Commit the correct patch, i.e., the one that actually corresponds
to the rev 1.2 log entry.
This commit is contained in:
Alan Cox
parent
e58bb1c453
commit
47b8bc92e8
@ -23,56 +23,76 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: atomic.h,v 1.1 1998/08/24 08:39:36 dfr Exp $
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* $Id: atomic.h,v 1.2 1999/07/13 03:32:17 alc Exp $
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*/
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#ifndef _MACHINE_ATOMIC_H_
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#define _MACHINE_ATOMIC_H_
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/*
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* Various simple arithmetic on memory which is atomic in the presence
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* of interrupts. This code is now SMP safe as well.
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* of interrupts and multiple processors.
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*
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* The assembly is volatilized to demark potential before-and-after side
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* effects if an interrupt or SMP collision were to occurs.
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* atomic_set_char(P, V) (*(u_char*)(P) |= (V))
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* atomic_clear_char(P, V) (*(u_char*)(P) &= ~(V))
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* atomic_add_char(P, V) (*(u_char*)(P) += (V))
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* atomic_subtract_char(P, V) (*(u_char*)(P) -= (V))
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*
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* atomic_set_short(P, V) (*(u_short*)(P) |= (V))
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* atomic_clear_short(P, V) (*(u_short*)(P) &= ~(V))
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* atomic_add_short(P, V) (*(u_short*)(P) += (V))
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* atomic_subtract_short(P, V) (*(u_short*)(P) -= (V))
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*
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* atomic_set_int(P, V) (*(u_int*)(P) |= (V))
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* atomic_clear_int(P, V) (*(u_int*)(P) &= ~(V))
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* atomic_add_int(P, V) (*(u_int*)(P) += (V))
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* atomic_subtract_int(P, V) (*(u_int*)(P) -= (V))
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*
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* atomic_set_long(P, V) (*(u_long*)(P) |= (V))
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* atomic_clear_long(P, V) (*(u_long*)(P) &= ~(V))
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* atomic_add_long(P, V) (*(u_long*)(P) += (V))
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* atomic_subtract_long(P, V) (*(u_long*)(P) -= (V))
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*/
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#ifdef SMP
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#define ATOMIC_ASM(NAME, TYPE, OP, V) \
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static __inline void \
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NAME(void *p, TYPE v) \
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{ \
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__asm __volatile("lock; " \
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OP : "=m" (*(TYPE *)p) : "ir" (V), "0" (*(TYPE *)p)); \
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}
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/*
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* Make kernel modules portable between UP and SMP.
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*/
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#if defined(SMP) || defined(KLD_MODULE)
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#define MPLOCKED "lock ; "
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#else
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#define ATOMIC_ASM(NAME, TYPE, OP, V) \
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static __inline void \
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NAME(void *p, TYPE v) \
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{ \
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__asm __volatile(OP : "=m" (*(TYPE *)p) : "ir" (V), "0" (*(TYPE *)p)); \
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}
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#define MPLOCKED
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#endif
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ATOMIC_ASM(atomic_set_char, u_char, "orb %1,%0", v)
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ATOMIC_ASM(atomic_clear_char, u_char, "andb %1,%0", ~v)
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ATOMIC_ASM(atomic_add_char, u_char, "addb %1,%0", v)
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ATOMIC_ASM(atomic_subtract_char,u_char, "subb %1,%0", v)
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/*
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* The assembly is volatilized to demark potential before-and-after side
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* effects if an interrupt or SMP collision were to occur.
