1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2010
4 * Renesas Solutions Corp.
5 * Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
6 */
7
8 /*
9 * Linux SuperH zImage loading and boot
10 */
11
12 #include <common.h>
13 #include <command.h>
14 #include <env.h>
15 #include <irq_func.h>
16 #include <asm/io.h>
17 #include <asm/zimage.h>
18
do_sh_zimageboot(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])19 int do_sh_zimageboot(struct cmd_tbl *cmdtp, int flag, int argc,
20 char *const argv[])
21 {
22 ulong (*zboot_entry)(int, char * const []) = NULL;
23 char *s0, *s1;
24 unsigned char *param = NULL;
25 char *cmdline;
26 char *bootargs;
27
28 disable_interrupts();
29
30 if (argc >= 3) {
31 /* argv[1] holds the address of the zImage */
32 s0 = argv[1];
33 /* argv[2] holds the address of zero page */
34 s1 = argv[2];
35 } else {
36 goto exit;
37 }
38
39 if (s0)
40 zboot_entry = (ulong (*)(int, char * const []))simple_strtoul(s0, NULL, 16);
41
42 /* empty_zero_page */
43 if (s1)
44 param = (unsigned char*)simple_strtoul(s1, NULL, 16);
45
46 /* Linux kernel command line */
47 cmdline = (char *)param + COMMAND_LINE;
48 bootargs = env_get("bootargs");
49
50 /* Clear zero page */
51 /* cppcheck-suppress nullPointer */
52 memset(param, 0, 0x1000);
53
54 /* Set commandline */
55 strcpy(cmdline, bootargs);
56
57 /* Boot */
58 zboot_entry(0, NULL);
59
60 exit:
61 return -1;
62 }
63
64 U_BOOT_CMD(
65 zimageboot, 3, 0, do_sh_zimageboot,
66 "Boot zImage for Renesas SH",
67 ""
68 );
69