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 <fdt.h> 40 #include <libfdt.h> 41 #include <fdt_support.h> 42 43 #endif 44 45 #ifdef CONFIG_SYS_INIT_RAM_LOCK 46 #include <asm/cache.h> 47 #endif 48 49 DECLARE_GLOBAL_DATA_PTR; 50 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 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 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 debug (" Booting using OF flat tree...\n"); 91 WATCHDOG_RESET (); 92 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC, 93 getenv_bootm_mapsize(), 0, 0); 94 /* does not return */ 95 } else 96 #endif 97 { 98 /* 99 * Linux Kernel Parameters (passing board info data): 100 * r3: ptr to board info data 101 * r4: initrd_start or 0 if no initrd 102 * r5: initrd_end - unused if r4 is 0 103 * r6: Start of command line string 104 * r7: End of command line string 105 * r8: 0 106 * r9: 0 107 */ 108 ulong cmd_start = images->cmdline_start; 109 ulong cmd_end = images->cmdline_end; 110 ulong initrd_start = images->initrd_start; 111 ulong initrd_end = images->initrd_end; 112 bd_t *kbd = images->kbd; 113 114 debug (" Booting using board info...\n"); 115 WATCHDOG_RESET (); 116 (*kernel) (kbd, initrd_start, initrd_end, 117 cmd_start, cmd_end, 0, 0); 118 /* does not return */ 119 } 120 return ; 121 } 122 123 void arch_lmb_reserve(struct lmb *lmb) 124 { 125 phys_size_t bootm_size; 126 ulong size, sp, bootmap_base; 127 128 bootmap_base = getenv_bootm_low(); 129 bootm_size = getenv_bootm_size(); 130 131 #ifdef DEBUG 132 if (((u64)bootmap_base + bootm_size) > 133 (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size)) 134 puts("WARNING: bootm_low + bootm_size exceed total memory\n"); 135 if ((bootmap_base + bootm_size) > get_effective_memsize()) 136 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n"); 137 #endif 138 139 size = min(bootm_size, get_effective_memsize()); 140 size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE); 141 142 if (size < bootm_size) { 143 ulong base = bootmap_base + size; 144 printf("WARNING: adjusting available memory to %lx\n", size); 145 lmb_reserve(lmb, base, bootm_size - size); 146 } 147 148 /* 149 * Booting a (Linux) kernel image 150 * 151 * Allocate space for command line and board info - the 152 * address should be as high as possible within the reach of 153 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 154 * memory, which means far enough below the current stack 155 * pointer. 156 */ 157 sp = get_sp(); 158 debug ("## Current stack ends at 0x%08lx\n", sp); 159 160 /* adjust sp by 4K to be safe */ 161 sp -= 4096; 162 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp)); 163 164 #ifdef CONFIG_MP 165 cpu_mp_lmb_reserve(lmb); 166 #endif 167 168 return ; 169 } 170 171 static void boot_prep_linux(bootm_headers_t *images) 172 { 173 #ifdef CONFIG_MP 174 /* 175 * if we are MP make sure to flush the device tree so any changes are 176 * made visibile to all other cores. In AMP boot scenarios the cores 177 * might not be HW cache coherent with each other. 178 */ 179 flush_cache((unsigned long)images->ft_addr, images->ft_len); 180 #endif 181 } 182 183 static int boot_cmdline_linux(bootm_headers_t *images) 184 { 185 ulong of_size = images->ft_len; 186 struct lmb *lmb = &images->lmb; 187 ulong *cmd_start = &images->cmdline_start; 188 ulong *cmd_end = &images->cmdline_end; 189 190 int ret = 0; 191 192 if (!of_size) { 193 /* allocate space and init command line */ 194 ret = boot_get_cmdline (lmb, cmd_start, cmd_end); 195 if (ret) { 196 puts("ERROR with allocation of cmdline\n"); 197 return ret; 198 } 199 } 200 201 return ret; 202 } 203 204 static int boot_bd_t_linux(bootm_headers_t *images) 205 { 206 ulong of_size = images->ft_len; 207 struct lmb *lmb = &images->lmb; 208 bd_t **kbd = &images->kbd; 209 210 int ret = 0; 211 212 if (!of_size) { 213 /* allocate space for kernel copy of board info */ 214 ret = boot_get_kbd (lmb, kbd); 215 if (ret) { 216 puts("ERROR with allocation of kernel bd\n"); 217 return ret; 218 } 219 set_clocks_in_mhz(*kbd); 220 } 221 222 return ret; 223 } 224 225 /* 226 * Verify the device tree. 227 * 228 * This function is called after all device tree fix-ups have been enacted, 229 * so that the final device tree can be verified. The definition of "verified" 230 * is up to the specific implementation. However, it generally means that the 231 * addresses of some of the devices in the device tree are compared with the 232 * actual addresses at which U-Boot has placed them. 233 * 234 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the 235 * boot process. 