Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 1 | /* |
| 2 | * Xtensa SMP support functions. |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file "COPYING" in the main directory of this archive |
| 6 | * for more details. |
| 7 | * |
| 8 | * Copyright (C) 2008 - 2013 Tensilica Inc. |
| 9 | * |
| 10 | * Chris Zankel <chris@zankel.net> |
| 11 | * Joe Taylor <joe@tensilica.com> |
| 12 | * Pete Delaney <piet@tensilica.com |
| 13 | */ |
| 14 | |
| 15 | #include <linux/cpu.h> |
| 16 | #include <linux/cpumask.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/irqdomain.h> |
| 21 | #include <linux/irq.h> |
| 22 | #include <linux/kdebug.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/reboot.h> |
| 25 | #include <linux/seq_file.h> |
| 26 | #include <linux/smp.h> |
| 27 | #include <linux/thread_info.h> |
| 28 | |
| 29 | #include <asm/cacheflush.h> |
| 30 | #include <asm/kdebug.h> |
| 31 | #include <asm/mmu_context.h> |
| 32 | #include <asm/mxregs.h> |
| 33 | #include <asm/platform.h> |
| 34 | #include <asm/tlbflush.h> |
| 35 | #include <asm/traps.h> |
| 36 | |
| 37 | #ifdef CONFIG_SMP |
| 38 | # if XCHAL_HAVE_S32C1I == 0 |
| 39 | # error "The S32C1I option is required for SMP." |
| 40 | # endif |
| 41 | #endif |
| 42 | |
Max Filippov | 49b424f | 2013-10-17 02:42:28 +0400 | [diff] [blame] | 43 | static void system_invalidate_dcache_range(unsigned long start, |
| 44 | unsigned long size); |
| 45 | static void system_flush_invalidate_dcache_range(unsigned long start, |
| 46 | unsigned long size); |
| 47 | |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 48 | /* IPI (Inter Process Interrupt) */ |
| 49 | |
| 50 | #define IPI_IRQ 0 |
| 51 | |
| 52 | static irqreturn_t ipi_interrupt(int irq, void *dev_id); |
| 53 | static struct irqaction ipi_irqaction = { |
| 54 | .handler = ipi_interrupt, |
| 55 | .flags = IRQF_PERCPU, |
| 56 | .name = "ipi", |
| 57 | }; |
| 58 | |
| 59 | void ipi_init(void) |
| 60 | { |
| 61 | unsigned irq = irq_create_mapping(NULL, IPI_IRQ); |
| 62 | setup_irq(irq, &ipi_irqaction); |
| 63 | } |
| 64 | |
| 65 | static inline unsigned int get_core_count(void) |
| 66 | { |
| 67 | /* Bits 18..21 of SYSCFGID contain the core count minus 1. */ |
| 68 | unsigned int syscfgid = get_er(SYSCFGID); |
| 69 | return ((syscfgid >> 18) & 0xf) + 1; |
| 70 | } |
| 71 | |
| 72 | static inline int get_core_id(void) |
| 73 | { |
| 74 | /* Bits 0...18 of SYSCFGID contain the core id */ |
| 75 | unsigned int core_id = get_er(SYSCFGID); |
| 76 | return core_id & 0x3fff; |
| 77 | } |
| 78 | |
| 79 | void __init smp_prepare_cpus(unsigned int max_cpus) |
| 80 | { |
| 81 | unsigned i; |
| 82 | |
| 83 | for (i = 0; i < max_cpus; ++i) |
| 84 | set_cpu_present(i, true); |
| 85 | } |
| 86 | |
| 87 | void __init smp_init_cpus(void) |
| 88 | { |
| 89 | unsigned i; |
| 90 | unsigned int ncpus = get_core_count(); |
| 91 | unsigned int core_id = get_core_id(); |
| 92 | |
| 93 | pr_info("%s: Core Count = %d\n", __func__, ncpus); |
| 94 | pr_info("%s: Core Id = %d\n", __func__, core_id); |
| 95 | |
| 96 | for (i = 0; i < ncpus; ++i) |
| 97 | set_cpu_possible(i, true); |
| 98 | } |
| 99 | |
| 100 | void __init smp_prepare_boot_cpu(void) |
| 101 | { |
| 102 | unsigned int cpu = smp_processor_id(); |
