footbridge_intr.h revision 1.8
1 /* $NetBSD: footbridge_intr.h,v 1.8 2006/04/16 23:31:54 chris 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_LPT IPL_TTY 56 #define IPL_VM 8 /* memory allocation */ 57 #define IPL_AUDIO 9 /* audio */ 58 #define IPL_CLOCK 10 /* clock */ 59 #define IPL_STATCLOCK 11 /* statclock */ 60 #define IPL_HIGH 12 /* everything */ 61 #define IPL_SCHED IPL_HIGH 62 #define IPL_LOCK IPL_HIGH 63 #define IPL_SERIAL 13 /* serial */ 64 65 #define NIPL 14 66 67 #define IST_UNUSABLE -1 /* interrupt cannot be used */ 68 #define IST_NONE 0 /* none (dummy) */ 69 #define IST_PULSE 1 /* pulsed */ 70 #define IST_EDGE 2 /* edge-triggered */ 71 #define IST_LEVEL 3 /* level-triggered */ 72 73 #define __NEWINTR /* enables new hooks in cpu_fork()/cpu_switch() */ 74 75 #define ARM_IRQ_HANDLER _C_LABEL(footbridge_intr_dispatch) 76 77 #ifndef _LOCORE 78 #include <arm/cpufunc.h> 79 80 #include <arm/footbridge/dc21285mem.h> 81 #include <arm/footbridge/dc21285reg.h> 82 83 #define INT_SWMASK \ 84 ((1U << IRQ_SOFTINT) | (1U << IRQ_RESERVED0) | \ 85 (1U << IRQ_RESERVED1) | (1U << IRQ_RESERVED2)) 86 #define ICU_INT_HWMASK (0xffffffff & ~(INT_SWMASK | (1U << IRQ_RESERVED3))) 87 88 /* only call this with interrupts off */ 89 static inline void __attribute__((__unused__)) 90 footbridge_set_intrmask(void) 91 { 92 extern volatile uint32_t intr_enabled; 93 /* fetch once so we write the same number to both registers */ 94 uint32_t tmp = intr_enabled & ICU_INT_HWMASK; 95 96 ((volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_SET>>2] = tmp; 97 ((volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_CLEAR>>2] = ~tmp; 98 } 99 100 static inline void __attribute__((__unused__)) 101 footbridge_splx(int newspl) 102 { 103 extern volatile uint32_t intr_enabled; 104 extern volatile int current_spl_level; 105 extern volatile int footbridge_ipending; 106 extern void footbridge_do_pending(void); 107 int oldirqstate, hwpend; 108 109 /* Don't let the compiler re-order this code with preceding code */ 110 __insn_barrier(); 111 112 current_spl_level = newspl; 113 114 hwpend = (footbridge_ipending & ICU_INT_HWMASK) & ~newspl; 115 if (hwpend != 0) { 116 oldirqstate = disable_interrupts(I32_bit); 117 intr_enabled |= hwpend; 118 footbridge_set_intrmask(); 119 restore_interrupts(oldirqstate); 120 } 121 122 if ((footbridge_ipending & INT_SWMASK) & ~newspl) 123 footbridge_do_pending(); 124 } 125 126 static inline int __attribute__((__unused__)) 127 footbridge_splraise(int ipl) 128 { 129 extern volatile int current_spl_level; 130 extern int footbridge_imask[]; 131 int old; 132 133 old = current_spl_level; 134 current_spl_level |= footbridge_imask[ipl]; 135 136 /* Don't let the compiler re-order this code with subsequent code */ 137 __insn_barrier(); 138 139 return (old); 140 } 141 142 static inline int __attribute__((__unused__)) 143 footbridge_spllower(int ipl) 144 { 145 extern volatile int current_spl_level; 146 extern int footbridge_imask[]; 147 int old = current_spl_level; 148 149 footbridge_splx(footbridge_imask[ipl]); 150 return(old); 151 } 152 153 /* should only be defined in footbridge_intr.c */ 154 #if !defined(ARM_SPL_NOINLINE) 155 156 #define splx(newspl) footbridge_splx(newspl) 157 #define _spllower(ipl) footbridge_spllower(ipl) 158 #define _splraise(ipl) footbridge_splraise(ipl) 159 void _setsoftintr(int); 160 161 #else 162 163 int _splraise(int); 164 int _spllower(int); 165 void splx(int); 166 void _setsoftintr(int); 167 168 #endif /* ! ARM_SPL_NOINLINE */ 169 170 #include <sys/device.h> 171 #include <sys/queue.h> 172 #include <machine/irqhandler.h> 173 174 #define splsoft() _splraise(IPL_SOFT) 175 #define splraiseipl(x) _splraise(x) 176 177 #define spl0() (void)_spllower(IPL_NONE) 178 #define spllowersoftclock() (void)_spllower(IPL_SOFTCLOCK) 179 180 #include <sys/spl.h> 181 182 /* Use generic software interrupt support. */ 183 #include <arm/softintr.h> 184 185 /* footbridge has 32 interrupt lines */ 186 #define NIRQ 32 187 188 struct intrhand { 189 TAILQ_ENTRY(intrhand) ih_list; /* link on intrq list */ 190 int (*ih_func)(void *); /* handler */ 191 void *ih_arg; /* arg for handler */ 192 int ih_ipl; /* IPL_* */ 193 int ih_irq; /* IRQ number */ 194 }; 195 196 #define IRQNAMESIZE sizeof("footbridge irq 31") 197 198 struct intrq { 199 TAILQ_HEAD(, intrhand) iq_list; /* handler list */ 200 struct evcnt iq_ev; /* event counter */ 201 int iq_mask; /* IRQs to mask while handling */ 202 int iq_levels; /* IPL_*'s this IRQ has */ 203 int iq_ist; /* share type */ 204 char iq_name[IRQNAMESIZE]; /* interrupt name */ 205 }; 206 207 #endif /* _LOCORE */ 208 209 #endif /* _FOOTBRIDGE_INTR_H */ 210
Indexes created Wed Oct 01 15:09:59 GMT 2025