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#include "sim.h"
#include "applink.h"
#include "common.h"
#include <sys/mman.h>
#include <map>
#include <iostream>
#include <climits>
#include <assert.h>
sim_t::sim_t(int _nprocs, appserver_link_t* _applink, icsim_t* default_icache, icsim_t* default_dcache)
: applink(_applink),
procs(_nprocs)
{
size_t memsz0 = sizeof(size_t) == 8 ? 0x100000000ULL : 0x70000000UL;
size_t quantum = std::max(PGSIZE, (reg_t)sysconf(_SC_PAGESIZE));
memsz0 = memsz0/quantum*quantum;
memsz = memsz0;
mem = (char*)mmap64(NULL, memsz, PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
if(mem == MAP_FAILED)
{
while(mem == MAP_FAILED && (memsz = memsz*10/11/quantum*quantum))
mem = (char*)mmap64(NULL, memsz, PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
assert(mem != MAP_FAILED);
fprintf(stderr, "warning: only got %lu bytes of target mem (wanted %lu)\n",
(unsigned long)memsz, (unsigned long)memsz0);
}
mmu = new mmu_t(mem, memsz);
for(size_t i = 0; i < num_cores(); i++)
{
procs[i] = new processor_t(this, new mmu_t(mem, memsz));
procs[i]->init(i, default_icache, default_dcache);
}
applink->init(this);
}
sim_t::~sim_t()
{
for(size_t i = 0; i < num_cores(); i++)
{
mmu_t* pmmu = &procs[i]->mmu;
delete procs[i];
delete pmmu;
}
delete mmu;
munmap(mem, memsz);
}
void sim_t::set_tohost(reg_t val)
{
fromhost = 0;
tohost = val;
applink->wait_for_tohost();
}
reg_t sim_t::get_fromhost()
{
applink->wait_for_fromhost();
return fromhost;
}
void sim_t::send_ipi(reg_t who)
{
if(who < num_cores())
procs[who]->deliver_ipi();
}
void sim_t::run(bool debug)
{
applink->wait_for_start();
// start core 0
send_ipi(0);
while(1)
{
if(!debug)
step_all(100,100,false);
else
{
putchar(':');
char s[128];
std::cin.getline(s,sizeof(s)-1);
char* p = strtok(s," ");
if(!p)
{
interactive_run_noisy(std::string("r"), std::vector<std::string>(1,"1"));
continue;
}
std::string cmd = p;
std::vector<std::string> args;
while((p = strtok(NULL," ")))
args.push_back(p);
typedef void (sim_t::*interactive_func)(const std::string&, const std::vector<std::string>&);
std::map<std::string,interactive_func> funcs;
funcs["r"] = &sim_t::interactive_run_noisy;
funcs["rs"] = &sim_t::interactive_run_silent;
funcs["rp"] = &sim_t::interactive_run_proc_noisy;
funcs["rps"] = &sim_t::interactive_run_proc_silent;
funcs["reg"] = &sim_t::interactive_reg;
funcs["fregs"] = &sim_t::interactive_fregs;
funcs["fregd"] = &sim_t::interactive_fregd;
funcs["mem"] = &sim_t::interactive_mem;
funcs["str"] = &sim_t::interactive_str;
funcs["until"] = &sim_t::interactive_until;
funcs["while"] = &sim_t::interactive_until;
funcs["q"] = &sim_t::interactive_quit;
try
{
if(funcs.count(cmd))
(this->*funcs[cmd])(cmd, args);
}
catch(trap_t t) {}
}
}
}
void sim_t::step_all(size_t n, size_t interleave, bool noisy)
{
for(size_t j = 0; j < n; j+=interleave)
for(int i = 0; i < (int)num_cores(); i++)
procs[i]->step(interleave,noisy);
}
void sim_t::interactive_run_noisy(const std::string& cmd, const std::vector<std::string>& args)
{
interactive_run(cmd,args,true);
}
void sim_t::interactive_run_silent(const std::string& cmd, const std::vector<std::string>& args)
{
interactive_run(cmd,args,false);
}
void sim_t::interactive_run(const std::string& cmd, const std::vector<std::string>& args, bool noisy)
{
if(args.size())
step_all(atoll(args[0].c_str()),1,noisy);
else
while(1) step_all(1,1,noisy);
}
void sim_t::interactive_run_proc_noisy(const std::string& cmd, const std::vector<std::string>& args)
{
interactive_run_proc(cmd,args,true);
}
void sim_t::interactive_run_proc_silent(const std::string& cmd, const std::vector<std::string>& args)
{
interactive_run_proc(cmd,args,false);
}
void sim_t::interactive_run_proc(const std::string& cmd, const std::vector<std::string>& a, bool noisy)
