1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
6 * (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
7 * (c) Copyright 2008 Renesas Solutions Corp.
8 */
9
10 #include <common.h>
11 #include <command.h>
12 #include <asm/byteorder.h>
13 #include <asm/zimage.h>
14
15 #ifdef CONFIG_SYS_DEBUG
hexdump(unsigned char * buf,int len)16 static void hexdump(unsigned char *buf, int len)
17 {
18 int i;
19
20 for (i = 0; i < len; i++) {
21 if ((i % 16) == 0)
22 printf("%s%08x: ", i ? "\n" : "",
23 (unsigned int)&buf[i]);
24 printf("%02x ", buf[i]);
25 }
26 printf("\n");
27 }
28 #endif
29
30 #ifdef CONFIG_SH_SDRAM_OFFSET
31 #define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
32 #else
33 #define GET_INITRD_START(initrd, linux) (initrd - linux)
34 #endif
35
set_sh_linux_param(unsigned long param_addr,unsigned long data)36 static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
37 {
38 *(unsigned long *)(param_addr) = data;
39 }
40
sh_check_cmd_arg(char * cmdline,char * key,int base)41 static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
42 {
43 unsigned long val = 0;
44 char *p = strstr(cmdline, key);
45 if (p) {
46 p += strlen(key);
47 val = simple_strtol(p, NULL, base);
48 }
49 return val;
50 }
51
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)52 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
53 {
54 /* Linux kernel load address */
55 void (*kernel) (void) = (void (*)(void))images->ep;
56 /* empty_zero_page */
57 unsigned char *param
58 = (unsigned char *)image_get_load(images->legacy_hdr_os);
59 /* Linux kernel command line */
60 char *cmdline = (char *)param + COMMAND_LINE;
61 /* PAGE_SIZE */
62 unsigned long size = images->ep - (unsigned long)param;
63 char *bootargs = env_get("bootargs");
64
65 /*
66 * allow the PREP bootm subcommand, it is required for bootm to work
67 */
68 if (flag & BOOTM_STATE_OS_PREP)
69 return 0;
70
71 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
72 return 1;
73
74 /* Clear zero page */
75 memset(param, 0, size);
76
77 /* Set commandline */
78 strcpy(cmdline, bootargs);
79
80 /* Initrd */
81 if (images->rd_start || images->rd_end) {
82 unsigned long ramdisk_flags = 0;
83 int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
84 if (val == 1)
85 ramdisk_flags |= RD_PROMPT;
86 else
87 ramdisk_flags &= ~RD_PROMPT;
88
89 val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
90 if (val == 1)
91 ramdisk_flags |= RD_DOLOAD;
92 else
93 ramdisk_flags &= ~RD_DOLOAD;
94
95 set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
96 set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
97 set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
98 set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
99 set_sh_linux_param((unsigned long)param + INITRD_START,
100 GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE));
101 set_sh_linux_param((unsigned long)param + INITRD_SIZE,
102 images->rd_end - images->rd_start);
103 }
104
105 /* Boot kernel */
106 kernel();
107
108 /* does not return */
109 return 1;
110 }
111