Blackfin arch: merge kgdb test code using common CONFIG_KGDB_TESTS

[Grace Pan <grace.pan@analog.com>: Add case for kgdb test in l1 and l2]

Signed-off-by: Grace Pan <grace.pan@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

3 files changed, 131 insertions, 1 deletions

diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug
index bfd712ab125c..c8ff41eebc98 100644
--- a/arch/blackfin/Kconfig.debug
+++ b/arch/blackfin/Kconfig.debug
@@ -19,7 +19,13 @@ config DEBUG_STACK_USAGE
           This option will slow down process creation somewhat.
 
 config HAVE_ARCH_KGDB
-       def_bool y
+        def_bool y
+
+config KGDB_TESTCASE
+        tristate "KGDB: for test case in expect"
+        default n
+        help
+          This is a kgdb test case for automated testing.
 
 config DEBUG_VERBOSE
         bool "Verbose fault messages"
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile
index 01a60ca69216..f0902c120dc2 100644
--- a/arch/blackfin/kernel/Makefile
+++ b/arch/blackfin/kernel/Makefile
@@ -19,4 +19,5 @@ obj-$(CONFIG_BFIN_GPTIMERS)          += gptimers.o
 obj-$(CONFIG_CPLB_INFO)              += cplbinfo.o
 obj-$(CONFIG_MODULES)                += module.o
 obj-$(CONFIG_KGDB)                   += kgdb.o
+obj-$(CONFIG_KGDB_TESTCASE)          += kgdb_test.o
 obj-$(CONFIG_EARLY_PRINTK)           += early_printk.o
diff --git a/arch/blackfin/kernel/kgdb_test.c b/arch/blackfin/kernel/kgdb_test.c
new file mode 100644
index 000000000000..3dba9c17304a
--- /dev/null
+++ b/arch/blackfin/kernel/kgdb_test.c
@@ -0,0 +1,123 @@
+/*
+ * 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/system.h>
+
+#include <asm/blackfin.h>
+
+static char cmdline[256];
+static unsigned long len;
+
+static int num1 __attribute__((l1_data));
+
+void kgdb_l1_test(void) __attribute__((l1_text));
+
+void kgdb_l1_test(void)
+{
+        printk(KERN_ALERT "L1(before change) : data variable addr = 0x%p, data value is %d\n", &num1, num1);
+        printk(KERN_ALERT "L1 : code function addr = 0x%p\n", kgdb_l1_test);
+        num1 = num1 + 10 ;
+        printk(KERN_ALERT "L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1);
+        return ;
+}
+#if L2_LENGTH
+
+static int num2 __attribute__((l2));
+void kgdb_l2_test(void) __attribute__((l2));
+
+void kgdb_l2_test(void)
+{
+        printk(KERN_ALERT "L2(before change) : data variable addr = 0x%p, data value is %d\n", &num2, num2);
+        printk(KERN_ALERT "L2 : code function addr = 0x%p\n", kgdb_l2_test);
+        num2 = num2 + 20 ;
+        printk(KERN_ALERT "L2(after change) : data variable addr = 0x%p, data value is %d\n", &num2, num2);
+        return ;
+}
+
+#endif
+
+
+int kgdb_test(char *name, int len, int count, int z)
+{
+        printk(KERN_DEBUG "kgdb name(%d): %s, %d, %d\n", len, name, count, z);
+        count = z;
+        return count;
+}
+
+static int test_proc_output(char *buf)
+{
+        kgdb_test("hello world!", 12, 0x55, 0x10);
+        kgdb_l1_test();
+        #if L2_LENGTH
+        kgdb_l2_test();
+        #endif
+
+        return 0;
+}
+
+static int test_read_proc(char *page, char **start, off_t off,
+                                 int count, int *eof, void *data)
+{
+        int len;
+
+        len = test_proc_output(page);
+        if (len <= off+count)
+                *eof = 1;
+        *start = page + off;
+        len -= off;
+        if (len > count)
+                len = count;
+        if (len < 0)
+                len = 0;
+        return len;
+}
+
+static int test_write_proc(struct file *file, const char *buffer,
+                                 unsigned long count, void *data)
+{
+        if (count >= 256)
+                len = 255;
+        else
+                len = count;
+
+        memcpy(cmdline, buffer, count);
+        cmdline[len] = 0;
+
+        return len;
+}
+
+static int __init kgdbtest_init(void)
+{
+        struct proc_dir_entry *entry;
+
+        entry = create_proc_entry("kgdbtest", 0, NULL);
+        if (entry == NULL)
+                return -ENOMEM;
+
+        entry->read_proc = test_read_proc;
+        entry->write_proc = test_write_proc;
+        entry->data = NULL;
+
+        return 0;
+}
+
+static void __exit kgdbtest_exit(void)
+{
+        remove_proc_entry("kgdbtest", NULL);
+}
+
+module_init(kgdbtest_init);
+module_exit(kgdbtest_exit);
+MODULE_LICENSE("GPL");