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

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Jaby
2023-04-26 19:09:07 +02:00
parent ed612b00a3
commit c1ff1187f9
10 changed files with 131 additions and 133 deletions
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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