| version 1.18, 2013/12/09 09:35:16 |
version 1.19, 2022/04/06 22:47:58 |
| Line 101 ENTRY(mutex_spin_enter, 0) |
|
| Line 101 ENTRY(mutex_spin_enter, 0) |
|
| mfpr $PR_IPL, %r2 /* get current IPL */ |
mfpr $PR_IPL, %r2 /* get current IPL */ |
| movzbl MTX_IPL(%r0), %r3 |
movzbl MTX_IPL(%r0), %r3 |
| cmpl %r3, %r2 /* does mutex have > IPL? */ |
cmpl %r3, %r2 /* does mutex have > IPL? */ |
| bleq 1f /* no, leave IPL alone */ |
bleq 1f /* no, leave IPL alone */ |
| mtpr %r3, $PR_IPL /* yes, raise IPL */ |
mtpr %r3, $PR_IPL /* yes, raise IPL */ |
| 1: mfpr $PR_SSP, %r4 /* get curlwp */ |
1: mfpr $PR_SSP, %r4 /* get curlwp */ |
| movl L_CPU(%r4),%r4 /* get cpu_info */ |
movl L_CPU(%r4),%r4 /* get cpu_info */ |
| Line 137 ENTRY(mutex_spin_exit, 0) |
|
| Line 137 ENTRY(mutex_spin_exit, 0) |
|
| incl CI_MTX_COUNT(%r4) /* incr mtx count */ |
incl CI_MTX_COUNT(%r4) /* incr mtx count */ |
| bneq 1f /* still held? */ |
bneq 1f /* still held? */ |
| mtpr %r2, $PR_IPL /* no, restore saved ipl */ |
mtpr %r2, $PR_IPL /* no, restore saved ipl */ |
| 1: ret |
1: ret |
| |
|
| #if defined(DIAGNOSTIC) || defined(MULTIPROCESSOR) |
#if defined(DIAGNOSTIC) || defined(MULTIPROCESSOR) |
| 2: callg (%ap), _C_LABEL(mutex_vector_exit) /* slow path */ |
2: callg (%ap), _C_LABEL(mutex_vector_exit) /* slow path */ |
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