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 <dm.h> 18 #include <dm/root.h> 19 #include <image.h> 20 #include <u-boot/zlib.h> 21 #include <asm/byteorder.h> 22 #include <linux/libfdt.h> 23 #include <mapmem.h> 24 #include <fdt_support.h> 25 #include <asm/bootm.h> 26 #include <asm/secure.h> 27 #include <linux/compiler.h> 28 #include <bootm.h> 29 #include <vxworks.h> 30 31 #ifdef CONFIG_ARMV7_NONSEC 32 #include <asm/armv7.h> 33 #endif 34 #include <asm/setup.h> 35 36 DECLARE_GLOBAL_DATA_PTR; 37 38 static struct tag *params; 39 40 static ulong get_sp(void) 41 { 42 ulong ret; 43 44 asm("mov %0, sp" : "=r"(ret) : ); 45 return ret; 46 } 47 48 void arch_lmb_reserve(struct lmb *lmb) 49 { 50 ulong sp; 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 lmb_reserve(lmb, sp, 67 gd->ram_top - sp); 68 } 69 70 __weak void board_quiesce_devices(void) 71 { 72 } 73 74 /** 75 * announce_and_cleanup() - Print message and prepare for kernel boot 76 * 77 * @fake: non-zero to do everything except actually boot 78 */ 79 static void announce_and_cleanup(int fake) 80 { 81 ulong us; 82 83 us = (get_ticks() - gd->sys_start_tick) / (COUNTER_FREQUENCY / 1000000); 84 printf("Total: %ld.%ld ms\n", us / 1000, us % 1000); 85 86 printf("\nStarting kernel ...%s\n\n", fake ? 87 "(fake run for tracing)" : ""); 88 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 89 #ifdef CONFIG_BOOTSTAGE_FDT 90 bootstage_fdt_add_report(); 91 #endif 92 #ifdef CONFIG_BOOTSTAGE_REPORT 93 bootstage_report(); 94 #endif 95 96 #ifdef CONFIG_USB_DEVICE 97 udc_disconnect(); 98 #endif 99 100 #ifdef CONFIG_ARCH_ROCKCHIP 101 /* Enable this flag, call putc to flush console(ns16550_serial_putc)*/ 102 gd->flags |= GD_FLG_OS_RUN; 103 /* 104 * This putc is only for calling ns16550_serial_putc() to flush console. 105 * Console uclass framework is quite complicated, it's not easy to 106 * flush console by privoding a new interface which must provide a 107 * udevice here, so we use an easy way to achieve that. 108 */ 109 putc('\n'); 110 #endif 111 112 board_quiesce_devices(); 113 114 /* 115 * Call remove function of all devices with a removal flag set. 116 * This may be useful for last-stage operations, like cancelling 117 * of DMA operation or releasing device internal buffers. 118 */ 119 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); 120 121 cleanup_before_linux(); 122 } 123 124 static void setup_start_tag (bd_t *bd) 125 { 126 params = (struct tag *)bd->bi_boot_params; 127 128 params->hdr.tag = ATAG_CORE; 129 params->hdr.size = tag_size (tag_core); 130 131 params->u.core.flags = 0; 132 params->u.core.pagesize = 0; 133 params->u.core.rootdev = 0; 134 135 params = tag_next (params); 136 } 137 138 static void setup_memory_tags(bd_t *bd) 139 { 140 int i; 141 142 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 143 params->hdr.tag = ATAG_MEM; 144 params->hdr.size = tag_size (tag_mem32); 145 146 params->u.mem.start = bd->bi_dram[i].start; 147 params->u.mem.size = bd->bi_dram[i].size; 148 149 params = tag_next (params); 150 } 151 } 152 153 static void setup_commandline_tag(bd_t *bd, char *commandline) 154 { 155 char *p; 156 157 if (!commandline) 158 return; 159 160 /* eat leading white space */ 161 for (p = commandline; *p == ' '; p++); 162 163 /* skip non-existent command lines so the kernel will still 164 * use its default command line. 165 */ 166 if (*p == '\0') 167 return; 168 169 params->hdr.tag = ATAG_CMDLINE; 170 params->hdr.size = 171 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2; 172 173 strcpy (params->u.cmdline.cmdline, p); 174 175 params = tag_next (params); 176 } 177 178 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) 179 { 180 /* an ATAG_INITRD node tells the kernel where the compressed 181 * ramdisk can be found. ATAG_RDIMG is a better name, actually. 