1 /* $NetBSD: pci_machdep.h,v 1.17 2001/06/08 04:48:57 simonb 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 definitions for PCI autoconfiguration. 35 */ 36 #define __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH 37 38 /* 39 * Many i386 PCI systems only work properly with I/O mapped space, in 40 * particular, buses behind PCI-PCI bridges may not have memory 41 * space mapped at all. For this reason, tell drivers that have 42 * a choice that we "prefer" I/O space. 43 */ 44 #define PCI_PREFER_IOSPACE 45 46 /* 47 * i386-specific PCI structure and type definitions. 48 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE. 49 * 50 * Configuration tag; created from a {bus,device,function} triplet by 51 * pci_make_tag(), and passed to pci_conf_read() and pci_conf_write(). 52 * We could instead always pass the {bus,device,function} triplet to 53 * the read and write routines, but this would cause extra overhead. 54 * 55 * Mode 2 is historical and deprecated by the Revision 2.0 specification. 56 */ 57 union i386_pci_tag_u { 58 u_int32_t mode1; 59 struct { 60 u_int16_t port; 61 u_int8_t enable; 62 u_int8_t forward; 63 } mode2; 64 }; 65 66 extern struct i386_bus_dma_tag pci_bus_dma_tag; 67 68 /* 69 * Types provided to machine-independent PCI code 70 */ 71 typedef void *pci_chipset_tag_t; 72 typedef union i386_pci_tag_u pcitag_t; 73 typedef int pci_intr_handle_t; 74 75 /* 76 * i386-specific PCI variables and functions. 77 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE. 78 */ 79 extern int pci_mode; 80 int pci_mode_detect(void); 81 int pci_bus_flags(void); 82 struct pci_attach_args; 83 84 /* 85 * Functions provided to machine-independent PCI code. 86 */ 87 void pci_attach_hook(struct device *, struct device *, 88 struct pcibus_attach_args *); 89 int pci_bus_maxdevs(pci_chipset_tag_t, int); 90 pcitag_t pci_make_tag(pci_chipset_tag_t, int, int, int); 91 void pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 92 int *, int *, int *); 93 pcireg_t pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 94 void pci_conf_write(pci_chipset_tag_t, pcitag_t, int, 95 pcireg_t); 96 int pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *); 97 const char *pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t); 98 const struct evcnt *pci_intr_evcnt(pci_chipset_tag_t, pci_intr_handle_t); 99 void *pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t, 100 int, int (*)(void *), void *); 101 void pci_intr_disestablish(pci_chipset_tag_t, void *); 102 103 /* 104 * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED 105 * BY PORTABLE CODE. 106 */ 107 108 /* 109 * Section 6.2.4, `Miscellaneous Functions' of the PCI Specification, 110 * says that 255 means `unknown' or `no connection' to the interrupt 111 * controller on a PC. 112 */ 113 #define I386_PCI_INTERRUPT_LINE_NO_CONNECTION 0xff 114