riscv
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rocket-chip
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Better branch prediction

This commit is contained in:
Andrew Waterman 2014-04-07 16:08:06 -07:00
parent d055c0ebaf 8d68ea9e0b 16274a84b6
commit 817517c663
12 changed files with 153 additions and 64 deletions
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1
.gitignore vendored
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@ -1,2 +1,3 @@
target/
project/target
*.swp

2
Makefrag
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@ -109,6 +109,7 @@ asm_p_tests = \
rv64uf-p-fcmp \
rv64uf-p-fcvt \
rv64uf-p-fcvt_w \
rv64uf-p-fclass \
rv64uf-p-fadd \
rv64uf-p-fmin \
rv64uf-p-fmadd \
@ -205,6 +206,7 @@ asm_v_tests = \
rv64uf-v-fcmp \
rv64uf-v-fcvt \
rv64uf-v-fcvt_w \
rv64uf-v-fclass \
rv64uf-v-fadd \
rv64uf-v-fmin \
rv64uf-v-fmadd \

2
chisel

@ -1 +1 @@
Subproject commit 25a33ba1d456294fe4ebc79fe95339a0d9d20e8a
Subproject commit dff97c5b52e052637582eaaf7e819b7bf9d1953d

2
csrc/emulator.cc
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@ -139,7 +139,7 @@ int main(int argc, char** argv)
if (htif->exit_code())
{
fprintf(stderr, "*** FAILED *** (code = %d) after %lld cycles\n", htif->exit_code(), (long long)trace_count);
fprintf(stderr, "*** FAILED *** (code = %d, seed %d) after %lld cycles\n", htif->exit_code(), random_seed, (long long)trace_count);
ret = htif->exit_code();
}
else if (trace_count == max_cycles)

82
csrc/vcs_main.cc
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@ -8,12 +8,41 @@
#include <sstream>
#include <iterator>
static htif_emulator_t* htif = NULL;
static unsigned htif_bytes;
static mm_t* mm = NULL;
extern "C" {
extern int vcs_main(int argc, char** argv);
static htif_emulator_t* htif;
static unsigned htif_bytes;
static mm_t* mm;
static const char* loadmem;
void htif_fini(vc_handle failure)
{
delete htif;
htif = NULL;
exit(vc_getScalar(failure));
}
int main(int argc, char** argv)
{
bool dramsim = false;
for (int i = 1; i < argc; i++)
{
if (!strcmp(argv[i], "+dramsim"))
dramsim = true;
else if (!strncmp(argv[i], "+loadmem=", 9))
loadmem = argv[i]+9;
}
mm = dramsim ? (mm_t*)(new mm_dramsim2_t) : (mm_t*)(new mm_magic_t);
htif = new htif_emulator_t(std::vector<std::string>(argv + 1, argv + argc));
vcs_main(argc, argv);
abort(); // should never get here
}
void memory_tick(
vc_handle mem_req_val,
vc_handle mem_req_rdy,
@ -62,55 +91,18 @@ void memory_tick(
);
}
void htif_init
(
vc_handle htif_width,
vc_handle mem_width,
vc_handle argv,
vc_handle loadmem,
vc_handle dramsim
)
void htif_init(vc_handle htif_width, vc_handle mem_width)
{
int mw = vc_4stVectorRef(mem_width)->d;
mm = vc_getScalar(dramsim) ? (mm_t*)(new mm_dramsim2_t) : (mm_t*)(new mm_magic_t);
assert(mw && (mw & (mw-1)) == 0);
mm->init(MEM_SIZE, mw/8, LINE_SIZE);
if (loadmem)
load_mem(mm->get_data(), loadmem);
vec32* w = vc_4stVectorRef(htif_width);
assert(w->d <= 32 && w->d % 8 == 0); // htif_tick assumes data fits in a vec32
htif_bytes = w->d/8;
char loadmem_str[1024];
vc_VectorToString(loadmem, loadmem_str);
if (*loadmem_str)
load_mem(mm->get_data(), loadmem_str);
char argv_str[1024];
vc_VectorToString(argv, argv_str);
if (!*argv_str)
{
if (*loadmem_str)
strcpy(argv_str, "none");
else
{
fprintf(stderr, "Usage: ./simv [host options] +argv=\"<target program> [target args]\"\n");
exit(-1);
}
}
std::vector<std::string> args;
std::stringstream ss(argv_str);
std::istream_iterator<std::string> begin(ss), end;
std::copy(begin, end, std::back_inserter<std::vector<std::string>>(args));
htif = new htif_emulator_t(args);
}
void htif_fini(vc_handle failure)
{
delete htif;
htif = NULL;
exit(vc_getScalar(failure));
}
void htif_tick