182 */ 183 params->hdr.tag = ATAG_INITRD2; 184 params->hdr.size = tag_size (tag_initrd); 185 186 params->u.initrd.start = initrd_start; 187 params->u.initrd.size = initrd_end - initrd_start; 188 189 params = tag_next (params); 190 } 191 192 static void setup_serial_tag(struct tag **tmp) 193 { 194 struct tag *params = *tmp; 195 struct tag_serialnr serialnr; 196 197 get_board_serial(&serialnr); 198 params->hdr.tag = ATAG_SERIAL; 199 params->hdr.size = tag_size (tag_serialnr); 200 params->u.serialnr.low = serialnr.low; 201 params->u.serialnr.high= serialnr.high; 202 params = tag_next (params); 203 *tmp = params; 204 } 205 206 static void setup_revision_tag(struct tag **in_params) 207 { 208 u32 rev = 0; 209 210 rev = get_board_rev(); 211 params->hdr.tag = ATAG_REVISION; 212 params->hdr.size = tag_size (tag_revision); 213 params->u.revision.rev = rev; 214 params = tag_next (params); 215 } 216 217 static void setup_end_tag(bd_t *bd) 218 { 219 params->hdr.tag = ATAG_NONE; 220 params->hdr.size = 0; 221 } 222 223 __weak void setup_board_tags(struct tag **in_params) {} 224 225 #ifdef CONFIG_ARM64 226 static void do_nonsec_virt_switch(void) 227 { 228 smp_kick_all_cpus(); 229 dcache_disable(); /* flush cache before swtiching to EL2 */ 230 } 231 #endif 232 233 /* Subcommand: PREP */ 234 static void boot_prep_linux(bootm_headers_t *images) 235 { 236 char *commandline = env_get("bootargs"); 237 238 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { 239 #ifdef CONFIG_OF_LIBFDT 240 debug("using: FDT\n"); 241 if (image_setup_linux(images)) { 242 printf("FDT creation failed! hanging..."); 243 hang(); 244 } 245 #endif 246 } else if (BOOTM_ENABLE_TAGS) { 247 debug("using: ATAGS\n"); 248 setup_start_tag(gd->bd); 249 if (BOOTM_ENABLE_SERIAL_TAG) 250 setup_serial_tag(¶ms); 251 if (BOOTM_ENABLE_CMDLINE_TAG) 252 setup_commandline_tag(gd->bd, commandline); 253 if (BOOTM_ENABLE_REVISION_TAG) 254 setup_revision_tag(¶ms); 255 if (BOOTM_ENABLE_MEMORY_TAGS) 256 setup_memory_tags(gd->bd); 257 if (BOOTM_ENABLE_INITRD_TAG) { 258 /* 259 * In boot_ramdisk_high(), it may relocate ramdisk to 260 * a specified location. And set images->initrd_start & 261 * images->initrd_end to relocated ramdisk's start/end 262 * addresses. So use them instead of images->rd_start & 263 * images->rd_end when possible. 264 */ 265 if (images->initrd_start && images->initrd_end) { 266 setup_initrd_tag(gd->bd, images->initrd_start, 267 images->initrd_end); 268 } else if (images->rd_start && images->rd_end) { 269 setup_initrd_tag(gd->bd, images->rd_start, 270 images->rd_end); 271 } 272 } 273 setup_board_tags(¶ms); 274 setup_end_tag(gd->bd); 275 } else { 276 printf("FDT and ATAGS support not compiled in - hanging\n"); 277 hang(); 278 } 279 } 280 281 __weak bool armv7_boot_nonsec_default(void) 282 { 283 #ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT 284 return false; 285 #else 286 return true; 287 #endif 288 } 289 290 #ifdef CONFIG_ARMV7_NONSEC 291 bool armv7_boot_nonsec(void) 292 { 293 char *s = env_get("bootm_boot_mode"); 294 bool nonsec = armv7_boot_nonsec_default(); 295 296 if (s && !strcmp(s, "sec")) 297 nonsec = false; 298 299 if (s && !strcmp(s, "nonsec")) 300 nonsec = true; 301 302 return nonsec; 303 } 304 #endif 305 306 #ifdef CONFIG_ARM64 307 __weak void update_os_arch_secondary_cores(uint8_t os_arch) 308 { 309 } 310 311 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 312 static void switch_to_el1(void) 313 { 314 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && 315 (images.os.arch == IH_ARCH_ARM)) 316 armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number, 317 (u64)images.ft_addr, 0, 318 (u64)images.ep, 319 ES_TO_AARCH32); 320 else 321 armv8_switch_to_el1((u64)images.ft_addr, 0, 0, 0, 322 images.ep, 323 ES_TO_AARCH64); 324 } 325 #endif 326 #endif 327 328 /* Subcommand: GO */ 329 static void boot_jump_linux(bootm_headers_t *images, int flag) 330 { 331 #ifdef CONFIG_ARM64 332 void (*kernel_entry)(void *fdt_addr, void *res0, void *res1, 333 void *res2); 334 int fake = (flag & BOOTM_STATE_OS_FAKE_GO); 335 336 kernel_entry = (void (*)(void *fdt_addr, void *res0, void *res1, 337 void *res2))images->ep; 338 339 debug("## Transferring control to Linux (at address %lx)...