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rt-thread/libcpu/arm/zynqmp-r5/mpu.c

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/******************************************************************************
* Copyright (c) 2014 - 2020 Xilinx, Inc. All rights reserved.
* SPDX-License-Identifier: MIT
******************************************************************************/
/*****************************************************************************/
/**
* @file mpu.c
*
* This file contains initial configuration of the MPU.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- ---------------------------------------------------
* 5.00 pkp 02/20/14 First release
* 5.04 pkp 12/18/15 Updated MPU initialization as per the proper address map
* 6.00 pkp 06/27/16 moving the Init_MPU code to .boot section since it is a
* part of processor boot process
* 6.2 mus 01/27/17 Updated to support IAR compiler
* 7.1 mus 09/11/19 Added warning message if DDR size is not in power of 2.
* Fix for CR#1038577.
* 7.2 asa 04/08/20 Fix warning in the function Init_MPU.
* </pre>
*
* @note
*
* None.
*
******************************************************************************/
/***************************** Include Files *********************************/
#include <rtthread.h>
#include "zynqmp-r5.h"
#include "xreg_cortexr5.h"
#include "xpseudo_asm_gcc.h"
/***************** Macros (Inline Functions) Definitions *********************/
/**************************** Type Definitions *******************************/
typedef rt_int32_t s32;
typedef rt_uint64_t u64;
typedef rt_uint32_t u32;
/************************** Constant Definitions *****************************/
/************************** Variable Definitions *****************************/
static const struct {
u64 size;
unsigned int encoding;
}region_size[] = {
{ 0x20, REGION_32B },
{ 0x40, REGION_64B },
{ 0x80, REGION_128B },
{ 0x100, REGION_256B },
{ 0x200, REGION_512B },
{ 0x400, REGION_1K },
{ 0x800, REGION_2K },
{ 0x1000, REGION_4K },
{ 0x2000, REGION_8K },
{ 0x4000, REGION_16K },
{ 0x8000, REGION_32K },
{ 0x10000, REGION_64K },
{ 0x20000, REGION_128K },
{ 0x40000, REGION_256K },
{ 0x80000, REGION_512K },
{ 0x100000, REGION_1M },
{ 0x200000, REGION_2M },
{ 0x400000, REGION_4M },
{ 0x800000, REGION_8M },
{ 0x1000000, REGION_16M },
{ 0x2000000, REGION_32M },
{ 0x4000000, REGION_64M },
{ 0x8000000, REGION_128M },
{ 0x10000000, REGION_256M },
{ 0x20000000, REGION_512M },
{ 0x40000000, REGION_1G },
{ 0x80000000, REGION_2G },
{ 0x100000000, REGION_4G },
};
/************************** Function Prototypes ******************************/
#if defined (__GNUC__)
void Init_MPU(void) __attribute__((__section__(".boot")));
static void Xil_SetAttribute(u32 addr, u32 reg_size,s32 reg_num, u32 attrib) __attribute__((__section__(".boot")));
static void Xil_DisableMPURegions(void) __attribute__((__section__(".boot")));
#elif defined (__ICCARM__)
#pragma default_function_attributes = @ ".boot"
void Init_MPU(void);
static void Xil_SetAttribute(u32 addr, u32 reg_size,s32 reg_num, u32 attrib);
static void Xil_DisableMPURegions(void);
#endif
/*****************************************************************************
*
* Initialize MPU for a given address map and Enabled the background Region in
* MPU with default memory attributes for rest of address range for Cortex R5
* processor.
*
* @param None.
*
* @return None.
*
*
******************************************************************************/
void Init_MPU(void)
{
u32 Addr;
u32 RegSize = 0U;
u32 Attrib;
u32 RegNum = 0, i, Offset = 0;
u64 size;
Xil_DisableMPURegions();
Addr = 0x00000000U;
#ifdef XPAR_PSU_R5_DDR_0_S_AXI_BASEADDR
/* If the DDR is present, configure region as per DDR size */
size = (XPAR_PSU_R5_DDR_0_S_AXI_HIGHADDR - XPAR_PSU_R5_DDR_0_S_AXI_BASEADDR) + 1;
if (size < 0x80000000) {
/* Lookup the size. */
for (i = 0; i < sizeof region_size / sizeof region_size[0]; i++) {
if (size <= region_size[i].size) {
RegSize = region_size[i].encoding;
/* Check if DDR size is in power of 2*/
if ( XPAR_PSU_R5_DDR_0_S_AXI_BASEADDR == 0x100000)
Offset = XPAR_PSU_R5_DDR_0_S_AXI_BASEADDR;
if (region_size[i].size > (size + Offset + 1)) {
rt_kprintf ("WARNING: DDR size mapped to Cortexr5 processor is not \
in power of 2. As processor allocates MPU regions size \
in power of 2, address range %llx to %x has been \
incorrectly mapped as normal memory \n", \
region_size[i].size - 1, ((u32)XPAR_PSU_R5_DDR_0_S_AXI_HIGHADDR + 1));
}
break;
}
}
} else {
/* if the DDR size is > 2GB, truncate it to 2GB */
RegSize = REGION_2G;
}
#else
/* For DDRless system, configure region for TCM */
RegSize = REGION_256K;
#endif
Attrib = NORM_NSHARED_WB_WA | PRIV_RW_USER_RW;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/*
* 1G of strongly ordered memory from 0x80000000 to 0xBFFFFFFF for PL.
