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spinlock: inline irqsaved spinlock

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Reference pull request: #12599

Signed-off-by: chao an <anchao@lixiang.com>
This commit is contained in:
chao an
2024-08-04 21:07:41 +08:00
committed by Xiang Xiao
parent 500ebd6498
commit 555dab3da3
2 changed files with 110 additions and 177 deletions
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sched/irq/irq_spinlock.c
+2 -162
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@@ -39,11 +39,11 @@
/* Used for access control */
static volatile spinlock_t g_irq_spin = SP_UNLOCKED;
volatile spinlock_t g_irq_spin = SP_UNLOCKED;
/* Handles nested calls to spin_lock_irqsave and spin_unlock_irqrestore */
static volatile uint8_t g_irq_spin_count[CONFIG_SMP_NCPUS];
volatile uint8_t g_irq_spin_count[CONFIG_SMP_NCPUS];
#ifdef CONFIG_RW_SPINLOCK
/* Used for access control */
@@ -60,166 +60,6 @@ static volatile uint8_t g_irq_rwspin_count[CONFIG_SMP_NCPUS];
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: spin_lock_irqsave
*
* Description:
* If SMP is enabled:
* If the argument lock is not specified (i.e. NULL),
* disable local interrupts and take the global spinlock (g_irq_spin)
* if the call counter (g_irq_spin_count[cpu]) equals to 0. Then the
* counter on the CPU is incremented to allow nested call and return
* the interrupt state.
*
* If the argument lock is specified,
* disable local interrupts and take the given lock and return the
* interrupt state.
*
* NOTE: This API is very simple to protect data (e.g. H/W register
* or internal data structure) in SMP mode. But do not use this API
* with kernel APIs which suspend a caller thread. (e.g. nxsem_wait)
*
* If SMP is not enabled:
* This function is equivalent to up_irq_save().
*
* Input Parameters:
* lock - Caller specific spinlock. If specified NULL, g_irq_spin is used
* and can be nested. Otherwise, nested call for the same lock
* would cause a deadlock
*
* Returned Value:
* An opaque, architecture-specific value that represents the state of
* the interrupts prior to the call to spin_lock_irqsave(lock);
*
****************************************************************************/
irqstate_t spin_lock_irqsave(spinlock_t *lock)
{
irqstate_t ret;
ret = up_irq_save();
if (NULL == lock)
{
int me = up_cpu_index();
if (0 == g_irq_spin_count[me])
{
spin_lock(&g_irq_spin);
}
g_irq_spin_count[me]++;
DEBUGASSERT(0 != g_irq_spin_count[me]);
}
else
{
spin_lock(lock);
}
return ret;
}
/****************************************************************************
* Name: spin_lock_irqsave_wo_note
****************************************************************************/
irqstate_t spin_lock_irqsave_wo_note(spinlock_t *lock)
{
irqstate_t ret;
ret = up_irq_save();
if (NULL == lock)
{
int me = up_cpu_index();
if (0 == g_irq_spin_count[me])
{
spin_lock_wo_note(&g_irq_spin);
}
g_irq_spin_count[me]++;
DEBUGASSERT(0 != g_irq_spin_count[me]);
}
else
{
spin_lock_wo_note(lock);
}
return ret;
}
/****************************************************************************
* Name: spin_unlock_irqrestore
*
* Description:
* If SMP is enabled:
* If the argument lock is not specified (i.e. NULL),
* decrement the call counter (g_irq_spin_count[cpu]) and if it
* decrements to zero then release the spinlock (g_irq_spin) and
* restore the interrupt state as it was prior to the previous call to
* spin_lock_irqsave(NULL).
*
* If the argument lock is specified, release the lock and restore
* the interrupt state as it was prior to the previous call to
* spin_lock_irqsave(lock).
*
* If SMP is not enabled:
* This function is equivalent to up_irq_restore().
*
* Input Parameters:
* lock - Caller specific spinlock. If specified NULL, g_irq_spin is used.
*
* flags - The architecture-specific value that represents the state of
* the interrupts prior to the call to spin_lock_irqsave(lock);
*
* Returned Value:
* None
*
****************************************************************************/
void spin_unlock_irqrestore(spinlock_t *lock, irqstate_t flags)
{
if (NULL == lock)
{
int me = up_cpu_index();
DEBUGASSERT(0 < g_irq_spin_count[me]);
g_irq_spin_count[me]--;
if (0 == g_irq_spin_count[me])
{
spin_unlock(&g_irq_spin);
}
}
else
{
spin_unlock(lock);
}
up_irq_restore(flags);
}
/****************************************************************************
* Name: spin_unlock_irqrestore_wo_note
****************************************************************************/
void spin_unlock_irqrestore_wo_note(spinlock_t *lock, irqstate_t flags)
{
if (NULL == lock)
{
int me = up_cpu_index();
DEBUGASSERT(0 < g_irq_spin_count[me]);
g_irq_spin_count[me]--;
if (0 == g_irq_spin_count[me])
{
spin_unlock_wo_note(&g_irq_spin);
}
}
else
{
spin_unlock_wo_note(lock);
}
up_irq_restore(flags);
}
#ifdef CONFIG_RW_SPINLOCK
/****************************************************************************