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/*
* 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");
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