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/*

 *  linux/asm-arm/proc-armv/assembler.h

 *

 *  Copyright (C) 1996-2000 Russell King

 *

 * 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 file contains ARM processor specifics for

 *  the ARM6 and better processors.

 */

#define MODE_USR        USR_MODE

#define MODE_FIQ        FIQ_MODE

#define MODE_IRQ        IRQ_MODE

#define MODE_SVC        SVC_MODE

#define DEFAULT_FIQ     MODE_FIQ

/*

 * LOADREGS - ldm with PC in register list (eg, ldmfd sp!, {pc})

 */

#ifdef __STDC__

#define LOADREGS(cond, base, reglist...)\

        ldm##cond       base,reglist

#else

#define LOADREGS(cond, base, reglist...)\

        ldm/**/cond     base,reglist

#endif

/*

 * Build a return instruction for this processor type.

 */

#define RETINSTR(instr, regs...)\

        instr   regs

/*

 * 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

        mrs     \oldcpsr, cpsr

        mov     \temp, #I_BIT | MODE_SVC

        msr     cpsr_c, \temp

        .endm

/*

 * Restore interrupt state previously stored in a register.  We don't

 * guarantee that this will preserve the flags.

 */

        .macro  restore_irqs, oldcpsr

        msr     cpsr_c, \oldcpsr

        .endm

/*

 * These two are used to save LR/restore PC over a user-based access.

 * The old 26-bit architecture requires that we do.  On 32-bit

 * architecture, we can safely ignore this requirement.

 */

        .macro  save_lr

        .endm

        .macro  restore_pc

        mov     pc, lr

        .endm

#define USER(x...)                              \

9999:   x;                                      \

        .section __ex_table,"a";                \

        .align  3;                              \

        .long   9999b,9001f;                    \

        .previous