1 /* $NetBSD: footbridge_intr.h,v 1.14 2009/02/13 08:37:52 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 _FOOTBRIDGE_INTR_H_ 39 #define _FOOTBRIDGE_INTR_H_ 40 41 #include <arm/cpu.h> 42 #include <arm/armreg.h> 43 44 #define IPL_NONE 0 /* nothing */ 45 #define IPL_SOFTCLOCK 1 /* clock soft interrupts */ 46 #define IPL_SOFTBIO 2 /* block i/o */ 47 #define IPL_SOFTNET 3 /* network software interrupts */ 48 #define IPL_SOFTSERIAL 4 /* serial software interrupts */ 49 #define IPL_VM 5 /* memory allocation */ 50 #define IPL_SCHED 6 /* clock */ 51 #define IPL_HIGH 7 /* everything */ 52 53 #define NIPL 8 54 55 #define IST_UNUSABLE -1 /* interrupt cannot be used */ 56 #define IST_NONE 0 /* none (dummy) */ 57 #define IST_PULSE 1 /* pulsed */ 58 #define IST_EDGE 2 /* edge-triggered */ 59 #define IST_LEVEL 3 /* level-triggered */ 60 61 #define __NEWINTR /* enables new hooks in cpu_fork()/cpu_switch() */ 62 63 #define ARM_IRQ_HANDLER _C_LABEL(footbridge_intr_dispatch) 64 65 #ifndef _LOCORE 66 #include <arm/cpufunc.h> 67 68 #include <arm/footbridge/dc21285mem.h> 69 #include <arm/footbridge/dc21285reg.h> 70 71 #define INT_SWMASK \ 72 ((1U << IRQ_SOFTINT) | (1U << IRQ_RESERVED0) | \ 73 (1U << IRQ_RESERVED1) | (1U << IRQ_RESERVED2)) 74 #define ICU_INT_HWMASK (0xffffffff & ~(INT_SWMASK | (1U << IRQ_RESERVED3))) 75 76 /* only call this with interrupts off */ 77 static inline void __attribute__((__unused__)) 78 footbridge_set_intrmask(void) 79 { 80 extern volatile uint32_t intr_enabled; 81 volatile uint32_t * const dc21285_armcsr_vbase = 82 (volatile uint32_t *)(DC21285_ARMCSR_VBASE); 83 84 /* fetch once so we write the same number to both registers */ 85 uint32_t tmp = intr_enabled & ICU_INT_HWMASK; 86 87 dc21285_armcsr_vbase[IRQ_ENABLE_SET>>2] = tmp; 88 dc21285_armcsr_vbase[IRQ_ENABLE_CLEAR>>2] = ~tmp; 89 } 90 91 static inline void __attribute__((__unused__)) 92 footbridge_splx(int ipl) 93 { 94 extern int footbridge_imask[]; 95 extern volatile uint32_t intr_enabled; 96 extern volatile int footbridge_ipending; 97 int oldirqstate, hwpend; 98 99 /* Don't let the compiler re-order this code with preceding code */ 100 __insn_barrier(); 101 102 set_curcpl(ipl); 103 104 hwpend = footbridge_ipending & ICU_INT_HWMASK & ~footbridge_imask[ipl]; 105 if (hwpend != 0) { 106 oldirqstate = disable_interrupts(I32_bit); 107 intr_enabled |= hwpend; 108 footbridge_set_intrmask(); 109 restore_interrupts(oldirqstate); 110 } 111 112 #ifdef __HAVE_FAST_SOFTINTS 113 cpu_dosoftints(); 114 #endif 115 } 116 117 static inline int __attribute__((__unused__)) 118 footbridge_splraise(int ipl) 119 { 120 int old; 121 122 old = curcpl(); 123 set_curcpl(ipl); 124 125 /* Don't let the compiler re-order this code with subsequent code */ 126 __insn_barrier(); 127 128 return (old); 129 } 130 131 static inline int __attribute__((__unused__)) 132 footbridge_spllower(int ipl) 133 { 134 int old = curcpl(); 135 136 footbridge_splx(ipl); 137 return(old); 138 } 139 140 /* should only be defined in footbridge_intr.c */ 141 #if !defined(ARM_SPL_NOINLINE) 142 143 #define splx(newspl) footbridge_splx(newspl) 144 #define _spllower(ipl) footbridge_spllower(ipl) 145 #define _splraise(ipl) footbridge_splraise(ipl) 146 void _setsoftintr(int); 147 148 #else 149 150 int _splraise(int); 151 int _spllower(int); 152 void splx(int); 153 void _setsoftintr(int); 154 155 #endif /* ! ARM_SPL_NOINLINE */ 156 157 #include <sys/evcnt.h> 158 #include <sys/queue.h> 159 #include <machine/irqhandler.h> 160 161 #define splsoft() _splraise(IPL_SOFT) 162 163 #define spl0() (void)_spllower(IPL_NONE) 164 #define spllowersoftclock() (void)_spllower(IPL_SOFTCLOCK) 165 166 typedef uint8_t ipl_t; 167 typedef struct { 168 ipl_t _ipl; 169 } ipl_cookie_t; 170 171 static inline ipl_cookie_t 172 makeiplcookie(ipl_t ipl) 173 { 174 175 return (ipl_cookie_t){._ipl = ipl}; 176 } 177 178 static inline int 179 splraiseipl(ipl_cookie_t icookie) 180 { 181 182 return _splraise(icookie._ipl); 183 } 184 185 #include <sys/spl.h> 186 187 /* footbridge has 32 interrupt lines */ 188 #define NIRQ 32 189 190 struct intrhand { 191 TAILQ_ENTRY(intrhand) ih_list; /* link on intrq list */ 192 int (*ih_func)(void *); /* handler */ 193 void *ih_arg; /* arg for handler */ 194 int ih_ipl; /* IPL_* */ 195 int ih_irq; /* IRQ number */ 196 }; 197 198 #define IRQNAMESIZE sizeof("footbridge irq 31") 199 200 struct intrq { 201 TAILQ_HEAD(, intrhand) iq_list; /* handler list */ 202 struct evcnt iq_ev; /* event counter */ 203 int iq_mask; /* IRQs to mask while handling */ 204 int iq_levels; /* IPL_*'s this IRQ has */ 205 int iq_ist; /* share type */ 206 int iq_ipl; /* max ipl */ 207 char iq_name[IRQNAMESIZE]; /* interrupt name */ 208 }; 209 210 #endif /* _LOCORE */ 211 212 #endif /* _FOOTBRIDGE_INTR_H */ 213