footbridge_intr.h revision 1.2
1 /* $NetBSD: footbridge_intr.h,v 1.2 2002/11/03 21:43:31 chris Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Mark Brinicombe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe 18 * for the NetBSD Project. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef _FOOTBRIDGE_INTR_H_ 37 #define _FOOTBRIDGE_INTR_H_ 38 39 #include <arm/armreg.h> 40 41 /* Define the various Interrupt Priority Levels */ 42 43 /* Hardware Interrupt Priority Levels are not mutually exclusive. */ 44 45 #define IPL_NONE 0 /* nothing */ 46 #define IPL_SOFT 1 /* generic soft interrupts */ 47 #define IPL_SOFTCLOCK 2 /* clock software interrupts */ 48 #define IPL_SOFTNET 3 /* network software interrupts */ 49 #define IPL_BIO 4 /* block I/O */ 50 #define IPL_NET 5 /* network */ 51 #define IPL_SOFTSERIAL 6 /* serial software interrupts */ 52 #define IPL_TTY 7 /* terminal */ 53 #define IPL_IMP 8 /* memory allocation */ 54 #define IPL_AUDIO 9 /* audio */ 55 #define IPL_CLOCK 10 /* clock */ 56 #define IPL_STATCLOCK 11 /* statclock */ 57 #define IPL_HIGH 12 /* everything */ 58 #define IPL_SERIAL 13 /* serial */ 59 60 #define NIPL 14 61 62 #define IST_UNUSABLE -1 /* interrupt cannot be used */ 63 #define IST_NONE 0 /* none (dummy) */ 64 #define IST_PULSE 1 /* pulsed */ 65 #define IST_EDGE 2 /* edge-triggered */ 66 #define IST_LEVEL 3 /* level-triggered */ 67 68 #define __NEWINTR /* enables new hooks in cpu_fork()/cpu_switch() */ 69 70 #ifndef _LOCORE 71 #include <arm/cpufunc.h> 72 73 #include <arm/footbridge/dc21285mem.h> 74 #include <arm/footbridge/dc21285reg.h> 75 76 #define INT_SWMASK \ 77 ((1U << IRQ_SOFTINT) | (1U << IRQ_RESERVED0) | \ 78 (1U << IRQ_RESERVED1) | (1U << IRQ_RESERVED2)) 79 #define ICU_INT_HWMASK (0xffffffff & ~(INT_SWMASK | (1U << IRQ_RESERVED3))) 80 81 /* only call this with interrupts off */ 82 static __inline void __attribute__((__unused__)) 83 footbridge_set_intrmask(void) 84 { 85 extern __volatile uint32_t intr_enabled; 86 /* fetch once so we write the same number to both registers */ 87 uint32_t tmp = intr_enabled & ICU_INT_HWMASK; 88 89 ((__volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_SET>>2] = tmp; 90 ((__volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_CLEAR>>2] = ~tmp; 91 } 92 93 static __inline void __attribute__((__unused__)) 94 footbridge_splx(int newspl) 95 { 96 extern __volatile uint32_t intr_enabled; 97 extern __volatile int current_spl_level; 98 extern __volatile int footbridge_ipending; 99 extern void footbridge_do_pending(void); 100 int oldirqstate, hwpend; 101 102 current_spl_level = newspl; 103 104 hwpend = (footbridge_ipending & ICU_INT_HWMASK) & ~newspl; 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 if ((footbridge_ipending & INT_SWMASK) & ~newspl) 113 footbridge_do_pending(); 114 } 115 116 static __inline int __attribute__((__unused__)) 117 footbridge_splraise(int ipl) 118 { 119 extern __volatile int current_spl_level; 120 extern int footbridge_imask[]; 121 int old; 122 123 old = current_spl_level; 124 current_spl_level |= footbridge_imask[ipl]; 125 126 return (old); 127 } 128 129 static __inline int __attribute__((__unused__)) 130 footbridge_spllower(int ipl) 131 { 132 extern __volatile int current_spl_level; 133 extern int footbridge_imask[]; 134 int old = current_spl_level; 135 136 footbridge_splx(footbridge_imask[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/device.h> 158 #include <sys/queue.h> 159 #include <machine/irqhandler.h> 160 161 #define splsoft() _splraise(IPL_SOFT) 162 #define splsoftclock() _splraise(IPL_SOFTCLOCK) 163 #define splsoftnet() _splraise(IPL_SOFTNET) 164 #define splbio() _splraise(IPL_BIO) 165 #define splnet() _splraise(IPL_NET) 166 #define splsoftserial() _splraise(IPL_SOFTSERIAL) 167 #define spltty() _splraise(IPL_TTY) 168 #define spllpt() spltty() 169 #define splvm() _splraise(IPL_IMP) 170 #define splaudio() _splraise(IPL_AUDIO) 171 #define splclock() _splraise(IPL_CLOCK) 172 #define splstatclock() _splraise(IPL_STATCLOCK) 173 #define splhigh() _splraise(IPL_HIGH) 174 #define splserial() _splraise(IPL_SERIAL) 175 176 #define spl0() (void)_spllower(IPL_NONE) 177 #define spllowersoftclock() (void)_spllower(IPL_SOFTCLOCK) 178 179 #define splsched() splhigh() 180 #define spllock() splhigh() 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 07:09:59 GMT 2025