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*/
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#define ATOMIC_ASM(NAME, TYPE, OP, V) \
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static __inline void \
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atomic_##NAME##_##TYPE(void *p, u_##TYPE v) \
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{ \
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__asm __volatile(MPLOCKED OP \
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: "=m" (*(u_##TYPE *)p) \
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: "0" (*(u_##TYPE *)p), "ir" (V)); \
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}
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ATOMIC_ASM(atomic_set_short, u_short,"orw %1,%0", v)
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ATOMIC_ASM(atomic_clear_short, u_short,"andw %1,%0", ~v)
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ATOMIC_ASM(atomic_add_short, u_short,"addw %1,%0", v)
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ATOMIC_ASM(atomic_subtract_short,u_short,"subw %1,%0", v)
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ATOMIC_ASM(set, char, "orb %2,%0", v)
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ATOMIC_ASM(clear, char, "andb %2,%0", ~v)
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ATOMIC_ASM(add, char, "addb %2,%0", v)
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ATOMIC_ASM(subtract, char, "subb %2,%0", v)
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ATOMIC_ASM(atomic_set_int, u_int, "orl %1,%0", v)
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ATOMIC_ASM(atomic_clear_int, u_int, "andl %1,%0", ~v)
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ATOMIC_ASM(atomic_add_int, u_int, "addl %1,%0", v)
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ATOMIC_ASM(atomic_subtract_int, u_int, "subl %1,%0", v)
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ATOMIC_ASM(set, short, "orw %2,%0", v)
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ATOMIC_ASM(clear, short, "andw %2,%0", ~v)
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ATOMIC_ASM(add, short, "addw %2,%0", v)
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ATOMIC_ASM(subtract, short, "subw %2,%0", v)
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ATOMIC_ASM(atomic_set_long, u_long, "orl %1,%0", v)
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ATOMIC_ASM(atomic_clear_long, u_long, "andl %1,%0", ~v)
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ATOMIC_ASM(atomic_add_long, u_long, "addl %1,%0", v)
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ATOMIC_ASM(atomic_subtract_long,u_long, "subl %1,%0", v)
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ATOMIC_ASM(set, int, "orl %2,%0", v)
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ATOMIC_ASM(clear, int, "andl %2,%0", ~v)
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ATOMIC_ASM(add, int, "addl %2,%0", v)
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ATOMIC_ASM(subtract, int, "subl %2,%0", v)
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#undef ATOMIC_ASM
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ATOMIC_ASM(set, long, "orl %2,%0", v)
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ATOMIC_ASM(clear, long, "andl %2,%0", ~v)
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ATOMIC_ASM(add, long, "addl %2,%0", v)
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ATOMIC_ASM(subtract, long, "subl %2,%0", v)
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#endif /* ! _MACHINE_ATOMIC_H_ */
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@ -23,56 +23,76 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: atomic.h,v 1.1 1998/08/24 08:39:36 dfr Exp $
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* $Id: atomic.h,v 1.2 1999/07/13 03:32:17 alc Exp $
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*/
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#ifndef _MACHINE_ATOMIC_H_
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#define _MACHINE_ATOMIC_H_
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/*
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* Various simple arithmetic on memory which is atomic in the presence
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* of interrupts. This code is now SMP safe as well.
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* of interrupts and multiple processors.
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*
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* The assembly is volatilized to demark potential before-and-after side
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* effects if an interrupt or SMP collision were to occurs.
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* atomic_set_char(P, V) (*(u_char*)(P) |= (V))
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* atomic_clear_char(P, V) (*(u_char*)(P) &= ~(V))
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* atomic_add_char(P, V) (*(u_char*)(P) += (V))
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* atomic_subtract_char(P, V) (*(u_char*)(P) -= (V))
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*
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* atomic_set_short(P, V) (*(u_short*)(P) |= (V))
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* atomic_clear_short(P, V) (*(u_short*)(P) &= ~(V))
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* atomic_add_short(P, V) (*(u_short*)(P) += (V))
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* atomic_subtract_short(P, V) (*(u_short*)(P) -= (V))
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*
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* atomic_set_int(P, V) (*(u_int*)(P) |= (V))
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* atomic_clear_int(P, V) (*(u_int*)(P) &= ~(V))
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* atomic_add_int(P, V) (*(u_int*)(P) += (V))
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* atomic_subtract_int(P, V) (*(u_int*)(P) -= (V))
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*
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* atomic_set_long(P, V) (*(u_long*)(P) |= (V))
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* atomic_clear_long(P, V) (*(u_long*)(P) &= ~(V))
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* atomic_add_long(P, V) (*(u_long*)(P) += (V))
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* atomic_subtract_long(P, V) (*(u_long*)(P) -= (V))
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*/
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#ifdef SMP
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#define ATOMIC_ASM(NAME, TYPE, OP, V) \
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static __inline void \
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NAME(void *p, TYPE v) \
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{ \
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__asm __volatile("lock; " \
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OP : "=m" (*(TYPE *)p) : "ir" (V), "0" (*(TYPE *)p)); \
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}
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/*
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* Make kernel modules portable between UP and SMP.
