1 /*- 2 * Copyright (c) 2000, 2001 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: src/sys/dev/acpica/Osd/OsdHardware.c,v 1.13 2004/04/14 03:39:08 njl Exp $ 28 */ 29 30 /* 31 * 6.7 : Hardware Abstraction 32 */ 33 34 #include "acpi.h" 35 36 #include <sys/bus.h> 37 #include <bus/pci/pci_cfgreg.h> 38 #include <bus/pci/pcireg.h> 39 40 /* 41 * ACPICA's rather gung-ho approach to hardware resource ownership is a little 42 * troublesome insofar as there is no easy way for us to know in advance 43 * exactly which I/O resources it's going to want to use. 44 * 45 * In order to deal with this, we ignore resource ownership entirely, and simply 46 * use the native I/O space accessor functionality. This is Evil, but it works. 47 * 48 * XXX use an intermediate #define for the tag/handle 49 */ 50 51 #ifdef __i386__ 52 #define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO 53 #define ACPI_BUS_HANDLE 0 54 #endif 55 #ifdef __x86_64__ 56 #define ACPI_BUS_SPACE_IO X86_64_BUS_SPACE_IO 57 #define ACPI_BUS_HANDLE 0 58 #endif 59 60 ACPI_STATUS 61 AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width) 62 { 63 switch (Width) { 64 case 8: 65 *Value = bus_space_read_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort); 66 break; 67 case 16: 68 *Value = bus_space_read_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort); 69 break; 70 case 32: 71 *Value = bus_space_read_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort); 72 break; 73 } 74 75 return (AE_OK); 76 } 77 78 ACPI_STATUS 79 AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width) 80 { 81 switch (Width) { 82 case 8: 83 bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); 84 break; 85 case 16: 86 bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); 87 break; 88 case 32: 89 bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); 90 break; 91 } 92 93 return (AE_OK); 94 } 95 96 ACPI_STATUS 97 AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, UINT64 *Value, 98 UINT32 Width) 99 { 100 int bytes = Width / 8; 101 102 if (Width == 64) 103 return (AE_SUPPORT); 104 105 if (!pci_cfgregopen()) 106 return (AE_NOT_EXIST); 107 108 *Value = pci_cfgregread(PciId->Bus, PciId->Device, 109 PciId->Function, Register, bytes); 110 *Value &= (1 << (bytes * 8)) - 1; 111 112 return (AE_OK); 113 } 114 115 116 ACPI_STATUS 117 AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, 118 UINT64 Value, UINT32 Width) 119 { 120 if (Width == 64) 121 return (AE_SUPPORT); 122 123 if (!pci_cfgregopen()) 124 return (AE_NOT_EXIST); 125 126 pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register, 127 (uint32_t)Value, Width / 8); /* XXX casting */ 128 129 return (AE_OK); 130 } 131