Corrected CSR addresses for HWLOOP*, FPREC, UHARTID, PRIVLV.

[Silabs-ArjanB]

Corrected CSR addresses for HWLOOP*, FPREC, UHARTID, PRIVLV. Cleaned up CSR defines.

CSR                     Old address     New address     Comment
---------------------------------------------------------------
HWLoop0_START           12'h7C0         12'h800         Needs to be User accessible (now in user custom read/write space)
HWLoop0_END             12'h7C1         12'h801         Needs to be User accessible (now in user custom read/write space)
HWLoop0_COUNTER         12'h7C2         12'h802         Needs to be User accessible (now in user custom read/write space)
HWLoop1_START           12'h7C4         12'h804         Needs to be User accessible (now in user custom read/write space)
HWLoop1_END             12'h7C5         12'h805         Needs to be User accessible (now in user custom read/write space)
HWLoop1_COUNTER         12'h7C6         12'h806         Needs to be User accessible (now in user custom read/write space)
FPREC                   12'h006         12'h807         Cannot be in Standard space (now in user custom read/write space)
UHARTID                 12'h014         12'hCC0         Cannot be in Standard space; should not be R/W (now in user custom read-only space)
PRIVLV                  12'hC10         12'hCC1         Cannot be in Standard space (also clashes) (now in user custom read-only space)

This fixes issue #142

Signed-off-by: Arjan Bink [email protected]

[davideschiavone]

As currently the HWLoop is undertest and the GCC support is not yet aligned with the new addresses, I am keeping this PR freeze until the PULP GCC is aligned.

[Silabs-ArjanB]

Please note that there is a corresponding PULP toolchain request: pulp-platform/pulp-riscv-gnu-toolchain#21

Do you have an estimate for when this merge can happen?

[Silabs-ArjanB]

Hi @davideschiavone We can no longer wait for PULP toolchain updates. I intend to merge this pull request coming Monday afternoon.