pic_prepivr.c revision 1.6.6.1
1 1.6.6.1 mrg /* $NetBSD: pic_prepivr.c,v 1.6.6.1 2012/02/18 07:32:59 mrg Exp $ */ 2 1.2 garbled 3 1.2 garbled /*- 4 1.2 garbled * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 1.2 garbled * All rights reserved. 6 1.2 garbled * 7 1.2 garbled * This code is derived from software contributed to The NetBSD Foundation 8 1.2 garbled * by Tim Rightnour 9 1.2 garbled * 10 1.2 garbled * Redistribution and use in source and binary forms, with or without 11 1.2 garbled * modification, are permitted provided that the following conditions 12 1.2 garbled * are met: 13 1.2 garbled * 1. Redistributions of source code must retain the above copyright 14 1.2 garbled * notice, this list of conditions and the following disclaimer. 15 1.2 garbled * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 garbled * notice, this list of conditions and the following disclaimer in the 17 1.2 garbled * documentation and/or other materials provided with the distribution. 18 1.2 garbled * 19 1.2 garbled * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 garbled * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 garbled * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 garbled * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 garbled * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 garbled * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 garbled * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 garbled * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 garbled * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 garbled * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 garbled * POSSIBILITY OF SUCH DAMAGE. 30 1.2 garbled */ 31 1.2 garbled 32 1.2 garbled #include <sys/cdefs.h> 33 1.6.6.1 mrg __KERNEL_RCSID(0, "$NetBSD: pic_prepivr.c,v 1.6.6.1 2012/02/18 07:32:59 mrg Exp $"); 34 1.2 garbled 35 1.2 garbled #include <sys/param.h> 36 1.6.6.1 mrg #include <sys/kmem.h> 37 1.2 garbled #include <sys/kernel.h> 38 1.5 matt #include <sys/intr.h> 39 1.2 garbled 40 1.2 garbled #include <uvm/uvm_extern.h> 41 1.2 garbled 42 1.2 garbled #include <machine/pio.h> 43 1.2 garbled 44 1.6 matt #include <powerpc/pic/picvar.h> 45 1.2 garbled 46 1.2 garbled #include <dev/isa/isareg.h> 47 1.2 garbled #include <dev/isa/isavar.h> 48 1.2 garbled 49 1.3 garbled static int prepivr_get_irq(struct pic_ops *, int); 50 1.3 garbled static int motivr_get_irq(struct pic_ops *, int); 51 1.2 garbled static void prepivr_establish_irq(struct pic_ops *, int, int, int); 52 1.2 garbled 53 1.2 garbled vaddr_t prep_intr_reg; /* PReP interrupt vector register */ 54 1.2 garbled uint32_t prep_intr_reg_off; /* IVR offset within the mapped page */ 55 1.2 garbled 56 1.2 garbled #define IO_ELCR1 0x4d0 57 1.2 garbled #define IO_ELCR2 0x4d1 58 1.2 garbled 59 1.2 garbled /* 60 1.2 garbled * Prior to calling init_prepivr, the port is expected to have mapped the 61 1.2 garbled * page containing the IVR with mapiodev to prep_intr_reg and set up the 62 1.2 garbled * prep_intr_reg_off. 63 1.2 garbled */ 64 1.2 garbled 65 1.2 