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75 lines
1.6 KiB
75 lines
1.6 KiB
#include "ksia64.h"
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.file "mpipis.s"
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SBTTL("Signal Packet Done")
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//++
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//
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// VOID
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// KiIpiSignalPacketDone (
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// IN PKIPI_CONTEXT SignalDone
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// );
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//
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// Routine Description:
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//
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// This routine signals that a processor has completed a packet by
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// clearing the calling processor's set member of the requesting
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// processor's packet.
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//
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// Arguments:
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//
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// SignalDone (a0) - Supplies a pointer to the processor block of the
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// sending processor.
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//
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// N.B. The low order bit of signal done is set if the target set
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// has one and only one bit set.
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//
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// Return Value:
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//
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// None.
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//
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//--
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#if !defined(NT_UP)
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LEAF_ENTRY(KiIpiSignalPacketDone)
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tbit.nz pt0 = a0, 0
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dep a0 = 0, a0, 0, 1
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;;
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add t1 = PbTargetSet, a0
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movl t0 = KiPcr+PcSetMember
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;;
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(pt0) st8.rel [t1] = r0 // clear target set
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add t5 = PbPacketBarrier, a0
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(pt0) br.ret.spnt brp
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ld8.nt1 v0 = [t1]
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ld8 t3 = [t0]
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;;
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Kispd10:
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(pt0) YIELD
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mov ar.ccv = v0
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xor t4 = v0, t3
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;;
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cmp.eq pt3, pt4 = 0, t4
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;;
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(pt3) st8 [t1] = r0 // last processor clears target set
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mov t2 = v0
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(pt4) cmpxchg8.acq v0 = [t1], t4
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(pt3) st8.rel [t5] = r0 // last processor clears barrier
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(pt3) br.ret.spnt brp
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;;
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cmp.ne pt0, pt2 = v0, t2
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(pt2) br.ret.sptk brp
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(pt0) br.spnt Kispd10
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;;
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LEAF_EXIT(KiIpiSignalPacketDone)
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#endif
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