// See LICENSE for license details.
#include "sim.h"
-#include "htif.h"
-#include "devicetree.h"
+#include "mmu.h"
+#include "gdbserver.h"
#include <map>
#include <iostream>
+#include <sstream>
#include <climits>
#include <cstdlib>
#include <cassert>
signal(sig, &handle_signal);
}
-sim_t::sim_t(const char* isa, size_t nprocs, size_t mem_mb,
+sim_t::sim_t(const char* isa, size_t nprocs, size_t mem_mb, bool halted,
const std::vector<std::string>& args)
- : htif(new htif_isasim_t(this, args)), procs(std::max(nprocs, size_t(1))),
- rtc(0), current_step(0), current_proc(0), debug(false)
+ : htif_t(args), procs(std::max(nprocs, size_t(1))),
+ current_step(0), current_proc(0), debug(false), gdbserver(NULL)
{
signal(SIGINT, &handle_signal);
// allocate target machine's memory, shrinking it as necessary
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);
+ bus.add_device(DEBUG_START, &debug_module);
- for (size_t i = 0; i < procs.size(); i++)
- procs[i] = new processor_t(isa, this, i);
+ debug_mmu = new mmu_t(this, NULL);
- make_device_tree();
+ for (size_t i = 0; i < procs.size(); i++) {
+ procs[i] = new processor_t(isa, this, i, halted);
+ }
+
+ rtc.reset(new rtc_t(procs));
+ make_config_string();
}
sim_t::~sim_t()
free(mem);
}
-reg_t sim_t::get_scr(int which)
+void sim_thread_main(void* arg)
{
- switch (which)
- {
- case 0: return procs.size();
- case 1: return memsz >> 20;
- default: return -1;
- }
+ ((sim_t*)arg)->main();
}
-int sim_t::run()
+void sim_t::main()
{
if (!debug && log)
set_procs_debug(true);
- while (htif->tick())
+
+ while (!done())
{
if (debug || ctrlc_pressed)
interactive();
else
step(INTERLEAVE);
+ if (gdbserver) {
+ gdbserver->handle();
+ }
}
- return htif->exit_code();
+}
+
+int sim_t::run()
+{
+ host = context_t::current();
+ target.init(sim_thread_main, this);
+ return htif_t::run();
}
void sim_t::step(size_t n)
procs[current_proc]->yield_load_reservation();
if (++current_proc == procs.size()) {
current_proc = 0;
- rtc += INTERLEAVE / INSNS_PER_RTC_TICK;
+ rtc->increment(INTERLEAVE / INSNS_PER_RTC_TICK);
}
- htif->tick();
+ host->switch_to();
}
}
}
-bool sim_t::running()
-{
- for (size_t i = 0; i < procs.size(); i++)
- if (procs[i]->running())
- return true;
- return false;
-}
-
-void sim_t::stop()
-{
- procs[0]->state.tohost = 1;
- while (htif->tick())
- ;
-}
-
void sim_t::set_debug(bool value)
{
debug = value;
return bus.store(addr, len, bytes);
}
-void sim_t::make_device_tree()
-{
- char buf[32];
- size_t max_devtree_size = procs.size() * 4096; // sloppy upper bound
- size_t cpu_size = NCSR * procs[0]->max_xlen / 8;
- reg_t cpu_addr = memsz + max_devtree_size;
-
- device_tree dt;
- dt.begin_node("");
- dt.add_prop("#address-cells", 2);
- dt.add_prop("#size-cells", 2);
- dt.add_prop("model", "Spike");
- dt.begin_node("memory@0");
- dt.add_prop("device_type", "memory");
- dt.add_reg({0, memsz});
- dt.end_node();
- dt.begin_node("cpus");
- dt.add_prop("#address-cells", 2);
- dt.add_prop("#size-cells", 2);
- for (size_t i = 0; i < procs.size(); i++) {
- sprintf(buf, "cpu@%" PRIx64, cpu_addr);
- dt.begin_node(buf);
- dt.add_prop("device_type", "cpu");
- dt.add_prop("compatible", "riscv");
- dt.add_prop("isa", procs[i]->isa_string);
- dt.add_reg({cpu_addr});
- dt.end_node();
-
- bus.add_device(cpu_addr, procs[i]);
- cpu_addr += cpu_size;
- }
- dt.end_node();
- dt.end_node();
+void sim_t::make_config_string()
+{
+ reg_t rtc_addr = EXT_IO_BASE;
+ bus.add_device(rtc_addr, rtc.get());
+
+ const int align = 0x1000;
+ reg_t cpu_addr = rtc_addr + ((rtc->size() - 1) / align + 1) * align;
+ reg_t cpu_size = align;
+
+ uint32_t reset_vec[8] = {
+ 0x297 + DRAM_BASE - DEFAULT_RSTVEC, // reset vector
+ 0x00028067, // jump straight to DRAM_BASE
+ 0x00000000, // reserved
+ 0, // config string pointer
+ 0, 0, 0, 0 // trap vector
+ };
+ reset_vec[3] = DEFAULT_RSTVEC + sizeof(reset_vec); // config string pointer
+
+ std::vector<char> rom((char*)reset_vec, (char*)reset_vec + sizeof(reset_vec));
+
+ 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 0x" << DRAM_BASE << ";\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"
+ " timecmp 0x" << (rtc_addr + 8*(1+i)) << ";\n"
+ " ipi 0x" << cpu_addr << ";\n"
+ " };\n"
+ " };\n";
+ bus.add_device(cpu_addr, procs[i]);
+ cpu_addr += cpu_size;
+ }
+ s << "};\n";
+
+ config_string = s.str();
+ rom.insert(rom.end(), config_string.begin(), config_string.end());
+ rom.resize((rom.size() / align + 1) * align);
+
+ boot_rom.reset(new rom_device_t(rom));
+ bus.add_device(DEFAULT_RSTVEC, boot_rom.get());
+}
- devicetree.reset(new rom_device_t(dt.finalize()));
- bus.add_device(memsz, devicetree.get());
+// htif
+
+void sim_t::idle()
+{
+ target.switch_to();
+}
+
+void sim_t::read_chunk(addr_t taddr, size_t len, void* dst)
+{
+ assert(len == 8);
+ auto data = debug_mmu->load_uint64(taddr);
+ memcpy(dst, &data, sizeof data);
+}
+
+void sim_t::write_chunk(addr_t taddr, size_t len, const void* src)
+{
+ assert(len == 8);
+ uint64_t data;
+ memcpy(&data, src, sizeof data);
+ debug_mmu->store_uint64(taddr, data);
}
projects / riscv-isa-sim.git / blobdiff