/* * cmpxchg.h -- forked from asm/atomic.h with this copyright: * * Copyright 2010 Tilera Corporation. All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, version 2. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for * more details. * */ #ifndef _ASM_TILE_CMPXCHG_H #define _ASM_TILE_CMPXCHG_H #ifndef __ASSEMBLY__ #include <asm/barrier.h> /* Nonexistent functions intended to cause compile errors. */ extern void __xchg_called_with_bad_pointer(void) __compiletime_error("Bad argument size for xchg"); extern void __cmpxchg_called_with_bad_pointer(void) __compiletime_error("Bad argument size for cmpxchg"); #ifndef __tilegx__ /* Note the _atomic_xxx() routines include a final mb(). */ int _atomic_xchg(int *ptr, int n); int _atomic_xchg_add(int *v, int i); int _atomic_xchg_add_unless(int *v, int a, int u); int _atomic_cmpxchg(int *ptr, int o, int n); long long _atomic64_xchg(long long *v, long long n); long long _atomic64_xchg_add(long long *v, long long i); long long _atomic64_xchg_add_unless(long long *v, long long a, long long u); long long _atomic64_cmpxchg(long long *v, long long o, long long n); #define xchg(ptr, n) \ ({ \ if (sizeof(*(ptr)) != 4) \ __xchg_called_with_bad_pointer(); \ smp_mb(); \ (typeof(*(ptr)))_atomic_xchg((int *)(ptr), (int)(n)); \ }) #define cmpxchg(ptr, o, n) \ ({ \ if (sizeof(*(ptr)) != 4) \ __cmpxchg_called_with_bad_pointer(); \ smp_mb(); \ (typeof(*(ptr)))_atomic_cmpxchg((int *)ptr, (int)o, \ (int)n); \ }) #define xchg64(ptr, n) \ ({ \ if (sizeof(*(ptr)) != 8) \ __xchg_called_with_bad_pointer(); \ smp_mb(); \ (typeof(*(ptr)))_atomic64_xchg((long long *)(ptr), \ (long long)(n)); \ }) #define cmpxchg64(ptr, o, n) \ ({ \ if (sizeof(*(ptr)) != 8) \ __cmpxchg_called_with_bad_pointer(); \ smp_mb(); \ (typeof(*(ptr)))_atomic64_cmpxchg((long long *)ptr, \ (long long)o, (long long)n); \ }) #else #define xchg(ptr, n) \ ({ \ typeof(*(ptr)) __x; \ smp_mb(); \ switch (sizeof(*(ptr))) { \ case 4: \ __x = (typeof(__x))(unsigned long) \ __insn_exch4((ptr), \ (u32)(unsigned long)(n)); \ break; \ case 8: \ __x = (typeof(__x)) \ __insn_exch((ptr), (unsigned long)(n)); \ break; \ default: \ __xchg_called_with_bad_pointer(); \ break; \ } \ smp_mb(); \ __x; \ }) #define cmpxchg(ptr, o, n) \ ({ \ typeof(*(ptr)) __x; \ __insn_mtspr(SPR_CMPEXCH_VALUE, (unsigned long)(o)); \ smp_mb(); \ switch (sizeof(*(ptr))) { \ case 4: \ __x = (typeof(__x))(unsigned long) \ __insn_cmpexch4((ptr), \ (u32)(unsigned long)(n)); \ break; \ case 8: \ __x = (typeof(__x))__insn_cmpexch((ptr), \ (long long)(n)); \ break; \ default: \ __cmpxchg_called_with_bad_pointer(); \ break; \ } \ smp_mb(); \ __x; \ }) #define xchg64 xchg #define cmpxchg64 cmpxchg #endif #endif /* __ASSEMBLY__ */ #endif /* _ASM_TILE_CMPXCHG_H */
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Kbuild | File | 439 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic.h | File | 5.14 KB | 0644 |
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atomic_32.h | File | 8.91 KB | 0644 |
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atomic_64.h | File | 5.51 KB | 0644 |
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backtrace.h | File | 3.98 KB | 0644 |
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barrier.h | File | 2.89 KB | 0644 |
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bitops.h | File | 2.37 KB | 0644 |
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bitops_32.h | File | 4.01 KB | 0644 |
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bitops_64.h | File | 2.67 KB | 0644 |
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cache.h | File | 2.6 KB | 0644 |
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cacheflush.h | File | 4.94 KB | 0644 |
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checksum.h | File | 1.23 KB | 0644 |
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cmpxchg.h | File | 3.47 KB | 0644 |
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compat.h | File | 7.38 KB | 0644 |
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current.h | File | 947 B | 0644 |
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delay.h | File | 1.1 KB | 0644 |
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device.h | File | 978 B | 0644 |
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div64.h | File | 319 B | 0644 |
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dma-mapping.h | File | 1.82 KB | 0644 |
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dma.h | File | 762 B | 0644 |
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elf.h | File | 5.42 KB | 0644 |
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fixmap.h | File | 2.73 KB | 0644 |
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ftrace.h | File | 1.08 KB | 0644 |
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futex.h | File | 4.23 KB | 0644 |
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hardirq.h | File | 1.28 KB | 0644 |
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hardwall.h | File | 1.08 KB | 0644 |
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highmem.h | File | 2.08 KB | 0644 |
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homecache.h | File | 4.21 KB | 0644 |
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hugetlb.h | File | 3.04 KB | 0644 |