236 */ 237 static int __ft_verify_fdt(void *fdt) 238 { 239 return 1; 240 } 241 __attribute__((weak, alias("__ft_verify_fdt"))) int ft_verify_fdt(void *fdt); 242 243 static int boot_body_linux(bootm_headers_t *images) 244 { 245 ulong rd_len; 246 struct lmb *lmb = &images->lmb; 247 ulong *initrd_start = &images->initrd_start; 248 ulong *initrd_end = &images->initrd_end; 249 #if defined(CONFIG_OF_LIBFDT) 250 ulong of_size = images->ft_len; 251 char **of_flat_tree = &images->ft_addr; 252 #endif 253 254 int ret; 255 256 #if defined(CONFIG_OF_LIBFDT) 257 boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree); 258 #endif 259 260 /* allocate space and init command line */ 261 ret = boot_cmdline_linux(images); 262 if (ret) 263 return ret; 264 265 /* allocate space for kernel copy of board info */ 266 ret = boot_bd_t_linux(images); 267 if (ret) 268 return ret; 269 270 rd_len = images->rd_end - images->rd_start; 271 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, initrd_start, initrd_end); 272 if (ret) 273 return ret; 274 275 #if defined(CONFIG_OF_LIBFDT) 276 ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size); 277 if (ret) 278 return ret; 279 280 /* 281 * Add the chosen node if it doesn't exist, add the env and bd_t 282 * if the user wants it (the logic is in the subroutines). 283 */ 284 if (of_size) { 285 if (fdt_chosen(*of_flat_tree, 1) < 0) { 286 puts ("ERROR: "); 287 puts ("/chosen node create failed"); 288 puts (" - must RESET the board to recover.\n"); 289 return -1; 290 } 291 #ifdef CONFIG_OF_BOARD_SETUP 292 /* Call the board-specific fixup routine */ 293 ft_board_setup(*of_flat_tree, gd->bd); 294 #endif 295 296 /* Delete the old LMB reservation */ 297 lmb_free(lmb, (phys_addr_t)(u32)*of_flat_tree, 298 (phys_size_t)fdt_totalsize(*of_flat_tree)); 299 300 ret = fdt_resize(*of_flat_tree); 301 if (ret < 0) 302 return ret; 303 of_size = ret; 304 305 if (*initrd_start && *initrd_end) { 306 of_size += FDT_RAMDISK_OVERHEAD; 307 fdt_set_totalsize(*of_flat_tree, of_size); 308 } 309 /* Create a new LMB reservation */ 310 lmb_reserve(lmb, (ulong)*of_flat_tree, of_size); 311 312 /* fixup the initrd now that we know where it should be */ 313 if (*initrd_start && *initrd_end) 314 fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1); 315 316 if (!ft_verify_fdt(*of_flat_tree)) 317 return -1; 318 } 319 #endif /* CONFIG_OF_LIBFDT */ 320 return 0; 321 } 322 323 noinline 324 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 325 { 326 int ret; 327 328 if (flag & BOOTM_STATE_OS_CMDLINE) { 329 boot_cmdline_linux(images); 330 return 0; 331 } 332 333 if (flag & BOOTM_STATE_OS_BD_T) { 334 boot_bd_t_linux(images); 335 return 0; 336 } 337 338 if (flag & BOOTM_STATE_OS_PREP) { 339 boot_prep_linux(images); 340 return 0; 341 } 342 343 if (flag & BOOTM_STATE_OS_GO) { 344 boot_jump_linux(images); 345 return 0; 346 } 347 348 boot_prep_linux(images); 349 ret = boot_body_linux(images); 350 if (ret) 351 return ret; 352 boot_jump_linux(images); 353 354 return 0; 355 } 356 357 static ulong get_sp (void) 358 { 359 ulong sp; 360 361 asm( "mr %0,1": "=r"(sp) : ); 362 return sp; 363 } 364 365 static void set_clocks_in_mhz (bd_t *kbd) 366 { 367 char *s; 368 369 if ((s = getenv ("clocks_in_mhz")) != NULL) { 370 /* convert all clock information to MHz */ 371 kbd->bi_intfreq /= 1000000L; 372 kbd->bi_busfreq /= 1000000L; 373 #if defined(CONFIG_MPC8220) 374 kbd->bi_inpfreq /= 1000000L; 375 kbd->bi_pcifreq /= 1000000L; 376 kbd->bi_pevfreq /= 1000000L; 377 kbd->bi_flbfreq /= 1000000L; 378 kbd->bi_vcofreq /= 1000000L; 379 #endif 380 #if defined(CONFIG_CPM2) 381 kbd->bi_cpmfreq /= 1000000L; 382 kbd->bi_brgfreq /= 1000000L; 383 kbd->bi_sccfreq /= 1000000L; 384 kbd->bi_vco /= 1000000L; 385 #endif 386 #if defined(CONFIG_MPC5xxx) 387 kbd->bi_ipbfreq /= 1000000L; 388 kbd->bi_pcifreq /= 1000000L; 389 #endif /* CONFIG_MPC5xxx */ 390 } 391 } 392