1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/* $OpenBSD: asm_macro.h,v 1.20 2002/01/09 00:38:54 miod Exp $ */
/*
* Mach Operating System
* Copyright (c) 1993-1991 Carnegie Mellon University
* Copyright (c) 1991 OMRON Corporation
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef __MACHINE_M88K_ASM_MACRO_H__
#define __MACHINE_M88K_ASM_MACRO_H__
#include <machine/asm.h>
/*
* Various compiler macros used for speed and efficiency.
* Anyone can include.
*/
/*
* Flushes the data pipeline.
*/
static __inline__ void flush_pipeline(void)
{
__asm__ __volatile__ (FLUSH_PIPELINE_STRING);
}
#define db_flush_pipeline flush_pipeline
/*
* PSR_TYPE is the type of the Process Status Register.
*/
typedef unsigned long m88k_psr_type;
/*
* disable_interrupts_return_psr()
*
* The INTERRUPT_DISABLE bit is set in the PSR and the *PREVIOUS*
* PSR is returned. Intended to be used with set_psr() [below] as in:
*
* {
* m88k_psr_type psr;
* .
* .
* psr = disable_interrupts_return_psr();
* .
* SHORT [time-wise] CRITICAL SECTION HERE
* .
* set_psr(psr);
* .
* .
*/
static __inline__ m88k_psr_type disable_interrupts_return_psr(void)
{
register m88k_psr_type temp, oldpsr;
__asm__ __volatile__ ("ldcr %0, cr1" : "=r" (oldpsr));
__asm__ __volatile__ ("set %1, %0, 1<1>" : "=r" (oldpsr), "=r" (temp));
__asm__ __volatile__ ("stcr %0, cr1" : "=r" (temp));
__asm__ __volatile__ (FLUSH_PIPELINE_STRING);
return oldpsr;
}
#define disable_interrupt() (void)disable_interrupts_return_psr()
/*
* Sets the PSR. See comments above.
*/
static __inline__ void set_psr(register m88k_psr_type psr)
{
__asm__ __volatile__ ("stcr %0, cr1" :: "r" (psr));
__asm__ __volatile__ (FLUSH_PIPELINE_STRING);
}
/*
* Gets the PSR. See comments above.
*/
static __inline__ m88k_psr_type get_psr(void)
{
register m88k_psr_type psr;
__asm__ __volatile__ ("ldcr %0, cr1" : "=r" (psr));
return psr;
}
/*
* Enables interrupts.
*/
static __inline__ m88k_psr_type enable_interrupts_return_psr(void)
{
register m88k_psr_type temp, oldpsr; /* need a temporary register */
__asm__ __volatile__ ("ldcr %0, cr1" : "=r" (oldpsr));
__asm__ __volatile__ ("clr %1, %0, 1<1>" : "=r" (oldpsr), "=r" (temp));
__asm__ __volatile__ ("stcr %0, cr1" : "=r" (temp));
__asm__ __volatile__ (FLUSH_PIPELINE_STRING);
return oldpsr;
}
#define enable_interrupt() (void)enable_interrupts_return_psr()
#define db_enable_interrupt enable_interrupt
#define db_disable_interrupt disable_interrupt
/*
* Gets the current stack pointer.
*/
static __inline__ unsigned long stack_pointer(void)
{
register unsigned long sp;
__asm__ __volatile__ ("or %0,r0,r31" : "=r" (sp));
return sp;
}
/*
* Provide access from C code to the assembly instruction ff1
*/
static __inline__ unsigned ff1(register unsigned val)
{
__asm__ __volatile__ ("ff1 %0, %0" : "=r" (val) : "0" (val));
return val;
}
#endif /* __MACHINE_M88K_ASM_MACRO_H__ */
|
