| Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame^] | 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/io.h> |
| 18 | #include <asm/irq.h> |
| 19 | |
| 20 | #define MV_NAME_SIZE 32 |
| 21 | |
| 22 | #define for_each_mv(mv) \ |
| 23 | for ((mv) = (struct sh_machine_vector *)&__machvec_start; \ |
| 24 | (mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \ |
| 25 | (mv)++) |
| 26 | |
| 27 | static struct sh_machine_vector * __init get_mv_byname(const char *name) |
| 28 | { |
| 29 | struct sh_machine_vector *mv; |
| 30 | |
| 31 | for_each_mv(mv) |
| 32 | if (strcasecmp(name, get_system_type()) == 0) |
| 33 | return mv; |
| 34 | |
| 35 | return NULL; |
| 36 | } |
| 37 | |
| 38 | static int __init early_parse_mv(char *from) |
| 39 | { |
| 40 | char mv_name[MV_NAME_SIZE] = ""; |
| 41 | char *mv_end; |
| 42 | char *mv_comma; |
| 43 | int mv_len; |
| 44 | struct sh_machine_vector *mvp; |
| 45 | |
| 46 | mv_end = strchr(from, ' '); |
| 47 | if (mv_end == NULL) |
| 48 | mv_end = from + strlen(from); |
| 49 | |
| 50 | mv_comma = strchr(from, ','); |
| 51 | mv_len = mv_end - from; |
| 52 | if (mv_len > (MV_NAME_SIZE-1)) |
| 53 | mv_len = MV_NAME_SIZE-1; |
| 54 | memcpy(mv_name, from, mv_len); |
| 55 | mv_name[mv_len] = '\0'; |
| 56 | from = mv_end; |
| 57 | |
| 58 | if (strcmp(sh_mv.mv_name, mv_name) != 0) { |
| 59 | mvp = get_mv_byname(mv_name); |
| 60 | if (unlikely(!mvp)) { |
| 61 | printk("Available vectors:\n\n\t"); |
| 62 | for_each_mv(mvp) |
| 63 | printk("'%s', ", mvp->mv_name); |
| 64 | printk("\n\n"); |
| 65 | panic("Failed to select machvec '%s' -- halting.\n", |
| 66 | mv_name); |
| 67 | } else |
| 68 | sh_mv = *mvp; |
| 69 | } |
| 70 | |
| 71 | printk(KERN_NOTICE "Booting machvec: %s\n", sh_mv.mv_name); |
| 72 | return 0; |
| 73 | } |
| 74 | early_param("sh_mv", early_parse_mv); |
| 75 | |
| 76 | void __init sh_mv_setup(void) |
| 77 | { |
| 78 | /* |
| 79 | * Manually walk the vec, fill in anything that the board hasn't yet |
| 80 | * by hand, wrapping to the generic implementation. |
| 81 | */ |
| 82 | #define mv_set(elem) do { \ |
| 83 | if (!sh_mv.mv_##elem) \ |
| 84 | sh_mv.mv_##elem = generic_##elem; \ |
| 85 | } while (0) |
| 86 | |
| 87 | mv_set(inb); mv_set(inw); mv_set(inl); |
| 88 | mv_set(outb); mv_set(outw); mv_set(outl); |
| 89 | |
| 90 | mv_set(inb_p); mv_set(inw_p); mv_set(inl_p); |
| 91 | mv_set(outb_p); mv_set(outw_p); mv_set(outl_p); |
| 92 | |
| 93 | mv_set(insb); mv_set(insw); mv_set(insl); |
| 94 | mv_set(outsb); mv_set(outsw); mv_set(outsl); |
| 95 | |
| 96 | mv_set(readb); mv_set(readw); mv_set(readl); |
| 97 | mv_set(writeb); mv_set(writew); mv_set(writel); |
| 98 | |
| 99 | mv_set(ioport_map); |
| 100 | mv_set(ioport_unmap); |
| 101 | mv_set(irq_demux); |
| 102 | |
| 103 | if (!sh_mv.mv_nr_irqs) |
| 104 | sh_mv.mv_nr_irqs = NR_IRQS; |
| 105 | } |