1 /* 2 * (C) Copyright 2008 Semihalf 3 * 4 * (C) Copyright 2000-2006 5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 6 * 7 * See file CREDITS for list of people who contributed to this 8 * project. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation; either version 2 of 13 * the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 23 * MA 02111-1307 USA 24 */ 25 26 27 #include <common.h> 28 #include <watchdog.h> 29 #include <command.h> 30 #include <image.h> 31 #include <malloc.h> 32 #include <u-boot/zlib.h> 33 #include <bzlib.h> 34 #include <environment.h> 35 #include <asm/byteorder.h> 36 37 #if defined(CONFIG_OF_LIBFDT) 38 #include <fdt.h> 39 #include <libfdt.h> 40 #include <fdt_support.h> 41 42 #endif 43 44 #ifdef CONFIG_SYS_INIT_RAM_LOCK 45 #include <asm/cache.h> 46 #endif 47 48 DECLARE_GLOBAL_DATA_PTR; 49 50 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 51 extern ulong get_effective_memsize(void); 52 static ulong get_sp (void); 53 static void set_clocks_in_mhz (bd_t *kbd); 54 55 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE 56 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024) 57 #endif 58 59 static void boot_jump_linux(bootm_headers_t *images) 60 { 61 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6, 62 ulong r7, ulong r8, ulong r9); 63 #ifdef CONFIG_OF_LIBFDT 64 char *of_flat_tree = images->ft_addr; 65 #endif 66 67 kernel = (void (*)(bd_t *, ulong, ulong, ulong, 68 ulong, ulong, ulong))images->ep; 69 debug ("## Transferring control to Linux (at address %08lx) ...\n", 70 (ulong)kernel); 71 72 show_boot_progress (15); 73 74 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500) 75 unlock_ram_in_cache(); 76 #endif 77 78 #if defined(CONFIG_OF_LIBFDT) 79 if (of_flat_tree) { /* device tree; boot new style */ 80 /* 81 * Linux Kernel Parameters (passing device tree): 82 * r3: pointer to the fdt 83 * r4: 0 84 * r5: 0 85 * r6: epapr magic 86 * r7: size of IMA in bytes 87 * r8: 0 88 * r9: 0 89 */ 90 #if defined(CONFIG_85xx) || defined(CONFIG_440) 91 #define EPAPR_MAGIC (0x45504150) 92 #else 93 #define EPAPR_MAGIC (0x65504150) 94 #endif 95 96 debug (" Booting using OF flat tree...\n"); 97 WATCHDOG_RESET (); 98 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC, 99 CONFIG_SYS_BOOTMAPSZ, 0, 0); 100 /* does not return */ 101 } else 102 #endif 103 { 104 /* 105 * Linux Kernel Parameters (passing board info data): 106 * r3: ptr to board info data 107 * r4: initrd_start or 0 if no initrd 108 * r5: initrd_end - unused if r4 is 0 109 * r6: Start of command line string 110 * r7: End of command line string 111 * r8: 0 112 * r9: 0 113 */ 114 ulong cmd_start = images->cmdline_start; 115 ulong cmd_end = images->cmdline_end; 116 ulong initrd_start = images->initrd_start; 117 ulong initrd_end = images->initrd_end; 118 bd_t *kbd = images->kbd; 119 120 debug (" Booting using board info...\n"); 121 WATCHDOG_RESET (); 122 (*kernel) (kbd, initrd_start, initrd_end, 123 cmd_start, cmd_end, 0, 0); 124 /* does not return */ 125 } 126 return ; 127 } 128 129 void arch_lmb_reserve(struct lmb *lmb) 130 { 131 phys_size_t bootm_size; 132 ulong size, sp, bootmap_base; 133 134 bootmap_base = getenv_bootm_low(); 135 bootm_size = getenv_bootm_size(); 136 137 #ifdef DEBUG 138 if (((u64)bootmap_base + bootm_size) > 139 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size)) 140 puts("WARNING: bootm_low + bootm_size exceed total memory\n"); 141 if ((bootmap_base + bootm_size) > get_effective_memsize()) 142 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n"); 143 #endif 144 145 size = min(bootm_size, get_effective_memsize()); 146 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE); 147 148 if (size < bootm_size) { 149 ulong base = bootmap_base + size; 150 printf("WARNING: adjusting available memory to %lx\n", size); 151 lmb_reserve(lmb, base, bootm_size - size); 152 } 153 154 /* 155 * Booting a (Linux) kernel image 156 * 157 * Allocate space for command line and board info - the 158 * address should be as high as possible within the reach of 159 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 160 * memory, which means far enough below the current stack 161 * pointer. 