Subversion Repositories HelenOS

Rev

Rev 2787 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 2787 Rev 3425
Line 35... Line 35...
35
#ifndef KERN_sparc64_ATOMIC_H_
35
#ifndef KERN_sparc64_ATOMIC_H_
36
#define KERN_sparc64_ATOMIC_H_
36
#define KERN_sparc64_ATOMIC_H_
37
 
37
 
38
#include <arch/barrier.h>
38
#include <arch/barrier.h>
39
#include <arch/types.h>
39
#include <arch/types.h>
-
 
40
#include <preemption.h>
40
 
41
 
41
/** Atomic add operation.
42
/** Atomic add operation.
42
 *
43
 *
43
 * Use atomic compare and swap operation to atomically add signed value.
44
 * Use atomic compare and swap operation to atomically add signed value.
44
 *
45
 *
Line 54... Line 55...
54
    do {
55
    do {
55
        volatile uintptr_t x = (uint64_t) &val->count;
56
        volatile uintptr_t x = (uint64_t) &val->count;
56
 
57
 
57
        a = *((uint64_t *) x);
58
        a = *((uint64_t *) x);
58
        b = a + i;
59
        b = a + i;
59
        asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *)x)), "+r" (b) : "r" (a));
60
        asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *)x)),
-
 
61
            "+r" (b) : "r" (a));
60
    } while (a != b);
62
    } while (a != b);
61
 
63
 
62
    return a;
64
    return a;
63
}
65
}
64
 
66
 
Line 95... Line 97...
95
static inline long test_and_set(atomic_t *val)
97
static inline long test_and_set(atomic_t *val)
96
{
98
{
97
    uint64_t v = 1;
99
    uint64_t v = 1;
98
    volatile uintptr_t x = (uint64_t) &val->count;
100
    volatile uintptr_t x = (uint64_t) &val->count;
99
 
101
 
100
    asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *) x)), "+r" (v) : "r" (0));
102
    asm volatile ("casx %0, %2, %1\n" : "+m" (*((uint64_t *) x)),
-
 
103
        "+r" (v) : "r" (0));
101
 
104
 
102
    return v;
105
    return v;
103
}
106
}
104
 
107
 
105
static inline void atomic_lock_arch(atomic_t *val)
108
static inline void atomic_lock_arch(atomic_t *val)
Line 107... Line 110...
107
    uint64_t tmp1 = 1;
110
    uint64_t tmp1 = 1;
108
    uint64_t tmp2 = 0;
111
    uint64_t tmp2 = 0;
109
 
112
 
110
    volatile uintptr_t x = (uint64_t) &val->count;
113
    volatile uintptr_t x = (uint64_t) &val->count;
111
 
114
 
-
 
115
    preemption_disable();
-
 
116
 
112
    asm volatile (
117
    asm volatile (
113
    "0:\n"
118
    "0:\n"
114
        "casx %0, %3, %1\n"
119
        "casx %0, %3, %1\n"
115
        "brz %1, 2f\n"
120
        "brz %1, 2f\n"
116
        "nop\n"
121
        "nop\n"