2
hardfloat

@ -1 +1 @@
Subproject commit 39a08130d41ceb9e7f98fa7092fc38970009a460
Subproject commit 4a938b1aae6df5609400235448583c5c34b47da4

3
project/build.scala
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@ -31,7 +31,8 @@ object BuildSettings extends Build {
lazy val uncore = Project("uncore", file("uncore"), settings = buildSettings) dependsOn(hardfloat)
lazy val rocket = Project("rocket", file("rocket"), settings = buildSettings) dependsOn(uncore)
lazy val hwacha = Project("hwacha", file("hwacha"), settings = buildSettings) dependsOn(uncore, rocket)
lazy val referencechip = Project("referencechip", file("."), settings = buildSettings ++ chipSettings) dependsOn(rocket, hwacha)
lazy val rekall = Project("rekall", file("rekall"), settings = buildSettings) dependsOn(chisel)
lazy val referencechip = Project("referencechip", file("."), settings = buildSettings ++ chipSettings) dependsOn(rocket, hwacha, rekall)
val elaborateTask = InputKey[Unit]("elaborate", "convert chisel components into backend source code")
val makeTask = InputKey[Unit]("make", "trigger backend-specific makefile command")

2
riscv-tests

@ -1 +1 @@
Subproject commit ea6edc71edb84d9eb9241decd04ee3374a895f0c
Subproject commit 629d7edf826573a9bf297486999e23a7b745c44d

2
riscv-tools

@ -1 +1 @@
Subproject commit ebb909ab9dfff8387449faa5827d47eda693b70b
Subproject commit bc6bbf5024bc5297a928b8620ad0364e44d26cfe

2
rocket

@ -1 +1 @@
Subproject commit 49f633cd12de6e69479943d8089563edae7e03f5
Subproject commit ea4b1dfd17ac7e873f59f8c878dd0a214cf4f868

14
src/main/scala/RocketChip.scala
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@ -7,6 +7,7 @@ import rocket.Util._
import ReferenceChipBackend._
import scala.collection.mutable.ArrayBuffer
import scala.collection.mutable.HashMap
import DRAMModel._
object DummyTopLevelConstants {
val NTILES = 1
@ -39,7 +40,7 @@ class ReferenceChipBackend extends VerilogBackend
}
def addMemPin(c: Module) = {
for (node <- Module.nodes) {
for (mod <- Module.components; node <- mod.nodes) {
if (node.isInstanceOf[Mem[ _ ]] && node.component != null && node.asInstanceOf[Mem[_]].seqRead) {
connectMemPin(c, node.component, node)
}
@ -83,6 +84,8 @@ class ReferenceChipBackend extends VerilogBackend
transforms += ((c: Module) => collectNodesIntoComp(initializeDFS))
}
class Fame1ReferenceChipBackend extends ReferenceChipBackend with Fame1Transform
class OuterMemorySystem(htif_width: Int)(implicit conf: UncoreConfiguration) extends Module
{
implicit val (tl, ln, l2) = (conf.tl, conf.tl.ln, conf.l2)
@ -237,8 +240,9 @@ class MemDessert extends Module {
io.wide <> x.io.wide
}
class Top extends Module {
val co = if(ENABLE_SHARING) {
val co = if(ENABLE_SHARING) {
if(ENABLE_CLEAN_EXCLUSIVE) new MESICoherence
else new MSICoherence
} else {
@ -251,8 +255,8 @@ class Top extends Module {
implicit val l2 = L2CoherenceAgentConfiguration(tl, NL2_REL_XACTS, NL2_ACQ_XACTS)
implicit val uc = UncoreConfiguration(l2, tl, NTILES, NBANKS, bankIdLsb = 5, nSCR = 64)
val ic = ICacheConfig(128, 2, ntlb = 8, nbtb = 38)
val dc = DCacheConfig(128, 4, ntlb = 8,
val ic = ICacheConfig(128, 2, ntlb = 8, btb = BTBConfig(64, 2))
val dc = DCacheConfig(128, 4, ntlb = 8,
nmshr = NMSHRS, nrpq = 16, nsdq = 17, states = co.nClientStates)
val vic = ICacheConfig(128, 1)
val hc = hwacha.HwachaConfiguration(vic, dc, 8, 256, ndtlb = 8, nptlb = 2)
@ -295,3 +299,5 @@ class Top extends Module {
io.mem_backup_en <> uncore.io.mem_backup_en
io.mem <> uncore.io.mem
}

