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Add busy loop code and make HighResTimer work on demand rather automatically or ifdefed

This commit is contained in:
jaby 2023-04-26 19:09:07 +02:00
parent a1ca69094e
commit 9dc25e469c
10 changed files with 131 additions and 133 deletions
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87
include/PSX/Timer/high_res_timer.hpp
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@ -1,6 +1,7 @@
#ifndef __JABYENGINE_HIGH_RES_TIMER_HPP__
#define __JABYENGINE_HIGH_RES_TIMER_HPP__
#include "../jabyengine_defines.h"
#include <PSX/System/IOPorts/interrupt_io.hpp>
#include <PSX/System/IOPorts/timer_io.hpp>
namespace JabyEngine {
@ -24,51 +25,57 @@ namespace JabyEngine {
}
};
#ifdef JABYENGINE_USE_HIGH_PERCISION_TIMER
class HighResTime {
public:
class TimeStamp {
private:
uint16_t counter_10ms_value;
uint16_t fraction;
constexpr TimeStamp(uint16_t counter_10ms_value, uint16_t fraction) : counter_10ms_value(counter_10ms_value), fraction(fraction) {
}
constexpr static size_t to_us(uint16_t counter_10ms_value, uint16_t fraction) {
return counter_10ms_value*(10*1000) + ((fraction/HighResTime::TicksFor100us)*100);
}
constexpr static size_t to_ms(uint16_t counter_10ms_value, uint16_t fraction) {
return counter_10ms_value*10 + (fraction/HighResTime::TicksFor1ms);
}
public:
constexpr size_t microseconds_to(const TimeStamp& end) const {
return TimeStamp::to_us((end.counter_10ms_value - this->counter_10ms_value), (end.fraction - this->fraction));
}
constexpr size_t milliseconds_to(const TimeStamp& end) const {
return TimeStamp::to_ms((end.counter_10ms_value - this->counter_10ms_value), (end.fraction - this->fraction));
}
friend class HighResTime;
};
class HighResTime {
public:
class TimeStamp {
private:
static constexpr uint16_t TicksFor100us = CPUTicks::ticks_per_us<uint16_t>(CPUTicks::Frequency_Hz_Div8, 100.0);
static constexpr uint16_t TicksFor1ms = CPUTicks::ticks_per_ms<uint16_t>(CPUTicks::Frequency_Hz_Div8, 1.0);
static constexpr uint16_t TicksFor10ms = CPUTicks::ticks_per_ms<uint16_t>(CPUTicks::Frequency_Hz_Div8, 10.0);
uint16_t counter_10ms_value;
uint16_t fraction;
static volatile uint16_t global_counter_10ms;
constexpr TimeStamp(uint16_t counter_10ms_value, uint16_t fraction) : counter_10ms_value(counter_10ms_value), fraction(fraction) {
}
constexpr static size_t to_us(uint16_t counter_10ms_value, uint16_t fraction) {
return counter_10ms_value*(10*1000) + ((fraction/HighResTime::TicksFor100us)*100);
}
constexpr static size_t to_ms(uint16_t counter_10ms_value, uint16_t fraction) {
return counter_10ms_value*10 + (fraction/HighResTime::TicksFor1ms);
}
public:
HighResTime() = delete;
~HighResTime() = delete;
static TimeStamp get_time_stamp() {
return TimeStamp(HighResTime::global_counter_10ms, Timer_IO::Counter2.get_current_value());
constexpr size_t microseconds_to(const TimeStamp& end) const {
return TimeStamp::to_us((end.counter_10ms_value - this->counter_10ms_value), (end.fraction - this->fraction));
}
constexpr size_t milliseconds_to(const TimeStamp& end) const {
return TimeStamp::to_ms((end.counter_10ms_value - this->counter_10ms_value), (end.fraction - this->fraction));
}
friend class HighResTime;
};
#endif //JABYENGINE_USE_HIGH_PERCISION_TIMER
private:
static constexpr uint16_t TicksFor100us = CPUTicks::ticks_per_us<uint16_t>(CPUTicks::Frequency_Hz_Div8, 100.0);
static constexpr uint16_t TicksFor1ms = CPUTicks::ticks_per_ms<uint16_t>(CPUTicks::Frequency_Hz_Div8, 1.0);
static constexpr uint16_t TicksFor10ms = CPUTicks::ticks_per_ms<uint16_t>(CPUTicks::Frequency_Hz_Div8, 10.0);
static volatile uint16_t global_counter_10ms;
public:
HighResTime() = delete;
~HighResTime() = delete;
static void enable() {
Interrupt::enable_irq(Interrupt::Timer2);
}
static void disable() {
Interrupt::disable_irq(Interrupt::Timer2);
}
static TimeStamp get_time_stamp() {
return TimeStamp(HighResTime::global_counter_10ms, Timer_IO::Counter2.get_current_value());
}
};
}
#endif //!__JABYENGINE_HIGH_RES_TIMER_HPP__

