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-rw-r--r--include/asm-ia64/mmu.h8
-rw-r--r--include/asm-ia64/mmu_context.h54
-rw-r--r--include/asm-ia64/rwsem.h35
-rw-r--r--include/asm-ia64/spinlock.h33
4 files changed, 79 insertions, 51 deletions
diff --git a/include/asm-ia64/mmu.h b/include/asm-ia64/mmu.h
index ae1525352a25..611432ba579c 100644
--- a/include/asm-ia64/mmu.h
+++ b/include/asm-ia64/mmu.h
@@ -2,10 +2,12 @@
#define __MMU_H
/*
- * Type for a context number. We declare it volatile to ensure proper ordering when it's
- * accessed outside of spinlock'd critical sections (e.g., as done in activate_mm() and
- * init_new_context()).
+ * Type for a context number. We declare it volatile to ensure proper
+ * ordering when it's accessed outside of spinlock'd critical sections
+ * (e.g., as done in activate_mm() and init_new_context()).
*/
typedef volatile unsigned long mm_context_t;
+typedef unsigned long nv_mm_context_t;
+
#endif
diff --git a/include/asm-ia64/mmu_context.h b/include/asm-ia64/mmu_context.h
index e3e5fededb04..0680d163be97 100644
--- a/include/asm-ia64/mmu_context.h
+++ b/include/asm-ia64/mmu_context.h
@@ -55,34 +55,46 @@ static inline void
delayed_tlb_flush (void)
{
extern void local_flush_tlb_all (void);
+ unsigned long flags;
if (unlikely(__ia64_per_cpu_var(ia64_need_tlb_flush))) {
- local_flush_tlb_all();
- __ia64_per_cpu_var(ia64_need_tlb_flush) = 0;
+ spin_lock_irqsave(&ia64_ctx.lock, flags);
+ {
+ if (__ia64_per_cpu_var(ia64_need_tlb_flush)) {
+ local_flush_tlb_all();
+ __ia64_per_cpu_var(ia64_need_tlb_flush) = 0;
+ }
+ }
+ spin_unlock_irqrestore(&ia64_ctx.lock, flags);
}
}
-static inline mm_context_t
+static inline nv_mm_context_t
get_mmu_context (struct mm_struct *mm)
{
unsigned long flags;
- mm_context_t context = mm->context;
-
- if (context)
- return context;
-
- spin_lock_irqsave(&ia64_ctx.lock, flags);
- {
- /* re-check, now that we've got the lock: */
- context = mm->context;
- if (context == 0) {
- cpus_clear(mm->cpu_vm_mask);
- if (ia64_ctx.next >= ia64_ctx.limit)
- wrap_mmu_context(mm);
- mm->context = context = ia64_ctx.next++;
+ nv_mm_context_t context = mm->context;
+
+ if (unlikely(!context)) {
+ spin_lock_irqsave(&ia64_ctx.lock, flags);
+ {
+ /* re-check, now that we've got the lock: */
+ context = mm->context;
+ if (context == 0) {
+ cpus_clear(mm->cpu_vm_mask);
+ if (ia64_ctx.next >= ia64_ctx.limit)
+ wrap_mmu_context(mm);
+ mm->context = context = ia64_ctx.next++;
+ }
}
+ spin_unlock_irqrestore(&ia64_ctx.lock, flags);
}
- spin_unlock_irqrestore(&ia64_ctx.lock, flags);
+ /*
+ * Ensure we're not starting to use "context" before any old
+ * uses of it are gone from our TLB.
+ */
+ delayed_tlb_flush();
+
return context;
}
@@ -104,7 +116,7 @@ destroy_context (struct mm_struct *mm)
}
static inline void
-reload_context (mm_context_t context)
+reload_context (nv_mm_context_t context)
{
unsigned long rid;
unsigned long rid_incr = 0;
@@ -138,7 +150,7 @@ reload_context (mm_context_t context)
static inline void
activate_context (struct mm_struct *mm)
{
- mm_context_t context;
+ nv_mm_context_t context;
do {
context = get_mmu_context(mm);
@@ -157,8 +169,6 @@ activate_context (struct mm_struct *mm)
static inline void
activate_mm (struct mm_struct *prev, struct mm_struct *next)
{
- delayed_tlb_flush();
-
/*
* We may get interrupts here, but that's OK because interrupt handlers cannot
* touch user-space.
