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Minor tweaks to the resume code that might help people debug.

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* Add hw.acpi.resume_beep tunable and sysctl, default to 0.  Beeps the PC
speaker soon after waking to diagnose whether the wakeup code is even
getting run before other drivers possibly hang the system.  To stop the beep,
cause another beep (i.e. keyboard bell).  Submitted by takawata@, I changed
the frequency to be lower.

* Use 4096 instead of 4 byte alignment.  Might be useful although doesn't
seem to be necessary.

* Remove a useless assignment to acpi_reset_video.  It was overwritten by
the default sysctl value anyway.
This commit is contained in:
Nate Lawson 2006-06-08 17:54:10 +00:00
parent bb34821048
commit 64297e67ab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=159409
3 changed files with 26 additions and 5 deletions
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8
sys/i386/acpica/acpi_machdep.c
View File

@ -52,7 +52,9 @@ __FBSDID("$FreeBSD$");
#include <i386/bios/apm.h>
uint32_t acpi_reset_video = 1;
uint32_t acpi_resume_beep;
TUNABLE_INT("hw.acpi.resume_beep", &acpi_resume_beep);
uint32_t acpi_reset_video;
TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
static int intr_model = ACPI_INTR_PIC;
@ -318,6 +320,10 @@ acpi_machdep_init(device_t dev)
else
acpi_SetIntrModel(intr_model);
SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
"resume_beep", CTLFLAG_RD | CTLFLAG_RW, &acpi_resume_beep, 0,
"Beep the PC speaker when resuming");
SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
"reset_video", CTLFLAG_RD | CTLFLAG_RW, &acpi_reset_video, 0,

21
sys/i386/acpica/acpi_wakecode.S
View File

@ -34,7 +34,7 @@
#include "assym.s"
.align 4
.align 4096
.code16
wakeup_16:
nop
@ -49,9 +49,21 @@ wakeup_16:
movw %ax,%ss
movw $PAGE_SIZE,%sp
/* To debug resume hangs, beep the speaker if the user requested. */
cmpl $1,resume_beep
jne nobeep
movb $0xc0,%al
outb %al,$0x42
movb $0x04,%al
outb %al,$0x42
inb $0x61,%al
orb $0x3,%al
outb %al,$0x61
nobeep:
/* Re-initialize video BIOS if the reset_video tunable is set. */
cmp $0,reset_video
je wakeup_16_gdt
cmpl $1,reset_video
jne nobiosreset
lcall $0xc000,$3
/*
@ -61,8 +73,8 @@ wakeup_16:
movw %cs,%ax
movw %ax,%ds
movw %ax,%ss
nobiosreset:
wakeup_16_gdt:
/* Load GDT for real mode */
lgdt physical_gdt
@ -220,6 +232,7 @@ physical_esp: .long 0
previous_cr2: .long 0
previous_cr3: .long 0
previous_cr4: .long 0
resume_beep: .long 0
reset_video: .long 0
/* transfer from real mode to protected mode */

2
sys/i386/acpica/acpi_wakeup.c
View File

@ -56,6 +56,7 @@ __FBSDID("$FreeBSD$");
#error this file needs sys/cdefs.h as a prerequisite
#endif
extern uint32_t acpi_resume_beep;
extern uint32_t acpi_reset_video;
extern void initializecpu(void);
@ -227,6 +228,7 @@ acpi_sleep_machdep(struct acpi_softc *sc, int state)
WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
WAKECODE_FIXUP(resume_beep, uint32_t, acpi_resume_beep);
WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);