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
  45 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
  46                                    MemoryRegion *mr);
  47 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
  48 void qemu_ram_free(ram_addr_t addr);
  49 void qemu_ram_free_from_ptr(ram_addr_t addr);
  50
  51 struct MemoryRegion;
  52 struct MemoryRegionSection;
  53
  54 void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
  55 void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
  56
  57 int cpu_physical_memory_set_dirty_tracking(int enable);
  58
  59 #define VGA_DIRTY_FLAG       0x01
  60 #define CODE_DIRTY_FLAG      0x02
  61 #define MIGRATION_DIRTY_FLAG 0x08
  62
  63 static inline int cpu_physical_memory_get_dirty_flags(ram_addr_t addr)
  64 {
  65     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS];
  66 }
  67
  68 /* read dirty bit (return 0 or 1) */
  69 static inline int cpu_physical_memory_is_dirty(ram_addr_t addr)
  70 {
  71     return cpu_physical_memory_get_dirty_flags(addr) == 0xff;
  72 }
  73
  74 static inline int cpu_physical_memory_get_dirty(ram_addr_t start,
  75                                                 ram_addr_t length,
  76                                                 int dirty_flags)
  77 {
  78     int ret = 0;
  79     ram_addr_t addr, end;
  80
  81     end = TARGET_PAGE_ALIGN(start + length);
  82     start &= TARGET_PAGE_MASK;
  83     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
  84         ret |= cpu_physical_memory_get_dirty_flags(addr) & dirty_flags;
  85     }
  86     return ret;
  87 }
  88
  89 static inline int cpu_physical_memory_set_dirty_flags(ram_addr_t addr,
  90                                                       int dirty_flags)
  91 {
  92     if ((dirty_flags & MIGRATION_DIRTY_FLAG) &&
  93         !cpu_physical_memory_get_dirty(addr, TARGET_PAGE_SIZE,
  94                                        MIGRATION_DIRTY_FLAG)) {
  95         ram_list.dirty_pages++;
  96     }
  97     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flags;
  98 }
  99
 100 static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
 101 {
 102     cpu_physical_memory_set_dirty_flags(addr, 0xff);
 103 }
 104
 105 static inline int cpu_physical_memory_clear_dirty_flags(ram_addr_t addr,
 106                                                         int dirty_flags)
 107 {
 108     int mask = ~dirty_flags;
 109
 110     if ((dirty_flags & MIGRATION_DIRTY_FLAG) &&
 111         cpu_physical_memory_get_dirty(addr, TARGET_PAGE_SIZE,
 112                                       MIGRATION_DIRTY_FLAG)) {
 113         ram_list.dirty_pages--;
 114     }
 115     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] &= mask;
 116 }
 117
 118 static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
 119                                                        ram_addr_t length,
 120                                                        int dirty_flags)
 121 {
 122     ram_addr_t addr, end;
 123
 124     end = TARGET_PAGE_ALIGN(start + length);
 125     start &= TARGET_PAGE_MASK;
 126     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 127         cpu_physical_memory_set_dirty_flags(addr, dirty_flags);
 128     }
 129     xen_modified_memory(addr, length);
 130 }
 131
 132 static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,
 133                                                         ram_addr_t length,
 134                                                         int dirty_flags)
 135 {
 136     ram_addr_t addr, end;
 137
 138     end = TARGET_PAGE_ALIGN(start + length);
 139     start &= TARGET_PAGE_MASK;
 140     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 141         cpu_physical_memory_clear_dirty_flags(addr, dirty_flags);
 142     }
 143 }
 144
 145 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
 146                                      int dirty_flags);
 147
 148 extern const IORangeOps memory_region_iorange_ops;
 149
 150 #endif
 151
 152 #endif