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_prep_linux(bootm_headers_t *images) 47 { 48 char *commandline = getenv("bootargs"); 49 char env_buf[12]; 50 char *cp; 51 52 linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline); 53 54 #ifdef CONFIG_MEMSIZE_IN_BYTES 55 sprintf(env_buf, "%lu", (ulong)gd->ram_size); 56 debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size); 57 #else 58 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20)); 59 debug("## Giving linux memsize in MB, %lu\n", 60 (ulong)(gd->ram_size >> 20)); 61 #endif /* CONFIG_MEMSIZE_IN_BYTES */ 62 63 linux_env_set("memsize", env_buf); 64 65 sprintf(env_buf, "0x%08X", (uint) UNCACHED_SDRAM(images->rd_start)); 66 linux_env_set("initrd_start", env_buf); 67 68 sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start)); 69 linux_env_set("initrd_size", env_buf); 70 71 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); 72 linux_env_set("flash_start", env_buf); 73 74 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); 75 linux_env_set("flash_size", env_buf); 76 77 cp = getenv("ethaddr"); 78 if (cp) 79 linux_env_set("ethaddr", cp); 80 81 cp = getenv("eth1addr"); 82 if (cp) 83 linux_env_set("eth1addr", cp); 84 } 85 86 static void boot_jump_linux(bootm_headers_t *images) 87 { 88 void (*theKernel) (int, char **, char **, int *); 89 90 /* find kernel entry point */ 91 theKernel = (void (*)(int, char **, char **, int *))images->ep; 92 93 debug("## Transferring control to Linux (at address %08lx) ...\n", 94 (ulong) theKernel); 95 96 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 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 } 103 104 int do_bootm_linux(int flag, int argc, char * const argv[], 105 bootm_headers_t *images) 106 { 107 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 108 return 1; 109 110 boot_prep_linux(images); 111 boot_jump_linux(images); 112 113 /* does not return */ 114 return 1; 115 } 116 117 static void linux_params_init(ulong start, char *line) 118 { 119 char *next, *quote, *argp; 120 121 linux_argc = 1; 122 linux_argv = (char **) start; 123 linux_argv[0] = 0; 124 argp = (char *) (linux_argv + LINUX_MAX_ARGS); 125 126 next = line; 127 128 while (line && *line && linux_argc < LINUX_MAX_ARGS) { 129 quote = strchr(line, '"'); 130 next = strchr(line, ' '); 131 132 while (next && quote && quote < next) { 133 /* we found a left quote before the next blank 134 * now we have to find the matching right quote 135 */ 136 next = strchr(quote + 1, '"'); 137 if (next) { 138 quote = strchr(next + 1, '"'); 139 next = strchr(next + 1, ' '); 140 } 141 } 142 143 if (!next) 144 next = line + strlen(line); 145 146 linux_argv[linux_argc] = argp; 147 memcpy(argp, line, next - line); 148 argp[next - line] = 0; 149 150 argp += next - line + 1; 151 linux_argc++; 152 153 if (*next) 154 next++; 155 156 line = next; 157 } 158 159 linux_env = (char **) (((ulong) argp + 15) & ~15); 160 linux_env[0] = 0; 161 linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS); 162 linux_env_idx = 0; 163 } 164 165 static void linux_env_set(char *env_name, char *env_val) 166 { 167 if (linux_env_idx < LINUX_MAX_ENVS - 1) { 168 linux_env[linux_env_idx] = linux_env_p; 169 170 strcpy(linux_env_p, env_name); 171 linux_env_p += strlen(env_name); 172 173 strcpy(linux_env_p, "="); 174 linux_env_p += 1; 175 176 strcpy(linux_env_p, env_val); 177 linux_env_p += strlen(env_val); 178 179 linux_env_p++; 180 linux_env[++linux_env_idx] = 0; 181 } 182 } 183