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 debug("## Transferring control to Linux (at address %08lx) ...\n", 63 (ulong) theKernel); 64 65 linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline); 66 67 #ifdef CONFIG_MEMSIZE_IN_BYTES 68 sprintf(env_buf, "%lu", (ulong)gd->ram_size); 69 debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size); 70 #else 71 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20)); 72 debug("## Giving linux memsize in MB, %lu\n", 73 (ulong)(gd->ram_size >> 20)); 74 #endif /* CONFIG_MEMSIZE_IN_BYTES */ 75 76 linux_env_set("memsize", env_buf); 77 78 sprintf(env_buf, "0x%08X", (uint) UNCACHED_SDRAM(images->rd_start)); 79 linux_env_set("initrd_start", env_buf); 80 81 sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start)); 82 linux_env_set("initrd_size", env_buf); 83 84 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); 85 linux_env_set("flash_start", env_buf); 86 87 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); 88 linux_env_set("flash_size", env_buf); 89 90 cp = getenv("ethaddr"); 91 if (cp) 92 linux_env_set("ethaddr", cp); 93 94 cp = getenv("eth1addr"); 95 if (cp) 96 linux_env_set("eth1addr", cp); 97 98 /* we assume that the kernel is in place */ 99 printf("\nStarting kernel ...\n\n"); 100 101 theKernel(linux_argc, linux_argv, linux_env, 0); 102 103 /* does not return */ 104 return 1; 105 } 106 107 static void linux_params_init(ulong start, char *line) 108 { 109 char *next, *quote, *argp; 110 111 linux_argc = 1; 112 linux_argv = (char **) start; 113 linux_argv[0] = 0; 114 argp = (char *) (linux_argv + LINUX_MAX_ARGS); 115 116 next = line; 117 118 while (line && *line && linux_argc < LINUX_MAX_ARGS) { 119 quote = strchr(line, '"'); 120 next = strchr(line, ' '); 121 122 while (next && quote && quote < next) { 123 /* we found a left quote before the next blank 124 * now we have to find the matching right quote 125 */ 126 next = strchr(quote + 1, '"'); 127 if (next) { 128 quote = strchr(next + 1, '"'); 129 next = strchr(next + 1, ' '); 130 } 131 } 132 133 if (!next) 134 next = line + strlen(line); 135 136 linux_argv[linux_argc] = argp; 137 memcpy(argp, line, next - line); 138 argp[next - line] = 0; 139 140 argp += next - line + 1; 141 linux_argc++; 142 143 if (*next) 144 next++; 145 146 line = next; 147 } 148 149 linux_env = (char **) (((ulong) argp + 15) & ~15); 150 linux_env[0] = 0; 151 linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS); 152 linux_env_idx = 0; 153 } 154 155 static void linux_env_set(char *env_name, char *env_val) 156 { 157 if (linux_env_idx < LINUX_MAX_ENVS - 1) { 158 linux_env[linux_env_idx] = linux_env_p; 159 160 strcpy(linux_env_p, env_name); 161 linux_env_p += strlen(env_name); 162 163 strcpy(linux_env_p, "="); 164 linux_env_p += 1; 165 166 strcpy(linux_env_p, env_val); 167 linux_env_p += strlen(env_val); 168 169 linux_env_p++; 170 linux_env[++linux_env_idx] = 0; 171 } 172 } 173