1 /* 2 * LparMap.h 3 * Copyright (C) 2001 Mike Corrigan IBM Corporation 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 20 #ifndef _PPC_TYPES_H 21 #include <asm/types.h> 22 #endif 23 24 #ifndef _LPARMAP_H 25 #define _LPARMAP_H 26 27 /* The iSeries hypervisor will set up mapping for one or more 28 * ESID/VSID pairs (in SLB/segment registers) and will set up 29 * mappings of one or more ranges of pages to VAs. 30 * We will have the hypervisor set up the ESID->VSID mapping 31 * for the four kernel segments (C-F). With shared processors, 32 * the hypervisor will clear all segment registers and reload 33 * these four whenever the processor is switched from one 34 * partition to another. 35 */ 36 37 /* The Vsid and Esid identified below will be used by the hypervisor 38 * to set up a memory mapping for part of the load area before giving 39 * control to the Linux kernel. The load area is 64 MB, but this must 40 * not attempt to map the whole load area. The Hashed Page Table may 41 * need to be located within the load area (if the total partition size 42 * is 64 MB), but cannot be mapped. Typically, this should specify 43 * to map half (32 MB) of the load area. 44 * 45 * The hypervisor will set up page table entries for the number of 46 * pages specified. 47 * 48 * In 32-bit mode, the hypervisor will load all four of the 49 * segment registers (identified by the low-order four bits of the 50 * Esid field. In 64-bit mode, the hypervisor will load one SLB 51 * entry to map the Esid to the Vsid. 52 */ 53 54 // Hypervisor initially maps 32MB of the load area 55 #define HvPagesToMap 8192 56 57 struct LparMap 58 { 59 u64 xNumberEsids; // Number of ESID/VSID pairs (1) 60 u64 xNumberRanges; // Number of VA ranges to map (1) 61 u64 xSegmentTableOffs; // Page number within load area of seg table (0) 62 u64 xRsvd[5]; // Reserved (0) 63 u64 xKernelEsid; // Esid used to map kernel load (0x0C00000000) 64 u64 xKernelVsid; // Vsid used to map kernel load (0x0C00000000) 65 u64 xPages; // Number of pages to be mapped (8192) 66 u64 xOffset; // Offset from start of load area (0) 67 u64 xVPN; // Virtual Page Number (0x000C000000000000) 68 }; 69 70 #endif /* _LPARMAP_H */ 71