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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/syscalls.h>
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#include <linux/spinlock.h>
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#include <asm/page.h>
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#include <asm/cache.h>
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#include <asm/cacheflush.h>
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#include <asm/cachectl.h>
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void flush_dcache_page(struct page *page)
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{
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struct address_space *mapping = page_mapping(page);
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unsigned long addr;
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if (mapping && !mapping_mapped(mapping)) {
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set_bit(PG_arch_1, &(page)->flags);
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return;
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}
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/*
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* We could delay the flush for the !page_mapping case too. But that
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* case is for exec env/arg pages and those are %99 certainly going to
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* get faulted into the tlb (and thus flushed) anyways.
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*/
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addr = (unsigned long) page_address(page);
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dcache_wb_range(addr, addr + PAGE_SIZE);
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}
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void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
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pte_t *pte)
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{
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unsigned long addr;
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struct page *page;
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unsigned long pfn;
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pfn = pte_pfn(*pte);
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if (unlikely(!pfn_valid(pfn)))
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return;
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page = pfn_to_page(pfn);
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addr = (unsigned long) page_address(page);
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if (vma->vm_flags & VM_EXEC ||
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pages_do_alias(addr, address & PAGE_MASK))
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cache_wbinv_all();
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clear_bit(PG_arch_1, &(page)->flags);
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}
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