From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/blackfin/kernel/kgdb_test.c | 114 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 arch/blackfin/kernel/kgdb_test.c

(limited to 'arch/blackfin/kernel/kgdb_test.c')

diff --git a/arch/blackfin/kernel/kgdb_test.c b/arch/blackfin/kernel/kgdb_test.c
new file mode 100644
index 000000000..18ab004ae
--- /dev/null
+++ b/arch/blackfin/kernel/kgdb_test.c
@@ -0,0 +1,114 @@
+/*
+ * arch/blackfin/kernel/kgdb_test.c - Blackfin kgdb tests
+ *
+ * Copyright 2005-2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+
+#include <asm/current.h>
+#include <asm/uaccess.h>
+
+#include <asm/blackfin.h>
+
+/* Symbols are here for kgdb test to poke directly */
+static char cmdline[256];
+static size_t len;
+
+#ifndef CONFIG_SMP
+static int num1 __attribute__((l1_data));
+
+void kgdb_l1_test(void) __attribute__((l1_text));
+
+void kgdb_l1_test(void)
+{
+	pr_alert("L1(before change) : data variable addr = 0x%p, data value is %d\n", &num1, num1);
+	pr_alert("L1 : code function addr = 0x%p\n", kgdb_l1_test);
+	num1 = num1 + 10;
+	pr_alert("L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1);
+}
+#endif
+
+#if L2_LENGTH
+
+static int num2 __attribute__((l2));
+void kgdb_l2_test(void) __attribute__((l2));
+
+void kgdb_l2_test(void)
+{
+	pr_alert("L2(before change) : data variable addr = 0x%p, data value is %d\n", &num2, num2);
+	pr_alert("L2 : code function addr = 0x%p\n", kgdb_l2_test);
+	num2 = num2 + 20;
+	pr_alert("L2(after change) : data variable addr = 0x%p, data value is %d\n", &num2, num2);
+}
+
+#endif
+
+noinline int kgdb_test(char *name, int len, int count, int z)
+{
+	pr_alert("kgdb name(%d): %s, %d, %d\n", len, name, count, z);
+	count = z;
+	return count;
+}
+
+static ssize_t
+kgdb_test_proc_read(struct file *file, char __user *buf,
+                    size_t count, loff_t *ppos)
+{
+	kgdb_test("hello world!", 12, 0x55, 0x10);
+#ifndef CONFIG_SMP
+	kgdb_l1_test();
+#endif
+#if L2_LENGTH
+	kgdb_l2_test();
+#endif
+
+	return 0;
+}
+
+static ssize_t
+kgdb_test_proc_write(struct file *file, const char __user *buffer,
+                     size_t count, loff_t *pos)
+{
+	len = min_t(size_t, 255, count);
+	memcpy(cmdline, buffer, count);
+	cmdline[len] = 0;
+
+	return len;
+}
+
+static const struct file_operations kgdb_test_proc_fops = {
+	.owner = THIS_MODULE,
+	.read  = kgdb_test_proc_read,
+	.write = kgdb_test_proc_write,
+	.llseek = noop_llseek,
+};
+
+static int __init kgdbtest_init(void)
+{
+	struct proc_dir_entry *entry;
+
+#if L2_LENGTH
+	num2 = 0;
+#endif
+
+	entry = proc_create("kgdbtest", 0, NULL, &kgdb_test_proc_fops);
+	if (entry == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void __exit kgdbtest_exit(void)
+{
+	remove_proc_entry("kgdbtest", NULL);
+}
+
+module_init(kgdbtest_init);
+module_exit(kgdbtest_exit);
+MODULE_LICENSE("GPL");
-- 
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