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 1.13 2004/04/14 03:39:08 njl Exp $
28 * $DragonFly: src/sys/dev/acpica5/Osd/OsdHardware.c,v 1.3 2006/10/25 20:55:52 dillon Exp $
32 * 6.7 : Hardware Abstraction
38 #include <machine/pci_cfgreg.h>
39 #include <bus/pci/pcireg.h>
42 * ACPICA's rather gung-ho approach to hardware resource ownership is a little
43 * troublesome insofar as there is no easy way for us to know in advance
44 * exactly which I/O resources it's going to want to use.
46 * In order to deal with this, we ignore resource ownership entirely, and simply
47 * use the native I/O space accessor functionality. This is Evil, but it works.
49 * XXX use an intermediate #define for the tag/handle
53 #define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO
54 #define ACPI_BUS_HANDLE 0
57 #define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO
58 #define ACPI_BUS_HANDLE 0
61 #define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO
62 #define ACPI_BUS_HANDLE 0
66 AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width)
70 *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO,
71 ACPI_BUS_HANDLE, InPort);
74 *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO,
75 ACPI_BUS_HANDLE, InPort);
78 *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO,
79 ACPI_BUS_HANDLE, InPort);
82 /* debug trap goes here */
90 AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width)
94 bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
97 bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
100 bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
103 /* debug trap goes here */
111 AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
114 u_int32_t byte_width = Width / 8;
117 if (!pci_cfgregopen())
118 return (AE_NOT_EXIST);
120 val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register,
124 *(u_int8_t *)Value = val & 0xff;
127 *(u_int16_t *)Value = val & 0xffff;
130 *(u_int32_t *)Value = val;
133 /* debug trap goes here */
142 AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register,
143 ACPI_INTEGER Value, UINT32 Width)
145 u_int32_t byte_width = Width / 8;
147 if (!pci_cfgregopen())
148 return (AE_NOT_EXIST);
150 pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register,
156 /* XXX should use acpivar.h but too many include dependencies */
157 extern ACPI_STATUS acpi_GetInteger(ACPI_HANDLE handle, char *path, int
161 * Depth-first recursive case for finding the bus, given the slot/function.
164 acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
168 ACPI_OBJECT_TYPE type;
170 int bus, slot, func, class, subclass, header;
172 /* Try to get the _BBN object of the root, otherwise assume it is 0. */
175 status = acpi_GetInteger(root, "_BBN", &bus);
176 if (ACPI_FAILURE(status) && bootverbose)
177 printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
180 status = AcpiGetParent(curr, &parent);
181 if (ACPI_FAILURE(status))
184 /* First, recurse up the tree until we find the host bus. */
185 bus = acpi_bus_number(root, parent, PciId);
187 /* Validate parent bus device type. */
188 if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
189 printf("acpi_bus_number: not a device, type %d\n", type);
193 /* Get the parent's slot and function. */
194 status = acpi_GetInteger(parent, "_ADR", &adr);
195 if (ACPI_FAILURE(status)) {
196 printf("acpi_bus_number: can't get _ADR\n");
199 slot = ACPI_HIWORD(adr);
200 func = ACPI_LOWORD(adr);
202 /* Is this a PCI-PCI or Cardbus-PCI bridge? */
203 class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
204 if (class != PCIC_BRIDGE)
206 subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
208 /* Find the header type, masking off the multifunction bit. */
209 header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE;
210 if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI)
211 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
212 if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS)
213 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
218 * Find the bus number for a device
220 * rhandle: handle for the root bus
221 * chandle: handle for the device
222 * PciId: pointer to device slot and function, we fill out bus
225 AcpiOsDerivePciId(ACPI_HANDLE rhandle, ACPI_HANDLE chandle, ACPI_PCI_ID **PciId)
231 if (pci_cfgregopen() == 0)
232 panic("AcpiOsDerivePciId unable to initialize pci bus");
234 /* Try to read _BBN for bus number if we're at the root */
236 if (rhandle == chandle) {
237 status = acpi_GetInteger(rhandle, "_BBN", &bus);
238 if (ACPI_FAILURE(status) && bootverbose)
239 printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
243 * Get the parent handle and call the recursive case. It is not
244 * clear why we seem to be getting a chandle that points to a child
245 * of the desired slot/function but passing in the parent handle
248 if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent)))
249 bus = acpi_bus_number(rhandle, parent, *PciId);
252 printf("AcpiOsDerivePciId: bus %d dev %d func %d\n",
253 (*PciId)->Bus, (*PciId)->Device, (*PciId)->Function);