/* * Copyright (C) 2014 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any * kind, whether express or implied. */ #ifndef __ASM_OPENRISC_ATOMIC_H #define __ASM_OPENRISC_ATOMIC_H #include <linux/types.h> /* Atomically perform op with v->counter and i */ #define ATOMIC_OP(op) \ static inline void atomic_##op(int i, atomic_t *v) \ { \ int tmp; \ \ __asm__ __volatile__( \ "1: l.lwa %0,0(%1) \n" \ " l." #op " %0,%0,%2 \n" \ " l.swa 0(%1),%0 \n" \ " l.bnf 1b \n" \ " l.nop \n" \ : "=&r"(tmp) \ : "r"(&v->counter), "r"(i) \ : "cc", "memory"); \ } /* Atomically perform op with v->counter and i, return the result */ #define ATOMIC_OP_RETURN(op) \ static inline int atomic_##op##_return(int i, atomic_t *v) \ { \ int tmp; \ \ __asm__ __volatile__( \ "1: l.lwa %0,0(%1) \n" \ " l." #op " %0,%0,%2 \n" \ " l.swa 0(%1),%0 \n" \ " l.bnf 1b \n" \ " l.nop \n" \ : "=&r"(tmp) \ : "r"(&v->counter), "r"(i) \ : "cc", "memory"); \ \ return tmp; \ } /* Atomically perform op with v->counter and i, return orig v->counter */ #define ATOMIC_FETCH_OP(op) \ static inline int atomic_fetch_##op(int i, atomic_t *v) \ { \ int tmp, old; \ \ __asm__ __volatile__( \ "1: l.lwa %0,0(%2) \n" \ " l." #op " %1,%0,%3 \n" \ " l.swa 0(%2),%1 \n" \ " l.bnf 1b \n" \ " l.nop \n" \ : "=&r"(old), "=&r"(tmp) \ : "r"(&v->counter), "r"(i) \ : "cc", "memory"); \ \ return old; \ } ATOMIC_OP_RETURN(add) ATOMIC_OP_RETURN(sub) ATOMIC_FETCH_OP(add) ATOMIC_FETCH_OP(sub) ATOMIC_FETCH_OP(and) ATOMIC_FETCH_OP(or) ATOMIC_FETCH_OP(xor) ATOMIC_OP(and) ATOMIC_OP(or) ATOMIC_OP(xor) #undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN #undef ATOMIC_OP #define atomic_add_return atomic_add_return #define atomic_sub_return atomic_sub_return #define atomic_fetch_add atomic_fetch_add #define atomic_fetch_sub atomic_fetch_sub #define atomic_fetch_and atomic_fetch_and #define atomic_fetch_or atomic_fetch_or #define atomic_fetch_xor atomic_fetch_xor #define atomic_and atomic_and #define atomic_or atomic_or #define atomic_xor atomic_xor /* * Atomically add a to v->counter as long as v is not already u. * Returns the original value at v->counter. * * This is often used through atomic_inc_not_zero() */ static inline int __atomic_add_unless(atomic_t *v, int a, int u) { int old, tmp; __asm__ __volatile__( "1: l.lwa %0, 0(%2) \n" " l.sfeq %0, %4 \n" " l.bf 2f \n" " l.add %1, %0, %3 \n" " l.swa 0(%2), %1 \n" " l.bnf 1b \n" " l.nop \n" "2: \n" : "=&r"(old), "=&r" (tmp) : "r"(&v->counter), "r"(a), "r"(u) : "cc", "memory"); return old; } #define __atomic_add_unless __atomic_add_unless #include <asm-generic/atomic.h> #endif /* __ASM_OPENRISC_ATOMIC_H */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
bitops | Folder | 0755 |
|
|
Kbuild | File | 997 B | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
atomic.h | File | 3.02 KB | 0644 |
|
barrier.h | File | 203 B | 0644 |
|
bitops.h | File | 1.5 KB | 0644 |
|
cache.h | File | 888 B | 0644 |
|
cacheflush.h | File | 3.37 KB | 0644 |
|
cmpxchg.h | File | 3.92 KB | 0644 |
|
cpuinfo.h | File | 970 B | 0644 |
|
delay.h | File | 670 B | 0644 |
|
dma-mapping.h | File | 968 B | 0644 |
|
elf.h | File | 2.02 KB | 0644 |
|
fixmap.h | File | 2.74 KB | 0644 |
|
futex.h | File | 2.24 KB | 0644 |
|
io.h | File | 1.31 KB | 0644 |
|
irq.h | File | 835 B | 0644 |
|
irqflags.h | File | 866 B | 0644 |
|
linkage.h | File | 764 B | 0644 |
|
mmu.h | File | 728 B | 0644 |
|
mmu_context.h | File | 1.3 KB | 0644 |
|
page.h | File | 2.54 KB | 0644 |
|
pgalloc.h | File | 2.57 KB | 0644 |
|
pgtable.h | File | 13.96 KB | 0644 |
|
processor.h | File | 2.7 KB | 0644 |
|
ptrace.h | File | 3.33 KB | 0644 |
|
serial.h | File | 1.11 KB | 0644 |
|
smp.h | File | 822 B | 0644 |
|
spinlock.h | File | 985 B | 0644 |
|
spinlock_types.h | File | 188 B | 0644 |
|
spr.h | File | 1.17 KB | 0644 |
|
spr_defs.h | File | 22.91 KB | 0644 |
|
string.h | File | 324 B | 0644 |
|
syscall.h | File | 1.91 KB | 0644 |
|
syscalls.h | File | 1.04 KB | 0644 |
|
thread_info.h | File | 3.85 KB | 0644 |
|
time.h | File | 627 B | 0644 |
|
timex.h | File | 914 B | 0644 |
|
tlb.h | File | 1.01 KB | 0644 |
|
tlbflush.h | File | 2.05 KB | 0644 |
|
uaccess.h | File | 7.98 KB | 0644 |
|
unaligned.h | File | 1.7 KB | 0644 |
|
unwinder.h | File | 557 B | 0644 |
|