a3b98398cb
- The MD functions critical_enter/exit are renamed to start with a cpu_ prefix. - MI wrapper functions critical_enter/exit maintain a per-thread nesting count and a per-thread critical section saved state set when entering a critical section while at nesting level 0 and restored when exiting to nesting level 0. This moves the saved state out of spin mutexes so that interlocking spin mutexes works properly. - Most low-level MD code that used critical_enter/exit now use cpu_critical_enter/exit. MI code such as device drivers and spin mutexes use the MI wrappers. Note that since the MI wrappers store the state in the current thread, they do not have any return values or arguments. - mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is assigned to curthread->td_savecrit during fork_exit(). Tested on: i386, alpha
79 lines
3.0 KiB
C
79 lines
3.0 KiB
C
/* $FreeBSD$ */
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/*
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* This is part of the Driver for Video Capture Cards (Frame grabbers)
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* and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
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* chipset.
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* Copyright Roger Hardiman and Amancio Hasty.
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*
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* bktr_os : This has all the Operating System dependant code.
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*
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*/
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/*
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* 1. Redistributions of source code must retain the
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* Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Amancio Hasty and
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* Roger Hardiman
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/******************************/
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/* *** Memory Allocation *** */
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/******************************/
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#if (defined(__FreeBSD__) || defined(__bsdi__))
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vm_offset_t get_bktr_mem( int unit, unsigned size );
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#endif
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#if (defined(__NetBSD__) || defined(__OpenBSD__))
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vm_offset_t get_bktr_mem(bktr_ptr_t, bus_dmamap_t *, unsigned size);
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void free_bktr_mem(bktr_ptr_t, bus_dmamap_t, vm_offset_t);
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#endif
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/************************************/
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/* *** Interrupt Enable/Disable *** */
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/************************************/
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#if defined(__FreeBSD__)
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#if (__FreeBSD_version >=500000)
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#define DECLARE_INTR_MASK(s) /* no need to declare 's' */
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#define DISABLE_INTR(s) critical_enter()
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#define ENABLE_INTR(s) critical_exit()
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#else
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#define DECLARE_INTR_MASK(s) intrmask_t s
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#define DISABLE_INTR(s) s=spltty()
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#define ENABLE_INTR(s) splx(s)
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#endif
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#else
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#define DECLARE_INTR_MASK(s) /* no need to declare 's' */
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#define DISABLE_INTR(s) disable_intr()
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#define ENABLE_INTR(s) enable_intr()
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#endif
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