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/*
* (C) Copyright 2015
* Kamil Lulko, <kamil.lulko@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/armv7m.h>
#include <asm/arch/stm32.h>
u32 get_cpu_rev(void)
{
return 0;
}
int arch_cpu_init(void)
{
/*
* Configure the memory protection unit (MPU)
* 0x00000000 - 0xffffffff: Strong-order, Shareable
* 0xC0000000 - 0xC0800000: Normal, Outer and inner Non-cacheable
*/
/* Disable MPU */
writel(0, &V7M_MPU->ctrl);
writel(
0x00000000 /* address */
| 1 << 4 /* VALID */
| 0 << 0 /* REGION */
, &V7M_MPU->rbar
);
/* Strong-order, Shareable */
/* TEX=000, S=1, C=0, B=0*/
writel(
(V7M_MPU_RASR_XN_ENABLE
| V7M_MPU_RASR_AP_RW_RW
| 0x01 << V7M_MPU_RASR_S_SHIFT
| 0x00 << V7M_MPU_RASR_TEX_SHIFT
| V7M_MPU_RASR_SIZE_4GB
| V7M_MPU_RASR_EN)
, &V7M_MPU->rasr
);
writel(
0xC0000000 /* address */
| 1 << 4 /* VALID */
| 1 << 0 /* REGION */
, &V7M_MPU->rbar
);
/* Normal, Outer and inner Non-cacheable */
/* TEX=001, S=0, C=0, B=0*/
writel(
(V7M_MPU_RASR_XN_ENABLE
| V7M_MPU_RASR_AP_RW_RW
| 0x01 << V7M_MPU_RASR_TEX_SHIFT
| 0x01 << V7M_MPU_RASR_B_SHIFT
| 0x01 << V7M_MPU_RASR_C_SHIFT
| V7M_MPU_RASR_SIZE_8MB
| V7M_MPU_RASR_EN)
, &V7M_MPU->rasr
);
/* Enable MPU */
writel(V7M_MPU_CTRL_ENABLE | V7M_MPU_CTRL_HFNMIENA, &V7M_MPU->ctrl);
return 0;
}
void s_init(void)
{
}
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