2 * Copyright (C) 2001 Mike Corrigan IBM Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 #ifndef _ASM_POWERPC_ISERIES_LPAR_MAP_H
19 #define _ASM_POWERPC_ISERIES_LPAR_MAP_H
23 #include <asm/types.h>
26 * The iSeries hypervisor will set up mapping for one or more
27 * ESID/VSID pairs (in SLB/segment registers) and will set up
28 * mappings of one or more ranges of pages to VAs.
29 * We will have the hypervisor set up the ESID->VSID mapping
30 * for the four kernel segments (C-F). With shared processors,
31 * the hypervisor will clear all segment registers and reload
32 * these four whenever the processor is switched from one
33 * partition to another.
36 /* The Vsid and Esid identified below will be used by the hypervisor
37 * to set up a memory mapping for part of the load area before giving
38 * control to the Linux kernel. The load area is 64 MB, but this must
39 * not attempt to map the whole load area. The Hashed Page Table may
40 * need to be located within the load area (if the total partition size
41 * is 64 MB), but cannot be mapped. Typically, this should specify
42 * to map half (32 MB) of the load area.
44 * The hypervisor will set up page table entries for the number of
47 * In 32-bit mode, the hypervisor will load all four of the
48 * segment registers (identified by the low-order four bits of the
49 * Esid field. In 64-bit mode, the hypervisor will load one SLB
50 * entry to map the Esid to the Vsid.
53 #define HvEsidsToMap 2
54 #define HvRangesToMap 1
56 /* Hypervisor initially maps 32MB of the load area */
57 #define HvPagesToMap 8192
60 u64 xNumberEsids; // Number of ESID/VSID pairs
61 u64 xNumberRanges; // Number of VA ranges to map
62 u64 xSegmentTableOffs; // Page number within load area of seg table
65 u64 xKernelEsid; // Esid used to map kernel load
66 u64 xKernelVsid; // Vsid used to map kernel load
67 } xEsids[HvEsidsToMap];
69 u64 xPages; // Number of pages to be mapped
70 u64 xOffset; // Offset from start of load area
71 u64 xVPN; // Virtual Page Number
72 } xRanges[HvRangesToMap];
75 extern const struct LparMap xLparMap;
77 #endif /* __ASSEMBLY__ */
79 /* the fixed address where the LparMap exists */
80 #define LPARMAP_PHYS 0x7000
82 #endif /* _ASM_POWERPC_ISERIES_LPAR_MAP_H */