arch/armv8-m: Add SAU support
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao
Masayuki Ishikawa
parent
06cf12617c
commit
4b41579ccf
116
arch/arm/src/armv8-m/arm_sau.c
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116
arch/arm/src/armv8-m/arm_sau.c
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/****************************************************************************
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* arch/arm/src/armv8-m/arm_sau.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "sau.h"
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#include "arm_internal.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* The next available region number */
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static uint8_t g_region;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sau_allocregion
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*
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* Description:
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* Allocate the next region
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*
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* Assumptions:
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* - Regions are never deallocated
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* - Regions are only allocated early in initialization, so no special
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* protection against re-entrancy is required;
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*
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****************************************************************************/
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static unsigned int sau_allocregion(void)
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{
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return (unsigned int)g_region++;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sau_control
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*
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* Description:
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* Configure and enable (or disable) the SAU
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*
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****************************************************************************/
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void sau_control(bool enable, bool allns)
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{
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uint32_t regval = 0;
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if (enable)
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{
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regval |= SAU_CTRL_ENABLE; /* Enable the SAU */
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}
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else if (allns)
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{
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regval |= SAU_CTRL_ALLNS; /* All region non-secure */
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}
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putreg32(regval, SAU_CTRL);
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}
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/****************************************************************************
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* Name: sau_configure_region
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*
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* Description:
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* Configure a region for secure attribute
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*
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****************************************************************************/
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void sau_configure_region(uintptr_t base, size_t size, uint32_t flags)
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{
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unsigned int region = sau_allocregion();
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uintptr_t limit;
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/* Ensure the base address alignment */
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limit = (base + size) & SAU_RLAR_LIMIT_MASK;
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base &= SAU_RBAR_BASE_MASK;
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/* Select the region */
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putreg32(region, SAU_RNR);
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/* Set the region base, limit and attribute */
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putreg32(base, SAU_RBAR);
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putreg32(limit | flags | SAU_RLAR_ENABLE, SAU_RLAR);
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}
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178
arch/arm/src/armv8-m/sau.h
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178
arch/arm/src/armv8-m/sau.h
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/****************************************************************************
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* arch/arm/src/armv8-m/sau.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_ARMV8M_SAU_H
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#define __ARCH_ARM_SRC_ARMV8M_SAU_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifndef __ASSEMBLY__
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# include <stdint.h>
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# include <stdbool.h>
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# include <debug.h>
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#endif
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* SAU Register Bases */
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#define SAU_BASE 0xe000edd0
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/* SAU Register Offsets */
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#define SAU_CTRL_OFFSET 0x0000 /* SAU Control Register */
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#define SAU_TYPE_OFFSET 0x0004 /* SAU Type Register */
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#define SAU_RNR_OFFSET 0x0008 /* SAU Region Number Register */
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#define SAU_RBAR_OFFSET 0x000c /* SAU Region Base Address Register */
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#define SAU_RLAR_OFFSET 0x0010 /* SAU Region Limit Address Register */
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#define SAU_SFSR_OFFSET 0x0014 /* Secure Fault Status Register */
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#define SAU_SFAR_OFFSET 0x0018 /* Secure Fault Address Register */
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/* SAU Register Addresses */
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#define SAU_CTRL (SAU_BASE + SAU_CTRL_OFFSET)
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#define SAU_TYPE (SAU_BASE + SAU_TYPE_OFFSET)
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#define SAU_RNR (SAU_BASE + SAU_RNR_OFFSET)
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#define SAU_RBAR (SAU_BASE + SAU_RBAR_OFFSET)
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#define SAU_RLAR (SAU_BASE + SAU_RLAR_OFFSET)
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#define SAU_SFSR (SAU_BASE + SAU_SFSR_OFFSET)
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#define SAU_SFAR (SAU_BASE + SAU_SFAR_OFFSET)
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/* SAU Control Register Bit Definitions */
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#define SAU_CTRL_ENABLE (1 << 0) /* Bit 0: Enable the SAU */
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#define SAU_CTRL_ALLNS (1 << 1) /* Bit 1: All Non-secure */
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/* SAU Type Register Bit Definitions */
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#define SAU_TYPE_SREGION_SHIFT (0) /* Bits 0-7: Number SAU regions */
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#define SAU_TYPE_SREGION_MASK (0xff << SAU_TYPE_SREGION_SHIFT)
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/* SAU Region Base Address Register Bit Definitions */
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#define SAU_RBAR_BASE_MASK 0xffffffe0 /* Bits 5-31: Region base addrese */
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/* SAU Region Region Limit Address Register Bit Definitions */
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#define SAU_RLAR_ENABLE (1 << 0) /* Bit 0: Region enable */
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#define SAU_RLAR_NSC (1 << 1) /* Bit 1: Non-secure callable */
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#define SAU_RLAR_LIMIT_MASK 0xffffffe0 /* Bits 5-31: Region limit address */
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: sau_control
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*
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* Description:
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* Configure and enable (or disable) the SAU
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*
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****************************************************************************/
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void sau_control(bool enable, bool allns);
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/****************************************************************************
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* Name: sau_configure_region
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*
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* Description:
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* Configure a region for secure attribute
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*
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****************************************************************************/
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void sau_configure_region(uintptr_t base, size_t size, uint32_t flags);
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/****************************************************************************
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* Inline Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sau_showtype
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*
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* Description:
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* Show the characteristics of the SAU
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*
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****************************************************************************/
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#ifdef CONFIG_DEBUG_SCHED_INFO
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# define sau_showtype() \
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do \
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{ \
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uint32_t regval = getreg32(SAU_TYPE); \
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sinfo("SAU Regions: %d\n", \
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(regval & SAU_TYPE_SREGION_MASK) >> SAU_TYPE_SREGION_SHIFT); \
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} while (0)
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#else
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# define sau_showtype() do { } while (0)
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#endif
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/****************************************************************************
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* Name: sau_non_secure
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*
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* Description:
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* Configure a non-secure region
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*
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****************************************************************************/
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#define sau_non_secure(base, size) \
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do \
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{ \
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/* The configure the region */ \
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sau_configure_region(base, size, 0); \
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} while (0)
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/****************************************************************************
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* Name: sau_non_secure_callable
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*
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* Description:
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* Configure a non-secure callable region
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*
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****************************************************************************/
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#define sau_non_secure_callable(base, size) \
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do \
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{ \
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/* The configure the region */ \
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sau_configure_region(base, size, SAU_RLAR_NSC); \
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} while (0)
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_ARMV8M_SAU_H */
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