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Kernel: Add RPi::Timer::get_clock_rate()

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This commit is contained in:
Daniel Bertalan 2023-05-15 07:46:26 +02:00 committed by Andrew Kaster
parent d9c557d0b4
commit 3beb488887
Notes: sideshowbarker 2024-07-18 03:20:18 +09:00 
Author: https://github.com/BertalanD
Commit: https://github.com/SerenityOS/serenity/commit/3beb488887
Pull-request: https://github.com/SerenityOS/serenity/pull/18845
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/FireFox317
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/caoimhebyrne ✅
2 changed files with 32 additions and 0 deletions
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31
Kernel/Arch/aarch64/RPi/Timer.cpp
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@ -151,4 +151,35 @@ u32 Timer::set_clock_rate(ClockID clock_id, u32 rate_hz, bool skip_setting_turbo
return message_queue.set_clock_rate.rate_hz;
}
class GetClockRateMboxMessage : Mailbox::Message {
public:
u32 clock_id;
u32 rate_hz;
GetClockRateMboxMessage()
: Mailbox::Message(0x0003'0002, 8)
{
clock_id = 0;
rate_hz = 0;
}
};
u32 Timer::get_clock_rate(ClockID clock_id)
{
struct __attribute__((aligned(16))) {
Mailbox::MessageHeader header;
GetClockRateMboxMessage get_clock_rate;
Mailbox::MessageTail tail;
} message_queue;
message_queue.get_clock_rate.clock_id = static_cast<u32>(clock_id);
if (!Mailbox::the().send_queue(&message_queue, sizeof(message_queue))) {
dbgln("Timer::get_clock_rate() failed!");
return 0;
}
return message_queue.get_clock_rate.rate_hz;
}
}

1
Kernel/Arch/aarch64/RPi/Timer.h
View file

@ -63,6 +63,7 @@ public:
PIXEL_BVB = 14,
};
static u32 set_clock_rate(ClockID, u32 rate_hz, bool skip_setting_turbo = true);
static u32 get_clock_rate(ClockID);
private:
Timer();