-
Notifications
You must be signed in to change notification settings - Fork 159
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add Smctr, Ssctr, Smcsrind, Sscsrind, Smstateen
- Loading branch information
Showing
18 changed files
with
829 additions
and
3 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,210 @@ | ||
| /*=======================================================================================*/ | ||
| /* This Sail RISC-V architecture model, comprising all files and */ | ||
| /* directories except where otherwise noted is subject the BSD */ | ||
| /* two-clause license in the LICENSE file. */ | ||
| /* */ | ||
| /* SPDX-License-Identifier: BSD-2-Clause */ | ||
| /*=======================================================================================*/ | ||
|
|
||
| /* Support CTR depths - if bit n is set then CTR depth 2^n is supported */ | ||
| val sys_valid_ctr_depth = {c: "sys_valid_ctr_depth", ocaml: "Platform.valid_ctr_depth", _: "sys_valid_ctr_depth"} : unit -> bits(64) | ||
|
|
||
| /* Architectural state for the Ssctr and Smctr standard extension. */ | ||
| bitfield Mctrctl : bits(64) = { | ||
| DIRLJMPINH : 47, | ||
| INDLJMPINH : 46, | ||
| RETINH : 45, | ||
| CORSWAPINH : 44, | ||
| DIRJMPINH : 43, | ||
| INDJMPINH : 42, | ||
| DIRCALLINH : 41, | ||
| INDCALLINH : 40, | ||
| TKBRINH : 37, | ||
| NTBREN : 36, | ||
| TRETINH : 35, | ||
| INTRINH : 34, | ||
| EXCINH : 33, | ||
|
|
||
| LCOFIFRZ : 12, | ||
| BPFRZ : 11, | ||
|
|
||
| MTE : 9, | ||
| STE : 8, | ||
|
|
||
| RASEMU : 7, | ||
|
|
||
| M : 2, | ||
| S : 1, | ||
| U : 0 | ||
| } | ||
| bitfield Sctrctl : bits(64) = { | ||
| DIRLJMPINH : 47, | ||
| INDLJMPINH : 46, | ||
| RETINH : 45, | ||
| CORSWAPINH : 44, | ||
| DIRJMPINH : 43, | ||
| INDJMPINH : 42, | ||
| DIRCALLINH : 41, | ||
| INDCALLINH : 40, | ||
| TKBRINH : 37, | ||
| NTBREN : 36, | ||
| TRETINH : 35, | ||
| INTRINH : 34, | ||
| EXCINH : 33, | ||
|
|
||
| LCOFIFRZ : 12, | ||
| BPFRZ : 11, | ||
|
|
||
| STE : 8, | ||
|
|
||
| RASEMU : 7, | ||
|
|
||
| S : 1, | ||
| U : 0 | ||
| } | ||
| bitfield Sctrdepth : bits(32) = { | ||
| DEPTH : 2 .. 0 | ||
| } | ||
| bitfield Sctrstatus : bits(32) = { | ||
| FROZEN : 31, | ||
| WRPTR : 7 .. 0 | ||
| } | ||
| bitfield Ctrsource : xlenbits = { | ||
| PC : xlen - 1 .. 1, | ||
| V : 0 | ||
| } | ||
| bitfield Ctrtarget : xlenbits = { | ||
| PC : xlen - 1 .. 1, | ||
| MISP : 0 | ||
| } | ||
| bitfield Ctrdata : bits(64) = { | ||
| CCE : 31 .. 28, | ||
| CCM : 27 .. 16, | ||
| CCV : 15, | ||
| TYPE : 3 .. 0 | ||
| } | ||
|
|
||
| register sctrstatus : Sctrstatus | ||
| register sctrdepth : Sctrdepth | ||
| register mctrctl : Mctrctl | ||
| register ctrsource : vector(256, dec, Ctrsource) | ||
| register ctrtarget : vector(256, dec, Ctrtarget) | ||
| register ctrdata : vector(256, dec, Ctrdata) | ||
| /* Should parameterize the cycle counter to support wider counters */ | ||
| register ctr_cycle_counter : bits(13) | ||
| register ctr_cycle_counter_valid : bool | ||
|
|
||
| function legalize_mctrctl(o : Mctrctl, v : xlenbits) -> Mctrctl = { | ||
| let m : Mctrctl = Mk_Mctrctl(zero_extend(v)); | ||
| m | ||
| } | ||
|
|
||
| function lower_sctrctl(m : Mctrctl) -> Sctrctl = { | ||
| let s = Mk_Sctrctl(m.bits); | ||
| s | ||
| } | ||
|
|
||
| function legalize_sctrctl(m : Mctrctl, v : xlenbits) -> Mctrctl = { | ||
| let o = Mk_Mctrctl(zero_extend(v)); | ||
| let o = [o with M = m[M], MTE = m[MTE]]; | ||
| o | ||
| } | ||
|
|
||
|
|
||
| function get_wrptr_mask(d : Sctrdepth) -> bits(8) = | ||
| match(d[DEPTH]) { | ||
| 0b000 => 0b00001111, | ||
| 0b001 => 0b00011111, | ||
| 0b010 => 0b00111111, | ||
| 0b011 => 0b01111111, | ||
| 0b100 => 0b11111111, | ||
| _ => internal_error(__FILE__, __LINE__, "Unexpected DEPTH encoding") | ||
| } | ||
|
|
||
| function legalize_sctrdepth(s : Sctrdepth, v : xlenbits) -> Sctrdepth = { | ||
