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 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
  26                                    MemoryRegion *mr);
  27 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
  28 void qemu_ram_free(ram_addr_t addr);
  29 void qemu_ram_free_from_ptr(ram_addr_t addr);
  30
  31 struct MemoryRegion;
  32 struct MemoryRegionSection;
  33 void cpu_register_physical_memory_log(struct MemoryRegionSection *section,
  34                                       bool readonly);
  35
  36 void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
  37 void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
  38
  39 int cpu_physical_memory_set_dirty_tracking(int enable);
  40
  41 #define VGA_DIRTY_FLAG       0x01
  42 #define CODE_DIRTY_FLAG      0x02
  43 #define MIGRATION_DIRTY_FLAG 0x08
  44
  45 static inline int cpu_physical_memory_get_dirty_flags(ram_addr_t addr)
  46 {
  47     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS];
  48 }
  49
  50 /* read dirty bit (return 0 or 1) */
  51 static inline int cpu_physical_memory_is_dirty(ram_addr_t addr)
  52 {
  53     return cpu_physical_memory_get_dirty_flags(addr) == 0xff;
  54 }
  55
  56 static inline int cpu_physical_memory_get_dirty(ram_addr_t start,
  57                                                 ram_addr_t length,
  58                                                 int dirty_flags)
  59 {
  60     int ret = 0;
  61     ram_addr_t addr, end;
  62
  63     end = TARGET_PAGE_ALIGN(start + length);
  64     start &= TARGET_PAGE_MASK;
  65     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
  66         ret |= cpu_physical_memory_get_dirty_flags(addr) & dirty_flags;
  67     }
  68     return ret;
  69 }
  70
  71 static inline int cpu_physical_memory_set_dirty_flags(ram_addr_t addr,
  72                                                       int dirty_flags)
  73 {
  74     if ((dirty_flags & MIGRATION_DIRTY_FLAG) &&
  75         !cpu_physical_memory_get_dirty(addr, TARGET_PAGE_SIZE,
  76                                        MIGRATION_DIRTY_FLAG)) {
  77         ram_list.dirty_pages++;
  78     }
  79     return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flags;
  80 }
  81
  82 static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
  83 {
  84     cpu_physical_memory_set_dirty_flags(addr, 0xff);
  85 }
  86
  87 static inline int cpu_physical_memory_clear_dirty_flags(ram_addr_t addr,
  88                                                         int dirty_flags)
  89 {
  90     int mask = ~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] &= mask;
  98 }
  99
 100 static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
 101                                                        ram_addr_t length,
 102                                                        int dirty_flags)
 103 {
 104     ram_addr_t addr, end;
 105
 106     end = TARGET_PAGE_ALIGN(start + length);
 107     start &= TARGET_PAGE_MASK;
 108     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 109         cpu_physical_memory_set_dirty_flags(addr, dirty_flags);
 110     }
 111     xen_modified_memory(addr, length);
 112 }
 113
 114 static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,
 115                                                         ram_addr_t length,
 116                                                         int dirty_flags)
 117 {
 118     ram_addr_t addr, end;
 119
 120     end = TARGET_PAGE_ALIGN(start + length);
 121     start &= TARGET_PAGE_MASK;
 122     for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
 123         cpu_physical_memory_clear_dirty_flags(addr, dirty_flags);
 124     }
 125 }
 126
 127 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
 128                                      int dirty_flags);
 129
 130 extern const IORangeOps memory_region_iorange_ops;
 131
 132 #endif
 133
 134 #endif