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rocket-chip
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updated riscv-bmarks and riscv-tests to build with new toolchain

This commit is contained in:
Rimas Avizienis 2011-11-15 00:11:22 -08:00
parent db87924fbf
commit 48cec01710
3 changed files with 109 additions and 46 deletions
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12
rocket/src/main/scala/cpu.scala
View File

@ -53,12 +53,11 @@ class rocketProc extends Component
dpath.io.host ^^ io.host;
ctrl.io.host.start := io.host.start;
dpath.io.debug ^^ io.debug;
// dpath.io.imem.resp_data ^^ io.imem.resp_data;
// FIXME: make this less verbose
// FIXME: try to make this more compact
// connect ITLB to I$, ctrl, dpath
itlb.io.cpu.invalidate := dpath.io.ptbr_wen || ctrl.io.flush_inst;
itlb.io.cpu.invalidate := dpath.io.ptbr_wen;
itlb.io.cpu.status := dpath.io.ctrl.status;
itlb.io.cpu.req_val := ctrl.io.imem.req_val;
itlb.io.cpu.req_asid := Bits(0,ASID_BITS); // FIXME: connect to PCR
@ -76,7 +75,6 @@ class rocketProc extends Component
// connect DTLB to D$ arbiter, ctrl+dpath
// dtlb.io.cpu.invalidate := Bool(false); // FIXME
dtlb.io.cpu.invalidate := dpath.io.ptbr_wen;
dtlb.io.cpu.status := dpath.io.ctrl.status;
dtlb.io.cpu.req_val := ctrl.io.dmem.req_val;
@ -99,14 +97,10 @@ class rocketProc extends Component
arb.io.mem ^^ io.dmem
// connect arbiter to ctrl+dpath+DTLB
// arb.io.cpu.req_val := dtlb.io.cpu.resp_val;
arb.io.cpu.req_val := ctrl.io.dmem.req_val;
arb.io.cpu.req_cmd := ctrl.io.dmem.req_cmd;
arb.io.cpu.req_type := ctrl.io.dmem.req_type;
// arb.io.cpu.dtlb_busy := dtlb.io.cpu.resp_busy;
arb.io.cpu.dtlb_miss := dtlb.io.cpu.resp_miss;
// arb.io.cpu.req_addr := dtlb.io.cpu.resp_addr;
arb.io.cpu.req_idx := dpath.io.dmem.req_addr(PGIDX_BITS-1,0);
arb.io.cpu.req_ppn := dtlb.io.cpu.resp_ppn;
arb.io.cpu.req_data := dpath.io.dmem.req_data;

139
rocket/src/main/scala/dcache.scala
View File

@ -48,7 +48,7 @@ class rocketDCacheStoreGen extends Component {
val req_type = Bits(3, 'input);
val req_addr_lsb = Bits(3, 'input);
val req_data = Bits(64, 'input);
val store_wmask = Bits(64, 'output);
val store_wmask = Bits(8, 'output);
val store_data = Bits(64, 'output);
}
@ -86,16 +86,8 @@ class rocketDCacheStoreGen extends Component {
Mux(io.req_type === MT_D, wmask_d,
UFix(0, 8)))));
io.store_wmask :=
Cat(Fill(8, store_wmask_byte(7)),
Fill(8, store_wmask_byte(6)),
Fill(8, store_wmask_byte(5)),
Fill(8, store_wmask_byte(4)),
Fill(8, store_wmask_byte(3)),
Fill(8, store_wmask_byte(2)),
Fill(8, store_wmask_byte(1)),
Fill(8, store_wmask_byte(0)));
io.store_wmask := store_wmask_byte;
io.store_data :=
Mux(io.req_type === MT_B, Fill(8, io.req_data( 7,0)),
Mux(io.req_type === MT_H, Fill(4, io.req_data(15,0)),
@ -183,7 +175,7 @@ class rocketDCacheDM(lines: Int) extends Component {
val offsetmsb = indexlsb-1;
val offsetlsb = 3;
val s_reset :: s_ready :: s_replay_load :: s_start_writeback :: s_writeback :: s_req_refill :: s_refill :: s_resolve_miss :: Nil = Enum(8) { UFix() };
val s_reset :: s_ready :: s_replay_load :: s_write_amo :: s_start_writeback :: s_writeback :: s_req_refill :: s_refill :: s_resolve_miss :: Nil = Enum(9) { UFix() };
val state = Reg(resetVal = s_reset);
// idx arrives one clock cycle prior to ppn b/c of DTLB
@ -194,6 +186,7 @@ class rocketDCacheDM(lines: Int) extends Component {
