133 lines
3.0 KiB
C
133 lines
3.0 KiB
C
|
/*
|
||
|
|
* debugfs ops for the L1 cache
|
||
|
|
*
|
||
|
|
* Copyright (C) 2006 Paul Mundt
|
||
|
|
*
|
||
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
* License. See the file "COPYING" in the main directory of this archive
|
||
|
|
* for more details.
|
||
|
|
*/
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/debugfs.h>
|
||
|
|
#include <linux/seq_file.h>
|
||
|
|
#include <asm/processor.h>
|
||
|
|
#include <asm/uaccess.h>
|
||
|
|
#include <asm/cache.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
enum cache_type {
|
||
|
|
CACHE_TYPE_ICACHE,
|
||
|
|
CACHE_TYPE_DCACHE,
|
||
|
|
CACHE_TYPE_UNIFIED,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int cache_seq_show(struct seq_file *file, void *iter)
|
||
|
|
{
|
||
|
|
unsigned int cache_type = (unsigned int)file->private;
|
||
|
|
struct cache_info *cache;
|
||
|
|
unsigned int waysize, way;
|
||
|
|
unsigned long ccr;
|
||
|
|
unsigned long addrstart = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Go uncached immediately so we don't skew the results any
|
||
|
|
* more than we already are..
|
||
|
|
*/
|
||
|
|
jump_to_uncached();
|
||
|
|
|
||
|
|
ccr = __raw_readl(SH_CCR);
|
||
|
|
if ((ccr & CCR_CACHE_ENABLE) == 0) {
|
||
|
|
back_to_cached();
|
||
|
|
|
||
|
|
seq_printf(file, "disabled\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cache_type == CACHE_TYPE_DCACHE) {
|
||
|
|
addrstart = CACHE_OC_ADDRESS_ARRAY;
|
||
|
|
cache = ¤t_cpu_data.dcache;
|
||
|
|
} else {
|
||
|
|
addrstart = CACHE_IC_ADDRESS_ARRAY;
|
||
|
|
cache = ¤t_cpu_data.icache;
|
||
|
|
}
|
||
|
|
|
||
|
|
waysize = cache->sets;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the OC is already in RAM mode, we only have
|
||
|
|
* half of the entries to consider..
|
||
|
|
*/
|
||
|
|
if ((ccr & CCR_CACHE_ORA) && cache_type == CACHE_TYPE_DCACHE)
|
||
|
|
waysize >>= 1;
|
||
|
|
|
||
|
|
waysize <<= cache->entry_shift;
|
||
|
|
|
||
|
|
for (way = 0; way < cache->ways; way++) {
|
||
|
|
unsigned long addr;
|
||
|
|
unsigned int line;
|
||
|
|
|
||
|
|
seq_printf(file, "-----------------------------------------\n");
|
||
|
|
seq_printf(file, "Way %d\n", way);
|
||
|
|
seq_printf(file, "-----------------------------------------\n");
|
||
|
|
|
||
|
|
for (addr = addrstart, line = 0;
|
||
|
|
addr < addrstart + waysize;
|
||
|
|
addr += cache->linesz, line++) {
|
||
|
|
unsigned long data = __raw_readl(addr);
|
||
|
|
|
||
|
|
/* Check the V bit, ignore invalid cachelines */
|
||
|
|
if ((data & 1) == 0)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
/* U: Dirty, cache tag is 10 bits up */
|
||
|
|
seq_printf(file, "%3d: %c 0x%lx\n",
|
||
|
|
line, data & 2 ? 'U' : ' ',
|
||
|
|
data & 0x1ffffc00);
|
||
|
|
}
|
||
|
|
|
||
|
|
addrstart += cache->way_incr;
|
||
|
|
}
|
||
|
|
|
||
|
|
back_to_cached();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cache_debugfs_open(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
return single_open(file, cache_seq_show, inode->i_private);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations cache_debugfs_fops = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.open = cache_debugfs_open,
|
||
|
|
.read = seq_read,
|
||
|
|
.llseek = seq_lseek,
|
||
|
|
.release = single_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init cache_debugfs_init(void)
|
||
|
|
{
|
||
|
|
struct dentry *dcache_dentry, *icache_dentry;
|
||
|
|
|
||
|
|
dcache_dentry = debugfs_create_file("dcache", S_IRUSR, arch_debugfs_dir,
|
||
|
|
(unsigned int *)CACHE_TYPE_DCACHE,
|
||
|
|
&cache_debugfs_fops);
|
||
|
|
if (!dcache_dentry)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
icache_dentry = debugfs_create_file("icache", S_IRUSR, arch_debugfs_dir,
|
||
|
|
(unsigned int *)CACHE_TYPE_ICACHE,
|
||
|
|
&cache_debugfs_fops);
|
||
|
|
if (!icache_dentry) {
|
||
|
|
debugfs_remove(dcache_dentry);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
module_init(cache_debugfs_init);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL v2");
|