| let valid_ctr_depth : bits(64) = sys_valid_ctr_depth(); | ||
| let depth : bits(3) = match(v[2 .. 0]) { | ||
| 0b000 => if bit_to_bool(valid_ctr_depth[0]) then v[2 .. 0] else s[DEPTH], | ||
| 0b001 => if bit_to_bool(valid_ctr_depth[1]) then v[2 .. 0] else s[DEPTH], | ||
| 0b010 => if bit_to_bool(valid_ctr_depth[2]) then v[2 .. 0] else s[DEPTH], | ||
| 0b011 => if bit_to_bool(valid_ctr_depth[3]) then v[2 .. 0] else s[DEPTH], | ||
| 0b100 => if bit_to_bool(valid_ctr_depth[4]) then v[2 .. 0] else s[DEPTH], | ||
| _ => s[DEPTH] | ||
| }; | ||
| let o = Mk_Sctrdepth(zero_extend(depth)); | ||
|
|
||
| /* On depth change WRPTR assumes an unspecified but legal value */ | ||
| sctrstatus[WRPTR] = sctrstatus[WRPTR] & get_wrptr_mask(o); | ||
|
|
||
| o | ||
| } | ||
| function legalize_sctrstatus(s : Sctrstatus, v : xlenbits) -> Sctrstatus = { | ||
| let wrptr_mask : bits(8) = get_wrptr_mask(sctrdepth); | ||
| let o = Mk_Sctrstatus(zeros()); | ||
| let o = [o with WRPTR = (v[7 .. 0] & wrptr_mask), FROZEN = v[31 .. 31]]; | ||
| o | ||
| } | ||
| function number_of_ctr() -> int = { | ||
| let valid_ctr_depth : bits(64) = sys_valid_ctr_depth(); | ||
| let num = if bit_to_bool(valid_ctr_depth[0]) then 16 else 0; | ||
| let num = if bit_to_bool(valid_ctr_depth[1]) then 32 else num; | ||
| let num = if bit_to_bool(valid_ctr_depth[2]) then 64 else num; | ||
| let num = if bit_to_bool(valid_ctr_depth[3]) then 128 else num; | ||
| let num = if bit_to_bool(valid_ctr_depth[4]) then 256 else num; | ||
| num | ||
| } | ||
| function isValidCtrMiselect() -> bool = { | ||
| let ctr_select = miselect.bits[7 .. 0]; | ||
| haveSmctr() & (unsigned(ctr_select) < number_of_ctr()) | ||
| } | ||
| function isValidCtrSiselect() -> bool = { | ||
| let ctr_select = siselect.bits[7 .. 0]; | ||
| haveSsctr() & (unsigned(ctr_select) < number_of_ctr()) | ||
| } | ||
| /* Logical entry N, selected by *iselect value of (0x200 | N), is | ||
| * physically at ((WRPTR - N - 1) % depth) where depth = 2^(DEPTH+4) | ||
| */ | ||
| function get_ctr_idx(iselect : SMiselect) -> bits(8) = { | ||
| let ctr_idx = sctrstatus[WRPTR] - iselect.bits[7 .. 0] - 1; | ||
| ctr_idx & get_wrptr_mask(sctrdepth); | ||
| } | ||
|
|
||
| function get_ctr_mireg() -> xlenbits = | ||
| ctrsource[unsigned(get_ctr_idx(miselect))].bits | ||
|
|
||
| function get_ctr_mireg2() -> xlenbits = | ||
| ctrtarget[unsigned(get_ctr_idx(miselect))].bits | ||
|
|
||
| function get_ctr_mireg3() -> xlenbits = | ||
| if sizeof(xlen) == 32 | ||
| then ctrdata[unsigned(get_ctr_idx(miselect))].bits[31 .. 0] | ||
| else ctrdata[unsigned(get_ctr_idx(miselect))].bits[63 .. 0] | ||
|
|
||
| function set_ctr_mireg(v: xlenbits) -> unit = | ||
| ctrsource[unsigned(get_ctr_idx(miselect))] = Mk_Ctrsource(v) | ||
|
|
||
| function set_ctr_mireg2(v: xlenbits) -> unit = | ||
| ctrtarget[unsigned(get_ctr_idx(miselect))] = Mk_Ctrtarget(v) | ||
|
|
||
| function set_ctr_mireg3(v: xlenbits) -> unit = | ||
| ctrdata[unsigned(get_ctr_idx(miselect))] = Mk_Ctrdata(zero_extend(v)) | ||
|
|
||
| function get_ctr_sireg() -> xlenbits = | ||
| ctrsource[unsigned(get_ctr_idx(siselect))].bits | ||
|
|
||
| function get_ctr_sireg2() -> xlenbits = | ||
| ctrtarget[unsigned(get_ctr_idx(siselect))].bits | ||
|
|
||
| function get_ctr_sireg3() -> xlenbits = | ||
| if sizeof(xlen) == 32 | ||
| then ctrdata[unsigned(get_ctr_idx(miselect))].bits[31 .. 0] | ||
| else ctrdata[unsigned(get_ctr_idx(miselect))].bits[63 .. 0] | ||
|
|
||
| function set_ctr_sireg(v: xlenbits) -> unit = | ||
| ctrsource[unsigned(get_ctr_idx(siselect))] = Mk_Ctrsource(v) | ||
|
|
||
| function set_ctr_sireg2(v: xlenbits) -> unit = | ||
| ctrtarget[unsigned(get_ctr_idx(siselect))] = Mk_Ctrtarget(v) | ||
|
|
||
| function set_ctr_sireg3(v: xlenbits) -> unit = | ||
| ctrdata[unsigned(get_ctr_idx(siselect))] = Mk_Ctrdata(zero_extend(v)) |
Oops, something went wrong.