/*
- * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#define enaLkDeb 0x00000001 /* Request debug in default attribute */
#define enaLkStat 0x00000002 /* Request statistic in default attribute */
+#define disLkRWPrio 0x00000004 /* Disable RW lock priority promotion */
-#endif
+#endif /* MACH_KERNEL_PRIVATE */
-#ifdef MACH_KERNEL_PRIVATE
+#if defined(MACH_KERNEL_PRIVATE)
typedef struct {
- unsigned long interlock;
- unsigned long lck_spin_pad[9]; /* XXX - usimple_lock_data_t */
+ volatile uintptr_t interlock;
+#if MACH_LDEBUG
+ unsigned long lck_spin_pad[9]; /* XXX - usimple_lock_data_t */
+#endif
} lck_spin_t;
#define LCK_SPIN_TAG_DESTROYED 0x00002007 /* lock marked as Destroyed */
-#else
+#else /* MACH_KERNEL_PRIVATE */
#ifdef KERNEL_PRIVATE
typedef struct {
unsigned long opaque[10];
} lck_spin_t;
-#else
+#else /* KERNEL_PRIVATE */
typedef struct __lck_spin_t__ lck_spin_t;
#endif
#endif
#ifdef MACH_KERNEL_PRIVATE
+/* The definition of this structure, including the layout of the
+ * state bitfield, is tailored to the asm implementation in i386_lock.s
+ */
typedef struct _lck_mtx_ {
union {
struct {
- volatile uintptr_t lck_mtxd_owner;
- unsigned long lck_mtxd_ptr;
- volatile uint32_t lck_mtxd_waiters:16,
- lck_mtxd_pri:8,
- lck_mtxd_ilocked:1,
- lck_mtxd_mlocked:1,
- lck_mtxd_promoted:1,
- lck_mtxd_spin:1,
- lck_mtxd_pad4:4; /* padding */
-#ifdef __x86_64__
- unsigned int lck_mtxd_pad;
-#endif
- } lck_mtxd;
+ volatile uintptr_t lck_mtx_owner;
+ union {
+ struct {
+ volatile uint32_t
+ lck_mtx_waiters:16,
+ lck_mtx_pri:8,
+ lck_mtx_ilocked:1,
+ lck_mtx_mlocked:1,
+ lck_mtx_promoted:1,
+ lck_mtx_spin:1,
+ lck_mtx_is_ext:1,
+ lck_mtx_pad3:3;
+ };
+ uint32_t lck_mtx_state;
+ };
+ /* Pad field used as a canary, initialized to ~0 */
+ uint32_t lck_mtx_pad32;
+ };
struct {
- unsigned long lck_mtxi_tag;
- struct _lck_mtx_ext_ *lck_mtxi_ptr;
- unsigned long lck_mtxi_pad;
- } lck_mtxi;
- } lck_mtx_sw;
+ struct _lck_mtx_ext_ *lck_mtx_ptr;
+ uint32_t lck_mtx_tag;
+ uint32_t lck_mtx_pad32_2;
+ };
+ };
} lck_mtx_t;
-#define lck_mtx_owner lck_mtx_sw.lck_mtxd.lck_mtxd_owner
-#define lck_mtx_waiters lck_mtx_sw.lck_mtxd.lck_mtxd_waiters
-#define lck_mtx_pri lck_mtx_sw.lck_mtxd.lck_mtxd_pri
-#define lck_mtx_ilocked lck_mtx_sw.lck_mtxd.lck_mtxd_ilocked
-#define lck_mtx_mlocked lck_mtx_sw.lck_mtxd.lck_mtxd_mlocked
-#define lck_mtx_promoted lck_mtx_sw.lck_mtxd.lck_mtxd_promoted
-#define lck_mtx_spin lck_mtx_sw.lck_mtxd.lck_mtxd_spin
-
-#define lck_mtx_tag lck_mtx_sw.lck_mtxi.lck_mtxi_tag
-#define lck_mtx_ptr lck_mtx_sw.lck_mtxi.lck_mtxi_ptr
-#define lck_mtx_state lck_mtx_sw.lck_mtxi.lck_mtxi_pad
-
-#define LCK_MTX_TAG_INDIRECT 0x00001007 /* lock marked as Indirect */
-#define LCK_MTX_TAG_DESTROYED 0x00002007 /* lock marked as Destroyed */
-#define LCK_MTX_PTR_EXTENDED 0x00003007 /* lock is extended version */
+/* This pattern must subsume the interlocked, mlocked and spin bits */
+#define LCK_MTX_TAG_INDIRECT 0x07ff1007 /* lock marked as Indirect */
+#define LCK_MTX_TAG_DESTROYED 0x07fe2007 /* lock marked as Destroyed */
/* Adaptive spin before blocking */
-extern unsigned int MutexSpin;
+extern uint64_t MutexSpin;
extern int lck_mtx_lock_spinwait_x86(lck_mtx_t *mutex);
extern void lck_mtx_lock_wait_x86(lck_mtx_t *mutex);
extern void lck_mtx_lock_acquire_x86(lck_mtx_t *mutex);
-extern void lck_mtx_unlock_wakeup_x86(lck_mtx_t *mutex, int owner_was_promoted);
+extern void lck_mtx_unlock_wakeup_x86(lck_mtx_t *mutex, int prior_lock_state);
extern void lck_mtx_lock_mark_destroyed(lck_mtx_t *mutex);
