You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
2.0 KiB
106 lines
2.0 KiB
/*
|
|
* 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
|
|
|
|
|
|
|