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vr_ad reset check

Ravisinha
Hi all, When we define as vr_ad reg_fld for each reg_file we used to provide the reset value of each field. As i know the application for this is when we call reset() function for that reg_file it will overwritten with a reset value whatever we have assigned. My doubt here is can it be use for doing a reset check.. For example whenever i do a read of some register i need not to provide the extra check method in my code for checking the reset value and it should be done automatically with vr_ad compare_and_update() method w.r.t the reset value of corresponding reg_def. Thanks Ravi
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  • Hi Ravi.

    vr_ad doesn't explicitly cover or check for reset values, however if you reset a register and subsequently read it before writing it, then the value you read and check will be the reset value. In this case vr_ad will be checking the reset value implicitly.

    If you look at the vrad/examples/vr_ad_reg_sequence_lib.e you'll find some helpful pre-defined register sequences. For example the CHECK_RESET_VALUES sequence will go through all the registers checking their reset values. You can evenoverride the list of registers so that the sequence checks only a specific subset of the registers, or you can use it to force the order of checking.

    If you need some coverage to tell whether a register's reset value was read, you could easily extend the base vr_ad_reg with a new boolean field that gets set TRUE by the reset() method, and cleared after covering its value in post_access(). Thus when the flag is covered TRUE you know you've checked the reset value for that register.

    Hope this helps.

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  • Hi Ravi.

    vr_ad doesn't explicitly cover or check for reset values, however if you reset a register and subsequently read it before writing it, then the value you read and check will be the reset value. In this case vr_ad will be checking the reset value implicitly.

    If you look at the vrad/examples/vr_ad_reg_sequence_lib.e you'll find some helpful pre-defined register sequences. For example the CHECK_RESET_VALUES sequence will go through all the registers checking their reset values. You can evenoverride the list of registers so that the sequence checks only a specific subset of the registers, or you can use it to force the order of checking.

    If you need some coverage to tell whether a register's reset value was read, you could easily extend the base vr_ad_reg with a new boolean field that gets set TRUE by the reset() method, and cleared after covering its value in post_access(). Thus when the flag is covered TRUE you know you've checked the reset value for that register.

    Hope this helps.

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