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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/syscalls.h>
#include <linux/spinlock.h>
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/cacheflush.h>
#include <asm/cachectl.h>
#include <asm/tlbflush.h>
#define PG_dcache_clean PG_arch_1
void flush_dcache_folio(struct folio *folio)
{
struct address_space *mapping;
if (is_zero_pfn(folio_pfn(folio)))
return;
mapping = folio_flush_mapping(folio);
if (mapping && !folio_mapped(folio))
clear_bit(PG_dcache_clean, &folio->flags);
else {
dcache_wbinv_all();
if (mapping)
icache_inv_all();
set_bit(PG_dcache_clean, &folio->flags);
}
}
EXPORT_SYMBOL(flush_dcache_folio);
void flush_dcache_page(struct page *page)
{
flush_dcache_folio(page_folio(page));
}
EXPORT_SYMBOL(flush_dcache_page);
void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep, unsigned int nr)
{
unsigned long pfn = pte_pfn(*ptep);
struct folio *folio;
flush_tlb_page(vma, addr);
if (!pfn_valid(pfn))
return;
if (is_zero_pfn(pfn))
return;
folio = page_folio(pfn_to_page(pfn));
if (!test_and_set_bit(PG_dcache_clean, &folio->flags))
dcache_wbinv_all();
if (folio_flush_mapping(folio)) {
if (vma->vm_flags & VM_EXEC)
icache_inv_all();
}
}
void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
dcache_wbinv_all();
if (vma->vm_flags & VM_EXEC)
icache_inv_all();
}
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