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| author | jasone <jasone@FreeBSD.org> | 2000-09-07 01:33:02 +0000 |
|---|---|---|
| committer | jasone <jasone@FreeBSD.org> | 2000-09-07 01:33:02 +0000 |
| commit | 769e0f974d8929599ba599ac496510fffc90ff34 (patch) | |
| tree | 9387522900085835de81e7830e570ef3f6b3ea80 /sys/amd64/include/cpu.h | |
| parent | acf1927de02afda4855ec278b1128fd9446405ea (diff) | |
| download | FreeBSD-src-769e0f974d8929599ba599ac496510fffc90ff34.zip FreeBSD-src-769e0f974d8929599ba599ac496510fffc90ff34.tar.gz | |
Major update to the way synchronization is done in the kernel. Highlights
include:
* Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The
alpha port is still in transition and currently uses both.)
* Per-CPU idle processes.
* Interrupts are run in their own separate kernel threads and can be
preempted (i386 only).
Partially contributed by: BSDi (BSD/OS)
Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
Diffstat (limited to 'sys/amd64/include/cpu.h')
| -rw-r--r-- | sys/amd64/include/cpu.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sys/amd64/include/cpu.h b/sys/amd64/include/cpu.h index ffabf7f..18822b8 100644 --- a/sys/amd64/include/cpu.h +++ b/sys/amd64/include/cpu.h @@ -46,6 +46,7 @@ #include <machine/psl.h> #include <machine/frame.h> #include <machine/segments.h> +#include <machine/globals.h> /* * definitions of cpu-dependent requirements @@ -86,7 +87,9 @@ * added, we will have an atomicy problem. The type of atomicy we need is * a non-locked orl. */ -#define need_resched() do { astpending = AST_RESCHED|AST_PENDING; } while (0) +#define need_resched() do { \ + PCPU_SET(astpending, AST_RESCHED|AST_PENDING); \ +} while (0) #define resched_wanted() (astpending & AST_RESCHED) /* @@ -109,8 +112,9 @@ * it off (asynchronous need_resched() conflicts are not critical). */ #define signotify(p) aston() - -#define aston() do { astpending |= AST_PENDING; } while (0) +#define aston() do { \ + PCPU_SET(astpending, astpending | AST_PENDING); \ +} while (0) #define astoff() /* @@ -135,7 +139,9 @@ #ifdef _KERNEL extern char btext[]; extern char etext[]; +#ifndef intr_nesting_level extern u_char intr_nesting_level; +#endif void fork_trampoline __P((void)); void fork_return __P((struct proc *, struct trapframe)); |
