00001 /* 00002 * Copyright (C) 2001-2007 Philippe Gerum <rpm@xenomai.org>. 00003 * 00004 * Xenomai is free software; you can redistribute it and/or modify 00005 * it under the terms of the GNU General Public License as published 00006 * by the Free Software Foundation; either version 2 of the License, 00007 * or (at your option) any later version. 00008 * 00009 * Xenomai is distributed in the hope that it will be useful, but 00010 * WITHOUT ANY WARRANTY; without even the implied warranty of 00011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 * General Public License for more details. 00013 * 00014 * You should have received a copy of the GNU General Public License 00015 * along with Xenomai; if not, write to the Free Software 00016 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 00017 * 02111-1307, USA. 00018 * 00019 * Core pod definitions. The core pod supports all APIs. Core APIs, 00020 * namely POSIX, native and RTDM, only use a sub-range of the 00021 * available priority levels of the core pod, in order to have them 00022 * exhibit a 1:1 mapping with Linux's SCHED_FIFO ascending priority 00023 * scale [1..99]. Non-core APIs which exhibit inverted priority scales 00024 * (e.g. VxWorks, VRTX), should normalize the priority values 00025 * internally when calling the priority-sensitive services of the 00026 * nucleus, so that they fit in the available range provided by the 00027 * latter. 00028 */ 00029 00030 #ifndef _XENO_NUCLEUS_CORE_H 00031 #define _XENO_NUCLEUS_CORE_H 00032 00033 /* Visible priority range supported by the core pod. */ 00034 #define XNCORE_MIN_PRIO 0 00035 #define XNCORE_MAX_PRIO 257 00036 /* Idle priority of the root thread scheduled within the core pod. */ 00037 #define XNCORE_IDLE_PRIO -1 00038 00039 /* Total number of priority levels (including the hidden root one) */ 00040 #define XNCORE_NR_PRIO (XNCORE_MAX_PRIO - XNCORE_IDLE_PRIO + 1) 00041 00042 /* Priority sub-range used by core APIs. */ 00043 #define XNCORE_LOW_PRIO 0 00044 #define XNCORE_HIGH_PRIO 99 00045 00046 /* Priority of IRQ servers in user-space. */ 00047 #define XNCORE_IRQ_PRIO XNCORE_MAX_PRIO 00048 00049 #define XNCORE_PAGE_SIZE 512 /* A reasonable value for the xnheap page size */ 00050 #define XNCORE_PAGE_MASK (~(XNCORE_PAGE_SIZE-1)) 00051 #define XNCORE_PAGE_ALIGN(addr) (((addr)+XNCORE_PAGE_SIZE-1)&XNCORE_PAGE_MASK) 00052 00053 #endif /* !_XENO_NUCLEUS_CORE_H */
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