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    2G内存D1开发板源码编译的镜像启动错误:DRAM: Unhandled exception: Store/AMO access fault

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    • E
      elliott LV 4 last edited by

      购买了2G内存D1开发板;
      下载了官方的Tina-D1源码仓库,并根据文档编译完成并烧写;
      但是,烧写进2G内存D1开发板后,启动出现错误;而在另一个1G内存的D1开发版上缺没有问题!
      请问我应该怎么修改源码呢?是要修改U-boot的内存相关的配置吗?

      U-Boot 2018.05-ge10e002-dirty (Apr 29 2021 - 09:21:10 +0000) Allwinner Technology
      
      [00.505]DRAM:  Unhandled exception: Store/AMO access fault
      EPC: 000000004207002c TVAL: 00000000bf4cffb8
      ### ERROR ### Please RESET the board ###
      

      如下图:
      Screenshot from 2021-06-04 16-48-40.png

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      • Kirin
        陈塘关李靖 LV 6 last edited by

        2G板子的话,要更新到最新的SDK Tina D1 v1.01版本

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        • E
          elliott LV 4 @Kirin last edited by

          @kirin 好、多谢提示!

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          • E
            elliott LV 4 last edited by

            更新一下修复方案:

            问题发生在u-boot-2018/common/board_f.c文件的reserve_board()函数的memset()进行写内存时;
            原512M内存的代码在U-Boot运行会出现错误,是由于opensbi的PMP设置中,0xbfxxxxxx地址没有访问权限,故触发异常错误

            支持D1 2G内存的主要patch在opensbi的sunxi_platform.c文件sunxi_pmp_region_info()函数中的PMP设置;

            正常运行的opensbi:

            MIDELEG : 0x0000000000000222
            MEDELEG : 0x000000000000b1ff
            PMP0    : 0x0000000040000000-0x000000004001ffff (A)
            PMP1    : 0x0000000040000000-0x000000007fffffff (A,R,W,X)
            PMP2    : 0x0000000080000000-0x00000000bfffffff (A,R,W,X)
            PMP3    : 0x0000000000020000-0x0000000000027fff (A,
            

            异常:

            MIDELEG : 0x0000000000000222
            MEDELEG : 0x000000000000b1ff
            PMP0    : 0x0000000040000000-0x000000004001ffff (A)
            PMP1    : 0x0000000040000000-0x000000007fffffff (A,R,W,X)
            PMP2    : 0x0000000000000000-0x0000000007ffffff (A,R,W)
            PMP3    : 0x0000000009000000-0x000000000901ffff (
            
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