ZHCABB2 应用手册 | 德州仪器 TI.com.cn

ZHCABB2 June 2021 DRA821U , DRA829J , DRA829V , TDA4VM , TDA4VM-Q1

6.1 示例

在为系统进行定制时，应查看存储器映射以确定必须保护的任何区域，并查看应保护的存储器区域。如果 A72 不需要访问权限，则可以有选择性地对该存储器设置防火墙。

参考来自 Processor SDK QNX 7.1 的系统存储器映射，可以生成表 6-1。在该表中，可以查看存储器区域以识别对防火墙有意义的存储器范围，防止 A72 访问。

有了这些防火墙，所有 Vision Apps SDK 演示都将继续运行。如果 A72 软件无意中试图访问任何受防火墙保护的存储器区域，则会发生异常。

表 6-1 用于识别存储器范围的存储器区域

名称	起始地址	结束地址	大小	属性	说明
L2RAM_C66x_1	0x00800000	0x00837FFF	224.00 KB	RWIX	L2 for C66x_1
L2RAM_C66x_2	0x00800000	0x00837FFF	224.00 KB	RWIX	L2 for C66x_2
MAIN_OCRAM_ MCU2_0	0x03600000	0x0361FFFF	128.00 KB	RWIX	Main OCRAM for MCU2_0
MAIN_OCRAM_ MCU2_1	0x03620000	0x0363FFFF	128.00 KB	RWIX	Main OCRAM for MCU2_1
L2RAM_C7x_1	0x64800000	0x64877FFF	480.00 KB	RWIX	L2 for C7x_1
L1RAM_C7x_1	0x64E00000	0x64E03FFF	16.00 KB	RWIX	L1 for C7x_1
MSMC_MPU1	0x70000000	0x7001FFFF	128.00 KB	RWIX	MSMC reserved for MPU1 for ATF
MSMC_C7x_1	0x70020000	0x707E7FFF	7.78 MB	RWIX	MSMC for C7x_1
MSMC_DMSC	0x707F0000	0x707FFFFF	64.00 KB	RWIX	MSMC reserved for DMSC IPC
DDR_MCU1_0_IPC	0xA0000000	0xA00FFFFF	1024.00 KB	RWIX	DDR for MCU1_0 for Linux IPC
DDR_MCU1_0_ RESOURCE_TABLE	0xA0100000	0xA01003FF	1024 B	RWIX	DDR for MCU1_0 for Linux resource table
DDR_MCU1_0	0xA0100400	0xA0FFFFFF	15.00 MB	RWIX	DDR for MCU1_0 for code/data
DDR_MCU2_0_IPC	0xA1000000	0xA10FFFFF	1024.00 KB	RWIX	DDR for MCU2_0 for Linux IPC
DDR_MCU2_0_ RESOURCE_TABLE	0xA1100000	0xA11003FF	1024 B	RWIX	DDR for MCU2_0 for Linux resource table
DDR_MCU2_0	0xA1100400	0xA2FFFFFF	31.00 MB	RWIX	DDR for MCU2_0 for code/data
DDR_MCU2_1_IPC	0xA3000000	0xA30FFFFF	1024.00 KB	RWIX	DDR for MCU2_1 for Linux IPC
DDR_MCU2_1_ RESOURCE_TABLE	0xA3100000	0xA31003FF	1024 B	RWIX	DDR for MCU2_1 for Linux resource table
DDR_MCU2_1	0xA3100400	0xA4FFFFFF	31.00 MB	RWIX	DDR for MCU2_1 for code/data
DDR_MCU3_0_IPC	0xA5000000	0xA50FFFFF	1024.00 KB	RWIX	DDR for MCU3_0 for Linux IPC
DDR_MCU3_0_ RESOURCE_TABLE	0xA5100000	0xA51003FF	1024 B	RWIX	DDR for MCU3_0 for Linux resource table
DDR_MCU3_0	0xA5100400	0xA57FFFFF	7.00 MB	RWIX	DDR for MCU3_0 for code/data
DDR_MCU3_1_IPC	0xA5800000	0xA58FFFFF	1024.00 KB	RWIX	DDR for MCU3_1 for Linux IPC
DDR_MCU3_1_ RESOURCE_TABLE	0xA5900000	0xA59003FF	1024 B	RWIX	DDR for MCU3_1 for Linux resource table
DDR_MCU3_1	0xA5900400	0xA5FFFFFF	7.00 MB	RWIX	DDR for MCU3_1 for code/data
DDR_C66x_2_IPC	0xA6000000	0xA60FFFFF	1024.00 KB	RWIX	DDR for C66x_2 for Linux IPC
DDR_C66x_1_ RESOURCE_TABLE	0xA6100000	0xA61003FF	1024 B	RWIX	DDR for C66x_1 for Linux resource table
DDR_C66x_1_BOOT	0xA6200000	0xA62003FF	1024 B	RWIX	DDR for C66x_1 for boot section
DDR_C66x_1	0xA6200400	0xA6FFFFFF	14.00 MB	RWIX	DDR for C66x_1 for code/data
DDR_C66x_1_IPC	0xA7000000	0xA70FFFFF	1024.00 KB	RWIX	DDR for C66x_1 for Linux IPC
DDR_C66x_2_ RESOURCE_TABLE	0xA7100000	0xA71003FF	1024 B	RWIX	DDR for C66x_2 for Linux resource table
DDR_C66x_2_BOOT	0xA7200000	0xA72003FF	1024 B	RWIX	DDR for C66x_2 for boot section
DDR_C66x_2	0xA7200400	0xA7FFFFFF	14.00 MB	RWIX	DDR for C66x_2 for code/data
DDR_C7x_1_IPC	0xA8000000	0xA80FFFFF	1024.00 KB	RWIX	DDR for C7x_1 for Linux IPC
