2 * arch/sh/kernel/machvec.c
4 * The SuperH machine vector setup handlers, yanked from setup.c
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 - 2007 Paul Mundt
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
13 #include <linux/init.h>
14 #include <linux/string.h>
15 #include <asm/machvec.h>
16 #include <asm/sections.h>
20 #define MV_NAME_SIZE 32
22 #define for_each_mv(mv) \
23 for ((mv) = (struct sh_machine_vector *)&__machvec_start; \
24 (mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \
27 static struct sh_machine_vector * __init get_mv_byname(const char *name)
29 struct sh_machine_vector *mv;
32 if (strcasecmp(name, mv->mv_name) == 0)
38 static unsigned int __initdata machvec_selected;
40 static int __init early_parse_mv(char *from)
42 char mv_name[MV_NAME_SIZE] = "";
46 struct sh_machine_vector *mvp;
48 mv_end = strchr(from, ' ');
50 mv_end = from + strlen(from);
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';
62 /* Boot with the generic vector */
63 if (strcmp(mv_name, "generic") == 0)
66 mvp = get_mv_byname(mv_name);
68 printk("Available vectors:\n\n\t'%s', ", sh_mv.mv_name);
70 printk("'%s', ", mvp->mv_name);
72 panic("Failed to select machvec '%s' -- halting.\n",
79 early_param("sh_mv", early_parse_mv);
81 void __init sh_mv_setup(void)
84 * Only overload the machvec if one hasn't been selected on
85 * the command line with sh_mv=
87 if (!machvec_selected) {
88 unsigned long machvec_size;
90 machvec_size = ((unsigned long)&__machvec_end -
91 (unsigned long)&__machvec_start);
94 * Sanity check for machvec section alignment. Ensure
95 * __initmv hasn't been misused.
97 if (machvec_size % sizeof(struct sh_machine_vector))
98 panic("machvec misaligned, invalid __initmv use?");
101 * If the machvec hasn't been preselected, use the first
102 * vector (usually the only one) from .machvec.init.
104 if (machvec_size >= sizeof(struct sh_machine_vector))
105 sh_mv = *(struct sh_machine_vector *)&__machvec_start;
108 printk(KERN_NOTICE "Booting machvec: %s\n", get_system_type());
111 * Manually walk the vec, fill in anything that the board hasn't yet
112 * by hand, wrapping to the generic implementation.
114 #define mv_set(elem) do { \
115 if (!sh_mv.mv_##elem) \
116 sh_mv.mv_##elem = generic_##elem; \
119 mv_set(inb); mv_set(inw); mv_set(inl);
120 mv_set(outb); mv_set(outw); mv_set(outl);
122 mv_set(inb_p); mv_set(inw_p); mv_set(inl_p);
123 mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
125 mv_set(insb); mv_set(insw); mv_set(insl);
126 mv_set(outsb); mv_set(outsw); mv_set(outsl);
128 mv_set(readb); mv_set(readw); mv_set(readl);
129 mv_set(writeb); mv_set(writew); mv_set(writel);
132 mv_set(ioport_unmap);
135 if (!sh_mv.mv_nr_irqs)
136 sh_mv.mv_nr_irqs = NR_IRQS;