pic_openpic.c revision 1.1.2.4
1 /* $NetBSD: pic_openpic.c,v 1.1.2.4 2007/05/03 16:00:15 nisimura 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 1.1.2.4 2007/05/03 16:00:15 nisimura 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 <machine/autoconf.h> 45 #include <arch/powerpc/pic/picvar.h> 46 47 static int opic_irq_is_enabled(struct pic_ops *, int); 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_clear_irq(struct pic_ops *, int); 51 static int opic_get_irq(struct pic_ops *); 52 static void opic_ack_irq(struct pic_ops *, int); 53 54 struct openpic_ops { 55 struct pic_ops pic; 56 uint32_t enable_mask; 57 }; 58 59 struct pic_ops * 60 setup_openpic(uint32_t addr, int maxirq, int passthrough) 61 { 62 struct openpic_ops *openpic; 63 struct pic_ops *pic; 64 int irq; 65 u_int x; 66 67 openpic_base = (void *)addr; 68 openpic = malloc(sizeof(struct openpic_ops), M_DEVBUF, M_NOWAIT); 69 KASSERT(openpic != NULL); 70 pic = &openpic->pic; 71 72 if (maxirq == -1) 73 maxirq = 1 + ((openpic_read(OPENPIC_FEATURE) >> 16) & 0x7ff); 74 75 pic->pic_numintrs = maxirq; 76 pic->pic_cookie = (void *)addr; 77 pic->pic_irq_is_enabled = opic_irq_is_enabled; 78 pic->pic_enable_irq = opic_enable_irq; 79 pic->pic_reenable_irq = opic_enable_irq; 80 pic->pic_disable_irq = opic_disable_irq; 81 pic->pic_clear_irq = opic_clear_irq; 82 pic->pic_get_irq = opic_get_irq; 83 pic->pic_ack_irq = opic_ack_irq; 84 pic->pic_establish_irq = dummy_pic_establish_intr; 85 strcpy(pic->pic_name, "openpic"); 86 pic_add(pic); 87 88 /* disable all interrupts */ 89 for (irq = 0; irq < maxirq; irq++) 90 openpic_write(OPENPIC_SRC_VECTOR(irq), OPENPIC_IMASK); 91 92 openpic_set_priority(0, 15); 93 94 x = openpic_read(OPENPIC_CONFIG); 95 if (passthrough) { 96 x &= ~OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 97 } else { 98 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 99 } 100 openpic_write(OPENPIC_CONFIG, x); 101 102 /* send all interrupts to CPU 0 */ 103 for (irq = 0; irq < maxirq; irq++) 104 openpic_write(OPENPIC_IDEST(irq), 1 << 0); 105 106 for (irq = 0; irq < maxirq; irq++) { 107 x = irq; 108 x |= OPENPIC_IMASK; 109 x |= OPENPIC_POLARITY_POSITIVE; 110 x |= OPENPIC_SENSE_LEVEL; 111 x |= 8 << OPENPIC_PRIORITY_SHIFT; 112 openpic_write(OPENPIC_SRC_VECTOR(irq), x); 113 } 114 115 openpic_set_priority(0, 0); 116 117 /* clear all pending interrunts */ 118 for (irq = 0; irq < 256; irq++) { 119 openpic_read_irq(0); 120 openpic_eoi(0); 121 } 122 123 for (irq = 0; irq < maxirq; irq++) 124 openpic_disable_irq(irq); 125 126 #ifdef MULTIPROCESSOR 127 x = openpic_read(OPENPIC_IPI_VECTOR(1)); 128 x &= ~(OPENPIC_IMASK | OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK); 129 x |= (15 << OPENPIC_PRIORITY_SHIFT) | IPI_VECTOR; 130 openpic_write(OPENPIC_IPI_VECTOR(1), x); 131 #endif 132 133 return pic; 134 } 135 136 static int 137 opic_irq_is_enabled(struct pic_ops *pic, int irq) 138 { 139 /* XXX */ 140 141 return 1; 142 } 143 144 static void 145 opic_enable_irq(struct pic_ops *pic, int irq, int type) 146 { 147 148 openpic_enable_irq(irq, type); 149 } 150 151 static void 152 opic_disable_irq(struct pic_ops *pic, int irq) 153 { 154 155 openpic_disable_irq(irq); 156 } 157 158 static void 159 opic_clear_irq(struct pic_ops *pic, int irq) 160 { 161 162 /* we only use ack here */ 163 } 164 165 static int 166 opic_get_irq(struct pic_ops *pic) 167 { 168 169 return openpic_read_irq(cpu_number()); 170 } 171 172 static void 173 opic_ack_irq(struct pic_ops *pic, int irq) 174 { 175 176 openpic_eoi(cpu_number()); 177 } 178
Indexes created Tue Oct 28 02:10:10 GMT 2025