| 103 | BUG_ON(cpu != 0); |
| 104 | cpu_asid_cache(cpu) = ASID_USER_FIRST; |
| 105 | } |
| 106 | |
| 107 | void __init smp_cpus_done(unsigned int max_cpus) |
| 108 | { |
| 109 | } |
| 110 | |
| 111 | static int boot_secondary_processors = 1; /* Set with xt-gdb via .xt-gdb */ |
| 112 | static DECLARE_COMPLETION(cpu_running); |
| 113 | |
Max Filippov | 49b424f | 2013-10-17 02:42:28 +0400 | [diff] [blame] | 114 | void secondary_start_kernel(void) |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 115 | { |
| 116 | struct mm_struct *mm = &init_mm; |
| 117 | unsigned int cpu = smp_processor_id(); |
| 118 | |
| 119 | init_mmu(); |
| 120 | |
| 121 | #ifdef CONFIG_DEBUG_KERNEL |
| 122 | if (boot_secondary_processors == 0) { |
| 123 | pr_debug("%s: boot_secondary_processors:%d; Hanging cpu:%d\n", |
| 124 | __func__, boot_secondary_processors, cpu); |
| 125 | for (;;) |
| 126 | __asm__ __volatile__ ("waiti " __stringify(LOCKLEVEL)); |
| 127 | } |
| 128 | |
| 129 | pr_debug("%s: boot_secondary_processors:%d; Booting cpu:%d\n", |
| 130 | __func__, boot_secondary_processors, cpu); |
| 131 | #endif |
| 132 | /* Init EXCSAVE1 */ |
| 133 | |
| 134 | secondary_trap_init(); |
| 135 | |
| 136 | /* All kernel threads share the same mm context. */ |
| 137 | |
| 138 | atomic_inc(&mm->mm_users); |
| 139 | atomic_inc(&mm->mm_count); |
| 140 | current->active_mm = mm; |
| 141 | cpumask_set_cpu(cpu, mm_cpumask(mm)); |
| 142 | enter_lazy_tlb(mm, current); |
| 143 | |
| 144 | preempt_disable(); |
| 145 | trace_hardirqs_off(); |
| 146 | |
| 147 | calibrate_delay(); |
| 148 | |
| 149 | notify_cpu_starting(cpu); |
| 150 | |
| 151 | secondary_init_irq(); |
| 152 | local_timer_setup(cpu); |
| 153 | |
Kirill Tkhai | abf0ea6 | 2013-12-12 17:41:01 +0400 | [diff] [blame] | 154 | set_cpu_online(cpu, true); |
| 155 | |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 156 | local_irq_enable(); |
| 157 | |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 158 | complete(&cpu_running); |
| 159 | |
| 160 | cpu_startup_entry(CPUHP_ONLINE); |
| 161 | } |
| 162 | |
| 163 | static void mx_cpu_start(void *p) |
| 164 | { |
| 165 | unsigned cpu = (unsigned)p; |
| 166 | unsigned long run_stall_mask = get_er(MPSCORE); |
| 167 | |
| 168 | set_er(run_stall_mask & ~(1u << cpu), MPSCORE); |
| 169 | pr_debug("%s: cpu: %d, run_stall_mask: %lx ---> %lx\n", |
| 170 | __func__, cpu, run_stall_mask, get_er(MPSCORE)); |
| 171 | } |
| 172 | |
| 173 | static void mx_cpu_stop(void *p) |
| 174 | { |
| 175 | unsigned cpu = (unsigned)p; |
| 176 | unsigned long run_stall_mask = get_er(MPSCORE); |
| 177 | |
| 178 | set_er(run_stall_mask | (1u << cpu), MPSCORE); |
| 179 | pr_debug("%s: cpu: %d, run_stall_mask: %lx ---> %lx\n", |
| 180 | __func__, cpu, run_stall_mask, get_er(MPSCORE)); |
| 181 | } |
| 182 | |
Max Filippov | 49b424f | 2013-10-17 02:42:28 +0400 | [diff] [blame] | 183 | #ifdef CONFIG_HOTPLUG_CPU |
| 184 | unsigned long cpu_start_id __cacheline_aligned; |
| 185 | #endif |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 186 | unsigned long cpu_start_ccount; |
| 187 | |
| 188 | static int boot_secondary(unsigned int cpu, struct task_struct *ts) |
| 189 | { |
| 190 | unsigned long timeout = jiffies + msecs_to_jiffies(1000); |
