void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf, int len, int is_write) { int l, io_index; uint8_t *ptr; uint32_t val; target_phys_addr_t page; unsigned long pd; PhysPageDesc *p; while (len > 0) { page = addr & TARGET_PAGE_MASK; l = (page + TARGET_PAGE_SIZE) - addr; if (l > len) l = len; p = phys_page_find(page >> TARGET_PAGE_BITS); if (!p) { pd = IO_MEM_UNASSIGNED; } else { pd = p->phys_offset; } if (is_write) { if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) { io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1); if (p) addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; /* XXX: could force cpu_single_env to NULL to avoid potential bugs */ if (l >= 4 && ((addr & 3) == 0)) { /* 32 bit write access */ val = ldl_p(buf); io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val); l = 4; } else if (l >= 2 && ((addr & 1) == 0)) { /* 16 bit write access */ val = lduw_p(buf); io_mem_write[io_index][1](io_mem_opaque[io_index], addr, val); l = 2; } else { /* 8 bit write access */ val = ldub_p(buf); io_mem_write[io_index][0](io_mem_opaque[io_index], addr, val); l = 1; } } else { unsigned long addr1; addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); /* RAM case */ ptr = phys_ram_base + addr1; memcpy(ptr, buf, l); if (!cpu_physical_memory_is_dirty(addr1)) { /* invalidate code */ tb_invalidate_phys_page_range(addr1, addr1 + l, 0); /* set dirty bit */ phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= (0xff & ~CODE_DIRTY_FLAG); } } } else { if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) { /* I/O case */ io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1); if (p) addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; if (l >= 4 && ((addr & 3) == 0)) { /* 32 bit read access */ val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr); stl_p(buf, val); l = 4; } else if (l >= 2 && ((addr & 1) == 0)) { /* 16 bit read access */ val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr); stw_p(buf, val); l = 2; } else { /* 8 bit read access */ val = io_mem_read[io_index][0](io_mem_opaque[io_index], addr); stb_p(buf, val); l = 1; } } else { /* RAM case */ ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); memcpy(buf, ptr, l); } } len -= l; buf += l; addr += l; } }