1 /* $OpenBSD: acpimcfg.c,v 1.5 2022/04/06 18:59:27 naddy Exp $ */
2 /*
3 * Copyright (c) 2010 Mark Kettenis <kettenis@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/param.h>
19 #include <sys/systm.h>
20 #include <sys/device.h>
21
22 #include <dev/acpi/acpireg.h>
23 #include <dev/acpi/acpivar.h>
24 #include <dev/pci/pcivar.h>
25
26 int acpimcfg_match(struct device *, void *, void *);
27 void acpimcfg_attach(struct device *, struct device *, void *);
28
29 const struct cfattach acpimcfg_ca = {
30 sizeof(struct device), acpimcfg_match, acpimcfg_attach
31 };
32
33 struct cfdriver acpimcfg_cd = {
34 NULL, "acpimcfg", DV_DULL
35 };
36
37 int
acpimcfg_match(struct device * parent,void * match,void * aux)38 acpimcfg_match(struct device *parent, void *match, void *aux)
39 {
40 struct acpi_attach_args *aaa = aux;
41 struct acpi_table_header *hdr;
42
43 /*
44 * If we do not have a table, it is not us
45 */
46 if (aaa->aaa_table == NULL)
47 return (0);
48
49 /*
50 * If it is an MCFG table, we can attach
51 */
52 hdr = (struct acpi_table_header *)aaa->aaa_table;
53 if (memcmp(hdr->signature, MCFG_SIG, sizeof(MCFG_SIG) - 1) != 0)
54 return (0);
55
56 return (1);
57 }
58
59 void
acpimcfg_attach(struct device * parent,struct device * self,void * aux)60 acpimcfg_attach(struct device *parent, struct device *self, void *aux)
61 {
62 struct acpi_attach_args *aaa = aux;
63 struct acpi_mcfg *mcfg = (struct acpi_mcfg *)aaa->aaa_table;
64 caddr_t addr = (caddr_t)(mcfg + 1);
65
66 printf("\n");
67
68 while (addr < (caddr_t)mcfg + mcfg->hdr.length) {
69 struct acpi_mcfg_entry *entry = (struct acpi_mcfg_entry *)addr;
70
71 printf("%s: addr 0x%llx, bus %d-%d\n", self->dv_xname,
72 entry->base_address, entry->min_bus_number, entry->max_bus_number);
73
74 pci_mcfg_init(aaa->aaa_memt, entry->base_address,
75 entry->segment, entry->min_bus_number, entry->max_bus_number);
76 addr += sizeof(struct acpi_mcfg_entry);
77 }
78 }
79