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 25 u32 __iomem *j2_ccr_base; 26 27 static 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 34 static 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 41 static 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 48 void __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_folio = j2_flush_dcache; 59 local_flush_icache_range = j2_flush_icache; 60 local_flush_icache_folio = 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 } 65