summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-s3c/sleep-s3c64xx.S
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-s3c/sleep-s3c64xx.S
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-s3c/sleep-s3c64xx.S')
-rw-r--r--arch/arm/mach-s3c/sleep-s3c64xx.S42
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c/sleep-s3c64xx.S b/arch/arm/mach-s3c/sleep-s3c64xx.S
new file mode 100644
index 0000000000..908aa76b10
--- /dev/null
+++ b/arch/arm/mach-s3c/sleep-s3c64xx.S
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* linux/arch/arm/plat-s3c64xx/sleep.S
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX CPU sleep code
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include "map.h"
+
+#undef S3C64XX_VA_GPIO
+#define S3C64XX_VA_GPIO (0x0)
+
+#include "regs-gpio.h"
+
+#define LL_UART (S3C_PA_UART + (0x400 * CONFIG_S3C_LOWLEVEL_UART_PORT))
+
+ .text
+
+ /* Sleep magic, the word before the resume entry point so that the
+ * bootloader can check for a resumeable image. */
+
+ .word 0x2bedf00d
+
+ /* s3c_cpu_reusme
+ *
+ * This is the entry point, stored by whatever method the bootloader
+ * requires to get the kernel runnign again. This code expects to be
+ * entered with no caches live and the MMU disabled. It will then
+ * restore the MMU and other basic CP registers saved and restart
+ * the kernel C code to finish the resume code.
+ */
+
+ENTRY(s3c_cpu_resume)
+ msr cpsr_c, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
+ ldr r2, =LL_UART /* for debug */
+ b cpu_resume