1 /* 2 * arch/sh/mm/cache-j2.c 3 * 4 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc. 5 * 6 * Released under the terms of the GNU GPL v2.0. 7 */ 8 9 #include <linux/init.h> 10 #include <linux/mm.h> 11 #include <linux/cpumask.h> 12 13 #include <asm/cache.h> 14 #include <asm/addrspace.h> 15 #include <asm/processor.h> 16 #include <asm/cacheflush.h> 17 #include <asm/io.h> 18 19 #define ICACHE_ENABLE 0x1 20 #define DCACHE_ENABLE 0x2 21 #define CACHE_ENABLE (ICACHE_ENABLE | DCACHE_ENABLE) 22 #define ICACHE_FLUSH 0x100 23 #define DCACHE_FLUSH 0x200 24 #define CACHE_FLUSH (ICACHE_FLUSH | DCACHE_FLUSH) 25 26 u32 __iomem *j2_ccr_base; 27 28 static void j2_flush_icache(void *args) 29 { 30 unsigned cpu; 31 for_each_possible_cpu(cpu) 32 __raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu); 33 } 34 35 static void j2_flush_dcache(void *args) 36 { 37 unsigned cpu; 38 for_each_possible_cpu(cpu) 39 __raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu); 40 } 41 42 static void j2_flush_both(void *args) 43 { 44 unsigned cpu; 45 for_each_possible_cpu(cpu) 46 __raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu); 47 } 48 49 void __init j2_cache_init(void) 50 { 51 if (!j2_ccr_base) 52 return; 53 54 local_flush_cache_all = j2_flush_both; 55 local_flush_cache_mm = j2_flush_both; 56 local_flush_cache_dup_mm = j2_flush_both; 57 local_flush_cache_page = j2_flush_both; 58 local_flush_cache_range = j2_flush_both; 59 local_flush_dcache_page = j2_flush_dcache; 60 local_flush_icache_range = j2_flush_icache; 61 local_flush_icache_page = j2_flush_icache; 62 local_flush_cache_sigtramp = j2_flush_icache; 63 64 pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base)); 65 } 66