Commit c3052594 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Rafael J. Wysocki
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ACPICA: provide abstraction for raw_spinlock_t 



Provide a new lock type acpi_raw_spinlock which is implemented as
raw_spinlock_t on Linux. This type should be used in code which covers
small areas of code and disables interrupts only for short time even on
a realtime OS.
There is a fallback to spinlock_t if an OS does not provide an
implementation for acpi_raw_spinlock.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 75bc37fe

include/acpi/acpiosxf.h

+21 −0
Original line number Diff line number Diff line
@@ -97,6 +97,27 @@ acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock handle); 
void acpi_os_release_lock(acpi_spinlock handle, acpi_cpu_flags flags);

#endif



/*

 * RAW spinlock primitives. If the OS does not provide them, fallback to

 * spinlock primitives

 */

#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_create_raw_lock

# define acpi_os_create_raw_lock(out_handle)	acpi_os_create_lock(out_handle)

#endif



#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_delete_raw_lock

# define acpi_os_delete_raw_lock(handle)	acpi_os_delete_lock(handle)

#endif



#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_acquire_raw_lock

# define acpi_os_acquire_raw_lock(handle)	acpi_os_acquire_lock(handle)

#endif



#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_release_raw_lock

# define acpi_os_release_raw_lock(handle, flags)	\

	acpi_os_release_lock(handle, flags)

#endif



/*

 * Semaphore primitives

 */

include/acpi/actypes.h

+4 −0
Original line number Diff line number Diff line
@@ -245,6 +245,10 @@ typedef u64 acpi_physical_address; 
#define acpi_spinlock                   void *

#endif



#ifndef acpi_raw_spinlock

#define acpi_raw_spinlock		acpi_spinlock

#endif



#ifndef acpi_semaphore

#define acpi_semaphore                  void *

#endif

include/acpi/platform/aclinux.h

+5 −0
Original line number Diff line number Diff line
@@ -102,6 +102,7 @@ 


#define acpi_cache_t                        struct kmem_cache

#define acpi_spinlock                       spinlock_t *

#define acpi_raw_spinlock                   raw_spinlock_t *

#define acpi_cpu_flags                      unsigned long



/* Use native linux version of acpi_os_allocate_zeroed */
@@ -119,6 +120,10 @@ 
#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_acquire_object

#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_get_thread_id

#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_create_lock

#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_create_raw_lock

#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_delete_raw_lock

#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_acquire_raw_lock

#define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_release_raw_lock



/*

 * OSL interfaces used by debugger/disassembler

include/acpi/platform/aclinuxex.h

+30 −0
Original line number Diff line number Diff line
@@ -90,6 +90,36 @@ static inline acpi_thread_id acpi_os_get_thread_id(void) 
		lock ? AE_OK : AE_NO_MEMORY; \

	})





#define acpi_os_create_raw_lock(__handle) \

	({ \

		raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \

		if (lock) { \

			*(__handle) = lock; \

			raw_spin_lock_init(*(__handle)); \

		} \

		lock ? AE_OK : AE_NO_MEMORY; \

	})



static inline acpi_cpu_flags acpi_os_acquire_raw_lock(acpi_raw_spinlock lockp)

{

	acpi_cpu_flags flags;



	raw_spin_lock_irqsave(lockp, flags);

	return flags;

}



static inline void acpi_os_release_raw_lock(acpi_raw_spinlock lockp,

					    acpi_cpu_flags flags)

{

	raw_spin_unlock_irqrestore(lockp, flags);

}



static inline void acpi_os_delete_raw_lock(acpi_raw_spinlock handle)

{

	ACPI_FREE(handle);

}



static inline u8 acpi_os_readable(void *pointer, acpi_size length)

{

	return TRUE;

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