cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cache-j2.c (1541B)


      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * arch/sh/mm/cache-j2.c
      4 *
      5 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
      6 */
      7
      8#include <linux/init.h>
      9#include <linux/mm.h>
     10#include <linux/cpumask.h>
     11
     12#include <asm/cache.h>
     13#include <asm/addrspace.h>
     14#include <asm/processor.h>
     15#include <asm/cacheflush.h>
     16#include <asm/io.h>
     17
     18#define ICACHE_ENABLE	0x1
     19#define DCACHE_ENABLE	0x2
     20#define CACHE_ENABLE	(ICACHE_ENABLE | DCACHE_ENABLE)
     21#define ICACHE_FLUSH	0x100
     22#define DCACHE_FLUSH	0x200
     23#define CACHE_FLUSH	(ICACHE_FLUSH | DCACHE_FLUSH)
     24
     25u32 __iomem *j2_ccr_base;
     26
     27static void j2_flush_icache(void *args)
     28{
     29	unsigned cpu;
     30	for_each_possible_cpu(cpu)
     31		__raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu);
     32}
     33
     34static void j2_flush_dcache(void *args)
     35{
     36	unsigned cpu;
     37	for_each_possible_cpu(cpu)
     38		__raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu);
     39}
     40
     41static void j2_flush_both(void *args)
     42{
     43	unsigned cpu;
     44	for_each_possible_cpu(cpu)
     45		__raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu);
     46}
     47
     48void __init j2_cache_init(void)
     49{
     50	if (!j2_ccr_base)
     51		return;
     52
     53	local_flush_cache_all = j2_flush_both;
     54	local_flush_cache_mm = j2_flush_both;
     55	local_flush_cache_dup_mm = j2_flush_both;
     56	local_flush_cache_page = j2_flush_both;
     57	local_flush_cache_range = j2_flush_both;
     58	local_flush_dcache_page = j2_flush_dcache;
     59	local_flush_icache_range = j2_flush_icache;
     60	local_flush_icache_page = j2_flush_icache;
     61	local_flush_cache_sigtramp = j2_flush_icache;
     62
     63	pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base));
     64}