forked from Minki/linux
14866543ad
This tidies up a lot of the PIO/MMIO split. No in-tree platforms were making use of the MMIO overloading through the machvec (nor have any of them been in some time), so we just kill all of that off. The ISA I/O routine wrapping remains unaffected, which remains the only special casing outside of the iomap API that boards need to think about. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
/*
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* arch/sh/kernel/machvec.c
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*
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* The SuperH machine vector setup handlers, yanked from setup.c
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*
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* Copyright (C) 1999 Niibe Yutaka
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* Copyright (C) 2002 - 2007 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <asm/machvec.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#define MV_NAME_SIZE 32
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#define for_each_mv(mv) \
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for ((mv) = (struct sh_machine_vector *)&__machvec_start; \
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(mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \
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(mv)++)
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static struct sh_machine_vector * __init get_mv_byname(const char *name)
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{
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struct sh_machine_vector *mv;
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for_each_mv(mv)
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if (strcasecmp(name, mv->mv_name) == 0)
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return mv;
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return NULL;
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}
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static unsigned int __initdata machvec_selected;
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static int __init early_parse_mv(char *from)
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{
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char mv_name[MV_NAME_SIZE] = "";
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char *mv_end;
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char *mv_comma;
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int mv_len;
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struct sh_machine_vector *mvp;
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mv_end = strchr(from, ' ');
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if (mv_end == NULL)
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mv_end = from + strlen(from);
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mv_comma = strchr(from, ',');
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mv_len = mv_end - from;
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if (mv_len > (MV_NAME_SIZE-1))
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mv_len = MV_NAME_SIZE-1;
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memcpy(mv_name, from, mv_len);
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mv_name[mv_len] = '\0';
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from = mv_end;
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machvec_selected = 1;
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/* Boot with the generic vector */
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if (strcmp(mv_name, "generic") == 0)
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return 0;
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mvp = get_mv_byname(mv_name);
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if (unlikely(!mvp)) {
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printk("Available vectors:\n\n\t'%s', ", sh_mv.mv_name);
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for_each_mv(mvp)
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printk("'%s', ", mvp->mv_name);
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printk("\n\n");
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panic("Failed to select machvec '%s' -- halting.\n",
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mv_name);
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} else
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sh_mv = *mvp;
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return 0;
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}
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early_param("sh_mv", early_parse_mv);
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void __init sh_mv_setup(void)
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{
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/*
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* Only overload the machvec if one hasn't been selected on
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* the command line with sh_mv=
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*/
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if (!machvec_selected) {
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unsigned long machvec_size;
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machvec_size = ((unsigned long)&__machvec_end -
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(unsigned long)&__machvec_start);
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/*
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* Sanity check for machvec section alignment. Ensure
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* __initmv hasn't been misused.
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*/
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if (machvec_size % sizeof(struct sh_machine_vector))
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panic("machvec misaligned, invalid __initmv use?");
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/*
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* If the machvec hasn't been preselected, use the first
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* vector (usually the only one) from .machvec.init.
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*/
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if (machvec_size >= sizeof(struct sh_machine_vector))
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sh_mv = *(struct sh_machine_vector *)&__machvec_start;
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}
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printk(KERN_NOTICE "Booting machvec: %s\n", get_system_type());
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/*
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* Manually walk the vec, fill in anything that the board hasn't yet
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* by hand, wrapping to the generic implementation.
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*/
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#define mv_set(elem) do { \
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if (!sh_mv.mv_##elem) \
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sh_mv.mv_##elem = generic_##elem; \
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} while (0)
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mv_set(inb); mv_set(inw); mv_set(inl);
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mv_set(outb); mv_set(outw); mv_set(outl);
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mv_set(inb_p); mv_set(inw_p); mv_set(inl_p);
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mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
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mv_set(insb); mv_set(insw); mv_set(insl);
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mv_set(outsb); mv_set(outsw); mv_set(outsl);
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mv_set(ioport_map);
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mv_set(ioport_unmap);
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mv_set(irq_demux);
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if (!sh_mv.mv_nr_irqs)
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sh_mv.mv_nr_irqs = NR_IRQS;
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}
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