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 #include <asm/arch/rockchip_smccc.h> 37 38 DECLARE_GLOBAL_DATA_PTR; 39 40 static struct tag *params; 41 42 static ulong get_sp(void) 43 { 44 ulong ret; 45 46 asm("mov %0, sp" : "=r"(ret) : ); 47 return ret; 48 } 49 50 void arch_lmb_reserve(struct lmb *lmb) 51 { 52 ulong sp; 53 54 /* 55 * Booting a (Linux) kernel image 56 * 57 * Allocate space for command line and board info - the 58 * address should be as high as possible within the reach of 59 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 60 * memory, which means far enough below the current stack 61 * pointer. 62 */ 63 sp = get_sp(); 64 debug("## Current stack ends at 0x%08lx ", sp); 65 66 /* adjust sp by 4K to be safe */ 67 sp -= 4096; 68 lmb_reserve(lmb, sp, 69 gd->ram_top - sp); 70 } 71 72 __weak void board_quiesce_devices(void *images) 73 { 74 } 75 76 /** 77 * announce_and_cleanup() - Print message and prepare for kernel boot 78 * 79 * @fake: non-zero to do everything except actually boot 80 */ 81 static void announce_and_cleanup(bootm_headers_t *images, int fake) 82 { 83 ulong us; 84 85 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 86 #ifdef CONFIG_BOOTSTAGE_FDT 87 bootstage_fdt_add_report(); 88 #endif 89 #ifdef CONFIG_BOOTSTAGE_REPORT 90 bootstage_report(); 91 #endif 92 93 #ifdef CONFIG_USB_DEVICE 94 udc_disconnect(); 95 #endif 96 97 board_quiesce_devices(images); 98 99 /* Flush all console data */ 100 flushc(); 101 102 /* 103 * Call remove function of all devices with a removal flag set. 104 * This may be useful for last-stage operations, like cancelling 105 * of DMA operation or releasing device internal buffers. 106 */ 107 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); 108 109 cleanup_before_linux(); 110 111 us = (get_ticks() - gd->sys_start_tick) / (COUNTER_FREQUENCY / 1000000); 112 printf("Total: %ld.%ld ms\n", us / 1000, us % 1000); 113 114 printf("\nStarting kernel ...%s\n\n", fake ? 115 "(fake run for tracing)" : ""); 116 } 117 118 static void setup_start_tag (bd_t *bd) 119 { 120 params = (struct tag *)bd->bi_boot_params; 121 122 params->hdr.tag = ATAG_CORE; 123 params->hdr.size = tag_size (tag_core); 124 125 params->u.core.flags = 0; 126 params->u.core.pagesize = 0; 127 params->u.core.rootdev = 0; 128 129 params = tag_next (params); 130 } 131 132 static void setup_memory_tags(bd_t *bd) 133 { 134 int i; 135 136 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 137 params->hdr.tag = ATAG_MEM; 138 params->hdr.size = tag_size (tag_mem32); 139 140 params->u.mem.start = bd->bi_dram[i].start; 141 params->u.mem.size = bd->bi_dram[i].size; 142 143 params = tag_next (params); 144 } 145 } 146 147 static void setup_commandline_tag(bd_t *bd, char *commandline) 148 { 149 char *p; 150 151 if (!commandline) 152 return; 153 154 /* eat leading white space */ 155 for (p = commandline; *p == ' '; p++); 156 157 /* skip non-existent command lines so the kernel will still 158 * use its default command line. 159 */ 160 if (*p == '\0') 161 return; 162 163 params->hdr.tag = ATAG_CMDLINE; 164 params->hdr.size = 165 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2; 166 167 strcpy (params->u.cmdline.cmdline, p); 168 169 params = tag_next (params); 170 } 171 172 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) 173 { 174 /* an ATAG_INITRD node tells the kernel where the compressed 175 * ramdisk can be found. ATAG_RDIMG is a better name, actually. 