1 // SPDX-License-Identifier: GPL-2.0 1
2 /*
3 * ranges.c: Handle ranges in newer proms for
4 *
5 * Copyright (C) 1995 David S. Miller (davem@c
6 * Copyright (C) 1997 Jakub Jelinek (jj@sunsit
7 */
8
9 #include <linux/init.h>
10 #include <linux/module.h>
11
12 #include <asm/openprom.h>
13 #include <asm/oplib.h>
14 #include <asm/types.h>
15
16 static struct linux_prom_ranges promlib_obio_r
17 static int num_obio_ranges;
18
19 /* Adjust register values based upon the range
20 static void prom_adjust_regs(struct linux_prom
21 struct linux_prom
22 {
23 int regc, rngc;
24
25 for (regc = 0; regc < nregs; regc++) {
26 for (rngc = 0; rngc < nranges;
27 if (regp[regc].which_i
28 break; /* Foun
29 if (rngc == nranges) /* oops *
30 prom_printf("adjust_re
31 regp[regc].which_io = rangep[r
32 regp[regc].phys_addr -= rangep
33 regp[regc].phys_addr += rangep
34 }
35 }
36
37 static void prom_adjust_ranges(struct linux_pr
38 struct linux_pr
39 {
40 int rng1c, rng2c;
41
42 for (rng1c = 0; rng1c < nranges1; rng1
43 for (rng2c = 0; rng2c < nrange
44 if (ranges1[rng1c].ot_
45 ranges1[rng1c].ot_p
46 ranges2[rng2c].ot_c
47 break;
48 if (rng2c == nranges2) /* oops
49 prom_printf("adjust_ra
50 else if (ranges1[rng1c].ot_par
51 ranges1[rng1c].or_size
52 ranges1[rng1c].ot_parent_space
53 ranges1[rng1c].ot_parent_base
54 }
55 }
56
57 /* Apply probed obio ranges to registers passe
58 void prom_apply_obio_ranges(struct linux_prom_
59 {
60 if (num_obio_ranges)
61 prom_adjust_regs(regs, nregs,
62 }
63 EXPORT_SYMBOL(prom_apply_obio_ranges);
64
65 void __init prom_ranges_init(void)
66 {
67 phandle node, obio_node;
68 int success;
69
70 num_obio_ranges = 0;
71
72 /* Check for obio and sbus ranges. */
73 node = prom_getchild(prom_root_node);
74 obio_node = prom_searchsiblings(node,
75
76 if (obio_node) {
77 success = prom_getproperty(obi
78 (ch
79 siz
80 if (success != -1)
81 num_obio_ranges = (suc
82 }
83
84 if (num_obio_ranges)
85 prom_printf("PROMLIB: obio_ran
86 }
87
88 void prom_apply_generic_ranges(phandle node, p
89 struct linux_pr
90 {
91 int success;
92 int num_ranges;
93 struct linux_prom_ranges ranges[PROMRE
94
95 success = prom_getproperty(node, "rang
96 (char *) ra
97 sizeof(rang
98 if (success != -1) {
99 num_ranges = (success / sizeof
100 if (parent) {
101 struct linux_prom_rang
102 int num_parent_ranges;
103
104 success = prom_getprop
105
106
107 if (success != -1) {
108 num_parent_ran
109 prom_adjust_ra
110 }
111 }
112 prom_adjust_regs(regs, nregs,
113 }
114 }
115
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.