1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2007 Michal Simek
4 * (C) Copyright 2004 Atmark Techno, Inc.
13 #include <fdt_support.h>
15 #include <u-boot/zlib.h>
16 #include <asm/byteorder.h>
18 int do_bootm_linux(int flag, int argc, char * const argv[],
19 bootm_headers_t *images)
21 /* First parameter is mapped to $r5 for kernel boot args */
22 void (*thekernel) (char *, ulong, ulong);
23 char *commandline = env_get("bootargs");
24 ulong rd_data_start, rd_data_end;
27 * allow the PREP bootm subcommand, it is required for bootm to work
29 if (flag & BOOTM_STATE_OS_PREP)
32 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
37 char *of_flat_tree = NULL;
38 #if defined(CONFIG_OF_LIBFDT)
39 /* did generic code already find a device tree? */
41 of_flat_tree = images->ft_addr;
44 thekernel = (void (*)(char *, ulong, ulong))images->ep;
47 ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE,
48 &rd_data_start, &rd_data_end);
52 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
54 if (!of_flat_tree && argc > 1)
55 of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
57 /* fixup the initrd now that we know where it should be */
58 if (images->rd_start && images->rd_end && of_flat_tree) {
59 ret = fdt_initrd(of_flat_tree, images->rd_start,
66 printf("## Transferring control to Linux (at address 0x%08lx) ",
68 printf("ramdisk 0x%08lx, FDT 0x%08lx...\n",
69 rd_data_start, (ulong) of_flat_tree);
72 #ifdef XILINX_USE_DCACHE
73 flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
76 * Linux Kernel Parameters (passing device tree):
77 * r5: pointer to command line
78 * r6: pointer to ramdisk
79 * r7: pointer to the fdt, followed by the board info data
81 thekernel(commandline, rd_data_start, (ulong)of_flat_tree);