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2068 static BounceBuffer bounce;
2142             if (done || bounce.buffer) {
2145             bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE);
2146             bounce.addr = addr;
2147             bounce.len = l;
2149                 cpu_physical_memory_read(addr, bounce.buffer, l);
2151             ptr = bounce.buffer;
2177     if (buffer != bounce.buffer) {
2193         cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len);
2195     qemu_vfree(bounce.buffer);
2196     bounce.buffer = NULL;