natfeat.c

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/*
 * natfeat.c - ARAnyM hardware support via Native Features (natfeats)
 *
 * Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
 *
 * Reworked for Linux by Roman Zippel <[email protected]>
 *
 * This software may be used and distributed according to the terms of
 * the GNU General Public License (GPL), incorporated herein by reference.
 */

#include <linux/types.h>
#include <linux/console.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/natfeat.h>

asm("\n"
"   .global nf_get_id,nf_call\n"
"nf_get_id:\n"
"   .short  0x7300\n"
"   rts\n"
"nf_call:\n"
"   .short  0x7301\n"
"   rts\n"
"1: moveq.l #0,%d0\n"
"   rts\n"
"   .section __ex_table,\"a\"\n"
"   .long   nf_get_id,1b\n"
"   .long   nf_call,1b\n"
"   .previous");
EXPORT_SYMBOL_GPL(nf_get_id);
EXPORT_SYMBOL_GPL(nf_call);

void nfprint(const char *fmt, ...)
{
    static char buf[256];
    va_list ap;
    int n;

    va_start(ap, fmt);
    n = vsnprintf(buf, 256, fmt, ap);
    nf_call(nf_get_id("NF_STDERR"), buf);
    va_end(ap);
}

static void nf_poweroff(void)
{
    long id = nf_get_id("NF_SHUTDOWN");

    if (id)
        nf_call(id);
}

void nf_init(void)
{
    unsigned long id, version;
    char buf[256];

    id = nf_get_id("NF_VERSION");
    if (!id)
        return;
    version = nf_call(id);

    id = nf_get_id("NF_NAME");
    if (!id)
        return;
    nf_call(id, buf, 256);
    buf[255] = 0;

    pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
        version & 0xffff);

    mach_power_off = nf_poweroff;
}