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arch/armv7-r/gcc/arm_switchcontext.S

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+/*
+ * arm_switchcontext.S
+ *
+ * Copyright (c) 2022 Semidrive Semiconductor.
+ * All rights reserved.
+ *
+ * Description: ARM switch context.
+ *
+ * Revision History:
+ * -----------------
+ */
+
+#include <config.h>
+#include <compiler.h>
+#include <armv7-r/svcall.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+	.text
+
+/****************************************************************************
+ * Name: arm_switchcontext
+ ****************************************************************************/
+
+	.globl	arm_switchcontext
+	.type	arm_switchcontext, function
+
+arm_switchcontext:
+
+	/* Perform the System call with R0=2 */
+
+	mov		r0, #SYS_switch_context	/* R0: context switch */
+	svc		0						/* Force synchronous SVCall (or Hard Fault) */
+
+	/* We will get here only after the rerturn from the context switch */
+
+	bx		lr
+
+	.size	arm_switchcontext, .-arm_switchcontext
+	.end