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/* Mapping of csr addresses to their names. */
val csr_name_map : csreg <-> string
scattered mapping csr_name_map
/* user trap setup */
mapping clause csr_name_map = 0x000 <-> "ustatus"
mapping clause csr_name_map = 0x004 <-> "uie"
mapping clause csr_name_map = 0x005 <-> "utvec"
/* user trap handling */
mapping clause csr_name_map = 0x040 <-> "uscratch"
mapping clause csr_name_map = 0x041 <-> "uepc"
mapping clause csr_name_map = 0x042 <-> "ucause"
mapping clause csr_name_map = 0x043 <-> "utval"
mapping clause csr_name_map = 0x044 <-> "uip"
/* user floating-point context */
mapping clause csr_name_map = 0x001 <-> "fflags"
mapping clause csr_name_map = 0x002 <-> "frm"
mapping clause csr_name_map = 0x003 <-> "fcsr"
/* counter/timers */
mapping clause csr_name_map = 0xC00 <-> "cycle"
mapping clause csr_name_map = 0xC01 <-> "time"
mapping clause csr_name_map = 0xC02 <-> "instret"
mapping clause csr_name_map = 0xC80 <-> "cycleh"
mapping clause csr_name_map = 0xC81 <-> "timeh"
mapping clause csr_name_map = 0xC82 <-> "instreth"
/* TODO: other hpm counters */
/* supervisor trap setup */
mapping clause csr_name_map = 0x100 <-> "sstatus"
mapping clause csr_name_map = 0x102 <-> "sedeleg"
mapping clause csr_name_map = 0x103 <-> "sideleg"
mapping clause csr_name_map = 0x104 <-> "sie"
mapping clause csr_name_map = 0x105 <-> "stvec"
mapping clause csr_name_map = 0x106 <-> "scounteren"
/* supervisor trap handling */
mapping clause csr_name_map = 0x140 <-> "sscratch"
mapping clause csr_name_map = 0x141 <-> "sepc"
mapping clause csr_name_map = 0x142 <-> "scause"
mapping clause csr_name_map = 0x143 <-> "stval"
mapping clause csr_name_map = 0x144 <-> "sip"
/* supervisor protection and translation */
mapping clause csr_name_map = 0x180 <-> "satp"
/* machine information registers */
mapping clause csr_name_map = 0xF11 <-> "mvendorid"
mapping clause csr_name_map = 0xF12 <-> "marchid"
mapping clause csr_name_map = 0xF13 <-> "mimpid"
mapping clause csr_name_map = 0xF14 <-> "mhartid"
/* machine trap setup */
mapping clause csr_name_map = 0x300 <-> "mstatus"
mapping clause csr_name_map = 0x301 <-> "misa"
mapping clause csr_name_map = 0x302 <-> "medeleg"
mapping clause csr_name_map = 0x303 <-> "mideleg"
mapping clause csr_name_map = 0x304 <-> "mie"
mapping clause csr_name_map = 0x305 <-> "mtvec"
mapping clause csr_name_map = 0x306 <-> "mcounteren"
mapping clause csr_name_map = 0x320 <-> "mcountinhibit"
/* machine trap handling */
mapping clause csr_name_map = 0x340 <-> "mscratch"
mapping clause csr_name_map = 0x341 <-> "mepc"
mapping clause csr_name_map = 0x342 <-> "mcause"
mapping clause csr_name_map = 0x343 <-> "mtval"
mapping clause csr_name_map = 0x344 <-> "mip"
/* machine protection and translation */
mapping clause csr_name_map = 0x3A0 <-> "pmpcfg0"
mapping clause csr_name_map = 0x3A1 <-> "pmpcfg1"
mapping clause csr_name_map = 0x3A2 <-> "pmpcfg2"
mapping clause csr_name_map = 0x3A3 <-> "pmpcfg3"
mapping clause csr_name_map = 0x3B0 <-> "pmpaddr0"
mapping clause csr_name_map = 0x3B1 <-> "pmpaddr1"
mapping clause csr_name_map = 0x3B2 <-> "pmpaddr2"
mapping clause csr_name_map = 0x3B3 <-> "pmpaddr3"
mapping clause csr_name_map = 0x3B4 <-> "pmpaddr4"
mapping clause csr_name_map = 0x3B5 <-> "pmpaddr5"
mapping clause csr_name_map = 0x3B6 <-> "pmpaddr6"
mapping clause csr_name_map = 0x3B7 <-> "pmpaddr7"
mapping clause csr_name_map = 0x3B8 <-> "pmpaddr8"
mapping clause csr_name_map = 0x3B9 <-> "pmpaddr9"
mapping clause csr_name_map = 0x3BA <-> "pmpaddr10"
mapping clause csr_name_map = 0x3BB <-> "pmpaddr11"
mapping clause csr_name_map = 0x3BC <-> "pmpaddr12"
mapping clause csr_name_map = 0x3BD <-> "pmpaddr13"
mapping clause csr_name_map = 0x3BE <-> "pmpaddr14"
mapping clause csr_name_map = 0x3BF <-> "pmpaddr15"
/* machine counters/timers */
mapping clause csr_name_map = 0xB00 <-> "mcycle"
mapping clause csr_name_map = 0xB02 <-> "minstret"
mapping clause csr_name_map = 0xB80 <-> "mcycleh"
mapping clause csr_name_map = 0xB82 <-> "minstreth"
/* TODO: other hpm counters and events */
/* trigger/debug */
mapping clause csr_name_map = 0x7a0 <-> "tselect"
mapping clause csr_name_map = 0x7a1 <-> "tdata1"
mapping clause csr_name_map = 0x7a2 <-> "tdata2"
mapping clause csr_name_map = 0x7a3 <-> "tdata3"
val csr_name : csreg -> string
overload to_str = {csr_name}
/* Extensions may want to add additional CSR registers to the CSR address map.
* These scattered 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
*/
val ext_is_CSR_defined : (csreg, Privilege) -> bool effect {rreg}
scattered function ext_is_CSR_defined
/* returns the value of the CSR if it is defined */
val ext_read_CSR : csreg -> option(xlenbits) effect {rreg}
scattered function ext_read_CSR
/* returns new value (after legalisation) if the CSR is defined */
val ext_write_CSR : (csreg, xlenbits) -> option(xlenbits) effect {rreg, wreg}
scattered function ext_write_CSR
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