cpu-common.h

   1 #ifndef CPU_COMMON_H
   2 #define CPU_COMMON_H 1
   3
   4 /* CPU interfaces that are target indpendent.  */
   5
   6 #ifdef TARGET_PHYS_ADDR_BITS
   7 #include "targphys.h"
   8 #endif
   9
  10 #ifndef NEED_CPU_H
  11 #include "poison.h"
  12 #endif
  13
  14 #include "bswap.h"
  15 #include "qemu-queue.h"
  16
  17 #if !defined(CONFIG_USER_ONLY)
  18
  19 enum device_endian {
  20     DEVICE_NATIVE_ENDIAN,
  21     DEVICE_BIG_ENDIAN,
  22     DEVICE_LITTLE_ENDIAN,
  23 };
  24
  25 /* address in the RAM (different from a physical address) */
  26 #if defined(CONFIG_XEN_BACKEND) && TARGET_PHYS_ADDR_BITS == 64
  27 typedef uint64_t ram_addr_t;
  28 #  define RAM_ADDR_MAX UINT64_MAX
  29 #  define RAM_ADDR_FMT "%" PRIx64
  30 #else
  31 typedef unsigned long ram_addr_t;
  32 #  define RAM_ADDR_MAX ULONG_MAX
  33 #  define RAM_ADDR_FMT "%lx"
  34 #endif
  35
  36 /* memory API */
  37
  38 typedef void CPUWriteMemoryFunc(void *opaque, target_phys_addr_t addr, uint32_t value);
  39 typedef uint32_t CPUReadMemoryFunc(void *opaque, target_phys_addr_t addr);
  40
  41 void cpu_register_physical_memory_log(target_phys_addr_t start_addr,
  42                                       ram_addr_t size,
  43                                       ram_addr_t phys_offset,
  44                                       ram_addr_t region_offset,
  45                                       bool log_dirty);
  46
  47 static inline void cpu_register_physical_memory_offset(target_phys_addr_t start_addr,
  48                                                        ram_addr_t size,
  49                                                        ram_addr_t phys_offset,
  50                                                        ram_addr_t region_offset)
  51 {
  52     cpu_register_physical_memory_log(start_addr, size, phys_offset,
  53                                      region_offset, false);
  54 }
  55
  56 static inline void cpu_register_physical_memory(target_phys_addr_t start_addr,
  57                                                 ram_addr_t size,
  58                                                 ram_addr_t phys_offset)
  59 {
  60     cpu_register_physical_memory_offset(start_addr, size, phys_offset, 0);
  61 }
  62
  63 ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr);
  64 ram_addr_t qemu_ram_alloc_from_ptr(DeviceState *dev, const char *name,
  65                         ram_addr_t size, void *host);
  66 ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size);
  67 void qemu_ram_free(ram_addr_t addr);
  68 void qemu_ram_free_from_ptr(ram_addr_t addr);
  69 void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);
  70 /* This should only be used for ram local to a device.  */
  71 void *qemu_get_ram_ptr(ram_addr_t addr);
  72 void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size);
  73 /* Same but slower, to use for migration, where the order of
  74  * RAMBlocks must not change. */
  75 void *qemu_safe_ram_ptr(ram_addr_t addr);
  76 void qemu_put_ram_ptr(void *addr);
  77 /* This should not be used by devices.  */
  78 int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr);
  79 ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr);
  80
  81 int cpu_register_io_memory(CPUReadMemoryFunc * const *mem_read,
  82                            CPUWriteMemoryFunc * const *mem_write,
  83                            void *opaque, enum device_endian endian);
  84 void cpu_unregister_io_memory(int table_address);
  85
  86 void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
  87                             int len, int is_write);
  88 static inline void cpu_physical_memory_read(target_phys_addr_t addr,
  89                                             void *buf, int len)
  90 {
  91     cpu_physical_memory_rw(addr, buf, len, 0);
  92 }
  93 static inline void cpu_physical_memory_write(target_phys_addr_t addr,
  94                                              const void *buf, int len)
  95 {
  96     cpu_physical_memory_rw(addr, (void *)buf, len, 1);
