1 files changed, 89 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/dscr/dscr.h b/tools/testing/selftests/powerpc/dscr/dscr.h
new file mode 100644
index 0000000000..b281659071
--- /dev/null
+++ b/tools/testing/selftests/powerpc/dscr/dscr.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * POWER Data Stream Control Register (DSCR)
+ *
+ * This header file contains helper functions and macros
+ * required for all the DSCR related test cases.
+ *
+ * Copyright 2012, Anton Blanchard, IBM Corporation.
+ * Copyright 2015, Anshuman Khandual, IBM Corporation.
+ */
+#ifndef _SELFTESTS_POWERPC_DSCR_DSCR_H
+#define _SELFTESTS_POWERPC_DSCR_DSCR_H
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <pthread.h>
+#include <sched.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include "reg.h"
+#include "utils.h"
+
+#define THREADS		100	/* Max threads */
+#define COUNT		100	/* Max iterations */
+#define DSCR_MAX	16	/* Max DSCR value */
+#define LEN_MAX		100	/* Max name length */
+
+#define DSCR_DEFAULT	"/sys/devices/system/cpu/dscr_default"
+#define CPU_PATH	"/sys/devices/system/cpu/"
+
+#define rmb()  asm volatile("lwsync":::"memory")
+#define wmb()  asm volatile("lwsync":::"memory")
+
+#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
+
+/* Prilvilege state DSCR access */
+inline unsigned long get_dscr(void)
+{
+	return mfspr(SPRN_DSCR_PRIV);
+}
+
+inline void set_dscr(unsigned long val)
+{
+	mtspr(SPRN_DSCR_PRIV, val);
+}
+
+/* Problem state DSCR access */
+inline unsigned long get_dscr_usr(void)
+{
+	return mfspr(SPRN_DSCR);
+}
+
+inline void set_dscr_usr(unsigned long val)
+{
+	mtspr(SPRN_DSCR, val);
+}
+
+/* Default DSCR access */
+unsigned long get_default_dscr(void)
+{
+	int err;
+	unsigned long val;
+
+	err = read_ulong(DSCR_DEFAULT, &val, 16);
+	if (err) {
+		perror("read() failed");
+		exit(1);
+	}
+	return val;
+}
+
+void set_default_dscr(unsigned long val)
+{
+	int err;
+
+	err = write_ulong(DSCR_DEFAULT, val, 16);
+	if (err) {
+		perror("write() failed");
+		exit(1);
+	}
+}
+
+#endif	/* _SELFTESTS_POWERPC_DSCR_DSCR_H */