extern const char *mem_path;
extern int mem_prealloc;
-/* physical memory access */
-
-/* MMIO pages are identified by a combination of an IO device index and
- 3 flags. The ROMD code stores the page ram offset in iotlb entry,
- so only a limited number of ids are avaiable. */
-
-#define IO_MEM_NB_ENTRIES (1 << TARGET_PAGE_BITS)
-
/* Flags stored in the low bits of the TLB virtual address. These are
defined so that fast path ram access is all zeros. */
/* Zero if TLB entry is valid. */
static void io_mem_init(void);
static void memory_map_init(void);
-/* io memory support */
-MemoryRegion *io_mem_region[IO_MEM_NB_ENTRIES];
-static char io_mem_used[IO_MEM_NB_ENTRIES];
static MemoryRegion io_mem_watch;
#endif
return mmio;
}
-static int get_free_io_mem_idx(void)
-{
- int i;
-
- for (i = 0; i<IO_MEM_NB_ENTRIES; i++)
- if (!io_mem_used[i]) {
- io_mem_used[i] = 1;
- return i;
- }
- fprintf(stderr, "RAN out out io_mem_idx, max %d !\n", IO_MEM_NB_ENTRIES);
- return -1;
-}
-
-/* mem_read and mem_write are arrays of functions containing the
- function to access byte (index 0), word (index 1) and dword (index
- 2). Functions can be omitted with a NULL function pointer.
- If io_index is non zero, the corresponding io zone is
- modified. If it is zero, a new io zone is allocated. The return
- value can be used with cpu_register_physical_memory(). (-1) is
- returned if error. */
-static int cpu_register_io_memory_fixed(int io_index, MemoryRegion *mr)
-{
- if (io_index <= 0) {
- io_index = get_free_io_mem_idx();
- if (io_index == -1)
- return io_index;
- } else {
- if (io_index >= IO_MEM_NB_ENTRIES)
- return -1;
- }
-
- io_mem_region[io_index] = mr;
-
- return io_index;
-}
-
-int cpu_register_io_memory(MemoryRegion *mr)
-{
- return cpu_register_io_memory_fixed(0, mr);
-}
-
-void cpu_unregister_io_memory(int io_index)
-{
- io_mem_region[io_index] = NULL;
- io_mem_used[io_index] = 0;
-}
-
static uint16_t dummy_section(MemoryRegion *mr)
{
MemoryRegionSection section = {
static void io_mem_init(void)
{
- int i;
-
- /* Must be first: */
memory_region_init_io(&io_mem_ram, &error_mem_ops, NULL, "ram", UINT64_MAX);
- assert(io_mem_ram.ram_addr == 0);
memory_region_init_io(&io_mem_rom, &rom_mem_ops, NULL, "rom", UINT64_MAX);
memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL,
"unassigned", UINT64_MAX);
"notdirty", UINT64_MAX);
memory_region_init_io(&io_mem_subpage_ram, &subpage_ram_ops, NULL,
"subpage-ram", UINT64_MAX);
- for (i=0; i<5; i++)
- io_mem_used[i] = 1;
-
memory_region_init_io(&io_mem_watch, &watch_mem_ops, NULL,
"watch", UINT64_MAX);
}
static void memory_region_destructor_iomem(MemoryRegion *mr)
{
- cpu_unregister_io_memory(mr->ram_addr);
}
static void memory_region_destructor_rom_device(MemoryRegion *mr)
{
qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
- cpu_unregister_io_memory(mr->ram_addr & ~TARGET_PAGE_MASK);
}
static bool memory_region_wrong_endianness(MemoryRegion *mr)
mr->opaque = opaque;
mr->terminates = true;
mr->destructor = memory_region_destructor_iomem;
- mr->ram_addr = cpu_register_io_memory(mr);
+ mr->ram_addr = ~(ram_addr_t)0;
}
void memory_region_init_ram(MemoryRegion *mr,
mr->rom_device = true;
mr->destructor = memory_region_destructor_rom_device;
mr->ram_addr = qemu_ram_alloc(size, mr);
- mr->ram_addr |= cpu_register_io_memory(mr);
}
static uint64_t invalid_read(void *opaque, target_phys_addr_t addr,