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