Commit | Line | Data |
---|---|---|
9655ad03 PM |
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> | |
fa43972f | 17 | #include <asm/setup.h> |
9655ad03 PM |
18 | #include <asm/io.h> |
19 | #include <asm/irq.h> | |
20 | ||
21 | #define MV_NAME_SIZE 32 | |
22 | ||
23 | #define for_each_mv(mv) \ | |
24 | for ((mv) = (struct sh_machine_vector *)&__machvec_start; \ | |
25 | (mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \ | |
26 | (mv)++) | |
27 | ||
28 | static struct sh_machine_vector * __init get_mv_byname(const char *name) | |
29 | { | |
30 | struct sh_machine_vector *mv; | |
31 | ||
32 | for_each_mv(mv) | |
82f81f47 | 33 | if (strcasecmp(name, mv->mv_name) == 0) |
9655ad03 PM |
34 | return mv; |
35 | ||
36 | return NULL; | |
37 | } | |
38 | ||
fd8f20e8 PM |
39 | static unsigned int __initdata machvec_selected; |
40 | ||
9655ad03 PM |
41 | static int __init early_parse_mv(char *from) |
42 | { | |
43 | char mv_name[MV_NAME_SIZE] = ""; | |
44 | char *mv_end; | |
45 | char *mv_comma; | |
46 | int mv_len; | |
47 | struct sh_machine_vector *mvp; | |
48 | ||
49 | mv_end = strchr(from, ' '); | |
50 | if (mv_end == NULL) | |
51 | mv_end = from + strlen(from); | |
52 | ||
53 | mv_comma = strchr(from, ','); | |
54 | mv_len = mv_end - from; | |
55 | if (mv_len > (MV_NAME_SIZE-1)) | |
56 | mv_len = MV_NAME_SIZE-1; | |
57 | memcpy(mv_name, from, mv_len); | |
58 | mv_name[mv_len] = '\0'; | |
59 | from = mv_end; | |
60 | ||
fd8f20e8 PM |
61 | machvec_selected = 1; |
62 | ||
63 | /* Boot with the generic vector */ | |
64 | if (strcmp(mv_name, "generic") == 0) | |
65 | return 0; | |
66 | ||
82f81f47 PM |
67 | mvp = get_mv_byname(mv_name); |
68 | if (unlikely(!mvp)) { | |
fd8f20e8 | 69 | printk("Available vectors:\n\n\t'%s', ", sh_mv.mv_name); |
82f81f47 PM |
70 | for_each_mv(mvp) |
71 | printk("'%s', ", mvp->mv_name); | |
72 | printk("\n\n"); | |
73 | panic("Failed to select machvec '%s' -- halting.\n", | |
74 | mv_name); | |
75 | } else | |
76 | sh_mv = *mvp; | |
9655ad03 | 77 | |
9655ad03 PM |
78 | return 0; |
79 | } | |
80 | early_param("sh_mv", early_parse_mv); | |
81 | ||
82 | void __init sh_mv_setup(void) | |
83 | { | |
82f81f47 PM |
84 | /* |
85 | * Only overload the machvec if one hasn't been selected on | |
86 | * the command line with sh_mv= | |
87 | */ | |
fd8f20e8 | 88 | if (!machvec_selected) { |
82f81f47 PM |
89 | unsigned long machvec_size; |
90 | ||
91 | machvec_size = ((unsigned long)&__machvec_end - | |
92 | (unsigned long)&__machvec_start); | |
93 | ||
5556410e PM |
94 | /* |
95 | * Sanity check for machvec section alignment. Ensure | |
96 | * __initmv hasn't been misused. | |
97 | */ | |
98 | if (machvec_size % sizeof(struct sh_machine_vector)) | |
99 | panic("machvec misaligned, invalid __initmv use?"); | |
100 | ||
82f81f47 PM |
101 | /* |
102 | * If the machvec hasn't been preselected, use the first | |
103 | * vector (usually the only one) from .machvec.init. | |
104 | */ | |
105 | if (machvec_size >= sizeof(struct sh_machine_vector)) | |
106 | sh_mv = *(struct sh_machine_vector *)&__machvec_start; | |
107 | } | |
108 | ||
109 | printk(KERN_NOTICE "Booting machvec: %s\n", get_system_type()); | |
110 | ||
9655ad03 PM |
111 | /* |
112 | * Manually walk the vec, fill in anything that the board hasn't yet | |
113 | * by hand, wrapping to the generic implementation. | |
114 | */ | |
115 | #define mv_set(elem) do { \ | |
116 | if (!sh_mv.mv_##elem) \ | |
117 | sh_mv.mv_##elem = generic_##elem; \ | |
118 | } while (0) | |
119 | ||
120 | mv_set(inb); mv_set(inw); mv_set(inl); | |
121 | mv_set(outb); mv_set(outw); mv_set(outl); | |
122 | ||
123 | mv_set(inb_p); mv_set(inw_p); mv_set(inl_p); | |
124 | mv_set(outb_p); mv_set(outw_p); mv_set(outl_p); | |
125 | ||
126 | mv_set(insb); mv_set(insw); mv_set(insl); | |
127 | mv_set(outsb); mv_set(outsw); mv_set(outsl); | |
128 | ||
9655ad03 PM |
129 | mv_set(ioport_map); |
130 | mv_set(ioport_unmap); | |
131 | mv_set(irq_demux); | |
132 | ||
133 | if (!sh_mv.mv_nr_irqs) | |
134 | sh_mv.mv_nr_irqs = NR_IRQS; | |
135 | } |