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
|
/* $NetBSD: spl.S,v 1.11 2021/10/11 07:26:17 rin Exp $ */
/*
* Copyright (c) 1996-1998 Mark Brinicombe.
* Copyright (c) Brini.
* 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 Mark Brinicombe
* for the NetBSD Project.
* 4. The name of the company nor the name of the author may 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 OR CONTRIBUTORS 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.
*
* spl routines
*
* Created : 01/03/96
*/
#include "assym.h"
#include <arm/asm.h>
#include <arm/locore.h>
#include <arm/arm32/psl.h>
RCSID("$NetBSD: spl.S,v 1.11 2021/10/11 07:26:17 rin Exp $")
.text
.align 0
.Lcpu_info_store:
.word _C_LABEL(cpu_info_store)
ENTRY(raisespl)
mov r3, r0 /* Save the new value */
ldr r1, .Lcpu_info_store /* Get the current spl level */
ldr r0, [r1, #CI_CPL]
cmp r3, r0
RETc(le)
stmfd sp!, {r0, r1, r4, lr} /* Preserve registers */
/* Disable interrupts */
mrs r4, cpsr
orr r2, r4, #(I32_bit)
msr cpsr_c, r2
str r3, [r1, #CI_CPL] /* Store the new spl level */
bl _C_LABEL(irq_setmasks) /* Update the actual masks */
msr cpsr_c, r4 /* Restore interrupts */
ldmfd sp!, {r0, r1, r4, pc} /* Restore registers */
ENTRY(lowerspl)
mov r3, r0 /* Save the new value */
ldr r1, .Lcpu_info_store /* Get the current spl level */
ldr r0, [r1, #CI_CPL]
cmp r3, r0
RETc(ge)
stmfd sp!, {r0, r1, r4, lr} /* Preserve registers */
/* Disable interrupts */
mrs r4, cpsr
orr r2, r4, #(I32_bit)
msr cpsr_c, r2
str r3, [r1, #CI_CPL] /* Store the new spl level */
bl _C_LABEL(irq_setmasks) /* Update the actual masks */
msr cpsr_all, r4
#ifdef __HAVE_FAST_SOFTINTS
bl _C_LABEL(dosoftints) /* Process any pending soft ints */
#endif
ldmfd sp!, {r0, r1, r4, pc} /* restore registers */
ENTRY(splx)
mov r3, r0 /* Save the new value */
ldr r1, .Lcpu_info_store /* Get the current spl level */
ldr r0, [r1, #CI_CPL]
cmp r3, r0
RETc(eq)
stmfd sp!, {r0, r1, r4, lr}
/* Disable interrupts */
mrs r4, cpsr
orr r2, r4, #(I32_bit)
msr cpsr_c, r2
str r3, [r1, #CI_CPL] /* Store the new spl level */
bl _C_LABEL(irq_setmasks) /* Update the actual masks */
msr cpsr_c, r4
#ifdef __HAVE_FAST_SOFTINTS
bl _C_LABEL(dosoftints) /* Process any pending soft ints */
#endif
ldmfd sp!, {r0, r1, r4, pc}
|