1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * arch/sh/mm/cache-j2.c 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2015-2016 Smart Energy Instruments, Inc. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #include <linux/init.h> 9*4882a593Smuzhiyun #include <linux/mm.h> 10*4882a593Smuzhiyun #include <linux/cpumask.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <asm/cache.h> 13*4882a593Smuzhiyun #include <asm/addrspace.h> 14*4882a593Smuzhiyun #include <asm/processor.h> 15*4882a593Smuzhiyun #include <asm/cacheflush.h> 16*4882a593Smuzhiyun #include <asm/io.h> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define ICACHE_ENABLE 0x1 19*4882a593Smuzhiyun #define DCACHE_ENABLE 0x2 20*4882a593Smuzhiyun #define CACHE_ENABLE (ICACHE_ENABLE | DCACHE_ENABLE) 21*4882a593Smuzhiyun #define ICACHE_FLUSH 0x100 22*4882a593Smuzhiyun #define DCACHE_FLUSH 0x200 23*4882a593Smuzhiyun #define CACHE_FLUSH (ICACHE_FLUSH | DCACHE_FLUSH) 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun u32 __iomem *j2_ccr_base; 26*4882a593Smuzhiyun j2_flush_icache(void * args)27*4882a593Smuzhiyunstatic void j2_flush_icache(void *args) 28*4882a593Smuzhiyun { 29*4882a593Smuzhiyun unsigned cpu; 30*4882a593Smuzhiyun for_each_possible_cpu(cpu) 31*4882a593Smuzhiyun __raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu); 32*4882a593Smuzhiyun } 33*4882a593Smuzhiyun j2_flush_dcache(void * args)34*4882a593Smuzhiyunstatic void j2_flush_dcache(void *args) 35*4882a593Smuzhiyun { 36*4882a593Smuzhiyun unsigned cpu; 37*4882a593Smuzhiyun for_each_possible_cpu(cpu) 38*4882a593Smuzhiyun __raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu); 39*4882a593Smuzhiyun } 40*4882a593Smuzhiyun j2_flush_both(void * args)41*4882a593Smuzhiyunstatic void j2_flush_both(void *args) 42*4882a593Smuzhiyun { 43*4882a593Smuzhiyun unsigned cpu; 44*4882a593Smuzhiyun for_each_possible_cpu(cpu) 45*4882a593Smuzhiyun __raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu); 46*4882a593Smuzhiyun } 47*4882a593Smuzhiyun j2_cache_init(void)48*4882a593Smuzhiyunvoid __init j2_cache_init(void) 49*4882a593Smuzhiyun { 50*4882a593Smuzhiyun if (!j2_ccr_base) 51*4882a593Smuzhiyun return; 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun local_flush_cache_all = j2_flush_both; 54*4882a593Smuzhiyun local_flush_cache_mm = j2_flush_both; 55*4882a593Smuzhiyun local_flush_cache_dup_mm = j2_flush_both; 56*4882a593Smuzhiyun local_flush_cache_page = j2_flush_both; 57*4882a593Smuzhiyun local_flush_cache_range = j2_flush_both; 58*4882a593Smuzhiyun local_flush_dcache_page = j2_flush_dcache; 59*4882a593Smuzhiyun local_flush_icache_range = j2_flush_icache; 60*4882a593Smuzhiyun local_flush_icache_page = j2_flush_icache; 61*4882a593Smuzhiyun local_flush_cache_sigtramp = j2_flush_icache; 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base)); 64*4882a593Smuzhiyun } 65