NetBSD/sys/arch/bebox/stand/boot/cpu.c

143 lines
3.4 KiB
C

/* $Id: cpu.c,v 1.1 1998/01/16 04:17:42 sakamoto Exp $ */
/*
* This file contains information proprietary to Be Inc.
*/
/*-
* Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
* 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.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Gary Thomas.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/*
* Return the ordinal of the CPU on which the code runs (0/1)
*/
#define CPU1_HRESET 0x20000000
int
whichCPU()
{
volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF3F0;
if (*CPU_control & 0x02000000)
{
return (1);
} else
{
return (0);
}
}
/*
* Force CPU #1 into Hard RESET state
*/
void
resetCPU1()
{
volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
*CPU_control = CPU1_HRESET;
}
/*
* Return state of CPU RESET register
*/
unsigned long
cpuState()
{
volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
return (*CPU_control);
}
/*
* Start CPU #1
*/
void
runCPU1(entry)
long entry;
{
volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
long *PEF_vector = (long *)0x3000;
long *PEF_vector2 = (long *)0x3018;
int i;
PEF_vector[0] = 0;
PEF_vector[1] = 0;
PEF_vector[2] = 0;
PEF_vector[3] = 0;
PEF_vector[0] = 0;
PEF_vector2[0] = 0;
*CPU_control = 0x80000000 | CPU1_HRESET;
/* Give the other CPU a chance to find the zero value */
delay(1000);
PEF_vector[0] = entry;
PEF_vector[1] = entry;
PEF_vector[2] = entry;
PEF_vector[3] = entry;
PEF_vector[0] = entry;
PEF_vector2[0] = entry;
}
/*
* CPU #1 runs here
*/
volatile int cpu_ctr = 0;
cpu1()
{
while(1) cpu_ctr++;
}
volatile int CPU1_alive = 0;
void
start_CPU1()
{
volatile long *key = (volatile long *)0x0080;
CPU1_alive++;
*key = 0;
/* Wait for a kernel to load up a vector of where we should jump */
while (*key == 0) {
delay(10);
}
run(*key);
}
void
wait_for(ptr)
volatile long *ptr;
{
int i;
for (i = 0; i < 10; i++) {
if (*ptr)
return;
delay(10);
}
printf("CPU #1 didn't start!\n");
}