1/* 2 * Copyright 2017, Data61 3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO) 4 * ABN 41 687 119 230. 5 * 6 * This software may be distributed and modified according to the terms of 7 * the BSD 2-Clause license. Note that NO WARRANTY is provided. 8 * See "LICENSE_BSD2.txt" for details. 9 * 10 * @TAG(DATA61_BSD) 11 */ 12 13#pragma once 14 15#include <stdbool.h> 16#include <stdint.h> 17#include <utils/arith.h> 18 19#include <vspace/arch/page.h> 20 21#define SEL4_NUM_PAGE_SIZES ((int) ARRAY_SIZE(sel4_page_sizes)) 22 23static inline bool 24sel4_valid_size_bits(size_t size_bits) 25{ 26 for (int i = 0; i < SEL4_NUM_PAGE_SIZES && size_bits >= sel4_page_sizes[i]; i++) { 27 /* sanity check, sel4_page_sizes should be ordered */ 28 if (i > 0) { 29 assert(sel4_page_sizes[i - 1] < sel4_page_sizes[i]); 30 } 31 if (size_bits == sel4_page_sizes[i]) { 32 return true; 33 } 34 } 35 36 return false; 37} 38 39static inline int 40sel4_page_size_bits_for_memory_region(size_t size_bytes) { 41 int frame_size_index = 0; 42 /* find the largest reasonable frame size */ 43 while (frame_size_index + 1 < SEL4_NUM_PAGE_SIZES) { 44 if (size_bytes >> sel4_page_sizes[frame_size_index + 1] == 0) { 45 break; 46 } 47 frame_size_index++; 48 } 49 return sel4_page_sizes[frame_size_index]; 50} 51 52