About C6678 mpax register

user4489731

Hi,everyone,

About C6678 MPAX,I have some questions as following:

in the document SPRP820,section 7,there is a usecase as following:

It is 36 bit physical address,how can I look the physical address's data?in CCS memory browser only can look 32 bit logical address.

In MPAX_registerDemo,the value of MPAXH is 0x90000017,For core1,the value of MPAXL is 0x8110003;For core2,the value of MPAXL is 0x8120003f.

After I run MPAX_registerDemo,I find every core can use the address of 0x91000000,B1000000,D1000000,F1000000 to access core1 pravite data,use the address of 0x92000000,B2000000,D2000000,F2000000 to access core 2 private data and so on,why?

What's the relationship between RADDR and BADDR？

Thank you,

Simon

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Moved this thread to keystone forum. Thank you.

0 Raja over 10 years ago in reply to Raja

TI__Guru* 81335 points

As per this example, The same logical addresses (0x9000 0000 - 0x90FF FFFF)) have a different physical address for each core.

H_Value = 0x90000017    ;

    if (coreNum == 0) L_Value = 0x8100003f    ;

    if (coreNum == 1) L_Value = 0x8110003f    ;

    if (coreNum == 2) L_Value = 0x8120003f    ;

    if (coreNum == 3) L_Value = 0x8130003f    ;

    if (coreNum == 4) L_Value = 0x8140003f    ;

    if (coreNum == 5) L_Value = 0x8150003f    ;

    if (coreNum == 6) L_Value = 0x8160003f    ;

    if (coreNum == 7) L_Value = 0x8170003f    ;

Core -> Physical Address(start to end) -> Logical Address (Start to End)

Core 0 -> 8 1000 0000 to 8 10ff ffff –> 9000 0000 to 90ff ffff

Core 1 -> 8 1100 0000 to 8 11ff ffff –> 9000 0000 to 90ff ffff

Core 2 -> 8 1200 0000 to 8 12ff ffff –> 9000 0000 to 90ff ffff

Core 3 -> 8 1300 0000 to 8 13ff ffff –> 9000 0000 to 90ff ffff

Core 4 -> 8 1400 0000 to 8 14ff ffff –> 9000 0000 to 90ff ffff

Core 5 -> 8 1500 0000 to 8 15ff ffff –> 9000 0000 to 90ff ffff

Core 6 -> 8 1600 0000 to 8 16ff ffff –> 9000 0000 to 90ff ffff

Core 7 -> 8 1700 0000 to 8 17ff ffff-> 9000 0000 to 90ff ffff

Thank you.