| 191 | unsigned long ccount; |
| 192 | int i; |
| 193 | |
Max Filippov | 49b424f | 2013-10-17 02:42:28 +0400 | [diff] [blame] | 194 | #ifdef CONFIG_HOTPLUG_CPU |
| 195 | cpu_start_id = cpu; |
| 196 | system_flush_invalidate_dcache_range( |
| 197 | (unsigned long)&cpu_start_id, sizeof(cpu_start_id)); |
| 198 | #endif |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 199 | smp_call_function_single(0, mx_cpu_start, (void *)cpu, 1); |
| 200 | |
| 201 | for (i = 0; i < 2; ++i) { |
| 202 | do |
| 203 | ccount = get_ccount(); |
| 204 | while (!ccount); |
| 205 | |
| 206 | cpu_start_ccount = ccount; |
| 207 | |
| 208 | while (time_before(jiffies, timeout)) { |
| 209 | mb(); |
| 210 | if (!cpu_start_ccount) |
| 211 | break; |
| 212 | } |
| 213 | |
| 214 | if (cpu_start_ccount) { |
| 215 | smp_call_function_single(0, mx_cpu_stop, |
| 216 | (void *)cpu, 1); |
| 217 | cpu_start_ccount = 0; |
| 218 | return -EIO; |
| 219 | } |
| 220 | } |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | int __cpu_up(unsigned int cpu, struct task_struct *idle) |
| 225 | { |
| 226 | int ret = 0; |
| 227 | |
| 228 | if (cpu_asid_cache(cpu) == 0) |
| 229 | cpu_asid_cache(cpu) = ASID_USER_FIRST; |
| 230 | |
| 231 | start_info.stack = (unsigned long)task_pt_regs(idle); |
| 232 | wmb(); |
| 233 | |
| 234 | pr_debug("%s: Calling wakeup_secondary(cpu:%d, idle:%p, sp: %08lx)\n", |
| 235 | __func__, cpu, idle, start_info.stack); |
| 236 | |
| 237 | ret = boot_secondary(cpu, idle); |
| 238 | if (ret == 0) { |
| 239 | wait_for_completion_timeout(&cpu_running, |
| 240 | msecs_to_jiffies(1000)); |
| 241 | if (!cpu_online(cpu)) |
| 242 | ret = -EIO; |
| 243 | } |
| 244 | |
| 245 | if (ret) |
| 246 | pr_err("CPU %u failed to boot\n", cpu); |
| 247 | |
| 248 | return ret; |
| 249 | } |
| 250 | |
Max Filippov | 49b424f | 2013-10-17 02:42:28 +0400 | [diff] [blame] | 251 | #ifdef CONFIG_HOTPLUG_CPU |
| 252 | |
| 253 | /* |
| 254 | * __cpu_disable runs on the processor to be shutdown. |
| 255 | */ |
| 256 | int __cpu_disable(void) |
| 257 | { |
| 258 | unsigned int cpu = smp_processor_id(); |
| 259 | |
| 260 | /* |
| 261 | * Take this CPU offline. Once we clear this, we can't return, |
| 262 | * and we must not schedule until we're ready to give up the cpu. |
| 263 | */ |
| 264 | set_cpu_online(cpu, false); |
| 265 | |
| 266 | /* |
| 267 | * OK - migrate IRQs away from this CPU |
| 268 | */ |
| 269 | migrate_irqs(); |
| 270 | |
| 271 | /* |
| 272 | * Flush user cache and TLB mappings, and then remove this CPU |
| 273 | * from the vm mask set of all processes. |
| 274 | */ |
| 275 | local_flush_cache_all(); |
| 276 | local_flush_tlb_all(); |
| 277 | invalidate_page_directory(); |
| 278 | |
| 279 | clear_tasks_mm_cpumask(cpu); |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static void platform_cpu_kill(unsigned int cpu) |
| 285 | { |
| 286 | smp_call_function_single(0, mx_cpu_stop, (void *)cpu, true); |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | * called on the thread which is asking for a CPU to be shutdown - |
| 291 | * waits until shutdown has completed, or it is timed out. |
| 292 | */ |
| 293 | void __cpu_die(unsigned int cpu) |
| 294 | { |
