ad27e1d5e48ca41245120c331cc88b50464813cevboxsync * Copyright 2009-2010 Oracle Corporation
5c65eaa08f2ec993a19c9bef6e5463918e40e0ebvboxsync * All rights reserved.
26456d1900aba0e903e6e1beec552396618322e2vboxsync * Use is subject to license terms.
26456d1900aba0e903e6e1beec552396618322e2vboxsync * Atomic operations used in the DRM which may or may not be provided by the OS.
26456d1900aba0e903e6e1beec552396618322e2vboxsync * \author Eric Anholt <anholt@FreeBSD.org>
26456d1900aba0e903e6e1beec552396618322e2vboxsync * Copyright 2004 Eric Anholt
26456d1900aba0e903e6e1beec552396618322e2vboxsync * All Rights Reserved.
26456d1900aba0e903e6e1beec552396618322e2vboxsync * Permission is hereby granted, free of charge, to any person obtaining a
26456d1900aba0e903e6e1beec552396618322e2vboxsync * copy of this software and associated documentation files (the "Software"),
26456d1900aba0e903e6e1beec552396618322e2vboxsync * to deal in the Software without restriction, including without limitation
26456d1900aba0e903e6e1beec552396618322e2vboxsync * the rights to use, copy, modify, merge, publish, distribute, sublicense,
26456d1900aba0e903e6e1beec552396618322e2vboxsync * and/or sell copies of the Software, and to permit persons to whom the
26456d1900aba0e903e6e1beec552396618322e2vboxsync * Software is furnished to do so, subject to the following conditions:
26456d1900aba0e903e6e1beec552396618322e2vboxsync * The above copyright notice and this permission notice (including the next
26456d1900aba0e903e6e1beec552396618322e2vboxsync * paragraph) shall be included in all copies or substantial portions of the
26456d1900aba0e903e6e1beec552396618322e2vboxsync * Software.
26456d1900aba0e903e6e1beec552396618322e2vboxsync * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26456d1900aba0e903e6e1beec552396618322e2vboxsync * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26456d1900aba0e903e6e1beec552396618322e2vboxsync * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26456d1900aba0e903e6e1beec552396618322e2vboxsync * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
26456d1900aba0e903e6e1beec552396618322e2vboxsync * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
26456d1900aba0e903e6e1beec552396618322e2vboxsync * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26456d1900aba0e903e6e1beec552396618322e2vboxsync * OTHER DEALINGS IN THE SOFTWARE.
26456d1900aba0e903e6e1beec552396618322e2vboxsync/* Many of these implementations are rather fake, but good enough. */
26456d1900aba0e903e6e1beec552396618322e2vboxsyncextern "C" {
26456d1900aba0e903e6e1beec552396618322e2vboxsync#define inline
26456d1900aba0e903e6e1beec552396618322e2vboxsync#define atomic_set_int(p, bits) atomic_or_uint(p, bits)
26456d1900aba0e903e6e1beec552396618322e2vboxsync#define atomic_clear_int(p, bits) atomic_and_uint(p, ~(bits))
26456d1900aba0e903e6e1beec552396618322e2vboxsync atomic_set_int(((volatile uint_t *)(void *)p) + (b >> 5), \
26456d1900aba0e903e6e1beec552396618322e2vboxsync atomic_clear_int(((volatile uint_t *)(void *)p) + (b >> 5), \
26456d1900aba0e903e6e1beec552396618322e2vboxsync (((volatile uint_t *)(void *)p)[b >> 5] & (1 << (b & 0x1f)))
26456d1900aba0e903e6e1beec552396618322e2vboxsync * Note: this routine doesn't return old value. It return
26456d1900aba0e903e6e1beec552396618322e2vboxsync * 0 when succeeds, or -1 when fails.
26456d1900aba0e903e6e1beec552396618322e2vboxsync atomic_set_long_excl(((ulong_t *)(void *)p) + (b >> 6), (b & 0x3f))
26456d1900aba0e903e6e1beec552396618322e2vboxsync atomic_set_long_excl(((ulong_t *)(void *)p) + (b >> 5), (b & 0x1f))
26456d1900aba0e903e6e1beec552396618322e2vboxsync#endif /* _SYS_DRM_ATOMIC_H_ */