103
src/main/scala/fpga.scala
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@ -4,6 +4,7 @@ import Chisel._
import Node._
import uncore._
import rocket._
import DRAMModel._
class FPGAOuterMemorySystem(htif_width: Int)(implicit conf: UncoreConfiguration) extends Module
{
@ -77,10 +78,19 @@ class FPGAUncore(htif_width: Int)(implicit conf: UncoreConfiguration) extends Mo
htif.io.host.in <> io.host.in
}
class FPGATopIO(htifWidth: Int) extends TopIO(htifWidth)
class ReferenceChip(htif_width: Int) extends Module {
val io = new Bundle {
val host_in = new DecoupledIO(new HostPacket(htif_width)).flip()
val host_out = new DecoupledIO(new HostPacket(htif_width))
val host_clk = Bool(OUTPUT)
val host_clk_edge = Bool(OUTPUT)
val host_debug_stats_pcr = Bool(OUTPUT)
class FPGATop extends Module {
val htif_width = 16
val mem_req_cmd = new DecoupledIO(new MemReqCmd())
val mem_req_data = new DecoupledIO(new MemData())
val mem_resp = (new DecoupledIO(new MemResp())).flip()
}
val co = new MESICoherence
val ntiles = 1
val nbanks = 1
@ -90,13 +100,11 @@ class FPGATop extends Module {
implicit val l2 = L2CoherenceAgentConfiguration(tl, 1, 8)
implicit val uc = UncoreConfiguration(l2, tl, ntiles, nbanks, bankIdLsb = 5, nSCR = 64)
val ic = ICacheConfig(64, 1, ntlb = 4, nbtb = 4)
val ic = ICacheConfig(64, 1, ntlb = 4, btb = BTBConfig(4))
val dc = DCacheConfig(64, 1, ntlb = 4, nmshr = 2, nrpq = 16, nsdq = 17, states = co.nClientStates)
val rc = RocketConfiguration(tl, ic, dc, fpu = None,
fastMulDiv = false)
val io = new FPGATopIO(htif_width)
val resetSigs = Vec.fill(uc.nTiles){Bool()}
val tileList = (0 until uc.nTiles).map(r => Module(new Tile(resetSignal = resetSigs(r))(rc)))
val uncore = Module(new FPGAUncore(htif_width))
@ -118,9 +126,88 @@ class FPGATop extends Module {
hl.ipi_req <> Queue(tile.io.host.ipi_req)
tile.io.host.ipi_rep <> Queue(hl.ipi_rep)
}
io.host_in.ready := uncore.io.host.in.ready
uncore.io.host.in.bits := io.host_in.bits.data
uncore.io.host.in.valid := io.host_in.valid
uncore.io.host.out.ready := io.host_out.ready
io.host_out.bits.data := uncore.io.host.out.bits
io.host_out.valid := uncore.io.host.out.valid
io.host_clk := uncore.io.host.clk
io.host_clk_edge := uncore.io.host.clk_edge
io.host_debug_stats_pcr := uncore.io.host.debug_stats_pcr
io.host <> uncore.io.host
io.mem <> uncore.io.mem
io.mem_req_cmd <> uncore.io.mem.req_cmd
io.mem_req_data <> uncore.io.mem.req_data
io.mem_resp <> uncore.io.mem.resp
}
class FPGATopIO(htifWidth: Int) extends TopIO(htifWidth)
class FPGATop extends Module {
val htif_width = 16
val io = new FPGATopIO(htif_width)
