freebsd-dev/sys/dev/random/probe.c
Scott Long e39e116ca2 malloc.h relies on param.h for a definition of MAXCPU. I guess that there is
other header pollution that makes this work right now, but it falls over when
doing a RELENG_5 -> HEAD upgrade.
2005-05-30 05:01:44 +00:00

73 lines
2.3 KiB
C

/*-
* Copyright (c) 2004 Mark R V Murray
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/random.h>
#include <sys/selinfo.h>
#include <sys/stdint.h>
#include <sys/sysctl.h>
#if defined(__i386__) && !defined(PC98)
#include <machine/cpufunc.h>
#include <machine/cputypes.h>
#endif
#include <dev/random/randomdev.h>
#include <dev/random/randomdev_soft.h>
#include <dev/random/nehemiah.h>
void
random_ident_hardware(struct random_systat *systat)
{
#if defined(__i386__) && !defined(PC98)
u_int regs[4];
#endif
/* Set default to software */
*systat = random_yarrow;
/* Then go looking for hardware */
#if defined(__i386__) && !defined(PC98)
if (cpu_class < CPUCLASS_586)
return;
do_cpuid(1, regs);
if ((regs[0] & 0xf) >= 3) {
do_cpuid(0xc0000000, regs);
if (regs[0] == 0xc0000001) {
do_cpuid(0xc0000001, regs);
if ((regs[3] & 0x0c) == 0x0c)
*systat = random_nehemiah;
}
}
#endif
}