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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019
* Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
*/
#include <common.h>
#include <init.h>
#include <asm/io.h>
#include <asm/armv7_mpu.h>
#include <linux/bitops.h>
int arch_cpu_init(void)
{
int i;
struct mpu_region_config imxrt1050_region_config[] = {
{ 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
STRONG_ORDER, REGION_4GB },
{ PHYS_SDRAM, REGION_1, XN_DIS, PRIV_RW_USR_RW,
O_I_WB_RD_WR_ALLOC, (ffs(PHYS_SDRAM_SIZE) - 2) },
{ DMAMEM_BASE,
REGION_2, XN_DIS, PRIV_RW_USR_RW,
STRONG_ORDER, (ffs(DMAMEM_SZ_ALL) - 2) },
};
/*
* Configure the memory protection unit (MPU) to allow full access to
* the whole 4GB address space.
*/
disable_mpu();
for (i = 0; i < ARRAY_SIZE(imxrt1050_region_config); i++)
mpu_config(&imxrt1050_region_config[i]);
enable_mpu();
return 0;
}
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