| 295 | unsigned long timeout = jiffies + msecs_to_jiffies(1000); |
| 296 | while (time_before(jiffies, timeout)) { |
| 297 | system_invalidate_dcache_range((unsigned long)&cpu_start_id, |
| 298 | sizeof(cpu_start_id)); |
| 299 | if (cpu_start_id == -cpu) { |
| 300 | platform_cpu_kill(cpu); |
| 301 | return; |
| 302 | } |
| 303 | } |
| 304 | pr_err("CPU%u: unable to kill\n", cpu); |
| 305 | } |
| 306 | |
| 307 | void arch_cpu_idle_dead(void) |
| 308 | { |
| 309 | cpu_die(); |
| 310 | } |
| 311 | /* |
| 312 | * Called from the idle thread for the CPU which has been shutdown. |
| 313 | * |
| 314 | * Note that we disable IRQs here, but do not re-enable them |
| 315 | * before returning to the caller. This is also the behaviour |
| 316 | * of the other hotplug-cpu capable cores, so presumably coming |
| 317 | * out of idle fixes this. |
| 318 | */ |
| 319 | void __ref cpu_die(void) |
| 320 | { |
| 321 | idle_task_exit(); |
| 322 | local_irq_disable(); |
| 323 | __asm__ __volatile__( |
| 324 | " movi a2, cpu_restart\n" |
| 325 | " jx a2\n"); |
| 326 | } |
| 327 | |
| 328 | #endif /* CONFIG_HOTPLUG_CPU */ |
| 329 | |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 330 | enum ipi_msg_type { |
| 331 | IPI_RESCHEDULE = 0, |
| 332 | IPI_CALL_FUNC, |
| 333 | IPI_CPU_STOP, |
| 334 | IPI_MAX |
| 335 | }; |
| 336 | |
| 337 | static const struct { |
| 338 | const char *short_text; |
| 339 | const char *long_text; |
| 340 | } ipi_text[] = { |
| 341 | { .short_text = "RES", .long_text = "Rescheduling interrupts" }, |
| 342 | { .short_text = "CAL", .long_text = "Function call interrupts" }, |
| 343 | { .short_text = "DIE", .long_text = "CPU shutdown interrupts" }, |
| 344 | }; |
| 345 | |
| 346 | struct ipi_data { |
| 347 | unsigned long ipi_count[IPI_MAX]; |
| 348 | }; |
| 349 | |
| 350 | static DEFINE_PER_CPU(struct ipi_data, ipi_data); |
| 351 | |
| 352 | static void send_ipi_message(const struct cpumask *callmask, |
| 353 | enum ipi_msg_type msg_id) |
| 354 | { |
| 355 | int index; |
| 356 | unsigned long mask = 0; |
| 357 | |
| 358 | for_each_cpu(index, callmask) |
| 359 | if (index != smp_processor_id()) |
| 360 | mask |= 1 << index; |
| 361 | |
| 362 | set_er(mask, MIPISET(msg_id)); |
| 363 | } |
| 364 | |
| 365 | void arch_send_call_function_ipi_mask(const struct cpumask *mask) |
| 366 | { |
| 367 | send_ipi_message(mask, IPI_CALL_FUNC); |
| 368 | } |
| 369 | |
| 370 | void arch_send_call_function_single_ipi(int cpu) |
| 371 | { |
| 372 | send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC); |
| 373 | } |
| 374 | |
| 375 | void smp_send_reschedule(int cpu) |
| 376 | { |
| 377 | send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE); |
| 378 | } |
| 379 | |
| 380 | void smp_send_stop(void) |
| 381 | { |
| 382 | struct cpumask targets; |
| 383 | |
| 384 | cpumask_copy(&targets, cpu_online_mask); |
| 385 | cpumask_clear_cpu(smp_processor_id(), &targets); |
| 386 | send_ipi_message(&targets, IPI_CPU_STOP); |
| 387 | } |
| 388 | |
| 389 | static void ipi_cpu_stop(unsigned int cpu) |
| 390 | { |
| 391 | set_cpu_online(cpu, false); |
| 392 | machine_halt(); |
| 393 | } |
| 394 | |
| 395 | irqreturn_t ipi_interrupt(int irq, void *dev_id) |
| 396 | { |
| 397 | unsigned int cpu = smp_processor_id(); |
