/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_M32R_ATOMIC_H #define _ASM_M32R_ATOMIC_H /* * linux/include/asm-m32r/atomic.h * * M32R version: * Copyright (C) 2001, 2002 Hitoshi Yamamoto * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> */ #include <linux/types.h> #include <asm/assembler.h> #include <asm/cmpxchg.h> #include <asm/dcache_clear.h> #include <asm/barrier.h> /* * Atomic operations that C can't guarantee us. Useful for * resource counting etc.. */ #define ATOMIC_INIT(i) { (i) } /** * atomic_read - read atomic variable * @v: pointer of type atomic_t * * Atomically reads the value of @v. */ #define atomic_read(v) READ_ONCE((v)->counter) /** * atomic_set - set atomic variable * @v: pointer of type atomic_t * @i: required value * * Atomically sets the value of @v to @i. */ #define atomic_set(v,i) WRITE_ONCE(((v)->counter), (i)) #ifdef CONFIG_CHIP_M32700_TS1 #define __ATOMIC_CLOBBER , "r4" #else #define __ATOMIC_CLOBBER #endif #define ATOMIC_OP(op) \ static __inline__ void atomic_##op(int i, atomic_t *v) \ { \ unsigned long flags; \ int result; \ \ local_irq_save(flags); \ __asm__ __volatile__ ( \ "# atomic_" #op " \n\t" \ DCACHE_CLEAR("%0", "r4", "%1") \ M32R_LOCK" %0, @%1; \n\t" \ #op " %0, %2; \n\t" \ M32R_UNLOCK" %0, @%1; \n\t" \ : "=&r" (result) \ : "r" (&v->counter), "r" (i) \ : "memory" \ __ATOMIC_CLOBBER \ ); \ local_irq_restore(flags); \ } \ #define ATOMIC_OP_RETURN(op) \ static __inline__ int atomic_##op##_return(int i, atomic_t *v) \ { \ unsigned long flags; \ int result; \ \ local_irq_save(flags); \ __asm__ __volatile__ ( \ "# atomic_" #op "_return \n\t" \ DCACHE_CLEAR("%0", "r4", "%1") \ M32R_LOCK" %0, @%1; \n\t" \ #op " %0, %2; \n\t" \ M32R_UNLOCK" %0, @%1; \n\t" \ : "=&r" (result) \ : "r" (&v->counter), "r" (i) \ : "memory" \ __ATOMIC_CLOBBER \ ); \ local_irq_restore(flags); \ \ return result; \ } #define ATOMIC_FETCH_OP(op) \ static __inline__ int atomic_fetch_##op(int i, atomic_t *v) \ { \ unsigned long flags; \ int result, val; \ \ local_irq_save(flags); \ __asm__ __volatile__ ( \ "# atomic_fetch_" #op " \n\t" \ DCACHE_CLEAR("%0", "r4", "%2") \ M32R_LOCK" %1, @%2; \n\t" \ "mv %0, %1 \n\t" \ #op " %1, %3; \n\t" \ M32R_UNLOCK" %1, @%2; \n\t" \ : "=&r" (result), "=&r" (val) \ : "r" (&v->counter), "r" (i) \ : "memory" \ __ATOMIC_CLOBBER \ ); \ local_irq_restore(flags); \ \ return result; \ } #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op) ATOMIC_OPS(add) ATOMIC_OPS(sub) #undef ATOMIC_OPS #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) ATOMIC_OPS(and) ATOMIC_OPS(or) ATOMIC_OPS(xor) #undef ATOMIC_OPS #undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN #undef ATOMIC_OP /** * atomic_sub_and_test - subtract value from variable and test result * @i: integer value to subtract * @v: pointer of type atomic_t * * Atomically subtracts @i from @v and returns * true if the result is zero, or false for all * other cases. */ #define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0) /** * atomic_inc_return - increment atomic variable and return it * @v: pointer of type atomic_t * * Atomically increments @v by 1 and returns the result. */ static __inline__ int atomic_inc_return(atomic_t *v) { unsigned long flags; int result; local_irq_save(flags); __asm__ __volatile__ ( "# atomic_inc_return \n\t" DCACHE_CLEAR("%0", "r4", "%1") M32R_LOCK" %0, @%1; \n\t" "addi %0, #1; \n\t" M32R_UNLOCK" %0, @%1; \n\t" : "=&r" (result) : "r" (&v->counter) : "memory" __ATOMIC_CLOBBER ); local_irq_restore(flags); return result; } /** * atomic_dec_return - decrement atomic variable and return it * @v: pointer of type atomic_t * * Atomically decrements @v by 1 and returns the result. */ static __inline__ int atomic_dec_return(atomic_t *v) { unsigned long flags; int result; local_irq_save(flags); __asm__ __volatile__ ( "# atomic_dec_return \n\t" DCACHE_CLEAR("%0", "r4", "%1") M32R_LOCK" %0, @%1; \n\t" "addi %0, #-1; \n\t" M32R_UNLOCK" %0, @%1; \n\t" : "=&r" (result) : "r" (&v->counter) : "memory" __ATOMIC_CLOBBER ); local_irq_restore(flags); return result; } /** * atomic_inc - increment atomic variable * @v: pointer of type atomic_t * * Atomically increments @v by 1. */ #define atomic_inc(v) ((void)atomic_inc_return(v)) /** * atomic_dec - decrement atomic variable * @v: pointer of type atomic_t * * Atomically decrements @v by 1. */ #define atomic_dec(v) ((void)atomic_dec_return(v)) /** * atomic_inc_and_test - increment and test * @v: pointer of type atomic_t * * Atomically increments @v by 1 * and returns true if the result is zero, or false for all * other cases. */ #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) /** * atomic_dec_and_test - decrement and test * @v: pointer of type atomic_t * * Atomically decrements @v by 1 and * returns true if the result is 0, or false for all * other cases. */ #define atomic_dec_and_test(v) (atomic_dec_return(v) == 0) /** * atomic_add_negative - add and test if negative * @v: pointer of type atomic_t * @i: integer value to add * * Atomically adds @i to @v and returns true * if the result is negative, or false when * result is greater than or equal to zero. */ #define atomic_add_negative(i,v) (atomic_add_return((i), (v)) < 0) #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) /** * __atomic_add_unless - add unless the number is a given value * @v: pointer of type atomic_t * @a: the amount to add to v... * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as it was not @u. * Returns the old value of @v. */ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u) { int c, old; c = atomic_read(v); for (;;) { if (unlikely(c == (u))) break; old = atomic_cmpxchg((v), c, c + (a)); if (likely(old == c)) break; c = old; } return c; } #endif /* _ASM_M32R_ATOMIC_H */
Name | Type | Size | Permission | Actions |
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m32104ut | Folder | 0755 |
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m32700ut | Folder | 0755 |
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mappi2 | Folder | 0755 |
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mappi3 | Folder | 0755 |
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opsput | Folder | 0755 |
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Kbuild | File | 318 B | 0644 |
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addrspace.h | File | 1.67 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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assembler.h | File | 4.2 KB | 0644 |
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atomic.h | File | 6.29 KB | 0644 |
