2 * linux/include/asm-arm/assembler.h
4 * Copyright (C) 1996-2000 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This file contains arm architecture specific defines
11 * for the different processors.
13 * Do not include any C declarations in this file - it is included by
17 #error "Only include this from assembly code"
20 #include <asm/ptrace.h>
23 * Endian independent macros for shifting bytes within registers.
28 #define get_byte_0 lsl #0
29 #define get_byte_1 lsr #8
30 #define get_byte_2 lsr #16
31 #define get_byte_3 lsr #24
32 #define put_byte_0 lsl #0
33 #define put_byte_1 lsl #8
34 #define put_byte_2 lsl #16
35 #define put_byte_3 lsl #24
39 #define get_byte_0 lsr #24
40 #define get_byte_1 lsr #16
41 #define get_byte_2 lsr #8
42 #define get_byte_3 lsl #0
43 #define put_byte_0 lsl #24
44 #define put_byte_1 lsl #16
45 #define put_byte_2 lsl #8
46 #define put_byte_3 lsl #0
50 * Data preload for architectures that support it
52 #if __LINUX_ARM_ARCH__ >= 5
53 #define PLD(code...) code
58 #define MODE_USR USR_MODE
59 #define MODE_FIQ FIQ_MODE
60 #define MODE_IRQ IRQ_MODE
61 #define MODE_SVC SVC_MODE
63 #define DEFAULT_FIQ MODE_FIQ
66 * LOADREGS - ldm with PC in register list (eg, ldmfd sp!, {pc})
69 #define LOADREGS(cond, base, reglist...)\
70 ldm##cond base,reglist
72 #define LOADREGS(cond, base, reglist...)\
73 ldm/**/cond base,reglist
77 * Build a return instruction for this processor type.
79 #define RETINSTR(instr, regs...)\
83 * Save the current IRQ state and disable IRQs. Note that this macro
84 * assumes FIQs are enabled, and that the processor is in SVC mode.
86 .macro save_and_disable_irqs, oldcpsr, temp
88 mov \temp, #PSR_I_BIT | MODE_SVC
93 * Restore interrupt state previously stored in a register. We don't
94 * guarantee that this will preserve the flags.
96 .macro restore_irqs, oldcpsr
101 * These two are used to save LR/restore PC over a user-based access.
102 * The old 26-bit architecture requires that we do. On 32-bit
103 * architecture, we can safely ignore this requirement.
114 .section __ex_table,"a"; \