66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
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/*
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* arch/sh/mm/cache-j2.c
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*
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* Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
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*
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* Released under the terms of the GNU GPL v2.0.
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*/
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/cpumask.h>
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#include <asm/cache.h>
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#include <asm/addrspace.h>
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#include <asm/processor.h>
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#include <asm/cacheflush.h>
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#include <asm/io.h>
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#define ICACHE_ENABLE 0x1
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#define DCACHE_ENABLE 0x2
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#define CACHE_ENABLE (ICACHE_ENABLE | DCACHE_ENABLE)
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#define ICACHE_FLUSH 0x100
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#define DCACHE_FLUSH 0x200
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#define CACHE_FLUSH (ICACHE_FLUSH | DCACHE_FLUSH)
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u32 __iomem *j2_ccr_base;
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static void j2_flush_icache(void *args)
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{
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unsigned cpu;
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for_each_possible_cpu(cpu)
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__raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu);
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}
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static void j2_flush_dcache(void *args)
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{
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unsigned cpu;
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for_each_possible_cpu(cpu)
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__raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu);
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}
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static void j2_flush_both(void *args)
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{
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unsigned cpu;
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for_each_possible_cpu(cpu)
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__raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu);
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}
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void __init j2_cache_init(void)
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{
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if (!j2_ccr_base)
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return;
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local_flush_cache_all = j2_flush_both;
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local_flush_cache_mm = j2_flush_both;
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local_flush_cache_dup_mm = j2_flush_both;
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local_flush_cache_page = j2_flush_both;
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local_flush_cache_range = j2_flush_both;
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local_flush_dcache_page = j2_flush_dcache;
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local_flush_icache_range = j2_flush_icache;
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local_flush_icache_page = j2_flush_icache;
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local_flush_cache_sigtramp = j2_flush_icache;
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pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base));
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}
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