diff options
Diffstat (limited to 'kernel/drivers')
| -rw-r--r-- | kernel/drivers/acpi.c | 15 | ||||
| -rw-r--r-- | kernel/drivers/timer.c | 6 |
2 files changed, 13 insertions, 8 deletions
diff --git a/kernel/drivers/acpi.c b/kernel/drivers/acpi.c index 999c0ed..15007d7 100644 --- a/kernel/drivers/acpi.c +++ b/kernel/drivers/acpi.c @@ -74,15 +74,18 @@ void acpi_install() hpet = find_sdt(rsdt, HPET_MAGIC); } -void hpet_install() +void hpet_install(int period) { if (hpet && hpet->legacy_replacement && hpet->comparator_count > 0) { struct hpet_registers *r = (struct hpet_registers *)hpet->address.phys; - printf("HPET tick period: %dns\n", r->features.tick_period / 1000000); - printf("Periodic support: %d\n", r->timer.periodic_support); - r->config.enable = 1; - r->config.legacy_replacement = 1; - r->timer.enable = 1; + printf("HPET tick period: %dns\n", r->tick_period / 1000000); + if ((r->timer0 & hpet_periodic_support) == hpet_periodic_support) { + r->config |= hpet_enable; + r->config |= hpet_legacy_replacement; + r->timer0 |= hpet_periodic | hpet_set_accumulator | hpet_enable_timer; + r->timer_comparator0 = r->tick_period + period; + r->timer_comparator0 = period; + } } else { hpet = NULL; } diff --git a/kernel/drivers/timer.c b/kernel/drivers/timer.c index 79e3cd8..788e286 100644 --- a/kernel/drivers/timer.c +++ b/kernel/drivers/timer.c @@ -1,5 +1,6 @@ // MIT License, Copyright (c) 2020 Marvin Borner +#include <acpi.h> #include <cpu.h> #include <def.h> #include <interrupts.h> @@ -19,7 +20,6 @@ u32 timer_get() return timer_ticks; } -// Executed 1000 times per second void timer_handler() { timer_ticks++; @@ -39,6 +39,8 @@ void timer_wait(u32 ticks) // Install timer handler into IRQ0 void timer_install() { - timer_phase(1000); + hpet_install(10000); // TODO: Find optimal femtosecond period + if (!hpet) + timer_phase(1000); irq_install_handler(0, timer_handler); } |