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hv_driver.h | File | 1.92 KB | 0644 |
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ide.h | File | 758 B | 0644 |
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insn.h | File | 1.79 KB | 0644 |
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io.h | File | 12.43 KB | 0644 |
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irq.h | File | 3.11 KB | 0644 |
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irq_work.h | File | 283 B | 0644 |
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irqflags.h | File | 10.55 KB | 0644 |
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jump_label.h | File | 1.47 KB | 0644 |
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kdebug.h | File | 769 B | 0644 |
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kexec.h | File | 2.23 KB | 0644 |
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kgdb.h | File | 1.99 KB | 0644 |
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kmap_types.h | File | 1.02 KB | 0644 |
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kprobes.h | File | 2.19 KB | 0644 |
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linkage.h | File | 1.46 KB | 0644 |
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mmu.h | File | 965 B | 0644 |
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mmu_context.h | File | 4.5 KB | 0644 |
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mmzone.h | File | 2.07 KB | 0644 |
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module.h | File | 1.12 KB | 0644 |
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page.h | File | 10.32 KB | 0644 |
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pci.h | File | 6.58 KB | 0644 |
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percpu.h | File | 1.79 KB | 0644 |
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perf_event.h | File | 766 B | 0644 |
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pgalloc.h | File | 4.76 KB | 0644 |
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pgtable.h | File | 15.66 KB | 0644 |
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pgtable_32.h | File | 4.08 KB | 0644 |
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pgtable_64.h | File | 5.11 KB | 0644 |
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pmc.h | File | 2.15 KB | 0644 |
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processor.h | File | 10.62 KB | 0644 |
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ptrace.h | File | 2.96 KB | 0644 |
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sections.h | File | 1.37 KB | 0644 |
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setup.h | File | 1.63 KB | 0644 |
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sigframe.h | File | 956 B | 0644 |
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signal.h | File | 1.07 KB | 0644 |
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smp.h | File | 3.98 KB | 0644 |
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spinlock.h | File | 741 B | 0644 |
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spinlock_32.h | File | 2.9 KB | 0644 |
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spinlock_64.h | File | 3.88 KB | 0644 |
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spinlock_types.h | File | 1.58 KB | 0644 |
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stack.h | File | 2.59 KB | 0644 |
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string.h | File | 1.19 KB | 0644 |
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switch_to.h | File | 2.75 KB | 0644 |
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syscall.h | File | 2.88 KB | 0644 |
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syscalls.h | File | 2.35 KB | 0644 |
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thread_info.h | File | 5.54 KB | 0644 |
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tile-desc.h | File | 650 B | 0644 |
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tile-desc_32.h | File | 12.54 KB | 0644 |
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tile-desc_64.h | File | 10.83 KB | 0644 |
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timex.h | File | 1.71 KB | 0644 |
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tlb.h | File | 878 B | 0644 |
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tlbflush.h | File | 3.99 KB | 0644 |
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topology.h | File | 1.52 KB | 0644 |
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traps.h | File | 2.44 KB | 0644 |
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uaccess.h | File | 12.77 KB | 0644 |
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unaligned.h | File | 1.56 KB | 0644 |
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unistd.h | File | 777 B | 0644 |
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user.h | File | 717 B | 0644 |
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vdso.h | File | 1.84 KB | 0644 |
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vga.h | File | 1.05 KB | 0644 |
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word-at-a-time.h | File | 1.07 KB | 0644 |
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