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This commit is contained in:
Yi-Ting Shih
2025-05-03 22:29:36 +08:00
parent e73f90395d
commit 8d1045f20d
6 changed files with 41 additions and 168 deletions
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153
kernel/lib/timer.c
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@@ -7,34 +7,8 @@
#define CORE0_TIMER_IRQ_CTRL ((volatile uint32_t *)0x40000040)
timer_t *global_timer = (timer_t *)0x0;
MMIO_W_HELPER(_enable_timer_irq, CORE0_TIMER_IRQ_CTRL, 0x1, 1);
static inline
task_t _make_timer_task(uint64_t interval_s, task_callback_func_t func,
uint64_t param)
{
uint64_t cntpct_el0, cntfrq_el0;
R_SYSREG(cntpct_el0, cntpct_el0);
R_SYSREG(cntfrq_el0, cntfrq_el0);
return (task_t){
.firing_tick = cntpct_el0 + interval_s * cntfrq_el0,
.interval = interval_s * cntfrq_el0,
.func = func,
.param = param,
};
}
static inline
void _scheduler_timeout(uint64_t)
{
add_timer_task(_make_timer_task(1, _scheduler_timeout, 0x0));
schedule();
}
void timer_init()
{
uint64_t cntkctl_el1, cntfrq_el0;
@@ -44,94 +18,7 @@ void timer_init()
_enable_timer_irq(true);
R_SYSREG(cntfrq_el0, cntfrq_el0);
W_SYSREG(cntp_tval_el0, cntfrq_el0 >> 1);
return;
add_timer_task(_make_timer_task(1, _scheduler_timeout, 0x0));
}
static inline
uint32_t _d(timer_t *t)
{ return t ? t->_d : 0; }
static inline
void _swap(timer_t **a, timer_t **b)
{
timer_t *tmp = *a;
*a = *b, *b = tmp;
}
static inline
timer_t *_merge(timer_t *a, timer_t *b)
{
if (!a || !b)
return a ?: b;
if (a->data.firing_tick > b->data.firing_tick)
_swap(&a, &b);
a->_r = _merge(a->_r, b);
if (_d(a->_l) < _d(a->_r))
_swap(&a->_l, &a->_r);
a->_d = _d(a->_r) + 1;
return a;
}
static inline
timer_t *_pop(timer_t *t)
{
if (!t || (!t->_l && !t->_r)) {
kfree(t);
return (timer_t *)0x0;
}
return _merge(t->_l, t->_r);
}
static inline
void _check_enable_timer()
{
if (global_timer) {
uint64_t cntpct_el0;
R_SYSREG(cntpct_el0, cntpct_el0);
DEBUG_EXCEP(cntpct_el0);
if (global_timer->data.firing_tick < cntpct_el0)
W_SYSREG(cntp_tval_el0, 1);
else
W_SYSREG(cntp_cval_el0, global_timer->data.firing_tick);
W_SYSREG(cntp_ctl_el0, 1);
} else
W_SYSREG(cntp_ctl_el0, 0);
}
static inline
void _traverse(timer_t *t)
{
if (!t) return;
DEBUG_EXCEP(t->data.firing_tick);
t->data.func(t->data.param);
_traverse(t->_l);
_traverse(t->_r);
}
void add_timer_task(task_t task)
{
DEBUG_EXCEP("add timer task");
timer_t *newtimer = kmalloc(sizeof(timer_t));
*newtimer = (timer_t){
._l = (timer_t *)0x0,
._r = (timer_t *)0x0,
._d = 0,
.data = task,
};
global_timer = _merge(global_timer, newtimer);
// _traverse(global_timer);
_check_enable_timer();
W_SYSREG(cntp_tval_el0, cntfrq_el0 >> 5);
}
void sleep(uint64_t ms)
@@ -149,42 +36,10 @@ void sleep(uint64_t ms)
}
}
typedef struct {
interrupt_callback_func_t func;
uint64_t param;
} _timer_task_wrapper_param_t;
static inline
void _timer_task_wrapper(uint64_t param)
{
_timer_task_wrapper_param_t *data = (void *)param;
data->func(data->param);
kfree(data);
_enable_timer_irq(true);
}
void timer_irq_handler(void)
{
_enable_timer_irq(false);
uint64_t cntfrq_el0;
R_SYSREG(cntfrq_el0, cntfrq_el0);
W_SYSREG(cntp_tval_el0, cntfrq_el0 >> 5);
schedule();
_enable_timer_irq(true);
return;
uint64_t cntpct_el0;
R_SYSREG(cntpct_el0, cntpct_el0);
LOG("timer irq"); DEBUG_EXCEP(cntpct_el0);
if (global_timer) {
_timer_task_wrapper_param_t *param =
kmalloc(sizeof(_timer_task_wrapper_param_t));
*param = (_timer_task_wrapper_param_t){
.func = global_timer->data.func,
.param = global_timer->data.param,
};
add_interrupt_task(20, _timer_task_wrapper, (uint64_t)param);
global_timer = _pop(global_timer);
_check_enable_timer();
}
}