1 /* NetBSD: pci_machdep.c,v 1.12 2001/06/19 11:56:27 nonaka Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 5 * Copyright (c) 1994 Charles M. Hannum. 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 Charles M. Hannum. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Machine-specific functions for PCI autoconfiguration. 35 * 36 * On PCs, there are two methods of generating PCI configuration cycles. 37 * We try to detect the appropriate mechanism for this machine and set 38 * up a few function pointers to access the correct method directly. 39 */ 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/time.h> 44 #include <sys/systm.h> 45 #include <sys/errno.h> 46 #include <sys/extent.h> 47 #include <sys/device.h> 48 49 #include <uvm/uvm_extern.h> 50 51 #define _POWERPC_BUS_DMA_PRIVATE 52 #include <machine/bus.h> 53 #include <machine/intr.h> 54 #include <machine/platform.h> 55 56 #include <dev/isa/isavar.h> 57 58 #include <dev/pci/pcivar.h> 59 #include <dev/pci/pcireg.h> 60 #include <dev/pci/pcidevs.h> 61 #include <dev/pci/pciconf.h> 62 63 /* 64 * PCI doesn't have any special needs; just use the generic versions 65 * of these functions. 66 */ 67 struct powerpc_bus_dma_tag pci_bus_dma_tag = { 68 0, /* _bounce_thresh */ 69 _bus_dmamap_create, 70 _bus_dmamap_destroy, 71 _bus_dmamap_load, 72 _bus_dmamap_load_mbuf, 73 _bus_dmamap_load_uio, 74 _bus_dmamap_load_raw, 75 _bus_dmamap_unload, 76 NULL, /* _dmamap_sync */ 77 _bus_dmamem_alloc, 78 _bus_dmamem_free, 79 _bus_dmamem_map, 80 _bus_dmamem_unmap, 81 _bus_dmamem_mmap, 82 }; 83 84 int 85 prep_pci_bus_maxdevs(void *v, int busno) 86 { 87 88 /* 89 * Bus number is irrelevant. Configuration Mechanism 1 is in 90 * use, can have devices 0-32 (i.e. the `normal' range). 91 */ 92 return (32); 93 } 94 95 96 int 97 prep_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 98 { 99 int pin = pa->pa_intrpin; 100 int line = pa->pa_intrline; 101 102 if (pin == 0) { 103 /* No IRQ used. */ 104 goto bad; 105 } 106 107 if (pin > 4) { 108 printf("pci_intr_map: bad interrupt pin %d\n", pin); 109 goto bad; 110 } 111 112 /* 113 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 114 * `unknown' or `no connection' on a PC. We assume that a device with 115 * `no connection' either doesn't have an interrupt (in which case the 116 * pin number should be 0, and would have been noticed above), or 117 * wasn't configured by the BIOS (in which case we punt, since there's 118 * no real way we can know how the interrupt lines are mapped in the 119 * hardware). 120 * 121 * XXX 122 * Since IRQ 0 is only used by the clock, and we can't actually be sure 123 * that the BIOS did its job, we also recognize that as meaning that 124 * the BIOS has not configured the device. 125 */ 126 if (line == 0 || line == 255) { 127 printf("pci_intr_map: no mapping for pin %c\n", '@' + pin); 128 goto bad; 129 } else { 130 if (line >= ICU_LEN) { 131 printf("pci_intr_map: bad interrupt line %d\n", line); 132 goto bad; 133 } 134 if (line == IRQ_SLAVE) { 135 printf("pci_intr_map: changed line 2 to line 9\n"); 136 line = 9; 137 } 138 } 139 140 *ihp = line; 141 return 0; 142 143 bad: 144 *ihp = -1; 145 return 1; 146 } 147 148 const char * 149 prep_pci_intr_string(void *v, pci_intr_handle_t ih) 150 { 151 static char irqstr[8]; /* 4 + 2 + NULL + sanity */ 152 153 if (ih == 0 || ih >= ICU_LEN || ih == IRQ_SLAVE) 154 panic("pci_intr_string: bogus handle 0x%x\n", ih); 155 156 sprintf(irqstr, "irq %d", ih); 157 return (irqstr); 158 159 } 160 161 const struct evcnt * 162 prep_pci_intr_evcnt(void *v, pci_intr_handle_t ih) 163 { 164 165 /* XXX for now, no evcnt parent reported */ 166 return NULL; 167 } 168 169 void * 170 prep_pci_intr_establish(void *v, pci_intr_handle_t ih, int level, 171 int (*func)(void *), void *arg) 172 { 173 174 if (ih == 0 || ih >= ICU_LEN || ih == IRQ_SLAVE) 175 panic("pci_intr_establish: bogus handle 0x%x\n", ih); 176 177 return isa_intr_establish(NULL, ih, IST_LEVEL, level, func, arg); 178 } 179 180 void 181 prep_pci_intr_disestablish(void *v, void *cookie) 182 { 183 184 isa_intr_disestablish(NULL, cookie); 185 } 186 187 void 188 prep_pci_conf_interrupt(void *v, int bus, int dev, int pin, 189 int swiz, int *iline) 190 { 191 192 (*platform->pci_intr_fixup)(bus, dev, iline); 193 } 194 195 int 196 prep_pci_conf_hook(void *v, int bus, int dev, int func, pcireg_t id) 197 { 198 199 /* 200 * The P9100 board found in some IBM machines cannot be 201 * over-configured. 202 */ 203 if (PCI_VENDOR(id) == PCI_VENDOR_WEITEK && 204 PCI_PRODUCT(id) == PCI_PRODUCT_WEITEK_P9100) 205 return 0; 206 207 return (PCI_CONF_ALL & ~PCI_CONF_MAP_ROM); 208 } 209