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/*
* Copyright (c) 1996-1999 The University of Utah and the Flux Group.
*
* This file is part of the OSKit Linux Glue Libraries, which are free
* software, also known as "open source;" you can redistribute them and/or
* modify them under the terms of the GNU General Public License (GPL),
* version 2, as published by the Free Software Foundation (FSF).
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include "shared.h"
#include "osenv.h"
#ifdef OSKIT_X86
#include <oskit/x86/base_cpu.h>
#endif
unsigned long volatile jiffies = 0;
#if 0
/*
* Timing loop count.
*/
unsigned long loops_per_sec = 1;
#endif
#ifdef OSKIT_X86
/*
* XXX: This gets referenced in a couple of places.
*/
struct cpuinfo_x86 boot_cpu_data;
#endif
/*
* End of physical memory.
*/
void * high_memory;
/*
* Pointer to a structure describing the current process-level activity.
* It is the responsibility of the code using this library to make sure
* this points to something meaningful when needed.
* For example, see OSKIT_LINUX_CREATE_CURRENT.
*/
struct task_struct *current;
static void
bump_jiffies()
{
jiffies++;
}
#if 0
/*
* Calibrate delay loop.
* Lifted straight from Linux.
*/
static void
calibrate_delay()
{
#ifdef LINUX_BOGOMIPS
printk("Calibrating delay loop.. ");
loops_per_sec = LINUX_BOGOMIPS * 500000;
printk("pre-loaded - %lu.%02lu BogoMips\n",
loops_per_sec / 500000,
(loops_per_sec / 5000) % 100);
#else
int ticks;
printk("Calibrating delay loop.. ");
while (loops_per_sec <<= 1) {
/* Wait for "start of" clock tick. */
ticks = jiffies;
while (ticks == jiffies)
/* nothing */;
/* Go .. */
ticks = jiffies;
__delay(loops_per_sec);
ticks = jiffies - ticks;
if (ticks >= HZ) {
loops_per_sec = muldiv(loops_per_sec, HZ, ticks);
printk("ok - %lu.%02lu BogoMips\n",
loops_per_sec / 500000,
(loops_per_sec / 5000) % 100);
return;
}
}
printk("failed\n");
#endif
}
#endif
void
oskit_linux_init()
{
static int inited = 0;
if (inited)
return;
inited = 1;
high_memory = (void *) osenv_mem_phys_max();
osenv_timer_register(bump_jiffies, HZ);
#if 0
/* Set loop count. */
calibrate_delay();
#endif
#ifdef OSKIT_X86
boot_cpu_data.x86 = base_cpuid.family;
#if 0
boot_cpu_data.loops_per_sec = loops_per_sec;
#endif
#endif
}
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