summaryrefslogtreecommitdiffstats
path: root/arch/arm64/include/asm/assembler.h
blob: da2a13e8f1e67527703082e1db42143f8cb2434d (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
102
103
104
105
106
107
108
109
/*
 * Based on arch/arm/include/asm/assembler.h
 *
 * Copyright (C) 1996-2000 Russell King
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASSEMBLY__
#error "Only include this from assembly code"
#endif

#include <asm/ptrace.h>

/*
 * Stack pushing/popping (register pairs only). Equivalent to store decrement
 * before, load increment after.
 */
	.macro	push, xreg1, xreg2
	stp	\xreg1, \xreg2, [sp, #-16]!
	.endm

	.macro	pop, xreg1, xreg2
	ldp	\xreg1, \xreg2, [sp], #16
	.endm

/*
 * Enable and disable interrupts.
 */
	.macro	disable_irq
	msr	daifset, #2
	.endm

	.macro	enable_irq
	msr	daifclr, #2
	.endm

/*
 * Save/disable and restore interrupts.
 */
	.macro	save_and_disable_irqs, olddaif
	mrs	\olddaif, daif
	disable_irq
	.endm

	.macro	restore_irqs, olddaif
	msr	daif, \olddaif
	.endm

/*
 * Enable and disable debug exceptions.
 */
	.macro	disable_dbg
	msr	daifset, #8
	.endm

	.macro	enable_dbg
	msr	daifclr, #8
	.endm

	.macro	disable_step, tmp
	mrs	\tmp, mdscr_el1
	bic	\tmp, \tmp, #1
	msr	mdscr_el1, \tmp
	.endm

	.macro	enable_step, tmp
	mrs	\tmp, mdscr_el1
	orr	\tmp, \tmp, #1
	msr	mdscr_el1, \tmp
	.endm

	.macro	enable_dbg_if_not_stepping, tmp
	mrs	\tmp, mdscr_el1
	tbnz	\tmp, #1, 9990f
	enable_dbg
9990:
	.endm

/*
 * SMP data memory barrier
 */
	.macro	smp_dmb, opt
#ifdef CONFIG_SMP
	dmb	\opt
#endif
	.endm

#define USER(l, x...)				\
9999:	x;					\
	.section __ex_table,"a";		\
	.align	3;				\
	.quad	9999b,l;			\
	.previous

/*
 * Register aliases.
 */
lr	.req	x30		// link register