1 /* Copyright (C) 2011 2 * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de> 3 * - Added prep subcommand support 4 * - Reorganized source - modeled after powerpc version 5 * 6 * (C) Copyright 2002 7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 8 * Marius Groeger <mgroeger@sysgo.de> 9 * 10 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) 11 * 12 * SPDX-License-Identifier: GPL-2.0+ 13 */ 14 15 #include <common.h> 16 #include <command.h> 17 #include <amp.h> 18 #include <dm.h> 19 #include <dm/root.h> 20 #include <image.h> 21 #include <u-boot/zlib.h> 22 #include <asm/byteorder.h> 23 #include <linux/libfdt.h> 24 #include <mapmem.h> 25 #include <fdt_support.h> 26 #include <asm/bootm.h> 27 #include <asm/secure.h> 28 #include <linux/compiler.h> 29 #include <bootm.h> 30 #include <vxworks.h> 31 32 #ifdef CONFIG_ARMV7_NONSEC 33 #include <asm/armv7.h> 34 #endif 35 #include <asm/setup.h> 36 37 DECLARE_GLOBAL_DATA_PTR; 38 39 static struct tag *params; 40 41 static ulong get_sp(void) 42 { 43 ulong ret; 44 45 asm("mov %0, sp" : "=r"(ret) : ); 46 return ret; 47 } 48 49 void arch_lmb_reserve(struct lmb *lmb) 50 { 51 ulong sp; 52 53 /* 54 * Booting a (Linux) kernel image 55 * 56 * Allocate space for command line and board info - the 57 * address should be as high as possible within the reach of 58 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 59 * memory, which means far enough below the current stack 60 * pointer. 61 */ 62 sp = get_sp(); 63 debug("## Current stack ends at 0x%08lx ", sp); 64 65 /* adjust sp by 4K to be safe */ 66 sp -= 4096; 67 lmb_reserve(lmb, sp, 68 gd->ram_top - sp); 69 } 70 71 __weak void board_quiesce_devices(void *images) 72 { 73 } 74 75 /** 76 * announce_and_cleanup() - Print message and prepare for kernel boot 77 * 78 * @fake: non-zero to do everything except actually boot 79 */ 80 static void announce_and_cleanup(bootm_headers_t *images, int fake) 81 { 82 ulong us; 83 84 us = (get_ticks() - gd->sys_start_tick) / (COUNTER_FREQUENCY / 1000000); 85 printf("Total: %ld.%ld ms\n", us / 1000, us % 1000); 86 87 printf("\nStarting kernel ...%s\n\n", fake ? 88 "(fake run for tracing)" : ""); 89 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 90 #ifdef CONFIG_BOOTSTAGE_FDT 91 bootstage_fdt_add_report(); 92 #endif 93 #ifdef CONFIG_BOOTSTAGE_REPORT 94 bootstage_report(); 95 #endif 96 97 #ifdef CONFIG_USB_DEVICE 98 udc_disconnect(); 99 #endif 100 101 board_quiesce_devices(images); 102 103 /* Flush all console data */ 104 flushc(); 105 106 /* 107 * Call remove function of all devices with a removal flag set. 108 * This may be useful for last-stage operations, like cancelling 109 * of DMA operation or releasing device internal buffers. 110 */ 111 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); 112 113 cleanup_before_linux(); 114 } 115 116 static void setup_start_tag (bd_t *bd) 117 { 118 params = (struct tag *)bd->bi_boot_params; 119 120 params->hdr.tag = ATAG_CORE; 121 params->hdr.size = tag_size (tag_core); 122 123 params->u.core.flags = 0; 124 params->u.core.pagesize = 0; 125 params->u.core.rootdev = 0; 126 127 params = tag_next (params); 128 } 129 130 static void setup_memory_tags(bd_t *bd) 131 { 132 int i; 133 134 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 135 params->hdr.tag = ATAG_MEM; 136 params->hdr.size = tag_size (tag_mem32); 137 138 params->u.mem.start = bd->bi_dram[i].start; 139 params->u.mem.size = bd->bi_dram[i].size; 140 141 params = tag_next (params); 142 } 143 } 144 145 static void setup_commandline_tag(bd_t *bd, char *commandline) 146 { 147 char *p; 148 149 if (!commandline) 150 return; 151 152 /* eat leading white space */ 153 for (p = commandline; *p == ' '; p++); 154 155 /* skip non-existent command lines so the kernel will still 156 * use its default command line. 157 */ 158 if (*p == '\0') 159 return; 160 161 params->hdr.tag = ATAG_CMDLINE; 162 params->hdr.size = 163 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2; 164 165 strcpy (params->u.cmdline.cmdline, p); 166 167 params = tag_next (params); 168 } 169 170 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) 171 { 172 /* an ATAG_INITRD node tells the kernel where the compressed 173 * ramdisk can be found. ATAG_RDIMG is a better name, actually. 