#include "mmu.h"
#include "htif.h"
#include "disasm.h"
+#include "gdbserver.h"
#include <cinttypes>
#include <cmath>
#include <cstdlib>
#undef STATE
#define STATE state
-processor_t::processor_t(const char* isa, sim_t* sim, uint32_t id)
- : sim(sim), ext(NULL), disassembler(new disassembler_t),
- id(id), run(false), debug(false)
+processor_t::processor_t(const char* isa, sim_t* sim, uint32_t id,
+ bool halt_on_reset)
+ : debug(false), sim(sim), ext(NULL), disassembler(new disassembler_t),
+ id(id), run(false), halt_on_reset(halt_on_reset)
{
parse_isa_string(isa);
load_reservation = -1;
}
-void processor_t::set_debug_int()
-{
- state.dcsr.debugint = true;
-}
-
void processor_t::set_debug(bool value)
{
debug = value;
run = !value;
state.reset();
+ state.dcsr.halt = halt_on_reset;
+ halt_on_reset = false;
set_csr(CSR_MSTATUS, state.mstatus);
if (ext)
void processor_t::enter_debug_mode(uint8_t cause)
{
- fprintf(stderr, "enter_debug_mode(%d)\n", cause);
+ fprintf(stderr, "enter_debug_mode(%d), mstatus=0x%lx, prv=0x%lx\n", cause, state.mstatus, state.prv);
state.dcsr.cause = cause;
state.dcsr.prv = state.prv;
- state.prv = PRV_M;
+ set_privilege(PRV_M);
state.dpc = state.pc;
state.pc = DEBUG_ROM_START;
debug = true; // TODO
void processor_t::take_trap(trap_t& t, reg_t epc)
{
- if (debug)
+ if (debug) {
fprintf(stderr, "core %3d: exception %s, epc 0x%016" PRIx64 "\n",
id, t.name(), epc);
+ if (t.has_badaddr())
+ fprintf(stderr, "core %3d: badaddr 0x%016" PRIx64 "\n", id,
+ t.get_badaddr());
+ }
- if (t.cause() == CAUSE_BREAKPOINT &&
- sim->gdbserver && sim->gdbserver->connected()) {
+ if (t.cause() == CAUSE_BREAKPOINT && (
+ (state.prv == PRV_M && state.dcsr.ebreakm) ||
+ (state.prv == PRV_H && state.dcsr.ebreakh) ||
+ (state.prv == PRV_S && state.dcsr.ebreaks) ||
+ (state.prv == PRV_U && state.dcsr.ebreaku))) {
enter_debug_mode(DCSR_CAUSE_SWBP);
return;
}
+ if (state.dcsr.cause) {
+ state.pc = DEBUG_ROM_EXCEPTION;
+ return;
+ }
+
// by default, trap to M-mode, unless delegated to S-mode
reg_t bit = t.cause();
reg_t deleg = state.medeleg;
set_privilege(PRV_S);
} else {
state.pc = state.mtvec;
- state.mcause = t.cause();
state.mepc = epc;
+ state.mcause = t.cause();
if (t.has_badaddr())
state.mbadaddr = t.get_badaddr();
case CSR_MSCRATCH: state.mscratch = val; break;
case CSR_MCAUSE: state.mcause = val; break;
case CSR_MBADADDR: state.mbadaddr = val; break;
- case DCSR_ADDRESS:
- // TODO: Use get_field style
- state.dcsr.prv = (val & DCSR_PRV_MASK) >> DCSR_PRV_OFFSET;
- state.dcsr.step = (val & DCSR_STEP_MASK) >> DCSR_STEP_OFFSET;
