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nios2: fix cache coherency 

There is intermittent cache coherency issue caught in toolchian tests.
Revert to use flushd.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
This commit is contained in:
Ley Foon Tan 2015-11-26 22:25:58 +08:00
parent 1ec218373b
commit 8e3d7c834b
1 changed files with 4 additions and 20 deletions
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24
arch/nios2/mm/cacheflush.c
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@ -23,22 +23,6 @@ static void __flush_dcache(unsigned long start, unsigned long end)
end += (cpuinfo.dcache_line_size - 1);
end &= ~(cpuinfo.dcache_line_size - 1);
for (addr = start; addr < end; addr += cpuinfo.dcache_line_size) {
__asm__ __volatile__ (" flushda 0(%0)\n"
: /* Outputs */
: /* Inputs */ "r"(addr)
/* : No clobber */);
}
}
static void __flush_dcache_all(unsigned long start, unsigned long end)
{
unsigned long addr;
start &= ~(cpuinfo.dcache_line_size - 1);
end += (cpuinfo.dcache_line_size - 1);
end &= ~(cpuinfo.dcache_line_size - 1);
if (end > start + cpuinfo.dcache_size)
end = start + cpuinfo.dcache_size;
@ -112,7 +96,7 @@ static void flush_aliases(struct address_space *mapping, struct page *page)
void flush_cache_all(void)
{
__flush_dcache_all(0, cpuinfo.dcache_size);
__flush_dcache(0, cpuinfo.dcache_size);
__flush_icache(0, cpuinfo.icache_size);
}
@ -182,7 +166,7 @@ void __flush_dcache_page(struct address_space *mapping, struct page *page)
*/
unsigned long start = (unsigned long)page_address(page);
__flush_dcache_all(start, start + PAGE_SIZE);
__flush_dcache(start, start + PAGE_SIZE);
}
void flush_dcache_page(struct page *page)
@ -268,7 +252,7 @@ void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
{
flush_cache_page(vma, user_vaddr, page_to_pfn(page));
memcpy(dst, src, len);
__flush_dcache_all((unsigned long)src, (unsigned long)src + len);
__flush_dcache((unsigned long)src, (unsigned long)src + len);
if (vma->vm_flags & VM_EXEC)
__flush_icache((unsigned long)src, (unsigned long)src + len);
}
@ -279,7 +263,7 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
{
flush_cache_page(vma, user_vaddr, page_to_pfn(page));
memcpy(dst, src, len);
__flush_dcache_all((unsigned long)dst, (unsigned long)dst + len);
__flush_dcache((unsigned long)dst, (unsigned long)dst + len);
if (vma->vm_flags & VM_EXEC)
__flush_icache((unsigned long)dst, (unsigned long)dst + len);
}