C++ (Cpp) kgsl_get_pte_from_vaddr примеры использования

Пример #1

Файл: kgsl.c Проект: DeeJay-NuKe/FreeXperia

static long kgsl_cache_range_op(unsigned long addr, int size,
					unsigned int flags)
{
#ifdef CONFIG_OUTER_CACHE
	unsigned long end;
#endif
	BUG_ON(addr & (KGSL_PAGESIZE - 1));
	BUG_ON(size & (KGSL_PAGESIZE - 1));

	if (flags & KGSL_CACHE_FLUSH)
		dmac_flush_range((const void *)addr,
				(const void *)(addr + size));
	else
		if (flags & KGSL_CACHE_CLEAN)
			dmac_clean_range((const void *)addr,
					(const void *)(addr + size));
		else
			dmac_inv_range((const void *)addr,
					(const void *)(addr + size));

#ifdef CONFIG_OUTER_CACHE
	for (end = addr; end < (addr + size); end += KGSL_PAGESIZE) {
		pte_t *pte_ptr, pte;
		unsigned long physaddr;
		if (flags & KGSL_CACHE_VMALLOC_ADDR)
			physaddr = vmalloc_to_pfn((void *)end);
		else
			if (flags & KGSL_CACHE_USER_ADDR) {
				pte_ptr = kgsl_get_pte_from_vaddr(end);
				if (!pte_ptr)
					return -EINVAL;
				pte = *pte_ptr;
				physaddr = pte_pfn(pte);
				pte_unmap(pte_ptr);
			} else
				return -EINVAL;

		physaddr <<= PAGE_SHIFT;
		if (flags & KGSL_CACHE_FLUSH)
			outer_flush_range(physaddr, physaddr + KGSL_PAGESIZE);
		else
			if (flags & KGSL_CACHE_CLEAN)
				outer_clean_range(physaddr,
					physaddr + KGSL_PAGESIZE);
			else
				outer_inv_range(physaddr,
					physaddr + KGSL_PAGESIZE);
	}
#endif
	return 0;
}

Пример #2

Файл: kgsl.c Проект: bigsley-sdg/linux_on_wince_htc

static long flush_l1_cache_range(unsigned long addr, int size)
{
	struct page *page;
	pte_t *pte_ptr;
	unsigned long end;

	for (end = addr; end < (addr + size); end += KGSL_PAGESIZE) {
		pte_ptr = kgsl_get_pte_from_vaddr(end);
		if (!pte_ptr)
			return -EINVAL;

		page = pte_page(pte_val(*pte_ptr));
		if (!page) {
			KGSL_DRV_ERR("could not find page for pte\n");
			pte_unmap(pte_ptr);
			return -EINVAL;
		}

		pte_unmap(pte_ptr);
		flush_dcache_page(page);
	}

	return 0;
}