+ case CSR_DCSR:
+ state.dcsr.prv = get_field(val, DCSR_PRV);
+ state.dcsr.step = get_field(val, DCSR_STEP);
// TODO: ndreset and fullreset
- state.dcsr.ebreakm = (val & DCSR_EBREAKM_MASK) >> DCSR_EBREAKM_OFFSET;
- state.dcsr.ebreakh = (val & DCSR_EBREAKH_MASK) >> DCSR_EBREAKH_OFFSET;
- state.dcsr.ebreaks = (val & DCSR_EBREAKS_MASK) >> DCSR_EBREAKS_OFFSET;
- state.dcsr.ebreaku = (val & DCSR_EBREAKU_MASK) >> DCSR_EBREAKU_OFFSET;
- state.dcsr.halt = (val & DCSR_HALT_MASK) >> DCSR_HALT_OFFSET;
+ state.dcsr.ebreakm = get_field(val, DCSR_EBREAKM);
+ state.dcsr.ebreakh = get_field(val, DCSR_EBREAKH);
+ state.dcsr.ebreaks = get_field(val, DCSR_EBREAKS);
+ state.dcsr.ebreaku = get_field(val, DCSR_EBREAKU);
+ state.dcsr.halt = get_field(val, DCSR_HALT);
break;
- case DPC_ADDRESS:
+ case CSR_DPC:
state.dpc = val;
break;
- case DSCRATCH_ADDRESS:
+ case CSR_DSCRATCH:
state.dscratch = val;
break;
}
case CSR_MTVEC: return state.mtvec;
case CSR_MEDELEG: return state.medeleg;
case CSR_MIDELEG: return state.mideleg;
- case DCSR_ADDRESS:
- return
- (1 << DCSR_XDEBUGVER_OFFSET) |
- (0 << DCSR_HWBPCOUNT_OFFSET) |
- (0 << DCSR_NDRESET_OFFSET) |
- (0 << DCSR_FULLRESET_OFFSET) |
- (state.dcsr.prv << DCSR_PRV_OFFSET) |
- (state.dcsr.step << DCSR_STEP_OFFSET) |
- (state.dcsr.debugint << DCSR_DEBUGINT_OFFSET) |
- (0 << DCSR_STOPCYCLE_OFFSET) |
- (0 << DCSR_STOPTIME_OFFSET) |
- (state.dcsr.ebreakm << DCSR_EBREAKM_OFFSET) |
- (state.dcsr.ebreakh << DCSR_EBREAKH_OFFSET) |
- (state.dcsr.ebreaks << DCSR_EBREAKS_OFFSET) |
- (state.dcsr.ebreaku << DCSR_EBREAKU_OFFSET) |
- (state.dcsr.halt << DCSR_HALT_OFFSET) |
- (state.dcsr.cause << DCSR_CAUSE_OFFSET);
- case DPC_ADDRESS:
+ case CSR_DCSR:
+ {
+ uint32_t v = 0;
+ v = set_field(v, DCSR_XDEBUGVER, 1);
+ v = set_field(v, DCSR_HWBPCOUNT, 0);
+ v = set_field(v, DCSR_NDRESET, 0);
+ v = set_field(v, DCSR_FULLRESET, 0);
+ v = set_field(v, DCSR_PRV, state.dcsr.prv);
+ v = set_field(v, DCSR_STEP, state.dcsr.step);
+ v = set_field(v, DCSR_DEBUGINT, sim->debug_module.get_interrupt(id));
+ v = set_field(v, DCSR_STOPCYCLE, 0);
+ v = set_field(v, DCSR_STOPTIME, 0);
+ v = set_field(v, DCSR_EBREAKM, state.dcsr.ebreakm);
+ v = set_field(v, DCSR_EBREAKH, state.dcsr.ebreakh);
+ v = set_field(v, DCSR_EBREAKS, state.dcsr.ebreaks);
+ v = set_field(v, DCSR_EBREAKU, state.dcsr.ebreaku);
+ v = set_field(v, DCSR_HALT, state.dcsr.halt);
+ v = set_field(v, DCSR_CAUSE, state.dcsr.cause);
+ return v;
+ }
+ case CSR_DPC:
return state.dpc;
- case DSCRATCH_ADDRESS:
+ case CSR_DSCRATCH:
return state.dscratch;
}
throw trap_illegal_instruction();