val r_cpu_req_type = Reg(resetVal = Bits(0,3));
val r_cpu_req_tag = Reg(resetVal = Bits(0,5));
val r_cpu_resp_val = Reg(resetVal = Bool(false));
val r_amo_data = Reg(resetVal = Bits(0,64));
val p_store_data = Reg(resetVal = Bits(0,64));
val p_store_idx = Reg(resetVal = Bits(0,PGIDX_BITS));
@ -203,11 +196,13 @@ class rocketDCacheDM(lines: Int) extends Component {
val req_store = (io.cpu.req_cmd === M_XWR);
val req_load = (io.cpu.req_cmd === M_XRD) || (io.cpu.req_cmd === M_PRD);
val req_flush = (io.cpu.req_cmd === M_FLA);
val req_amo = io.cpu.req_cmd(3).toBool;
val r_req_load = (r_cpu_req_cmd === M_XRD) || (r_cpu_req_cmd === M_PRD);
val r_req_store = (r_cpu_req_cmd === M_XWR);
val r_req_flush = (r_cpu_req_cmd === M_FLA);
val r_req_ptw_load = (r_cpu_req_cmd === M_PRD);
val r_req_amo = r_cpu_req_cmd(3).toBool;
when (io.cpu.req_val && io.cpu.req_rdy) {
r_cpu_req_idx <== io.cpu.req_idx;
r_cpu_req_cmd <== io.cpu.req_cmd;
@ -273,7 +268,7 @@ class rocketDCacheDM(lines: Int) extends Component {
// load/store addresses conflict if they are to any part of the same 64 bit word
val addr_match = (r_cpu_req_idx(PGIDX_BITS-1,offsetlsb) === p_store_idx(PGIDX_BITS-1,offsetlsb));
val ldst_conflict = tag_valid && tag_match && r_req_load && p_store_valid && addr_match;
val ldst_conflict = tag_valid && tag_match && (r_req_load || r_req_amo) && p_store_valid && addr_match;
val store_hit = r_cpu_req_val && !io.cpu.dtlb_miss && tag_hit && r_req_store ;
// write the pending store data when the cache is idle, when the next command isn't a load
@ -297,6 +292,10 @@ class rocketDCacheDM(lines: Int) extends Component {
p_store_type <== io.cpu.req_type;
}
when (io.cpu.req_val && io.cpu.req_rdy && req_amo) {
r_amo_data <== io.cpu.req_data;
}
when (store_hit && !drain_store) {
p_store_valid <== Bool(true);
}
@ -304,52 +303,85 @@ class rocketDCacheDM(lines: Int) extends Component {
p_store_valid <== Bool(false);
db_array <== db_array.bitSet(p_store_idx(PGIDX_BITS-1,offsetbits).toUFix, UFix(1,1));
}
when (resolve_store) {
when (resolve_store || (state === s_write_amo)) {
db_array <== db_array.bitSet(p_store_idx(PGIDX_BITS-1,offsetbits).toUFix, UFix(1,1));
}
when (tag_we) {
db_array <== db_array.bitSet(r_cpu_req_idx(PGIDX_BITS-1,offsetbits).toUFix, UFix(0,1));
}
// generate write mask and data signals for stores
// generate write mask and data signals for stores and amos
val storegen = new rocketDCacheStoreGen();
storegen.io.req_addr_lsb := p_store_idx(2,0);
storegen.io.req_data := p_store_data;
storegen.io.req_type := p_store_type
storegen.io.req_type := p_store_type;
val store_data = Fill(2, storegen.io.store_data);
val store_wmask_d = storegen.io.store_wmask;
val store_wmask_b = storegen.io.store_wmask;
val store_wmask_d = Cat(Fill(8, store_wmask_b(7)),
Fill(8, store_wmask_b(6)),
Fill(8, store_wmask_b(5)),
Fill(8, store_wmask_b(4)),
Fill(8, store_wmask_b(3)),
Fill(8, store_wmask_b(2)),
Fill(8, store_wmask_b(1)),
Fill(8, store_wmask_b(0)));
val store_idx_sel = p_store_idx(offsetlsb).toBool;
val store_wmask = Mux(store_idx_sel, Cat(store_wmask_d, Bits(0,64)), Cat(Bits(0,64), store_wmask_d));
// data array
val data_array = new rocketSRAMsp(lines*4, 128);
val data_array_rdata = data_array.io.q;
val resp_data = Mux(r_cpu_req_idx(offsetlsb).toBool, data_array_rdata(127, 64), data_array_rdata(63,0));
