Re: [PATCH] Add performance monitoring unit extension

Sean Anderson

On 10/29/20 7:40 PM, Tommy Thorn wrote:

+    counter_info[20] = Type (0 = HARDWARE and 1 = SOFTWARE)
+    counter_info[XLEN-1:21] = Reserved for future use
+If `counter_info.type == 0x1` then `counter_info.csr` should be ignored
+and `counter_info.width` is assumed to be XLEN.
Perhaps we should store the type in bit 31 to allow for easier
That wouldn’t help 64-bit targets much.  Did you mean bit XLEN-1?



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