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score: add flush_dcahce_page and PG_dcache_dirty define 

Signed-off-by: Cui Bixiong <bixiong@sunnorth.com.cn>
Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com>

	modified:   arch/score/include/asm/cacheflush.h
	modified:   arch/score/mm/cache.c
hifive-unleashed-5.1
Chen Liqin 2009-11-18 13:22:33 +08:00
parent 718deb6b61
commit 11ab3f3d3c
2 changed files with 27 additions and 3 deletions
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4
arch/score/include/asm/cacheflush.h
View File

@ -14,10 +14,12 @@ extern void flush_cache_sigtramp(unsigned long addr);
extern void flush_icache_all(void);
extern void flush_icache_range(unsigned long start, unsigned long end);
extern void flush_dcache_range(unsigned long start, unsigned long end);
extern void flush_dcache_page(struct page *page);
#define PG_dcache_dirty PG_arch_1
#define flush_cache_dup_mm(mm) do {} while (0)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#define flush_dcache_page(page) do {} while (0)
#define flush_dcache_mmap_lock(mapping) do {} while (0)
#define flush_dcache_mmap_unlock(mapping) do {} while (0)
#define flush_cache_vmap(start, end) do {} while (0)

26
arch/score/mm/cache.c
View File

@ -29,6 +29,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <asm/mmu_context.h>
@ -51,6 +52,27 @@ static void flush_data_cache_page(unsigned long addr)
}
}
void flush_dcache_page(struct page *page)
{
struct address_space *mapping = page_mapping(page);
unsigned long addr;
if (PageHighMem(page))
return;
if (mapping && !mapping_mapped(mapping)) {
set_bit(PG_dcache_dirty, &(page)->flags);
return;
}
/*
* We could delay the flush for the !page_mapping case too. But that
* case is for exec env/arg pages and those are %99 certainly going to
* get faulted into the tlb (and thus flushed) anyways.
*/
addr = (unsigned long) page_address(page);
flush_data_cache_page(addr);
}
/* called by update_mmu_cache. */
void __update_cache(struct vm_area_struct *vma, unsigned long address,
pte_t pte)
@ -63,11 +85,11 @@ void __update_cache(struct vm_area_struct *vma, unsigned long address,
if (unlikely(!pfn_valid(pfn)))
return;
page = pfn_to_page(pfn);
if (page_mapping(page) && test_bit(PG_arch_1, &page->flags)) {
if (page_mapping(page) && test_bit(PG_dcache_dirty, &(page)->flags)) {
addr = (unsigned long) page_address(page);
if (exec)
flush_data_cache_page(addr);
clear_bit(PG_arch_1, &page->flags);
clear_bit(PG_dcache_dirty, &(page)->flags);
}
}