val r_resp_data = Reg(resp_data);
// ALU for AMOs
val amo_wmask =
Mux(r_cpu_req_type === MT_D, ~Bits(0,8),
Mux(r_cpu_req_idx(2).toBool, Cat(~Bits(0,4), Bits(0,4)),
Cat(Bits(0,4), ~Bits(0,4))));
val amo_alu = new rocketDCacheAmoALU();
amo_alu.io.cmd := r_cpu_req_cmd;
amo_alu.io.wmask := amo_wmask;
amo_alu.io.lhs := r_resp_data.toUFix;
amo_alu.io.rhs := r_amo_data.toUFix;
val amo_alu_out = amo_alu.io.result;
data_array.io.a :=
Mux(drain_store || resolve_store, p_store_idx(PGIDX_BITS-1, offsetmsb-1),
Mux((state === s_writeback) && io.mem.req_rdy, Cat(r_cpu_req_idx(PGIDX_BITS-1, offsetbits), rr_count_next),
Mux((state === s_start_writeback) || (state === s_writeback) || (state === s_refill), Cat(r_cpu_req_idx(PGIDX_BITS-1, offsetbits), rr_count),
Mux((state === s_resolve_miss) || (state === s_replay_load), r_cpu_req_idx(PGIDX_BITS-1, offsetmsb-1),
Mux((state === s_resolve_miss) || (state === s_replay_load) || (state === s_write_amo), r_cpu_req_idx(PGIDX_BITS-1, offsetmsb-1),
io.cpu.req_idx(PGIDX_BITS-1, offsetmsb-1))))).toUFix;
data_array.io.d := Mux((state === s_refill), io.mem.resp_data, store_data);
data_array.io.we := ((state === s_refill) && io.mem.resp_val) || drain_store || resolve_store;
data_array.io.d :=
Mux((state === s_refill), io.mem.resp_data,
Mux((state === s_write_amo), amo_alu_out,
store_data));
data_array.io.we :=
((state === s_refill) && io.mem.resp_val) ||
(state === s_write_amo) ||
drain_store || resolve_store;
data_array.io.bweb := Mux((state === s_refill), ~Bits(0,128), store_wmask);
data_array.io.ce :=
(io.cpu.req_val && io.cpu.req_rdy && req_load) ||
(io.cpu.req_val && io.cpu.req_rdy && (req_load || req_amo)) ||
(state === s_start_writeback) ||
(state === s_writeback) ||
((state === s_resolve_miss) && r_req_load) ||
((state === s_resolve_miss) && (r_req_load || r_req_amo)) ||
(state === s_replay_load);
val data_array_rdata = data_array.io.q;
// signal a load miss when the data isn't present in the cache and when it's in the pending store data register
// (causes the cache to block for 2 cycles and the load instruction is replayed)
val load_miss = !io.cpu.dtlb_miss && (state === s_ready) && r_cpu_req_val && r_req_load && (!tag_hit || (p_store_valid && addr_match));
// (causes the cache to block for 2 cycles and the load or amo instruction is replayed)
val load_miss =
!io.cpu.dtlb_miss &&
(state === s_ready) && r_cpu_req_val && (r_req_load || r_req_amo) && (!tag_hit || (p_store_valid && addr_match));
// output signals
// busy when there's a load to the same address as a pending store, or on a cache miss, or when executing a flush
io.cpu.req_rdy := (state === s_ready) && !io.cpu.dtlb_miss && !ldst_conflict && (!r_cpu_req_val || (tag_hit && !r_req_flush));
io.cpu.resp_val := !io.cpu.dtlb_miss && ((state === s_ready) && tag_hit && r_req_load && !(p_store_valid && addr_match)) ||
io.cpu.req_rdy := (state === s_ready) && !io.cpu.dtlb_miss && !ldst_conflict && (!r_cpu_req_val || (tag_hit && !(r_req_flush || r_req_amo)));
io.cpu.resp_val := !io.cpu.dtlb_miss &&
((state === s_ready) && tag_hit && (r_req_load || r_req_amo) && !(p_store_valid && addr_match)) ||
((state === s_resolve_miss) && r_req_flush) ||
r_cpu_resp_val;
@ -358,15 +390,13 @@ class rocketDCacheDM(lines: Int) extends Component {
