/* * Copyright 2024 Google LLC * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "drivers/mpu.h" // Everything but NULL + 256 const MpuRegion s_fake_app_region = { .region_num = 9, .enabled = true, .base_address = 256, .size = 0xFFFFFFFF - (1 << 8), .priv_read = true, .priv_write = true, .user_read = true, .user_write = true }; const MpuRegion* memory_layout_get_app_region(void) { return &s_fake_app_region; } bool memory_layout_is_pointer_in_region(const MpuRegion *region, const void *ptr) { uintptr_t p = (uintptr_t) ptr; return (p >= region->base_address && p < (region->base_address + region->size)); } bool memory_layout_is_buffer_in_region(const MpuRegion *region, const void *buf, size_t length) { return memory_layout_is_pointer_in_region(region, buf) && memory_layout_is_pointer_in_region(region, buf + length); }