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Give the counter frequency

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This commit is contained in:
Baptiste Wicht 2016-08-10 19:48:15 +02:00
parent e5b11d3a45
commit b9f54bbd3d
1 changed files with 6 additions and 3 deletions
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9
kernel/src/drivers/pit.cpp
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@ -15,6 +15,8 @@
namespace { namespace {
constexpr const uint64_t PIT_FREQUENCY = 1000;
size_t pit_counter = 0; size_t pit_counter = 0;
void timer_handler(interrupt::syscall_regs*, void*){ void timer_handler(interrupt::syscall_regs*, void*){
@ -26,14 +28,14 @@ void timer_handler(interrupt::syscall_regs*, void*){
} //End of anonymous namespace } //End of anonymous namespace
bool pit::install(){ bool pit::install(){
uint64_t divisor = 1193180 / 1000; uint64_t divisor = 1193180 / PIT_FREQUENCY;
out_byte(0x43, 0x36); out_byte(0x43, 0x36);
out_byte(0x40, static_cast<uint8_t>(divisor)); out_byte(0x40, static_cast<uint8_t>(divisor));
out_byte(0x40, static_cast<uint8_t>(divisor >> 8)); out_byte(0x40, static_cast<uint8_t>(divisor >> 8));
// Indicate the timer frequency // Indicate the timer frequency
timer::timer_frequency(1000); timer::timer_frequency(PIT_FREQUENCY);
if(!interrupt::register_irq_handler(0, timer_handler, nullptr)){ if(!interrupt::register_irq_handler(0, timer_handler, nullptr)){
logging::logf(logging::log_level::ERROR, "Unable to register PIT IRQ handler 0\n"); logging::logf(logging::log_level::ERROR, "Unable to register PIT IRQ handler 0\n");
@ -41,8 +43,9 @@ bool pit::install(){
return false; return false;
} }
// Let the timer know how to query the counter // Let the timer know about the counter
timer::counter_fun(pit::counter); timer::counter_fun(pit::counter);
timer::counter_frequency(PIT_FREQUENCY);
logging::logf(logging::log_level::TRACE, "PIT Driver Installed\n"); logging::logf(logging::log_level::TRACE, "PIT Driver Installed\n");