diff --git a/include/asm-ia64/rwsem.h b/include/asm-ia64/rwsem.h
index 6ece5061dc19..e18b5ab0cb75 100644
--- a/include/asm-ia64/rwsem.h
+++ b/include/asm-ia64/rwsem.h
@@ -3,6 +3,7 @@
*
* Copyright (C) 2003 Ken Chen <kenneth.w.chen@intel.com>
* Copyright (C) 2003 Asit Mallick <asit.k.mallick@intel.com>
+ * Copyright (C) 2005 Christoph Lameter <clameter@sgi.com>
*
* Based on asm-i386/rwsem.h and other architecture implementation.
*
@@ -11,9 +12,9 @@
*
* The lock count is initialized to 0 (no active and no waiting lockers).
*
- * When a writer subtracts WRITE_BIAS, it'll get 0xffff0001 for the case
- * of an uncontended lock. Readers increment by 1 and see a positive value
- * when uncontended, negative if there are writers (and maybe) readers
+ * When a writer subtracts WRITE_BIAS, it'll get 0xffffffff00000001 for
+ * the case of an uncontended lock. Readers increment by 1 and see a positive
+ * value when uncontended, negative if there are writers (and maybe) readers
* waiting (in which case it goes to sleep).
*/
@@ -29,7 +30,7 @@
* the semaphore definition
*/
struct rw_semaphore {
- signed int count;
+ signed long count;
spinlock_t wait_lock;
struct list_head wait_list;
#if RWSEM_DEBUG
@@ -37,10 +38,10 @@ struct rw_semaphore {
#endif
};
-#define RWSEM_UNLOCKED_VALUE 0x00000000
-#define RWSEM_ACTIVE_BIAS 0x00000001
-#define RWSEM_ACTIVE_MASK 0x0000ffff
-#define RWSEM_WAITING_BIAS (-0x00010000)
+#define RWSEM_UNLOCKED_VALUE __IA64_UL_CONST(0x0000000000000000)
+#define RWSEM_ACTIVE_BIAS __IA64_UL_CONST(0x0000000000000001)
+#define RWSEM_ACTIVE_MASK __IA64_UL_CONST(0x00000000ffffffff)
+#define RWSEM_WAITING_BIAS -__IA64_UL_CONST(0x0000000100000000)
#define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS
#define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS)
@@ -83,7 +84,7 @@ init_rwsem (struct rw_semaphore *sem)
static inline void
__down_read (struct rw_semaphore *sem)
{
- int result = ia64_fetchadd4_acq((unsigned int *)&sem->count, 1);
+ long result = ia64_fetchadd8_acq((unsigned long *)&sem->count, 1);
if (result < 0)
rwsem_down_read_failed(sem);
@@ -95,7 +96,7 @@ __down_read (struct rw_semaphore *sem)
static inline void
__down_write (struct rw_semaphore *sem)
{
- int old, new;
+ long old, new;
do {
old = sem->count;
@@ -112,7 +113,7 @@ __down_write (struct rw_semaphore *sem)
static inline void
__up_read (struct rw_semaphore *sem)
{
- int result = ia64_fetchadd4_rel((unsigned int *)&sem->count, -1);
+ long result = ia64_fetchadd8_rel((unsigned long *)&sem->count, -1);
if (result < 0 && (--result & RWSEM_ACTIVE_MASK) == 0)
rwsem_wake(sem);
@@ -124,7 +125,7 @@ __up_read (struct rw_semaphore *sem)
static inline void
__up_write (struct rw_semaphore *sem)
{
- int old, new;
+ long old, new;
do {
old = sem->count;
@@ -141,7 +142,7 @@ __up_write (struct rw_semaphore *sem)
static inline int
__down_read_trylock (struct rw_semaphore *sem)
{
- int tmp;
+ long tmp;
while ((tmp = sem->count) >= 0) {
if (tmp == cmpxchg_acq(&sem->count, tmp, tmp+1)) {
return 1;
@@ -156,7 +157,7 @@ __down_read_trylock (struct rw_semaphore *sem)
static inline int
__down_write_trylock (struct rw_semaphore *sem)
{
- int tmp = cmpxchg_acq(&sem->count, RWSEM_UNLOCKED_VALUE,
+ long tmp = cmpxchg_acq(&sem->count, RWSEM_UNLOCKED_VALUE,
RWSEM_ACTIVE_WRITE_BIAS);
return tmp == RWSEM_UNLOCKED_VALUE;
}
@@ -167,7 +168,7 @@ __down_write_trylock (struct rw_semaphore *sem)
static inline void
__downgrade_write (struct rw_semaphore *sem)
{
- int old, new;
+ long old, new;
do {
old = sem->count;
@@ -182,7 +183,7 @@ __downgrade_write (struct rw_semaphore *sem)
* Implement atomic add functionality. These used to be "inline" functions, but GCC v3.1
* doesn't quite optimize this stuff right and ends up with bad calls to fetchandadd.
