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
|
/* $Id: ranges.c,v 1.3 1997/03/21 12:33:36 jj Exp $
* ranges.c: Handle ranges in newer proms for obio/sbus.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#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. */
inline 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;
}
}
inline 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 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);
}
}
}
__initfunc(void prom_ranges_init(void))
{
}
__initfunc(void prom_sbus_ranges_init(int iommund, struct linux_sbus *sbus))
{
int success;
sbus->num_sbus_ranges = 0;
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));
}
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);
}
}
|
