1 /* $OpenBSD: pci_machdep.h,v 1.32 2020/06/17 06:17:19 dlg Exp $ */ 2 /* $NetBSD: pci_machdep.h,v 1.7 1997/06/06 23:29:18 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1994 Charles Hannum. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles Hannum. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * Machine-specific definitions for PCI autoconfiguration. 36 */ 37 38 /* 39 * i386-specific PCI structure and type definitions. 40 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE. 41 * 42 * Configuration tag; created from a {bus,device,function} triplet by 43 * pci_make_tag(), and passed to pci_conf_read() and pci_conf_write(). 44 * We could instead always pass the {bus,device,function} triplet to 45 * the read and write routines, but this would cause extra overhead. 46 * 47 * Mode 2 is historical and deprecated by the Revision 2.0 specification. 48 */ 49 union i386_pci_tag_u { 50 u_int32_t mode1; 51 struct { 52 u_int16_t port; 53 u_int8_t enable; 54 u_int8_t forward; 55 } mode2; 56 }; 57 58 extern struct bus_dma_tag pci_bus_dma_tag; 59 60 /* 61 * Types provided to machine-independent PCI code 62 */ 63 typedef void *pci_chipset_tag_t; 64 typedef union i386_pci_tag_u pcitag_t; 65 66 typedef 67 struct { 68 pcitag_t tag; 69 int line, pin; 70 void *link; 71 } pci_intr_handle_t; 72 73 /* 74 * i386-specific PCI variables and functions. 75 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE. 76 */ 77 extern int pci_mode; 78 int pci_mode_detect(void); 79 80 extern struct extent *pciio_ex; 81 extern struct extent *pcimem_ex; 82 extern struct extent *pcibus_ex; 83 void pci_init_extents(void); 84 85 /* 86 * Functions provided to machine-independent PCI code. 87 */ 88 void pci_attach_hook(struct device *, struct device *, 89 struct pcibus_attach_args *); 90 int pci_bus_maxdevs(pci_chipset_tag_t, int); 91 pcitag_t pci_make_tag(pci_chipset_tag_t, int, int, int); 92 int pci_conf_size(pci_chipset_tag_t, pcitag_t); 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 struct pci_attach_args; 97 int pci_intr_map_msi(struct pci_attach_args *, pci_intr_handle_t *); 98 int pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *); 99 #define pci_intr_line(c, ih) ((ih).line) 100 const char *pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t); 101 void *pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t, 102 int, int (*)(void *), void *, const char *); 103 void *pci_intr_establish_cpu(pci_chipset_tag_t, pci_intr_handle_t, 104 int, struct cpu_info *, 105 int (*)(void *), void *, const char *); 106 void pci_intr_disestablish(pci_chipset_tag_t, void *); 107 void pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 108 int *, int *, int *); 109 #define pci_probe_device_hook(c, a) (0) 110 111 void pci_dev_postattach(struct device *, struct pci_attach_args *); 112 113 pcireg_t pci_min_powerstate(pci_chipset_tag_t, pcitag_t); 114 void pci_set_powerstate_md(pci_chipset_tag_t, pcitag_t, int, int); 115 116 void pci_mcfg_init(bus_space_tag_t, bus_addr_t, int, int, int); 117 pci_chipset_tag_t pci_lookup_segment(int); 118 119 static inline int 120 pci_intr_map_msix(struct pci_attach_args *pa, int vec, pci_intr_handle_t *ihp) 121 { 122 return -1; 123 } 124 125 /* 126 * Section 6.2.4, `Miscellaneous Functions' of the PIC Specification, 127 * says that 255 means `unknown' or `no connection' to the interrupt 128 * controller on a PC. 129 */ 130 #define I386_PCI_INTERRUPT_LINE_NO_CONNECTION 0xff 131 132 /* 133 * PCI address space is shared with ISA, so avoid legacy ISA I/O 134 * registers. 135 */ 136 #define PCI_IO_START 0x400 137 #define PCI_IO_END 0xffff 138 139 /* 140 * Avoid the DOS Compatibility Memory area. 141 */ 142 #define PCI_MEM_START 0x100000 143