1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/misc/fsl_cache.c b/drivers/misc/fsl_cache.c
new file mode 100644
index 000000000000..3101aef60833
--- /dev/null
+++ b/drivers/misc/fsl_cache.c
@@ -0,0 +1,85 @@
+/*
+ * fsl_cache.c  --  freescale cache driver
+ *
+ * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/fsl_cache.h>
+
+#include <asm/cacheflush.h>
+
+
+static int fsl_cache_ioctl(struct inode *ip, struct file *fp,
+			   unsigned int cmd, unsigned long arg)
+{
+	struct fsl_cache_addr addr;
+	if (copy_from_user(&addr, (void __user *)arg,
+			sizeof(struct fsl_cache_addr))) {
+		printk(KERN_ERR "fsl_cache_ioctl failed!\n");
+		return -EFAULT;
+	}
+
+	if (addr.start <= 0 || addr.end <= addr.start)
+		return -EINVAL;
+
+	switch (cmd) {
+	case FSLCACHE_IOCINV:
+		dmac_inv_range(addr.start, addr.end);
+		break;
+	case FSLCACHE_IOCCLEAN:
+		dmac_clean_range(addr.start, addr.end);
+		break;
+	case FSLCACHE_IOCFLUSH:
+		dmac_flush_range(addr.start, addr.end);
+		break;
+	default:
+		printk(KERN_ERR "fsl_cache ioctl: error cmd!\n");
+		return -1;
+	}
+	return 0;
+}
+
+static const struct file_operations misc_fops = {
+	.ioctl	= fsl_cache_ioctl,
+};
+
+static struct miscdevice fsl_cache_device  = {
+	.minor	= MISC_DYNAMIC_MINOR,
+	.name	= "fsl_cache",
+	.fops	= &misc_fops,
+};
+
+static int __init fsl_cache_init(void)
+{
+	int error;
+
+	error = misc_register(&fsl_cache_device);
+	if (error) {
+		printk(KERN_ERR "fsl_cache: misc_register failed!\n");
+		return error;
+	}
+	return 0;
+}
+
+static void __exit fsl_cache_exit(void)
+{
+	misc_deregister(&fsl_cache_device);
+}
+
+module_init(fsl_cache_init);
+module_exit(fsl_cache_exit);
+
+MODULE_DESCRIPTION("Freescale cache manipulation driver");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_LICENSE("GPL");