| 398 | struct ipi_data *ipi = &per_cpu(ipi_data, cpu); |
| 399 | unsigned int msg; |
| 400 | unsigned i; |
| 401 | |
| 402 | msg = get_er(MIPICAUSE(cpu)); |
| 403 | for (i = 0; i < IPI_MAX; i++) |
| 404 | if (msg & (1 << i)) { |
| 405 | set_er(1 << i, MIPICAUSE(cpu)); |
| 406 | ++ipi->ipi_count[i]; |
| 407 | } |
| 408 | |
| 409 | if (msg & (1 << IPI_RESCHEDULE)) |
| 410 | scheduler_ipi(); |
| 411 | if (msg & (1 << IPI_CALL_FUNC)) |
| 412 | generic_smp_call_function_interrupt(); |
| 413 | if (msg & (1 << IPI_CPU_STOP)) |
| 414 | ipi_cpu_stop(cpu); |
| 415 | |
| 416 | return IRQ_HANDLED; |
| 417 | } |
| 418 | |
| 419 | void show_ipi_list(struct seq_file *p, int prec) |
| 420 | { |
| 421 | unsigned int cpu; |
| 422 | unsigned i; |
| 423 | |
| 424 | for (i = 0; i < IPI_MAX; ++i) { |
| 425 | seq_printf(p, "%*s:", prec, ipi_text[i].short_text); |
| 426 | for_each_online_cpu(cpu) |
| 427 | seq_printf(p, " %10lu", |
| 428 | per_cpu(ipi_data, cpu).ipi_count[i]); |
| 429 | seq_printf(p, " %s\n", ipi_text[i].long_text); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | int setup_profiling_timer(unsigned int multiplier) |
| 434 | { |
| 435 | pr_debug("setup_profiling_timer %d\n", multiplier); |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | /* TLB flush functions */ |
| 440 | |
| 441 | struct flush_data { |
| 442 | struct vm_area_struct *vma; |
| 443 | unsigned long addr1; |
| 444 | unsigned long addr2; |
| 445 | }; |
| 446 | |
| 447 | static void ipi_flush_tlb_all(void *arg) |
| 448 | { |
| 449 | local_flush_tlb_all(); |
| 450 | } |
| 451 | |
| 452 | void flush_tlb_all(void) |
| 453 | { |
| 454 | on_each_cpu(ipi_flush_tlb_all, NULL, 1); |
| 455 | } |
| 456 | |
| 457 | static void ipi_flush_tlb_mm(void *arg) |
| 458 | { |
| 459 | local_flush_tlb_mm(arg); |
| 460 | } |
| 461 | |
| 462 | void flush_tlb_mm(struct mm_struct *mm) |
| 463 | { |
| 464 | on_each_cpu(ipi_flush_tlb_mm, mm, 1); |
| 465 | } |
| 466 | |
| 467 | static void ipi_flush_tlb_page(void *arg) |
| 468 | { |
| 469 | struct flush_data *fd = arg; |
| 470 | local_flush_tlb_page(fd->vma, fd->addr1); |
| 471 | } |
| 472 | |
| 473 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) |
| 474 | { |
| 475 | struct flush_data fd = { |
| 476 | .vma = vma, |
| 477 | .addr1 = addr, |
| 478 | }; |
| 479 | on_each_cpu(ipi_flush_tlb_page, &fd, 1); |
| 480 | } |
| 481 | |
| 482 | static void ipi_flush_tlb_range(void *arg) |
| 483 | { |
| 484 | struct flush_data *fd = arg; |
| 485 | local_flush_tlb_range(fd->vma, fd->addr1, fd->addr2); |
| 486 | } |
| 487 | |
| 488 | void flush_tlb_range(struct vm_area_struct *vma, |
| 489 | unsigned long start, unsigned long end) |
| 490 | { |
| 491 | struct flush_data fd = { |
| 492 | .vma = vma, |
| 493 | .addr1 = start, |
| 494 | .addr2 = end, |
| 495 | }; |
| 496 | on_each_cpu(ipi_flush_tlb_range, &fd, 1); |
| 497 | } |
| 498 | |
Max Filippov | 04c6b3e | 2014-02-14 14:08:48 +0400 | [diff] [blame] | 499 | static void ipi_flush_tlb_kernel_range(void *arg) |
| 500 | { |
| 501 | struct flush_data *fd = arg; |
| 502 | local_flush_tlb_kernel_range(fd->addr1, fd->addr2); |
| 503 | } |
| 504 | |
| 505 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) |
| 506 | { |
| 507 | struct flush_data fd = { |
