Disintegrate asm/system.h for M32R
Disintegrate asm/system.h for M32R. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-m32r@ml.linux-m32r.org
This commit is contained in:
David Howells
221
arch/m32r/include/asm/cmpxchg.h
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221
arch/m32r/include/asm/cmpxchg.h
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#ifndef _ASM_M32R_CMPXCHG_H
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#define _ASM_M32R_CMPXCHG_H
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/*
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* M32R version:
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* Copyright (C) 2001, 2002 Hitoshi Yamamoto
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* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
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*/
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#include <linux/irqflags.h>
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#include <asm/assembler.h>
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#include <asm/dcache_clear.h>
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extern void __xchg_called_with_bad_pointer(void);
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static __always_inline unsigned long
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__xchg(unsigned long x, volatile void *ptr, int size)
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{
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unsigned long flags;
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unsigned long tmp = 0;
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local_irq_save(flags);
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switch (size) {
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#ifndef CONFIG_SMP
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case 1:
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__asm__ __volatile__ (
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"ldb %0, @%2 \n\t"
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"stb %1, @%2 \n\t"
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: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
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break;
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case 2:
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__asm__ __volatile__ (
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"ldh %0, @%2 \n\t"
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"sth %1, @%2 \n\t"
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: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
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break;
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case 4:
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__asm__ __volatile__ (
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"ld %0, @%2 \n\t"
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"st %1, @%2 \n\t"
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: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
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break;
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#else /* CONFIG_SMP */
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case 4:
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__asm__ __volatile__ (
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DCACHE_CLEAR("%0", "r4", "%2")
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"lock %0, @%2; \n\t"
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"unlock %1, @%2; \n\t"
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: "=&r" (tmp) : "r" (x), "r" (ptr)
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: "memory"
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#ifdef CONFIG_CHIP_M32700_TS1
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, "r4"
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#endif /* CONFIG_CHIP_M32700_TS1 */
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);
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break;
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#endif /* CONFIG_SMP */
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default:
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__xchg_called_with_bad_pointer();
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}
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local_irq_restore(flags);
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return (tmp);
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}
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#define xchg(ptr, x) \
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((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
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static __always_inline unsigned long
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__xchg_local(unsigned long x, volatile void *ptr, int size)
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{
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unsigned long flags;
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unsigned long tmp = 0;
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local_irq_save(flags);
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switch (size) {
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case 1:
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__asm__ __volatile__ (
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"ldb %0, @%2 \n\t"
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"stb %1, @%2 \n\t"
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: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
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break;
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case 2:
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__asm__ __volatile__ (
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"ldh %0, @%2 \n\t"
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"sth %1, @%2 \n\t"
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: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
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break;
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case 4:
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__asm__ __volatile__ (
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"ld %0, @%2 \n\t"
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"st %1, @%2 \n\t"
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: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
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break;
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default:
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__xchg_called_with_bad_pointer();
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}
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local_irq_restore(flags);
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return (tmp);
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}
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#define xchg_local(ptr, x) \
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((__typeof__(*(ptr)))__xchg_local((unsigned long)(x), (ptr), \
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sizeof(*(ptr))))
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#define __HAVE_ARCH_CMPXCHG 1
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static inline unsigned long
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__cmpxchg_u32(volatile unsigned int *p, unsigned int old, unsigned int new)
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{
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unsigned long flags;
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unsigned int retval;
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local_irq_save(flags);
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__asm__ __volatile__ (
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DCACHE_CLEAR("%0", "r4", "%1")
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M32R_LOCK" %0, @%1; \n"
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" bne %0, %2, 1f; \n"
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M32R_UNLOCK" %3, @%1; \n"
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" bra 2f; \n"
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" .fillinsn \n"
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"1:"
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M32R_UNLOCK" %0, @%1; \n"
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" .fillinsn \n"
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"2:"
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: "=&r" (retval)
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: "r" (p), "r" (old), "r" (new)
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: "cbit", "memory"
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#ifdef CONFIG_CHIP_M32700_TS1
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, "r4"
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#endif /* CONFIG_CHIP_M32700_TS1 */
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);
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local_irq_restore(flags);
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return retval;
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}
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static inline unsigned long
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__cmpxchg_local_u32(volatile unsigned int *p, unsigned int old,
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unsigned int new)
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{
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unsigned long flags;
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unsigned int retval;
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local_irq_save(flags);
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__asm__ __volatile__ (
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DCACHE_CLEAR("%0", "r4", "%1")
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"ld %0, @%1; \n"
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" bne %0, %2, 1f; \n"
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"st %3, @%1; \n"
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" bra 2f; \n"
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" .fillinsn \n"
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"1:"
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"st %0, @%1; \n"
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" .fillinsn \n"
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"2:"
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: "=&r" (retval)
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: "r" (p), "r" (old), "r" (new)
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: "cbit", "memory"
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#ifdef CONFIG_CHIP_M32700_TS1
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, "r4"
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#endif /* CONFIG_CHIP_M32700_TS1 */
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);
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local_irq_restore(flags);
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return retval;
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}
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/* This function doesn't exist, so you'll get a linker error
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if something tries to do an invalid cmpxchg(). */
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extern void __cmpxchg_called_with_bad_pointer(void);
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static inline unsigned long
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__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
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{
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switch (size) {
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case 4:
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return __cmpxchg_u32(ptr, old, new);
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#if 0 /* we don't have __cmpxchg_u64 */
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case 8:
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return __cmpxchg_u64(ptr, old, new);
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#endif /* 0 */
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}
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__cmpxchg_called_with_bad_pointer();
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return old;
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}
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#define cmpxchg(ptr, o, n) \
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((__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)(o), \
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(unsigned long)(n), sizeof(*(ptr))))
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#include <asm-generic/cmpxchg-local.h>
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static inline unsigned long __cmpxchg_local(volatile void *ptr,
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unsigned long old,
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unsigned long new, int size)
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{
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switch (size) {
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case 4:
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return __cmpxchg_local_u32(ptr, old, new);
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default:
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return __cmpxchg_local_generic(ptr, old, new, size);
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}
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return old;
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}
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/*
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* cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
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* them available.
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*/
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#define cmpxchg_local(ptr, o, n) \
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((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
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(unsigned long)(n), sizeof(*(ptr))))
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#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
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#endif /* _ASM_M32R_CMPXCHG_H */
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