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Commit | Line | Data |
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8f60774a | 1 | #include <linux/kernel.h> |
0637a70a | 2 | #include <linux/pci.h> |
8f60774a AK |
3 | #include <asm/pci-direct.h> |
4 | #include <asm/io.h> | |
82487711 | 5 | #include <asm/pci_x86.h> |
8f60774a AK |
6 | |
7 | /* Direct PCI access. This is used for PCI accesses in early boot before | |
8 | the PCI subsystem works. */ | |
9 | ||
8f60774a AK |
10 | u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset) |
11 | { | |
12 | u32 v; | |
13 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); | |
14 | v = inl(0xcfc); | |
8f60774a AK |
15 | return v; |
16 | } | |
17 | ||
18 | u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset) | |
19 | { | |
20 | u8 v; | |
21 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); | |
22 | v = inb(0xcfc + (offset&3)); | |
8f60774a AK |
23 | return v; |
24 | } | |
25 | ||
26 | u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset) | |
27 | { | |
28 | u16 v; | |
29 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); | |
30 | v = inw(0xcfc + (offset&2)); | |
8f60774a AK |
31 | return v; |
32 | } | |
33 | ||
34 | void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, | |
35 | u32 val) | |
36 | { | |
8f60774a AK |
37 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); |
38 | outl(val, 0xcfc); | |
39 | } | |
0637a70a | 40 | |
274e1bbd SS |
41 | void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val) |
42 | { | |
274e1bbd | 43 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); |
e7891c73 YL |
44 | outb(val, 0xcfc + (offset&3)); |
45 | } | |
46 | ||
47 | void write_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset, u16 val) | |
48 | { | |
e7891c73 YL |
49 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); |
50 | outw(val, 0xcfc + (offset&2)); | |
274e1bbd SS |
51 | } |
52 | ||
0637a70a AK |
53 | int early_pci_allowed(void) |
54 | { | |
55 | return (pci_probe & (PCI_PROBE_CONF1|PCI_PROBE_NOEARLY)) == | |
56 | PCI_PROBE_CONF1; | |
57 | } | |
e3f2baeb YL |
58 | |
59 | void early_dump_pci_device(u8 bus, u8 slot, u8 func) | |
60 | { | |
61 | int i; | |
62 | int j; | |
63 | u32 val; | |
64 | ||
7bc9e77d BH |
65 | printk(KERN_INFO "pci 0000:%02x:%02x.%d config space:", |
66 | bus, slot, func); | |
e3f2baeb YL |
67 | |
68 | for (i = 0; i < 256; i += 4) { | |
69 | if (!(i & 0x0f)) | |
7bc9e77d | 70 | printk("\n %02x:",i); |
e3f2baeb YL |
71 | |
72 | val = read_pci_config(bus, slot, func, i); | |
73 | for (j = 0; j < 4; j++) { | |
74 | printk(" %02x", val & 0xff); | |
75 | val >>= 8; | |
76 | } | |
77 | } | |
78 | printk("\n"); | |
79 | } | |
80 | ||
81 | void early_dump_pci_devices(void) | |
82 | { | |
83 | unsigned bus, slot, func; | |
84 | ||
85 | if (!early_pci_allowed()) | |
86 | return; | |
87 | ||
88 | for (bus = 0; bus < 256; bus++) { | |
89 | for (slot = 0; slot < 32; slot++) { | |
90 | for (func = 0; func < 8; func++) { | |
91 | u32 class; | |
92 | u8 type; | |
600914ba | 93 | |
e3f2baeb YL |
94 | class = read_pci_config(bus, slot, func, |
95 | PCI_CLASS_REVISION); | |
96 | if (class == 0xffffffff) | |
600914ba | 97 | continue; |
e3f2baeb YL |
98 | |
99 | early_dump_pci_device(bus, slot, func); | |
100 | ||
600914ba BH |
101 | if (func == 0) { |
102 | type = read_pci_config_byte(bus, slot, | |
103 | func, | |
e3f2baeb | 104 | PCI_HEADER_TYPE); |
600914ba BH |
105 | if (!(type & 0x80)) |
106 | break; | |
107 | } | |
e3f2baeb YL |
108 | } |
109 | } | |
110 | } | |
111 | } |