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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
PAG64
Control Block Contents
PAG64 DSECT
Cross Reference (Contains links to field and bit definitions)
PAG64 Control Block Content
PAG64 DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure PAG64 Page Table Entry 0000 0 Dbl-Word 8 PAGGENTR PTEs are 8 bytes in ESAME PAGGPTOM = X'FFFFFFFFFFFFF800' represents the mask that could be used to isolate Page Table Origin (PTO) given the address of a PTE. 64-bit mask X'FFFFFFFFFFFFF800' 00FFFFFF PAGGPTMH X'FFFFFFFF' Isolate high half of PTOM 00FFF800 PAGGPTML X'FFFFF800' Isolate low half of PTOM PAGGPFRA = X'FFFFFFFFFFFFF000' represents the mask that could be used to isolate the Page Frame Real Address from the address of a known PTE. NOTE that an instance of this constant exists at PFXGPFRA. 64-bit mask X'FFFFFFFFFFFFF000' 00FFFFFF PAGGPFAH X'FFFFFFFF' Isolate high half of PFRA 00FFF000 PAGGPFAL X'FFFFF000' Isolate low half of PFRA 64-bit mask X'0000000000000400' 32-bit high X'00000000' High half of mask 00000400 PAGGINVR X'00000400' Isolate I bit 64-bit mask X'0000000000000200' 32-bit high X'00000000' High half of mask 00000200 PAGGPROR X'00000200' Isolate P bit 64-bit mask X'0000000000000001' 32-bit high X'00000000' High half of mask .... ...1 PAGGLOKR X'00000001' Isolate L bit 64-bit mask X'00000000000000FE' 32-bit high X'00000000' High half of mask 1111 111. PAGGRSDR X'000000FE' Reserved for IBM use 64-bit mask X'0000000000000900' 32-bit high X'00000000' High half of mask 00000900 PAGGRSVR X'00000900' Reserved bits, must be 0 in any valid ESAME PTE The following equates may only be used when the PTE is invalid (the PTE I bit is set, meaning the page is not valid in host real storage): 64-bit mask X'0000000000000500' 32-bit high X'00000000' High half of mask 00000500 PAGGXIVR X'00000500' Isolate I bit *AND* 'valid in XSTORE' bits. This is a non-architected . software definition. 64-bit mask X'FFFFFFFF00000000' 00FFFFFF PAGGXBNH X'FFFFFFFF' Isolate XSBN .... .... PAGGXBNL X'00000000' Low half of mask This is a non-architected . software definition. 00000000 PAGGXBNBL 0 Number of bits to the left of the XSBN. Can be used for shifting. 00000020 PAGGXBNBR 32 Number of bits to the right of the XSBN. Can be used for shifting. 64-bit mask X'0000000000000004' 32-bit high X'00000000' High half of mask .... .1.. PAGGXSRR X'00000004' Isolate Xstore R bit (Reference bit) This is a non-architected . software definition. 64-bit mask X'0000000000000001' 32-bit high X'00000000' High half of mask .... ...1 PAGGXSLR X'00000001' Isolate L bit (Lock bit). This is architected for LKPG when PTE is valid. It is used by software when PTE is invalid. 0000 0 Signed 4 PAG64W0 (0) ESAME PTE Word 0 0000 0 Signed 4 PAGGPFRL Bits 0-32 of 64 bit PFRA 0004 4 Signed 4 PAG64W1 (0) ESAME PTE Word 1 0004 4 Signed 4 PAGGPFRR Bits 32-51 of 64 bit PFRA, plus 12 status bits 00000008 PAGGLENG *-PAGGENTR Length of one page table entry 0008 8 Signed 4 PAGGNEXT (0) Next page table entry 0000 0 Signed 4 * Architected as bits 0-31 of the 4K aligned page frame real address (if valid in storage). If I-bit is on, this is used by . software to store an XSTORE . block number. 