// 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/syscalls.h>
|
#include <linux/spinlock.h>
|
#include <asm/page.h>
|
#include <asm/cache.h>
|
#include <asm/cacheflush.h>
|
#include <asm/cachectl.h>
|
|
#define PG_dcache_clean PG_arch_1
|
|
void flush_dcache_page(struct page *page)
|
{
|
struct address_space *mapping;
|
|
if (page == ZERO_PAGE(0))
|
return;
|
|
mapping = page_mapping_file(page);
|
|
if (mapping && !page_mapcount(page))
|
clear_bit(PG_dcache_clean, &page->flags);
|
else {
|
dcache_wbinv_all();
|
if (mapping)
|
icache_inv_all();
|
set_bit(PG_dcache_clean, &page->flags);
|
}
|
}
|
EXPORT_SYMBOL(flush_dcache_page);
|
|
void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
|
pte_t *ptep)
|
{
|
unsigned long pfn = pte_pfn(*ptep);
|
struct page *page;
|
|
if (!pfn_valid(pfn))
|
return;
|
|
page = pfn_to_page(pfn);
|
if (page == ZERO_PAGE(0))
|
return;
|
|
if (!test_and_set_bit(PG_dcache_clean, &page->flags))
|
dcache_wbinv_all();
|
|
if (page_mapping_file(page)) {
|
if (vma->vm_flags & VM_EXEC)
|
icache_inv_all();
|
}
|
}
|
|
void flush_kernel_dcache_page(struct page *page)
|
{
|
struct address_space *mapping;
|
|
mapping = page_mapping_file(page);
|
|
if (!mapping || mapping_mapped(mapping))
|
dcache_wbinv_all();
|
}
|
EXPORT_SYMBOL(flush_kernel_dcache_page);
|
|
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();
|
}
|