DDR_C7x_1_ RESOURCE_TABLE	0xA8100000	0xA81003FF	1024 B	RWIX	DDR for C7x_1 for Linux resource table
DDR_C7x_1_BOOT	0xA8200000	0xA82003FF	1024 B	RWIX	DDR for C7x_1 for boot section
DDR_C7x_1_VECS	0xA8400000	0xA8403FFF	16.00 KB	RWIX	DDR for C7x_1 for vecs section
DDR_C7x_1_ SECURE_VECS	0xA8600000	0xA8603FFF	16.00 KB	RWIX	DDR for C7x_1 for secure vecs section
DDR_C7x_1	0xA8604000	0xA8FFFFFF	9.98 MB	RWIX	DDR for C7x_1 for code/data
IPC_VRING_MEM	0xAA000000	0xABFFFFFF	32.00 MB		Memory for IPC Vring's.MUST be non-cached or cache-coherent
APP_LOG_MEM	0xAC000000	0xAC03FFFF	256.00 KB		Memory for remote core logging
TIOVX_OBJ_ DESC_MEM	0xAC040000	0xADFDFFFF	31.62 MB		Memory for TI OpenVX shared memory.MUST be non-cached or cache-coherent
PCIE_QUEUE_ SHARED_MEM	0xADFE0000	0xADFEFFFF	64.00 KB		Memory for IPC over PCIe using shared memory.MUST be non-cached or cache-coherent
PCIE_QUEUE_ MIRROR_REMOTE_ SHARED_MEM	0xADFF0000	0xADFFFFFF	64.00 KB		Reserved Memory for RAT mapping of remote PCIe IPC shared memory.MUST be non-cached or cache-coherent
DDR_SHARED_MEM	0xAE000000	0xCDFFFFFF	512.00 MB		Memory for shared memory buffers in DDR
DDR_MCU2_0_ NON_CACHE	0xCE000000	0xCE00FFFF	64.00 KB	RWIX	DDR for MCU2_0 for non-cached heap
DDR_MCU2_1_ NON_CACHE	0xCE010000	0xD1FFFFFF	63.94 MB	RWIX	DDR for MCU2_1 for non-cached heap
DDR_MCU1_0_ LOCAL_HEAP	0xD2000000	0xD21FFFFF	2.00 MB	RWIX	DDR for MCU1_0 for local heap
DDR_MCU1_1_ LOCAL_HEAP	0xD2200000	0xD23FFFFF	2.00 MB	RWIX	DDR for MCU1_1 for local heap
DDR_MCU2_0_ LOCAL_HEAP	0xD2400000	0xD2BFFFFF	8.00 MB	RWIX	DDR for MCU2_0 for local heap
DDR_MCU2_1_ LOCAL_HEAP	0xD2C00000	0xD3BFFFFF	16.00 MB	RWIX	DDR for MCU2_1 for local heap
DDR_MCU3_0_ LOCAL_HEAP	0xD3C00000	0xD3DFFFFF	2.00 MB	RWIX	DDR for MCU3_0 for local heap
DDR_MCU3_1_ LOCAL_HEAP	0xD3E00000	0xD3FFFFFF	2.00 MB	RWIX	DDR for MCU3_1 for local heap
DDR_C66X_1_ LOCAL_HEAP	0xD4000000	0xD4FFFFFF	16.00 MB	RWIX	DDR for c66x_1 for local heap
DDR_C66X_1_ SCRATCH	0xD5000000	0xD7FFFFFF	48.00 MB	RWIX	DDR for c66x_1 for Scratch Memory
DDR_C66X_2_ LOCAL_HEAP	0xD8000000	0xD8FFFFFF	16.00 MB	RWIX	DDR for c66x_2 for local heap
DDR_C66X_2_ SCRATCH	0xD9000000	0xDBFFFFFF	48.00 MB	RWIX	DDR for c66x_2 for Scratch Memory
DDR_C7X_1_ LOCAL_HEAP	0xDC000000	0xEBFFFFFF	256.00 MB	RWIX	DDR for c7x_1 for local heap
DDR_C7X_1_ SCRATCH	0xEC000000	0xF9FFFFFF	224.00 MB	RWIX	DDR for c7x_1 for Scratch Memory
TIOVX_LOG_ RT_MEM	0xFA000000	0xFAFFFFFF	16.00 MB		Memory for TI OpenVX shared memory for Run-time logging.MUST be non-cached or cache-coherent
DDR_MCU1_1_IPC	0xFB000000	0xFB0FFFFF	1024.00 KB	RWIX	DDR for MCU1_1 for Linux IPC
DDR_MCU1_1_ RESOURCE_TABLE	0xFB100000	0xFB1003FF	1024 B	RWIX	DDR for MCU1_1 for Linux resource table
DDR_MCU1_1	0xFB100400	0xFBFFFFFF	15.00 MB	RWIX	DDR for MCU1_1 for code/data

使用该表并结合要设置防火墙保护的相邻存储器区域，以下 2 个 DDR 范围涵盖了 A72 不应访问的所有存储器位置。

起始地址	终止地址
0XA0000000	0XA8FFFFFF
0xCE000000	0xFBFFFFFF

若要防止 A72 访问这两个存储器范围，必须为每个存储器配置一个防火墙区域，并将区域权限指定为不允许任何 A72 访问。在以下示例代码中，A72 主防火墙的区域 0 设置为允许来自 A72 的所有访问，而区域 1 和区域 2 设置为防止 A72 访问需要设置防火墙保护的存储器范围。从 A72 的角度来看，可访问存储器的结果视图如下图所示。

图 6-1 示例代码