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-rw-r--r--include/asm-mips/spinlock.h299
1 files changed, 0 insertions, 299 deletions
diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h
deleted file mode 100644
index 114d3eb98a6..00000000000
--- a/include/asm-mips/spinlock.h
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1999, 2000 by Ralf Baechle
- * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
- */
-#ifndef _ASM_SPINLOCK_H
-#define _ASM_SPINLOCK_H
-
-#include <linux/config.h>
-#include <asm/war.h>
-
-/*
- * Your basic SMP spinlocks, allowing only a single CPU anywhere
- */
-
-typedef struct {
- volatile unsigned int lock;
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} spinlock_t;
-
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
-
-#define spin_lock_init(x) do { (x)->lock = 0; } while(0)
-
-#define spin_is_locked(x) ((x)->lock != 0)
-#define spin_unlock_wait(x) do { barrier(); } while ((x)->lock)
-#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
-
-/*
- * Simple spin lock operations. There are two variants, one clears IRQ's
- * on the local processor, one does not.
- *
- * We make no fairness assumptions. They have a cost.
- */
-
-static inline void _raw_spin_lock(spinlock_t *lock)
-{
- unsigned int tmp;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # _raw_spin_lock \n"
- "1: ll %1, %2 \n"
- " bnez %1, 1b \n"
- " li %1, 1 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " nop \n"
- " sync \n"
- " .set reorder \n"
- : "=m" (lock->lock), "=&r" (tmp)
- : "m" (lock->lock)
- : "memory");
- } else {
- __asm__ __volatile__(
- " .set noreorder # _raw_spin_lock \n"
- "1: ll %1, %2 \n"
- " bnez %1, 1b \n"
- " li %1, 1 \n"
- " sc %1, %0 \n"
- " beqz %1, 1b \n"
- " sync \n"
- " .set reorder \n"
- : "=m" (lock->lock), "=&r" (tmp)
- : "m" (lock->lock)
- : "memory");
- }
-}
-
-static inline void _raw_spin_unlock(spinlock_t *lock)
-{
- __asm__ __volatile__(
- " .set noreorder # _raw_spin_unlock \n"
- " sync \n"
- " sw $0, %0 \n"
- " .set\treorder \n"
- : "=m" (lock->lock)
- : "m" (lock->lock)
- : "memory");
-}
-
-static inline unsigned int _raw_spin_trylock(spinlock_t *lock)
-{
- unsigned int temp, res;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # _raw_spin_trylock \n"
- "1: ll %0, %3 \n"
- " ori %2, %0, 1 \n"
- " sc %2, %1 \n"
- " beqzl %2, 1b \n"
- " nop \n"
- " andi %2, %0, 1 \n"
- " sync \n"
- " .set reorder"
- : "=&r" (temp), "=m" (lock->lock), "=&r" (res)
- : "m" (lock->lock)
- : "memory");
- } else {
- __asm__ __volatile__(
- " .set noreorder # _raw_spin_trylock \n"
- "1: ll %0, %3 \n"
- " ori %2, %0, 1 \n"
- " sc %2, %1 \n"
- " beqz %2, 1b \n"
- " andi %2, %0, 1 \n"
- " sync \n"
- " .set reorder"
- : "=&r" (temp), "=m" (lock->lock), "=&r" (res)
- : "m" (lock->lock)
- : "memory");
- }
-
- return res == 0;
-}
-
-/*
- * Read-write spinlocks, allowing multiple readers but only one writer.
- *
- * NOTE! it is quite common to have readers in interrupts but no interrupt
- * writers. For those circumstances we can "mix" irq-safe locks - any writer
- * needs to get a irq-safe write-lock, but readers can get non-irqsafe
- * read-locks.
