【分享】 在Vivado里关闭R5/GPU,降低Xilinx MPSoC的功耗

 

1. Vivado里关闭R5/A53/GPU

有些应用中,需要降低Xilinx MPSoC的功耗。缺省设置中,R5/GPU都被使能。如果需要省电,可以在Vivado里关闭R5/GPU。步骤如下:

  1. 选中 MPSoC IP,在右键菜单中选择Block Properties.
  2. 在窗口Block Properties中,选择Properties.

 

 

  1. 在窗口中,展开 “Config”.

  2. 在搜索框中输入 “Power”, 出现PSU_RPU_POWER_ON等选项。如果值是1,表示被使能;如果值是0,表示被关闭。如果要关闭,点击最左边的编辑图标,输入0。

编辑前Power选项

 

编辑后Power选项

 

在Vivado里编辑完成后,执行“Generate Output Products”, 在导出Hardware的HDF/XSA文件。

2. JTAG检查R5/A53状态

在SDK/Vitis里创建FSBL和Standalone程序,启动后,在XSCT命令后窗口下,检查R5/A53状态,可以看到设置为0的R5/A53的状态是No Power。

xsct% connect
tcfchan#2
xsct% target
  1  PS TAP
     2  PMU
     3  PL
  4  PSU
     5  RPU (Reset)
        6  Cortex-R5 #0 (No Power)
        7  Cortex-R5 #1 (No Power)
     8  APU
        9  Cortex-A53 #0 (Running)
       10  Cortex-A53 #1 (Power On Reset)
       11  Cortex-A53 #2 (No Power)
       12  Cortex-A53 #3 (No Power)

3. 代码
代码在psu_init.c里的函数psu_peripherals_powerdwn_data( )里。

/*

  • POWER DOWN REQUEST INTERRUPT ENABLE
    /
    /

  • Register : REQ_PWRDWN_INT_EN @ 0XFFD80218

  • Power-down Request Interrupt Enable for Dual_R5

  • PSU_PMU_GLOBAL_REQ_PWRDWN_INT_EN_RPU 1

  • Power-down Request Interrupt Enable for GPU PP0

  • PSU_PMU_GLOBAL_REQ_PWRDWN_INT_EN_PP0 1

  • Power-down Request Interrupt Enable for GPU PP1

  • PSU_PMU_GLOBAL_REQ_PWRDWN_INT_EN_PP1 1

  • Power-down Request Interrupt Enable for ACPU2

  • PSU_PMU_GLOBAL_REQ_PWRDWN_INT_EN_ACPU2 1

  • Power-down Request Interrupt Enable for ACPU3

  • PSU_PMU_GLOBAL_REQ_PWRDWN_INT_EN_ACPU3 1

  • Power-down Request Interrupt Enable Register. Writing a 1 to this locati

  • on will unmask the Interrupt.

  • (OFFSET, MASK, VALUE) (0XFFD80218, 0x0000043CU ,0x0000043CU)
    /
    PSU_Mask_Write(PMU_GLOBAL_REQ_PWRDWN_INT_EN_OFFSET,
    0x0000043CU, 0x0000043CU);
    /##################################################################### */

/*

    • POWER DOWN TRIGGER
      /
      /

    • Register : REQ_PWRDWN_TRIG @ 0XFFD80220

    • Power-down Request Trigger for Dual_R5

    • PSU_PMU_GLOBAL_REQ_PWRDWN_TRIG_RPU 1

    • Power-down Request Trigger for GPU PP0

    • PSU_PMU_GLOBAL_REQ_PWRDWN_TRIG_PP0 1

    • Power-down Request Trigger for GPU PP1

    • PSU_PMU_GLOBAL_REQ_PWRDWN_TRIG_PP1 1

    • Power-down Request Trigger for ACPU2

    • PSU_PMU_GLOBAL_REQ_PWRDWN_TRIG_ACPU2 1

    • Power-down Request Trigger for ACPU3

    • PSU_PMU_GLOBAL_REQ_PWRDWN_TRIG_ACPU3 1

    • Power-down Request Trigger Register. Writing a 1 to this location will t

    • rigger a power-down request to the PMU.

    • (OFFSET, MASK, VALUE) (0XFFD80220, 0x0000043CU ,0x0000043CU)
      /
      PSU_Mask_Write(PMU_GLOBAL_REQ_PWRDWN_TRIG_OFFSET,
      0x0000043CU, 0x0000043CU);
      /##################################################################### */



posted @ 2020-05-27 16:48  HankFu  阅读(1254)  评论(0编辑  收藏  举报