162 */ 163 sp = get_sp(); 164 debug ("## Current stack ends at 0x%08lx\n", sp); 165 166 /* adjust sp by 4K to be safe */ 167 sp -= 4096; 168 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp)); 169 170 return ; 171 } 172 173 static void boot_prep_linux(void) 174 { 175 #ifdef CONFIG_MP 176 /* if we are MP make sure to flush the dcache() to any changes are made 177 * visibile to all other cores */ 178 flush_dcache(); 179 #endif 180 return ; 181 } 182 183 static int boot_cmdline_linux(bootm_headers_t *images) 184 { 185 ulong bootmap_base = getenv_bootm_low(); 186 ulong of_size = images->ft_len; 187 struct lmb *lmb = &images->lmb; 188 ulong *cmd_start = &images->cmdline_start; 189 ulong *cmd_end = &images->cmdline_end; 190 191 int ret = 0; 192 193 if (!of_size) { 194 /* allocate space and init command line */ 195 ret = boot_get_cmdline (lmb, cmd_start, cmd_end, bootmap_base); 196 if (ret) { 197 puts("ERROR with allocation of cmdline\n"); 198 return ret; 199 } 200 } 201 202 return ret; 203 } 204 205 static int boot_bd_t_linux(bootm_headers_t *images) 206 { 207 ulong bootmap_base = getenv_bootm_low(); 208 ulong of_size = images->ft_len; 209 struct lmb *lmb = &images->lmb; 210 bd_t **kbd = &images->kbd; 211 212 int ret = 0; 213 214 if (!of_size) { 215 /* allocate space for kernel copy of board info */ 216 ret = boot_get_kbd (lmb, kbd, bootmap_base); 217 if (ret) { 218 puts("ERROR with allocation of kernel bd\n"); 219 return ret; 220 } 221 set_clocks_in_mhz(*kbd); 222 } 223 224 return ret; 225 } 226 227 static int boot_body_linux(bootm_headers_t *images) 228 { 229 ulong rd_len; 230 struct lmb *lmb = &images->lmb; 231 ulong *initrd_start = &images->initrd_start; 232 ulong *initrd_end = &images->initrd_end; 233 #if defined(CONFIG_OF_LIBFDT) 234 ulong bootmap_base = getenv_bootm_low(); 235 ulong of_size = images->ft_len; 236 char **of_flat_tree = &images->ft_addr; 237 #endif 238 239 int ret; 240 241 /* allocate space and init command line */ 242 ret = boot_cmdline_linux(images); 243 if (ret) 244 return ret; 245 246 /* allocate space for kernel copy of board info */ 247 ret = boot_bd_t_linux(images); 248 if (ret) 249 return ret; 250 251 rd_len = images->rd_end - images->rd_start; 252 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end); 253 if (ret) 254 return ret; 255 256 #if defined(CONFIG_OF_LIBFDT) 257 ret = boot_relocate_fdt(lmb, bootmap_base, of_flat_tree, &of_size); 258 if (ret) 259 return ret; 260 261 /* 262 * Add the chosen node if it doesn't exist, add the env and bd_t 263 * if the user wants it (the logic is in the subroutines). 264 */ 265 if (of_size) { 266 if (fdt_chosen(*of_flat_tree, 1) < 0) { 267 puts ("ERROR: "); 268 puts ("/chosen node create failed"); 269 puts (" - must RESET the board to recover.\n"); 270 return -1; 271 } 272 #ifdef CONFIG_OF_BOARD_SETUP 273 /* Call the board-specific fixup routine */ 274 ft_board_setup(*of_flat_tree, gd->bd); 275 #endif 276 277 /* Delete the old LMB reservation */ 278 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree, 279 (phys_size_t)fdt_totalsize(*of_flat_tree)); 280 281 ret = fdt_resize(*of_flat_tree); 282 if (ret < 0) 283 return ret; 284 of_size = ret; 285 286 if (*initrd_start && *initrd_end) 287 of_size += FDT_RAMDISK_OVERHEAD; 288 /* Create a new LMB reservation */ 289 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size); 290 291 /* fixup the initrd now that we know where it should be */ 292 if (*initrd_start && *initrd_end) 293 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1); 294 } 295 #endif /* CONFIG_OF_LIBFDT */ 296 return 0; 297 } 298 299 __attribute__((noinline)) 300 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) 301 { 302 int ret; 303 304 if (flag & BOOTM_STATE_OS_CMDLINE) { 305 boot_cmdline_linux(images); 306 return 0; 307 } 308 309 if (flag & BOOTM_STATE_OS_BD_T) { 310 boot_bd_t_linux(images); 311 return 0; 312 } 313 314 if (flag & BOOTM_STATE_OS_PREP) { 315 boot_prep_linux(); 316 return 0; 317 } 318 319 if (flag & BOOTM_STATE_OS_GO) { 320 boot_jump_linux(images); 321 return 0; 322 } 323 324 boot_prep_linux(); 325 ret = boot_body_linux(images); 326 if (ret) 327 return ret; 328 boot_jump_linux(images); 329 330 return 0; 331 } 332 333 static ulong get_sp (void) 334 { 335 ulong sp; 336 337 asm( "mr %0,1": "=r"(sp) : ); 338 return sp; 339 } 340 341 static void set_clocks_in_mhz (bd_t *kbd) 342 { 343 char *s; 344 345 if ((s = getenv ("clocks_in_mhz")) != NULL) { 346 /* convert all clock information to MHz */ 347 kbd->bi_intfreq /= 1000000L; 348 kbd->bi_busfreq /= 1000000L; 349 #if defined(CONFIG_MPC8220) 350 kbd->bi_inpfreq /= 1000000L; 351 kbd->bi_pcifreq /= 1000000L; 352 kbd->bi_pevfreq /= 1000000L; 353 kbd->bi_flbfreq /= 1000000L; 354 kbd->bi_vcofreq /= 1000000L; 355 #endif 356 #if defined(CONFIG_CPM2) 357 kbd->bi_cpmfreq /= 1000000L; 358 kbd->bi_brgfreq /= 1000000L; 359 kbd->bi_sccfreq /= 1000000L; 360 kbd->bi_vco /= 1000000L; 361 #endif 362 #if defined(CONFIG_MPC5xxx) 363 kbd->bi_ipbfreq /= 1000000L; 364 kbd->bi_pcifreq /= 1000000L; 365 #endif /* CONFIG_MPC5xxx */ 366 } 367 } 368