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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> | |
d44ee12a | 17 | #include <asm/addrspace.h> |
fa43972f | 18 | #include <asm/setup.h> |
9655ad03 PM |
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 | ||
29 | static struct sh_machine_vector * __init get_mv_byname(const char *name) | |
30 | { | |
31 | struct sh_machine_vector *mv; | |
32 | ||
33 | for_each_mv(mv) | |
82f81f47 | 34 | if (strcasecmp(name, mv->mv_name) == 0) |
9655ad03 PM |
35 | return mv; |
36 | ||
37 | return NULL; | |
38 | } | |
39 | ||
fd8f20e8 PM |
40 | static unsigned int __initdata machvec_selected; |
41 | ||
9655ad03 PM |
42 | static 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 | ||
fd8f20e8 PM |
62 | machvec_selected = 1; |
63 | ||
64 | /* Boot with the generic vector */ | |
65 | if (strcmp(mv_name, "generic") == 0) | |
66 | return 0; | |
67 | ||
82f81f47 PM |
68 | mvp = get_mv_byname(mv_name); |
69 | if (unlikely(!mvp)) { | |
fd8f20e8 | 70 | printk("Available vectors:\n\n\t'%s', ", sh_mv.mv_name); |
82f81f47 PM |
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; | |
9655ad03 | 78 | |
9655ad03 PM |
79 | return 0; |
80 | } | |
81 | early_param("sh_mv", early_parse_mv); | |
82 | ||
83 | void __init sh_mv_setup(void) | |
84 | { | |
82f81f47 PM |
85 | /* |
86 | * Only overload the machvec if one hasn't been selected on | |
87 | * the command line with sh_mv= | |
88 | */ | |
fd8f20e8 | 89 | if (!machvec_selected) { |
82f81f47 PM |
90 | unsigned long machvec_size; |
91 | ||
92 | machvec_size = ((unsigned long)&__machvec_end - | |
93 | (unsigned long)&__machvec_start); | |
94 | ||
5556410e PM |
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 | ||
82f81f47 PM |
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 | ||
9655ad03 PM |
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 | ||
9655ad03 | 121 | mv_set(irq_demux); |
eb9b9b56 | 122 | mv_set(mode_pins); |
19d8f84f | 123 | mv_set(mem_init); |
9655ad03 PM |
124 | |
125 | if (!sh_mv.mv_nr_irqs) | |
126 | sh_mv.mv_nr_irqs = NR_IRQS; | |
127 | } |