2 * Copyright (c) 2000, 2001 Michael Smith
3 * Copyright (c) 2000 BSDi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
27 * $FreeBSD: src/sys/dev/acpica/Osd/OsdHardware.c,v 1.10.2.1 2003/08/22 20:49:21 jhb Exp $
28 * $DragonFly: src/sys/dev/acpica/Osd/Attic/OsdHardware.c,v 1.3 2004/02/21 06:37:06 dillon Exp $
32 * 6.7 : Hardware Abstraction
37 #include <machine/bus_pio.h>
38 #include <machine/bus.h>
39 #include <machine/pci_cfgreg.h>
40 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
41 #include <dev/pci/pcireg.h>
43 #include <bus/pci/pcireg.h>
47 * ACPICA's rather gung-ho approach to hardware resource ownership is a little
48 * troublesome insofar as there is no easy way for us to know in advance
49 * exactly which I/O resources it's going to want to use.
51 * In order to deal with this, we ignore resource ownership entirely, and simply
52 * use the native I/O space accessor functionality. This is Evil, but it works.
54 * XXX use an intermediate #define for the tag/handle
58 #define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO
59 #define ACPI_BUS_HANDLE 0
62 #define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO
63 #define ACPI_BUS_HANDLE 0
66 #define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO
67 #define ACPI_BUS_HANDLE 0
72 ACPI_IO_ADDRESS InPort,
78 *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
81 *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
84 *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
87 /* debug trap goes here */
96 ACPI_IO_ADDRESS OutPort,
102 bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
105 bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
108 bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
111 /* debug trap goes here */
119 AcpiOsReadPciConfiguration (
125 u_int32_t byte_width = Width / 8;
128 if (!pci_cfgregopen())
129 return(AE_NOT_EXIST);
131 val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register, byte_width);
134 *(u_int8_t *)Value = val & 0xff;
137 *(u_int16_t *)Value = val & 0xffff;
140 *(u_int32_t *)Value = val;
143 /* debug trap goes here */
153 AcpiOsWritePciConfiguration (
159 u_int32_t byte_width = Width / 8;
161 if (!pci_cfgregopen())
162 return(AE_NOT_EXIST);
164 pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register, Value, byte_width);
169 /* XXX should use acpivar.h but too many include dependencies */
170 extern ACPI_STATUS acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int
174 * Depth-first recursive case for finding the bus, given the slot/function.
177 acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
180 ACPI_OBJECT_TYPE type;
182 int bus, slot, func, class, subclass, header;
184 /* Try to get the _BBN object of the root, otherwise assume it is 0 */
187 if (ACPI_FAILURE(acpi_EvaluateInteger(root, "_BBN", &bus)) &&
189 printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
192 if (ACPI_FAILURE(AcpiGetParent(curr, &parent)))
195 /* First, recurse up the tree until we find the host bus */
196 bus = acpi_bus_number(root, parent, PciId);
198 /* Validate parent bus device type */
199 if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
200 printf("acpi_bus_number: not a device, type %d\n", type);
203 /* Get the parent's slot and function */
204 if (ACPI_FAILURE(acpi_EvaluateInteger(parent, "_ADR", &adr))) {
205 printf("acpi_bus_number: can't get _ADR\n");
208 slot = ACPI_HIWORD(adr);
209 func = ACPI_LOWORD(adr);
211 /* Is this a PCI-PCI or Cardbus-PCI bridge? */
212 class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
213 if (class != PCIC_BRIDGE)
215 subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
216 /* Find the header type, masking off the multifunction bit */
217 header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & 0x7f;
218 if (header == 1 && subclass == PCIS_BRIDGE_PCI)
219 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
220 if (header == 2 && subclass == PCIS_BRIDGE_CARDBUS)
221 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
226 * Find the bus number for a device
228 * rhandle: handle for the root bus
229 * chandle: handle for the device
230 * PciId: pointer to device slot and function, we fill out bus
241 if (pci_cfgregopen() == 0)
242 panic("AcpiOsDerivePciId unable to initialize pci bus");
244 /* Try to read _BBN for bus number if we're at the root */
246 if (rhandle == chandle) {
247 if (ACPI_FAILURE(acpi_EvaluateInteger(rhandle, "_BBN", &bus)) &&
249 printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
252 * Get the parent handle and call the recursive case. It is not
253 * clear why we seem to be getting a chandle that points to a child
254 * of the desired slot/function but passing in the parent handle
257 if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent)))
258 bus = acpi_bus_number(rhandle, parent, *PciId);
261 printf("AcpiOsDerivePciId: bus %d dev %d func %d\n",
262 (*PciId)->Bus, (*PciId)->Device, (*PciId)->Function);