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pic_splfuncs.c revision 1.1.2.3 
      1  1.1.2.2  rmind /*	$NetBSD: pic_splfuncs.c,v 1.1.2.3 2011/05/31 03:03:56 rmind Exp $	*/
      2  1.1.2.2  rmind /*-
      3  1.1.2.2  rmind  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      4  1.1.2.2  rmind  * All rights reserved.
      5  1.1.2.2  rmind  *
      6  1.1.2.2  rmind  * This code is derived from software contributed to The NetBSD Foundation
      7  1.1.2.2  rmind  * by Matt Thomas.
      8  1.1.2.2  rmind  *
      9  1.1.2.2  rmind  * Redistribution and use in source and binary forms, with or without
     10  1.1.2.2  rmind  * modification, are permitted provided that the following conditions
     11  1.1.2.2  rmind  * are met:
     12  1.1.2.2  rmind  * 1. Redistributions of source code must retain the above copyright
     13  1.1.2.2  rmind  *    notice, this list of conditions and the following disclaimer.
     14  1.1.2.2  rmind  * 2. Redistributions in binary form must reproduce the above copyright
     15  1.1.2.2  rmind  *    notice, this list of conditions and the following disclaimer in the
     16  1.1.2.2  rmind  *    documentation and/or other materials provided with the distribution.
     17  1.1.2.2  rmind  *
     18  1.1.2.2  rmind  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  1.1.2.2  rmind  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  1.1.2.2  rmind  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  1.1.2.2  rmind  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  1.1.2.2  rmind  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  1.1.2.2  rmind  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  1.1.2.2  rmind  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  1.1.2.2  rmind  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  1.1.2.2  rmind  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  1.1.2.2  rmind  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  1.1.2.2  rmind  * POSSIBILITY OF SUCH DAMAGE.
     29  1.1.2.2  rmind  */
     30  1.1.2.2  rmind #include <sys/cdefs.h>
     31  1.1.2.2  rmind __KERNEL_RCSID(0, "$NetBSD: pic_splfuncs.c,v 1.1.2.3 2011/05/31 03:03:56 rmind Exp $");
     32  1.1.2.2  rmind 
     33  1.1.2.2  rmind #define _INTR_PRIVATE
     34  1.1.2.2  rmind #include <sys/param.h>
     35  1.1.2.2  rmind #include <sys/evcnt.h>
     36  1.1.2.2  rmind #include <sys/atomic.h>
     37  1.1.2.2  rmind #include <sys/malloc.h>
     38  1.1.2.2  rmind #include <sys/mallocvar.h>
     39  1.1.2.2  rmind #include <sys/atomic.h>
     40  1.1.2.2  rmind 
     41  1.1.2.2  rmind #include <arm/armreg.h>
     42  1.1.2.2  rmind #include <arm/cpu.h>
     43  1.1.2.2  rmind #include <arm/cpufunc.h>
     44  1.1.2.2  rmind 
     45  1.1.2.2  rmind #include <arm/pic/picvar.h>
     46  1.1.2.2  rmind 
     47  1.1.2.2  rmind 
     48  1.1.2.2  rmind int
     49  1.1.2.2  rmind _splraise(int newipl)
     50  1.1.2.2  rmind {
     51  1.1.2.2  rmind 	struct cpu_info * const ci = curcpu();
     52  1.1.2.2  rmind 	const int oldipl = ci->ci_cpl;
     53  1.1.2.2  rmind 	KASSERT(newipl < NIPL);
     54  1.1.2.2  rmind 	if (newipl > ci->ci_cpl)
     55  1.1.2.2  rmind 		ci->ci_cpl = newipl;
     56  1.1.2.2  rmind 	return oldipl;
     57  1.1.2.2  rmind }
     58  1.1.2.2  rmind int
     59  1.1.2.2  rmind _spllower(int newipl)
     60  1.1.2.2  rmind {
     61  1.1.2.2  rmind 	struct cpu_info * const ci = curcpu();
     62  1.1.2.2  rmind 	const int oldipl = ci->ci_cpl;
     63  1.1.2.2  rmind 	KASSERT(panicstr || newipl <= ci->ci_cpl);
     64  1.1.2.2  rmind 	if (newipl < ci->ci_cpl) {
     65  1.1.2.2  rmind 		register_t psw = disable_interrupts(I32_bit);
     66  1.1.2.3  rmind 		ci->ci_intr_depth++;
     67  1.1.2.2  rmind 		pic_do_pending_ints(psw, newipl, NULL);
     68  1.1.2.3  rmind 		ci->ci_intr_depth--;
     69  1.1.2.2  rmind 		restore_interrupts(psw);
     70  1.1.2.2  rmind 	}
     71  1.1.2.2  rmind 	return oldipl;
     72  1.1.2.2  rmind }
     73  1.1.2.2  rmind 
     74  1.1.2.2  rmind void
     75  1.1.2.2  rmind splx(int savedipl)
     76  1.1.2.2  rmind {
     77  1.1.2.2  rmind 	struct cpu_info * const ci = curcpu();
     78  1.1.2.2  rmind 	KASSERT(savedipl < NIPL);
     79  1.1.2.2  rmind 	if (savedipl < ci->ci_cpl) {
     80  1.1.2.2  rmind 		register_t psw = disable_interrupts(I32_bit);
     81  1.1.2.3  rmind 		ci->ci_intr_depth++;
     82  1.1.2.2  rmind 		pic_do_pending_ints(psw, savedipl, NULL);
     83  1.1.2.3  rmind 		ci->ci_intr_depth--;
     84  1.1.2.2  rmind 		restore_interrupts(psw);
     85  1.1.2.2  rmind 	}
     86  1.1.2.2  rmind 	ci->ci_cpl = savedipl;
     87  1.1.2.2  rmind }
     88