8
include/PSX/jabyengine_config.hpp
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@ -1,8 +0,0 @@
#ifndef __JABYENGINE_CONFIG_HPP__
#define __JABYENGINE_CONFIG_HPP__
#ifdef USE_CUSTOM_CONFIG
#include <jabyengine_custom_config.hpp>
#else
#define JABYENGINE_USE_HIGH_PERCISION_TIMER
#endif //USE_CUSTOM_CONFIG
#endif //!__JABYENGINE_CONFIG_HPP__

1
include/PSX/jabyengine_defines.h
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@ -1,6 +1,5 @@
#ifndef __JABYENGINE_DEFINES__H__
#define __JABYENGINE_DEFINES__H__
#include "jabyengine_config.hpp"
#include "../stddef.h"
#define __used __attribute__((used))

10
lib/Makefile
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@ -46,11 +46,7 @@ CCFLAGS_debug += -O0
CXXFLAGS += -fno-exceptions -fno-rtti
USE_FUNCTION_SECTIONS ?= true
ifeq ($(USE_FUNCTION_SECTIONS),true)
CCFLAGS += -ffunction-sections
endif
CCFLAGS += -mno-gpopt -fomit-frame-pointer
CCFLAGS += -mno-gpopt -fomit-frame-pointer -ffunction-sections
CCFLAGS += -fno-builtin -fno-strict-aliasing -Wno-attributes
CCFLAGS += -std=c++20
CCFLAGS += $(ARCHFLAGS)
@ -76,11 +72,11 @@ OBJS = $(addprefix $(OUTPUT_DIR)/,$(addsuffix .o, $(subst ..,!super,$(basename $
#Compiling rule
$(OUTPUT_DIR)/%.o: %.s
@mkdir -p $(dir $@)
$(CC) -c $(DEPS) -o $@ $(CCFLAGS) $(CCFLAGS) $<
$(CC) -c $(DEPS) -o $@ $(CCFLAGS) $<
$(OUTPUT_DIR)/%.o: %.c
@mkdir -p $(dir $@)
$(CC) -c $(DEPS) -o $@ $(CCFLAGS) $(CCFLAGS) $<
$(CC) -c $(DEPS) -o $@ $(CCFLAGS) $<
$(OUTPUT_DIR)/%.o: %.cpp
@mkdir -p $(dir $@)

3
src/Library/Makefile
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@ -10,8 +10,7 @@ CCFLAGS += -Iinclude -I../../include
CCFLAGS += -save-temps=obj
include ../../lib/Wildcard.mk
SRCS = $(call rwildcard, src, c cpp)
SRCS += src/syscall_printf.asm
SRCS = $(call rwildcard, src, c cpp s)
include ../../lib/Makefile
LIB_DIR = ../../lib/$(CONFIG_NAME)

5
src/Library/src/BootLoader/start_boot.cpp
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@ -21,15 +21,10 @@ namespace JabyEngine {
CD::setup();
Timer::setup();
const auto start = HighResTime::get_time_stamp();
printf("Start...\n");
GPU::setup();
GPU::display_logo();
const auto end = HighResTime::get_time_stamp();
printf("GPU setup took %ims %ius\n", start.milliseconds_to(end), start.microseconds_to(end));
//Pause??
SPU::setup();
}
}

