patch-2.4.19 linux-2.4.19/include/asm-ppc64/iSeries/LparMap.h

• Lines: 71
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/asm-ppc64/iSeries/LparMap.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/include/asm-ppc64/iSeries/LparMap.h linux-2.4.19/include/asm-ppc64/iSeries/LparMap.h
@@ -0,0 +1,70 @@
+/*
+ * LparMap.h
+ * Copyright (C) 2001  Mike Corrigan IBM Corporation
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#ifndef	_PPC_TYPES_H
+#include	<asm/types.h>
+#endif
+
+#ifndef _LPARMAP_H
+#define _LPARMAP_H
+
+/* The iSeries hypervisor will set up mapping for one or more 
+ * ESID/VSID pairs (in SLB/segment registers) and will set up
+ * mappings of one or more ranges of pages to VAs.
+ * We will have the hypervisor set up the ESID->VSID mapping
+ * for the four kernel segments (C-F).  With shared processors,
+ * the hypervisor will clear all segment registers and reload
+ * these four whenever the processor is switched from one 
+ * partition to another.
+ */
+
+/* The Vsid and Esid identified below will be used by the hypervisor
+ * to set up a memory mapping for part of the load area before giving
+ * control to the Linux kernel.  The load area is 64 MB, but this must
+ * not attempt to map the whole load area.  The Hashed Page Table may
+ * need to be located within the load area (if the total partition size
+ * is 64 MB), but cannot be mapped.  Typically, this should specify
+ * to map half (32 MB) of the load area.
+ * 
+ * The hypervisor will set up page table entries for the number of 
+ * pages specified.
+ *
+ * In 32-bit mode, the hypervisor will load all four of the
+ * segment registers (identified by the low-order four bits of the 
+ * Esid field.  In 64-bit mode, the hypervisor will load one SLB
+ * entry to map the Esid to the Vsid.
+*/
+
+// Hypervisor initially maps 32MB of the load area 
+#define HvPagesToMap 8192
+
+struct LparMap
+{
+	u64	  xNumberEsids;		// Number of ESID/VSID pairs (1)
+	u64	  xNumberRanges;	// Number of VA ranges to map (1)
+	u64	  xSegmentTableOffs;	// Page number within load area of seg table (0)
+	u64	  xRsvd[5];		// Reserved (0)
+	u64	  xKernelEsid;  	// Esid used to map kernel load (0x0C00000000)	
+	u64	  xKernelVsid;		// Vsid used to map kernel load (0x0C00000000)
+	u64	  xPages;		// Number of pages to be mapped	(8192)
+	u64	  xOffset;		// Offset from start of load area (0)
+	u64	  xVPN;			// Virtual Page Number (0x000C000000000000)
+};
+
+#endif /* _LPARMAP_H */