/*      $NetBSD: bcopy_page.S,v 1.7 2003/10/13 21:03:13 scw Exp $       */

/*-
 * Copyright (c) 1995 Scott Stevens
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Scott Stevens.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 *
 * RiscBSD kernel project
 *
 * bcopy_page.S
 *
 * page optimised bcopy and bzero routines
 *
 * Created      : 08/04/95
 */

#include <machine/asm.h>
#include "assym.inc"


/*
 * armv5e version of bcopy_page
 */
ENTRY(bcopy_page)
        pld     [r0]
        stmfd   sp!, {r4, r5}
        _SAVE({r4, r5})
        mov     ip, #32
        ldr     r2, [r0], #0x04         /* 0x00 */
        ldr     r3, [r0], #0x04         /* 0x04 */
1:      pld     [r0, #0x18]             /* Prefetch 0x20 */
        ldr     r4, [r0], #0x04         /* 0x08 */
        ldr     r5, [r0], #0x04         /* 0x0c */
        strd    r2, [r1], #0x08
        ldr     r2, [r0], #0x04         /* 0x10 */
        ldr     r3, [r0], #0x04         /* 0x14 */
        strd    r4, [r1], #0x08
        ldr     r4, [r0], #0x04         /* 0x18 */
        ldr     r5, [r0], #0x04         /* 0x1c */
        strd    r2, [r1], #0x08
        ldr     r2, [r0], #0x04         /* 0x20 */
        ldr     r3, [r0], #0x04         /* 0x24 */
        pld     [r0, #0x18]             /* Prefetch 0x40 */
        strd    r4, [r1], #0x08
        ldr     r4, [r0], #0x04         /* 0x28 */
        ldr     r5, [r0], #0x04         /* 0x2c */
        strd    r2, [r1], #0x08
        ldr     r2, [r0], #0x04         /* 0x30 */
        ldr     r3, [r0], #0x04         /* 0x34 */
        strd    r4, [r1], #0x08
        ldr     r4, [r0], #0x04         /* 0x38 */
        ldr     r5, [r0], #0x04         /* 0x3c */
        strd    r2, [r1], #0x08
        ldr     r2, [r0], #0x04         /* 0x40 */
        ldr     r3, [r0], #0x04         /* 0x44 */
        pld     [r0, #0x18]             /* Prefetch 0x60 */
        strd    r4, [r1], #0x08
        ldr     r4, [r0], #0x04         /* 0x48 */
        ldr     r5, [r0], #0x04         /* 0x4c */
        strd    r2, [r1], #0x08
        ldr     r2, [r0], #0x04         /* 0x50 */
        ldr     r3, [r0], #0x04         /* 0x54 */
        strd    r4, [r1], #0x08
        ldr     r4, [r0], #0x04         /* 0x58 */
        ldr     r5, [r0], #0x04         /* 0x5c */
        strd    r2, [r1], #0x08
        ldr     r2, [r0], #0x04         /* 0x60 */
        ldr     r3, [r0], #0x04         /* 0x64 */
        pld     [r0, #0x18]             /* Prefetch 0x80 */
        strd    r4, [r1], #0x08
        ldr     r4, [r0], #0x04         /* 0x68 */
        ldr     r5, [r0], #0x04         /* 0x6c */
        strd    r2, [r1], #0x08
        ldr     r2, [r0], #0x04         /* 0x70 */
        ldr     r3, [r0], #0x04         /* 0x74 */
        strd    r4, [r1], #0x08
        ldr     r4, [r0], #0x04         /* 0x78 */
        ldr     r5, [r0], #0x04         /* 0x7c */
        strd    r2, [r1], #0x08
        subs    ip, ip, #0x01
        ldrgt   r2, [r0], #0x04         /* 0x80 */
        ldrgt   r3, [r0], #0x04         /* 0x84 */
        strd    r4, [r1], #0x08
        bgt     1b
        ldmfd   sp!, {r4, r5}
        RET
END(bcopy_page)

/*
 * armv5e version of bzero_page
 */
ENTRY(bzero_page)
        mov     r1, #PAGE_SIZE
        mov     r2, #0
        mov     r3, #0
1:      strd    r2, [r0], #8            /* 32 */
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        strd    r2, [r0], #8            /* 64 */
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        strd    r2, [r0], #8            /* 96 */
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        strd    r2, [r0], #8            /* 128 */
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        strd    r2, [r0], #8
        subs    r1, r1, #128
        bne     1b
        RET
END(bzero_page)