{
if(a.size() == 0)
return;
int p = atoi(a[0].c_str());
if(p >= (int)num_cores())
return;
if(a.size() == 2)
procs[p]->step(atoi(a[1].c_str()),noisy);
else
while(1) procs[p]->step(1,noisy);
}
void sim_t::interactive_quit(const std::string& cmd, const std::vector<std::string>& args)
{
throw quit_sim();
}
reg_t sim_t::get_pc(const std::vector<std::string>& args)
{
if(args.size() != 1)
throw trap_illegal_instruction;
int p = atoi(args[0].c_str());
if(p >= (int)num_cores())
throw trap_illegal_instruction;
return procs[p]->pc;
}
reg_t sim_t::get_reg(const std::vector<std::string>& args)
{
if(args.size() != 2)
throw trap_illegal_instruction;
int p = atoi(args[0].c_str());
int r = atoi(args[1].c_str());
if(p >= (int)num_cores() || r >= NXPR)
throw trap_illegal_instruction;
return procs[p]->XPR[r];
}
reg_t sim_t::get_freg(const std::vector<std::string>& args)
{
if(args.size() != 2)
throw trap_illegal_instruction;
int p = atoi(args[0].c_str());
int r = atoi(args[1].c_str());
if(p >= (int)num_cores() || r >= NFPR)
throw trap_illegal_instruction;
return procs[p]->FPR[r];
}
reg_t sim_t::get_tohost(const std::vector<std::string>& args)
{
if(args.size() != 1)
throw trap_illegal_instruction;
int p = atoi(args[0].c_str());
if(p >= (int)num_cores())
throw trap_illegal_instruction;
return procs[p]->tohost;
}
void sim_t::interactive_reg(const std::string& cmd, const std::vector<std::string>& args)
{
printf("0x%016llx\n",(unsigned long long)get_reg(args));
}
union fpr
{
reg_t r;
float s;
double d;
};
void sim_t::interactive_fregs(const std::string& cmd, const std::vector<std::string>& args)
{
fpr f;
f.r = get_freg(args);
printf("%g\n",f.s);
}
void sim_t::interactive_fregd(const std::string& cmd, const std::vector<std::string>& args)
{
fpr f;
f.r = get_freg(args);
printf("%g\n",f.d);
}
reg_t sim_t::get_mem(const std::vector<std::string>& args)
{
if(args.size() != 1 && args.size() != 2)
throw trap_illegal_instruction;
std::string addr_str = args[0];
if(args.size() == 2)
{
int p = atoi(args[0].c_str());
if(p >= (int)num_cores())
throw trap_illegal_instruction;
mmu->set_vm_enabled(!!(procs[p]->sr & SR_VM));
mmu->set_ptbr(procs[p]->mmu.get_ptbr());
addr_str = args[1];
}
reg_t addr = strtol(addr_str.c_str(),NULL,16), val;
if(addr == LONG_MAX)
addr = strtoul(addr_str.c_str(),NULL,16);
switch(addr % 8)
{
case 0:
val = mmu->load_uint64(addr);
break;
case 4:
val = mmu->load_uint32(addr);
break;
case 2:
case 6:
val = mmu->load_uint16(addr);
break;
default:
val = mmu->load_uint8(addr);
break;
}
return val;
}
void sim_t::interactive_mem(const std::string& cmd, const std::vector<std::string>& args)
{
printf("0x%016llx\n",(unsigned long long)get_mem(args));
}
void sim_t::interactive_str(const std::string& cmd, const std::vector<std::string>& args)
{
if(args.size() != 1)
throw trap_illegal_instruction;
reg_t addr = strtol(args[0].c_str(),NULL,16);
char ch;
while((ch = mmu->load_uint8(addr++)))
putchar(ch);
putchar('\n');
}
void sim_t::interactive_until(const std::string& cmd, const std::vector<std::string>& args)
{
if(args.size() < 3)
return;
std::string scmd = args[0];
reg_t val = strtol(args[args.size()-1].c_str(),NULL,16);
if(val == LONG_MAX)
val = strtoul(args[args.size()-1].c_str(),NULL,16);
std::vector<std::string> args2;
args2 = std::vector<std::string>(args.begin()+1,args.end()-1);
while(1)
{
reg_t current;
if(scmd == "reg")
current = get_reg(args2);
else if(scmd == "pc")
current = get_pc(args2);
else if(scmd == "mem")
current = get_mem(args2);
else if(scmd == "tohost")
current = get_tohost(args2);
else
return;
if(cmd == "until" && current == val)
break;
if(cmd == "while" && current != val)
break;
step_all(1,1,false);
}
}
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