176 */ 177 params->hdr.tag = ATAG_INITRD2; 178 params->hdr.size = tag_size (tag_initrd); 179 180 params->u.initrd.start = initrd_start; 181 params->u.initrd.size = initrd_end - initrd_start; 182 183 params = tag_next (params); 184 } 185 186 static void setup_serial_tag(struct tag **tmp) 187 { 188 struct tag *params = *tmp; 189 struct tag_serialnr serialnr; 190 191 get_board_serial(&serialnr); 192 params->hdr.tag = ATAG_SERIAL; 193 params->hdr.size = tag_size (tag_serialnr); 194 params->u.serialnr.low = serialnr.low; 195 params->u.serialnr.high= serialnr.high; 196 params = tag_next (params); 197 *tmp = params; 198 } 199 200 static void setup_revision_tag(struct tag **in_params) 201 { 202 u32 rev = 0; 203 204 rev = get_board_rev(); 205 params->hdr.tag = ATAG_REVISION; 206 params->hdr.size = tag_size (tag_revision); 207 params->u.revision.rev = rev; 208 params = tag_next (params); 209 } 210 211 static void setup_end_tag(bd_t *bd) 212 { 213 params->hdr.tag = ATAG_NONE; 214 params->hdr.size = 0; 215 } 216 217 __weak void setup_board_tags(struct tag **in_params) {} 218 219 #ifdef CONFIG_ARM64 220 static void do_nonsec_virt_switch(void) 221 { 222 smp_kick_all_cpus(); 223 dcache_disable(); /* flush cache before swtiching to EL2 */ 224 } 225 #endif 226 227 /* Subcommand: PREP */ 228 static void boot_prep_linux(bootm_headers_t *images) 229 { 230 char *commandline = env_get("bootargs"); 231 232 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { 233 #ifdef CONFIG_OF_LIBFDT 234 debug("using: FDT\n"); 235 if (image_setup_linux(images)) { 236 printf("FDT creation failed! hanging..."); 237 hang(); 238 } 239 #endif 240 } else if (BOOTM_ENABLE_TAGS) { 241 debug("using: ATAGS\n"); 242 setup_start_tag(gd->bd); 243 if (BOOTM_ENABLE_SERIAL_TAG) 244 setup_serial_tag(¶ms); 245 if (BOOTM_ENABLE_CMDLINE_TAG) 246 setup_commandline_tag(gd->bd, commandline); 247 if (BOOTM_ENABLE_REVISION_TAG) 248 setup_revision_tag(¶ms); 249 if (BOOTM_ENABLE_MEMORY_TAGS) 250 setup_memory_tags(gd->bd); 251 if (BOOTM_ENABLE_INITRD_TAG) { 252 /* 253 * In boot_ramdisk_high(), it may relocate ramdisk to 254 * a specified location. And set images->initrd_start & 255 * images->initrd_end to relocated ramdisk's start/end 256 * addresses. So use them instead of images->rd_start & 257 * images->rd_end when possible. 258 */ 259 if (images->initrd_start && images->initrd_end) { 260 setup_initrd_tag(gd->bd, images->initrd_start, 261 images->initrd_end); 262 } else if (images->rd_start && images->rd_end) { 263 setup_initrd_tag(gd->bd, images->rd_start, 264 images->rd_end); 265 } 266 } 267 setup_board_tags(¶ms); 268 setup_end_tag(gd->bd); 269 } else { 270 printf("FDT and ATAGS support not compiled in - hanging\n"); 271 hang(); 272 } 273 } 274 275 __weak bool armv7_boot_nonsec_default(void) 276 { 277 #ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT 278 return false; 279 #else 280 return true; 281 #endif 282 } 283 284 #ifdef CONFIG_ARMV7_NONSEC 285 bool armv7_boot_nonsec(void) 286 { 287 char *s = env_get("bootm_boot_mode"); 288 bool nonsec = armv7_boot_nonsec_default(); 289 290 if (s && !strcmp(s, "sec")) 291 nonsec = false; 292 293 if (s && !strcmp(s, "nonsec")) 294 nonsec = true; 295 296 return nonsec; 297 } 298 #endif 299 300 #ifdef CONFIG_ARM64 301 __weak void update_os_arch_secondary_cores(uint8_t os_arch) 302 { 303 } 304 305 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 306 static void switch_to_el1(void) 307 { 308 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && 309 (images.os.arch == IH_ARCH_ARM)) 310 armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number, 311 (u64)images.ft_addr, 0, 312 (u64)images.ep, 313 ES_TO_AARCH32); 314 else 315 armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0, 316 images.ep, 317 ES_TO_AARCH64); 318 } 319 #endif 320 #endif 321 322 #ifdef CONFIG_ARM64_SWITCH_TO_AARCH32 323 int arm64_switch_aarch32(bootm_headers_t *images) 324 { 325 int es_flag; 326 int ret = 0; 327 328 images->os.arch = IH_ARCH_ARM; 329 330 /* arm aarch32 SVC */ 331 es_flag = PE_STATE(0, 0, 0, 0); 332 ret |= sip_smc_amp_cfg(AMP_PE_STATE, 0x100, es_flag); 333 ret |= sip_smc_amp_cfg(AMP_PE_STATE, 0x200, es_flag); 334 ret |= sip_smc_amp_cfg(AMP_PE_STATE, 0x300, es_flag); 335 if (ret) { 336 printf("ARM64 switch aarch32 SiP call failed, ret=%d\n", ret); 337 return 0; 338 } 339 340 return es_flag; 341 } 342 #endif 343 344 /* Subcommand: GO */ 345 static void boot_jump_linux(bootm_headers_t *images, int flag) 346 { 347 #ifdef CONFIG_ARM64 348 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1, 349 void *res2); 350 int fake = (flag & BOOTM_STATE_OS_FAKE_GO); 351 int es_flag = 0; 352 353 #if defined(CONFIG_AMP) 354 es_flag = arm64_switch_amp_pe(images); 355 #elif defined(CONFIG_ARM64_SWITCH_TO_AARCH32) 356 es_flag = arm64_switch_aarch32(images); 357 #endif 358 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1, 359 void *res2))images->ep; 360 361 debug("## Transferring control to Linux (at address %lx)...