/**
* mn10300_dcache_flush_range2 - Globally flush range of data cache
* @start: The start address of the region to be flushed.
* @size: The size of the region to be flushed.
*
* Flush a range of addresses in the data cache on all CPUs, between start and
* start+size-1 inclusive.
*/
void mn10300_dcache_flush_range2(unsigned long start, unsigned long size)
{
unsigned long flags;
flags = smp_lock_cache();
mn10300_local_dcache_flush_range2(start, size);
smp_cache_call(SMP_DCACHE_FLUSH_RANGE, start, start + size);
smp_unlock_cache(flags);
}
/**
* flush_icache_page_range - Flush dcache and invalidate icache for part of a
* single page
* @start: The starting virtual address of the page part.
* @end: The ending virtual address of the page part.
*
* Flush the dcache and invalidate the icache for part of a single page, as
* determined by the virtual addresses given. The page must be in the paged
* area.
*/
static void flush_icache_page_range(unsigned long start, unsigned long end)
{
unsigned long addr, size, off;
struct page *page;
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *ppte, pte;
/* work out how much of the page to flush */
off = start & ~PAGE_MASK;
size = end - start;
/* get the physical address the page is mapped to from the page
* tables */
pgd = pgd_offset(current->mm, start);
if (!pgd || !pgd_val(*pgd))
return;
pud = pud_offset(pgd, start);
if (!pud || !pud_val(*pud))
return;
pmd = pmd_offset(pud, start);
if (!pmd || !pmd_val(*pmd))
return;
ppte = pte_offset_map(pmd, start);
if (!ppte)
return;
pte = *ppte;
pte_unmap(ppte);
if (pte_none(pte))
return;
page = pte_page(pte);
if (!page)
return;
addr = page_to_phys(page);
/* flush the dcache and invalidate the icache coverage on that
* region */
mn10300_local_dcache_flush_range2(addr + off, size);
mn10300_local_icache_inv_range2(addr + off, size);
smp_cache_call(SMP_IDCACHE_INV_FLUSH_RANGE, start, end);
}
static void flush_icache_page_range(unsigned long start, unsigned long end)
{
unsigned long addr, size, off;
struct page *page;
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *ppte, pte;
/* */
off = start & ~PAGE_MASK;
size = end - start;
/*
*/
pgd = pgd_offset(current->mm, start);
if (!pgd || !pgd_val(*pgd))
return;
pud = pud_offset(pgd, start);
if (!pud || !pud_val(*pud))
return;
pmd = pmd_offset(pud, start);
if (!pmd || !pmd_val(*pmd))
return;
ppte = pte_offset_map(pmd, start);
if (!ppte)
return;
pte = *ppte;
pte_unmap(ppte);
if (pte_none(pte))
return;
page = pte_page(pte);
if (!page)
return;
addr = page_to_phys(page);
/*
*/
mn10300_local_dcache_flush_range2(addr + off, size);
mn10300_local_icache_inv_range2(addr + off, size);
smp_cache_call(SMP_IDCACHE_INV_FLUSH_RANGE, start, end);
}