The register of P2020

[敏赵]

Hi,

In p2020RDB-PC_init_core.tcl, I find the codes:

	# Set a breakpoint at the reset address
	reg ${SPR_GROUP}IAC1 = 0xfffffffc
	reg ${SPR_GROUP}DBCR0 = 0x40800000
	reg ${SPR_GROUP}DBCR1 = 0x00000000

What's the meaning of the codes?

Where can I find the field descriptions about SPR_GROUP?

Best regards,

Min Zhao

[addiyi]

Please take a look in processor reference manual for details about registers. Also, you have the possibility to have a quickly view over registers using Register Details from CodeWarrior. Just open CodeWarrior IDE and click on Register Details icon (see the attached screenshot).

Adrian

[敏赵]

I still have some confusion about the register.

In p2020RDB-PC_init_core.tcl, I find the codes:

  ##################################################################################

  # Memory Windows

  #

  # 0xFF000000 0xFFFFFFFF     LAW0      Local Bus NOR FLASH - 16M

  # 0xA0000000  0xBFFFFFFF    LAW1     PEX1 - 512M

  # 0xEFC20000  0xEFC2FFFF    LAW2     PEX1 - 64K

  # 0x80000000  0x9FFFFFFF     LAW3     PEX2 - 512M

  # 0xEFC10000  0xEFC1FFFF    LAW4    PEX2 - 64K

  #0xF8000000  0xF80FFFFF     LAW5       Local Bus NAND FLASH 1M

  # 0x00000000 0x3FFFFFFF     LAW11      DDRC - 1G

  #

  ##################################################################################

  # configure local access windows

  # LAWBAR0 - Local Bus

  # bit 8 - 31 = 0xFF000000 - base addr

  mem [CCSR 0xc08] = 0x000ff000

##################################################################################

In my board,I have a 4GB DDR,32MB NOR, so I must use 36-bit.

How should I set the Registers? I found they only can use 32-bit?

For example my NOR's base address is 0xF_FE000000,

then  mem [CCSR 0xc08] = ?

Best regards,

Min Zhao

[addiyi · Accepted solution]

If you want to set NOR base address to 0xF_FE00_0000, then LAWBAR0 will be:

mem [CCSR 0xc08] = 0x00FFE000

Note that the minimun size of any LAW is 4Kbytes, so the 12 lowest-order bits of the base address cannot be specified. You can find more information in processor reference manual.

Adrian