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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * arch/sh/kernel/machvec.c
4 *
5 * The SuperH machine vector setup handlers, yanked from setup.c
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
19#define MV_NAME_SIZE 32
20
21#define for_each_mv(mv) \
22 for ((mv) = (struct sh_machine_vector *)&__machvec_start; \
23 (mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \
24 (mv)++)
25
26static struct sh_machine_vector * __init get_mv_byname(const char *name)
27{
28 struct sh_machine_vector *mv;
29
30 for_each_mv(mv)
31 if (strcasecmp(name, mv->mv_name) == 0)
32 return mv;
33
34 return NULL;
35}
36
37static unsigned int __initdata machvec_selected;
38
39static int __init early_parse_mv(char *from)
40{
41 char mv_name[MV_NAME_SIZE] = "";
42 char *mv_end;
43 char *mv_comma;
44 int mv_len;
45 struct sh_machine_vector *mvp;
46
47 mv_end = strchr(from, ' ');
48 if (mv_end == NULL)
49 mv_end = from + strlen(from);
50
51 mv_comma = strchr(from, ',');
52 mv_len = mv_end - from;
53 if (mv_len > (MV_NAME_SIZE-1))
54 mv_len = MV_NAME_SIZE-1;
55 memcpy(mv_name, from, mv_len);
56 mv_name[mv_len] = '\0';
57 from = mv_end;
58
59 machvec_selected = 1;
60
61 /* Boot with the generic vector */
62 if (strcmp(mv_name, "generic") == 0)
63 return 0;
64
65 mvp = get_mv_byname(mv_name);
66 if (unlikely(!mvp)) {
67 printk("Available vectors:\n\n\t'%s', ", sh_mv.mv_name);
68 for_each_mv(mvp)
69 printk("'%s', ", mvp->mv_name);
70 printk("\n\n");
71 panic("Failed to select machvec '%s' -- halting.\n",
72 mv_name);
73 } else
74 sh_mv = *mvp;
75
76 return 0;
77}
78early_param("sh_mv", early_parse_mv);
79
80void __init sh_mv_setup(void)
81{
82 /*
83 * Only overload the machvec if one hasn't been selected on
84 * the command line with sh_mv=
85 */
86 if (!machvec_selected) {
87 unsigned long machvec_size;
88
89 machvec_size = ((unsigned long)&__machvec_end -
90 (unsigned long)&__machvec_start);
91
92 /*
93 * Sanity check for machvec section alignment. Ensure
94 * __initmv hasn't been misused.
95 */
96 if (machvec_size % sizeof(struct sh_machine_vector))
97 panic("machvec misaligned, invalid __initmv use?");
98
99 /*
100 * If the machvec hasn't been preselected, use the first
101 * vector (usually the only one) from .machvec.init.
102 */
103 if (machvec_size >= sizeof(struct sh_machine_vector))
104 sh_mv = *(struct sh_machine_vector *)&__machvec_start;
105 }
106
107 printk(KERN_NOTICE "Booting machvec: %s\n", get_system_type());
108
109 /*
110 * Manually walk the vec, fill in anything that the board hasn't yet
111 * by hand, wrapping to the generic implementation.
112 */
113#define mv_set(elem) do { \
114 if (!sh_mv.mv_##elem) \
115 sh_mv.mv_##elem = generic_##elem; \
116} while (0)
117
118 mv_set(irq_demux);
119 mv_set(mode_pins);
120 mv_set(mem_init);
121}
1/*
2 * arch/sh/kernel/machvec.c
3 *
4 * The SuperH machine vector setup handlers, yanked from setup.c
5 *
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 - 2007 Paul Mundt
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file "COPYING" in the main directory of this archive
11 * for more details.
12 */
13#include <linux/init.h>
14#include <linux/string.h>
15#include <asm/machvec.h>
16#include <asm/sections.h>
17#include <asm/addrspace.h>
18#include <asm/setup.h>
19#include <asm/io.h>
20#include <asm/irq.h>
21
22#define MV_NAME_SIZE 32
23
24#define for_each_mv(mv) \
25 for ((mv) = (struct sh_machine_vector *)&__machvec_start; \
26 (mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \
27 (mv)++)
28
29static struct sh_machine_vector * __init get_mv_byname(const char *name)
30{
31 struct sh_machine_vector *mv;
32
33 for_each_mv(mv)
34 if (strcasecmp(name, mv->mv_name) == 0)
35 return mv;
36
37 return NULL;
38}
39
40static unsigned int __initdata machvec_selected;
41
42static int __init early_parse_mv(char *from)
43{
44 char mv_name[MV_NAME_SIZE] = "";
45 char *mv_end;
46 char *mv_comma;
47 int mv_len;
48 struct sh_machine_vector *mvp;
49
50 mv_end = strchr(from, ' ');
51 if (mv_end == NULL)
52 mv_end = from + strlen(from);
53
54 mv_comma = strchr(from, ',');
55 mv_len = mv_end - from;
56 if (mv_len > (MV_NAME_SIZE-1))
57 mv_len = MV_NAME_SIZE-1;
58 memcpy(mv_name, from, mv_len);
59 mv_name[mv_len] = '\0';
60 from = mv_end;
61
62 machvec_selected = 1;
63
64 /* Boot with the generic vector */
65 if (strcmp(mv_name, "generic") == 0)
66 return 0;
67
68 mvp = get_mv_byname(mv_name);
69 if (unlikely(!mvp)) {
70 printk("Available vectors:\n\n\t'%s', ", sh_mv.mv_name);
71 for_each_mv(mvp)
72 printk("'%s', ", mvp->mv_name);
73 printk("\n\n");
74 panic("Failed to select machvec '%s' -- halting.\n",
75 mv_name);
76 } else
77 sh_mv = *mvp;
78
79 return 0;
80}
81early_param("sh_mv", early_parse_mv);
82
83void __init sh_mv_setup(void)
84{
85 /*
86 * Only overload the machvec if one hasn't been selected on
87 * the command line with sh_mv=
88 */
89 if (!machvec_selected) {
90 unsigned long machvec_size;
91
92 machvec_size = ((unsigned long)&__machvec_end -
93 (unsigned long)&__machvec_start);
94
95 /*
96 * Sanity check for machvec section alignment. Ensure
97 * __initmv hasn't been misused.
98 */
99 if (machvec_size % sizeof(struct sh_machine_vector))
100 panic("machvec misaligned, invalid __initmv use?");
101
102 /*
103 * If the machvec hasn't been preselected, use the first
104 * vector (usually the only one) from .machvec.init.
105 */
106 if (machvec_size >= sizeof(struct sh_machine_vector))
107 sh_mv = *(struct sh_machine_vector *)&__machvec_start;
108 }
109
110 printk(KERN_NOTICE "Booting machvec: %s\n", get_system_type());
111
112 /*
113 * Manually walk the vec, fill in anything that the board hasn't yet
114 * by hand, wrapping to the generic implementation.
115 */
116#define mv_set(elem) do { \
117 if (!sh_mv.mv_##elem) \
118 sh_mv.mv_##elem = generic_##elem; \
119} while (0)
120
121 mv_set(irq_demux);
122 mv_set(mode_pins);
123 mv_set(mem_init);
124}