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