1/*	$NetBSD: cpu.c,v 1.6 2005/12/11 12:17:04 christos Exp $	*/
2
3/*
4 * This file contains information proprietary to Be Inc.
5 */
6
7/*-
8 * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *      This product includes software developed by Gary Thomas.
22 * 4. The name of the author may not be used to endorse or promote products
23 *    derived from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include <lib/libsa/stand.h>
38#include "boot.h"
39
40/*
41 * Return the ordinal of the CPU on which the code runs (0/1)
42 */
43
44#define	CPU1_HRESET	0x20000000
45
46int
47whichCPU(void)
48{
49	volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF3F0;
50
51	if (*CPU_control & 0x02000000) {
52		return 1;
53	} else {
54		return 0;
55	}
56}
57
58/*
59 * Force CPU #1 into Hard RESET state
60 */
61void
62resetCPU1(void)
63{
64	volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
65
66	*CPU_control = CPU1_HRESET;
67}
68
69/*
70 * Return state of CPU RESET register
71 */
72unsigned long
73cpuState(void)
74{
75	volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
76
77	return *CPU_control;
78}
79
80/*
81 * Start CPU #1
82 */
83void
84runCPU1(void *entry)
85{
86	volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
87	long *PEF_vector = (long *)0x3000;
88	long *PEF_vector2 = (long *)0x3018;
89
90	PEF_vector[0] = 0;
91	PEF_vector[1] = 0;
92	PEF_vector[2] = 0;
93	PEF_vector[3] = 0;
94	PEF_vector[0] = 0;
95	PEF_vector2[0] = 0;
96	*CPU_control = 0x80000000 | CPU1_HRESET;
97	/* Give the other CPU a chance to find the zero value */
98	delay(1000);
99	PEF_vector[0] = (long)entry;
100	PEF_vector[1] = (long)entry;
101	PEF_vector[2] = (long)entry;
102	PEF_vector[3] = (long)entry;
103	PEF_vector[0] = (long)entry;
104	PEF_vector2[0] = (long)entry;
105}
106
107/*
108 * CPU #1 runs here
109 */
110volatile int cpu_ctr = 0;
111
112void
113cpu1(void)
114{
115	while (1)
116		cpu_ctr++;
117}
118
119volatile int CPU1_alive = 0;
120
121void
122start_CPU1(void)
123{
124	volatile long *key = (volatile long *)0x0080;
125
126	CPU1_alive++;
127	*key = 0;
128	/* Wait for a kernel to load up a vector of where we should jump */
129	while (*key == 0)
130		delay(10);
131
132	run(NULL, NULL, NULL, NULL, (void *)*key);
133}
134
135void
136wait_for(volatile int *ptr)
137{
138	int i;
139	for (i = 0; i < 10; i++) {
140		if (*ptr)
141			return;
142		delay(10);
143	}
144	printf("CPU #1 didn't start!\n");
145}
146