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
145
146
147
148
149
150
151
152
153
154
|
/* $Id: ranges.c,v 1.8 1997/02/04 07:28:29 davem Exp $
* ranges.c: Handle ranges in newer proms for obio/sbus.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#include <linux/init.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/sbus.h>
#include <asm/system.h>
struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX];
int num_obio_ranges;
/* Adjust register values based upon the ranges parameters. */
void
prom_adjust_regs(struct linux_prom_registers *regp, int nregs,
struct linux_prom_ranges *rangep, int nranges)
{
int regc, rngc;
for(regc=0; regc < nregs; regc++) {
for(rngc=0; rngc < nranges; rngc++)
if(regp[regc].which_io == rangep[rngc].ot_child_space)
break; /* Fount it */
if(rngc==nranges) /* oops */
prom_printf("adjust_regs: Could not find range with matching bus type...\n");
regp[regc].which_io = rangep[rngc].ot_parent_space;
regp[regc].phys_addr += rangep[rngc].ot_parent_base;
}
}
void
prom_adjust_ranges(struct linux_prom_ranges *ranges1, int nranges1,
struct linux_prom_ranges *ranges2, int nranges2)
{
int rng1c, rng2c;
for(rng1c=0; rng1c < nranges1; rng1c++) {
for(rng2c=0; rng2c < nranges2; rng2c++)
if(ranges1[rng1c].ot_child_space ==
ranges2[rng2c].ot_child_space) break;
if(rng2c == nranges2) /* oops */
prom_printf("adjust_ranges: Could not find matching bus type...\n");
ranges1[rng1c].ot_parent_space = ranges2[rng2c].ot_parent_space;
ranges1[rng1c].ot_parent_base += ranges2[rng2c].ot_parent_base;
}
}
/* Apply probed obio ranges to registers passed, if no ranges return. */
void
prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs)
{
if(num_obio_ranges)
prom_adjust_regs(regs, nregs, promlib_obio_ranges, num_obio_ranges);
}
/* Apply probed sbus ranges to registers passed, if no ranges return. */
void prom_apply_sbus_ranges(struct linux_sbus *sbus, struct linux_prom_registers *regs,
int nregs, struct linux_sbus_device *sdev)
{
if(sbus->num_sbus_ranges) {
if(sdev && (sdev->ranges_applied == 0)) {
sdev->ranges_applied = 1;
prom_adjust_regs(regs, nregs, sbus->sbus_ranges,
sbus->num_sbus_ranges);
} else if(!sdev) {
printk("PROMLIB: Aieee, old SBUS driver, update it to use new "
"prom_apply_sbus_ranges interface now!\n");
prom_adjust_regs(regs, nregs, sbus->sbus_ranges,
sbus->num_sbus_ranges);
}
}
}
__initfunc(void prom_ranges_init(void))
{
int node, obio_node;
int success;
num_obio_ranges = 0;
/* Check for obio and sbus ranges. */
node = prom_getchild(prom_root_node);
obio_node = prom_searchsiblings(node, "obio");
if(obio_node) {
success = prom_getproperty(obio_node, "ranges",
(char *) promlib_obio_ranges,
sizeof(promlib_obio_ranges));
if(success != -1)
num_obio_ranges = (success/sizeof(struct linux_prom_ranges));
}
if(num_obio_ranges)
prom_printf("PROMLIB: obio_ranges %d\n", num_obio_ranges);
return;
}
__initfunc(void prom_sbus_ranges_init(int parentnd, struct linux_sbus *sbus))
{
int success;
sbus->num_sbus_ranges = 0;
if(sparc_cpu_model == sun4c)
return;
success = prom_getproperty(sbus->prom_node, "ranges",
(char *) sbus->sbus_ranges,
sizeof (sbus->sbus_ranges));
if (success != -1)
sbus->num_sbus_ranges = (success/sizeof(struct linux_prom_ranges));
if (sparc_cpu_model == sun4d) {
struct linux_prom_ranges iounit_ranges[PROMREG_MAX];
int num_iounit_ranges;
success = prom_getproperty(parentnd, "ranges",
(char *) iounit_ranges,
sizeof (iounit_ranges));
if (success != -1) {
num_iounit_ranges = (success/sizeof(struct linux_prom_ranges));
prom_adjust_ranges (sbus->sbus_ranges, sbus->num_sbus_ranges, iounit_ranges, num_iounit_ranges);
}
}
}
void
prom_apply_generic_ranges (int node, int parent, struct linux_prom_registers *regs, int nregs)
{
int success;
int num_ranges;
struct linux_prom_ranges ranges[PROMREG_MAX];
success = prom_getproperty(node, "ranges",
(char *) ranges,
sizeof (ranges));
if (success != -1) {
num_ranges = (success/sizeof(struct linux_prom_ranges));
if (parent) {
struct linux_prom_ranges parent_ranges[PROMREG_MAX];
int num_parent_ranges;
success = prom_getproperty(parent, "ranges",
(char *) parent_ranges,
sizeof (parent_ranges));
if (success != -1) {
num_parent_ranges = (success/sizeof(struct linux_prom_ranges));
prom_adjust_ranges (ranges, num_ranges, parent_ranges, num_parent_ranges);
}
}
prom_adjust_regs(regs, nregs, ranges, num_ranges);
}
}
|