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*/
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#if defined(SMP) || defined(KLD_MODULE)
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#define MPLOCKED "lock ; "
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#else
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#define ATOMIC_ASM(NAME, TYPE, OP, V) \
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static __inline void \
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NAME(void *p, TYPE v) \
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{ \
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__asm __volatile(OP : "=m" (*(TYPE *)p) : "ir" (V), "0" (*(TYPE *)p)); \
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}
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#define MPLOCKED
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#endif
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ATOMIC_ASM(atomic_set_char, u_char, "orb %1,%0", v)
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ATOMIC_ASM(atomic_clear_char, u_char, "andb %1,%0", ~v)
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ATOMIC_ASM(atomic_add_char, u_char, "addb %1,%0", v)
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ATOMIC_ASM(atomic_subtract_char,u_char, "subb %1,%0", v)
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/*
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* The assembly is volatilized to demark potential before-and-after side
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* effects if an interrupt or SMP collision were to occur.
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*/
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#define ATOMIC_ASM(NAME, TYPE, OP, V) \
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static __inline void \
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atomic_##NAME##_##TYPE(void *p, u_##TYPE v) \
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{ \
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__asm __volatile(MPLOCKED OP \
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: "=m" (*(u_##TYPE *)p) \
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: "0" (*(u_##TYPE *)p), "ir" (V)); \
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}
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ATOMIC_ASM(atomic_set_short, u_short,"orw %1,%0", v)
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ATOMIC_ASM(atomic_clear_short, u_short,"andw %1,%0", ~v)
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ATOMIC_ASM(atomic_add_short, u_short,"addw %1,%0", v)
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ATOMIC_ASM(atomic_subtract_short,u_short,"subw %1,%0", v)
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ATOMIC_ASM(set, char, "orb %2,%0", v)
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ATOMIC_ASM(clear, char, "andb %2,%0", ~v)
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ATOMIC_ASM(add, char, "addb %2,%0", v)
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ATOMIC_ASM(subtract, char, "subb %2,%0", v)
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ATOMIC_ASM(atomic_set_int, u_int, "orl %1,%0", v)
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ATOMIC_ASM(atomic_clear_int, u_int, "andl %1,%0", ~v)
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ATOMIC_ASM(atomic_add_int, u_int, "addl %1,%0", v)
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ATOMIC_ASM(atomic_subtract_int, u_int, "subl %1,%0", v)
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ATOMIC_ASM(set, short, "orw %2,%0", v)
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ATOMIC_ASM(clear, short, "andw %2,%0", ~v)
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ATOMIC_ASM(add, short, "addw %2,%0", v)
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ATOMIC_ASM(subtract, short, "subw %2,%0", v)
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ATOMIC_ASM(atomic_set_long, u_long, "orl %1,%0", v)
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ATOMIC_ASM(atomic_clear_long, u_long, "andl %1,%0", ~v)
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ATOMIC_ASM(atomic_add_long, u_long, "addl %1,%0", v)
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ATOMIC_ASM(atomic_subtract_long,u_long, "subl %1,%0", v)
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ATOMIC_ASM(set, int, "orl %2,%0", v)
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ATOMIC_ASM(clear, int, "andl %2,%0", ~v)
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ATOMIC_ASM(add, int, "addl %2,%0", v)
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ATOMIC_ASM(subtract, int, "subl %2,%0", v)
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#undef ATOMIC_ASM
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ATOMIC_ASM(set, long, "orl %2,%0", v)
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ATOMIC_ASM(clear, long, "andl %2,%0", ~v)
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ATOMIC_ASM(add, long, "addl %2,%0", v)
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ATOMIC_ASM(subtract, long, "subl %2,%0", v)
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#endif /* ! _MACHINE_ATOMIC_H_ */
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