From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lpdvsmtp01.broadcom.com ([192.19.211.62]:41172 "EHLO relay.smtp.broadcom.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23993908AbdAKToxPNcNY (ORCPT ); Wed, 11 Jan 2017 20:44:53 +0100 From: justinpopo6@gmail.com Subject: [PATCH] MIPS: Add cacheinfo support Date: Wed, 11 Jan 2017 11:44:32 -0800 Message-Id: <20170111194432.24283-1-justinpopo6@gmail.com> Return-Path: Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-subscribe: List-owner: List-post: List-archive: To: linux-mips@linux-mips.org Cc: bcm-kernel-feedback-list@broadcom.com, leonid.yegoshin@imgtec.com, f.fainelli@gmail.com, Justin Chen From: Justin Chen Add cacheinfo support for MIPS architectures. Use information from the cpuinfo_mips struct to populate the cacheinfo struct. This allows an architecture agnostic approach, however this also means if cache information is not properly populated within the cpuinfo_mips struct, there is nothing we can do. (I.E. c-r3k.c) Signed-off-by: Justin Chen --- arch/mips/kernel/Makefile | 2 +- arch/mips/kernel/cacheinfo.c | 85 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 86 insertions(+), 1 deletion(-) create mode 100644 arch/mips/kernel/cacheinfo.c diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 4a603a3..904a9c4 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -7,7 +7,7 @@ extra-y := head.o vmlinux.lds obj-y += cpu-probe.o branch.o elf.o entry.o genex.o idle.o irq.o \ process.o prom.o ptrace.o reset.o setup.o signal.o \ syscall.o time.o topology.o traps.o unaligned.o watch.o \ - vdso.o + vdso.o cacheinfo.o ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_ftrace.o = -pg diff --git a/arch/mips/kernel/cacheinfo.c b/arch/mips/kernel/cacheinfo.c new file mode 100644 index 0000000..a92bbba --- /dev/null +++ b/arch/mips/kernel/cacheinfo.c @@ -0,0 +1,85 @@ +/* + * MIPS cacheinfo support + * + * 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. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include + +/* Populates leaf and increments to next leaf */ +#define populate_cache(cache, leaf, c_level, c_type) \ + leaf->type = c_type; \ + leaf->level = c_level; \ + leaf->coherency_line_size = c->cache.linesz; \ + leaf->number_of_sets = c->cache.sets; \ + leaf->ways_of_associativity = c->cache.ways; \ + leaf->size = c->cache.linesz * c->cache.sets * \ + c->cache.ways; \ + leaf++; + +static int __init_cache_level(unsigned int cpu) +{ + struct cpuinfo_mips *c = ¤t_cpu_data; + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + int levels = 0, leaves = 0; + + /* + * If Dcache is not set, we assume the cache structures + * are not properly initialized. + */ + if (c->dcache.waysize) + levels += 1; + else + return -ENOENT; + + + leaves += (c->icache.waysize) ? 2 : 1; + + if (c->scache.waysize) { + levels++; + leaves++; + } + + if (c->tcache.waysize) { + levels++; + leaves++; + } + + this_cpu_ci->num_levels = levels; + this_cpu_ci->num_leaves = leaves; + return 0; +} + +static int __populate_cache_leaves(unsigned int cpu) +{ + struct cpuinfo_mips *c = ¤t_cpu_data; + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + struct cacheinfo *this_leaf = this_cpu_ci->info_list; + + if (c->icache.waysize) { + populate_cache(dcache, this_leaf, 1, CACHE_TYPE_DATA); + populate_cache(icache, this_leaf, 1, CACHE_TYPE_INST); + } else { + populate_cache(dcache, this_leaf, 1, CACHE_TYPE_UNIFIED); + } + + if (c->scache.waysize) + populate_cache(scache, this_leaf, 2, CACHE_TYPE_UNIFIED); + + if (c->tcache.waysize) + populate_cache(tcache, this_leaf, 3, CACHE_TYPE_UNIFIED); + + return 0; +} + +DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level) +DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves) -- 2.10.2