diff options
| author | bde <bde@FreeBSD.org> | 1995-05-11 07:44:40 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1995-05-11 07:44:40 +0000 |
| commit | ef98a885661c3d2f2fe8570c56dba5723d570c13 (patch) | |
| tree | 0d5164dc358e5c6acd11b945b1b53af7244beb76 /sys/i386/include | |
| parent | 561eb80e564511caf11e035642fba1a429106466 (diff) | |
| download | FreeBSD-src-ef98a885661c3d2f2fe8570c56dba5723d570c13.zip FreeBSD-src-ef98a885661c3d2f2fe8570c56dba5723d570c13.tar.gz | |
Add variable `idelayed' and macros setdelayed() and schedsofttty()
to access it. setdelayed() actually ORs the bits in `idelayed' into
`ipending' and clears `idelayed'.
Call setdelayed() every (normal) clock tick to convert delayed
interrupts into pending ones.
Drivers can set bits in `idelayed' at any time to schedule an interrupt
at the next clock tick. This is more efficient than calling timeout().
Currently only software interrupts can be scheduled.
Diffstat (limited to 'sys/i386/include')
| -rw-r--r-- | sys/i386/include/spl.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/i386/include/spl.h b/sys/i386/include/spl.h index 3ffc50f..1db479f 100644 --- a/sys/i386/include/spl.h +++ b/sys/i386/include/spl.h @@ -30,7 +30,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: spl.h,v 1.6 1994/12/30 12:42:15 bde Exp $ + * $Id: spl.h,v 1.7 1995/05/11 00:13:01 wollman Exp $ */ #ifndef _MACHINE_IPL_H_ @@ -74,6 +74,7 @@ extern unsigned bio_imask; /* group of interrupts masked with splbio() */ extern unsigned cpl; /* current priority level mask */ +extern volatile unsigned idelayed; /* interrupts to become pending */ extern volatile unsigned ipending; /* active interrupts masked by cpl */ extern unsigned net_imask; /* group of interrupts masked with splimp() */ extern unsigned stat_imask; /* interrupts masked with splstatclock() */ @@ -85,11 +86,14 @@ extern unsigned tty_imask; /* group of interrupts masked with spltty() */ * it is changed. Pretending that ipending is a plain int happens to give * suitable atomic code for "ipending |= constant;". */ +#define setdelayed() (*(unsigned *)&ipending |= loadandclear(&idelayed)) #define setsoftast() (*(unsigned *)&ipending |= SWI_AST_PENDING) #define setsoftclock() (*(unsigned *)&ipending |= SWI_CLOCK_PENDING) #define setsoftnet() (*(unsigned *)&ipending |= SWI_NET_PENDING) #define setsofttty() (*(unsigned *)&ipending |= SWI_TTY_PENDING) +#define schedsofttty() (*(unsigned *)&idelayed |= SWI_TTY_PENDING) + void unpend_V __P((void)); #ifdef __GNUC__ |
