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/*
* Copyright (C) 2012 Nobuhiro Iwamatsu <nobuhiro.Iwamatsu.yj@renesas.com>
* Copyright (C) 2012 Renesas Solutions Corp.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <linux/linkage.h>
ENTRY(lowlevel_init)
ldr r0, =MERAM_BASE
mov r1, #0x0
str r1, [r0]
mrc p15, 0, r0, c0, c0, 5
ands r0, r0, #0xF
beq lowlevel_init__
b wait_interrupt
.pool
.align 4
wait_interrupt:
ldr r1, =ICCICR
mov r2, #0x0
str r2, [r1]
mov r2, #0xF0
adds r1, r1, #4 /* ICCPMR */
str r2, [r1]
ldr r1, =ICCICR
mov r2, #0x1
str r2, [r1]
wait_loop:
wfi
ldr r2, [r1, #0xC]
str r2, [r1, #0x10]
ldr r0, =MERAM_BASE
ldr r2, [r0]
cmp r2, #0
movne pc, r2
b wait_loop
wait_loop_end:
.pool
.align 4
lowlevel_init__:
mov r0, #0x200000
loop0:
subs r0, r0, #1
bne loop0
ldr sp, MERAM_STACK
str ip, [sp] /* stash old link register */
mov ip, lr /* save link reg across call */
bl s_init
ldr ip, [sp] /* restore save ip */
mov lr, ip /* restore link reg */
/* back to arch calling code */
mov pc, lr
.pool
.align 4
ENDPROC(lowlevel_init)
.ltorg
MERAM_STACK:
.word LOW_LEVEL_MERAM_STACK
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