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 #include <asm/mp.h> 37 38 #if defined(CONFIG_OF_LIBFDT) 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 ulong get_effective_memsize(void); 51 static ulong get_sp (void); 52 static void set_clocks_in_mhz (bd_t *kbd); 53 54 #ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE 55 #define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024) 56 #endif 57 58 static void boot_jump_linux(bootm_headers_t *images) 59 { 60 void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6, 61 ulong r7, ulong r8, ulong r9); 62 #ifdef CONFIG_OF_LIBFDT 63 char *of_flat_tree = images->ft_addr; 64 #endif 65 66 kernel = (void (*)(bd_t *, ulong, ulong, ulong, 67 ulong, ulong, ulong))images->ep; 68 debug ("## Transferring control to Linux (at address %08lx) ...\n", 69 (ulong)kernel); 70 71 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 72 73 #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500) 74 unlock_ram_in_cache(); 75 #endif 76 77 #if defined(CONFIG_OF_LIBFDT) 78 if (of_flat_tree) { /* device tree; boot new style */ 79 /* 80 * Linux Kernel Parameters (passing device tree): 81 * r3: pointer to the fdt 82 * r4: 0 83 * r5: 0 84 * r6: epapr magic 85 * r7: size of IMA in bytes 86 * r8: 0 87 * r9: 0 88 */ 89 debug (" Booting using OF flat tree...\n"); 90 WATCHDOG_RESET (); 91 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC, 92 getenv_bootm_mapsize(), 0, 0); 93 /* does not return */ 94 } else 95 #endif 96 { 97 /* 98 * Linux Kernel Parameters (passing board info data): 99 * r3: ptr to board info data 100 * r4: initrd_start or 0 if no initrd 101 * r5: initrd_end - unused if r4 is 0 102 * r6: Start of command line string 103 * r7: End of command line string 104 * r8: 0 105 * r9: 0 106 */ 107 ulong cmd_start = images->cmdline_start; 108 ulong cmd_end = images->cmdline_end; 109 ulong initrd_start = images->initrd_start; 110 ulong initrd_end = images->initrd_end; 111 bd_t *kbd = images->kbd; 112 113 debug (" Booting using board info...\n"); 114 WATCHDOG_RESET (); 115 (*kernel) (kbd, initrd_start, initrd_end, 116 cmd_start, cmd_end, 0, 0); 117 /* does not return */ 118 } 119 return ; 120 } 121 122 void arch_lmb_reserve(struct lmb *lmb) 123 { 124 phys_size_t bootm_size; 125 ulong size, sp, bootmap_base; 126 127 bootmap_base = getenv_bootm_low(); 128 bootm_size = getenv_bootm_size(); 129 130 #ifdef DEBUG 131 if (((u64)bootmap_base + bootm_size) > 132 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size)) 133 puts("WARNING: bootm_low + bootm_size exceed total memory\n"); 134 if ((bootmap_base + bootm_size) > get_effective_memsize()) 135 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n"); 136 #endif 137 138 size = min(bootm_size, get_effective_memsize()); 139 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE); 140 141 if (size < bootm_size) { 142 ulong base = bootmap_base + size; 143 printf("WARNING: adjusting available memory to %lx\n", size); 144 lmb_reserve(lmb, base, bootm_size - size); 145 } 146 147 /* 148 * Booting a (Linux) kernel image 149 * 150 * Allocate space for command line and board info - the 151 * address should be as high as possible within the reach of 152 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 153 * memory, which means far enough below the current stack 154 * pointer. 155 */ 156 sp = get_sp(); 157 debug ("## Current stack ends at 0x%08lx\n", sp); 158 159 /* adjust sp by 4K to be safe */ 160 sp -= 4096; 161 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp)); 162 163 #ifdef CONFIG_MP 164 cpu_mp_lmb_reserve(lmb); 165 #endif 166 167 return ; 168 } 169 170 static void boot_prep_linux(bootm_headers_t *images) 171 { 172 #ifdef CONFIG_MP 173 /* 174 * if we are MP make sure to flush the device tree so any changes are 175 * made visibile to all other cores. In AMP boot scenarios the cores 176 * might not be HW cache coherent with each other. 177 */ 178 flush_cache((unsigned long)images->ft_addr, images->ft_len); 179 #endif 180 } 181 182 static int boot_cmdline_linux(bootm_headers_t *images) 183 { 184 ulong of_size = images->ft_len; 185 struct lmb *lmb = &images->lmb; 186 ulong *cmd_start = &images->cmdline_start; 187 ulong *cmd_end = &images->cmdline_end; 188 189 int ret = 0; 190 191 if (!of_size) { 192 /* allocate space and init command line */ 193 ret = boot_get_cmdline (lmb, cmd_start, cmd_end); 194 if (ret) { 195 puts("ERROR with allocation of cmdline\n"); 196 return ret; 197 } 198 } 199 200 return ret; 201 } 202 203 static int boot_bd_t_linux(bootm_headers_t *images) 204 { 205 ulong of_size = images->ft_len; 206 struct lmb *lmb = &images->lmb; 207 bd_t **kbd = &images->kbd; 208 209 