1 /* 2 * (C) Copyright 2003 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <common.h> 25 #include <command.h> 26 #include <image.h> 27 #include <u-boot/zlib.h> 28 #include <asm/byteorder.h> 29 #include <asm/addrspace.h> 30 31 DECLARE_GLOBAL_DATA_PTR; 32 33 #define LINUX_MAX_ENVS 256 34 #define LINUX_MAX_ARGS 256 35 36 static int linux_argc; 37 static char **linux_argv; 38 39 static char **linux_env; 40 static char *linux_env_p; 41 static int linux_env_idx; 42 43 static void linux_params_init(ulong start, char *commandline); 44 static void linux_env_set(char *env_name, char *env_val); 45 46 int do_bootm_linux(int flag, int argc, char * const argv[], 47 bootm_headers_t *images) 48 { 49 void (*theKernel) (int, char **, char **, int *); 50 char *commandline = getenv("bootargs"); 51 char env_buf[12]; 52 char *cp; 53 54 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 55 return 1; 56 57 /* find kernel entry point */ 58 theKernel = (void (*)(int, char **, char **, int *))images->ep; 59 60 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 61 62 #ifdef DEBUG 63 printf("## Transferring control to Linux (at address %08lx) ...\n", 64 (ulong) theKernel); 65 #endif 66 67 linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline); 68 69 #ifdef CONFIG_MEMSIZE_IN_BYTES 70 sprintf(env_buf, "%lu", (ulong)gd->ram_size); 71 debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size); 72 #else 73 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20)); 74 debug("## Giving linux memsize in MB, %lu\n", 75 (ulong)(gd->ram_size >> 20)); 76 #endif /* CONFIG_MEMSIZE_IN_BYTES */ 77 78 linux_env_set("memsize", env_buf); 79 80 sprintf(env_buf, "0x%08X", (uint) UNCACHED_SDRAM(images->rd_start)); 81 linux_env_set("initrd_start", env_buf); 82 83 sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start)); 84 linux_env_set("initrd_size", env_buf); 85 86 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); 87 linux_env_set("flash_start", env_buf); 88 89 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); 90 linux_env_set("flash_size", env_buf); 91 92 cp = getenv("ethaddr"); 93 if (cp) 94 linux_env_set("ethaddr", cp); 95 96 cp = getenv("eth1addr"); 97 if (cp) 98 linux_env_set("eth1addr", cp); 99 100 /* we assume that the kernel is in place */ 101 printf("\nStarting kernel ...\n\n"); 102 103 theKernel(linux_argc, linux_argv, linux_env, 0); 104 105 /* does not return */ 106 return 1; 107 } 108 109 static void linux_params_init(ulong start, char *line) 110 { 111 char *next, *quote, *argp; 112 113 linux_argc = 1; 114 linux_argv = (char **) start; 115 linux_argv[0] = 0; 116 argp = (char *) (linux_argv + LINUX_MAX_ARGS); 117 118 next = line; 119 120 while (line && *line && linux_argc < LINUX_MAX_ARGS) { 121 quote = strchr(line, '"'); 122 next = strchr(line, ' '); 123 124 while (next && quote && quote < next) { 125 /* we found a left quote before the next blank 126 * now we have to find the matching right quote 127 */ 128 next = strchr(quote + 1, '"'); 129 if (next) { 130 quote = strchr(next + 1, '"'); 131 next = strchr(next + 1, ' '); 132 } 133 } 134 135 if (!next) 136 next = line + strlen(line); 137 138 linux_argv[linux_argc] = argp; 139 memcpy(argp, line, next - line); 140 argp[next - line] = 0; 141 142 argp += next - line + 1; 143 linux_argc++; 144 145 if (*next) 146 next++; 147 148 line = next; 149 } 150 151 linux_env = (char **) (((ulong) argp + 15) & ~15); 152 linux_env[0] = 0; 153 linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS); 154 linux_env_idx = 0; 155 } 156 157 static void linux_env_set(char *env_name, char *env_val) 158 { 159 if (linux_env_idx < LINUX_MAX_ENVS - 1) { 160 linux_env[linux_env_idx] = linux_env_p; 161 162 strcpy(linux_env_p, env_name); 163 linux_env_p += strlen(env_name); 164 165 strcpy(linux_env_p, "="); 166 linux_env_p += 1; 167 168 strcpy(linux_env_p, env_val); 169 linux_env_p += strlen(env_val); 170 171 linux_env_p++; 172 linux_env[++linux_env_idx] = 0; 173 } 174 } 175