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 #include <asm/zimage.h> 31 32 #ifdef CONFIG_SYS_DEBUG 33 static void hexdump(unsigned char *buf, int len) 34 { 35 int i; 36 37 for (i = 0; i < len; i++) { 38 if ((i % 16) == 0) 39 printf("%s%08x: ", i ? "\n" : "", 40 (unsigned int)&buf[i]); 41 printf("%02x ", buf[i]); 42 } 43 printf("\n"); 44 } 45 #endif 46 47 #ifdef CONFIG_SH_SDRAM_OFFSET 48 #define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET) 49 #else 50 #define GET_INITRD_START(initrd, linux) (initrd - linux) 51 #endif 52 53 static void set_sh_linux_param(unsigned long param_addr, unsigned long data) 54 { 55 *(unsigned long *)(param_addr) = data; 56 } 57 58 static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base) 59 { 60 unsigned long val = 0; 61 char *p = strstr(cmdline, key); 62 if (p) { 63 p += strlen(key); 64 val = simple_strtol(p, NULL, base); 65 } 66 return val; 67 } 68 69 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 70 { 71 /* Linux kernel load address */ 72 void (*kernel) (void) = (void (*)(void))images->ep; 73 /* empty_zero_page */ 74 unsigned char *param 75 = (unsigned char *)image_get_load(images->legacy_hdr_os); 76 /* Linux kernel command line */ 77 char *cmdline = (char *)param + COMMAND_LINE; 78 /* PAGE_SIZE */ 79 unsigned long size = images->ep - (unsigned long)param; 80 char *bootargs = getenv("bootargs"); 81 82 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 83 return 1; 84 85 /* Clear zero page */ 86 memset(param, 0, size); 87 88 /* Set commandline */ 89 strcpy(cmdline, bootargs); 90 91 /* Initrd */ 92 if (images->rd_start || images->rd_end) { 93 unsigned long ramdisk_flags = 0; 94 int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10); 95 if (val == 1) 96 ramdisk_flags |= RD_PROMPT; 97 else 98 ramdisk_flags &= ~RD_PROMPT; 99 100 val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10); 101 if (val == 1) 102 ramdisk_flags |= RD_DOLOAD; 103 else 104 ramdisk_flags &= ~RD_DOLOAD; 105 106 set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001); 107 set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags); 108 set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200); 109 set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001); 110 set_sh_linux_param((unsigned long)param + INITRD_START, 111 GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE)); 112 set_sh_linux_param((unsigned long)param + INITRD_SIZE, 113 images->rd_end - images->rd_start); 114 } 115 116 /* Boot kernel */ 117 kernel(); 118 119 /* does not return */ 120 return 1; 121 } 122