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Moved splhigh()/spl0() calls from isa_configure() to configure() so that

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there is a natural place to initialize `safepri' in a future commit.
Spinoffs:
- spl0() gets called in the unlikely event that isa is not configured.
- configure() has better control over enabling interrupts.
- it is now less unclear that interrupts aren't actually enabled early.
  Rev.1.48 of autoconf.c seems to have done the opposite of what was
  intended - moving the isa_configure() call delayed the spl0() side
  effect.
Added some comments about the bogons.  Removed the splhigh() call since
it is a no-op.
This commit is contained in:
Bruce Evans 1997-11-21 18:14:02 +00:00
parent 10974dbd20
commit cc8ae84672
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=31336
4 changed files with 28 additions and 8 deletions
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14
sys/amd64/amd64/autoconf.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
* $Id: autoconf.c,v 1.79 1997/11/20 17:07:21 bde Exp $
* $Id: autoconf.c,v 1.80 1997/11/21 05:44:07 peter Exp $
*/
/*
@ -200,6 +200,12 @@ configure(dummy)
* XXX behavior to no longer rely on interrupts or to register an
* XXX interrupt_driven_config_hook for the task.
*/
/*
* XXX The above is wrong, because we're implicitly at splhigh(),
* XXX and should stay there, so enabling interrupts in the CPU
* XXX and the ICU at most gives pending interrupts which just get
* XXX in the way.
*/
#ifdef APIC_IO
bsp_apic_configure();
enable_intr();
@ -224,6 +230,12 @@ configure(dummy)
isa_configure();
#endif
/*
* Now we're ready to handle (pending) interrupts.
* XXX this is slightly misplaced.
*/
spl0();
#if NCARD > 0
/* After everyone else has a chance at grabbing resources */
pccard_configure();

4
sys/amd64/isa/isa.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
* $Id: isa.c,v 1.105 1997/09/21 21:41:18 gibbs Exp $
* $Id: isa.c,v 1.106 1997/10/12 08:31:41 jkh Exp $
*/
/*
@ -351,7 +351,6 @@ void
isa_configure() {
struct isa_device *dvp;
splhigh();
printf("Probing for devices on the ISA bus:\n");
/* First probe all the sensitive probes */
for (dvp = isa_devtab_tty; dvp->id_driver; dvp++)
@ -431,7 +430,6 @@ isa_configure() {
register_imask(dvp, cam_imask);
for (dvp = isa_devtab_null; dvp->id_driver; dvp++)
register_imask(dvp, SWI_CLOCK_MASK);
spl0();
}
/*

14
sys/i386/i386/autoconf.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
* $Id: autoconf.c,v 1.79 1997/11/20 17:07:21 bde Exp $
* $Id: autoconf.c,v 1.80 1997/11/21 05:44:07 peter Exp $
*/
/*
@ -200,6 +200,12 @@ configure(dummy)
* XXX behavior to no longer rely on interrupts or to register an
* XXX interrupt_driven_config_hook for the task.
*/
/*
* XXX The above is wrong, because we're implicitly at splhigh(),
* XXX and should stay there, so enabling interrupts in the CPU
* XXX and the ICU at most gives pending interrupts which just get
* XXX in the way.
*/
#ifdef APIC_IO
bsp_apic_configure();
enable_intr();
@ -224,6 +230,12 @@ configure(dummy)
isa_configure();
#endif
/*
* Now we're ready to handle (pending) interrupts.
* XXX this is slightly misplaced.
*/
spl0();
#if NCARD > 0
/* After everyone else has a chance at grabbing resources */
pccard_configure();

4
sys/i386/isa/isa.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
* $Id: isa.c,v 1.105 1997/09/21 21:41:18 gibbs Exp $
* $Id: isa.c,v 1.106 1997/10/12 08:31:41 jkh Exp $
*/
/*
@ -351,7 +351,6 @@ void
isa_configure() {
struct isa_device *dvp;
splhigh();
printf("Probing for devices on the ISA bus:\n");
/* First probe all the sensitive probes */
for (dvp = isa_devtab_tty; dvp->id_driver; dvp++)
@ -431,7 +430,6 @@ isa_configure() {
register_imask(dvp, cam_imask);
for (dvp = isa_devtab_null; dvp->id_driver; dvp++)
register_imask(dvp, SWI_CLOCK_MASK);
spl0();
}
/*