174 */ 175 params->hdr.tag = ATAG_INITRD2; 176 params->hdr.size = tag_size (tag_initrd); 177 178 params->u.initrd.start = initrd_start; 179 params->u.initrd.size = initrd_end - initrd_start; 180 181 params = tag_next (params); 182 } 183 184 static void setup_serial_tag(struct tag **tmp) 185 { 186 struct tag *params = *tmp; 187 struct tag_serialnr serialnr; 188 189 get_board_serial(&serialnr); 190 params->hdr.tag = ATAG_SERIAL; 191 params->hdr.size = tag_size (tag_serialnr); 192 params->u.serialnr.low = serialnr.low; 193 params->u.serialnr.high= serialnr.high; 194 params = tag_next (params); 195 *tmp = params; 196 } 197 198 static void setup_revision_tag(struct tag **in_params) 199 { 200 u32 rev = 0; 201 202 rev = get_board_rev(); 203 params->hdr.tag = ATAG_REVISION; 204 params->hdr.size = tag_size (tag_revision); 205 params->u.revision.rev = rev; 206 params = tag_next (params); 207 } 208 209 static void setup_end_tag(bd_t *bd) 210 { 211 params->hdr.tag = ATAG_NONE; 212 params->hdr.size = 0; 213 } 214 215 __weak void setup_board_tags(struct tag **in_params) {} 216 217 #ifdef CONFIG_ARM64 218 static void do_nonsec_virt_switch(void) 219 { 220 smp_kick_all_cpus(); 221 dcache_disable(); /* flush cache before swtiching to EL2 */ 222 } 223 #endif 224 225 /* Subcommand: PREP */ 226 static void boot_prep_linux(bootm_headers_t *images) 227 { 228 char *commandline = env_get("bootargs"); 229 230 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { 231 #ifdef CONFIG_OF_LIBFDT 232 debug("using: FDT\n"); 233 if (image_setup_linux(images)) { 234 printf("FDT creation failed! hanging..."); 235 hang(); 236 } 237 #endif 238 } else if (BOOTM_ENABLE_TAGS) { 239 debug("using: ATAGS\n"); 240 setup_start_tag(gd->bd); 241 if (BOOTM_ENABLE_SERIAL_TAG) 242 setup_serial_tag(¶ms); 243 if (BOOTM_ENABLE_CMDLINE_TAG) 244 setup_commandline_tag(gd->bd, commandline); 245 if (BOOTM_ENABLE_REVISION_TAG) 246 setup_revision_tag(¶ms); 247 if (BOOTM_ENABLE_MEMORY_TAGS) 248 setup_memory_tags(gd->bd); 249 if (BOOTM_ENABLE_INITRD_TAG) { 250 /* 251 * In boot_ramdisk_high(), it may relocate ramdisk to 252 * a specified location. And set images->initrd_start & 253 * images->initrd_end to relocated ramdisk's start/end 254 * addresses. So use them instead of images->rd_start & 255 * images->rd_end when possible. 256 */ 257 if (images->initrd_start && images->initrd_end) { 258 setup_initrd_tag(gd->bd, images->initrd_start, 259 images->initrd_end); 260 } else if (images->rd_start && images->rd_end) { 261 setup_initrd_tag(gd->bd, images->rd_start, 262 images->rd_end); 263 } 264 } 265 setup_board_tags(¶ms); 266 setup_end_tag(gd->bd); 267 } else { 268 printf("FDT and ATAGS support not compiled in - hanging\n"); 269 hang(); 270 } 271 } 272 273 __weak bool armv7_boot_nonsec_default(void) 274 { 275 #ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT 276 return false; 277 #else 278 return true; 279 #endif 280 } 281 282 #ifdef CONFIG_ARMV7_NONSEC 283 bool armv7_boot_nonsec(void) 284 { 285 char *s = env_get("bootm_boot_mode"); 286 bool nonsec = armv7_boot_nonsec_default(); 287 288 if (s && !strcmp(s, "sec")) 289 nonsec = false; 290 291 if (s && !strcmp(s, "nonsec")) 292 nonsec = true; 293 294 return nonsec; 295 } 296 #endif 297 298 #ifdef CONFIG_ARM64 299 __weak void update_os_arch_secondary_cores(uint8_t os_arch) 300 { 301 } 302 303 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 304 static void switch_to_el1(void) 305 { 306 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && 307 (images.os.arch == IH_ARCH_ARM)) 308 armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number, 309 (u64)images.ft_addr, 0, 310 (u64)images.ep, 311 ES_TO_AARCH32); 312 else 313 armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0, 