2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/byteorder.h>
11 #include <asm/cache.h>
13 #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
15 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
17 void (*kernel)(int, int, int, char *) = (void *)images->ep;
18 char *commandline = getenv("bootargs");
19 ulong initrd_start = images->rd_start;
20 ulong initrd_end = images->rd_end;
21 char *of_flat_tree = NULL;
22 #if defined(CONFIG_OF_LIBFDT)
23 /* did generic code already find a device tree? */
25 of_flat_tree = images->ft_addr;
27 if (!of_flat_tree && argc > 1)
28 of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
30 initrd_end = (ulong)of_flat_tree;
33 * allow the PREP bootm subcommand, it is required for bootm to work
35 if (flag & BOOTM_STATE_OS_PREP)
38 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
41 /* flushes data and instruction caches before calling the kernel */
43 flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
44 flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
46 debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
47 debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
48 /* kernel parameters passing
51 * r6 : initrd end or fdt
52 * r7 : kernel command line
53 * fdt is passed to kernel via r6, the same as initrd_end. fdt will be
54 * verified with fdt magic. when both initrd and fdt are used at the
55 * same time, fdt must follow immediately after initrd.
57 kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);