Function cvmx_spinlock_lock

freebsd/contrib/octeon-sdk/cvmx-spinlock.h:160–177

* Gets lock, spins until lock is taken * * @param lock pointer to lock structure */

 * @param lock   pointer to lock structure
 */
static inline void cvmx_spinlock_lock(cvmx_spinlock_t *lock)
{
    unsigned int tmp;

    __asm__ __volatile__(
    ".set noreorder         \n"
    "1: ll   %[tmp], %[val]  \n"
    "   bnez %[tmp], 1b     \n"
    "   li   %[tmp], 1      \n"
    "   sc   %[tmp], %[val] \n"
    "   beqz %[tmp], 1b     \n"
    "   nop                \n"
    ".set reorder           \n"
    : [val] "+m" (lock->value), [tmp] "=&r" (tmp)
    :
    : "memory");

}