val referenceChip = Module(new Fame1Wrapper(new ReferenceChip(htif_width)))
val dramModel = Module(new DRAMSystemWrapper())
//dram model parameters setup
dramModel.io.params.tRAS := UInt(4)
dramModel.io.params.tRCD := UInt(4)
dramModel.io.params.tRP := UInt(4)
dramModel.io.params.tCCD := UInt(4)
dramModel.io.params.tRTP := UInt(4)
dramModel.io.params.tWTR := UInt(4)
dramModel.io.params.tWR := UInt(4)
dramModel.io.params.tRRD := UInt(4)
//host to reference chip connections
referenceChip.DecoupledIOs("host_in").host_valid := Bool(true)
referenceChip.DecoupledIOs("host_in").target.bits := io.host.in.bits
referenceChip.DecoupledIOs("host_in").target.valid := io.host.in.valid
io.host.in.ready := referenceChip.DecoupledIOs("host_in").host_ready && referenceChip.DecoupledIOs("host_in").target.ready
io.host.out.valid := referenceChip.DecoupledIOs("host_out").host_valid && referenceChip.DecoupledIOs("host_out").target.valid
io.host.out.bits := referenceChip.DecoupledIOs("host_out").target.bits
referenceChip.DecoupledIOs("host_out").target.ready := io.host.out.ready
referenceChip.DecoupledIOs("host_out").host_ready := Bool(true)
io.host.clk := referenceChip.DebugIOs("host_clk")
io.host.clk_edge := referenceChip.DebugIOs("host_clk_edge")
io.host.debug_stats_pcr := referenceChip.DebugIOs("host_debug_stats_pcr")
//reference chip to dram model connections
val mem_req_cmd_queue = Module(new FameQueue(8)(new MemReqCmd()))
val mem_req_data_queue = Module(new FameQueue(8)(new MemData()))
val mem_resp_queue = Module(new FameQueue(8)(new MemResp()))
//cmd queue
FameDecoupledIO.connect(referenceChip.DecoupledIOs("mem_req_cmd"), mem_req_cmd_queue.io.enq, new MemReqCmd)
mem_req_cmd_queue.io.deq <> dramModel.io.memReqCmd
//data queue
FameDecoupledIO.connect(referenceChip.DecoupledIOs("mem_req_data"), mem_req_data_queue.io.enq, new MemData)
mem_req_data_queue.io.deq <> dramModel.io.memReqData
//resp queue
mem_resp_queue.io.enq <> dramModel.io.memResp
FameDecoupledIO.connect(referenceChip.DecoupledIOs("mem_resp"), mem_resp_queue.io.deq, new MemResp)
//dram model to outside memory connections
val host_mem_cmd_queue = Module(new Queue(new MemReqCmd, 2))
val host_mem_data_queue = Module(new Queue(new MemData, REFILL_CYCLES))
val host_mem_resp_queue = Module(new Queue(new MemResp, REFILL_CYCLES))
host_mem_cmd_queue.io.enq <> dramModel.io.mem.req_cmd
host_mem_cmd_queue.io.deq <> io.mem.req_cmd
host_mem_data_queue.io.enq <> dramModel.io.mem.req_data
host_mem_data_queue.io.deq <> io.mem.req_data
host_mem_resp_queue.io.enq <> io.mem.resp
host_mem_resp_queue.io.deq <> dramModel.io.mem.resp
}
abstract class AXISlave extends Module {