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