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26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # |
27 | # |
28 | 28 | ||
29 | .text |
29 | .text |
30 | 30 | ||
31 | .global atomic_inc |
- | |
32 | atomic_inc: |
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33 | pushl %ebx |
- | |
34 | movl 8(%esp),%ebx |
- | |
35 | #ifdef __SMP__ |
31 | #ifdef __SMP__ |
36 | lock incl (%ebx) |
- | |
37 | #else |
- | |
38 | incl (%ebx) |
- | |
39 | #endif |
- | |
40 | popl %ebx |
- | |
41 | ret |
- | |
42 | 32 | ||
43 | .global atomic_dec |
- | |
44 | atomic_dec: |
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45 | pushl %ebx |
- | |
46 | movl 8(%esp),%ebx |
- | |
47 | #ifdef __SMP__ |
- | |
48 | lock decl (%ebx) |
- | |
49 | #else |
- | |
50 | decl (%ebx) |
- | |
51 | #endif |
- | |
52 | popl %ebx |
- | |
53 | ret |
- | |
54 | - | ||
55 | - | ||
56 | #ifdef __SMP__ |
- | |
57 | - | ||
58 | - | ||
59 | .global test_and_set |
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60 | .global spinlock_arch |
33 | .global spinlock_arch |
61 | 34 | ||
62 | test_and_set: |
- | |
63 | pushl %ebx |
- | |
64 | - | ||
65 | movl 8(%esp),%ebx |
- | |
66 | movl $1,%eax |
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67 | xchgl %eax,(%ebx) # xchg implicitly turns on the LOCK signal |
- | |
68 | - | ||
69 | popl %ebx |
- | |
70 | ret |
- | |
71 | - | ||
72 | - | ||
73 | # |
35 | # |
74 | # This is a bus-and-hyperthreading-friendly implementation of spinlock |
36 | # This is a bus-and-hyperthreading-friendly implementation of spinlock |
75 | # |
37 | # |
76 | spinlock_arch: |
38 | spinlock_arch: |
77 | pushl %eax |
39 | pushl %eax |