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TRAP delay

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folkert van heusden 2024-04-20 09:38:19 +02:00
parent 4352d5fd0d
commit 729013bfd8
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 25 additions and 1 deletions
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22
cpu.cpp
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@ -329,6 +329,9 @@ void cpu::setPSW_flags_nzv(const uint16_t value, const word_mode_t word_mode)
bool cpu::check_pending_interrupts() const
{
if (trap_delay.has_value() && trap_delay.value() > 1)
return false;
uint8_t start_level = getPSW_spl() + 1;
for(uint8_t i=start_level; i < 8; i++) {
@ -349,6 +352,19 @@ bool cpu::execute_any_pending_interrupt()
std::unique_lock<std::mutex> lck(qi_lock);
#endif
bool can_trigger = false;
if (trap_delay.has_value()) {
trap_delay.value()--;
if (trap_delay.value() > 0)
return false;
trap_delay.reset();
can_trigger = true;
}
any_queued_interrupts = false;
uint8_t current_level = getPSW_spl();
@ -366,6 +382,11 @@ bool cpu::execute_any_pending_interrupt()
if (i < start_level)
continue;
if (can_trigger == false) {
trap_delay = initial_trap_delay;
return false;
}
auto vector = interrupts->second.begin();
uint8_t v = *vector;
@ -1797,6 +1818,7 @@ void cpu::trap(uint16_t vector, const int new_ipl, const bool is_interrupt)
// if we reach this point then the trap was processed without causing
// another trap
DOLOG(debug, false, "Trapping to %06o with PSW %06o", pc, psw);
}
catch(const int exception) {
DOLOG(debug, false, "trap during execution of trap (%d)", exception);

4
cpu.h
View file

@ -16,6 +16,8 @@
#include "bus.h"
constexpr const int initial_trap_delay = 8;
constexpr const int max_stacktrace_depth = 16;
typedef struct {
@ -53,7 +55,7 @@ private:
uint64_t running_since { 0 };
uint64_t wait_time { 0 };
bool it_is_a_trap { false };
std::optional<int> trap_delay { 0 };
bool debug_mode { false };
std::vector<std::pair<uint16_t, std::string> > stacktrace;