diff options
| author | bde <bde@FreeBSD.org> | 1996-06-17 12:50:22 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1996-06-17 12:50:22 +0000 |
| commit | ab552bbee7d360284da684e84cef05f4e5f242a7 (patch) | |
| tree | 5896a9d86f514fcad8744e68e87f7c0751ba84e6 /sys | |
| parent | 501044728620e5a296b82f0ab2bae44a27b2d661 (diff) | |
| download | FreeBSD-src-ab552bbee7d360284da684e84cef05f4e5f242a7.zip FreeBSD-src-ab552bbee7d360284da684e84cef05f4e5f242a7.tar.gz | |
In getit(), use read_eflags()/write_eflags() to preserve the interrupt
enable flag instead of enable_intr() to restore it to its usual state.
getit() is only called from DELAY() so there is no point in optimising
its speed (this wasn't so clear when it was extern), and using
enable_intr() made it inconvenient to call DELAY() from probes that need
to run with interrupts disabled.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/amd64/amd64/tsc.c | 11 | ||||
| -rw-r--r-- | sys/amd64/isa/clock.c | 11 | ||||
| -rw-r--r-- | sys/i386/i386/tsc.c | 11 | ||||
| -rw-r--r-- | sys/i386/isa/clock.c | 11 | ||||
| -rw-r--r-- | sys/isa/atrtc.c | 11 |
5 files changed, 40 insertions, 15 deletions
diff --git a/sys/amd64/amd64/tsc.c b/sys/amd64/amd64/tsc.c index 21b9e36..1b1c2d8 100644 --- a/sys/amd64/amd64/tsc.c +++ b/sys/amd64/amd64/tsc.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)clock.c 7.2 (Berkeley) 5/12/91 - * $Id: clock.c,v 1.59 1996/06/11 16:02:55 pst Exp $ + * $Id: clock.c,v 1.60 1996/06/11 16:11:27 pst Exp $ */ /* @@ -286,14 +286,19 @@ DDB_printrtc(void) static int getit(void) { + u_long ef; int high, low; + ef = read_eflags(); disable_intr(); - /* select timer0 and latch counter value */ + + /* Select timer0 and latch counter value. */ outb(TIMER_MODE, TIMER_SEL0); + low = inb(TIMER_CNTR0); high = inb(TIMER_CNTR0); - enable_intr(); + + write_eflags(ef); return ((high << 8) | low); } diff --git a/sys/amd64/isa/clock.c b/sys/amd64/isa/clock.c index 21b9e36..1b1c2d8 100644 --- a/sys/amd64/isa/clock.c +++ b/sys/amd64/isa/clock.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)clock.c 7.2 (Berkeley) 5/12/91 - * $Id: clock.c,v 1.59 1996/06/11 16:02:55 pst Exp $ + * $Id: clock.c,v 1.60 1996/06/11 16:11:27 pst Exp $ */ /* @@ -286,14 +286,19 @@ DDB_printrtc(void) static int getit(void) { + u_long ef; int high, low; + ef = read_eflags(); disable_intr(); - /* select timer0 and latch counter value */ + + /* Select timer0 and latch counter value. */ outb(TIMER_MODE, TIMER_SEL0); + low = inb(TIMER_CNTR0); high = inb(TIMER_CNTR0); - enable_intr(); + + write_eflags(ef); return ((high << 8) | low); } diff --git a/sys/i386/i386/tsc.c b/sys/i386/i386/tsc.c index 21b9e36..1b1c2d8 100644 --- a/sys/i386/i386/tsc.c +++ b/sys/i386/i386/tsc.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)clock.c 7.2 (Berkeley) 5/12/91 - * $Id: clock.c,v 1.59 1996/06/11 16:02:55 pst Exp $ + * $Id: clock.c,v 1.60 1996/06/11 16:11:27 pst Exp $ */ /* @@ -286,14 +286,19 @@ DDB_printrtc(void) static int getit(void) { + u_long ef; int high, low; + ef = read_eflags(); disable_intr(); - /* select timer0 and latch counter value */ + + /* Select timer0 and latch counter value. */ outb(TIMER_MODE, TIMER_SEL0); + low = inb(TIMER_CNTR0); high = inb(TIMER_CNTR0); - enable_intr(); + + write_eflags(ef); return ((high << 8) | low); } diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c index 21b9e36..1b1c2d8 100644 --- a/sys/i386/isa/clock.c +++ b/sys/i386/isa/clock.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)clock.c 7.2 (Berkeley) 5/12/91 - * $Id: clock.c,v 1.59 1996/06/11 16:02:55 pst Exp $ + * $Id: clock.c,v 1.60 1996/06/11 16:11:27 pst Exp $ */ /* @@ -286,14 +286,19 @@ DDB_printrtc(void) static int getit(void) { + u_long ef; int high, low; + ef = read_eflags(); disable_intr(); - /* select timer0 and latch counter value */ + + /* Select timer0 and latch counter value. */ outb(TIMER_MODE, TIMER_SEL0); + low = inb(TIMER_CNTR0); high = inb(TIMER_CNTR0); - enable_intr(); + + write_eflags(ef); return ((high << 8) | low); } diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c index 21b9e36..1b1c2d8 100644 --- a/sys/isa/atrtc.c +++ b/sys/isa/atrtc.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)clock.c 7.2 (Berkeley) 5/12/91 - * $Id: clock.c,v 1.59 1996/06/11 16:02:55 pst Exp $ + * $Id: clock.c,v 1.60 1996/06/11 16:11:27 pst Exp $ */ /* @@ -286,14 +286,19 @@ DDB_printrtc(void) static int getit(void) { + u_long ef; int high, low; + ef = read_eflags(); disable_intr(); - /* select timer0 and latch counter value */ + + /* Select timer0 and latch counter value. */ outb(TIMER_MODE, TIMER_SEL0); + low = inb(TIMER_CNTR0); high = inb(TIMER_CNTR0); - enable_intr(); + + write_eflags(ef); return ((high << 8) | low); } |
