static int load_dtb(target_phys_addr_t addr, const struct arm_boot_info *binfo) { #ifdef CONFIG_FDT uint32_t *mem_reg_property; uint32_t mem_reg_propsize; void *fdt = NULL; char *filename; int size, rc; uint32_t acells, scells, hival; filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, binfo->dtb_filename); if (!filename) { fprintf(stderr, "Couldn't open dtb file %s\n", binfo->dtb_filename); return -1; } fdt = load_device_tree(filename, &size); if (!fdt) { fprintf(stderr, "Couldn't open dtb file %s\n", filename); g_free(filename); return -1; } g_free(filename); acells = qemu_devtree_getprop_cell(fdt, "/", "#address-cells"); scells = qemu_devtree_getprop_cell(fdt, "/", "#size-cells"); if (acells == 0 || scells == 0) { fprintf(stderr, "dtb file invalid (#address-cells or #size-cells 0)\n"); return -1; } mem_reg_propsize = acells + scells; mem_reg_property = g_new0(uint32_t, mem_reg_propsize); mem_reg_property[acells - 1] = cpu_to_be32(binfo->loader_start); hival = cpu_to_be32(binfo->loader_start >> 32); if (acells > 1) { mem_reg_property[acells - 2] = hival; } else if (hival != 0) { fprintf(stderr, "qemu: dtb file not compatible with " "RAM start address > 4GB\n"); exit(1); } mem_reg_property[acells + scells - 1] = cpu_to_be32(binfo->ram_size); hival = cpu_to_be32(binfo->ram_size >> 32); if (scells > 1) { mem_reg_property[acells + scells - 2] = hival; } else if (hival != 0) { fprintf(stderr, "qemu: dtb file not compatible with " "RAM size > 4GB\n"); exit(1); } rc = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property, mem_reg_propsize * sizeof(uint32_t)); if (rc < 0) { fprintf(stderr, "couldn't set /memory/reg\n"); } if (binfo->kernel_cmdline && *binfo->kernel_cmdline) { rc = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", binfo->kernel_cmdline); if (rc < 0) { fprintf(stderr, "couldn't set /chosen/bootargs\n"); } } if (binfo->initrd_size) { rc = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start", binfo->loader_start + INITRD_LOAD_ADDR); if (rc < 0) { fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n"); } rc = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end", binfo->loader_start + INITRD_LOAD_ADDR + binfo->initrd_size); if (rc < 0) { fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n"); } } cpu_physical_memory_write(addr, fdt, size); return 0; #else fprintf(stderr, "Device tree requested, " "but qemu was compiled without fdt support\n"); return -1; #endif }