62
src/Library/src/BootLoader/timer_boot.cpp
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@ -1,46 +1,34 @@
#include <PSX/jabyengine_config.hpp>
#ifdef JABYENGINE_USE_HIGH_PERCISION_TIMER
#include <PSX/System/IOPorts/interrupt_io.hpp>
#include <PSX/System/syscalls.h>
#define private public
#include <PSX/Timer/high_res_timer.hpp>
#undef private
#include <PSX/System/IOPorts/interrupt_io.hpp>
#include <PSX/System/syscalls.h>
#define private public
#include <PSX/Timer/high_res_timer.hpp>
#undef private
namespace JabyEngine {
namespace JabyEngine {
namespace Timer {
extern InterrupCallback IRQCallback;
}
namespace boot {
namespace Timer {
extern InterrupCallback IRQCallback;
}
using namespace JabyEngine::Timer;
void setup() {
using namespace Timer_IO;
namespace boot {
namespace Timer {
using namespace JabyEngine::Timer;
void setup() {
using namespace Timer_IO;
static constexpr auto Mode = CounterMode_t::from(CounterMode_t::FreeRun, Counter2_v::SyncMode::FreeRun, CounterMode_t::ResetAfterTarget, CounterMode_t::IRQAtTarget, CounterMode_t::IRQEveryTime, CounterMode_t::IRQPulse, Counter2_v::Source::System_Clock_Div_8);
static constexpr auto Mode = CounterMode_t::from(CounterMode_t::FreeRun, Counter2_v::SyncMode::FreeRun, CounterMode_t::ResetAfterTarget, CounterMode_t::IRQAtTarget, CounterMode_t::IRQEveryTime, CounterMode_t::IRQPulse, Counter2_v::Source::System_Clock_Div_8);
// We disable the IRQ here so it can be enabled by user demand later
// Having the interrupt fire every 10ms will slow us down slightly so we only do it on demand
Interrupt::disable_irq(Interrupt::Timer2);
Interrupt::disable_irq(Interrupt::Timer2);
__syscall_EnterCriticalSection();
__syscall_SysEnqIntRP(Timer2Irq, &IRQCallback);
__syscall_ExitCriticalSection();
__syscall_EnterCriticalSection();
__syscall_SysEnqIntRP(Timer2Irq, &IRQCallback);
__syscall_ExitCriticalSection();
Counter2.set_target_value(HighResTime::TicksFor10ms);
Counter2.set_mode(Mode);
Interrupt::enable_irq(Interrupt::Timer2);
}
Counter2.set_target_value(HighResTime::TicksFor10ms);
Counter2.set_mode(Mode);
}
}
}
#else
namespace JabyEngine {
namespace boot {
namespace Timer {
void setup() {
}
}
}
}
#endif //JABYENGINE_USE_HIGH_PERCISION_TIMER
}

60
src/Library/src/Timer/high_res_timer.cpp
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@ -1,38 +1,34 @@
#include <PSX/jabyengine_config.hpp>
#ifdef JABYENGINE_USE_HIGH_PERCISION_TIMER
#define private public
#include <PSX/System/IOPorts/interrupt_io.hpp>
#include <PSX/System/IOPorts/timer_io.hpp>
#include <PSX/System/syscalls.h>
#include <PSX/Timer/high_res_timer.hpp>
#undef private
#define private public
#include <PSX/System/IOPorts/timer_io.hpp>
#include <PSX/System/syscalls.h>
#include <PSX/Timer/high_res_timer.hpp>
#undef private
namespace JabyEngine {
volatile uint16_t HighResTime :: global_counter_10ms = 0;
namespace JabyEngine {
volatile uint16_t HighResTime :: global_counter_10ms = 0;
namespace Timer {
static InterruptVerifierResult interrupt_verifier() {
if(Interrupt::is_irq(Interrupt::Timer2)) {
return InterruptVerifierResult::ExecuteHandler;
}
else {
return InterruptVerifierResult::SkipHandler;
}
namespace Timer {
static InterruptVerifierResult interrupt_verifier() {
if(Interrupt::is_irq(Interrupt::Timer2)) {
return InterruptVerifierResult::ExecuteHandler;
}
static void interrupt_handler(uint32_t) {
HighResTime::global_counter_10ms = HighResTime::global_counter_10ms + 1;
Interrupt::ack_irq(Interrupt::Timer2);
__syscall_ReturnFromException();
else {
return InterruptVerifierResult::SkipHandler;
}
InterrupCallback IRQCallback = {
.next = nullptr,
.handler_function = reinterpret_cast<InterruptHandler>(interrupt_handler),
.verifier_function = interrupt_verifier
};
}
static void interrupt_handler(uint32_t) {
HighResTime::global_counter_10ms = HighResTime::global_counter_10ms + 1;
Interrupt::ack_irq(Interrupt::Timer2);
__syscall_ReturnFromException();
}
InterrupCallback IRQCallback = {
.next = nullptr,
.handler_function = reinterpret_cast<InterruptHandler>(interrupt_handler),
.verifier_function = interrupt_verifier
};
}
#endif //JABYENGINE_USE_HIGH_PERCISION_TIMER
}

26
src/Library/src/busyloop.s Normal file
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@ -0,0 +1,26 @@
.set noreorder
.section .text, "ax", @progbits
.align 2
.global busy_loop
.type busy_loop, @function
busy_loop:
sw $a0, 0($sp)
lw $v0, 0($sp)
lw $v1, 0($sp)
nop
addiu $v1, -1
beqz $v0, early_exit
sw $v1, 0($sp)
busy_loop_loop:
lw $v0, 0($sp)
lw $v1, 0($sp)
nop
addiu $v1, -1
bnez $v0, busy_loop_loop
sw $v1, 0($sp)
early_exit:
jr $ra
nop

2
src/Library/src/syscall_printf.s
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@ -1,6 +1,6 @@
.set push
.set noreorder
#.section .ramtext, "ax", @progbits
.section .text, "ax", @progbits
.align 2
.global __syscall_printf
.type __syscall_printf, @function