149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/* $NetBSD: cpu.c,v 1.3 1999/06/28 01:20:44 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.
|
|
*/
|
|
|
|
#include <stand.h>
|
|
#include "boot.h"
|
|
|
|
/*
|
|
* 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)
|
|
void *entry;
|
|
{
|
|
volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
|
|
long *PEF_vector = (long *)0x3000;
|
|
long *PEF_vector2 = (long *)0x3018;
|
|
|
|
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] = (long)entry;
|
|
PEF_vector[1] = (long)entry;
|
|
PEF_vector[2] = (long)entry;
|
|
PEF_vector[3] = (long)entry;
|
|
PEF_vector[0] = (long)entry;
|
|
PEF_vector2[0] = (long)entry;
|
|
}
|
|
|
|
/*
|
|
* CPU #1 runs here
|
|
*/
|
|
volatile int cpu_ctr = 0;
|
|
|
|
void
|
|
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(NULL, NULL, NULL, NULL, (void *)*key);
|
|
}
|
|
|
|
void
|
|
wait_for(ptr)
|
|
volatile int *ptr;
|
|
{
|
|
int i;
|
|
for (i = 0; i < 10; i++) {
|
|
if (*ptr)
|
|
return;
|
|
delay(10);
|
|
}
|
|
printf("CPU #1 didn't start!\n");
|
|
}
|