1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2003
3*4882a593Smuzhiyun * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
6*4882a593Smuzhiyun * (c) Copyright 2008 Renesas Solutions Corp.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <common.h>
12*4882a593Smuzhiyun #include <command.h>
13*4882a593Smuzhiyun #include <asm/byteorder.h>
14*4882a593Smuzhiyun #include <asm/zimage.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #ifdef CONFIG_SYS_DEBUG
hexdump(unsigned char * buf,int len)17*4882a593Smuzhiyun static void hexdump(unsigned char *buf, int len)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun int i;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun for (i = 0; i < len; i++) {
22*4882a593Smuzhiyun if ((i % 16) == 0)
23*4882a593Smuzhiyun printf("%s%08x: ", i ? "\n" : "",
24*4882a593Smuzhiyun (unsigned int)&buf[i]);
25*4882a593Smuzhiyun printf("%02x ", buf[i]);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun printf("\n");
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun #endif
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #ifdef CONFIG_SH_SDRAM_OFFSET
32*4882a593Smuzhiyun #define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
33*4882a593Smuzhiyun #else
34*4882a593Smuzhiyun #define GET_INITRD_START(initrd, linux) (initrd - linux)
35*4882a593Smuzhiyun #endif
36*4882a593Smuzhiyun
set_sh_linux_param(unsigned long param_addr,unsigned long data)37*4882a593Smuzhiyun static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun *(unsigned long *)(param_addr) = data;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
sh_check_cmd_arg(char * cmdline,char * key,int base)42*4882a593Smuzhiyun static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun unsigned long val = 0;
45*4882a593Smuzhiyun char *p = strstr(cmdline, key);
46*4882a593Smuzhiyun if (p) {
47*4882a593Smuzhiyun p += strlen(key);
48*4882a593Smuzhiyun val = simple_strtol(p, NULL, base);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun return val;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)53*4882a593Smuzhiyun int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun /* Linux kernel load address */
56*4882a593Smuzhiyun void (*kernel) (void) = (void (*)(void))images->ep;
57*4882a593Smuzhiyun /* empty_zero_page */
58*4882a593Smuzhiyun unsigned char *param
59*4882a593Smuzhiyun = (unsigned char *)image_get_load(images->legacy_hdr_os);
60*4882a593Smuzhiyun /* Linux kernel command line */
61*4882a593Smuzhiyun char *cmdline = (char *)param + COMMAND_LINE;
62*4882a593Smuzhiyun /* PAGE_SIZE */
63*4882a593Smuzhiyun unsigned long size = images->ep - (unsigned long)param;
64*4882a593Smuzhiyun char *bootargs = env_get("bootargs");
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun /*
67*4882a593Smuzhiyun * allow the PREP bootm subcommand, it is required for bootm to work
68*4882a593Smuzhiyun */
69*4882a593Smuzhiyun if (flag & BOOTM_STATE_OS_PREP)
70*4882a593Smuzhiyun return 0;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
73*4882a593Smuzhiyun return 1;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun /* Clear zero page */
76*4882a593Smuzhiyun memset(param, 0, size);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun /* Set commandline */
79*4882a593Smuzhiyun strcpy(cmdline, bootargs);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun /* Initrd */
82*4882a593Smuzhiyun if (images->rd_start || images->rd_end) {
83*4882a593Smuzhiyun unsigned long ramdisk_flags = 0;
84*4882a593Smuzhiyun int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
85*4882a593Smuzhiyun if (val == 1)
86*4882a593Smuzhiyun ramdisk_flags |= RD_PROMPT;
87*4882a593Smuzhiyun else
88*4882a593Smuzhiyun ramdisk_flags &= ~RD_PROMPT;
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
91*4882a593Smuzhiyun if (val == 1)
92*4882a593Smuzhiyun ramdisk_flags |= RD_DOLOAD;
93*4882a593Smuzhiyun else
94*4882a593Smuzhiyun ramdisk_flags &= ~RD_DOLOAD;
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
97*4882a593Smuzhiyun set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
98*4882a593Smuzhiyun set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
99*4882a593Smuzhiyun set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
100*4882a593Smuzhiyun set_sh_linux_param((unsigned long)param + INITRD_START,
101*4882a593Smuzhiyun GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE));
102*4882a593Smuzhiyun set_sh_linux_param((unsigned long)param + INITRD_SIZE,
103*4882a593Smuzhiyun images->rd_end - images->rd_start);
104*4882a593Smuzhiyun }
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun /* Boot kernel */
107*4882a593Smuzhiyun kernel();
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun /* does not return */
110*4882a593Smuzhiyun return 1;
111*4882a593Smuzhiyun }
112