/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_BARRIER_H #define __ASM_BARRIER_H #ifndef __ASSEMBLY__ /* The synchronize caches instruction executes as a nop on systems in which all memory references are performed in order. */ #define synchronize_caches() __asm__ __volatile__ ("sync" : : : "memory") #if defined(CONFIG_SMP) #define mb() do { synchronize_caches(); } while (0) #define rmb() mb() #define wmb() mb() #define dma_rmb() mb() #define dma_wmb() mb() #else #define mb() barrier() #define rmb() barrier() #define wmb() barrier() #define dma_rmb() barrier() #define dma_wmb() barrier() #endif #define __smp_mb() mb() #define __smp_rmb() mb() #define __smp_wmb() mb() #define __smp_store_release(p, v) \ do { \ typeof(p) __p = (p); \ union { typeof(*p) __val; char __c[1]; } __u = \ { .__val = (__force typeof(*p)) (v) }; \ compiletime_assert_atomic_type(*p); \ switch (sizeof(*p)) { \ case 1: \ asm volatile("stb,ma %0,0(%1)" \ : : "r"(*(__u8 *)__u.__c), "r"(__p) \ : "memory"); \ break; \ case 2: \ asm volatile("sth,ma %0,0(%1)" \ : : "r"(*(__u16 *)__u.__c), "r"(__p) \ : "memory"); \ break; \ case 4: \ asm volatile("stw,ma %0,0(%1)" \ : : "r"(*(__u32 *)__u.__c), "r"(__p) \ : "memory"); \ break; \ case 8: \ if (IS_ENABLED(CONFIG_64BIT)) \ asm volatile("std,ma %0,0(%1)" \ : : "r"(*(__u64 *)__u.__c), "r"(__p) \ : "memory"); \ break; \ } \ } while (0) #define __smp_load_acquire(p) \ ({ \ union { typeof(*p) __val; char __c[1]; } __u; \ typeof(p) __p = (p); \ compiletime_assert_atomic_type(*p); \ switch (sizeof(*p)) { \ case 1: \ asm volatile("ldb,ma 0(%1),%0" \ : "=r"(*(__u8 *)__u.__c) : "r"(__p) \ : "memory"); \ break; \ case 2: \ asm volatile("ldh,ma 0(%1),%0" \ : "=r"(*(__u16 *)__u.__c) : "r"(__p) \ : "memory"); \ break; \ case 4: \ asm volatile("ldw,ma 0(%1),%0" \ : "=r"(*(__u32 *)__u.__c) : "r"(__p) \ : "memory"); \ break; \ case 8: \ if (IS_ENABLED(CONFIG_64BIT)) \ asm volatile("ldd,ma 0(%1),%0" \ : "=r"(*(__u64 *)__u.__c) : "r"(__p) \ : "memory"); \ break; \ } \ __u.__val; \ }) #include <asm-generic/barrier.h> #endif /* !__ASSEMBLY__ */ #endif /* __ASM_BARRIER_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 610 B | 0644 |
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agp.h | File | 596 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asmregs.h | File | 3.04 KB | 0644 |
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assembly.h | File | 12.94 KB | 0644 |
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atomic.h | File | 8.24 KB | 0644 |
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barrier.h | File | 2.44 KB | 0644 |
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bitops.h | File | 5.89 KB | 0644 |
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bug.h | File | 2.35 KB | 0644 |
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bugs.h | File | 340 B | 0644 |
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cache.h | File | 1.59 KB | 0644 |
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cacheflush.h | File | 4.06 KB | 0644 |
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checksum.h | File | 5.48 KB | 0644 |
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cmpxchg.h | File | 3.62 KB | 0644 |
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compat.h | File | 6.52 KB | 0644 |
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compat_ucontext.h | File | 591 B | 0644 |
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delay.h | File | 533 B | 0644 |
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dma-mapping.h | File | 2.42 KB | 0644 |
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dma.h | File | 5.71 KB | 0644 |
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dwarf.h | File | 602 B | 0644 |
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eisa_bus.h | File | 702 B | 0644 |
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eisa_eeprom.h | File | 4.42 KB | 0644 |
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elf.h | File | 14.31 KB | 0644 |
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fb.h | File | 403 B | 0644 |
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fixmap.h | File | 1.15 KB | 0644 |
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floppy.h | File | 6.61 KB | 0644 |
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ftrace.h | File | 379 B | 0644 |
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futex.h | File | 2.66 KB | 0644 |
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grfioctl.h | File | 4.68 KB | 0644 |
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hardirq.h | File | 1.3 KB | 0644 |
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hardware.h | File | 4.09 KB | 0644 |
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hash.h | File | 5.07 KB | 0644 |
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hugetlb.h | File | 1.67 KB | 0644 |
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ide.h | File | 1.09 KB | 0644 |
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io.h | File | 8.14 KB | 0644 |
