/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ARCH_M68K_ATOMIC__ #define __ARCH_M68K_ATOMIC__ #include <linux/types.h> #include <linux/irqflags.h> #include <asm/cmpxchg.h> #include <asm/barrier.h> /* * Atomic operations that C can't guarantee us. Useful for * resource counting etc.. */ /* * We do not have SMP m68k systems, so we don't have to deal with that. */ #define ATOMIC_INIT(i) { (i) } #define atomic_read(v) READ_ONCE((v)->counter) #define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i)) /* * The ColdFire parts cannot do some immediate to memory operations, * so for them we do not specify the "i" asm constraint. */ #ifdef CONFIG_COLDFIRE #define ASM_DI "d" #else #define ASM_DI "di" #endif #define ATOMIC_OP(op, c_op, asm_op) \ static inline void atomic_##op(int i, atomic_t *v) \ { \ __asm__ __volatile__(#asm_op "l %1,%0" : "+m" (*v) : ASM_DI (i));\ } \ #ifdef CONFIG_RMW_INSNS #define ATOMIC_OP_RETURN(op, c_op, asm_op) \ static inline int atomic_##op##_return(int i, atomic_t *v) \ { \ int t, tmp; \ \ __asm__ __volatile__( \ "1: movel %2,%1\n" \ " " #asm_op "l %3,%1\n" \ " casl %2,%1,%0\n" \ " jne 1b" \ : "+m" (*v), "=&d" (t), "=&d" (tmp) \ : "g" (i), "2" (atomic_read(v))); \ return t; \ } #define ATOMIC_FETCH_OP(op, c_op, asm_op) \ static inline int atomic_fetch_##op(int i, atomic_t *v) \ { \ int t, tmp; \ \ __asm__ __volatile__( \ "1: movel %2,%1\n" \ " " #asm_op "l %3,%1\n" \ " casl %2,%1,%0\n" \ " jne 1b" \ : "+m" (*v), "=&d" (t), "=&d" (tmp) \ : "g" (i), "2" (atomic_read(v))); \ return tmp; \ } #else #define ATOMIC_OP_RETURN(op, c_op, asm_op) \ static inline int atomic_##op##_return(int i, atomic_t * v) \ { \ unsigned long flags; \ int t; \ \ local_irq_save(flags); \ t = (v->counter c_op i); \ local_irq_restore(flags); \ \ return t; \ } #define ATOMIC_FETCH_OP(op, c_op, asm_op) \ static inline int atomic_fetch_##op(int i, atomic_t * v) \ { \ unsigned long flags; \ int t; \ \ local_irq_save(flags); \ t = v->counter; \ v->counter c_op i; \ local_irq_restore(flags); \ \ return t; \ } #endif /* CONFIG_RMW_INSNS */ #define ATOMIC_OPS(op, c_op, asm_op) \ ATOMIC_OP(op, c_op, asm_op) \ ATOMIC_OP_RETURN(op, c_op, asm_op) \ ATOMIC_FETCH_OP(op, c_op, asm_op) ATOMIC_OPS(add, +=, add) ATOMIC_OPS(sub, -=, sub) #undef ATOMIC_OPS #define ATOMIC_OPS(op, c_op, asm_op) \ ATOMIC_OP(op, c_op, asm_op) \ ATOMIC_FETCH_OP(op, c_op, asm_op) ATOMIC_OPS(and, &=, and) ATOMIC_OPS(or, |=, or) ATOMIC_OPS(xor, ^=, eor) #undef ATOMIC_OPS #undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN #undef ATOMIC_OP static inline void atomic_inc(atomic_t *v) { __asm__ __volatile__("addql #1,%0" : "+m" (*v)); } static inline void atomic_dec(atomic_t *v) { __asm__ __volatile__("subql #1,%0" : "+m" (*v)); } static inline int atomic_dec_and_test(atomic_t *v) { char c; __asm__ __volatile__("subql #1,%1; seq %0" : "=d" (c), "+m" (*v)); return c != 0; } static inline int atomic_dec_and_test_lt(atomic_t *v) { char c; __asm__ __volatile__( "subql #1,%1; slt %0" : "=d" (c), "=m" (*v) : "m" (*v)); return c != 0; } static inline int atomic_inc_and_test(atomic_t *v) { char c; __asm__ __volatile__("addql #1,%1; seq %0" : "=d" (c), "+m" (*v)); return c != 0; } #ifdef CONFIG_RMW_INSNS #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) #else /* !CONFIG_RMW_INSNS */ static inline int atomic_cmpxchg(atomic_t *v, int old, int new) { unsigned long flags; int prev; local_irq_save(flags); prev = atomic_read(v); if (prev == old) atomic_set(v, new); local_irq_restore(flags); return prev; } static inline int atomic_xchg(atomic_t *v, int new) { unsigned long flags; int prev; local_irq_save(flags); prev = atomic_read(v); atomic_set(v, new); local_irq_restore(flags); return prev; } #endif /* !CONFIG_RMW_INSNS */ #define atomic_dec_return(v) atomic_sub_return(1, (v)) #define atomic_inc_return(v) atomic_add_return(1, (v)) static inline int atomic_sub_and_test(int i, atomic_t *v) { char c; __asm__ __volatile__("subl %2,%1; seq %0" : "=d" (c), "+m" (*v) : ASM_DI (i)); return c != 0; } static inline int atomic_add_negative(int i, atomic_t *v) { char c; __asm__ __volatile__("addl %2,%1; smi %0" : "=d" (c), "+m" (*v) : ASM_DI (i)); return c != 0; } 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 /* __ARCH_M68K_ATOMIC __ */
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Kbuild | File | 599 B | 0644 |
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MC68328.h | File | 37.82 KB | 0644 |
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MC68EZ328.h | File | 37.74 KB | 0644 |
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MC68VZ328.h | File | 41.02 KB | 0644 |
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a.out-core.h | File | 1.98 KB | 0644 |
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adb_iop.h | File | 1.09 KB | 0644 |
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amigahw.h | File | 10.49 KB | 0644 |
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amigaints.h | File | 3.5 KB | 0644 |
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amigayle.h | File | 3.19 KB | 0644 |
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amipcmcia.h | File | 2.51 KB | 0644 |
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apollohw.h | File | 2.35 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 211 B | 0644 |
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atafd.h | File | 300 B | 0644 |
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atafdreg.h | File | 2.68 KB | 0644 |
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atari_joystick.h | File | 457 B | 0644 |
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atari_stdma.h | File | 514 B | 0644 |
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atari_stram.h | File | 528 B | 0644 |
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atarihw.h | File | 20.3 KB | 0644 |
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atariints.h | File | 5.56 KB | 0644 |
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atarikb.h | File | 1.4 KB | 0644 |
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atomic.h | File | 4.86 KB | 0644 |
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bitops.h | File | 12.19 KB | 0644 |
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blinken.h | File | 641 B | 0644 |
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bootinfo.h | File | 783 B | 0644 |
