From 58633d29b872f9cf171f00bcf2804bb2c28e3d74 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Mon, 11 Aug 2025 16:01:16 -0400 Subject: kernel: timer: Add flags field + TIMER_MONOTONIC Sometimes we may rely on a specific kind of timer. While we are able to grab scheduler specific timers, general purpose timers, etc. One might need to for example, check whether their general purpose timer timer is monotonic or not. Signed-off-by: Ian Moffett --- sys/arch/amd64/amd64/hpet.c | 1 + sys/arch/amd64/amd64/lapic.c | 1 + sys/include/dev/timer.h | 5 +++++ 3 files changed, 7 insertions(+) diff --git a/sys/arch/amd64/amd64/hpet.c b/sys/arch/amd64/amd64/hpet.c index 3b0ca46..9191bee 100644 --- a/sys/arch/amd64/amd64/hpet.c +++ b/sys/arch/amd64/amd64/hpet.c @@ -197,6 +197,7 @@ hpet_init(void) timer.get_time_usec = hpet_time_usec; timer.get_time_nsec = hpet_time_nsec; timer.get_time_sec = hpet_time_sec; + timer.flags = TIMER_MONOTONIC; register_timer(TIMER_GP, &timer); return 0; } diff --git a/sys/arch/amd64/amd64/lapic.c b/sys/arch/amd64/amd64/lapic.c index 022592c..ceb5428 100644 --- a/sys/arch/amd64/amd64/lapic.c +++ b/sys/arch/amd64/amd64/lapic.c @@ -364,5 +364,6 @@ lapic_init(void) lapic_timer.name = "LAPIC_INTEGRATED_TIMER"; lapic_timer.stop = lapic_timer_stop; lapic_timer.oneshot_us = lapic_timer_oneshot_us; + lapic_timer.flags = 0; register_timer(TIMER_SCHED, &lapic_timer); } diff --git a/sys/include/dev/timer.h b/sys/include/dev/timer.h index fe91323..2ca6d62 100644 --- a/sys/include/dev/timer.h +++ b/sys/include/dev/timer.h @@ -31,11 +31,15 @@ #define _DEV_TIMER_H_ #include +#include /* Timer IDs */ #define TIMER_SCHED 0x00000000U /* Scheduler reserved timer */ #define TIMER_GP 0x00000001U /* General purpose timer */ +/* Timer flags */ +#define TIMER_MONOTONIC BIT(0) + /* Number of timer IDs, adjust when adding timer IDs */ #define TIMER_ID_COUNT 2 @@ -79,6 +83,7 @@ struct timer { void(*oneshot_ms)(size_t ms); void(*oneshot_us)(size_t ms); void(*stop)(void); + uint8_t flags; }; tmrr_status_t register_timer(timer_id_t id, const struct timer *tmr); -- cgit v1.2.3