diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2007-11-15 20:02:34 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2007-11-15 20:02:34 +0000 |
| commit | 9d43658136f4d77016705d796fa1a99d05ed0339 (patch) | |
| tree | 454ccbf4f47199412565e733e0a9f7b7c4ac5ce3 /sys/arch/i386 | |
| parent | df8447dd7275fa203178fe92b7a94fd03857f8ff (diff) | |
in MP kernels, use smbios to count number of cpus. if > 1 disable apm, so
that acpi can get a chance at controlling the machine.
done with marco, and even tested on the nastiest case: smbios <2.5 w/ HTT
Diffstat (limited to 'sys/arch/i386')
| -rw-r--r-- | sys/arch/i386/i386/bios.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/sys/arch/i386/i386/bios.c b/sys/arch/i386/i386/bios.c index 44d360106c7..2d9ae9d4676 100644 --- a/sys/arch/i386/i386/bios.c +++ b/sys/arch/i386/i386/bios.c @@ -1,4 +1,4 @@ -/* $OpenBSD: bios.c,v 1.71 2007/11/03 05:48:49 ckuethe Exp $ */ +/* $OpenBSD: bios.c,v 1.72 2007/11/15 20:02:33 deraadt Exp $ */ /* * Copyright (c) 1997-2001 Michael Shalayeff @@ -145,7 +145,7 @@ biosattach(struct device *parent, struct device *self, void *aux) struct smbtable bios; volatile u_int8_t *va; char scratch[64], *str; - int flags; + int flags, ncpu = 0; /* remember flags */ flags = sc->sc_dev.dv_cfdata->cf_flags; @@ -282,6 +282,30 @@ biosattach(struct device *parent, struct device *self, void *aux) printf(" date %s", fixstring(scratch)); } smbios_info(sc->sc_dev.dv_xname); + +#ifdef MULTIPROCESSOR + /* count cpus so that we can disable apm when cpu > 1 */ + bzero(&bios, sizeof(bios)); + while (smbios_find_table(SMBIOS_TYPE_PROCESSOR,&bios)) { + struct smbios_cpu *cpu = bios.tblhdr; + + if (cpu->cpu_status & SMBIOS_CPUST_POPULATED) { + /* + * smbios 2.5 added multi code support + */ + if (sh->majrev * 100 + + sh->minrev >= 250 && + cpu->cpu_core_enabled) + ncpu += cpu->cpu_core_enabled; + else { + ncpu++; + if (cpu->cpu_id_edx & CPUID_HTT) + ncpu++; + } + } + } +#endif /* MULTIPROCESSOR */ + break; } } @@ -289,7 +313,7 @@ biosattach(struct device *parent, struct device *self, void *aux) printf("\n"); #if NAPM > 0 - if (apm) { + if (apm && ncpu < 2) { struct bios_attach_args ba; #if defined(DEBUG) || defined(APMDEBUG) printf("apminfo: %x, code %x[%x]/%x[%x], data %x[%x], ept %x\n", |