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bootstd.h | File | 4.64 KB | 0644 |
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bug.h | File | 659 B | 0644 |
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bugs.h | File | 369 B | 0644 |
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bvme6000hw.h | File | 3.45 KB | 0644 |
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cache.h | File | 296 B | 0644 |
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cacheflush.h | File | 133 B | 0644 |
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cacheflush_mm.h | File | 6.92 KB | 0644 |
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cacheflush_no.h | File | 2.61 KB | 0644 |
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checksum.h | File | 3.4 KB | 0644 |
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cmpxchg.h | File | 3.34 KB | 0644 |
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coldfire.h | File | 1.61 KB | 0644 |
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contregs.h | File | 3.31 KB | 0644 |
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current.h | File | 580 B | 0644 |
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delay.h | File | 3.43 KB | 0644 |
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div64.h | File | 858 B | 0644 |
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dma-mapping.h | File | 291 B | 0644 |
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dma.h | File | 16.65 KB | 0644 |
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dsp56k.h | File | 1.24 KB | 0644 |
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dvma.h | File | 9.67 KB | 0644 |
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elf.h | File | 3.07 KB | 0644 |
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entry.h | File | 5.76 KB | 0644 |
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export.h | File | 74 B | 0644 |
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fb.h | File | 921 B | 0644 |
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fbio.h | File | 9.87 KB | 0644 |
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flat.h | File | 1.02 KB | 0644 |
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floppy.h | File | 5.06 KB | 0644 |
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fpu.h | File | 535 B | 0644 |
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ftrace.h | File | 12 B | 0644 |
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gpio.h | File | 2.64 KB | 0644 |
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hardirq.h | File | 594 B | 0644 |
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hash.h | File | 2.07 KB | 0644 |
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hp300hw.h | File | 186 B | 0644 |
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hwtest.h | File | 467 B | 0644 |
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ide.h | File | 1.67 KB | 0644 |
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idprom.h | File | 725 B | 0644 |
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intersil.h | File | 1.11 KB | 0644 |
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io.h | File | 383 B | 0644 |
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io_mm.h | File | 16.19 KB | 0644 |
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io_no.h | File | 5.26 KB | 0644 |
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irq.h | File | 2.57 KB | 0644 |
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irqflags.h | File | 1.61 KB | 0644 |
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kexec.h | File | 732 B | 0644 |
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linkage.h | File | 1.55 KB | 0644 |
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m5206sim.h | File | 6.4 KB | 0644 |
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m520xsim.h | File | 7.15 KB | 0644 |
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m523xsim.h | File | 7.7 KB | 0644 |
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m5272sim.h | File | 6.05 KB | 0644 |
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m528xsim.h | File | 9.37 KB | 0644 |
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m52xxacr.h | File | 3.57 KB | 0644 |
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m5407sim.h | File | 6.14 KB | 0644 |
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m5441xsim.h | File | 8.5 KB | 0644 |
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m54xxacr.h | File | 4.82 KB | 0644 |
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m54xxgpt.h | File | 3.66 KB | 0644 |
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m54xxpci.h | File | 6.13 KB | 0644 |
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m54xxsim.h | File | 3.8 KB | 0644 |
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mac_asc.h | File | 520 B | 0644 |
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mac_baboon.h | File | 999 B | 0644 |
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mac_iop.h | File | 5.37 KB | 0644 |
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mac_oss.h | File | 1.83 KB | 0644 |
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mac_psc.h | File | 7.25 KB | 0644 |
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mac_via.h | File | 11.44 KB | 0644 |
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machdep.h | File | 1.34 KB | 0644 |
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machines.h | File | 3.13 KB | 0644 |
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machw.h | File | 588 B | 0644 |
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macintosh.h | File | 2.02 KB | 0644 |
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macints.h | File | 3.28 KB | 0644 |
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math-emu.h | File | 6.74 KB | 0644 |
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mc146818rtc.h | File | 598 B | 0644 |
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mcf8390.h | File | 3.75 KB | 0644 |
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mcf_pgalloc.h | File | 2.37 KB | 0644 |
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mcf_pgtable.h | File | 9.89 KB | 0644 |
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mcfclk.h | File | 1.01 KB | 0644 |
