81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2017-11-14 Tanek porting from stm32f429-apollo
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <LPC54608.h>
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#define DEBUG
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#ifdef DEBUG
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#define MPU_PRINT(...) rt_kprintf(__VA_ARGS__)
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#else
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#define MPU_PRINT((...))
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#endif
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/* initialize for gui driver */
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int rt_hw_mpu_init(void)
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{
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uint32_t rbar;
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uint32_t rasr;
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MPU_PRINT("\nnumber of regions: %d\n", (MPU->TYPE & MPU_TYPE_DREGION_Msk) >> MPU_TYPE_DREGION_Pos);
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/* Disable MPU */
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ARM_MPU_Disable();
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/* - Region 0: 0x00000000 - 0x0007FFFF --- on-chip non-volatile memory
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* + Size: 512kB
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* + Acess permission: full access
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*/
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rbar = ARM_MPU_RBAR(0, 0x00000000);
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rasr = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_512KB);
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ARM_MPU_SetRegion(rbar, rasr);
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/* - Region 1:0x20000000 - 0x20027FFF --- on chip SRAM
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* + Size: 160kB
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* + Access permission: full access
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*/
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rbar = ARM_MPU_RBAR(1, 0x20000000);
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rasr = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_256KB);
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ARM_MPU_SetRegion(rbar, rasr);
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/* - Region 2: 0x40000000 - 0x43FFFFFF --- APB peripheral
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* + Size: 64MB
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* + Access permission: full access
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*/
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rbar = ARM_MPU_RBAR(2, 0x40000000);
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rasr = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_64MB);
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ARM_MPU_SetRegion(rbar, rasr);
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/* - Region 3: 0xA0000000 - 0xA0800000 --- External SDRAM
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* + Size: 8MB
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* + AP=b011: full access
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*/
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rbar = ARM_MPU_RBAR(3, 0xA0000000);
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rasr = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_8MB);
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ARM_MPU_SetRegion(rbar, rasr);
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/* - Region 4: 0xE0000000 - 0xE00FFFFF --- System control
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* + Size: 1MB
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* + Access permission: full access
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*/
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rbar = ARM_MPU_RBAR(4, 0xE0000000);
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rasr = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, 0, 0, 0, 0, 0, ARM_MPU_REGION_SIZE_1MB);
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ARM_MPU_SetRegion(rbar, rasr);
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ARM_MPU_Enable(MPU_CTRL_PRIVDEFENA_Msk);
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return 0;
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}
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INIT_BOARD_EXPORT(rt_hw_mpu_init);
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