pic_openpic.c revision 1.2.14.2
1 /* $NetBSD: pic_openpic.c,v 1.2.14.2 2008/01/19 12:14:43 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 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. Neither the name of The NetBSD Foundation nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: pic_openpic.c,v 1.2.14.2 2008/01/19 12:14:43 bouyer Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 39 #include <uvm/uvm_extern.h> 40 41 #include <machine/pio.h> 42 #include <powerpc/openpic.h> 43 44 #include <arch/powerpc/pic/picvar.h> 45 46 #include "opt_interrupt.h" 47 48 static void opic_enable_irq(struct pic_ops *, int, int); 49 static void opic_disable_irq(struct pic_ops *, int); 50 static void opic_establish_irq(struct pic_ops*, int, int, int); 51 52 struct pic_ops * 53 setup_openpic(void *addr, int passthrough) 54 { 55 struct openpic_ops *opicops; 56 struct pic_ops *pic; 57 int irq; 58 u_int x; 59 60 openpic_base = (void *)addr; 61 opicops = malloc(sizeof(struct openpic_ops), M_DEVBUF, M_NOWAIT); 62 KASSERT(opicops != NULL); 63 pic = &opicops->pic; 64 65 x = openpic_read(OPENPIC_FEATURE); 66 if (((x & 0x07ff0000) >> 16) == 0) 67 panic("setup_openpic() called on distributed openpic"); 68 69 aprint_normal("OpenPIC Version 1.%d: " 70 "Supports %d CPUs and %d interrupt sources.\n", 71 x & 0xff, ((x & 0x1f00) >> 8) + 1, ((x & 0x07ff0000) >> 16) + 1); 72 73 pic->pic_numintrs = ((x & 0x07ff0000) >> 16) + 1; 74 pic->pic_cookie = addr; 75 pic->pic_enable_irq = opic_enable_irq; 76 pic->pic_reenable_irq = opic_enable_irq; 77 pic->pic_disable_irq = opic_disable_irq; 78 pic->pic_get_irq = opic_get_irq; 79 pic->pic_ack_irq = opic_ack_irq; 80 pic->pic_establish_irq = opic_establish_irq; 81 pic->pic_finish_setup = opic_finish_setup; 82 opicops->isu = NULL; 83 opicops->nrofisus = 0; /* internal only */ 84 opicops->flags = 0; /* no flags (yet) */ 85 opicops->irq_per = NULL; /* internal ISU only */ 86 strcpy(pic->pic_name, "openpic"); 87 pic_add(pic); 88 89 /* 90 * the following sequence should make the same effects as openpic 91 * controller reset by writing a one at the self-clearing 92 * OPENPIC_CONFIG_RESET bit. Please check the document of your 93 * OpenPIC compliant interrupt controller and see whether #else 94 * portion can work as described. 95 */ 96 #if 1 97 openpic_set_priority(0, 15); 98 99 for (irq = 0; irq < pic->pic_numintrs; irq++) { 100 /* make sure to keep disabled */ 101 openpic_write(OPENPIC_SRC_VECTOR(irq), OPENPIC_IMASK); 102 /* send all interrupts to CPU 0 */ 103 openpic_write(OPENPIC_IDEST(irq), 1 << 0); 104 } 105 106 x = openpic_read(OPENPIC_CONFIG); 107 if (passthrough) 108 x &= ~OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 109 else 110 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 111 openpic_write(OPENPIC_CONFIG, x); 112 113 openpic_write(OPENPIC_SPURIOUS_VECTOR, 0xff); 114 115 openpic_set_priority(0, 0); 116 117 /* clear all pending interrunts */ 118 for (irq = 0; irq < pic->pic_numintrs; irq++) { 119 openpic_read_irq(0); 120 openpic_eoi(0); 121 } 122 #else 123 irq = 0; 124 openpic_write(OPENPIC_CONFIG, OPENPIC_CONFIG_RESET); 125 do { 126 x = openpic_read(OPENPIC_CONFIG); 127 } while (x & OPENPIC_CONFIG_RESET); /* S1C bit */ 128 if (passthrough) 129 x &= ~OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 130 else 131 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 132 openpic_write(OPENPIC_CONFIG, x); 133 openpic_set_priority(0, 0); 134 #endif 135 136 #if 0 137 printf("timebase freq=%d\n", openpic_read(0x10f0)); 138 #endif 139 return pic; 140 } 141 142 static void 143 opic_establish_irq(struct pic_ops *pic, int irq, int type, int pri) 144 { 145 int realpri = max(1, min(15, pri)); 146 uint32_t x; 147 148 x = irq; 149 x |= OPENPIC_IMASK; 150 x |= (irq == 0) ? 151 OPENPIC_POLARITY_POSITIVE : OPENPIC_POLARITY_NEGATIVE; 152 x |= (type == IST_EDGE) ? OPENPIC_SENSE_EDGE : OPENPIC_SENSE_LEVEL; 153 x |= realpri << OPENPIC_PRIORITY_SHIFT; 154 openpic_write(OPENPIC_SRC_VECTOR(irq), x); 155 156 aprint_debug("%s: setting IRQ %d to priority %d\n", __func__, irq, 157 realpri); 158 } 159 160 static void 161 opic_enable_irq(struct pic_ops *pic, int irq, int type) 162 { 163 u_int x; 164 165 x = openpic_read(OPENPIC_SRC_VECTOR(irq)); 166 x &= ~OPENPIC_IMASK; 167 openpic_write(OPENPIC_SRC_VECTOR(irq), x); 168 } 169 170 static void 171 opic_disable_irq(struct pic_ops *pic, int irq) 172 { 173 u_int x; 174 175 x = openpic_read(OPENPIC_SRC_VECTOR(irq)); 176 x |= OPENPIC_IMASK; 177 openpic_write(OPENPIC_SRC_VECTOR(irq), x); 178 } 179
Indexes created Tue Oct 28 02:10:10 GMT 2025