mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 05:04:26 +00:00
0aee53bacc
SMDK5250 board is based on Samsungs EXYNOS5250 SoC. Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
96 lines
2.3 KiB
ArmAsm
96 lines
2.3 KiB
ArmAsm
/*
|
|
* Lowlevel setup for SMDK5250 board based on S5PC520
|
|
*
|
|
* Copyright (C) 2012 Samsung Electronics
|
|
*
|
|
* 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 <version.h>
|
|
#include <asm/arch/cpu.h>
|
|
|
|
_TEXT_BASE:
|
|
.word CONFIG_SYS_TEXT_BASE
|
|
|
|
.globl lowlevel_init
|
|
lowlevel_init:
|
|
|
|
/* use iRAM stack in bl2 */
|
|
ldr sp, =CONFIG_IRAM_STACK
|
|
stmdb r13!, {ip,lr}
|
|
|
|
/* check reset status */
|
|
ldr r0, =(EXYNOS5_POWER_BASE + INFORM1_OFFSET)
|
|
ldr r1, [r0]
|
|
|
|
/* AFTR wakeup reset */
|
|
ldr r2, =S5P_CHECK_DIDLE
|
|
cmp r1, r2
|
|
beq exit_wakeup
|
|
|
|
/* LPA wakeup reset */
|
|
ldr r2, =S5P_CHECK_LPA
|
|
cmp r1, r2
|
|
beq exit_wakeup
|
|
|
|
/* Sleep wakeup reset */
|
|
ldr r2, =S5P_CHECK_SLEEP
|
|
cmp r1, r2
|
|
beq wakeup_reset
|
|
|
|
/*
|
|
* If U-boot is already running in RAM, no need to relocate U-Boot.
|
|
* Memory controller must be configured before relocating U-Boot
|
|
* in ram.
|
|
*/
|
|
ldr r0, =0x0ffffff /* r0 <- Mask Bits*/
|
|
bic r1, pc, r0 /* pc <- current addr of code */
|
|
/* r1 <- unmasked bits of pc */
|
|
ldr r2, _TEXT_BASE /* r2 <- original base addr in ram */
|
|
bic r2, r2, r0 /* r2 <- unmasked bits of r2*/
|
|
cmp r1, r2 /* compare r1, r2 */
|
|
beq 1f /* r0 == r1 then skip sdram init */
|
|
|
|
/* init system clock */
|
|
bl system_clock_init
|
|
|
|
/* Memory initialize */
|
|
bl mem_ctrl_init
|
|
|
|
1:
|
|
bl tzpc_init
|
|
ldmia r13!, {ip,pc}
|
|
|
|
wakeup_reset:
|
|
bl system_clock_init
|
|
bl mem_ctrl_init
|
|
bl tzpc_init
|
|
|
|
exit_wakeup:
|
|
/* Load return address and jump to kernel */
|
|
ldr r0, =(EXYNOS5_POWER_BASE + INFORM0_OFFSET)
|
|
|
|
/* r1 = physical address of exynos5_cpu_resume function*/
|
|
ldr r1, [r0]
|
|
|
|
/* Jump to kernel */
|
|
mov pc, r1
|
|
nop
|
|
nop
|