#include "htif.h"
#include <map>
#include <iostream>
+#include <sstream>
#include <climits>
#include <cstdlib>
#include <cassert>
signal(sig, &handle_signal);
}
-sim_t::sim_t(size_t nprocs, size_t mem_mb, const std::vector<std::string>& args)
+sim_t::sim_t(const char* isa, size_t nprocs, size_t mem_mb,
+ const std::vector<std::string>& args)
: htif(new htif_isasim_t(this, args)), procs(std::max(nprocs, size_t(1))),
current_step(0), current_proc(0), debug(false)
{
size_t memsz0 = (size_t)mem_mb << 20;
size_t quantum = 1L << 20;
if (memsz0 == 0)
- memsz0 = 1L << (sizeof(size_t) == 8 ? 32 : 30);
+ memsz0 = (size_t)((sizeof(size_t) == 8 ? 4096 : 2048) - 256) << 20;
memsz = memsz0;
while ((mem = (char*)calloc(1, memsz)) == NULL)
- memsz = memsz*10/11/quantum*quantum;
+ memsz = (size_t)(memsz*0.9)/quantum*quantum;
- if (memsz != memsz)
+ if (memsz != memsz0)
fprintf(stderr, "warning: only got %lu bytes of target mem (wanted %lu)\n",
(unsigned long)memsz, (unsigned long)memsz0);
debug_mmu = new mmu_t(mem, memsz);
for (size_t i = 0; i < procs.size(); i++)
- procs[i] = new processor_t(this, new mmu_t(mem, memsz), i);
+ procs[i] = new processor_t(isa, this, i);
+
+ rtc.reset(new rtc_t(procs));
+ make_config_string();
}
sim_t::~sim_t()
{
for (size_t i = 0; i < procs.size(); i++)
- {
- mmu_t* pmmu = &procs[i]->mmu;
delete procs[i];
- delete pmmu;
- }
delete debug_mmu;
free(mem);
}
-void sim_t::send_ipi(reg_t who)
-{
- if (who < procs.size())
- procs[who]->deliver_ipi();
-}
-
reg_t sim_t::get_scr(int which)
{
switch (which)
}
}
-void sim_t::run()
+int sim_t::run()
{
- while (!htif->done())
+ if (!debug && log)
+ set_procs_debug(true);
+ while (htif->tick())
{
if (debug || ctrlc_pressed)
interactive();
else
- step(INTERLEAVE, false);
+ step(INTERLEAVE);
}
+ return htif->exit_code();
}
-void sim_t::step(size_t n, bool noisy)
+void sim_t::step(size_t n)
{
for (size_t i = 0, steps = 0; i < n; i += steps)
{
- htif->tick();
- if (!running())
- break;
-
steps = std::min(n - i, INTERLEAVE - current_step);
- procs[current_proc]->step(steps, noisy);
+ procs[current_proc]->step(steps);
current_step += steps;
if (current_step == INTERLEAVE)
{
current_step = 0;
procs[current_proc]->yield_load_reservation();
- if (++current_proc == procs.size())
+ if (++current_proc == procs.size()) {
current_proc = 0;
+ rtc->increment(INTERLEAVE / INSNS_PER_RTC_TICK);
+ }
+
+ htif->tick();
}
}
}
void sim_t::stop()
{
procs[0]->state.tohost = 1;
- while (!htif->done())
- htif->tick();
+ while (htif->tick())
+ ;
+}
+
+void sim_t::set_debug(bool value)
+{
+ debug = value;
+}
+
+void sim_t::set_log(bool value)
+{
+ log = value;
+}
+
+void sim_t::set_histogram(bool value)
+{
+ histogram_enabled = value;
+ for (size_t i = 0; i < procs.size(); i++) {
+ procs[i]->set_histogram(histogram_enabled);
+ }
+}
+
+void sim_t::set_procs_debug(bool value)
+{
+ for (size_t i=0; i< procs.size(); i++)
+ procs[i]->set_debug(value);
+}
+
+bool sim_t::mmio_load(reg_t addr, size_t len, uint8_t* bytes)
+{
+ if (addr + len < addr)
+ return false;
+ return bus.load(addr, len, bytes);
+}
+
+bool sim_t::mmio_store(reg_t addr, size_t len, const uint8_t* bytes)
+{
+ if (addr + len < addr)
+ return false;
+ return bus.store(addr, len, bytes);
+}
+
+void sim_t::make_config_string()
+{
+ size_t csr_size = NCSR * 16 /* RV128 */;
+ size_t device_tree_addr = memsz;
+ size_t cpu_addr = memsz + csr_size;
+
+ reg_t rtc_addr = memsz;
+ bus.add_device(rtc_addr, rtc.get());
+ config_string_addr = rtc_addr + rtc->size();
+
+ std::stringstream s;
+ s << std::hex <<
+ "platform {\n"
+ " vendor ucb;\n"
+ " arch spike;\n"
+ "};\n"
+ "rtc {\n"
+ " addr 0x" << rtc_addr << ";\n"
+ "};\n"
+ "ram {\n"
+ " 0 {\n"
+ " addr 0;\n"
+ " size 0x" << memsz << ";\n"
+ " };\n"
+ "};\n"
+ "core {\n";
+ for (size_t i = 0; i < procs.size(); i++) {
+ s <<
+ " " << i << " {\n"
+ " " << "0 {\n" << // hart 0 on core i
+ " isa " << procs[i]->isa_string << ";\n"
+ " addr 0x" << cpu_addr << ";\n"
+ " timecmp 0x" << (rtc_addr + 8*(1+i)) << ";\n"
+ " };\n"
+ " };\n";
+ bus.add_device(cpu_addr, procs[i]);
+ cpu_addr += csr_size;
+ }
+ s << "};\n";
+
+ std::string str = s.str();
+ std::vector<char> vec(str.begin(), str.end());
+ vec.push_back(0);
+ assert(vec.size() <= csr_size);
+ config_string.reset(new rom_device_t(vec));
+ bus.add_device(config_string_addr, config_string.get());
}