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 * See file CREDITS for list of people who contributed to this 9 * project. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 24 * 25 */ 26 27 #include <common.h> 28 #include <command.h> 29 #include <asm/byteorder.h> 30 31 #ifdef CONFIG_SYS_DEBUG 32 static void hexdump(unsigned char *buf, int len) 33 { 34 int i; 35 36 for (i = 0; i < len; i++) { 37 if ((i % 16) == 0) 38 printf("%s%08x: ", i ? "\n" : "", 39 (unsigned int)&buf[i]); 40 printf("%02x ", buf[i]); 41 } 42 printf("\n"); 43 } 44 #endif 45 46 #define MOUNT_ROOT_RDONLY 0x000 47 #define RAMDISK_FLAGS 0x004 48 #define ORIG_ROOT_DEV 0x008 49 #define LOADER_TYPE 0x00c 50 #define INITRD_START 0x010 51 #define INITRD_SIZE 0x014 52 #define COMMAND_LINE 0x100 53 54 #define RD_PROMPT (1<<15) 55 #define RD_DOLOAD (1<<14) 56 #define CMD_ARG_RD_PROMPT "prompt_ramdisk=" 57 #define CMD_ARG_RD_DOLOAD "load_ramdisk=" 58 59 #ifdef CONFIG_SH_SDRAM_OFFSET 60 #define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET) 61 #else 62 #define GET_INITRD_START(initrd, linux) (initrd - linux) 63 #endif 64 65 static void set_sh_linux_param(unsigned long param_addr, unsigned long data) 66 { 67 *(unsigned long *)(param_addr) = data; 68 } 69 70 static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base) 71 { 72 unsigned long val = 0; 73 char *p = strstr(cmdline, key); 74 if (p) { 75 p += strlen(key); 76 val = simple_strtol(p, NULL, base); 77 } 78 return val; 79 } 80 81 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 82 { 83 /* Linux kernel load address */ 84 void (*kernel) (void) = (void (*)(void))images->ep; 85 /* empty_zero_page */ 86 unsigned char *param 87 = (unsigned char *)image_get_load(images->legacy_hdr_os); 88 /* Linux kernel command line */ 89 char *cmdline = (char *)param + COMMAND_LINE; 90 /* PAGE_SIZE */ 91 unsigned long size = images->ep - (unsigned long)param; 92 char *bootargs = getenv("bootargs"); 93 94 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 95 return 1; 96 97 /* Setup parameters */ 98 memset(param, 0, size); /* Clear zero page */ 99 100 /* Set commandline */ 101 strcpy(cmdline, bootargs); 102 103 sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10); 104 /* Initrd */ 105 if (images->rd_start || images->rd_end) { 106 unsigned long ramdisk_flags = 0; 107 int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10); 108 if (val == 1) 109 ramdisk_flags |= RD_PROMPT; 110 else 111 ramdisk_flags &= ~RD_PROMPT; 112 113 val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10); 114 if (val == 1) 115 ramdisk_flags |= RD_DOLOAD; 116 else 117 ramdisk_flags &= ~RD_DOLOAD; 118 119 set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001); 120 set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags); 121 set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200); 122 set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001); 123 set_sh_linux_param((unsigned long)param + INITRD_START, 124 GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE)); 125 set_sh_linux_param((unsigned long)param + INITRD_SIZE, 126 images->rd_end - images->rd_start); 127 } 128 129 /* Boot kernel */ 130 kernel(); 131 /* does not return */ 132 133 return 1; 134 } 135