1 /* $NetBSD: ifpga_intr.h,v 1.9 2009/02/13 21:08:40 he Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #ifndef _IFPGA_INTR_H_ 39 #define _IFPGA_INTR_H_ 40 41 #define ARM_IRQ_HANDLER _C_LABEL(ifpga_intr_dispatch) 42 43 #ifndef _LOCORE 44 45 #include <arm/cpu.h> 46 #include <arm/armreg.h> 47 #include <arm/cpufunc.h> 48 49 #include <evbarm/ifpga/ifpgareg.h> 50 #include <evbarm/ifpga/ifpgavar.h> 51 52 static inline void __attribute__((__unused__)) 53 ifpga_set_intrmask(void) 54 { 55 extern volatile uint32_t intr_enabled; 56 extern struct ifpga_softc *ifpga_sc; 57 uint32_t mask = intr_enabled; 58 59 bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh, 60 IFPGA_INTR_ENABLECLR, ~mask); 61 bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh, 62 IFPGA_INTR_ENABLESET, mask); 63 } 64 65 static inline void __attribute__((__unused__)) 66 ifpga_splx(int new) 67 { 68 extern volatile uint32_t intr_enabled; 69 extern volatile int ifpga_ipending; 70 int oldirqstate, hwpend; 71 72 __insn_barrier(); 73 74 oldirqstate = disable_interrupts(I32_bit); 75 set_curcpl(new); 76 77 hwpend = (ifpga_ipending & IFPGA_INTR_HWMASK) & ~new; 78 if (hwpend != 0) { 79 intr_enabled |= hwpend; 80 ifpga_set_intrmask(); 81 } 82 83 restore_interrupts(oldirqstate); 84 85 #ifdef __HAVE_FAST_SOFTINTS 86 cpu_dosoftints(); 87 #endif 88 } 89 90 static inline int __attribute__((__unused__)) 91 ifpga_splraise(int ipl) 92 { 93 extern int ifpga_imask[]; 94 const int old = curcpl(); 95 set_curcpl(old | ifpga_imask[ipl]); 96 97 __insn_barrier(); 98 99 return (old); 100 } 101 102 static inline int __attribute__((__unused__)) 103 ifpga_spllower(int ipl) 104 { 105 extern int ifpga_imask[]; 106 const int old = curcpl(); 107 108 ifpga_splx(ifpga_imask[ipl]); 109 return(old); 110 } 111 112 #if !defined(EVBARM_SPL_NOINLINE) 113 114 #define splx(new) ifpga_splx(new) 115 #define _spllower(ipl) ifpga_spllower(ipl) 116 #define _splraise(ipl) ifpga_splraise(ipl) 117 118 #else 119 120 int _splraise(int); 121 int _spllower(int); 122 void splx(int); 123 124 #endif /* ! EVBARM_SPL_NOINLINE */ 125 126 #endif /* _LOCORE */ 127 128 #endif /* _IFPGA_INTR_H_ */ 129