  97 }
  98 void *cpu_physical_memory_map(target_phys_addr_t addr,
  99                               target_phys_addr_t *plen,
 100                               int is_write);
 101 void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len,
 102                                int is_write, target_phys_addr_t access_len);
 103 void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque));
 104 void cpu_unregister_map_client(void *cookie);
 105
 106 struct CPUPhysMemoryClient;
 107 typedef struct CPUPhysMemoryClient CPUPhysMemoryClient;
 108 struct CPUPhysMemoryClient {
 109     void (*set_memory)(struct CPUPhysMemoryClient *client,
 110                        target_phys_addr_t start_addr,
 111                        ram_addr_t size,
 112                        ram_addr_t phys_offset,
 113                        bool log_dirty);
 114     int (*sync_dirty_bitmap)(struct CPUPhysMemoryClient *client,
 115                              target_phys_addr_t start_addr,
 116                              target_phys_addr_t end_addr);
 117     int (*migration_log)(struct CPUPhysMemoryClient *client,
 118                          int enable);
 119     int (*log_start)(struct CPUPhysMemoryClient *client,
 120                      target_phys_addr_t phys_addr, ram_addr_t size);
 121     int (*log_stop)(struct CPUPhysMemoryClient *client,
 122                     target_phys_addr_t phys_addr, ram_addr_t size);
 123     QLIST_ENTRY(CPUPhysMemoryClient) list;
 124 };
 125
 126 void cpu_register_phys_memory_client(CPUPhysMemoryClient *);
 127 void cpu_unregister_phys_memory_client(CPUPhysMemoryClient *);
 128
 129 /* Coalesced MMIO regions are areas where write operations can be reordered.
 130  * This usually implies that write operations are side-effect free.  This allows
 131  * batching which can make a major impact on performance when using
 132  * virtualization.
 133  */
 134 void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
 135
 136 void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
 137
 138 void qemu_flush_coalesced_mmio_buffer(void);
 139
 140 uint32_t ldub_phys(target_phys_addr_t addr);
 141 uint32_t lduw_le_phys(target_phys_addr_t addr);
 142 uint32_t lduw_be_phys(target_phys_addr_t addr);
 143 uint32_t ldl_le_phys(target_phys_addr_t addr);
 144 uint32_t ldl_be_phys(target_phys_addr_t addr);
 145 uint64_t ldq_le_phys(target_phys_addr_t addr);
 146 uint64_t ldq_be_phys(target_phys_addr_t addr);
 147 void stb_phys(target_phys_addr_t addr, uint32_t val);
 148 void stw_le_phys(target_phys_addr_t addr, uint32_t val);
 149 void stw_be_phys(target_phys_addr_t addr, uint32_t val);
 150 void stl_le_phys(target_phys_addr_t addr, uint32_t val);
 151 void stl_be_phys(target_phys_addr_t addr, uint32_t val);
 152 void stq_le_phys(target_phys_addr_t addr, uint64_t val);
 153 void stq_be_phys(target_phys_addr_t addr, uint64_t val);
 154
 155 #ifdef NEED_CPU_H
 156 uint32_t lduw_phys(target_phys_addr_t addr);
 157 uint32_t ldl_phys(target_phys_addr_t addr);
 158 uint64_t ldq_phys(target_phys_addr_t addr);
 159 void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val);
 160 void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val);
 161 void stw_phys(target_phys_addr_t addr, uint32_t val);
 162 void stl_phys(target_phys_addr_t addr, uint32_t val);
 163 void stq_phys(target_phys_addr_t addr, uint64_t val);
 164 #endif
 165
 166 void cpu_physical_memory_write_rom(target_phys_addr_t addr,
 167                                    const uint8_t *buf, int len);
 168
 169 #define IO_MEM_SHIFT       3
 170
 171 #define IO_MEM_RAM         (0 << IO_MEM_SHIFT) /* hardcoded offset */
 172 #define IO_MEM_ROM         (1 << IO_MEM_SHIFT) /* hardcoded offset */
 173 #define IO_MEM_UNASSIGNED  (2 << IO_MEM_SHIFT)
 174 #define IO_MEM_NOTDIRTY    (3 << IO_MEM_SHIFT)
 175
 176 /* Acts like a ROM when read and like a device when written.  */
 177 #define IO_MEM_ROMD        (1)
 178 #define IO_MEM_SUBPAGE     (2)
 179
 180 #endif
 181
 182 #endif /* !CPU_COMMON_H */