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/*
* linux/asm/assembler.h
*
* This file contains arm architecture specific defines
* for the different processors.
*
* Do not include any C declarations in this file - it is included by
* assembler source.
*/
#ifndef __ASSEMBLY__
#error "Only include this from assembly code"
#endif
/*
* Endian independent macros for shifting bytes within registers.
*/
#define pull lsr
#define push lsl
#define byte(x) (x*8)
#ifdef __STDC__
#define LOADREGS(cond, base, reglist...)\
ldm##cond base,reglist^
#define RETINSTR(instr, regs...)\
instr##s regs
#else
#define LOADREGS(cond, base, reglist...)\
ldm/**/cond base,reglist^
#define RETINSTR(instr, regs...)\
instr/**/s regs
#endif
#define MODENOP\
mov r0, r0
#define MODE(savereg,tmpreg,mode) \
mov savereg, pc; \
bic tmpreg, savereg, $0x0c000003; \
orr tmpreg, tmpreg, $mode; \
teqp tmpreg, $0
#define RESTOREMODE(savereg) \
teqp savereg, $0
#define SAVEIRQS(tmpreg)
#define RESTOREIRQS(tmpreg)
#define DISABLEIRQS(tmpreg)\
teqp pc, $0x08000003
#define ENABLEIRQS(tmpreg)\
teqp pc, $0x00000003
#define USERMODE(tmpreg)\
teqp pc, $0x00000000;\
mov r0, r0
#define SVCMODE(tmpreg)\
teqp pc, $0x00000003;\
mov r0, r0
/*
* Save the current IRQ state and disable IRQs
* Note that this macro assumes FIQs are enabled, and
* that the processor is in SVC mode.
*/
.macro save_and_disable_irqs, oldcpsr, temp
mov \oldcpsr, pc
orr \temp, \oldcpsr, #0x08000000
teqp \temp, #0
.endm
/*
* Restore interrupt state previously stored in
* a register
* ** Actually do nothing on Arc - hope that the caller uses a MOVS PC soon
* after!
*/
.macro restore_irqs, oldcpsr
@ This be restore_irqs
.endm
/*
* These two are used to save LR/restore PC over a user-based access.
* The old 26-bit architecture requires that we save lr (R14)
*/
.macro save_lr
str lr, [sp, #-4]!
.endm
.macro restore_pc
ldmfd sp!, {pc}^
.endm
#define USER(x...) \
9999: x; \
.section __ex_table,"a"; \
.align 3; \
.long 9999b,9001f; \
.previous
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