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lib: utils/timer: Expose timer update function

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Exposing the ACLINT timer update APIs so the user can update the mtimer
after waking up from the non-retentive suspend.

Reviewed-by: Cyan Yang <cyan.yang@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Link: https://lore.kernel.org/r/20251020-cache-upstream-v7-10-69a132447d8a@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Nick Hu
2025-10-20 14:34:12 +08:00
committed by Anup Patel
parent 1514a32730
commit 8f8c393155
2 changed files with 31 additions and 12 deletions
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5
include/sbi_utils/timer/aclint_mtimer.h
View File

@ -42,6 +42,11 @@ struct aclint_mtimer_data {
void (*time_wr)(bool timecmp, u64 value, volatile u64 *addr);
};
struct aclint_mtimer_data *aclint_get_mtimer_data(void);
void aclint_mtimer_update(struct aclint_mtimer_data *mt,
struct aclint_mtimer_data *ref);
void aclint_mtimer_sync(struct aclint_mtimer_data *mt);
void aclint_mtimer_set_reference(struct aclint_mtimer_data *mt,

38
lib/utils/timer/aclint_mtimer.c
View File

@ -109,10 +109,34 @@ static struct sbi_timer_device mtimer = {
.timer_event_stop = mtimer_event_stop
};
void aclint_mtimer_sync(struct aclint_mtimer_data *mt)
struct aclint_mtimer_data *aclint_get_mtimer_data(void)
{
return mtimer_get_hart_data_ptr(sbi_scratch_thishart_ptr());
}
void aclint_mtimer_update(struct aclint_mtimer_data *mt,
struct aclint_mtimer_data *ref)
{
u64 v1, v2, mv, delta;
u64 *mt_time_val, *ref_time_val;
if (!mt || !ref || !mt->time_rd || !mt->time_wr || !ref->time_rd)
return;
mt_time_val = (void *)mt->mtime_addr;
ref_time_val = (void *)ref->mtime_addr;
if (!atomic_raw_xchg_ulong(&mt->time_delta_computed, 1)) {
v1 = mt->time_rd(mt_time_val);
mv = ref->time_rd(ref_time_val);
v2 = mt->time_rd(mt_time_val);
delta = mv - ((v1 / 2) + (v2 / 2));
mt->time_wr(false, mt->time_rd(mt_time_val) + delta,
mt_time_val);
}
}
void aclint_mtimer_sync(struct aclint_mtimer_data *mt)
{
struct aclint_mtimer_data *reference;
/* Sync-up non-shared MTIME if reference is available */
@ -120,17 +144,7 @@ void aclint_mtimer_sync(struct aclint_mtimer_data *mt)
return;
reference = mt->time_delta_reference;
mt_time_val = (void *)mt->mtime_addr;
ref_time_val = (void *)reference->mtime_addr;
if (!atomic_raw_xchg_ulong(&mt->time_delta_computed, 1)) {
v1 = mt->time_rd(mt_time_val);
mv = reference->time_rd(ref_time_val);
v2 = mt->time_rd(mt_time_val);
delta = mv - ((v1 / 2) + (v2 / 2));
mt->time_wr(false, mt->time_rd(mt_time_val) + delta,
mt_time_val);
}
aclint_mtimer_update(mt, reference);
}
void aclint_mtimer_set_reference(struct aclint_mtimer_data *mt,