#include "sim.h"
#include "mmu.h"
-#include "gdbserver.h"
+#include "remote_bitbang.h"
#include <map>
#include <iostream>
#include <sstream>
sim_t::sim_t(const char* isa, size_t nprocs, bool halted, reg_t start_pc,
std::vector<std::pair<reg_t, mem_t*>> mems,
const std::vector<std::string>& args)
- : htif_t(args), mems(mems), procs(std::max(nprocs, size_t(1))),
+ : htif_t(args), debug_module(this), mems(mems), procs(std::max(nprocs, size_t(1))),
start_pc(start_pc),
- current_step(0), current_proc(0), debug(false), gdbserver(NULL)
+ current_step(0), current_proc(0), debug(false), remote_bitbang(NULL)
{
signal(SIGINT, &handle_signal);
for (auto& x : mems)
bus.add_device(x.first, x.second);
- bus.add_device(DEBUG_START, &debug_module);
+ debug_module.add_device(&bus);
debug_mmu = new mmu_t(this, NULL);
clint.reset(new clint_t(procs));
bus.add_device(CLINT_BASE, clint.get());
-
- make_dtb();
}
sim_t::~sim_t()
interactive();
else
step(INTERLEAVE);
- if (gdbserver) {
- gdbserver->handle();
+ if (remote_bitbang) {
+ remote_bitbang->tick();
}
}
}
{
const int reset_vec_size = 8;
- reg_t pc_delta = start_pc - DEFAULT_RSTVEC;
- reg_t pc_delta_hi = (pc_delta + 0x800U) & ~reg_t(0xfffU);
- reg_t pc_delta_lo = pc_delta - pc_delta_hi;
- if ((pc_delta_hi >> 31) != 0 && (pc_delta_hi >> 31) != reg_t(-1) >> 31) {
- fprintf(stderr, "initial pc %" PRIx64 " out of range\n", pc_delta);
- abort();
- }
+ start_pc = start_pc == reg_t(-1) ? get_entry_point() : start_pc;
uint32_t reset_vec[reset_vec_size] = {
- 0x297 + uint32_t(pc_delta_hi), // auipc t0, &pc
- 0x597, // auipc a1, &dtb
- 0x58593 + ((reset_vec_size - 1) * 4 << 20), // addi a1, a1, &dtb
- 0xf1402573, // csrr a0, mhartid
- 0x28067 + uint32_t(pc_delta_lo << 20) // jalr zero, t0, &pc
+ 0x297, // auipc t0,0x0
+ 0x28593 + (reset_vec_size * 4 << 20), // addi a1, t0, &dtb
+ 0xf1402573, // csrr a0, mhartid
+ get_core(0)->xlen == 32 ?
+ 0x0182a283u : // lw t0,24(t0)
+ 0x0182b283u, // ld t0,24(t0)
+ 0x28067, // jr t0
+ 0,
+ (uint32_t) (start_pc & 0xffffffff),
+ (uint32_t) (start_pc >> 32)
};
std::vector<char> rom((char*)reset_vec, (char*)reset_vec + sizeof(reset_vec));
char* sim_t::addr_to_mem(reg_t addr) {
auto desc = bus.find_device(addr);
- if (auto mem = dynamic_cast<mem_t*>(desc.device))
- return mem->contents() + (addr - desc.base);
+ if (auto mem = dynamic_cast<mem_t*>(desc.second))
+ if (addr - desc.first < mem->size())
+ return mem->contents() + (addr - desc.first);
return NULL;
}
// htif
+void sim_t::reset()
+{
+ make_dtb();
+}
+
void sim_t::idle()
{
target.switch_to();