source: mainline/boot/arch/ia64/src/asm.S@ ba8d2987

#
# Copyright (c) 2006 Martin Decky
# Copyright (c) 2006 Jakub Jermar 
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - 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.
# - 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
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

#include <arch/arch.h>

.text

.global halt
.global memcpy
.global jump_to_kernel

halt:
        br halt

memcpy:
        alloc loc0 = ar.pfs, 3, 1, 0, 0

        adds r14 = 7, in1
        mov r2 = ar.lc
        mov r8 = in0 ;;
        and r14 = -8, r14 ;;
        cmp.ne p6, p7 = r14, in1
(p7)    br.cond.dpnt 3f ;;
0:
        cmp.ne p6, p7 = 0, in2
(p7)    br.cond.dpnt 2f ;;
(p6)    adds r14 = -1, in2
(p6)    mov r16 = r0
(p6)    mov r17 = r0 ;;
(p6)    mov ar.lc = r14
1:
        add r14 = r16, in1 
        add r15 = r16, in0
        adds r17 = 1, r17 ;;
        ld1 r14 = [r14]
        mov r16 = r17 ;;
        st1 [r15] = r14
        br.cloop.sptk.few 1b ;;
2:
        mov ar.lc = r2
        mov ar.pfs = loc0
        br.ret.sptk.many rp
3:
        adds r14 = 7, in0 ;;
        and r14 = -8, r14 ;;
        cmp.eq p6, p7 = r14, in0
(p7)    br.cond.dptk 0b
        shr.u r18 = in2, 3 ;;
        cmp.ne p6, p7 = 0, r18
(p7)    br.cond.dpnt 5f ;;
(p6)    adds r14 = -1, r18
(p6)    mov r16 = r0
(p6)    mov r17 = r0 ;;
(p6)    mov ar.lc = r14
4:
        shladd r14 = r16, 3, r0
        adds r16 = 1, r17 ;;
        add r15 = in1, r14
        add r14 = in0, r14
        mov r17 = r16 ;;
        ld8 r15 = [r15] ;;
        st8 [r14] = r15
        br.cloop.sptk.few 4b
5:
        and r15 = 7, in2
        shladd r14 = r18, 3, r0
        mov r16 = r0
        mov r18 = r0 ;;
        cmp.eq p6, p7 = 0, r15
        add in0 = r14, in0
        adds r15 = -1, r15
        add r17 = r14, in1 
(p6)    br.cond.dpnt 2b ;;
        mov ar.lc = r15
6:
        add r14 = r16, r17
        add r15 = r16, in0
        adds r16 = 1, r18 ;;
        ld1 r14 = [r14]
        mov r18 = r16 ;;
        st1 [r15] = r14
        br.cloop.sptk.few 6b ;;
        mov ar.lc = r2
        mov ar.pfs = loc0
        br.ret.sptk.many rp

jump_to_kernel:
        alloc loc0 = ar.pfs, 1, 1, 0, 0
        mov r1 = in0 ;;                 # Pass bootinfo address
        movl r8 = KERNEL_ADDRESS;;
        mov b1 = r8 ;;
        br.call.sptk.many b0 = b1;;