footbridge_intr.h revision 1.6
1 /* $NetBSD: footbridge_intr.h,v 1.6 2005/12/24 20:06:52 perry 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/armreg.h> 42 43 /* Define the various Interrupt Priority Levels */ 44 45 /* Hardware Interrupt Priority Levels are not mutually exclusive. */ 46 47 #define IPL_NONE 0 /* nothing */ 48 #define IPL_SOFT 1 /* generic soft interrupts */ 49 #define IPL_SOFTCLOCK 2 /* clock software interrupts */ 50 #define IPL_SOFTNET 3 /* network software interrupts */ 51 #define IPL_BIO 4 /* block I/O */ 52 #define IPL_NET 5 /* network */ 53 #define IPL_SOFTSERIAL 6 /* serial software interrupts */ 54 #define IPL_TTY 7 /* terminal */ 55 #define IPL_VM 8 /* memory allocation */ 56 #define IPL_AUDIO 9 /* audio */ 57 #define IPL_CLOCK 10 /* clock */ 58 #define IPL_STATCLOCK 11 /* statclock */ 59 #define IPL_HIGH 12 /* everything */ 60 #define IPL_SERIAL 13 /* serial */ 61 62 #define NIPL 14 63 64 #define IST_UNUSABLE -1 /* interrupt cannot be used */ 65 #define IST_NONE 0 /* none (dummy) */ 66 #define IST_PULSE 1 /* pulsed */ 67 #define IST_EDGE 2 /* edge-triggered */ 68 #define IST_LEVEL 3 /* level-triggered */ 69 70 #define __NEWINTR /* enables new hooks in cpu_fork()/cpu_switch() */ 71 72 #define ARM_IRQ_HANDLER _C_LABEL(footbridge_intr_dispatch) 73 74 #ifndef _LOCORE 75 #include <arm/cpufunc.h> 76 77 #include <arm/footbridge/dc21285mem.h> 78 #include <arm/footbridge/dc21285reg.h> 79 80 #define INT_SWMASK \ 81 ((1U << IRQ_SOFTINT) | (1U << IRQ_RESERVED0) | \ 82 (1U << IRQ_RESERVED1) | (1U << IRQ_RESERVED2)) 83 #define ICU_INT_HWMASK (0xffffffff & ~(INT_SWMASK | (1U << IRQ_RESERVED3))) 84 85 /* only call this with interrupts off */ 86 static inline void __attribute__((__unused__)) 87 footbridge_set_intrmask(void) 88 { 89 extern volatile uint32_t intr_enabled; 90 /* fetch once so we write the same number to both registers */ 91 uint32_t tmp = intr_enabled & ICU_INT_HWMASK; 92 93 ((volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_SET>>2] = tmp; 94 ((volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_CLEAR>>2] = ~tmp; 95 } 96 97 static inline void __attribute__((__unused__)) 98 footbridge_splx(int newspl) 99 { 100 extern volatile uint32_t intr_enabled; 101 extern volatile int current_spl_level; 102 extern volatile int footbridge_ipending; 103 extern void footbridge_do_pending(void); 104 int oldirqstate, hwpend; 105 106 current_spl_level = newspl; 107 108 hwpend = (footbridge_ipending & ICU_INT_HWMASK) & ~newspl; 109 if (hwpend != 0) { 110 oldirqstate = disable_interrupts(I32_bit); 111 intr_enabled |= hwpend; 112 footbridge_set_intrmask(); 113 restore_interrupts(oldirqstate); 114 } 115 116 if ((footbridge_ipending & INT_SWMASK) & ~newspl) 117 footbridge_do_pending(); 118 } 119 120 static inline int __attribute__((__unused__)) 121 footbridge_splraise(int ipl) 122 { 123 extern volatile int current_spl_level; 124 extern int footbridge_imask[]; 125 int old; 126 127 old = current_spl_level; 128 current_spl_level |= footbridge_imask[ipl]; 129 130 return (old); 131 } 132 133 static inline int __attribute__((__unused__)) 134 footbridge_spllower(int ipl) 135 { 136 extern volatile int current_spl_level; 137 extern int footbridge_imask[]; 138 int old = current_spl_level; 139 140 footbridge_splx(footbridge_imask[ipl]); 141 return(old); 142 } 143 144 /* should only be defined in footbridge_intr.c */ 145 #if !defined(ARM_SPL_NOINLINE) 146 147 #define splx(newspl) footbridge_splx(newspl) 148 #define _spllower(ipl) footbridge_spllower(ipl) 149 #define _splraise(ipl) footbridge_splraise(ipl) 150 void _setsoftintr(int); 151 152 #else 153 154 int _splraise(int); 155 int _spllower(int); 156 void splx(int); 157 void _setsoftintr(int); 158 159 #endif /* ! ARM_SPL_NOINLINE */ 160 161 #include <sys/device.h> 162 #include <sys/queue.h> 163 #include <machine/irqhandler.h> 164 165 #define splsoft() _splraise(IPL_SOFT) 166 #define splsoftclock() _splraise(IPL_SOFTCLOCK) 167 #define splsoftnet() _splraise(IPL_SOFTNET) 168 #define splbio() _splraise(IPL_BIO) 169 #define splnet() _splraise(IPL_NET) 170 #define splsoftserial() _splraise(IPL_SOFTSERIAL) 171 #define spltty() _splraise(IPL_TTY) 172 #define spllpt() spltty() 173 #define splvm() _splraise(IPL_VM) 174 #define splaudio() _splraise(IPL_AUDIO) 175 #define splclock() _splraise(IPL_CLOCK) 176 #define splstatclock() _splraise(IPL_STATCLOCK) 177 #define splhigh() _splraise(IPL_HIGH) 178 #define splserial() _splraise(IPL_SERIAL) 179 180 #define spl0() (void)_spllower(IPL_NONE) 181 #define spllowersoftclock() (void)_spllower(IPL_SOFTCLOCK) 182 183 #define splsched() splhigh() 184 #define spllock() splhigh() 185 186 /* Use generic software interrupt support. */ 187 #include <arm/softintr.h> 188 189 /* footbridge has 32 interrupt lines */ 190 #define NIRQ 32 191 192 struct intrhand { 193 TAILQ_ENTRY(intrhand) ih_list; /* link on intrq list */ 194 int (*ih_func)(void *); /* handler */ 195 void *ih_arg; /* arg for handler */ 196 int ih_ipl; /* IPL_* */ 197 int ih_irq; /* IRQ number */ 198 }; 199 200 #define IRQNAMESIZE sizeof("footbridge irq 31") 201 202 struct intrq { 203 TAILQ_HEAD(, intrhand) iq_list; /* handler list */ 204 struct evcnt iq_ev; /* event counter */ 205 int iq_mask; /* IRQs to mask while handling */ 206 int iq_levels; /* IPL_*'s this IRQ has */ 207 int iq_ist; /* share type */ 208 char iq_name[IRQNAMESIZE]; /* interrupt name */ 209 }; 210 211 #endif /* _LOCORE */ 212 213 #endif /* _FOOTBRIDGE_INTR_H */ 214
Indexes created Wed Oct 01 15:09:59 GMT 2025