static void nand_realize(DeviceState *dev, Error **errp) { int pagesize; NANDFlashState *s = NAND(dev); s->buswidth = nand_flash_ids[s->chip_id].width >> 3; s->size = nand_flash_ids[s->chip_id].size << 20; if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) { s->page_shift = 11; s->erase_shift = 6; } else { s->page_shift = nand_flash_ids[s->chip_id].page_shift; s->erase_shift = nand_flash_ids[s->chip_id].erase_shift; } switch (1 << s->page_shift) { case 256: nand_init_256(s); break; case 512: nand_init_512(s); break; case 2048: nand_init_2048(s); break; default: error_setg(errp, "Unsupported NAND block size %#x\n", 1 << s->page_shift); return; } pagesize = 1 << s->oob_shift; s->mem_oob = 1; if (s->bdrv) { if (bdrv_is_read_only(s->bdrv)) { error_setg(errp, "Can't use a read-only drive"); return; } if (bdrv_getlength(s->bdrv) >= (s->pages << s->page_shift) + (s->pages << s->oob_shift)) { pagesize = 0; s->mem_oob = 0; } } else { pagesize += 1 << s->page_shift; } if (pagesize) { s->storage = (uint8_t *) memset(g_malloc(s->pages * pagesize), 0xff, s->pages * pagesize); } /* Give s->ioaddr a sane value in case we save state before it is used. */ s->ioaddr = s->io; }