/* xchg and cmpxchg operation emulation for FR-V * * For an explanation of how atomic ops work in this arch, see: * Documentation/frv/atomic-ops.txt * * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * 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; either version * 2 of the License, or (at your option) any later version. */ #ifndef _ASM_CMPXCHG_H #define _ASM_CMPXCHG_H #include <linux/types.h> /*****************************************************************************/ /* * exchange value with memory */ extern uint64_t __xchg_64(uint64_t i, volatile void *v); #ifndef CONFIG_FRV_OUTOFLINE_ATOMIC_OPS #define xchg(ptr, x) \ ({ \ __typeof__(ptr) __xg_ptr = (ptr); \ __typeof__(*(ptr)) __xg_orig; \ \ switch (sizeof(__xg_orig)) { \ case 4: \ asm volatile( \ "swap%I0 %M0,%1" \ : "+m"(*__xg_ptr), "=r"(__xg_orig) \ : "1"(x) \ : "memory" \ ); \ break; \ \ default: \ __xg_orig = (__typeof__(__xg_orig))0; \ asm volatile("break"); \ break; \ } \ \ __xg_orig; \ }) #else extern uint32_t __xchg_32(uint32_t i, volatile void *v); #define xchg(ptr, x) \ ({ \ __typeof__(ptr) __xg_ptr = (ptr); \ __typeof__(*(ptr)) __xg_orig; \ \ switch (sizeof(__xg_orig)) { \ case 4: __xg_orig = (__typeof__(*(ptr))) __xchg_32((uint32_t) x, __xg_ptr); break; \ default: \ __xg_orig = (__typeof__(__xg_orig))0; \ asm volatile("break"); \ break; \ } \ __xg_orig; \ }) #endif /*****************************************************************************/ /* * compare and conditionally exchange value with memory * - if (*ptr == test) then orig = *ptr; *ptr = test; * - if (*ptr != test) then orig = *ptr; */ extern uint64_t __cmpxchg_64(uint64_t test, uint64_t new, volatile uint64_t *v); #define cmpxchg64(p, o, n) __cmpxchg_64((o), (n), (p)) #ifndef CONFIG_FRV_OUTOFLINE_ATOMIC_OPS #define cmpxchg(ptr, test, new) \ ({ \ __typeof__(ptr) __xg_ptr = (ptr); \ __typeof__(*(ptr)) __xg_orig, __xg_tmp; \ __typeof__(*(ptr)) __xg_test = (test); \ __typeof__(*(ptr)) __xg_new = (new); \ \ switch (sizeof(__xg_orig)) { \ case 4: \ asm volatile( \ "0: \n" \ " orcc gr0,gr0,gr0,icc3 \n" \ " ckeq icc3,cc7 \n" \ " ld.p %M0,%1 \n" \ " orcr cc7,cc7,cc3 \n" \ " sub%I4cc %1,%4,%2,icc0 \n" \ " bne icc0,#0,1f \n" \ " cst.p %3,%M0 ,cc3,#1 \n" \ " corcc gr29,gr29,gr0 ,cc3,#1 \n" \ " beq icc3,#0,0b \n" \ "1: \n" \ : "+U"(*__xg_ptr), "=&r"(__xg_orig), "=&r"(__xg_tmp) \ : "r"(__xg_new), "NPr"(__xg_test) \ : "memory", "cc7", "cc3", "icc3", "icc0" \ ); \ break; \ \ default: \ __xg_orig = (__typeof__(__xg_orig))0; \ asm volatile("break"); \ break; \ } \ \ __xg_orig; \ }) #else extern uint32_t __cmpxchg_32(uint32_t *v, uint32_t test, uint32_t new); #define cmpxchg(ptr, test, new) \ ({ \ __typeof__(ptr) __xg_ptr = (ptr); \ __typeof__(*(ptr)) __xg_orig; \ __typeof__(*(ptr)) __xg_test = (test); \ __typeof__(*(ptr)) __xg_new = (new); \ \ switch (sizeof(__xg_orig)) { \ case 4: __xg_orig = (__force __typeof__(*ptr)) \ __cmpxchg_32((__force uint32_t *)__xg_ptr, \ (__force uint32_t)__xg_test, \ (__force uint32_t)__xg_new); break; \ default: \ __xg_orig = (__typeof__(__xg_orig))0; \ asm volatile("break"); \ break; \ } \ \ __xg_orig; \ }) #endif #include <asm-generic/cmpxchg-local.h> static inline unsigned long __cmpxchg_local(volatile void *ptr, unsigned long old, unsigned long new, int size) { switch (size) { case 4: return cmpxchg((unsigned long *)ptr, old, new); default: return __cmpxchg_local_generic(ptr, old, new, size); } return old; } /* * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make * them available. */ #define cmpxchg_local(ptr, o, n) \ ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \ (unsigned long)(n), sizeof(*(ptr)))) #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) #endif /* _ASM_CMPXCHG_H */
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Kbuild | File | 290 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic.h | File | 4.97 KB | 0644 |
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atomic_defs.h | File | 4.66 KB | 0644 |
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ax88796.h | File | 751 B | 0644 |
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barrier.h | File | 720 B | 0644 |
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bitops.h | File | 7.12 KB | 0644 |
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bug.h | File | 1.36 KB | 0644 |
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bugs.h | File | 445 B | 0644 |
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busctl-regs.h | File | 2.02 KB | 0644 |
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cache.h | File | 727 B | 0644 |
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cacheflush.h | File | 3.05 KB | 0644 |
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checksum.h | File | 4.53 KB | 0644 |
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cmpxchg.h | File | 4.56 KB | 0644 |
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cpu-irqs.h | File | 2.59 KB | 0644 |
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current.h | File | 685 B | 0644 |
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delay.h | File | 1.28 KB | 0644 |
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div64.h | File | 31 B | 0644 |
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dm9000.h | File | 1.12 KB | 0644 |
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dma-mapping.h | File | 448 B | 0644 |
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dma.h | File | 3.63 KB | 0644 |
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elf.h | File | 5.18 KB | 0644 |
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emergency-restart.h | File | 149 B | 0644 |
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fpu.h | File | 261 B | 0644 |
