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