*/
-#define rwsem_atomic_add(delta, sem) atomic_add(delta, (atomic_t *)(&(sem)->count))
-#define rwsem_atomic_update(delta, sem) atomic_add_return(delta, (atomic_t *)(&(sem)->count))
+#define rwsem_atomic_add(delta, sem) atomic64_add(delta, (atomic64_t *)(&(sem)->count))
+#define rwsem_atomic_update(delta, sem) atomic64_add_return(delta, (atomic64_t *)(&(sem)->count))
#endif /* _ASM_IA64_RWSEM_H */
diff --git a/include/asm-ia64/spinlock.h b/include/asm-ia64/spinlock.h
index 909936f25512..d2430aa0d49d 100644
--- a/include/asm-ia64/spinlock.h
+++ b/include/asm-ia64/spinlock.h
@@ -93,7 +93,15 @@ _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
# endif /* CONFIG_MCKINLEY */
#endif
}
+
#define _raw_spin_lock(lock) _raw_spin_lock_flags(lock, 0)
+
+/* Unlock by doing an ordered store and releasing the cacheline with nta */
+static inline void _raw_spin_unlock(spinlock_t *x) {
+ barrier();
+ asm volatile ("st4.rel.nta [%0] = r0\n\t" :: "r"(x));
+}
+
#else /* !ASM_SUPPORTED */
#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
# define _raw_spin_lock(x) \
@@ -109,16 +117,16 @@ do { \
} while (ia64_spinlock_val); \
} \
} while (0)
+#define _raw_spin_unlock(x) do { barrier(); ((spinlock_t *) x)->lock = 0; } while (0)
#endif /* !ASM_SUPPORTED */
#define spin_is_locked(x) ((x)->lock != 0)
-#define _raw_spin_unlock(x) do { barrier(); ((spinlock_t *) x)->lock = 0; } while (0)
#define _raw_spin_trylock(x) (cmpxchg_acq(&(x)->lock, 0, 1) == 0)
#define spin_unlock_wait(x) do { barrier(); } while ((x)->lock)
typedef struct {
- volatile unsigned int read_counter : 31;
- volatile unsigned int write_lock : 1;
+ volatile unsigned int read_counter : 24;
+ volatile unsigned int write_lock : 8;
#ifdef CONFIG_PREEMPT
unsigned int break_lock;
#endif
@@ -174,6 +182,13 @@ do { \
(result == 0); \
})
+static inline void _raw_write_unlock(rwlock_t *x)
+{
+ u8 *y = (u8 *)x;
+ barrier();
+ asm volatile ("st1.rel.nta [%0] = r0\n\t" :: "r"(y+3) : "memory" );
+}
+
#else /* !ASM_SUPPORTED */
#define _raw_write_lock(l) \
@@ -195,14 +210,14 @@ do { \
(ia64_val == 0); \
})
+static inline void _raw_write_unlock(rwlock_t *x)
+{
+ barrier();
+ x->write_lock = 0;
+}
+
#endif /* !ASM_SUPPORTED */
#define _raw_read_trylock(lock) generic_raw_read_trylock(lock)
-#define _raw_write_unlock(x) \
-({ \
- smp_mb__before_clear_bit(); /* need barrier before releasing lock... */ \
- clear_bit(31, (x)); \
-})
-
#endif /* _ASM_IA64_SPINLOCK_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 06:08:29 +0000