kopia lustrzana https://github.com/espressif/esp-idf
49 wiersze
1.6 KiB
C
49 wiersze
1.6 KiB
C
// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
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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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#include <stdbool.h>
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#include "xtensa/config/core.h"
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#include "hal/cpu_hal.h"
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#include "hal/mpu_hal.h"
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#include "hal/mpu_types.h"
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#include "soc/soc_caps.h"
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#include "bootloader_mem.h"
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#include "xt_instr_macros.h"
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#include "xtensa/config/specreg.h"
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static inline void cpu_configure_region_protection(void)
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{
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/* Currently, the only supported chips esp32 and esp32s2
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* have the same configuration. Move this to the port layer once
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* more chips with different configurations are supported.
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*
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* Both chips have the address space divided into 8 regions, 512MB each.
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*/
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const int illegal_regions[] = {0, 4, 5, 6, 7}; // 0x00000000, 0x80000000, 0xa0000000, 0xc0000000, 0xe0000000
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for (int i = 0; i < sizeof(illegal_regions) / sizeof(illegal_regions[0]); ++i) {
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mpu_hal_set_region_access(illegal_regions[i], MPU_REGION_ILLEGAL);
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}
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mpu_hal_set_region_access(1, MPU_REGION_RW); // 0x20000000
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}
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void bootloader_init_mem(void)
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{
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cpu_hal_init_hwloop();
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// protect memory region
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cpu_configure_region_protection();
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}
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