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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Copyright (C) 2015 Imagination Technologies
- * Author: Paul Burton <[email protected]>
- */
- #include <asm/bcache.h>
- #include <asm/debug.h>
- #include <linux/uaccess.h>
- #include <linux/debugfs.h>
- #include <linux/init.h>
- static ssize_t sc_prefetch_read(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- bool enabled = bc_prefetch_is_enabled();
- char buf[3];
- buf[0] = enabled ? 'Y' : 'N';
- buf[1] = '\n';
- buf[2] = 0;
- return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
- }
- static ssize_t sc_prefetch_write(struct file *file,
- const char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- bool enabled;
- int err;
- err = kstrtobool_from_user(user_buf, count, &enabled);
- if (err)
- return err;
- if (enabled)
- bc_prefetch_enable();
- else
- bc_prefetch_disable();
- return count;
- }
- static const struct file_operations sc_prefetch_fops = {
- .open = simple_open,
- .llseek = default_llseek,
- .read = sc_prefetch_read,
- .write = sc_prefetch_write,
- };
- static int __init sc_debugfs_init(void)
- {
- struct dentry *dir;
- dir = debugfs_create_dir("l2cache", mips_debugfs_dir);
- debugfs_create_file("prefetch", S_IRUGO | S_IWUSR, dir, NULL,
- &sc_prefetch_fops);
- return 0;
- }
- late_initcall(sc_debugfs_init);
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