1 files changed, 96 insertions, 0 deletions
diff --git a/board/samsung/smdk5250/lowlevel_init.S b/board/samsung/smdk5250/lowlevel_init.S
new file mode 100644
index 0000000000..bc6cb6f738
--- /dev/null
+++ b/board/samsung/smdk5250/lowlevel_init.S
@@ -0,0 +1,96 @@
+/*
+ * 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