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mcfdma.h | File | 6.51 KB | 0644 |
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mcfgpio.h | File | 8.48 KB | 0644 |
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mcfintc.h | File | 3.09 KB | 0644 |
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mcfmmu.h | File | 3.67 KB | 0644 |
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mcfpit.h | File | 2.22 KB | 0644 |
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mcfqspi.h | File | 1.82 KB | 0644 |
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mcfsim.h | File | 1.5 KB | 0644 |
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mcfslt.h | File | 1.21 KB | 0644 |
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mcftimer.h | File | 2.3 KB | 0644 |
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mcfuart.h | File | 6.91 KB | 0644 |
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mcfwdebug.h | File | 4.99 KB | 0644 |
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mmu.h | File | 243 B | 0644 |
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mmu_context.h | File | 7.2 KB | 0644 |
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mmzone.h | File | 264 B | 0644 |
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module.h | File | 847 B | 0644 |
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motorola_pgalloc.h | File | 2.26 KB | 0644 |
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motorola_pgtable.h | File | 9.2 KB | 0644 |
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movs.h | File | 1.44 KB | 0644 |
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mvme147hw.h | File | 2.81 KB | 0644 |
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mvme16xhw.h | File | 2.16 KB | 0644 |
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natfeat.h | File | 533 B | 0644 |
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nettel.h | File | 2.95 KB | 0644 |
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nubus.h | File | 1.21 KB | 0644 |
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openprom.h | File | 7.98 KB | 0644 |
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oplib.h | File | 9.54 KB | 0644 |
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page.h | File | 1.47 KB | 0644 |
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page_mm.h | File | 4.06 KB | 0644 |
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page_no.h | File | 1.28 KB | 0644 |
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page_offset.h | File | 256 B | 0644 |
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parport.h | File | 837 B | 0644 |
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pci.h | File | 458 B | 0644 |
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pgalloc.h | File | 444 B | 0644 |
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pgtable.h | File | 127 B | 0644 |
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pgtable_mm.h | File | 4.84 KB | 0644 |
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pgtable_no.h | File | 1.57 KB | 0644 |
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processor.h | File | 3.59 KB | 0644 |
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ptrace.h | File | 643 B | 0644 |
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q40_master.h | File | 2.28 KB | 0644 |
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q40ints.h | File | 749 B | 0644 |
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quicc_simple.h | File | 1.79 KB | 0644 |
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raw_io.h | File | 11.41 KB | 0644 |
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segment.h | File | 1.42 KB | 0644 |
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serial.h | File | 1.14 KB | 0644 |
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setup.h | File | 9.25 KB | 0644 |
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signal.h | File | 1.34 KB | 0644 |
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smp.h | File | 32 B | 0644 |
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string.h | File | 1.68 KB | 0644 |
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sun3-head.h | File | 353 B | 0644 |
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sun3_pgalloc.h | File | 2.26 KB | 0644 |
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sun3_pgtable.h | File | 7.65 KB | 0644 |
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sun3ints.h | File | 989 B | 0644 |
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sun3mmu.h | File | 4.91 KB | 0644 |
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sun3x.h | File | 868 B | 0644 |
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sun3xflop.h | File | 5.62 KB | 0644 |
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sun3xprom.h | File | 1.31 KB | 0644 |
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switch_to.h | File | 1.51 KB | 0644 |
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thread_info.h | File | 2.02 KB | 0644 |
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timex.h | File | 974 B | 0644 |
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tlb.h | File | 486 B | 0644 |
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tlbflush.h | File | 5.95 KB | 0644 |
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traps.h | File | 8.33 KB | 0644 |
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uaccess.h | File | 152 B | 0644 |
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uaccess_mm.h | File | 10.31 KB | 0644 |
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uaccess_no.h | File | 3.69 KB | 0644 |
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ucontext.h | File | 570 B | 0644 |
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unaligned.h | File | 600 B | 0644 |
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unistd.h | File | 952 B | 0644 |
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user.h | File | 3.78 KB | 0644 |
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vga.h | File | 651 B | 0644 |
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virtconvert.h | File | 947 B | 0644 |
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zorro.h | File | 1.17 KB | 0644 |
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