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 <config.h>
11 #include <bootm.h>
12 #include <command.h>
13 #include <env.h>
14 #include <image.h>
15 #include <asm/byteorder.h>
16 #include <asm/global_data.h>
17 #include <asm/zimage.h>
18
19 DECLARE_GLOBAL_DATA_PTR;
20
21 #ifdef CONFIG_SH_SDRAM_OFFSET
22 #define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
23 #else
24 #define GET_INITRD_START(initrd, linux) (initrd - linux)
25 #endif
26
set_sh_linux_param(unsigned long param_addr,unsigned long data)27 static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
28 {
29 *(unsigned long *)(param_addr) = data;
30 }
31
sh_check_cmd_arg(char * cmdline,char * key,int base)32 static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
33 {
34 unsigned long val = 0;
35 char *p = strstr(cmdline, key);
36 if (p) {
37 p += strlen(key);
38 val = simple_strtol(p, NULL, base);
39 }
40 return val;
41 }
42
do_bootm_linux(int flag,struct bootm_info * bmi)43 int do_bootm_linux(int flag, struct bootm_info *bmi)
44 {
45 struct bootm_headers *images = bmi->images;
46
47 /* Linux kernel load address */
48 void (*kernel) (void) = (void (*)(void))images->ep;
49 /* empty_zero_page */
50 unsigned char *param
51 = (unsigned char *)image_get_load(images->legacy_hdr_os);
52 /* Linux kernel command line */
53 char *cmdline = (char *)param + COMMAND_LINE;
54 /* PAGE_SIZE */
55 unsigned long size = images->ep - (unsigned long)param;
56 char *bootargs = env_get("bootargs");
57
58 /*
59 * allow the PREP bootm subcommand, it is required for bootm to work
60 */
61 if (flag & BOOTM_STATE_OS_PREP)
62 return 0;
63
64 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
65 return 1;
66
67 /* Clear zero page */
68 memset(param, 0, size);
69
70 /* Set commandline */
71 strcpy(cmdline, bootargs);
72
73 /* Initrd */
74 if (images->rd_start || images->rd_end) {
75 unsigned long ramdisk_flags = 0;
76 int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
77 if (val == 1)
78 ramdisk_flags |= RD_PROMPT;
79 else
80 ramdisk_flags &= ~RD_PROMPT;
81
82 val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
83 if (val == 1)
84 ramdisk_flags |= RD_DOLOAD;
85 else
86 ramdisk_flags &= ~RD_DOLOAD;
87
88 set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
89 set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
90 set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
91 set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
92 set_sh_linux_param((unsigned long)param + INITRD_START,
93 GET_INITRD_START(images->rd_start, CFG_SYS_SDRAM_BASE));
94 set_sh_linux_param((unsigned long)param + INITRD_SIZE,
95 images->rd_end - images->rd_start);
96 }
97
98 /* Boot kernel */
99 kernel();
100
101 /* does not return */
102 return 1;
103 }
104