\n", 362 (ulong) kernel_entry); 363 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 364 365 announce_and_cleanup(images, fake); 366 367 if (!fake) { 368 #ifdef CONFIG_ARMV8_PSCI 369 armv8_setup_psci(); 370 #endif 371 do_nonsec_virt_switch(); 372 373 update_os_arch_secondary_cores(images->os.arch); 374 375 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 376 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0, 377 (u64)switch_to_el1, ES_TO_AARCH64); 378 #else 379 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && 380 (images->os.arch == IH_ARCH_ARM)) 381 armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number, 382 (u64)images->ft_addr, es_flag, 383 (u64)images->ep, 384 ES_TO_AARCH32); 385 else 386 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, es_flag, 387 images->ep, 388 ES_TO_AARCH64); 389 #endif 390 } 391 #else 392 unsigned long machid = gd->bd->bi_arch_number; 393 char *s; 394 void (*kernel_entry)(int zero, int arch, uint params); 395 unsigned long r2; 396 int fake = (flag & BOOTM_STATE_OS_FAKE_GO); 397 398 kernel_entry = (void (*)(int, int, uint))images->ep; 399 #ifdef CONFIG_CPU_V7M 400 ulong addr = (ulong)kernel_entry | 1; 401 kernel_entry = (void *)addr; 402 #endif 403 s = env_get("machid"); 404 if (s) { 405 if (strict_strtoul(s, 16, &machid) < 0) { 406 debug("strict_strtoul failed!\n"); 407 return; 408 } 409 printf("Using machid 0x%lx from environment\n", machid); 410 } 411 412 debug("## Transferring control to Linux (at address %08lx)" \ 413 "...\n", (ulong) kernel_entry); 414 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 415 announce_and_cleanup(images, fake); 416 417 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) 418 r2 = (unsigned long)images->ft_addr; 419 else 420 r2 = gd->bd->bi_boot_params; 421 422 if (!fake) { 423 #ifdef CONFIG_ARMV7_NONSEC 424 if (armv7_boot_nonsec()) { 425 armv7_init_nonsec(); 426 secure_ram_addr(_do_nonsec_entry)(kernel_entry, 427 0, machid, r2); 428 } else 429 #endif 430 kernel_entry(0, machid, r2); 431 } 432 #endif 433 } 434 435 /* Main Entry point for arm bootm implementation 436 * 437 * Modeled after the powerpc implementation 438 * DIFFERENCE: Instead of calling prep and go at the end 439 * they are called if subcommand is equal 0. 440 */ 441 int do_bootm_linux(int flag, int argc, char * const argv[], 442 bootm_headers_t *images) 443 { 444 /* No need for those on ARM */ 445 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) 446 return -1; 447 448 if (flag & BOOTM_STATE_OS_PREP) { 449 boot_prep_linux(images); 450 return 0; 451 } 452 453 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { 454 boot_jump_linux(images, flag); 455 return 0; 456 } 457 458 boot_prep_linux(images); 459 boot_jump_linux(images, flag); 460 return 0; 461 } 462 463 #if defined(CONFIG_BOOTM_VXWORKS) 464 void boot_prep_vxworks(bootm_headers_t *images) 465 { 466 #if defined(CONFIG_OF_LIBFDT) 467 int off; 468 469 if (images->ft_addr) { 470 off = fdt_path_offset(images->ft_addr, "/memory"); 471 if (off < 0) { 472 if (arch_fixup_fdt(images->ft_addr)) 473 puts("## WARNING: fixup memory failed!\n"); 474 } 475 } 476 #endif 477 cleanup_before_linux(); 478 } 479 void boot_jump_vxworks(bootm_headers_t *images) 480 { 481 /* ARM VxWorks requires device tree physical address to be passed */ 482 ((void (*)(void *))images->ep)(images->ft_addr); 483 } 484 #endif 485