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timer wait behavior is really fucked and debugging this is an awful pain so juust check todos

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This commit is contained in:
shockrahwow 2019-11-29 00:46:42 -08:00
parent e3317e5d64
commit 1fb8c16514
2 changed files with 9 additions and 3 deletions
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6
pit.c
View File

@ -4,7 +4,7 @@
#include "serial.h"
#include "stlio.h"
u32 timer_ticks = 0;
volatile u32 timer_ticks = 0;
void inc_ticks(struct cpu_reg_state* cpu) {
timer_ticks++;
@ -13,6 +13,10 @@ void inc_ticks(struct cpu_reg_state* cpu) {
}
}
void timer_wait(u32 time) {
u32 ticks = time + timer_ticks;
while(timer_ticks < ticks);
}
void pit_install_timer(void) {
init_irq_handler(0, inc_ticks); // timer interrupt request falls into int 0
}

2
pit.h
View File

@ -9,4 +9,6 @@
void inc_ticks(struct cpu_reg_state*);
void timer_wait(u32);
void pit_install_timer(void);