/* * 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 <linux/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_debugfs_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 = &current_cpu_data.dcache;	} else {		addrstart = CACHE_IC_ADDRESS_ARRAY;		cache = &current_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;} DEFINE_SHOW_ATTRIBUTE(cache_debugfs); static int __init cache_debugfs_init(void){	debugfs_create_file("dcache", S_IRUSR, arch_debugfs_dir,			    (void *)CACHE_TYPE_DCACHE, &cache_debugfs_fops);	debugfs_create_file("icache", S_IRUSR, arch_debugfs_dir,			    (void *)CACHE_TYPE_ICACHE, &cache_debugfs_fops);	return 0;}module_init(cache_debugfs_init); MODULE_LICENSE("GPL v2");