00001 /* 00002 Copyright (C) 2011 Computer Sciences Department, 00003 University of Wisconsin -- Madison 00004 00005 ---------------------------------------------------------------------- 00006 00007 This file is part of Mnemosyne: Lightweight Persistent Memory, 00008 originally developed at the University of Wisconsin -- Madison. 00009 00010 Mnemosyne was originally developed primarily by Haris Volos 00011 with contributions from Andres Jaan Tack. 00012 00013 ---------------------------------------------------------------------- 00014 00015 Mnemosyne is free software; you can redistribute it and/or 00016 modify it under the terms of the GNU General Public License 00017 as published by the Free Software Foundation, version 2 00018 of the License. 00019 00020 Mnemosyne is distributed in the hope that it will be useful, 00021 but WITHOUT ANY WARRANTY; without even the implied warranty of 00022 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00023 GNU General Public License for more details. 00024 00025 You should have received a copy of the GNU General Public License 00026 along with this program; if not, write to the Free Software 00027 Foundation, Inc., 51 Franklin Street, Fifth Floor, 00028 Boston, MA 02110-1301, USA. 00029 00030 ### END HEADER ### 00031 */ 00032 00033 #ifndef _PERSISTENT_REGION_LAYOUT 00034 #define _PERSISTENT_REGION_LAYOUT 00035 00036 00037 /* 00038 * We reserve a large hole in the 47-bit virtual space for mapping 00039 * persistent memory segments. 00040 * FIXME: Even if we ensure persistent segments fall into the reserved space, 00041 * the kernel has to be aware about this reservation to make sure that no other 00042 * memory is allocated there. Indead, when mmap is passed 0 as starting 00043 * address, it searches for an empty region starting from the end of the last 00044 * allocated region. So it could be very easily map a non-persistent region 00045 * into the reserved space. 00046 * 00047 * Each region must be page aligned. We use PAGE_ALIGN to accomblish this. 00048 * 00049 * The end address of the region is not included in the region. More formally, 00050 * given a start and end address, the region is defined as [start, end) . 00051 * 00052 */ 00053 00054 #define PSEGMENT_RESERVED_REGION_START 0x0000100000000000 00055 #define PSEGMENT_RESERVED_REGION_SIZE 0x0000010000000000 /* 1 TB */ 00056 #define PSEGMENT_RESERVED_REGION_END (PSEGMENT_RESERVED_REGION_START + \ 00057 PSEGMENT_RESERVED_REGION_SIZE) 00058 /* Segment table */ 00059 #define SEGMENT_TABLE_START PSEGMENT_RESERVED_REGION_START 00060 #define SEGMENT_TABLE_NUM_ENTRIES 1024 00061 #define SEGMENT_TABLE_SIZE (sizeof(m_segtbl_entry_t) * \ 00062 SEGMENT_TABLE_NUM_ENTRIES) 00063 00064 #define SEGMENT_TABLE_HOLE 0x10000 00065 #define SEGMENT_TABLE_END PAGE_ALIGN( \ 00066 SEGMENT_TABLE_START + \ 00067 SEGMENT_TABLE_HOLE + \ 00068 SEGMENT_TABLE_SIZE) 00069 /* Log pool */ 00070 #define LOG_POOL_START SEGMENT_TABLE_END 00071 #define LOG_POOL_SIZE (32*16*1024*1024+32*32*64) 00072 #define LOG_POOL_HOLE 0x10000 00073 #define LOG_POOL_END PAGE_ALIGN( \ 00074 LOG_POOL_START + \ 00075 LOG_POOL_HOLE + \ 00076 LOG_POOL_SIZE) 00077 /* pmap segments start addr */ 00078 #define SEGMENT_MAP_START LOG_POOL_END 00079 00080 00081 00082 #endif /* _PERSISTENT_REGION_LAYOUT */
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