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irq.h | File | 1.23 KB | 0644 |
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irqflags.h | File | 1.02 KB | 0644 |
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kbdleds.h | File | 477 B | 0644 |
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kmap_types.h | File | 221 B | 0644 |
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ldcw.h | File | 2.15 KB | 0644 |
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led.h | File | 1.33 KB | 0644 |
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linkage.h | File | 759 B | 0644 |
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machdep.h | File | 349 B | 0644 |
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mckinley.h | File | 270 B | 0644 |
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mmu.h | File | 195 B | 0644 |
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mmu_context.h | File | 2.08 KB | 0644 |
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mmzone.h | File | 1.51 KB | 0644 |
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module.h | File | 527 B | 0644 |
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page.h | File | 5.42 KB | 0644 |
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parisc-device.h | File | 1.92 KB | 0644 |
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parport.h | File | 358 B | 0644 |
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pci.h | File | 6.57 KB | 0644 |
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pdc.h | File | 3.93 KB | 0644 |
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pdc_chassis.h | File | 15.06 KB | 0644 |
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pdcpat.h | File | 15 KB | 0644 |
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perf.h | File | 1.89 KB | 0644 |
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perf_event.h | File | 152 B | 0644 |
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pgalloc.h | File | 4.22 KB | 0644 |
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pgtable.h | File | 18.92 KB | 0644 |
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prefetch.h | File | 1.12 KB | 0644 |
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processor.h | File | 9.86 KB | 0644 |
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psw.h | File | 2.39 KB | 0644 |
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ptrace.h | File | 803 B | 0644 |
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ropes.h | File | 9.73 KB | 0644 |
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rt_sigframe.h | File | 745 B | 0644 |
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runway.h | File | 320 B | 0644 |
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sections.h | File | 283 B | 0644 |
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serial.h | File | 124 B | 0644 |
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shmparam.h | File | 263 B | 0644 |
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signal.h | File | 841 B | 0644 |
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smp.h | File | 1.25 KB | 0644 |
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socket.h | File | 311 B | 0644 |
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special_insns.h | File | 1015 B | 0644 |
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spinlock.h | File | 4.02 KB | 0644 |
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spinlock_types.h | File | 483 B | 0644 |
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string.h | File | 247 B | 0644 |
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superio.h | File | 3.25 KB | 0644 |
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switch_to.h | File | 332 B | 0644 |
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syscall.h | File | 1.4 KB | 0644 |
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termios.h | File | 1.72 KB | 0644 |
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thread_info.h | File | 3.15 KB | 0644 |
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timex.h | File | 372 B | 0644 |
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tlb.h | File | 672 B | 0644 |
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tlbflush.h | File | 2.63 KB | 0644 |
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topology.h | File | 900 B | 0644 |
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traps.h | File | 468 B | 0644 |
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uaccess.h | File | 6.55 KB | 0644 |
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ucontext.h | File | 327 B | 0644 |
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unaligned.h | File | 472 B | 0644 |
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unistd.h | File | 5.47 KB | 0644 |
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unwind.h | File | 2.56 KB | 0644 |
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