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