1 /* $NetBSD: pci_machdep.h,v 1.6 2005/06/20 11:04:15 sekiya 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 #ifndef _X86_PCI_MACHDEP_H_ 34 #define _X86_PCI_MACHDEP_H_ 35 36 /* 37 * Machine-specific definitions for PCI autoconfiguration. 38 */ 39 #define __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH 40 41 /* 42 * Many i386 PCI systems only work properly with I/O mapped space, in 43 * particular, buses behind PCI-PCI bridges may not have memory 44 * space mapped at all. For this reason, tell drivers that have 45 * a choice that we "prefer" I/O space. 46 */ 47 #define PCI_PREFER_IOSPACE 48 49 /* 50 * i386-specific PCI structure and type definitions. 51 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE. 52 * 53 * Configuration tag; created from a {bus,device,function} triplet by 54 * pci_make_tag(), and passed to pci_conf_read() and pci_conf_write(). 55 * We could instead always pass the {bus,device,function} triplet to 56 * the read and write routines, but this would cause extra overhead. 57 * 58 * Mode 2 is historical and deprecated by the Revision 2.0 specification. 59 */ 60 union x86_pci_tag_u { 61 u_int32_t mode1; 62 struct { 63 u_int16_t port; 64 u_int8_t enable; 65 u_int8_t forward; 66 } mode2; 67 }; 68 69 extern struct x86_bus_dma_tag pci_bus_dma_tag; 70 #ifdef _LP64 71 extern struct x86_bus_dma_tag pci_bus_dma64_tag; 72 #endif 73 74 /* 75 * Types provided to machine-independent PCI code 76 */ 77 typedef void *pci_chipset_tag_t; 78 typedef union x86_pci_tag_u pcitag_t; 79 typedef int pci_intr_handle_t; 80 81 /* 82 * i386-specific PCI variables and functions. 83 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE. 84 */ 85 extern int pci_mode; 86 int pci_mode_detect(void); 87 int pci_bus_flags(void); 88 struct pci_attach_args; 89 90 /* 91 * Functions provided to machine-independent PCI code. 92 */ 93 void pci_attach_hook(struct device *, struct device *, 94 struct pcibus_attach_args *); 95 int pci_bus_maxdevs(pci_chipset_tag_t, int); 96 pcitag_t pci_make_tag(pci_chipset_tag_t, int, int, int); 97 void pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 98 int *, int *, int *); 99 pcireg_t pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 100 void pci_conf_write(pci_chipset_tag_t, pcitag_t, int, 101 pcireg_t); 102 int pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *); 103 const char *pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t); 104 const struct evcnt *pci_intr_evcnt(pci_chipset_tag_t, pci_intr_handle_t); 105 void *pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t, 106 int, int (*)(void *), void *); 107 void pci_intr_disestablish(pci_chipset_tag_t, void *); 108 109 110 /* 111 * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED 112 * BY PORTABLE CODE. 113 */ 114 115 /* 116 * Section 6.2.4, `Miscellaneous Functions' of the PCI Specification, 117 * says that 255 means `unknown' or `no connection' to the interrupt 118 * controller on a PC. 119 */ 120 #define X86_PCI_INTERRUPT_LINE_NO_CONNECTION 0xff 121 122 void pci_device_foreach(pci_chipset_tag_t, int, 123 void (*)(pci_chipset_tag_t, pcitag_t, void*), 124 void *); 125 126 void pci_device_foreach_min(pci_chipset_tag_t, int, int, 127 void (*)(pci_chipset_tag_t, pcitag_t, void*), 128 void *); 129 130 void pci_bridge_foreach(pci_chipset_tag_t, int, int, 131 void (*) (pci_chipset_tag_t, pcitag_t, void *), void *); 132 133 134 #endif /* _X86_PCI_MACHDEP_H_ */ 135