// SPDX-License-Identifier: GPL-2.0+ /* * Bootmethod for booting via a U-Boot script * * Copyright 2021 Google LLC * Written by Simon Glass */ #define LOG_CATEGORY UCLASS_BOOTSTD #include #include #include #include #include #include #include #include #include #include #include #include #define SCRIPT_FNAME1 "boot.scr.uimg" #define SCRIPT_FNAME2 "boot.scr" static int script_check(struct udevice *dev, struct bootflow_iter *iter) { /* This works on block devices, network devices and SPI Flash */ if (iter->method_flags & BOOTFLOW_METHF_PXE_ONLY) return log_msg_ret("pxe", -ENOTSUPP); return 0; } /** * script_fill_info() - Decode the U-Boot script to find out distro info * * @bflow: Bootflow to process * @return 0 if OK, -ve on error */ static int script_fill_info(struct bootflow *bflow) { char *name = NULL; char *data; uint len; int ret; log_debug("parsing bflow file size %x\n", bflow->size); ret = image_locate_script(bflow->buf, bflow->size, NULL, NULL, &data, &len); if (!ret) { if (strstr(data, "armbianEnv")) name = "Armbian"; } if (name) { bflow->os_name = strdup(name); if (!bflow->os_name) return log_msg_ret("os", -ENOMEM); } return 0; } static int script_read_bootflow_file(struct udevice *bootstd, struct bootflow *bflow) { struct blk_desc *desc = NULL; const char *const *prefixes; const char *prefix; int ret, i; ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd); if (ret) return log_msg_ret("std", ret); if (bflow->blk) { /* We require a partition table */ if (!bflow->part) return -ENOENT; desc = dev_get_uclass_plat(bflow->blk); } prefixes = bootstd_get_prefixes(bootstd); i = 0; do { prefix = prefixes ? prefixes[i] : NULL; ret = bootmeth_try_file(bflow, desc, prefix, SCRIPT_FNAME1); if (ret) ret = bootmeth_try_file(bflow, desc, prefix, SCRIPT_FNAME2); } while (ret && prefixes && prefixes[++i]); if (ret) return log_msg_ret("try", ret); bflow->subdir = strdup(prefix ? prefix : ""); if (!bflow->subdir) return log_msg_ret("prefix", -ENOMEM); ret = bootmeth_alloc_file(bflow, 0x10000, ARCH_DMA_MINALIGN); if (ret) return log_msg_ret("read", ret); ret = script_fill_info(bflow); if (ret) return log_msg_ret("inf", ret); ret = bootmeth_alloc_other(bflow, "boot.bmp", &bflow->logo, &bflow->logo_size); /* ignore error */ return 0; } static int script_read_bootflow_net(struct bootflow *bflow) { const char *addr_str; int size, ret; char *fname; ulong addr; /* figure out the load address */ addr_str = env_get("scriptaddr"); addr = addr_str ? hextoul(addr_str, NULL) : image_load_addr; fname = env_get("boot_script_dhcp"); if (!fname) return log_msg_ret("dhc", -EINVAL); ret = dhcp_run(addr, fname, true); if (ret) return log_msg_ret("dhc", ret); size = env_get_hex("filesize", 0); if (!size) return log_msg_ret("sz", -EINVAL); bflow->buf = malloc(size + 1); if (!bflow->buf) return log_msg_ret("buf", -ENOMEM); memcpy(bflow->buf, map_sysmem(addr, size), size); bflow->buf[size] = '\0'; bflow->size = size; bflow->state = BOOTFLOWST_READY; return 0; } static int script_read_bootflow(struct udevice *dev, struct bootflow *bflow) { const struct udevice *media = dev_get_parent(bflow->dev); struct udevice *bootstd; int ret; ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd); if (ret) return log_msg_ret("std", ret); if (IS_ENABLED(CONFIG_CMD_DHCP) && device_get_uclass_id(media) == UCLASS_ETH) { /* we only support reading from one device, so ignore 'dev' */ ret = script_read_bootflow_net(bflow); if (ret) return log_msg_ret("net", ret); } else { ret = script_read_bootflow_file(bootstd, bflow); if (ret) return log_msg_ret("blk", ret); } return 0; } static int script_set_bootflow(struct udevice *dev, struct bootflow *bflow, char *buf, int size) { buf[size] = '\0'; bflow->buf = buf; bflow->size = size; bflow->state = BOOTFLOWST_READY; return 0; } static int script_boot(struct udevice *dev, struct bootflow *bflow) { struct blk_desc *desc = dev_get_uclass_plat(bflow->blk); ulong addr; int ret; if (desc->uclass_id == UCLASS_USB) ret = env_set("devtype", "usb"); else ret = env_set("devtype", blk_get_devtype(bflow->blk)); if (!ret) ret = env_set_hex("devnum", desc->devnum); if (!ret) ret = env_set_hex("distro_bootpart", bflow->part); if (!ret) ret = env_set("prefix", bflow->subdir); if (!ret && IS_ENABLED(CONFIG_ARCH_SUNXI) && !strcmp("mmc", blk_get_devtype(bflow->blk))) ret = env_set_hex("mmc_bootdev", desc->devnum); if (ret) return log_msg_ret("env", ret); log_debug("devtype: %s\n", env_get("devtype")); log_debug("devnum: %s\n", env_get("devnum")); log_debug("distro_bootpart: %s\n", env_get("distro_bootpart")); log_debug("prefix: %s\n", env_get("prefix")); log_debug("mmc_bootdev: %s\n", env_get("mmc_bootdev")); addr = map_to_sysmem(bflow->buf); ret = cmd_source_script(addr, NULL, NULL); if (ret) return log_msg_ret("boot", ret); return 0; } static int script_bootmeth_bind(struct udevice *dev) { struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev); plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ? "Script boot from a block device" : "script"; return 0; } static struct bootmeth_ops script_bootmeth_ops = { .check = script_check, .read_bootflow = script_read_bootflow, .set_bootflow = script_set_bootflow, .read_file = bootmeth_common_read_file, .boot = script_boot, }; static const struct udevice_id script_bootmeth_ids[] = { { .compatible = "u-boot,script" }, { } }; /* Put an number before 'script' to provide a default ordering */ U_BOOT_DRIVER(bootmeth_2script) = { .name = "bootmeth_script", .id = UCLASS_BOOTMETH, .of_match = script_bootmeth_ids, .ops = &script_bootmeth_ops, .bind = script_bootmeth_bind, };