xref: /freebsd-11-stable/sys/arm/arm/support.S

/*-
 * Copyright (c) 2004 Olivier Houchard
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <machine/asm.h>
#include <machine/asmacros.h>
__FBSDID("$FreeBSD: head/sys/arm/arm/support.S 129198 2004-05-14 11:46:45Z cognet $");

#include "assym.s"

ENTRY(casuptr)
	mov	r1, r2
	bl	suword
/*
 * New experimental definitions of IRQdisable and IRQenable
 * These keep FIQ's enabled since FIQ's are special.
 */

#define IRQdisable \
	mrs	r14, cpsr ; \
	orr	r14, r14, #(I32_bit) ; \
	msr	cpsr_c, r14 ; \

#define IRQenable \
	mrs	r14, cpsr ; \
	bic	r14, r14, #(I32_bit) ; \
	msr	cpsr_c, r14 ; \

/*
 * These are used for switching the translation table/DACR.
 * Since the vector page can be invalid for a short time, we must
 * disable both regular IRQs *and* FIQs.
 *
 * XXX: This is not necessary if the vector table is relocated.
 */
#define IRQdisableALL \
	mrs	r14, cpsr ; \
	orr	r14, r14, #(I32_bit) ; \
	msr	cpsr_all, r14

#define IRQenableALL \
	mrs	r14, cpsr ; \
	bic	r14, r14, #(I32_bit) ; \
	msr	cpsr_all, r14

ENTRY(disable_intr)
	IRQdisableALL
ENTRY(enable_intr)
	IRQenableALL