ARM: S3C24XX: move common power-management code to mach-s3c24xx

This is the basic power-management code used by all s3c24xx machines.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c24xx/sleep.S b/arch/arm/mach-s3c24xx/sleep.S
new file mode 100644
index 000000000000..c56612569b40
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/sleep.S
@@ -0,0 +1,84 @@
+/* linux/arch/arm/plat-s3c24xx/sleep.S
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 Power Manager (Suspend-To-RAM) support
+ *
+ * Based on PXA/SA1100 sleep code by:
+ *	Nicolas Pitre, (c) 2002 Monta Vista Software Inc
+ *	Cliff Brake, (c) 2001
+ *
+ * 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 <linux/linkage.h>
+#include <asm/assembler.h>
+#include <mach/hardware.h>
+#include <mach/map.h>
+
+#include <mach/regs-gpio.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-mem.h>
+#include <plat/regs-serial.h>
+
+/* CONFIG_DEBUG_RESUME is dangerous if your bootloader does not
+ * reset the UART configuration, only enable if you really need this!
+*/
+//#define CONFIG_DEBUG_RESUME
+
+	.text
+
+	/* sleep magic, to allow the bootloader to check for an valid
+	 * image to resume to. Must be the first word before the
+	 * s3c_cpu_resume entry.
+	*/
+
+	.word	0x2bedf00d
+
+	/* s3c_cpu_resume
+	 *
+	 * resume code entry for bootloader to call
+	*/
+
+ENTRY(s3c_cpu_resume)
+	mov	r0, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
+	msr	cpsr_c, r0
+
+	@@ load UART to allow us to print the two characters for
+	@@ resume debug
+
+	mov	r2, #S3C24XX_PA_UART & 0xff000000
+	orr	r2, r2, #S3C24XX_PA_UART & 0xff000
+
+#if 0
+	/* SMDK2440 LED set */
+	mov	r14, #S3C24XX_PA_GPIO
+	ldr	r12, [ r14, #0x54 ]
+	bic	r12, r12, #3<<4
+	orr	r12, r12, #1<<7
+	str	r12, [ r14, #0x54 ]
+#endif
+
+#ifdef CONFIG_DEBUG_RESUME
+	mov	r3, #'L'
+	strb	r3, [ r2, #S3C2410_UTXH ]
+1001:
+	ldrb	r14, [ r3, #S3C2410_UTRSTAT ]
+	tst	r14, #S3C2410_UTRSTAT_TXE
+	beq	1001b
+#endif /* CONFIG_DEBUG_RESUME */
+
+	b	cpu_resume