/*
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* Copyright (C) 2005 Philippe Gerum <rpm@xenomai.org>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#ifndef _COBALT_UAPI_ASM_GENERIC_FEATURES_H
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#define _COBALT_UAPI_ASM_GENERIC_FEATURES_H
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#include <linux/types.h>
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#define XNFEAT_STRING_LEN 64
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struct cobalt_featinfo {
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/** Real-time clock frequency */
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__u64 clock_freq;
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/** Offset of nkvdso in the sem heap. */
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__u32 vdso_offset;
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/** ABI revision level. */
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__u32 feat_abirev;
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/** Available feature set. */
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__u32 feat_all;
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/** Mandatory features (when requested). */
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__u32 feat_man;
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/** Requested feature set. */
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__u32 feat_req;
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/** Missing features. */
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__u32 feat_mis;
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char feat_all_s[XNFEAT_STRING_LEN];
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char feat_man_s[XNFEAT_STRING_LEN];
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char feat_req_s[XNFEAT_STRING_LEN];
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char feat_mis_s[XNFEAT_STRING_LEN];
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/* Architecture-specific features. */
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struct cobalt_featinfo_archdep feat_arch;
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};
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#define __xn_feat_smp 0x80000000
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#define __xn_feat_nosmp 0x40000000
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#define __xn_feat_fastsynch 0x20000000
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#define __xn_feat_nofastsynch 0x10000000
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#define __xn_feat_control 0x08000000
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#define __xn_feat_prioceiling 0x04000000
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#ifdef CONFIG_SMP
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#define __xn_feat_smp_mask __xn_feat_smp
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#else
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#define __xn_feat_smp_mask __xn_feat_nosmp
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#endif
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/*
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* Revisit: all archs currently support fast locking, and there is no
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* reason for any future port not to provide this. This will be
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* written in stone at the next ABI update, when fastsynch support is
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* dropped from the optional feature set.
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*/
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#define __xn_feat_fastsynch_mask __xn_feat_fastsynch
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/* List of generic features kernel or userland may support */
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#define __xn_feat_generic_mask \
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(__xn_feat_smp_mask | \
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__xn_feat_fastsynch_mask | \
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__xn_feat_prioceiling)
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/*
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* List of features both sides have to agree on: If userland supports
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* it, the kernel has to provide it, too. This means backward
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* compatibility between older userland and newer kernel may be
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* supported for those features, but forward compatibility between
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* newer userland and older kernel cannot.
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*/
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#define __xn_feat_generic_man_mask \
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(__xn_feat_fastsynch | \
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__xn_feat_nofastsynch | \
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__xn_feat_nosmp | \
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__xn_feat_prioceiling)
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static inline
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const char *get_generic_feature_label(unsigned int feature)
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{
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switch (feature) {
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case __xn_feat_smp:
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return "smp";
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case __xn_feat_nosmp:
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return "nosmp";
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case __xn_feat_fastsynch:
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return "fastsynch";
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case __xn_feat_nofastsynch:
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return "nofastsynch";
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case __xn_feat_control:
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return "control";
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case __xn_feat_prioceiling:
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return "prioceiling";
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default:
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return 0;
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}
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}
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static inline int check_abi_revision(unsigned long abirev)
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{
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return abirev == XENOMAI_ABI_REV;
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}
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#endif /* !_COBALT_UAPI_ASM_GENERIC_FEATURES_H */
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