garbled struct pic_ops * 66 1.2 garbled setup_prepivr(int ivrtype) 67 1.2 garbled { 68 1.2 garbled struct i8259_ops *prepivr; 69 1.2 garbled struct pic_ops *pic; 70 1.2 garbled uint32_t pivr; 71 1.2 garbled 72 1.6.6.1 mrg prepivr = kmem_alloc(sizeof(*prepivr), KM_SLEEP); 73 1.2 garbled KASSERT(prepivr != NULL); 74 1.2 garbled pic = &prepivr->pic; 75 1.2 garbled 76 1.2 garbled pivr = prep_intr_reg + prep_intr_reg_off; 77 1.2 garbled pic->pic_numintrs = 16; 78 1.2 garbled pic->pic_cookie = (void *)pivr; 79 1.2 garbled pic->pic_enable_irq = i8259_enable_irq; 80 1.2 garbled pic->pic_reenable_irq = i8259_enable_irq; 81 1.2 garbled pic->pic_disable_irq = i8259_disable_irq; 82 1.2 garbled if (ivrtype == PIC_IVR_MOT) 83 1.2 garbled pic->pic_get_irq = motivr_get_irq; 84 1.2 garbled else 85 1.2 garbled pic->pic_get_irq = prepivr_get_irq; 86 1.2 garbled pic->pic_ack_irq = i8259_ack_irq; 87 1.2 garbled pic->pic_establish_irq = prepivr_establish_irq; 88 1.2 garbled pic->pic_finish_setup = NULL; 89 1.2 garbled strcpy(pic->pic_name, "prepivr"); 90 1.2 garbled pic_add(pic); 91 1.2 garbled prepivr->pending_events = 0; 92 1.2 garbled prepivr->enable_mask = 0xffffffff; 93 1.2 garbled prepivr->irqs = 0; 94 1.2 garbled 95 1.2 garbled /* initialize the ELCR */ 96 1.2 garbled isa_outb(IO_ELCR1, (0 >> 0) & 0xff); 97 1.2 garbled isa_outb(IO_ELCR2, (0 >> 8) & 0xff); 98 1.2 garbled i8259_initialize(); 99 1.2 garbled 100 1.2 garbled return pic; 101 1.2 garbled } 102 1.2 garbled 103 1.2 garbled static void 104 1.2 garbled prepivr_establish_irq(struct pic_ops *pic, int irq, int type, int maxlevel) 105 1.2 garbled { 106 1.2 garbled u_int8_t elcr[2]; 107 1.2 garbled int icu, bit; 108 1.2 garbled 109 1.2 garbled icu = irq / 8; 110 1.2 garbled bit = irq % 8; 111 1.2 garbled elcr[0] = isa_inb(IO_ELCR1); 112 1.2 garbled elcr[1] = isa_inb(IO_ELCR2); 113 1.2 garbled 114 1.2 garbled if (type == IST_LEVEL) 115 1.2 garbled elcr[icu] |= 1 << bit; 116 1.2 garbled else 117 1.2 garbled elcr[icu] &= ~(1 << bit); 118 1.2 garbled 119 1.2 garbled isa_outb(IO_ELCR1, elcr[0]); 120 1.2 garbled isa_outb(IO_ELCR2, elcr[1]); 121 1.2 garbled } 122 1.2 garbled 123 1.2 garbled static int 124 1.3 garbled motivr_get_irq(struct pic_ops *pic, int mode) 125 1.2 garbled { 126 1.2 garbled int irq; 127 1.2 garbled 128 1.3 garbled irq = i8259_get_irq(pic, mode); 129 1.2 garbled /* read the IVR to ack it */ 130 1.2 garbled (void)inb(pic->pic_cookie); 131 1.2 garbled 132 1.3 garbled /* i8259_get_irq will return 255 by itself, so just pass it on */ 133 1.2 garbled return irq; 134 1.2 garbled } 135 1.2 garbled 136 1.2 garbled static int 137 1.3 garbled prepivr_get_irq(struct pic_ops *pic, int mode) 138 1.2 garbled { 139 1.2 garbled int irq; 140 1.2 garbled 141 1.2 garbled irq = inb(pic->pic_cookie); 142 1.3 garbled 143 1.3 garbled if (irq == 0 && mode == PIC_GET_IRQ) 144 1.2 garbled return 255; 145 1.3 garbled if (irq == 7 && mode == PIC_GET_RECHECK) 146 1.2 garbled return 255; 147 1.2 garbled 148 1.2 garbled return irq; 149 1.2 garbled } 150
Indexes created Tue Oct 28 12:10:06 GMT 2025