interacts with interrupts, query ACPI and use MWAIT for entrance into
Cx sleep states. Support C1 "I/O then halt" mode. See Intel'
document 302223-007 "Intelб╝ Processor Vendor-Specific ACPI Interface
Specification" for description.
Move the acpi_cpu_c1() function into x86/cpu_machdep.c and use
it instead of inlining "sti; hlt" sequence in several places.
In the acpi(4) man page, besides documenting the dev.cpu.N.cx_methods
sysctl, correct the names for dev.cpu.N.{cx_usage,cx_lowest,cx_supported}
sysctls.
Both jkim and avg have some other patches implementing the mwait
functionality; this work is unrelated. Linux does not rely on the
ACPI to provide correct tables describing Cx modes. Instead, the
driver has pre-defined knowledge of the CPU models, it was supplied by
Intel.
Tested by: pho (previous versions)
Sponsored by: The FreeBSD Foundation
shows no difference with the code removed.
On both amd64 and i386, assert that a released pmap is not active.
Proposed and reviewed by: alc
Discussed with: Svatopluk Kraus <onwahe@gmail.com>, peter
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Split a portion of the code in madt_parse_interrupt_override to a
separate function, that is public and can be used from other code.
This will be needed by the Xen port, since FreeBSD needs to parse the
interrupt overrides and notify Xen about them.
This commit should not introduce any functional change.
Sponsored by: Citrix Systems R&D
Reviewed by: jhb, gibbs
x86/acpica/madt.c:
- Introduce madt_parse_interrupt_values() that parses the intr
information from ACPI and returns the triggering and the polarity.
This is a subset of the functionality that used to be part of
madt_parse_interrupt_override().
- Make madt_found_sci_override a global variable that can be used
from other files.
x86/include/acpica_machdep.h:
- Prototype of madt_parse_interrupt_values.
- Extern declaration of madt_found_sci_override.