\n", 340 (ulong) kernel_entry); 341 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 342 343 announce_and_cleanup(fake); 344 345 if (!fake) { 346 #ifdef CONFIG_ARMV8_PSCI 347 armv8_setup_psci(); 348 #endif 349 do_nonsec_virt_switch(); 350 351 update_os_arch_secondary_cores(images->os.arch); 352 353 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 354 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0, 355 (u64)switch_to_el1, ES_TO_AARCH64); 356 #else 357 if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && 358 (images->os.arch == IH_ARCH_ARM)) 359 armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number, 360 (u64)images->ft_addr, 0, 361 (u64)images->ep, 362 ES_TO_AARCH32); 363 else 364 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0, 365 images->ep, 366 ES_TO_AARCH64); 367 #endif 368 } 369 #else 370 unsigned long machid = gd->bd->bi_arch_number; 371 char *s; 372 void (*kernel_entry)(int zero, int arch, uint params); 373 unsigned long r2; 374 int fake = (flag & BOOTM_STATE_OS_FAKE_GO); 375 376 kernel_entry = (void (*)(int, int, uint))images->ep; 377 #ifdef CONFIG_CPU_V7M 378 ulong addr = (ulong)kernel_entry | 1; 379 kernel_entry = (void *)addr; 380 #endif 381 s = env_get("machid"); 382 if (s) { 383 if (strict_strtoul(s, 16, &machid) < 0) { 384 debug("strict_strtoul failed!\n"); 385 return; 386 } 387 printf("Using machid 0x%lx from environment\n", machid); 388 } 389 390 debug("## Transferring control to Linux (at address %08lx)" \ 391 "...\n", (ulong) kernel_entry); 392 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 393 announce_and_cleanup(fake); 394 395 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) 396 r2 = (unsigned long)images->ft_addr; 397 else 398 r2 = gd->bd->bi_boot_params; 399 400 if (!fake) { 401 #ifdef CONFIG_ARMV7_NONSEC 402 if (armv7_boot_nonsec()) { 403 armv7_init_nonsec(); 404 secure_ram_addr(_do_nonsec_entry)(kernel_entry, 405 0, machid, r2); 406 } else 407 #endif 408 kernel_entry(0, machid, r2); 409 } 410 #endif 411 } 412 413 /* Main Entry point for arm bootm implementation 414 * 415 * Modeled after the powerpc implementation 416 * DIFFERENCE: Instead of calling prep and go at the end 417 * they are called if subcommand is equal 0. 418 */ 419 int do_bootm_linux(int flag, int argc, char * const argv[], 420 bootm_headers_t *images) 421 { 422 /* No need for those on ARM */ 423 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) 424 return -1; 425 426 if (flag & BOOTM_STATE_OS_PREP) { 427 boot_prep_linux(images); 428 return 0; 429 } 430 431 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { 432 boot_jump_linux(images, flag); 433 return 0; 434 } 435 436 boot_prep_linux(images); 437 boot_jump_linux(images, flag); 438 return 0; 439 } 440 441 #if defined(CONFIG_BOOTM_VXWORKS) 442 void boot_prep_vxworks(bootm_headers_t *images) 443 { 444 #if defined(CONFIG_OF_LIBFDT) 445 int off; 446 447 if (images->ft_addr) { 448 off = fdt_path_offset(images->ft_addr, "/memory"); 449 if (off < 0) { 450 if (arch_fixup_fdt(images->ft_addr)) 451 puts("## WARNING: fixup memory failed!\n"); 452 } 453 } 454 #endif 455 cleanup_before_linux(); 456 } 457 void boot_jump_vxworks(bootm_headers_t *images) 458 { 459 /* ARM VxWorks requires device tree physical address to be passed */ 460 ((void (*)(void *))images->ep)(images->ft_addr); 461 } 462 #endif 463