1*6d3ceb1dSskrll /* $NetBSD: sti_pci_machdep.c,v 1.1 2014/02/24 07:23:43 skrll Exp $ */
2*6d3ceb1dSskrll
3*6d3ceb1dSskrll /* $OpenBSD: sti_pci_machdep.c,v 1.2 2009/04/10 17:11:27 miod Exp $ */
4*6d3ceb1dSskrll
5*6d3ceb1dSskrll /*
6*6d3ceb1dSskrll * Copyright (c) 2007, 2009 Miodrag Vallat.
7*6d3ceb1dSskrll *
8*6d3ceb1dSskrll * Permission to use, copy, modify, and distribute this software for any
9*6d3ceb1dSskrll * purpose with or without fee is hereby granted, provided that the above
10*6d3ceb1dSskrll * copyright notice, this permission notice, and the disclaimer below
11*6d3ceb1dSskrll * appear in all copies.
12*6d3ceb1dSskrll *
13*6d3ceb1dSskrll * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14*6d3ceb1dSskrll * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15*6d3ceb1dSskrll * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16*6d3ceb1dSskrll * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17*6d3ceb1dSskrll * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18*6d3ceb1dSskrll * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19*6d3ceb1dSskrll * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20*6d3ceb1dSskrll */
21*6d3ceb1dSskrll
22*6d3ceb1dSskrll #include <sys/param.h>
23*6d3ceb1dSskrll #include <sys/systm.h>
24*6d3ceb1dSskrll #include <sys/device.h>
25*6d3ceb1dSskrll
26*6d3ceb1dSskrll #include <machine/iomod.h>
27*6d3ceb1dSskrll #include <machine/autoconf.h>
28*6d3ceb1dSskrll
29*6d3ceb1dSskrll #include <dev/pci/pcivar.h>
30*6d3ceb1dSskrll
31*6d3ceb1dSskrll #include <hppa/hppa/machdep.h>
32*6d3ceb1dSskrll
33*6d3ceb1dSskrll int sti_pci_is_console(struct pci_attach_args *, bus_addr_t *);
34*6d3ceb1dSskrll
35*6d3ceb1dSskrll int
sti_pci_is_console(struct pci_attach_args * paa,bus_addr_t * bases)36*6d3ceb1dSskrll sti_pci_is_console(struct pci_attach_args *paa, bus_addr_t *bases)
37*6d3ceb1dSskrll {
38*6d3ceb1dSskrll hppa_hpa_t consaddr;
39*6d3ceb1dSskrll uint32_t cf;
40*6d3ceb1dSskrll int pagezero_cookie;
41*6d3ceb1dSskrll int bar;
42*6d3ceb1dSskrll int rc;
43*6d3ceb1dSskrll
44*6d3ceb1dSskrll KASSERT(paa != NULL);
45*6d3ceb1dSskrll
46*6d3ceb1dSskrll pagezero_cookie = hppa_pagezero_map();
47*6d3ceb1dSskrll consaddr = (hppa_hpa_t)PAGE0->mem_cons.pz_hpa;
48*6d3ceb1dSskrll hppa_pagezero_unmap(pagezero_cookie);
49*6d3ceb1dSskrll /*
50*6d3ceb1dSskrll * PAGE0 console information will point to one of our BARs,
51*6d3ceb1dSskrll * but depending on the particular sti model, this might not
52*6d3ceb1dSskrll * be the BAR mapping the rom (region #0).
53*6d3ceb1dSskrll *
54*6d3ceb1dSskrll * For example, on Visualize FXe, regions #0, #2 and #3 are
55*6d3ceb1dSskrll * mapped by BAR 0x18, while region #1 is mapped by BAR 0x10,
56*6d3ceb1dSskrll * which matches PAGE0 console address.
57*6d3ceb1dSskrll *
58*6d3ceb1dSskrll * Rather than trying to be smart, reread the region->BAR array
59*6d3ceb1dSskrll * again, and compare the BAR mapping region #1 against PAGE0
60*6d3ceb1dSskrll * values, we simply try all the valid BARs; if any of them
61*6d3ceb1dSskrll * matches what PAGE0 says, then we are the console, and it
62*6d3ceb1dSskrll * doesn't matter which BAR matched.
63*6d3ceb1dSskrll */
64*6d3ceb1dSskrll for (bar = PCI_MAPREG_START; bar <= PCI_MAPREG_PPB_END; ) {
65*6d3ceb1dSskrll bus_addr_t addr;
66*6d3ceb1dSskrll bus_size_t size;
67*6d3ceb1dSskrll
68*6d3ceb1dSskrll cf = pci_conf_read(paa->pa_pc, paa->pa_tag, bar);
69*6d3ceb1dSskrll
70*6d3ceb1dSskrll rc = pci_mapreg_info(paa->pa_pc, paa->pa_tag, bar,
71*6d3ceb1dSskrll PCI_MAPREG_TYPE(cf), &addr, &size, NULL);
72*6d3ceb1dSskrll
73*6d3ceb1dSskrll if (PCI_MAPREG_TYPE(cf) == PCI_MAPREG_TYPE_IO) {
74*6d3ceb1dSskrll bar += 4;
75*6d3ceb1dSskrll } else {
76*6d3ceb1dSskrll if (PCI_MAPREG_MEM_TYPE(cf) ==
77*6d3ceb1dSskrll PCI_MAPREG_MEM_TYPE_64BIT)
78*6d3ceb1dSskrll bar += 8;
79*6d3ceb1dSskrll else
80*6d3ceb1dSskrll bar += 4;
81*6d3ceb1dSskrll }
82*6d3ceb1dSskrll
83*6d3ceb1dSskrll if (rc == 0 && (hppa_hpa_t)addr == consaddr)
84*6d3ceb1dSskrll return 1;
85*6d3ceb1dSskrll }
86*6d3ceb1dSskrll
87*6d3ceb1dSskrll return 0;
88*6d3ceb1dSskrll }
89