1 // SPDX-License-Identifier: GPL-2.0 1
2 /*
3 * arch/sh/kernel/machvec.c
4 *
5 * The SuperH machine vector setup handlers, y
6 *
7 * Copyright (C) 1999 Niibe Yutaka
8 * Copyright (C) 2002 - 2007 Paul Mundt
9 */
10 #include <linux/init.h>
11 #include <linux/string.h>
12 #include <asm/machvec.h>
13 #include <asm/sections.h>
14 #include <asm/addrspace.h>
15 #include <asm/setup.h>
16 #include <asm/io.h>
17 #include <asm/irq.h>
18 #include <asm/processor.h>
19
20 #define MV_NAME_SIZE 32
21
22 #define for_each_mv(mv) \
23 for ((mv) = (struct sh_machine_vector
24 (mv) && (unsigned long)(mv) < (un
25 (mv)++)
26
27 static struct sh_machine_vector * __init get_m
28 {
29 struct sh_machine_vector *mv;
30
31 for_each_mv(mv)
32 if (strcasecmp(name, mv->mv_na
33 return mv;
34
35 return NULL;
36 }
37
38 static unsigned int __initdata machvec_selecte
39
40 static int __init early_parse_mv(char *from)
41 {
42 char mv_name[MV_NAME_SIZE] = "";
43 char *mv_end;
44 char *mv_comma;
45 int mv_len;
46 struct sh_machine_vector *mvp;
47
48 mv_end = strchr(from, ' ');
49 if (mv_end == NULL)
50 mv_end = from + strlen(from);
51
52 mv_comma = strchr(from, ',');
53 mv_len = mv_end - from;
54 if (mv_len > (MV_NAME_SIZE-1))
55 mv_len = MV_NAME_SIZE-1;
56 memcpy(mv_name, from, mv_len);
57 mv_name[mv_len] = '\0';
58 from = mv_end;
59
60 machvec_selected = 1;
61
62 /* Boot with the generic vector */
63 if (strcmp(mv_name, "generic") == 0)
64 return 0;
65
66 mvp = get_mv_byname(mv_name);
67 if (unlikely(!mvp)) {
68 pr_info("Available vectors:\n\
69 for_each_mv(mvp)
70 pr_cont("'%s', ", mvp-
71 pr_cont("\n\n");
72 panic("Failed to select machve
73 mv_name);
74 } else
75 sh_mv = *mvp;
76
77 return 0;
78 }
79 early_param("sh_mv", early_parse_mv);
80
81 void __init sh_mv_setup(void)
82 {
83 /*
84 * Only overload the machvec if one ha
85 * the command line with sh_mv=
86 */
87 if (!machvec_selected) {
88 unsigned long machvec_size;
89
90 machvec_size = ((unsigned long
91 (unsigned long
92
93 /*
94 * Sanity check for machvec se
95 * __initmv hasn't been misuse
96 */
97 if (machvec_size % sizeof(stru
98 panic("machvec misalig
99
100 /*
101 * If the machvec hasn't been
102 * vector (usually the only on
103 */
104 if (machvec_size >= sizeof(str
105 sh_mv = *(struct sh_ma
106 }
107
108 pr_notice("Booting machvec: %s\n", get
109
110 /*
111 * Manually walk the vec, fill in anyt
112 * by hand, wrapping to the generic im
113 */
114 #define mv_set(elem) do { \
115 if (!sh_mv.mv_##elem) \
116 sh_mv.mv_##elem = generic_##el
117 } while (0)
118
119 mv_set(irq_demux);
120 mv_set(mode_pins);
121 mv_set(mem_init);
122 }
123
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