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/* Extensions may want to add additional CSR registers to the CSR address map.
* These functions support access to such registers.
*
* The default implementation provides access to the CSRs added by the 'N'
* extension.
*/
/* returns whether a CSR is defined and accessible at a given address
* and privilege
*/
function ext_is_CSR_defined(csr : csreg, p : Privilege) -> bool =
is_NExt_CSR_defined(csr, p) // 'N' extension
/* returns the value of the CSR if it is defined */
function ext_read_CSR(csr : csreg) -> option(xlenbits) =
read_NExt_CSR(csr)
/* returns false if the CSR is not defined or if the write is unsuccessful */
function ext_write_CSR(csr : csreg, value : xlenbits) -> bool =
write_NExt_CSR(csr, value)
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