Mike Frysinger | 459249a | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 1 | /* |
| 2 | * arch/blackfin/kernel/kgdb_test.c - Blackfin kgdb tests |
| 3 | * |
| 4 | * Copyright 2005-2008 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/proc_fs.h> |
| 13 | |
| 14 | #include <asm/current.h> |
| 15 | #include <asm/uaccess.h> |
| 16 | #include <asm/system.h> |
| 17 | |
| 18 | #include <asm/blackfin.h> |
| 19 | |
| 20 | static char cmdline[256]; |
| 21 | static unsigned long len; |
| 22 | |
Sonic Zhang | 0bf3d93 | 2009-03-05 16:44:53 +0800 | [diff] [blame] | 23 | #ifndef CONFIG_SMP |
Mike Frysinger | 459249a | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 24 | static int num1 __attribute__((l1_data)); |
| 25 | |
| 26 | void kgdb_l1_test(void) __attribute__((l1_text)); |
| 27 | |
| 28 | void kgdb_l1_test(void) |
| 29 | { |
| 30 | printk(KERN_ALERT "L1(before change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); |
| 31 | printk(KERN_ALERT "L1 : code function addr = 0x%p\n", kgdb_l1_test); |
| 32 | num1 = num1 + 10 ; |
| 33 | printk(KERN_ALERT "L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1); |
| 34 | return ; |
| 35 | } |
Sonic Zhang | 0bf3d93 | 2009-03-05 16:44:53 +0800 | [diff] [blame] | 36 | #endif |
| 37 | |
Mike Frysinger | 459249a | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 38 | #if L2_LENGTH |
| 39 | |
| 40 | static int num2 __attribute__((l2)); |
| 41 | void kgdb_l2_test(void) __attribute__((l2)); |
| 42 | |
| 43 | void kgdb_l2_test(void) |
| 44 | { |
| 45 | printk(KERN_ALERT "L2(before change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); |
| 46 | printk(KERN_ALERT "L2 : code function addr = 0x%p\n", kgdb_l2_test); |
| 47 | num2 = num2 + 20 ; |
| 48 | printk(KERN_ALERT "L2(after change) : data variable addr = 0x%p, data value is %d\n", &num2, num2); |
| 49 | return ; |
| 50 | } |
| 51 | |
| 52 | #endif |
| 53 | |
| 54 | |
| 55 | int kgdb_test(char *name, int len, int count, int z) |
| 56 | { |
| 57 | printk(KERN_DEBUG "kgdb name(%d): %s, %d, %d\n", len, name, count, z); |
| 58 | count = z; |
| 59 | return count; |
| 60 | } |
| 61 | |
| 62 | static int test_proc_output(char *buf) |
| 63 | { |
| 64 | kgdb_test("hello world!", 12, 0x55, 0x10); |
Sonic Zhang | 0bf3d93 | 2009-03-05 16:44:53 +0800 | [diff] [blame] | 65 | #ifndef CONFIG_SMP |
Mike Frysinger | 459249a | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 66 | kgdb_l1_test(); |
Sonic Zhang | 0bf3d93 | 2009-03-05 16:44:53 +0800 | [diff] [blame] | 67 | #endif |
| 68 | #if L2_LENGTH |
Mike Frysinger | 459249a | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 69 | kgdb_l2_test(); |
Sonic Zhang | 0bf3d93 | 2009-03-05 16:44:53 +0800 | [diff] [blame] | 70 | #endif |
Mike Frysinger | 459249a | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static int test_read_proc(char *page, char **start, off_t off, |
| 76 | int count, int *eof, void *data) |
| 77 | { |
| 78 | int len; |
| 79 | |
| 80 | len = test_proc_output(page); |
| 81 | if (len <= off+count) |
| 82 | *eof = 1; |
| 83 | *start = page + off; |
| 84 | len -= off; |
| 85 | if (len > count) |
| 86 | len = count; |
| 87 | if (len < 0) |
| 88 | len = 0; |
| 89 | return len; |
| 90 | } |
| 91 | |
| 92 | static int test_write_proc(struct file *file, const char *buffer, |
| 93 | unsigned long count, void *data) |
| 94 | { |
| 95 | if (count >= 256) |
| 96 | len = 255; |
| 97 | else |
| 98 | len = count; |
| 99 | |
| 100 | memcpy(cmdline, buffer, count); |
| 101 | cmdline[len] = 0; |
| 102 | |
| 103 | return len; |
| 104 | } |
| 105 | |
| 106 | static int __init kgdbtest_init(void) |
| 107 | { |
| 108 | struct proc_dir_entry *entry; |
| 109 | |
| 110 | entry = create_proc_entry("kgdbtest", 0, NULL); |
| 111 | if (entry == NULL) |
| 112 | return -ENOMEM; |
| 113 | |
| 114 | entry->read_proc = test_read_proc; |
| 115 | entry->write_proc = test_write_proc; |
| 116 | entry->data = NULL; |
| 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | static void __exit kgdbtest_exit(void) |
| 122 | { |
| 123 | remove_proc_entry("kgdbtest", NULL); |
| 124 | } |
| 125 | |
| 126 | module_init(kgdbtest_init); |
| 127 | module_exit(kgdbtest_exit); |
| 128 | MODULE_LICENSE("GPL"); |