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ftrace.h | File | 12 B | 0644 |
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futex.h | File | 416 B | 0644 |
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gdb-stub.h | File | 4.47 KB | 0644 |
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gpio-regs.h | File | 3.64 KB | 0644 |
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hardirq.h | File | 666 B | 0644 |
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highmem.h | File | 4.09 KB | 0644 |
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hw_irq.h | File | 484 B | 0644 |
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io.h | File | 9.75 KB | 0644 |
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irc-regs.h | File | 1.78 KB | 0644 |
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irq.h | File | 760 B | 0644 |
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irq_regs.h | File | 764 B | 0644 |
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irqflags.h | File | 3.71 KB | 0644 |
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kdebug.h | File | 32 B | 0644 |
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kmap_types.h | File | 123 B | 0644 |
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linkage.h | File | 114 B | 0644 |
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local.h | File | 140 B | 0644 |
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local64.h | File | 33 B | 0644 |
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math-emu.h | File | 6.38 KB | 0644 |
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mb-regs.h | File | 6.94 KB | 0644 |
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mb86943a.h | File | 1.84 KB | 0644 |
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mb93091-fpga-irqs.h | File | 1.06 KB | 0644 |
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mb93093-fpga-irqs.h | File | 789 B | 0644 |
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mb93493-irqs.h | File | 1.69 KB | 0644 |
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mb93493-regs.h | File | 12.46 KB | 0644 |
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mem-layout.h | File | 2.21 KB | 0644 |
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mmu.h | File | 1.26 KB | 0644 |
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mmu_context.h | File | 1.38 KB | 0644 |
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module.h | File | 617 B | 0644 |
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page.h | File | 2.08 KB | 0644 |
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pci.h | File | 1.23 KB | 0644 |
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percpu.h | File | 147 B | 0644 |
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perf_event.h | File | 487 B | 0644 |
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pgalloc.h | File | 1.87 KB | 0644 |
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pgtable.h | File | 16.02 KB | 0644 |
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processor.h | File | 2.85 KB | 0644 |
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ptrace.h | File | 1.2 KB | 0644 |
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sections.h | File | 1.1 KB | 0644 |
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segment.h | File | 1.08 KB | 0644 |
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serial-regs.h | File | 1.63 KB | 0644 |
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serial.h | File | 308 B | 0644 |
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setup.h | File | 641 B | 0644 |
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shmparam.h | File | 183 B | 0644 |
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signal.h | File | 141 B | 0644 |
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smp.h | File | 139 B | 0644 |
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spinlock.h | File | 516 B | 0644 |
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spr-regs.h | File | 17.93 KB | 0644 |
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string.h | File | 1.36 KB | 0644 |
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switch_to.h | File | 1.07 KB | 0644 |
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syscall.h | File | 2.73 KB | 0644 |
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termios.h | File | 425 B | 0644 |
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thread_info.h | File | 3.48 KB | 0644 |
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timer-regs.h | File | 3.63 KB | 0644 |
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timex.h | File | 720 B | 0644 |
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tlb.h | File | 615 B | 0644 |
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tlbflush.h | File | 1.88 KB | 0644 |
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topology.h | File | 229 B | 0644 |
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types.h | File | 595 B | 0644 |
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uaccess.h | File | 6.79 KB | 0644 |
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ucontext.h | File | 281 B | 0644 |
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unaligned.h | File | 694 B | 0644 |
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unistd.h | File | 928 B | 0644 |
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user.h | File | 3.29 KB | 0644 |
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vga.h | File | 464 B | 0644 |
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virtconvert.h | File | 1.09 KB | 0644 |
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xor.h | File | 29 B | 0644 |
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