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124 SPARC JPS1 Implementation Supplement: Fujitsu SPARC64 V • Release 1.0, 1 July 2002
Last Barrier Synchronization Status Read (ASI_LBSYR0,
ASI_LBSYR1)
ASI_LBSYRx is a read interface to the copy of LBSY. A write to ASI_LBSYRx is
ignored.
Barrier State Write (ASI_BSTW0, ASI_BSTW1)
ASI_BSTWx is a write interface to LBSY on the SB. On read, 0 is returned.
[1] Register Name: ASI_LBSYR0, ASI_LBSYR1
[2] ASI: EF
16
[3] VA: 00
16
(ASI_LBSYR0), 08
16
(ASI_LBSYR1).
[4] RW Read (Write is ignored)
Bit Name RW Description
0 RV R Read value. The bit designated by ASI_C_LBSYRx is shown.
[1] Register Name: ASI_BSTW0, ASI_BSTW1
[2] ASI: EF
16
[3] VA: 80
16
(ASI_BSTW0), 88
16
(ASI_BSTW1).
[4] RW Write (0 is returned on read)
Bit Name RW Description
0 WV W Write value. The bit designated by ASI_C_BSTWx is written.