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 1.11 2003/08/28 21:22:25 jhb Exp $
28 * $DragonFly: src/sys/dev/acpica5/Osd/OsdHardware.c,v 1.1 2004/02/21 06:48:09 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 #include <bus/pci/pcireg.h>
43 * ACPICA's rather gung-ho approach to hardware resource ownership is a little
44 * troublesome insofar as there is no easy way for us to know in advance
45 * exactly which I/O resources it's going to want to use.
47 * In order to deal with this, we ignore resource ownership entirely, and simply
48 * use the native I/O space accessor functionality. This is Evil, but it works.
50 * XXX use an intermediate #define for the tag/handle
54 #define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO
55 #define ACPI_BUS_HANDLE 0
58 #define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO
59 #define ACPI_BUS_HANDLE 0
62 #define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO
63 #define ACPI_BUS_HANDLE 0
68 ACPI_IO_ADDRESS InPort,
74 *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
77 *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
80 *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
83 /* debug trap goes here */
92 ACPI_IO_ADDRESS OutPort,
98 bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
101 bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
104 bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
107 /* debug trap goes here */
115 AcpiOsReadPciConfiguration (
121 u_int32_t byte_width = Width / 8;
124 if (!pci_cfgregopen())
125 return(AE_NOT_EXIST);
127 val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register, byte_width);
130 *(u_int8_t *)Value = val & 0xff;
133 *(u_int16_t *)Value = val & 0xffff;
136 *(u_int32_t *)Value = val;
139 /* debug trap goes here */
149 AcpiOsWritePciConfiguration (
155 u_int32_t byte_width = Width / 8;
157 if (!pci_cfgregopen())
158 return(AE_NOT_EXIST);
160 pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register, Value, byte_width);
165 /* XXX should use acpivar.h but too many include dependencies */
166 extern ACPI_STATUS acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int
170 * Depth-first recursive case for finding the bus, given the slot/function.
173 acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
176 ACPI_OBJECT_TYPE type;
178 int bus, slot, func, class, subclass, header;
180 /* Try to get the _BBN object of the root, otherwise assume it is 0 */
183 if (ACPI_FAILURE(acpi_EvaluateInteger(root, "_BBN", &bus)) &&
185 printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
188 if (ACPI_FAILURE(AcpiGetParent(curr, &parent)))
191 /* First, recurse up the tree until we find the host bus */
192 bus = acpi_bus_number(root, parent, PciId);
194 /* Validate parent bus device type */
195 if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
196 printf("acpi_bus_number: not a device, type %d\n", type);
199 /* Get the parent's slot and function */
200 if (ACPI_FAILURE(acpi_EvaluateInteger(parent, "_ADR", &adr))) {
201 printf("acpi_bus_number: can't get _ADR\n");
204 slot = ACPI_HIWORD(adr);
205 func = ACPI_LOWORD(adr);
207 /* Is this a PCI-PCI or Cardbus-PCI bridge? */
208 class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
209 if (class != PCIC_BRIDGE)
211 subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
212 /* Find the header type, masking off the multifunction bit */
213 header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE;
214 if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI)
215 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
216 if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS)
217 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
222 * Find the bus number for a device
224 * rhandle: handle for the root bus
225 * chandle: handle for the device
226 * PciId: pointer to device slot and function, we fill out bus
237 if (pci_cfgregopen() == 0)
238 panic("AcpiOsDerivePciId unable to initialize pci bus");
240 /* Try to read _BBN for bus number if we're at the root */
242 if (rhandle == chandle) {
243 if (ACPI_FAILURE(acpi_EvaluateInteger(rhandle, "_BBN", &bus)) &&
245 printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
248 * Get the parent handle and call the recursive case. It is not
249 * clear why we seem to be getting a chandle that points to a child
250 * of the desired slot/function but passing in the parent handle
253 if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent)))
254 bus = acpi_bus_number(rhandle, parent, *PciId);
257 printf("AcpiOsDerivePciId: bus %d dev %d func %d\n",
258 (*PciId)->Bus, (*PciId)->Device, (*PciId)->Function);