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