1 /* $NetBSD: pic_splfuncs.c,v 1.2 2011/05/28 20:56:37 jakllsch Exp $ */ 2 /*- 3 * Copyright (c) 2008 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: pic_splfuncs.c,v 1.2 2011/05/28 20:56:37 jakllsch Exp $"); 32 33 #define _INTR_PRIVATE 34 #include <sys/param.h> 35 #include <sys/evcnt.h> 36 #include <sys/atomic.h> 37 #include <sys/malloc.h> 38 #include <sys/mallocvar.h> 39 #include <sys/atomic.h> 40 41 #include <arm/armreg.h> 42 #include <arm/cpu.h> 43 #include <arm/cpufunc.h> 44 45 #include <arm/pic/picvar.h> 46 47 48 int 49 _splraise(int newipl) 50 { 51 struct cpu_info * const ci = curcpu(); 52 const int oldipl = ci->ci_cpl; 53 KASSERT(newipl < NIPL); 54 if (newipl > ci->ci_cpl) 55 ci->ci_cpl = newipl; 56 return oldipl; 57 } 58 int 59 _spllower(int newipl) 60 { 61 struct cpu_info * const ci = curcpu(); 62 const int oldipl = ci->ci_cpl; 63 KASSERT(panicstr || newipl <= ci->ci_cpl); 64 if (newipl < ci->ci_cpl) { 65 register_t psw = disable_interrupts(I32_bit); 66 ci->ci_intr_depth++; 67 pic_do_pending_ints(psw, newipl, NULL); 68 ci->ci_intr_depth--; 69 restore_interrupts(psw); 70 } 71 return oldipl; 72 } 73 74 void 75 splx(int savedipl) 76 { 77 struct cpu_info * const ci = curcpu(); 78 KASSERT(savedipl < NIPL); 79 if (savedipl < ci->ci_cpl) { 80 register_t psw = disable_interrupts(I32_bit); 81 ci->ci_intr_depth++; 82 pic_do_pending_ints(psw, savedipl, NULL); 83 ci->ci_intr_depth--; 84 restore_interrupts(psw); 85 } 86 ci->ci_cpl = savedipl; 87 } 88