diff options
| author | Gordon Willem Klok <gwk@cvs.openbsd.org> | 2007-11-03 20:58:31 +0000 |
|---|---|---|
| committer | Gordon Willem Klok <gwk@cvs.openbsd.org> | 2007-11-03 20:58:31 +0000 |
| commit | 5d81872aedf347a92ede87e4ddfe06286f71d510 (patch) | |
| tree | 9beeaf6718521c0c0b0496984b6aca4cac714190 /sys/arch/amd64 | |
| parent | 172fba44f6ca1e2563d8b9914c4f24aa18b8eca3 (diff) | |
Add acpi_acquire_global_lock(), and acpi_release_global_lock to
amd64 the not ghetto architecture.
ok toby@
Diffstat (limited to 'sys/arch/amd64')
| -rw-r--r-- | sys/arch/amd64/amd64/locore.S | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/sys/arch/amd64/amd64/locore.S b/sys/arch/amd64/amd64/locore.S index 7a382441870..c08b504cd86 100644 --- a/sys/arch/amd64/amd64/locore.S +++ b/sys/arch/amd64/amd64/locore.S @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.S,v 1.24 2007/10/10 15:53:51 art Exp $ */ +/* $OpenBSD: locore.S,v 1.25 2007/11/03 20:58:30 gwk Exp $ */ /* $NetBSD: locore.S,v 1.13 2004/03/25 18:33:17 drochner Exp $ */ /* @@ -115,6 +115,7 @@ #include "lapic.h" #include "ioapic.h" #include "ksyms.h" +#include "acpi.h" #include <sys/errno.h> #include <sys/syscall.h> @@ -1084,3 +1085,31 @@ ENTRY(pagezero) jne 1b sfence ret + +#if NACPI > 0 +ENTRY(acpi_acquire_global_lock) + movq %rdi, %rcx +1: movl (%rcx), %eax + movl %eax, %edx + andl $~1, %edx + btsl $1, %edx + adcl $0, %edx + lock + cmpxchgl %edx, (%rcx) + jnz 1b + andl $3, %edx + cmpl $3, %edx + sbb %eax, %eax + ret + +ENTRY(acpi_release_global_lock) + movq %rdi, %rcx +1: movl (%rcx), %eax + movl %eax, %edx + andl $~3, %edx + lock + cmpxchgl %edx, (%rcx) + jnz 1b + andl $1, %eax + ret +#endif |