157efa2904
Add PFN_PTE_SHIFT, update_mmu_cache_range(), flush_dcache_folio() and flush_icache_pages(). Change the PG_dcache_clean flag from being per-page to per-folio. Flush the entire folio containing the pages in flush_icache_pages() for ease of implementation. Link: https://lkml.kernel.org/r/20230802151406.3735276-25-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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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#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_folio = j2_flush_dcache;
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local_flush_icache_range = j2_flush_icache;
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local_flush_icache_folio = 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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