How sptbr update flush TLBs in RocketChip?
I am using RocketChip and reading some parts of code.
As the ASID is still not used in current implementation. I assume each "csrw sptbr" will flush the whole TLB.
However, it seems tlb flush is triggered by fence_i signal. But csrw itself will not generate such signal in decode stage. (I may misunderstand something ..)
So how the sptbr update will trigger the TLB flush?
Any comments are welcomed! Thanks!
rocket-chip
asked Nov 19 '18 at 7:39
user3138826user3138826
63
add a comment |
I am using RocketChip and reading some parts of code.
As the ASID is still not used in current implementation. I assume each "csrw sptbr" will flush the whole TLB.
However, it seems tlb flush is triggered by fence_i signal. But csrw itself will not generate such signal in decode stage. (I may misunderstand something ..)
So how the sptbr update will trigger the TLB flush?
Any comments are welcomed! Thanks!
rocket-chip
asked Nov 19 '18 at 7:39
user3138826user3138826
63
add a comment |
I am using RocketChip and reading some parts of code.
As the ASID is still not used in current implementation. I assume each "csrw sptbr" will flush the whole TLB.
However, it seems tlb flush is triggered by fence_i signal. But csrw itself will not generate such signal in decode stage. (I may misunderstand something ..)
So how the sptbr update will trigger the TLB flush?
Any comments are welcomed! Thanks!
rocket-chip
asked Nov 19 '18 at 7:39
user3138826user3138826
63
I am using RocketChip and reading some parts of code.
As the ASID is still not used in current implementation. I assume each "csrw sptbr" will flush the whole TLB.
However, it seems tlb flush is triggered by fence_i signal. But csrw itself will not generate such signal in decode stage. (I may misunderstand something ..)
So how the sptbr update will trigger the TLB flush?
Any comments are welcomed! Thanks!
rocket-chip
rocket-chip
asked Nov 19 '18 at 7:39
user3138826user3138826
63
asked Nov 19 '18 at 7:39
user3138826user3138826
63
asked Nov 19 '18 at 7:39
user3138826user3138826
63
asked Nov 19 '18 at 7:39
user3138826user3138826
63
asked Nov 19 '18 at 7:39
user3138826user3138826
63
63
add a comment |
add a comment |
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