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Spinlock save cpu flags

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This commit is contained in:
Kamil Kowalczyk
2026-03-12 22:48:34 +01:00
parent 19793e9126
commit 4760818118
50 changed files with 704 additions and 461 deletions
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26
kernel/device/ps2_kb.c
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@@ -148,14 +148,15 @@ static int32_t ps2kb_keycode (void) {
static void ps2kb_irq (void* arg, void* regs, struct reschedule_ctx* rctx) {
(void)arg, (void)regs;
uint64_t frb, fsq;
int32_t keycode = ps2kb_keycode ();
if (keycode <= 0 || keycode == 0xFA)
return;
spin_lock (&ps2kb_ringbuffer_lock);
spin_lock (&ps2kb_sq.lock);
spin_lock (&ps2kb_ringbuffer_lock, &frb);
spin_lock (&ps2kb_sq.lock, &fsq);
ringbuffer_push (uint8_t, &ps2kb_ringbuffer, (uint8_t)keycode);
@@ -165,20 +166,21 @@ static void ps2kb_irq (void* arg, void* regs, struct reschedule_ctx* rctx) {
struct proc_sq_entry* sq_entry = list_entry (node, struct proc_sq_entry, sq_link);
struct proc* resumed_proc = sq_entry->proc;
spin_unlock (&ps2kb_sq.lock);
spin_unlock (&ps2kb_ringbuffer_lock);
spin_unlock (&ps2kb_sq.lock, fsq);
spin_unlock (&ps2kb_ringbuffer_lock, frb);
proc_sq_resume (resumed_proc, sq_entry, rctx);
return;
}
spin_unlock (&ps2kb_sq.lock);
spin_unlock (&ps2kb_ringbuffer_lock);
spin_unlock (&ps2kb_sq.lock, fsq);
spin_unlock (&ps2kb_ringbuffer_lock, frb);
}
int ps2kb_read_key (struct device* device, struct proc* proc, struct reschedule_ctx* rctx, void* a1,
void* a2, void* a3, void* a4) {
(void)device, (void)a2, (void)a3, (void)a4;
uint64_t frb, fsq;
if (!(proc->procgroup->capabilities & PROC_CAP_KB))
return -ST_PERMISSION_ERROR;
@@ -188,7 +190,7 @@ int ps2kb_read_key (struct device* device, struct proc* proc, struct reschedule_
if (chbuf == NULL)
return -ST_BAD_ADDRESS_SPACE;
spin_lock (&ps2kb_ringbuffer_lock);
spin_lock (&ps2kb_ringbuffer_lock, &frb);
size_t prev_count = ps2kb_ringbuffer.count;
@@ -198,21 +200,21 @@ int ps2kb_read_key (struct device* device, struct proc* proc, struct reschedule_
/* didn't pop anything */
if (prev_count == new_count) {
spin_lock (&ps2kb_sq.lock);
spin_lock (&ps2kb_sq.lock, &fsq);
struct list_node_link* node = ps2kb_sq.proc_list;
spin_unlock (&ps2kb_sq.lock);
spin_unlock (&ps2kb_sq.lock, fsq);
if (node != NULL) {
spin_unlock (&ps2kb_ringbuffer_lock);
spin_unlock (&ps2kb_ringbuffer_lock, frb);
return -ST_PERMISSION_ERROR;
}
proc_sq_suspend (proc, &ps2kb_sq, &ps2kb_ringbuffer_lock, rctx);
proc_sq_suspend (proc, &ps2kb_sq, &ps2kb_ringbuffer_lock, frb, rctx);
return ST_OK;
}
spin_unlock (&ps2kb_ringbuffer_lock);
spin_unlock (&ps2kb_ringbuffer_lock, frb);
return ST_OK;
}