forked from Minki/linux
9655ad03af
This fixes up much of the machvec handling, allowing for it to be overloaded on boot. Making practical use of this still requires some Kconfig munging, however. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/*
|
|
* arch/sh/kernel/machvec.c
|
|
*
|
|
* The SuperH machine vector setup handlers, yanked from setup.c
|
|
*
|
|
* Copyright (C) 1999 Niibe Yutaka
|
|
* Copyright (C) 2002 - 2007 Paul Mundt
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <asm/machvec.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
|
|
#define MV_NAME_SIZE 32
|
|
|
|
#define for_each_mv(mv) \
|
|
for ((mv) = (struct sh_machine_vector *)&__machvec_start; \
|
|
(mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \
|
|
(mv)++)
|
|
|
|
static struct sh_machine_vector * __init get_mv_byname(const char *name)
|
|
{
|
|
struct sh_machine_vector *mv;
|
|
|
|
for_each_mv(mv)
|
|
if (strcasecmp(name, get_system_type()) == 0)
|
|
return mv;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int __init early_parse_mv(char *from)
|
|
{
|
|
char mv_name[MV_NAME_SIZE] = "";
|
|
char *mv_end;
|
|
char *mv_comma;
|
|
int mv_len;
|
|
struct sh_machine_vector *mvp;
|
|
|
|
mv_end = strchr(from, ' ');
|
|
if (mv_end == NULL)
|
|
mv_end = from + strlen(from);
|
|
|
|
mv_comma = strchr(from, ',');
|
|
mv_len = mv_end - from;
|
|
if (mv_len > (MV_NAME_SIZE-1))
|
|
mv_len = MV_NAME_SIZE-1;
|
|
memcpy(mv_name, from, mv_len);
|
|
mv_name[mv_len] = '\0';
|
|
from = mv_end;
|
|
|
|
if (strcmp(sh_mv.mv_name, mv_name) != 0) {
|
|
mvp = get_mv_byname(mv_name);
|
|
if (unlikely(!mvp)) {
|
|
printk("Available vectors:\n\n\t");
|
|
for_each_mv(mvp)
|
|
printk("'%s', ", mvp->mv_name);
|
|
printk("\n\n");
|
|
panic("Failed to select machvec '%s' -- halting.\n",
|
|
mv_name);
|
|
} else
|
|
sh_mv = *mvp;
|
|
}
|
|
|
|
printk(KERN_NOTICE "Booting machvec: %s\n", sh_mv.mv_name);
|
|
return 0;
|
|
}
|
|
early_param("sh_mv", early_parse_mv);
|
|
|
|
void __init sh_mv_setup(void)
|
|
{
|
|
/*
|
|
* Manually walk the vec, fill in anything that the board hasn't yet
|
|
* by hand, wrapping to the generic implementation.
|
|
*/
|
|
#define mv_set(elem) do { \
|
|
if (!sh_mv.mv_##elem) \
|
|
sh_mv.mv_##elem = generic_##elem; \
|
|
} while (0)
|
|
|
|
mv_set(inb); mv_set(inw); mv_set(inl);
|
|
mv_set(outb); mv_set(outw); mv_set(outl);
|
|
|
|
mv_set(inb_p); mv_set(inw_p); mv_set(inl_p);
|
|
mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
|
|
|
|
mv_set(insb); mv_set(insw); mv_set(insl);
|
|
mv_set(outsb); mv_set(outsw); mv_set(outsl);
|
|
|
|
mv_set(readb); mv_set(readw); mv_set(readl);
|
|
mv_set(writeb); mv_set(writew); mv_set(writel);
|
|
|
|
mv_set(ioport_map);
|
|
mv_set(ioport_unmap);
|
|
mv_set(irq_demux);
|
|
|
|
if (!sh_mv.mv_nr_irqs)
|
|
sh_mv.mv_nr_irqs = NR_IRQS;
|
|
}
|