| 508 | .addr1 = start, |
| 509 | .addr2 = end, |
| 510 | }; |
| 511 | on_each_cpu(ipi_flush_tlb_kernel_range, &fd, 1); |
| 512 | } |
| 513 | |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 514 | /* Cache flush functions */ |
| 515 | |
| 516 | static void ipi_flush_cache_all(void *arg) |
| 517 | { |
| 518 | local_flush_cache_all(); |
| 519 | } |
| 520 | |
| 521 | void flush_cache_all(void) |
| 522 | { |
| 523 | on_each_cpu(ipi_flush_cache_all, NULL, 1); |
| 524 | } |
| 525 | |
| 526 | static void ipi_flush_cache_page(void *arg) |
| 527 | { |
| 528 | struct flush_data *fd = arg; |
| 529 | local_flush_cache_page(fd->vma, fd->addr1, fd->addr2); |
| 530 | } |
| 531 | |
| 532 | void flush_cache_page(struct vm_area_struct *vma, |
| 533 | unsigned long address, unsigned long pfn) |
| 534 | { |
| 535 | struct flush_data fd = { |
| 536 | .vma = vma, |
| 537 | .addr1 = address, |
| 538 | .addr2 = pfn, |
| 539 | }; |
| 540 | on_each_cpu(ipi_flush_cache_page, &fd, 1); |
| 541 | } |
| 542 | |
| 543 | static void ipi_flush_cache_range(void *arg) |
| 544 | { |
| 545 | struct flush_data *fd = arg; |
| 546 | local_flush_cache_range(fd->vma, fd->addr1, fd->addr2); |
| 547 | } |
| 548 | |
| 549 | void flush_cache_range(struct vm_area_struct *vma, |
| 550 | unsigned long start, unsigned long end) |
| 551 | { |
| 552 | struct flush_data fd = { |
| 553 | .vma = vma, |
| 554 | .addr1 = start, |
| 555 | .addr2 = end, |
| 556 | }; |
| 557 | on_each_cpu(ipi_flush_cache_range, &fd, 1); |
| 558 | } |
| 559 | |
| 560 | static void ipi_flush_icache_range(void *arg) |
| 561 | { |
| 562 | struct flush_data *fd = arg; |
| 563 | local_flush_icache_range(fd->addr1, fd->addr2); |
| 564 | } |
| 565 | |
| 566 | void flush_icache_range(unsigned long start, unsigned long end) |
| 567 | { |
| 568 | struct flush_data fd = { |
| 569 | .addr1 = start, |
| 570 | .addr2 = end, |
| 571 | }; |
| 572 | on_each_cpu(ipi_flush_icache_range, &fd, 1); |
| 573 | } |
Pranith Kumar | e356030 | 2014-08-29 15:19:09 -0700 | [diff] [blame] | 574 | EXPORT_SYMBOL(flush_icache_range); |
Max Filippov | 49b424f | 2013-10-17 02:42:28 +0400 | [diff] [blame] | 575 | |
| 576 | /* ------------------------------------------------------------------------- */ |
| 577 | |
| 578 | static void ipi_invalidate_dcache_range(void *arg) |
| 579 | { |
| 580 | struct flush_data *fd = arg; |
| 581 | __invalidate_dcache_range(fd->addr1, fd->addr2); |
| 582 | } |
| 583 | |
| 584 | static void system_invalidate_dcache_range(unsigned long start, |
| 585 | unsigned long size) |
| 586 | { |
| 587 | struct flush_data fd = { |
| 588 | .addr1 = start, |
| 589 | .addr2 = size, |
| 590 | }; |
| 591 | on_each_cpu(ipi_invalidate_dcache_range, &fd, 1); |
| 592 | } |
| 593 | |
| 594 | static void ipi_flush_invalidate_dcache_range(void *arg) |
| 595 | { |
| 596 | struct flush_data *fd = arg; |
| 597 | __flush_invalidate_dcache_range(fd->addr1, fd->addr2); |
| 598 | } |
| 599 | |
| 600 | static void system_flush_invalidate_dcache_range(unsigned long start, |
| 601 | unsigned long size) |
| 602 | { |
| 603 | struct flush_data fd = { |
| 604 | .addr1 = start, |
| 605 | .addr2 = size, |
| 606 | }; |
| 607 | on_each_cpu(ipi_flush_invalidate_dcache_range, &fd, 1); |
| 608 | } |