96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
/*
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* natfeat.c - ARAnyM hardware support via Native Features (natfeats)
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*
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* Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
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*
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* Reworked for Linux by Roman Zippel <zippel@linux-m68k.org>
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*
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* This software may be used and distributed according to the terms of
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* the GNU General Public License (GPL), incorporated herein by reference.
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*/
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/console.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <linux/io.h>
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#include <asm/machdep.h>
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#include <asm/natfeat.h>
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extern long nf_get_id_phys(unsigned long feature_name);
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asm("\n"
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" .global nf_get_id_phys,nf_call\n"
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"nf_get_id_phys:\n"
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" .short 0x7300\n"
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" rts\n"
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"nf_call:\n"
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" .short 0x7301\n"
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" rts\n"
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"1: moveq.l #0,%d0\n"
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" rts\n"
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" .section __ex_table,\"a\"\n"
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" .long nf_get_id_phys,1b\n"
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" .long nf_call,1b\n"
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" .previous");
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EXPORT_SYMBOL_GPL(nf_call);
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long nf_get_id(const char *feature_name)
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{
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/* feature_name may be in vmalloc()ed memory, so make a copy */
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char name_copy[32];
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size_t n;
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n = strlcpy(name_copy, feature_name, sizeof(name_copy));
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if (n >= sizeof(name_copy))
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return 0;
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return nf_get_id_phys(virt_to_phys(name_copy));
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}
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EXPORT_SYMBOL_GPL(nf_get_id);
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void nfprint(const char *fmt, ...)
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{
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static char buf[256];
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va_list ap;
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int n;
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va_start(ap, fmt);
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n = vsnprintf(buf, 256, fmt, ap);
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nf_call(nf_get_id("NF_STDERR"), virt_to_phys(buf));
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va_end(ap);
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}
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static void nf_poweroff(void)
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{
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long id = nf_get_id("NF_SHUTDOWN");
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if (id)
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nf_call(id);
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}
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void __init nf_init(void)
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{
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unsigned long id, version;
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char buf[256];
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id = nf_get_id("NF_VERSION");
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if (!id)
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return;
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version = nf_call(id);
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id = nf_get_id("NF_NAME");
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if (!id)
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return;
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nf_call(id, virt_to_phys(buf), 256);
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buf[255] = 0;
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pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
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version & 0xffff);
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register_platform_power_off(nf_poweroff);
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}
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