73 lines
1016 B
ArmAsm
73 lines
1016 B
ArmAsm
/*
|
|
* Copyright (C) 2012 Nobuhiro Iwamatsu <nobuhiro.Iwamatsu.yj@renesas.com>
|
|
* Copyright (C) 2012 Renesas Solutions Corp.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#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:
|
|
#ifdef ICCICR
|
|
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]
|
|
#endif
|
|
|
|
wait_loop:
|
|
.long 0xE320F003 /* 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
|
|
b s_init
|
|
|
|
.pool
|
|
.align 4
|
|
|
|
ENDPROC(lowlevel_init)
|
|
.ltorg
|
|
|
|
MERAM_STACK:
|
|
.word LOW_LEVEL_MERAM_STACK
|