1 /* $NetBSD: pci_machdep.c,v 1.6 2018/03/01 23:01:19 scole Exp $ */
2 /*
3 * Copyright (c) 2009, 2010 KIYOHARA Takashi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.6 2018/03/01 23:01:19 scole Exp $");
29
30 #include <machine/bus.h>
31 #include <machine/sal.h>
32
33 #include <dev/pci/pcivar.h>
34 #include <dev/pci/pcireg.h>
35 #include <dev/pci/pcidevs.h>
36
37
38 void
pci_attach_hook(device_t parent,device_t self,struct pcibus_attach_args * pba)39 pci_attach_hook(device_t parent, device_t self, struct pcibus_attach_args *pba)
40 {
41
42 /* Nothing */
43 }
44
45 int
pci_bus_maxdevs(pci_chipset_tag_t pc,int busno)46 pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
47 {
48
49 return 32; /* 32 device/bus */
50 }
51
52 pcitag_t
pci_make_tag(pci_chipset_tag_t pc,int bus,int device,int function)53 pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function)
54 {
55
56 #if DIAGNOSTIC
57 if (bus >= 256 || device >= 32 || function >= 8)
58 panic("%s: bad request", __func__);
59 #endif
60
61 return (bus << 16) | (device << 11) | (function << 8);
62 }
63
64 void
pci_decompose_tag(pci_chipset_tag_t pc,pcitag_t tag,int * bp,int * dp,int * fp)65 pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp, int *fp)
66 {
67
68 if (bp != NULL)
69 *bp = (tag >> 16) & 0xff;
70 if (dp != NULL)
71 *dp = (tag >> 11) & 0x1f;
72 if (fp != NULL)
73 *fp = (tag >> 8) & 0x07;
74 }
75
76 pcireg_t
pci_conf_read(pci_chipset_tag_t pc,pcitag_t tag,int reg)77 pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
78 {
79 struct ia64_sal_result res;
80
81 if ((unsigned int)reg >= PCI_CONF_SIZE)
82 return -1;
83
84 res = ia64_sal_entry(SAL_PCI_CONFIG_READ,
85 tag | reg, sizeof(pcireg_t), 0, 0, 0, 0, 0);
86 if (res.sal_status < 0)
87 return -1;
88 else
89 return res.sal_result[0];
90 }
91
92 void
pci_conf_write(pci_chipset_tag_t pc,pcitag_t tag,int reg,pcireg_t val)93 pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val)
94 {
95 struct ia64_sal_result res;
96
97 if ((unsigned int)reg >= PCI_CONF_SIZE)
98 return;
99
100 res = ia64_sal_entry(SAL_PCI_CONFIG_WRITE,
101 tag | reg, sizeof(pcireg_t), val, 0, 0, 0, 0);
102 if (res.sal_status < 0)
103 printf("pci configuration write failed\n");
104 }
105