diff options
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/arm/include/smp/spinlock.h | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/src/arch/arm/include/smp/spinlock.h b/src/arch/arm/include/smp/spinlock.h deleted file mode 100644 index e7aa3679ce..0000000000 --- a/src/arch/arm/include/smp/spinlock.h +++ /dev/null @@ -1,54 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ - -#ifndef ARCH_SMP_SPINLOCK_H -#define ARCH_SMP_SPINLOCK_H - -/* FIXME: implement this for ARM */ -#error "implement this for ARM" -#if 0 -/* - * Your basic SMP spinlocks, allowing only a single CPU anywhere - */ - -typedef struct { - volatile unsigned int lock; -} spinlock_t; - - -#define SPIN_LOCK_UNLOCKED (spinlock_t) { 1 } -#define DECLARE_SPIN_LOCK(x) static spinlock_t x = SPIN_LOCK_UNLOCKED; - -#define barrier() (__asm__ __volatile__("" : : : "memory")) -#define spin_is_locked(x) (*(volatile char *)(&(x)->lock) != 0) -#define spin_unlock_wait(x) do { barrier(); } while (spin_is_locked(x)) - -static __always_inline void spin_lock(spinlock_t *lock) -{ - unsigned long tmp; - __asm__ __volatile__ ( - "1: ldrex %0, [%1]\n" - " teq %0, #0\n" - " strexeq %0, %2, [%1]\n" - " teqeq %0, #0\n" - " bne 1b\n" - : "=&r" (tmp) - : "r" (&lock->lock), "r" (1) - : "cc" - ); - barrier(); -} - -static __always_inline void spin_unlock(spinlock_t *lock) -{ - __asm__ __volatile__( - " str %1, [%0]\n" - : - : "r" (&lock->lock), "r" (0) - : "cc" - ); -} - -#define cpu_relax() barrier() - -#endif -#endif /* ARCH_SMP_SPINLOCK_H */ |