(((r_cpu_req_type === MT_W) || (r_cpu_req_type === MT_WU)) && (r_cpu_req_idx(1,0) != Bits(0,2))) ||
((r_cpu_req_type === MT_D) && (r_cpu_req_idx(2,0) != Bits(0,3)));
io.cpu.xcpt_ma_ld := r_cpu_req_val && r_req_load && misaligned;
io.cpu.xcpt_ma_st := r_cpu_req_val && r_req_store && misaligned;
io.cpu.xcpt_ma_ld := r_cpu_req_val && (r_req_load || r_req_amo) && misaligned;
io.cpu.xcpt_ma_st := r_cpu_req_val && (r_req_store || r_req_amo) && misaligned;
io.cpu.resp_miss := load_miss;
// tag MSB distinguishes between loads destined for the PTW and CPU
io.cpu.resp_tag := Cat(r_req_ptw_load, r_cpu_req_type, r_cpu_req_idx(2,0), r_cpu_req_tag);
io.cpu.resp_data :=
Mux(r_cpu_req_idx(offsetlsb).toBool, data_array_rdata(127, 64),
data_array_rdata(63,0));
io.cpu.resp_data := resp_data;
io.mem.req_val := (state === s_req_refill) || (state === s_writeback);
io.mem.req_rw := (state === s_writeback);
@ -388,9 +418,12 @@ class rocketDCacheDM(lines: Int) extends Component {
when (ldst_conflict) {
state <== s_replay_load;
}
when (!r_cpu_req_val || (tag_hit && !r_req_flush)) {
when (!r_cpu_req_val || (tag_hit && !(r_req_flush || r_req_amo))) {
state <== s_ready;
}
when (tag_hit && r_req_amo) {
state <== s_write_amo;
}
when (tag_valid & tag_dirty) {
state <== s_start_writeback;
}
@ -404,6 +437,9 @@ class rocketDCacheDM(lines: Int) extends Component {
is (s_replay_load) {
state <== s_ready;
}
is (s_write_amo) {
state <== s_ready;
}
is (s_start_writeback) {
state <== s_writeback;
}
@ -425,9 +461,42 @@ class rocketDCacheDM(lines: Int) extends Component {
when (io.mem.resp_val && (rr_count === UFix(3,2))) { state <== s_resolve_miss; }
}
is (s_resolve_miss) {
when (r_req_amo) {
state <== s_write_amo;
}
state <== s_ready;
}
}
}
class rocketDCacheAmoALU extends Component {
val io = new Bundle {
val cmd = Bits(4, 'input);
val wmask = Bits(8, 'input);
val lhs = UFix(64, 'input);
val rhs = UFix(64, 'input);
val result = UFix(64, 'output);
}
// val signed_cmp = (op === M_XA_MIN) || (op === M_XA_MAX);
// val sub = (op === M_XA_MIN) || (op === M_XA_MINU) ||
// (op === M_XA_MAX) || (op === M_XA_MAXU);
val adder_lhs = Cat(io.lhs(63,32),io.wmask(3) & io.lhs(31), io.lhs(30,0)).toUFix;
val adder_rhs = Cat(io.rhs(63,32),io.wmask(3) & io.rhs(31), io.rhs(30,0)).toUFix;
// val adder_rhs = Cat(Mux(sub, ~io.rhs, io.rhs), sub).toUFix;
// val sum = adder_lhs + adder_rhs;
// val adder_out = sum(64,1);
val adder_out = adder_lhs + adder_rhs;
val alu_out = Wire() { UFix() };
switch (io.cmd) {
// is (M_XA_ADD) { alu_out <== adder_out; }
is (M_XA_SWAP) { alu_out <== io.rhs; }
is (M_XA_AND) { alu_out <== io.lhs & io.rhs; }
is (M_XA_OR) { alu_out <== io.lhs | io.rhs; }
}
alu_out <== adder_out;
io.result := alu_out;
}
}

4
rocket/src/main/scala/dpath.scala
View File

@ -45,7 +45,7 @@ class rocketDpath extends Component
val alu = new rocketDpathALU();
val ex_alu_out = alu.io.out;
val ex_jr_target = ex_alu_out(31,0);
val ex_jr_target = ex_alu_out(VADDR_BITS,0);
val div = new rocketDivider(64);
val div_result = div.io.div_result_bits;
@ -342,7 +342,7 @@ class rocketDpath extends Component
// D$ request interface (registered inside D$ module)
// other signals (req_val, req_rdy) connect to control module
io.dmem.req_addr := ex_alu_out(PADDR_BITS-1,0);
io.dmem.req_addr := ex_alu_out(VADDR_BITS-1,0);
io.dmem.req_data := ex_reg_rs2;
io.dmem.req_tag := ex_reg_waddr;