1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* arch/arm/kernel/bios32.c: PCI functions for ARM
*
* Copyright (C) 1998 Russell King
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
int pcibios_present(void)
{
return 1;
}
static unsigned long pcibios_base_address(unsigned char dev_fn)
{
int slot = PCI_SLOT(dev_fn);
if (slot < 4)
return 0xf8000000 + (1 << (19 - slot));
else
return 0;
}
int pcibios_read_config_byte(unsigned char bus, unsigned char dev_fn,
unsigned char where, unsigned char *val)
{
unsigned long addr = pcibios_base_address(dev_fn);
unsigned char v;
if (addr) {
__asm__("ldr%?b %0, [%1, %2]"
: "=r" (v)
: "r" (addr), "r" (where));
*val = v;
} else
*val = 0xff;
return PCIBIOS_SUCCESSFUL;
}
int pcibios_read_config_word(unsigned char bus, unsigned char dev_fn,
unsigned char where, unsigned short *val)
{
unsigned long addr = pcibios_base_address(dev_fn);
unsigned short v;
if (addr) {
__asm__("ldrh%? %0, [%1, %2]"
: "=r" (v)
: "r" (addr), "r" (where));
*val = v;
} else
*val = 0xffff;
return PCIBIOS_SUCCESSFUL;
}
int pcibios_read_config_dword(unsigned char bus, unsigned char dev_fn,
unsigned char where, unsigned int *val)
{
unsigned long addr = pcibios_base_address(dev_fn);
unsigned int v;
if (addr) {
__asm__("ldr%? %0, [%1, %2]"
: "=r" (v)
: "r" (addr), "r" (where));
*val = v;
} else
*val = 0xffffffff;
return PCIBIOS_SUCCESSFUL;
}
int pcibios_write_config_byte(unsigned char bus, unsigned char dev_fn,
unsigned char where, unsigned char val)
{
unsigned long addr = pcibios_base_address(dev_fn);
if (addr)
__asm__("str%?b %0, [%1, %2]"
: : "r" (val), "r" (addr), "r" (where));
return PCIBIOS_SUCCESSFUL;
}
int pcibios_write_config_word(unsigned char bus, unsigned char dev_fn,
unsigned char where, unsigned short val)
{
unsigned long addr = pcibios_base_address(dev_fn);
if (addr)
__asm__("strh%? %0, [%1, %2]"
: : "r" (val), "r" (addr), "r" (where));
return PCIBIOS_SUCCESSFUL;
}
int pcibios_write_config_dword(unsigned char bus, unsigned char dev_fn,
unsigned char where, unsigned int val)
{
unsigned long addr = pcibios_base_address(dev_fn);
if (addr)
__asm__("str%? %0, [%1, %2]"
: : "r" (val), "r" (addr), "r" (where));
return PCIBIOS_SUCCESSFUL;
}
static int irq[] = { 18, 8, 9, 11 };
__initfunc(void pcibios_fixup(void))
{
struct pci_dev *dev;
unsigned char pin;
for (dev = pci_devices; dev; dev = dev->next) {
pcibios_read_config_byte(dev->bus->number,
dev->devfn,
PCI_INTERRUPT_PIN,
&pin);
dev->irq = irq[(PCI_SLOT(dev->devfn) + pin) & 3];
pcibios_write_config_byte(dev->bus->number,
dev->devfn,
PCI_INTERRUPT_LINE,
dev->irq);
printk("PCI: %02x:%02x [%04x/%04x] pin %d irq %d\n",
dev->bus->number, dev->devfn,
dev->vendor, dev->device,
pin, dev->irq);
}
}
__initfunc(void pcibios_init(void))
{
int rev;
rev = *(unsigned char *)0xfe000008;
printk("DEC21285 PCI revision %02X\n", rev);
}
__initfunc(char *pcibios_setup(char *str))
{
return str;
}
|