0004 4 Signed 2 * Architected as bits 32-47 of the 4K aligned page frame real address (if valid in storage). If I-bit is on, this is used by . software to store part of the . PTRM virtual address. 0006 6 Bitstring 1 PAGGSTAT Architected as bits 48-51 of the 4K aligned page frame real address (if valid in storage) followed by four flag bits. If I-bit is on, this is used by . software to store part of the . PTRM virtual address. 1111 .... PAGGSPFR X'F0' Bits 48-51 of PFRA (if valid) or bits 28-31 of XSBN (if valid in xstore) .... 1..1 PAGGSMBZ X'09' Must be zero in any valid PTE .... .1.. PAGGINVA X'04' PTE is invalid: I-bit .... ..1. PAGGPROT X'02' Page protected (read only): P-bit .... .1.1 PAGGSXVA X'05' Page is invalid, but is valid in xstore This is a non-architected . software definition. 0007 7 Bitstring 1 PAGGSTA2 Contains non-architected . software definitions when . I-bit is on. Contains L-bit . when I-bit if off. 1111 111. PAGGS2PG X'FE' Reserved bits if PTE is valid Architected definitions when I-bit is off. .... ...1 PAGGS2LK X'01' Lock bit (used by LKPG) when PTE in valid. Software definitions when I-bit is on. .... .1.. PAGGS2XR X'04' R (Reference) bit if PTE is invalid, but valid in xstore .... ...1 PAGGS2XL X'01' L (Lock) bit if PTE is invalid, but valid in xstore 0000 0 Signed 4 PAGGXSBN Xstore block number. Only valid when PTE is invalid and PGSXSTOR is set in corresponding PGSTE. For MDC PTEs, only valid when PTE is invalid in real storage, but valid in xstore. This is a non-architected . software definition. 0004 4 Signed 4 * Reserved for IBM use Note that in the ESAME PTE format, unlike the ESA/390 PTE format, we use the same layout for MDC PTEs as for all other PTEs. *
PAG64 Storage Layout
*** PAG64 - Page Table Entry
*
* +-------------------------------------------------------+
* 0 | PAGGENTR |
* +-------------------------------------------------------+
* 8
*
*** PAG64 - Page Table Entry
*** Overlay for PAGGENTR in PAG64
*
* +---------------------------+---------------------------+
* 0 | PAGGPFRL | PAGGPFRR |
* +---------------------------+---------------------------+
*
*** Overlay for PAGGENTR in PAG64
*** Overlay for PAGGENTR in PAG64
*
* +---------------------------+-------------+------+------+
* 0 |///////////////////////////|/////////////|:GSTAT|:GSTA2|
* +---------------------------+-------------+------+------+
* 8
*
*** Overlay for PAGGENTR in PAG64
*** Overlay for PAGGENTR in PAG64
*
* +---------------------------+---------------------------+
* 0 | PAGGXSBN |///////////////////////////|
* +---------------------------+---------------------------+
* 8
*
*** Overlay for PAGGENTR in PAG64
PAG64 Cross Reference
Symbol Dspl Value -------------- ---- ----- PAGGENTR 0000 PAGGINVA 0006 04 PAGGINVR 0000 00000400 PAGGLENG 0004 00000008 PAGGLOKR 0000 01 PAGGNEXT 0008 PAGGPFAH 0000 00FFFFFF PAGGPFAL 0000 00FFF000 PAGGPFRL 0000 PAGGPFRR 0004 PAGGPROR 0000 00000200 PAGGPROT 0006 02 PAGGPTMH 0000 00FFFFFF PAGGPTML 0000 00FFF800 PAGGRSDR 0000 FE PAGGRSVR 0000 00000900 PAGGSMBZ 0006 09 PAGGSPFR 0006 F0 PAGGSTAT 0006 PAGGSTA2 0007 PAGGSXVA 0006 05 PAGGS2LK 0007 01 PAGGS2PG 0007 FE PAGGS2XL 0007 01 PAGGS2XR 0007 04 PAGGXBNBL 0000 00000000 PAGGXBNBR 0000 00000020 PAGGXBNH 0000 00FFFFFF PAGGXBNL 0000 00 PAGGXIVR 0000 00000500 PAGGXSBN 0000 PAGGXSLR 0000 01 PAGGXSRR 0000 04 PAG64W0 0000 PAG64W1 0004
Copyright IBM Corporation, 1990, 2001