int ret = 0; 210 211 if (!of_size) { 212 /* allocate space for kernel copy of board info */ 213 ret = boot_get_kbd (lmb, kbd); 214 if (ret) { 215 puts("ERROR with allocation of kernel bd\n"); 216 return ret; 217 } 218 set_clocks_in_mhz(*kbd); 219 } 220 221 return ret; 222 } 223 224 /* 225 * Verify the device tree. 226 * 227 * This function is called after all device tree fix-ups have been enacted, 228 * so that the final device tree can be verified. The definition of "verified" 229 * is up to the specific implementation. However, it generally means that the 230 * addresses of some of the devices in the device tree are compared with the 231 * actual addresses at which U-Boot has placed them. 232 * 233 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the 234 * boot process. 235 */ 236 static int __ft_verify_fdt(void *fdt) 237 { 238 return 1; 239 } 240 __attribute__((weak, alias("__ft_verify_fdt"))) int ft_verify_fdt(void *fdt); 241 242 static int boot_body_linux(bootm_headers_t *images) 243 { 244 ulong rd_len; 245 struct lmb *lmb = &images->lmb; 246 ulong *initrd_start = &images->initrd_start; 247 ulong *initrd_end = &images->initrd_end; 248 #if defined(CONFIG_OF_LIBFDT) 249 ulong of_size = images->ft_len; 250 char **of_flat_tree = &images->ft_addr; 251 #endif 252 253 int ret; 254 255 #if defined(CONFIG_OF_LIBFDT) 256 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree); 257 #endif 258 259 /* allocate space and init command line */ 260 ret = boot_cmdline_linux(images); 261 if (ret) 262 return ret; 263 264 /* allocate space for kernel copy of board info */ 265 ret = boot_bd_t_linux(images); 266 if (ret) 267 return ret; 268 269 rd_len = images->rd_end - images->rd_start; 270 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end); 271 if (ret) 272 return ret; 273 274 #if defined(CONFIG_OF_LIBFDT) 275 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size); 276 if (ret) 277 return ret; 278 279 /* 280 * Add the chosen node if it doesn't exist, add the env and bd_t 281 * if the user wants it (the logic is in the subroutines). 282 */ 283 if (of_size) { 284 if (fdt_chosen(*of_flat_tree, 1) < 0) { 285 puts ("ERROR: "); 286 puts ("/chosen node create failed"); 287 puts (" - must RESET the board to recover.\n"); 288 return -1; 289 } 290 #ifdef CONFIG_OF_BOARD_SETUP 291 /* Call the board-specific fixup routine */ 292 ft_board_setup(*of_flat_tree, gd->bd); 293 #endif 294 295 /* Delete the old LMB reservation */ 296 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree, 297 (phys_size_t)fdt_totalsize(*of_flat_tree)); 298 299 ret = fdt_resize(*of_flat_tree); 300 if (ret < 0) 301 return ret; 302 of_size = ret; 303 304 if (*initrd_start && *initrd_end) { 305 of_size += FDT_RAMDISK_OVERHEAD; 306 fdt_set_totalsize(*of_flat_tree, of_size); 307 } 308 /* Create a new LMB reservation */ 309 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size); 310 311 /* fixup the initrd now that we know where it should be */ 312 if (*initrd_start && *initrd_end) 313 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1); 314 315 if (!ft_verify_fdt(*of_flat_tree)) 316 return -1; 317 } 318 #endif /* CONFIG_OF_LIBFDT */ 319 return 0; 320 } 321 322 noinline 323 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 324 { 325 int ret; 326 327 if (flag & BOOTM_STATE_OS_CMDLINE) { 328 boot_cmdline_linux(images); 329 return 0; 330 } 331 332 if (flag & BOOTM_STATE_OS_BD_T) { 333 boot_bd_t_linux(images); 334 return 0; 335 } 336 337 if (flag & BOOTM_STATE_OS_PREP) { 338 boot_prep_linux(images); 339 return 0; 340 } 341 342 if (flag & BOOTM_STATE_OS_GO) { 343 boot_jump_linux(images); 344 return 0; 345 } 346 347 boot_prep_linux(images); 348 ret = boot_body_linux(images); 349 if (ret) 350 return ret; 351 boot_jump_linux(images); 352 353 return 0; 354 } 355 356 static ulong get_sp (void) 357 { 358 ulong sp; 359 360 asm( "mr %0,1": "=r"(sp) : ); 361 return sp; 362 } 363 364 static void set_clocks_in_mhz (bd_t *kbd) 365 { 366 char *s; 367 368 if ((s = getenv ("clocks_in_mhz")) != NULL) { 369 /* convert all clock information to MHz */ 370 kbd->bi_intfreq /= 1000000L; 371 kbd->bi_busfreq /= 1000000L; 372 #if defined(CONFIG_MPC8220) 373 kbd->bi_inpfreq /= 1000000L; 374 kbd->bi_pcifreq /= 1000000L; 375 kbd->bi_pevfreq /= 1000000L; 376 kbd->bi_flbfreq /= 1000000L; 377 kbd->bi_vcofreq /= 1000000L; 378 #endif 379 #if defined(CONFIG_CPM2) 380 kbd->bi_cpmfreq /= 1000000L; 381 kbd->bi_brgfreq /= 1000000L; 382 kbd->bi_sccfreq /= 1000000L; 383 kbd->bi_vco /= 1000000L; 384 #endif 385 #if defined(CONFIG_MPC5xxx) 386 kbd->bi_ipbfreq /= 1000000L; 387 kbd->bi_pcifreq /= 1000000L; 388 #endif /* CONFIG_MPC5xxx */ 389 } 390 } 391