1 /* $NetBSD: i80321_intr.h,v 1.9 2006/11/08 23:45:41 scw Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2006 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Steve C. Woodford 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 _I80321_INTR_H_ 39 #define _I80321_INTR_H_ 40 41 #define ARM_IRQ_HANDLER _C_LABEL(i80321_intr_dispatch) 42 43 #ifndef _LOCORE 44 45 #include <arm/armreg.h> 46 #include <arm/cpufunc.h> 47 48 #include <arm/xscale/i80321reg.h> 49 50 void i80321_do_pending(void); 51 52 static inline void __attribute__((__unused__)) 53 i80321_set_intrmask(void) 54 { 55 extern volatile uint32_t intr_enabled; 56 57 __asm volatile("mcr p6, 0, %0, c0, c0, 0" 58 : 59 : "r" (intr_enabled & ICU_INT_HWMASK)); 60 } 61 62 #define INT_SWMASK \ 63 ((1U << ICU_INT_bit26) | (1U << ICU_INT_bit22) | \ 64 (1U << ICU_INT_bit5) | (1U << ICU_INT_bit4)) 65 66 #define INT_HPIMASK (1u << ICU_INT_HPI) 67 68 static inline void __attribute__((__unused__)) 69 i80321_splx(int new) 70 { 71 extern volatile uint32_t intr_enabled; 72 extern volatile int current_spl_level; 73 extern volatile int i80321_ipending; 74 extern void i80321_do_pending(void); 75 int oldirqstate, hwpend; 76 77 /* Don't let the compiler re-order this code with preceding code */ 78 __insn_barrier(); 79 80 current_spl_level = new; 81 82 hwpend = (i80321_ipending & ICU_INT_HWMASK) & ~new; 83 if (hwpend != 0) { 84 oldirqstate = disable_interrupts(I32_bit); 85 intr_enabled |= hwpend; 86 i80321_set_intrmask(); 87 #ifdef I80321_HPI_ENABLED 88 if (__predict_false(hwpend & INT_HPIMASK)) 89 oldirqstate &= ~I32_bit; 90 #endif 91 restore_interrupts(oldirqstate); 92 } 93 94 if ((i80321_ipending & INT_SWMASK) & ~new) 95 i80321_do_pending(); 96 } 97 98 static inline int __attribute__((__unused__)) 99 i80321_splraise(int ipl) 100 { 101 extern volatile int current_spl_level; 102 extern int i80321_imask[]; 103 int old; 104 105 old = current_spl_level; 106 current_spl_level |= i80321_imask[ipl]; 107 108 /* Don't let the compiler re-order this code with subsequent code */ 109 __insn_barrier(); 110 111 return (old); 112 } 113 114 static inline int __attribute__((__unused__)) 115 i80321_spllower(int ipl) 116 { 117 extern volatile int current_spl_level; 118 extern int i80321_imask[]; 119 int old = current_spl_level; 120 121 i80321_splx(i80321_imask[ipl]); 122 return(old); 123 } 124 125 #if !defined(EVBARM_SPL_NOINLINE) 126 127 #define splx(new) i80321_splx(new) 128 #define _spllower(ipl) i80321_spllower(ipl) 129 #define _splraise(ipl) i80321_splraise(ipl) 130 void _setsoftintr(int); 131 132 #else 133 134 int _splraise(int); 135 int _spllower(int); 136 void splx(int); 137 void _setsoftintr(int); 138 139 #endif /* ! EVBARM_SPL_NOINLINE */ 140 141 #endif /* _LOCORE */ 142 143 #endif /* _I80321_INTR_H_ */ 144