- */
-
-typedef struct {
- volatile unsigned int lock;
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} rwlock_t;
-
-#define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
-
-#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
-
-static inline void _raw_read_lock(rwlock_t *rw)
-{
- unsigned int tmp;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # _raw_read_lock \n"
- "1: ll %1, %2 \n"
- " bltz %1, 1b \n"
- " addu %1, 1 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " nop \n"
- " sync \n"
- " .set reorder \n"
- : "=m" (rw->lock), "=&r" (tmp)
- : "m" (rw->lock)
- : "memory");
- } else {
- __asm__ __volatile__(
- " .set noreorder # _raw_read_lock \n"
- "1: ll %1, %2 \n"
- " bltz %1, 1b \n"
- " addu %1, 1 \n"
- " sc %1, %0 \n"
- " beqz %1, 1b \n"
- " sync \n"
- " .set reorder \n"
- : "=m" (rw->lock), "=&r" (tmp)
- : "m" (rw->lock)
- : "memory");
- }
-}
-
-/* Note the use of sub, not subu which will make the kernel die with an
- overflow exception if we ever try to unlock an rwlock that is already
- unlocked or is being held by a writer. */
-static inline void _raw_read_unlock(rwlock_t *rw)
-{
- unsigned int tmp;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- "1: ll %1, %2 # _raw_read_unlock \n"
- " sub %1, 1 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " sync \n"
- : "=m" (rw->lock), "=&r" (tmp)
- : "m" (rw->lock)
- : "memory");
- } else {
- __asm__ __volatile__(
- " .set noreorder # _raw_read_unlock \n"
- "1: ll %1, %2 \n"
- " sub %1, 1 \n"
- " sc %1, %0 \n"
- " beqz %1, 1b \n"
- " sync \n"
- " .set reorder \n"
- : "=m" (rw->lock), "=&r" (tmp)
- : "m" (rw->lock)
- : "memory");
- }
-}
-
-static inline void _raw_write_lock(rwlock_t *rw)
-{
- unsigned int tmp;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # _raw_write_lock \n"
- "1: ll %1, %2 \n"
- " bnez %1, 1b \n"
- " lui %1, 0x8000 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " nop \n"
- " sync \n"
- " .set reorder \n"
- : "=m" (rw->lock), "=&r" (tmp)
- : "m" (rw->lock)
- : "memory");
- } else {
- __asm__ __volatile__(
- " .set noreorder # _raw_write_lock \n"
- "1: ll %1, %2 \n"
- " bnez %1, 1b \n"
- " lui %1, 0x8000 \n"
- " sc %1, %0 \n"
- " beqz %1, 1b \n"
- " nop \n"
- " sync \n"
- " .set reorder \n"
- : "=m" (rw->lock), "=&r" (tmp)
- : "m" (rw->lock)
- : "memory");
- }
-}
-
-static inline void _raw_write_unlock(rwlock_t *rw)
-{
- __asm__ __volatile__(
- " sync # _raw_write_unlock \n"
- " sw $0, %0 \n"
- : "=m" (rw->lock)
- : "m" (rw->lock)
- : "memory");
-}
-
-#define _raw_read_trylock(lock) generic_raw_read_trylock(lock)
-
-static inline int _raw_write_trylock(rwlock_t *rw)
-{
- unsigned int tmp;
- int ret;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # _raw_write_trylock \n"
- " li %2, 0 \n"
- "1: ll %1, %3 \n"
- " bnez %1, 2f \n"
- " lui %1, 0x8000 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " nop \n"
- " sync \n"
- " li %2, 1 \n"
- " .set reorder \n"
- "2: \n"
- : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
- : "m" (rw->lock)
- : "memory");
- } else {
- __asm__ __volatile__(
- " .set noreorder # _raw_write_trylock \n"
- " li %2, 0 \n"
- "1: ll %1, %3 \n"
- " bnez %1, 2f \n"
- " lui %1, 0x8000 \n"
- " sc %1, %0 \n"
- " beqz %1, 1b \n"
- " sync \n"
- " li %2, 1 \n"
- " .set reorder \n"
- "2: \n"
- : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
- : "m" (rw->lock)
- : "memory");
- }
-
- return ret;
-}
-
-#endif /* _ASM_SPINLOCK_H */
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