aboutsummaryrefslogtreecommitdiff
path: root/kernel/stack.h
blob: d553076c381ee8eefbbb17336673951c4d47fbcf (plain)
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
/* $Id$ */
/*
 * Copyright (c) 2010 Dimitri Sokolyuk <demon@dim13.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef __STACK_H
#define __STACK_H

#define NAKED(name, ...)	\
void name (void) __attribute__ ((naked)) __VA_ARGS__;	\
void name (void)

/* 68 cycles */
#define pusha() asm volatile (			\
		"push	r1		\n"	\
		"push	r0		\n"	\
		"in	r0, __SREG__	\n"	\
		"push	r0		\n"	\
		"eor	r1, r1		\n"	\
		"push	r2		\n"	\
		"push	r3		\n"	\
		"push	r4		\n"	\
		"push	r5		\n"	\
		"push	r6		\n"	\
		"push	r7		\n"	\
		"push	r8		\n"	\
		"push	r9		\n"	\
		"push	r10		\n"	\
		"push	r11		\n"	\
		"push	r12		\n"	\
		"push	r13		\n"	\
		"push	r14		\n"	\
		"push	r15		\n"	\
		"push	r16		\n"	\
		"push	r17		\n"	\
		"push	r18		\n"	\
		"push	r19		\n"	\
		"push	r20		\n"	\
		"push	r21		\n"	\
		"push	r22		\n"	\
		"push	r23		\n"	\
		"push	r24		\n"	\
		"push	r25		\n"	\
		"push	r26		\n"	\
		"push	r27		\n"	\
		"push	r28		\n"	\
		"push	r29		\n"	\
		"push	r30		\n"	\
		"push	r31		\n"	)

/* 69 cycles */
#define popa() asm volatile (			\
		"pop	r31		\n"	\
		"pop	r30		\n"	\
		"pop	r29		\n"	\
		"pop	r28		\n"	\
		"pop	r27		\n"	\
		"pop	r26		\n"	\
		"pop	r25		\n"	\
		"pop	r24		\n"	\
		"pop	r23		\n"	\
		"pop	r22		\n"	\
		"pop	r21		\n"	\
		"pop	r20		\n"	\
		"pop	r19		\n"	\
		"pop	r18		\n"	\
		"pop	r17		\n"	\
		"pop	r16		\n"	\
		"pop	r15		\n"	\
		"pop	r14		\n"	\
		"pop	r13		\n"	\
		"pop	r12		\n"	\
		"pop	r11		\n"	\
		"pop	r10		\n"	\
		"pop	r9		\n"	\
		"pop	r8		\n"	\
		"pop	r7		\n"	\
		"pop	r6		\n"	\
		"pop	r5		\n"	\
		"pop	r4		\n"	\
		"pop	r3		\n"	\
		"pop	r2		\n"	\
		"pop	r0		\n"	\
		"out	__SREG__, r0	\n"	\
		"pop	r0		\n"	\
		"pop	r1		\n"	)

#define ret() asm volatile ("ret");
#endif