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@@ -627,3 +627,143 @@ U_BOOT_CMD(
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"boot Linux zImage image from memory", bootz_help_text
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);
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#endif /* CONFIG_CMD_BOOTZ */
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+
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+#ifdef CONFIG_CMD_BOOTI
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+/* See Documentation/arm64/booting.txt in the Linux kernel */
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+struct Image_header {
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+ uint32_t code0; /* Executable code */
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+ uint32_t code1; /* Executable code */
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+ uint64_t text_offset; /* Image load offset, LE */
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+ uint64_t image_size; /* Effective Image size, LE */
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+ uint64_t res1; /* reserved */
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+ uint64_t res2; /* reserved */
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+ uint64_t res3; /* reserved */
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+ uint64_t res4; /* reserved */
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+ uint32_t magic; /* Magic number */
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+ uint32_t res5;
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+};
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+
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+#define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
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+
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+static int booti_setup(bootm_headers_t *images)
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+{
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+ struct Image_header *ih;
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+ uint64_t dst;
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+
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+ ih = (struct Image_header *)map_sysmem(images->ep, 0);
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+
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+ if (ih->magic != le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC)) {
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+ puts("Bad Linux ARM64 Image magic!\n");
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+ return 1;
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+ }
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+
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+ if (ih->image_size == 0) {
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+ puts("Image lacks image_size field, assuming 16MiB\n");
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+ ih->image_size = (16 << 20);
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+ }
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+
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+ /*
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+ * If we are not at the correct run-time location, set the new
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+ * correct location and then move the image there.
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+ */
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+ dst = gd->bd->bi_dram[0].start + le32_to_cpu(ih->text_offset);
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+ if (images->ep != dst) {
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+ void *src;
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+
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+ debug("Moving Image from 0x%lx to 0x%llx\n", images->ep, dst);
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+
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+ src = (void *)images->ep;
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+ images->ep = dst;
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+ memmove((void *)dst, src, le32_to_cpu(ih->image_size));
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+ }
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+
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+ return 0;
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+}
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+
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+/*
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+ * Image booting support
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+ */
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+static int booti_start(cmd_tbl_t *cmdtp, int flag, int argc,
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+ char * const argv[], bootm_headers_t *images)
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+{
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+ int ret;
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+ struct Image_header *ih;
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+
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+ ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
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+ images, 1);
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+
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+ /* Setup Linux kernel Image entry point */
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+ if (!argc) {
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+ images->ep = load_addr;
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+ debug("* kernel: default image load address = 0x%08lx\n",
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+ load_addr);
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+ } else {
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+ images->ep = simple_strtoul(argv[0], NULL, 16);
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+ debug("* kernel: cmdline image address = 0x%08lx\n",
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+ images->ep);
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+ }
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+
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+ ret = booti_setup(images);
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+ if (ret != 0)
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+ return 1;
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+
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+ ih = (struct Image_header *)map_sysmem(images->ep, 0);
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+
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+ lmb_reserve(&images->lmb, images->ep, le32_to_cpu(ih->image_size));
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+
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+ /*
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+ * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
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+ * have a header that provide this informaiton.
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+ */
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+ if (bootm_find_ramdisk_fdt(flag, argc, argv))
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+ return 1;
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+
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+ return 0;
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+}
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+
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+int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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+{
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+ int ret;
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+
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+ /* Consume 'booti' */
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+ argc--; argv++;
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+
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+ if (booti_start(cmdtp, flag, argc, argv, &images))
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+ return 1;
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+
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+ /*
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+ * We are doing the BOOTM_STATE_LOADOS state ourselves, so must
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+ * disable interrupts ourselves
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+ */
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+ bootm_disable_interrupts();
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+
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+ images.os.os = IH_OS_LINUX;
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+ ret = do_bootm_states(cmdtp, flag, argc, argv,
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+ BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
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+ BOOTM_STATE_OS_GO,
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+ &images, 1);
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+
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+ return ret;
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+}
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+
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+#ifdef CONFIG_SYS_LONGHELP
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+static char booti_help_text[] =
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+ "[addr [initrd[:size]] [fdt]]\n"
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+ " - boot Linux Image stored in memory\n"
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+ "\tThe argument 'initrd' is optional and specifies the address\n"
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+ "\tof the initrd in memory. The optional argument ':size' allows\n"
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+ "\tspecifying the size of RAW initrd.\n"
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+#if defined(CONFIG_OF_LIBFDT)
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+ "\tSince booting a Linux kernelrequires a flat device-tree\n"
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+ "\ta third argument is required which is the address of the\n"
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+ "\tdevice-tree blob. To boot that kernel without an initrd image,\n"
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+ "\tuse a '-' for the second argument.\n"
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+#endif
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+ "";
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+#endif
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+
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+U_BOOT_CMD(
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+ booti, CONFIG_SYS_MAXARGS, 1, do_booti,
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+ "boot arm64 Linux Image image from memory", booti_help_text
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+);
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+#endif /* CONFIG_CMD_BOOTI */
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