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Prolog Control Block Contents SDNX DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
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SDNX Prolog | Top of page |
NAME : HCPSDNX DESCRIPTION: State Description Annex DSECT : SDNX FUNCTION : Maps the State Description Annex LOCATED BY : SIESDNXD field in SIEBK (host real) CREATED BY : HCPSDN when a guest first attempts to use a feature requiring an SD annex. DELETED BY : HCPSDN during RESET CLEAR, LOGOFF or DETACH CPU processing REFERENCES : None SERIALIZED : RELOCATION CONSIDERATIONS : This control block is relocated as part of a live guest relocation (LGR). The bits and fields that need to be relocated are defined in the corresponding LGRSDNX COPY file. Whenever changes are made to this control block, consideration must be given to any effects these changes will have on a relocation. If any new fields or bits are defined, they may need to be relocated. If existing bits or fields are changed, corresponding modifications may be required in the LGR version of this control block. Consider also the effects of these changes on a relocation involving a back-level release of CP. COMPATIBILITY AND MIGRATION CONCERNS : The format of this control block is defined by the z/Architecture CPU Architecture. GENERAL NOTES : Although the architecture defines the minimum size for an SD annex to be 64 bytes, this implementation uses a minimum of 256 bytes so as to ensure cache- line alignment. |
SDNX Control Block Content | Top of page |
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SDNX Storage Layout | Top of page |
*** SDNX - State Description Annex * * +---------------------------+---------------------------+ * 0 | SDNXEYE | SDNXVMD | * +---------------------------+---------------------------+ * 8 |///////////////////////////////////////////////////////| * +-------------------------------------------------------+ * 10 | | * = SDNXGSCB = * | | * +-------------------------------------------------------+ * 30 | SDNXIBM1 | * | | * +------+------------------------------------------------+ * 40 |//////|////////////////////////////////////////////////| * +------+////////////////////////////////////////////////| * 48 |///////////////////////////////////////////////////////| * =///////////////////////////////////////////////////////= * |///////////////////////////////////////////////////////| * +-------------------------------------------------------+ * 100 * *** SDNX - State Description Annex |
SDNX Cross Reference | Top of page |
Symbol Dspl Value -------------- ---- ----- SDNXC 0030 00000008 SDNXDLEN 0030 00000040 SDNXEYE 0000 SDNXGSCB 0010 SDNXIBM1 0030 SDNXPROG 0000 SDNXSIZE 0030 00000020 SDNXSYSA 0008 SDNXVMD 0004 |
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