-extern int lck_mtx_lock_mark_promoted(lck_mtx_t *mutex);
-extern int lck_mtx_lock_decr_waiter(lck_mtx_t *mutex);
extern int lck_mtx_lock_grab_mutex(lck_mtx_t *mutex);
-extern integer_t lck_mtx_lock_get_pri(lck_mtx_t *mutex);
-extern void hw_lock_byte_init(uint8_t *lock_byte);
-extern void hw_lock_byte_lock(uint8_t *lock_byte);
-extern void hw_lock_byte_unlock(uint8_t *lock_byte);
+extern void hw_lock_byte_init(volatile uint8_t *lock_byte);
+extern void hw_lock_byte_lock(volatile uint8_t *lock_byte);
+extern void hw_lock_byte_unlock(volatile uint8_t *lock_byte);
typedef struct {
unsigned int type;
-#ifdef __x86_64__
unsigned int pad4;
-#endif
vm_offset_t pc;
vm_offset_t thread;
} lck_mtx_deb_t;
lck_mtx_t lck_mtx;
struct _lck_grp_ *lck_mtx_grp;
unsigned int lck_mtx_attr;
-#ifdef __x86_64__
unsigned int lck_mtx_pad1;
-#endif
lck_mtx_deb_t lck_mtx_deb;
uint64_t lck_mtx_stat;
-#ifdef __x86_64__
unsigned int lck_mtx_pad2[2];
-#endif
} lck_mtx_ext_t;
#define LCK_MTX_ATTR_DEBUG 0x1
#define LCK_MTX_ATTR_STAT 0x2
#define LCK_MTX_ATTR_STATb 1
+#define LCK_MTX_EVENT(lck) ((event_t)(((unsigned int*)(lck))+(sizeof(lck_mtx_t)-1)/sizeof(unsigned int)))
+#define LCK_EVENT_TO_MUTEX(event) ((lck_mtx_t *)(uintptr_t)(((unsigned int *)(event)) - ((sizeof(lck_mtx_t)-1)/sizeof(unsigned int))))
+
+#else /* MACH_KERNEL_PRIVATE */
+#ifdef XNU_KERNEL_PRIVATE
+typedef struct {
+ unsigned long opaque[2];
+} lck_mtx_t;
+
+typedef struct {
+ unsigned long opaque[10];
+} lck_mtx_ext_t;
#else
#ifdef KERNEL_PRIVATE
typedef struct {
- unsigned long opaque[3];
+ unsigned long opaque[2];
} lck_mtx_t;
typedef struct {
typedef struct __lck_mtx_ext_t__ lck_mtx_ext_t;
#endif
#endif
+#endif
#ifdef MACH_KERNEL_PRIVATE
#pragma pack(1) /* Make sure the structure stays as we defined it */
typedef struct _lck_rw_t_internal_ {
volatile uint16_t lck_rw_shared_count; /* No. of accepted readers */
- uint8_t lck_rw_interlock; /* Interlock byte */
+ volatile uint8_t lck_rw_interlock; /* Interlock byte */
volatile uint8_t
lck_rw_priv_excl:1, /* Writers prioritized if set */
lck_rw_want_upgrade:1, /* Read-to-write upgrade waiting */
* are in
*/
uint32_t lck_rw_pad8;
-#ifdef __x86_64__
uint32_t lck_rw_pad12;
-#endif
} lck_rw_t;
#pragma pack()
#define LCK_RW_TAG_DESTROYED 0x00002007 /* lock marked as Destroyed */
+#define RW_LOCK_READER_EVENT(x) ((event_t) (((unsigned char*) (x)) + (offsetof(lck_rw_t, lck_rw_tag))))
+#define RW_LOCK_WRITER_EVENT(x) ((event_t) (((unsigned char*) (x)) + (offsetof(lck_rw_t, lck_rw_pad8))))
+#define READ_EVENT_TO_RWLOCK(x) ((lck_rw_t *)(((unsigned char*)(x) - (offsetof(lck_rw_t, lck_rw_tag)))))
+#define WRITE_EVENT_TO_RWLOCK(x) ((lck_rw_t *)(((unsigned char*)(x) - (offsetof(lck_rw_t, lck_rw_pad8)))))
+
+#if LOCK_PRIVATE
+
+#define disable_preemption_for_thread(t) ((cpu_data_t GS_RELATIVE *)0UL)->cpu_preemption_level++
+
+#define LCK_MTX_THREAD_TO_STATE(t) ((uintptr_t)t)
+#define PLATFORM_LCK_ILOCK 0
+
+#define LOCK_SNOOP_SPINS 1000
+#define LOCK_PRETEST 1
+
+/* Spinlock panic deadline, in mach_absolute_time units (ns on i386) */
+#define LOCK_PANIC_TIMEOUT 0xf00000 /* 250 ms (huge) */
+
+#endif // LOCK_PRIVATE
+
#else
#ifdef KERNEL_PRIVATE
#pragma pack(1)
typedef struct {
uint32_t opaque[3];
-#ifdef __x86_64__
uint32_t opaque4;
-#endif
} lck_rw_t;
#pragma pack()
#else
#endif
#endif
+#ifdef MACH_KERNEL_PRIVATE
+
+extern void kernel_preempt_check (void);
+
+#endif /* MACH_KERNEL_PRIVATE */
+
#endif /* _I386_LOCKS_H_ */
projects / apple / xnu.git / blobdiff