314 images.ep, 315 ES_TO_AARCH64); 316 } 317 #endif 318 #endif 319 320 /* Subcommand: GO */ 321 static void boot_jump_linux(bootm_headers_t *images, int flag) 322 { 323 #ifdef CONFIG_ARM64 324 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1, 325 void *res2); 326 int fake = (flag & BOOTM_STATE_OS_FAKE_GO); 327 #ifdef CONFIG_AMP 328 int flags = amp_flags(); 329 images->os.arch = amp_os_arch(); 330 #else 331 int flags = 0; 332 #endif 333 334 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1, 335 void *res2))images->ep; 336 337 debug("## Transferring control to Linux (at address %lx)...\n", 338 (ulong) kernel_entry); 339 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 340 341 announce_and_cleanup(images, fake); 342 343 if (!fake) { 344 #ifdef CONFIG_ARMV8_PSCI 345 armv8_setup_psci(); 346 #endif 347 do_nonsec_virt_switch(); 348 349 update_os_arch_secondary_cores(images->os.arch); 350 351 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 352 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0, 353 (u64)switch_to_el1, ES_TO_AARCH64); 354 #else 355 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && 356 (images->os.arch == IH_ARCH_ARM)) 357 armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number, 358 (u64)images->ft_addr, flags, 359 (u64)images->ep, 360 ES_TO_AARCH32); 361 else 362 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, flags, 363 images->ep, 364 ES_TO_AARCH64); 365 #endif 366 } 367 #else 368 unsigned long machid = gd->bd->bi_arch_number; 369 char *s; 370 void (*kernel_entry)(int zero, int arch, uint params); 371 unsigned long r2; 372 int fake = (flag & BOOTM_STATE_OS_FAKE_GO); 373 374 kernel_entry = (void (*)(int, int, uint))images->ep; 375 #ifdef CONFIG_CPU_V7M 376 ulong addr = (ulong)kernel_entry | 1; 377 kernel_entry = (void *)addr; 378 #endif 379 s = env_get("machid"); 380 if (s) { 381 if (strict_strtoul(s, 16, &machid) < 0) { 382 debug("strict_strtoul failed!\n"); 383 return; 384 } 385 printf("Using machid 0x%lx from environment\n", machid); 386 } 387 388 debug("## Transferring control to Linux (at address %08lx)" \ 389 "...\n", (ulong) kernel_entry); 390 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 391 announce_and_cleanup(images, fake); 392 393 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) 394 r2 = (unsigned long)images->ft_addr; 395 else 396 r2 = gd->bd->bi_boot_params; 397 398 if (!fake) { 399 #ifdef CONFIG_ARMV7_NONSEC 400 if (armv7_boot_nonsec()) { 401 armv7_init_nonsec(); 402 secure_ram_addr(_do_nonsec_entry)(kernel_entry, 403 0, machid, r2); 404 } else 405 #endif 406 kernel_entry(0, machid, r2); 407 } 408 #endif 409 } 410 411 /* Main Entry point for arm bootm implementation 412 * 413 * Modeled after the powerpc implementation 414 * DIFFERENCE: Instead of calling prep and go at the end 415 * they are called if subcommand is equal 0. 416 */ 417 int do_bootm_linux(int flag, int argc, char * const argv[], 418 bootm_headers_t *images) 419 { 420 /* No need for those on ARM */ 421 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) 422 return -1; 423 424 if (flag & BOOTM_STATE_OS_PREP) { 425 boot_prep_linux(images); 426 return 0; 427 } 428 429 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { 430 boot_jump_linux(images, flag); 431 return 0; 432 } 433 434 boot_prep_linux(images); 435 boot_jump_linux(images, flag); 436 return 0; 437 } 438 439 #if defined(CONFIG_BOOTM_VXWORKS) 440 void boot_prep_vxworks(bootm_headers_t *images) 441 { 442 #if defined(CONFIG_OF_LIBFDT) 443 int off; 444 445 if (images->ft_addr) { 446 off = fdt_path_offset(images->ft_addr, "/memory"); 447 if (off < 0) { 448 if (arch_fixup_fdt(images->ft_addr)) 449 puts("## WARNING: fixup memory failed!\n"); 450 } 451 } 452 #endif 453 cleanup_before_linux(); 454 } 455 void boot_jump_vxworks(bootm_headers_t *images) 456 { 457 /* ARM VxWorks requires device tree physical address to be passed */ 458 ((void (*)(void *))images->ep)(images->ft_addr); 459 } 460 #endif 461