Subversion Repositories HelenOS

Rev

Rev 204 | Rev 253 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
173 jermar 1
/*
191 decky 2
 * Copyright (C) 2005 Martin Decky
173 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#ifndef __ppc_ASM_H__
30
#define __ppc_ASM_H__
31
 
32
#include <arch/types.h>
33
#include <config.h>
34
 
191 decky 35
/** Set priority level low
36
 *
37
 * Enable interrupts and return previous
38
 * value of EE.
39
 */
40
static inline pri_t cpu_priority_low(void) {
41
    pri_t v;
42
    __asm__ volatile (
204 decky 43
        "mfmsr %0\n"
44
        "mfmsr %%r31\n"
45
        "ori %%r31, %%r31, 1 << 15\n"
46
        "mtmsr %%r31\n"
191 decky 47
        : "=r" (v)
204 decky 48
        :
49
        : "%r31"
191 decky 50
    );
51
    return v;
52
}
53
 
54
/** Set priority level high
55
 *
56
 * Disable interrupts and return previous
57
 * value of EE.
58
 */
59
static inline pri_t cpu_priority_high(void) {
60
    pri_t v;
61
    __asm__ volatile (
204 decky 62
        "mfmsr %0\n"
63
        "mfmsr %%r31\n"
64
        "rlwinm %%r31, %%r31, 0, 17, 15\n"
65
        "mtmsr %%r31\n"
191 decky 66
        : "=r" (v)
204 decky 67
        :
68
        : "%r31"
191 decky 69
    );
70
    return v;
71
}
72
 
73
/** Restore priority level
74
 *
75
 * Restore EE.
76
 */
77
static inline void cpu_priority_restore(pri_t pri) {
78
    __asm__ volatile (
204 decky 79
        "mfmsr %%r31\n"
80
        "rlwimi  %0, %%r31, 0, 17, 15\n"
210 decky 81
        "cmpw 0, %0, %%r31\n"
82
        "beq 0f\n"
204 decky 83
        "mtmsr %0\n"
210 decky 84
        "0:\n"
204 decky 85
        : "=r" (pri)
86
        : "0" (pri)
87
        : "%r31"
191 decky 88
    );
89
}
90
 
210 decky 91
/** Return raw priority level
92
 *
93
 * Return EE.
94
 */
95
static inline pri_t cpu_priority_read(void) {
96
    pri_t v;
97
    __asm__ volatile (
98
        "mfmsr %0\n"
99
        : "=r" (v)
100
    );
101
    return v;
102
}
103
 
173 jermar 104
/* TODO: implement the real stuff */
105
static inline __address get_stack_base(void)
106
{
107
    return NULL;
108
}
109
 
201 decky 110
void cpu_sleep(void);
111
void asm_delay_loop(__u32 t);
112
 
173 jermar 113
#endif