physical_memory_get_dirty_flags(addr) & dirty_flags;
  86     }
  87     return ret;
  88 }
  89
  90 static inline int cpu_physical_memory_set_dirty_flags(ram_addr_t addr,
  91                                                       int dirty_flags)
  92 {
  93     if ((dirty_flags & MIGRATION_DIRTY_FLAG) &&
  94         !cpu_physical_memory_get_dirty(addr, TARGET_PAGE_SIZE,
  95                                        MIGRATION_DIRTY_FLAG)) {
  96         ram_list.dirty_pages++;
  97     }
  98     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flags;
  99 }
 100
 101 static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
 102 {
 103     cpu_physical_memory_set_dirty_flags(addr, 0xff);
 104 }
 105
 106 static inline int cpu_physical_memory_clear_dirty_flags(ram_addr_t addr,
 107                                                         int dirty_flags)
 108 {
 109     int mask = ~dirty_flags;
 110
 111     if ((dirty_flags & MIGRATION_DIRTY_FLAG) &&
 112         cpu_physical_memory_get_dirty(addr, TARGET_PAGE_SIZE,
 113                                       MIGRATION_DIRTY_FLAG)) {
 114         ram_list.dirty_pages--;
 115     }
 116     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] &= mask;
 117 }
 118
 119 static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
 120                                                        ram_addr_t length,
 121                                                        int dirty_flags)
 122 {
 123     ram_addr_t addr, end;
 124
 125     end = TARGET_PAGE_ALIGN(start + length);
 126     start &= TARGET_PAGE_MASK;
 127     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 128         cpu_physical_memory_set_dirty_flags(addr, dirty_flags);
 129     }
 130     xen_modified_memory(addr, length);
 131 }
 132
 133 static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,
 134                                                         ram_addr_t length,
 135                                                         int dirty_flags)
 136 {
 137     ram_addr_t addr, end;
 138
 139     end = TARGET_PAGE_ALIGN(start + length);
 140     start &= TARGET_PAGE_MASK;
 141     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 142         cpu_physical_memory_clear_dirty_flags(addr, dirty_flags);
 143     }
 144 }
 145
 146 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
 147                                      int dirty_flags);
 148
 149 extern const IORangeOps memory_region_iorange_ops;
 150
 151 #endif
 152
 153 #endif