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 static void boot_jump_linux(bootm_headers_t *images) 47 { 48 void (*theKernel) (int, char **, char **, int *); 49 50 /* find kernel entry point */ 51 theKernel = (void (*)(int, char **, char **, int *))images->ep; 52 53 debug("## Transferring control to Linux (at address %08lx) ...\n", 54 (ulong) theKernel); 55 56 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 57 58 /* we assume that the kernel is in place */ 59 printf("\nStarting kernel ...\n\n"); 60 61 theKernel(linux_argc, linux_argv, linux_env, 0); 62 } 63 64 int do_bootm_linux(int flag, int argc, char * const argv[], 65 bootm_headers_t *images) 66 { 67 char *commandline = getenv("bootargs"); 68 char env_buf[12]; 69 char *cp; 70 71 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 72 return 1; 73 74 linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline); 75 76 #ifdef CONFIG_MEMSIZE_IN_BYTES 77 sprintf(env_buf, "%lu", (ulong)gd->ram_size); 78 debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size); 79 #else 80 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20)); 81 debug("## Giving linux memsize in MB, %lu\n", 82 (ulong)(gd->ram_size >> 20)); 83 #endif /* CONFIG_MEMSIZE_IN_BYTES */ 84 85 linux_env_set("memsize", env_buf); 86 87 sprintf(env_buf, "0x%08X", (uint) UNCACHED_SDRAM(images->rd_start)); 88 linux_env_set("initrd_start", env_buf); 89 90 sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start)); 91 linux_env_set("initrd_size", env_buf); 92 93 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); 94 linux_env_set("flash_start", env_buf); 95 96 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); 97 linux_env_set("flash_size", env_buf); 98 99 cp = getenv("ethaddr"); 100 if (cp) 101 linux_env_set("ethaddr", cp); 102 103 cp = getenv("eth1addr"); 104 if (cp) 105 linux_env_set("eth1addr", cp); 106 107 boot_jump_linux(images); 108 109 /* does not return */ 110 return 1; 111 } 112 113 static void linux_params_init(ulong start, char *line) 114 { 115 char *next, *quote, *argp; 116 117 linux_argc = 1; 118 linux_argv = (char **) start; 119 linux_argv[0] = 0; 120 argp = (char *) (linux_argv + LINUX_MAX_ARGS); 121 122 next = line; 123 124 while (line && *line && linux_argc < LINUX_MAX_ARGS) { 125 quote = strchr(line, '"'); 126 next = strchr(line, ' '); 127 128 while (next && quote && quote < next) { 129 /* we found a left quote before the next blank 130 * now we have to find the matching right quote 131 */ 132 next = strchr(quote + 1, '"'); 133 if (next) { 134 quote = strchr(next + 1, '"'); 135 next = strchr(next + 1, ' '); 136 } 137 } 138 139 if (!next) 140 next = line + strlen(line); 141 142 linux_argv[linux_argc] = argp; 143 memcpy(argp, line, next - line); 144 argp[next - line] = 0; 145 146 argp += next - line + 1; 147 linux_argc++; 148 149 if (*next) 150 next++; 151 152 line = next; 153 } 154 155 linux_env = (char **) (((ulong) argp + 15) & ~15); 156 linux_env[0] = 0; 157 linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS); 158 linux_env_idx = 0; 159 } 160 161 static void linux_env_set(char *env_name, char *env_val) 162 { 163 if (linux_env_idx < LINUX_MAX_ENVS - 1) { 164 linux_env[linux_env_idx] = linux_env_p; 165 166 strcpy(linux_env_p, env_name); 167 linux_env_p += strlen(env_name); 168 169 strcpy(linux_env_p, "="); 170 linux_env_p += 1; 171 172 strcpy(linux_env_p, env_val); 173 linux_env_p += strlen(env_val); 174 175 linux_env_p++; 176 linux_env[++linux_env_idx] = 0; 177 } 178 } 179