79 int page_is_ram(unsigned long pfn)  in page_is_ram()  argument
82 	return pfn < max_pfn;  in page_is_ram()
84 	unsigned long paddr = (pfn << PAGE_SHIFT);  in page_is_ram()
94 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,  in phys_mem_access_prot()  argument
98 		return ppc_md.phys_mem_access_prot(file, pfn, size, vma_prot);  in phys_mem_access_prot()
100 	if (!page_is_ram(pfn))  in phys_mem_access_prot()
341 		unsigned long pfn, highmem_mapnr;  in mem_init()  local
344 		for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) {  in mem_init()
345 			phys_addr_t paddr = (phys_addr_t)pfn << PAGE_SHIFT;  in mem_init()
346 			struct page *page = pfn_to_page(pfn);  in mem_init()
561 int devmem_is_allowed(unsigned long pfn)  in devmem_is_allowed()  argument
563 	if (iomem_is_exclusive(pfn << PAGE_SHIFT))  in devmem_is_allowed()
565 	if (!page_is_ram(pfn))  in devmem_is_allowed()
567 	if (page_is_rtas_user_buf(pfn))  in devmem_is_allowed()