/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1995-1997, by Sun Microsystems, Inc.
 * All rights reserved.
 */

        .file   "sync_instruction_memory.s"

#include <sys/asm_linkage.h>

/*
 * void sync_instruction_memory(caddr_t addr, int len)
 *
 * Make the memory at {addr, addr+len} valid for instruction execution.
 */

#ifdef lint
#define nop
void
sync_instruction_memory(caddr_t addr, int len)
{
        caddr_t end = addr + len;
        caddr_t start = addr & ~7;
        for (; start < end; start += 8)
                flush(start);
        nop; nop; nop; nop; nop;
        return;
}
#else
        ENTRY(sync_instruction_memory)
        add     %o0, %o1, %o2
        andn    %o0, 7, %o0

        cmp     %o0, %o2
        bgeu    2f
        nop
        flush   %o0
1:
        add     %o0, 8, %o0
        cmp     %o0, %o2
        blu,a   1b
        flush   %o0
        !
        ! when we get here, we have executed 3 instructions after the
        ! last flush; SPARC V8 requires 2 more for flush to be visible
        ! The retl;nop pair will do it.
        !
2:
        retl
        clr     %o0
        SET_SIZE(sync_instruction_memory)

        ENTRY(nop)
        retl
        nop
        SET_SIZE(nop)
#endif