include/exec/cpu-common.h

   1 #ifndef CPU_COMMON_H
   2 #define CPU_COMMON_H
   3
   4 /* CPU interfaces that are target independent.  */
   5
   6 #ifndef CONFIG_USER_ONLY
   7 #include "exec/hwaddr.h"
   8 #endif
   9
  10 #include "qemu/bswap.h"
  11 #include "qemu/queue.h"
  12 #include "qemu/fprintf-fn.h"
  13
  14 /**
  15  * CPUListState:
  16  * @cpu_fprintf: Print function.
  17  * @file: File to print to using @cpu_fprint.
  18  *
  19  * State commonly used for iterating over CPU models.
  20  */
  21 typedef struct CPUListState {
  22     fprintf_function cpu_fprintf;
  23     FILE *file;
  24 } CPUListState;
  25
  26 /* The CPU list lock nests outside tb_lock/tb_unlock.  */
  27 void qemu_init_cpu_list(void);
  28 void cpu_list_lock(void);
  29 void cpu_list_unlock(void);
  30
  31 #if !defined(CONFIG_USER_ONLY)
  32
  33 enum device_endian {
  34     DEVICE_NATIVE_ENDIAN,
  35     DEVICE_BIG_ENDIAN,
  36     DEVICE_LITTLE_ENDIAN,
  37 };
  38
  39 #if defined(HOST_WORDS_BIGENDIAN)
  40 #define DEVICE_HOST_ENDIAN DEVICE_BIG_ENDIAN
  41 #else
  42 #define DEVICE_HOST_ENDIAN DEVICE_LITTLE_ENDIAN
  43 #endif
  44
  45 /* address in the RAM (different from a physical address) */
  46 #if defined(CONFIG_XEN_BACKEND)
  47 typedef uint64_t ram_addr_t;
  48 #  define RAM_ADDR_MAX UINT64_MAX
  49 #  define RAM_ADDR_FMT "%" PRIx64
  50 #else
  51 typedef uintptr_t ram_addr_t;
  52 #  define RAM_ADDR_MAX UINTPTR_MAX
  53 #  define RAM_ADDR_FMT "%" PRIxPTR
  54 #endif
  55
  56 extern ram_addr_t ram_size;
  57
  58 /* memory API */
  59
  60 typedef void CPUWriteMemoryFunc(void *opaque, hwaddr addr, uint32_t value);
  61 typedef uint32_t CPUReadMemoryFunc(void *opaque, hwaddr addr);
  62
  63 void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);
  64 /* This should not be used by devices.  */
  65 ram_addr_t qemu_ram_addr_from_host(void *ptr);
  66 RAMBlock *qemu_ram_block_by_name(const char *name);
  67 RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
  68                                    ram_addr_t *offset);
  69 void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev);
  70 void qemu_ram_unset_idstr(RAMBlock *block);
  71 const char *qemu_ram_get_idstr(RAMBlock *rb);
  72 bool qemu_ram_is_shared(RAMBlock *rb);
  73 size_t qemu_ram_pagesize(RAMBlock *block);
  74 size_t qemu_ram_pagesize_largest(void);
  75
  76 void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
  77                             int len, int is_write);
  78 static inline void cpu_physical_memory_read(hwaddr addr,
  79                                             void *buf, int len)
  80 {
  81     cpu_physical_memory_rw(addr, buf, len, 0);
  82 }
  83 static inline void cpu_physical_memory_write(hwaddr addr,
  84                                              const void *buf, int len)
  85 {
  86     cpu_physical_memory_rw(addr, (void *)buf, len, 1);
  87 }
  88 void *cpu_physical_memory_map(hwaddr addr,
  89                               hwaddr *plen,
  90                               int is_write);
  91 void cpu_physical_memory_unmap(void *buffer, hwaddr len,
  92                                int is_write, hwaddr access_len);
  93 void cpu_register_map_client(QEMUBH *bh);
  94 void cpu_unregister_map_client(QEMUBH *bh);
  95
  96 bool cpu_physical_memory_is_io(hwaddr phys_addr);
  97
  98 /* Coalesced MMIO regions are areas where write operations can be reordered.
  99  * This usually implies that write operations are side-effect free.  This allows
 100  * batching which can make a major impact on performance when using
 101  * virtualization.
 102  */
 103 void qemu_flush_coalesced_mmio_buffer(void);
 104
 105 void cpu_physical_memory_write_rom(AddressSpace *as, hwaddr addr,
 106                                    const uint8_t *buf, int len);
 107 void cpu_flush_icache_range(hwaddr start, int len);
 108
 109 extern struct MemoryRegion io_mem_rom;
 110 extern struct MemoryRegion io_mem_notdirty;
 111
 112 typedef int (RAMBlockIterFunc)(const char *block_name, void *host_addr,
 113     ram_addr_t offset, ram_addr_t length, void *opaque);
 114
 115 int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque);
 116 int ram_block_discard_range(RAMBlock *rb, uint64_t start, size_t length);
 117
 118 #endif
 119
 120 #endif /* CPU_COMMON_H */