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Kernel: Move x86-specific timer code handling to Arch/x86/Time directory

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The APICTimer, HPET and RTC (the RTC timer is in the context of the PC
RTC here) are timers that exist only in x86 platforms, therefore, we
move the handling code and the initialization code to the Arch/x86/Time
directory. Other related code patterns in the TimeManagement singleton
and in the Random.cpp file are guarded with #ifdef to ensure they are
only compiled for x86 builds.
This commit is contained in:
Liav A
2022-09-23 11:41:59 +03:00
committed by Linus Groh
parent 48f3d762af
commit fe2bd8e3dd
Notes: sideshowbarker 2024-07-17 06:41:55 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/fe2bd8e3dd
Pull-request: https://github.com/SerenityOS/serenity/pull/15107
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/FireFox317
Reviewed-by: https://github.com/kleinesfilmroellchen
Reviewed-by: https://github.com/linusg
16 changed files with 51 additions and 33 deletions
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36
Kernel/Time/TimeManagement.cpp
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@@ -7,20 +7,22 @@
#include <AK/Singleton.h>
#include <AK/StdLibExtras.h>
#include <AK/Time.h>
#include <Kernel/Arch/InterruptDisabler.h>
#include <Kernel/Arch/x86/common/Interrupts/APIC.h>
#include <Kernel/Arch/x86/common/RTC.h>
#if ARCH(I386) || ARCH(X86_64)
# include <Kernel/Arch/InterruptDisabler.h>
# include <Kernel/Arch/x86/Time/APICTimer.h>
# include <Kernel/Arch/x86/Time/HPET.h>
# include <Kernel/Arch/x86/Time/HPETComparator.h>
# include <Kernel/Arch/x86/Time/PIT.h>
# include <Kernel/Arch/x86/Time/RTC.h>
# include <Kernel/Arch/x86/common/Interrupts/APIC.h>
# include <Kernel/Arch/x86/common/RTC.h>
#endif
#include <Kernel/CommandLine.h>
#include <Kernel/Firmware/ACPI/Parser.h>
#include <Kernel/PerformanceManager.h>
#include <Kernel/Scheduler.h>
#include <Kernel/Sections.h>
#include <Kernel/Time/APICTimer.h>
#include <Kernel/Time/HPET.h>
#include <Kernel/Time/HPETComparator.h>
#include <Kernel/Time/HardwareTimer.h>
#include <Kernel/Time/PIT.h>
#include <Kernel/Time/RTC.h>
#include <Kernel/Time/TimeManagement.h>
#include <Kernel/TimerQueue.h>
@@ -137,8 +139,9 @@ u64 TimeManagement::uptime_ms() const
return ms;
}
UNMAP_AFTER_INIT void TimeManagement::initialize(u32 cpu)
UNMAP_AFTER_INIT void TimeManagement::initialize([[maybe_unused]] u32 cpu)
{
#if ARCH(I386) || ARCH(X86_64)
if (cpu == 0) {
VERIFY(!s_the.is_initialized());
s_the.ensure_instance();
@@ -160,6 +163,7 @@ UNMAP_AFTER_INIT void TimeManagement::initialize(u32 cpu)
apic_timer->enable_local_timer();
}
}
#endif
}
void TimeManagement::set_system_timer(HardwareTimerBase& timer)
@@ -184,6 +188,7 @@ time_t TimeManagement::boot_time()
UNMAP_AFTER_INIT TimeManagement::TimeManagement()
: m_time_page_region(MM.allocate_kernel_region(PAGE_SIZE, "Time page"sv, Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow).release_value_but_fixme_should_propagate_errors())
{
#if ARCH(I386) || ARCH(X86_64)
bool probe_non_legacy_hardware_timers = !(kernel_command_line().is_legacy_time_enabled());
if (ACPI::is_enabled()) {
if (!ACPI::Parser::the()->x86_specific_flags().cmos_rtc_not_present) {
@@ -198,12 +203,13 @@ UNMAP_AFTER_INIT TimeManagement::TimeManagement()
m_epoch_time.tv_sec += boot_time();
}
if (probe_non_legacy_hardware_timers) {
if (!probe_and_set_non_legacy_hardware_timers())
if (!probe_and_set_legacy_hardware_timers())
if (!probe_and_set_x86_non_legacy_hardware_timers())
if (!probe_and_set_x86_legacy_hardware_timers())
VERIFY_NOT_REACHED();
} else if (!probe_and_set_legacy_hardware_timers()) {
} else if (!probe_and_set_x86_legacy_hardware_timers()) {
VERIFY_NOT_REACHED();
}
#endif
}
Time TimeManagement::now()
@@ -249,7 +255,8 @@ bool TimeManagement::is_hpet_periodic_mode_allowed()
}
}
UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_non_legacy_hardware_timers()
#if ARCH(I386) || ARCH(X86_64)
UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_x86_non_legacy_hardware_timers()
{
if (!ACPI::is_enabled())
return false;
@@ -323,7 +330,7 @@ UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_non_legacy_hardware_timers()
return true;
}
UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_legacy_hardware_timers()
UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_x86_legacy_hardware_timers()
{
if (ACPI::is_enabled()) {
if (ACPI::Parser::the()->x86_specific_flags().cmos_rtc_not_present) {
@@ -343,6 +350,7 @@ UNMAP_AFTER_INIT bool TimeManagement::probe_and_set_legacy_hardware_timers()
m_time_ticks_per_second = m_time_keeper_timer->ticks_per_second();
return true;
}
#endif
void TimeManagement::update_time(RegisterState const&)
{