* 512 MB - LPD-PL interface
* 256 MB - FPD-PL (HPM0) interface
* 256 MB - FPD-PL (HPM1) interface
*/
Addr = 0x80000000;
RegSize = REGION_1G;
Attrib = STRONG_ORDERD_SHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/* 512M of device memory from 0xC0000000 to 0xDFFFFFFF for QSPI */
Addr = 0xC0000000U;
RegSize = REGION_512M;
Attrib = DEVICE_NONSHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/* 256M of device memory from 0xE0000000 to 0xEFFFFFFF for PCIe Low */
Addr = 0xE0000000U;
RegSize = REGION_256M;
Attrib = DEVICE_NONSHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/* 16M of device memory from 0xF8000000 to 0xF8FFFFFF for STM_CORESIGHT */
Addr = 0xF8000000U;
RegSize = REGION_16M;
Attrib = DEVICE_NONSHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/* 1M of device memory from 0xF9000000 to 0xF90FFFFF for RPU_A53_GIC */
Addr = 0xF9000000U;
RegSize = REGION_1M;
Attrib = DEVICE_NONSHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/* 16M of device memory from 0xFD000000 to 0xFDFFFFFF for FPS slaves */
Addr = 0xFD000000U;
RegSize = REGION_16M;
Attrib = DEVICE_NONSHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/* 16M of device memory from 0xFE000000 to 0xFEFFFFFF for Upper LPS slaves */
Addr = 0xFE000000U;
RegSize = REGION_16M;
Attrib = DEVICE_NONSHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/*
* 16M of device memory from 0xFF000000 to 0xFFFFFFFF for Lower LPS slaves,
* CSU, PMU, TCM, OCM
*/
Addr = 0xFF000000U;
RegSize = REGION_16M;
Attrib = DEVICE_NONSHARED | PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
RegNum++;
/* 256K of OCM RAM from 0xFFFC0000 to 0xFFFFFFFF marked as normal memory */
Addr = 0xFFFC0000U;
RegSize = REGION_256K;
Attrib = NORM_NSHARED_WB_WA| PRIV_RW_USER_RW ;
Xil_SetAttribute(Addr,RegSize,RegNum, Attrib);
/* A total of 10 MPU regions are allocated with another 6 being free for users */
}
/*****************************************************************************
*
* Set the memory attributes for a section of memory with starting address addr
* of the region size defined by reg_size having attributes attrib of region number
* reg_num
*
* @param addr is the address for which attributes are to be set.
* @param attrib specifies the attributes for that memory region.
* @param reg_size specifies the size for that memory region.
* @param reg_num specifies the number for that memory region.
* @return None.
*
*
******************************************************************************/
static void Xil_SetAttribute(u32 addr, u32 reg_size,s32 reg_num, u32 attrib)
{
u32 Local_reg_size = reg_size;
Local_reg_size = Local_reg_size<<1U;
Local_reg_size |= REGION_EN;
dsb();
mtcp(XREG_CP15_MPU_MEMORY_REG_NUMBER,reg_num);
isb();
mtcp(XREG_CP15_MPU_REG_BASEADDR,addr); /* Set base address of a region */
mtcp(XREG_CP15_MPU_REG_ACCESS_CTRL,attrib); /* Set the control attribute */
mtcp(XREG_CP15_MPU_REG_SIZE_EN,Local_reg_size); /* set the region size and enable it*/
dsb();
isb(); /* synchronize context on this processor */
}
/*****************************************************************************
*
* Disable all the MPU regions if any of them is enabled
*
* @param None.
*
* @return None.
*
*
******************************************************************************/
static void Xil_DisableMPURegions(void)
{
u32 Temp = 0U;
u32 Index = 0U;
for (Index = 0; Index <= 15; Index++) {
mtcp(XREG_CP15_MPU_MEMORY_REG_NUMBER,Index);
#if defined (__GNUC__)
Temp = mfcp(XREG_CP15_MPU_REG_SIZE_EN);
#elif defined (__ICCARM__)
mfcp(XREG_CP15_MPU_REG_SIZE_EN,Temp);
#endif
Temp &= (~REGION_EN);
dsb();
mtcp(XREG_CP15_MPU_REG_SIZE_EN,Temp);
dsb();
isb();
}
}
#if defined (__ICCARM__)
#pragma default_function_attributes =
#endif
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