From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/sh/mm/cache-debugfs.c | 109 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 arch/sh/mm/cache-debugfs.c (limited to 'arch/sh/mm/cache-debugfs.c') diff --git a/arch/sh/mm/cache-debugfs.c b/arch/sh/mm/cache-debugfs.c new file mode 100644 index 0000000000..b0f185169d --- /dev/null +++ b/arch/sh/mm/cache-debugfs.c @@ -0,0 +1,109 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include + +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 = ¤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; +} + +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"); -- cgit v1.2.3