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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | // SPDX-License-Identifier: GPL-2.0+ /* * Bootmethod for booting via a U-Boot script * * Copyright 2021 Google LLC * Written by Simon Glass <sjg@chromium.org> */ #define LOG_CATEGORY UCLASS_BOOTSTD #include <common.h> #include <blk.h> #include <bootflow.h> #include <bootmeth.h> #include <bootstd.h> #include <dm.h> #include <env.h> #include <fs.h> #include <image.h> #include <malloc.h> #include <mapmem.h> #define SCRIPT_FNAME1 "boot.scr.uimg" #define SCRIPT_FNAME2 "boot.scr" static int script_check(struct udevice *dev, struct bootflow_iter *iter) { int ret; /* This only works on block devices */ ret = bootflow_iter_uses_blk_dev(iter); if (ret) return log_msg_ret("blk", ret); return 0; } static int script_read_bootflow(struct udevice *dev, struct bootflow *bflow) { struct blk_desc *desc = NULL; const char *const *prefixes; struct udevice *bootstd; const char *prefix; int ret, i; ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd); if (ret) return log_msg_ret("std", ret); /* We require a partition table */ if (!bflow->part) return -ENOENT; if (bflow->blk) 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, 1); if (ret) return log_msg_ret("read", ret); 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; ret = env_set("devtype", blk_get_devtype(bflow->blk)); if (!ret) ret = env_set_hex("devnum", desc->devnum); 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("prefix: %s\n", env_get("prefix")); log_debug("mmc_bootdev: %s\n", env_get("mmc_bootdev")); addr = map_to_sysmem(bflow->buf); ret = image_source_script(addr, 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, .read_file = bootmeth_common_read_file, .boot = script_boot, }; static const struct udevice_id script_bootmeth_ids[] = { { .compatible = "u-boot,script" }, { } }; U_BOOT_DRIVER(bootmeth_script) = { .name = "bootmeth_script", .id = UCLASS_BOOTMETH, .of_match = script_bootmeth_ids, .ops = &script_bootmeth_ops, .bind = script_bootmeth_bind, }; |