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
29 * 6.7 : Hardware Abstraction
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <contrib/dev/acpica/acpi.h>
38 #include <sys/kernel.h>
39 #include <machine/bus.h>
40 #include <machine/pci_cfgreg.h>
41 #include <dev/acpica/acpivar.h>
42 #include <dev/pci/pcireg.h>
45 * ACPICA's rather gung-ho approach to hardware resource ownership is a little
46 * troublesome insofar as there is no easy way for us to know in advance
47 * exactly which I/O resources it's going to want to use.
49 * In order to deal with this, we ignore resource ownership entirely, and simply
50 * use the native I/O space accessor functionality. This is Evil, but it works.
52 * XXX use an intermediate #define for the tag/handle
56 #define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO
57 #define ACPI_BUS_HANDLE 0
60 #define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO
61 #define ACPI_BUS_HANDLE 0
64 #define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO
65 #define ACPI_BUS_HANDLE 0
69 * Some BIOS vendors use AML to read/write directly to IO space. This
70 * can cause a problem if such accesses interfere with the OS's access to
71 * the same ports. Windows XP and newer systems block accesses to certain
72 * IO ports. We print a message or block accesses based on a tunable.
74 static int illegal_bios_ports[] = {
75 0x000, 0x00f, /* DMA controller 1 */
76 0x020, 0x021, /* PIC */
77 0x040, 0x043, /* Timer 1 */
78 0x048, 0x04b, /* Timer 2 failsafe */
79 0x070, 0x071, /* CMOS and RTC */
80 0x074, 0x076, /* Extended CMOS */
81 0x081, 0x083, /* DMA1 page registers */
82 0x087, 0x087, /* DMA1 ch0 low page */
83 0x089, 0x08b, /* DMA2 ch2 (0x89), ch3 low page (0x8a, 0x8b) */
84 0x08f, 0x091, /* DMA2 low page refresh (0x8f) */
85 /* Arb ctrl port, card select feedback (0x90, 0x91) */
86 0x093, 0x094, /* System board setup */
87 0x096, 0x097, /* POS channel select */
88 0x0a0, 0x0a1, /* PIC (cascaded) */
89 0x0c0, 0x0df, /* ISA DMA */
90 0x4d0, 0x4d1, /* PIC ELCR (edge/level control) */
91 0xcf8, 0xcff, /* PCI config space. Microsoft adds 0xd00 also but
92 that seems incorrect. */
96 /* Block accesses to bad IO port addresses or just print a warning. */
97 static int block_bad_io;
98 TUNABLE_INT("debug.acpi.block_bad_io", &block_bad_io);
101 * Look up bad ports in our table. Returns 0 if ok, 1 if marked bad but
102 * access is still allowed, or -1 to deny access.
105 acpi_os_check_port(UINT32 addr, UINT32 width)
110 for (port = illegal_bios_ports; *port != -1; port += 2) {
111 if ((addr >= port[0] && addr <= port[1]) ||
112 (addr < port[0] && addr + (width / 8) > port[0])) {
125 AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width)
129 error = acpi_os_check_port(InPort, Width);
132 printf("acpi: bad read from port 0x%03x (%d)\n",
135 return (AE_BAD_PARAMETER);
140 *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO,
141 ACPI_BUS_HANDLE, InPort);
144 *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO,
145 ACPI_BUS_HANDLE, InPort);
148 *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO,
149 ACPI_BUS_HANDLE, InPort);
152 /* debug trap goes here */
160 AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width)
164 error = acpi_os_check_port(OutPort, Width);
167 printf("acpi: bad write to port 0x%03x (%d), val %#x\n",
168 (int)OutPort, Width, Value);
170 return (AE_BAD_PARAMETER);
175 bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
178 bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
181 bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
184 /* debug trap goes here */
192 AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
195 u_int32_t byte_width = Width / 8;
198 if (!pci_cfgregopen())
199 return (AE_NOT_EXIST);
201 val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register,
205 *(u_int8_t *)Value = val & 0xff;
208 *(u_int16_t *)Value = val & 0xffff;
211 *(u_int32_t *)Value = val;
214 /* debug trap goes here */
223 AcpiOsWritePciConfiguration (ACPI_PCI_ID *PciId, UINT32 Register,
224 ACPI_INTEGER Value, UINT32 Width)
226 u_int32_t byte_width = Width / 8;
228 if (!pci_cfgregopen())
229 return (AE_NOT_EXIST);
231 pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register,
238 * Depth-first recursive case for finding the bus, given the slot/function.
241 acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
245 ACPI_OBJECT_TYPE type;
247 int bus, slot, func, class, subclass, header;
249 /* Try to get the _BBN object of the root, otherwise assume it is 0. */
252 status = acpi_GetInteger(root, "_BBN", &bus);
253 if (ACPI_FAILURE(status) && bootverbose)
254 printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
257 status = AcpiGetParent(curr, &parent);
258 if (ACPI_FAILURE(status))
261 /* First, recurse up the tree until we find the host bus. */
262 bus = acpi_bus_number(root, parent, PciId);
264 /* Validate parent bus device type. */
265 if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
266 printf("acpi_bus_number: not a device, type %d\n", type);
270 /* Get the parent's slot and function. */
271 status = acpi_GetInteger(parent, "_ADR", &adr);
272 if (ACPI_FAILURE(status))
274 slot = ACPI_HIWORD(adr);
275 func = ACPI_LOWORD(adr);
277 /* Is this a PCI-PCI or Cardbus-PCI bridge? */
278 class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
279 if (class != PCIC_BRIDGE)
281 subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
283 /* Find the header type, masking off the multifunction bit. */
284 header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE;
285 if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI)
286 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
287 else if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS)
288 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
293 * Find the bus number for a device
295 * rhandle: handle for the root bus
296 * chandle: handle for the device
297 * PciId: pointer to device slot and function, we fill out bus
300 AcpiOsDerivePciId(ACPI_HANDLE rhandle, ACPI_HANDLE chandle, ACPI_PCI_ID **PciId)
306 if (pci_cfgregopen() == 0)
307 panic("AcpiOsDerivePciId unable to initialize pci bus");
309 /* Try to read _BBN for bus number if we're at the root */
311 if (rhandle == chandle) {
312 status = acpi_GetInteger(rhandle, "_BBN", &bus);
313 if (ACPI_FAILURE(status) && bootverbose)
314 printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
318 * Get the parent handle and call the recursive case. It is not
319 * clear why we seem to be getting a chandle that points to a child
320 * of the desired slot/function but passing in the parent handle
323 if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent)))
324 bus = acpi_bus_number(rhandle, parent, *PciId);
327 printf("AcpiOsDerivePciId: %s -> bus %d dev %d func %d\n",
328 acpi_name(chandle), (*PciId)->Bus, (*PciId)->Device,