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barrier.h | File | 506 B | 0644 |
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bitops.h | File | 6.23 KB | 0644 |
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bug.h | File | 115 B | 0644 |
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bugs.h | File | 410 B | 0644 |
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cache.h | File | 222 B | 0644 |
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cachectl.h | File | 739 B | 0644 |
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cacheflush.h | File | 3.2 KB | 0644 |
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checksum.h | File | 4.83 KB | 0644 |
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cmpxchg.h | File | 4.86 KB | 0644 |
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dcache_clear.h | File | 1.01 KB | 0644 |
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delay.h | File | 31 B | 0644 |
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device.h | File | 148 B | 0644 |
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div64.h | File | 31 B | 0644 |
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dma-mapping.h | File | 570 B | 0644 |
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dma.h | File | 281 B | 0644 |
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elf.h | File | 3.64 KB | 0644 |
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emergency-restart.h | File | 188 B | 0644 |
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fb.h | File | 414 B | 0644 |
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flat.h | File | 4.2 KB | 0644 |
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ftrace.h | File | 12 B | 0644 |
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futex.h | File | 82 B | 0644 |
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hardirq.h | File | 214 B | 0644 |
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hw_irq.h | File | 87 B | 0644 |
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io.h | File | 6.44 KB | 0644 |
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irq.h | File | 2.94 KB | 0644 |
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irq_regs.h | File | 34 B | 0644 |
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irqflags.h | File | 2.24 KB | 0644 |
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kdebug.h | File | 32 B | 0644 |
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kmap_types.h | File | 251 B | 0644 |
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linkage.h | File | 177 B | 0644 |
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local.h | File | 7.8 KB | 0644 |
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local64.h | File | 33 B | 0644 |
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m32102.h | File | 14.71 KB | 0644 |
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m32r.h | File | 5.7 KB | 0644 |
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m32r_mp_fpga.h | File | 14.89 KB | 0644 |
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mc146818rtc.h | File | 671 B | 0644 |
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mmu.h | File | 403 B | 0644 |
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mmu_context.h | File | 4.23 KB | 0644 |
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mmzone.h | File | 1.29 KB | 0644 |
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page.h | File | 2.62 KB | 0644 |
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pci.h | File | 147 B | 0644 |
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percpu.h | File | 165 B | 0644 |
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pgalloc.h | File | 1.84 KB | 0644 |
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pgtable-2level.h | File | 2.31 KB | 0644 |
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pgtable.h | File | 9.7 KB | 0644 |
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processor.h | File | 2.93 KB | 0644 |
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ptrace.h | File | 1.3 KB | 0644 |
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rtc.h | File | 1.99 KB | 0644 |
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s1d13806.h | File | 9.84 KB | 0644 |
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segment.h | File | 228 B | 0644 |
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serial.h | File | 187 B | 0644 |
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setup.h | File | 1022 B | 0644 |
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shmparam.h | File | 197 B | 0644 |
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signal.h | File | 561 B | 0644 |
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smp.h | File | 3.5 KB | 0644 |
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spinlock.h | File | 7.15 KB | 0644 |
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spinlock_types.h | File | 520 B | 0644 |
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string.h | File | 378 B | 0644 |
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switch_to.h | File | 1.48 KB | 0644 |
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syscall.h | File | 252 B | 0644 |
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termios.h | File | 1.74 KB | 0644 |
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thread_info.h | File | 3.71 KB | 0644 |
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timex.h | File | 581 B | 0644 |
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tlb.h | File | 483 B | 0644 |
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tlbflush.h | File | 2.94 KB | 0644 |
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topology.h | File | 167 B | 0644 |
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types.h | File | 258 B | 0644 |
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uaccess.h | File | 15.3 KB | 0644 |
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ucontext.h | File | 321 B | 0644 |
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unaligned.h | File | 592 B | 0644 |
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unistd.h | File | 1.23 KB | 0644 |
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user.h | File | 2.1 KB | 0644 |
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vga.h | File | 436 B | 0644 |
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xor.h | File | 148 B | 0644 |
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