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arch/armv7-r/gcc/arm_fullcontextrestore.S

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+/*
+ * arm_fullcontextrestore.S
+ *
+ * Copyright (c) 2022 Semidrive Semiconductor.
+ * All rights reserved.
+ *
+ * Description: ARM full context restore.
+ *
+ * Revision History:
+ * -----------------
+ */
+
+#include <config.h>
+#include <compiler.h>
+#include <armv7-r/svcall.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+	.text
+
+/****************************************************************************
+ * Name: arm_fullcontextrestore
+ ****************************************************************************/
+
+	.globl	arm_fullcontextrestore
+	.type	arm_fullcontextrestore, function
+
+arm_fullcontextrestore:
+
+	cps		#0x1F						/* Enter sys mode */
+
+	/* Perform the System call with R0=1 and R1=regs */
+
+	mov		r1, r0						/* R1: regs */
+	mov		r0, #SYS_restore_context	/* R0: restore context */
+	svc		0							/* Force synchronous SVCall (or Hard Fault) */
+
+	/* This call should not return */
+
+	bx		lr							/* Unnecessary ... will not return */
+	.size	arm_fullcontextrestore, .-arm_fullcontextrestore
+	.end