diff options
Diffstat (limited to 'risc-v')
| -rw-r--r-- | risc-v/riscv.sail | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/risc-v/riscv.sail b/risc-v/riscv.sail index c5b19d26..55a672ad 100644 --- a/risc-v/riscv.sail +++ b/risc-v/riscv.sail @@ -60,13 +60,24 @@ function forall 'a. 'a effect { escape } not_implemented((string) message) = exit message; } +function unit effect { escape } check_alignment( (bit[64]) addr, (nat) width) = +{ + if (unsigned(addr) quot width != 0) then + exit "misaligned memory access"; +} + + val extern forall Nat 'n. ( bit[64] , [|'n|] ) -> (bit[8 * 'n]) effect { rmem } MEMr val extern forall Nat 'n. ( bit[64] , [|'n|] ) -> (bit[8 * 'n]) effect { rmem } MEMr_acquire val extern forall Nat 'n. ( bit[64] , [|'n|] ) -> (bit[8 * 'n]) effect { rmem } MEMr_strong_acquire val extern forall Nat 'n. ( bit[64] , [|'n|] ) -> (bit[8 * 'n]) effect { rmem } MEMr_reserved val extern forall Nat 'n. ( bit[64] , [|'n|] ) -> (bit[8 * 'n]) effect { rmem } MEMr_reserved_acquire val extern forall Nat 'n. ( bit[64] , [|'n|] ) -> (bit[8 * 'n]) effect { rmem } MEMr_reserved_strong_acquire -function forall Nat 'n. (bit[8 * 'n]) effect { rmem } mem_read( (bit[64]) addr, ([|'n|]) width, (bool) aq, (bool) rl, (bool) res) = +function forall Nat 'n. (bit[8 * 'n]) effect { rmem, escape } mem_read( (bit[64]) addr, ([|'n|]) width, (bool) aq, (bool) rl, (bool) res) = +{ + if (aq | res) then + check_alignment(addr, width); + switch (aq, rl, res) { case (false, false, false) -> MEMr(addr, width) case (true, false, false) -> MEMr_acquire(addr, width) @@ -77,6 +88,7 @@ function forall Nat 'n. (bit[8 * 'n]) effect { rmem } mem_read( (bit[64]) addr, case (false, true, true) -> not_implemented("lr.rl is not implemented") case (true, true, true) -> MEMr_reserved_strong_acquire(addr, width) } +} val extern forall Nat 'n. ( bit[64] , [|'n|]) -> unit effect { eamem } MEMea val extern forall Nat 'n. ( bit[64] , [|'n|]) -> unit effect { eamem } MEMea_release @@ -84,7 +96,11 @@ val extern forall Nat 'n. ( bit[64] , [|'n|]) -> unit effect { eamem } MEMea_str val extern forall Nat 'n. ( bit[64] , [|'n|]) -> unit effect { eamem } MEMea_conditional val extern forall Nat 'n. ( bit[64] , [|'n|]) -> unit effect { eamem } MEMea_conditional_release val extern forall Nat 'n. ( bit[64] , [|'n|]) -> unit effect { eamem } MEMea_conditional_strong_release -function forall Nat 'n. unit effect { eamem } mem_write_ea( (bit[64]) addr , ([|'n|]) width, (bool) aq, (bool) rl, (bool) con) = +function forall Nat 'n. unit effect { eamem, escape } mem_write_ea( (bit[64]) addr , ([|'n|]) width, (bool) aq, (bool) rl, (bool) con) = +{ + if (rl | con) then + check_alignment(addr, width); + switch (aq, rl, con) { case (false, false, false) -> MEMea(addr, width) case (false, true, false) -> MEMea_release(addr, width) @@ -95,6 +111,7 @@ function forall Nat 'n. unit effect { eamem } mem_write_ea( (bit[64]) addr , ([| case (true, false, true) -> not_implemented("sc.aq is not implemented") case (true, true , true) -> MEMea_conditional_strong_release(addr, width) } +} val extern forall Nat 'n. ( bit[64] , [|'n|] , bit[8*'n]) -> unit effect { wmv } MEMval val extern forall Nat 'n. ( bit[64] , [|'n|] , bit[8*'n]) -> unit effect { wmv } MEMval_release @@ -102,7 +119,11 @@ val extern forall Nat 'n. ( bit[64] , [|'n|] , bit[8*'n]) -> unit effect { wmv } val extern forall Nat 'n. ( bit[64] , [|'n|] , bit[8*'n]) -> unit effect { wmv } MEMval_conditional val extern forall Nat 'n. ( bit[64] , [|'n|] , bit[8*'n]) -> unit effect { wmv } MEMval_conditional_release val extern forall Nat 'n. ( bit[64] , [|'n|] , bit[8*'n]) -> unit effect { wmv } MEMval_conditional_strong_release -function forall Nat 'n. unit effect { wmv } mem_write_value( (bit[64]) addr , ([|'n|]) width , (bit[8*'n]) value, (bool) aq, (bool) rl, (bool) con) = +function forall Nat 'n. unit effect { wmv, escape } mem_write_value( (bit[64]) addr , ([|'n|]) width , (bit[8*'n]) value, (bool) aq, (bool) rl, (bool) con) = +{ + if (rl | con) then + check_alignment(addr, width); + switch (aq, rl, con) { case (false, false, false) -> MEMval(addr, width, value) case (false, true, false) -> MEMval_release(addr, width, value) @@ -113,6 +134,7 @@ function forall Nat 'n. unit effect { wmv } mem_write_value( (bit[64]) addr , ([ case (true, false, true) -> not_implemented("sc.aq is not implemented") case (true, true, true) -> MEMval_conditional_strong_release(addr, width, value) } +} val extern unit -> bool effect {exmem} speculate_conditional_success @@ -427,6 +449,7 @@ function clause decode (0b11000 : [aq] : [rl] : (regno) rs2 : (regno) rs1 : 0b01 function clause decode (0b11000 : [aq] : [rl] : (regno) rs2 : (regno) rs1 : 0b011 : (regno) rd : 0b0101111) = Some(AMO(AMOMINU, aq, rl, rs2, rs1, DOUBLE, rd)) function clause decode (0b11100 : [aq] : [rl] : (regno) rs2 : (regno) rs1 : 0b010 : (regno) rd : 0b0101111) = Some(AMO(AMOMAXU, aq, rl, rs2, rs1, WORD, rd)) function clause decode (0b11100 : [aq] : [rl] : (regno) rs2 : (regno) rs1 : 0b011 : (regno) rd : 0b0101111) = Some(AMO(AMOMAXU, aq, rl, rs2, rs1, DOUBLE, rd)) + function clause execute (AMO(op, aq, rl, rs2, rs1, width, rd)) = { (bit[64]) addr := rGPR(rs1); |