enable the rdmsr call in msr_write_ipi(), so that when it's not
defined we don't read it before writing; disabled in powernow_k8
and enabled in the others.
powernow_k8 driver (much better than undeffing and write it again).
* Fix the WRITE_FIDVID macro, I changed it to use the third argument
for the bitmask, but it's not correct.
Last change should fix the problem reported by FUKUMOTO Atsushi.
Modulation.
This works by changing the duty cycle of the clock modulation,
and saves power and helps to not increase the temperature by
software.
Adapted from OpenBSD/FreeBSD's p4tcc.
To enable it one must use "options INTEL_ONDEMAND_CLOCKMOD".
Tested by me in UP and SMP, ok'ed by Matthew R. Green.
in all CPUs available in the system. This adds another member
to struct cpu_info, ci_msr_rvalue; it will contain the value of the MSR
in a previous operation.
Tested with clockmod in UP and SMP by me, tested with est in SMP
by Daniel Carosone and Michael Van Elst.
Ok'ed by Andrew Doran and Matthew R. Green.
Minor modifications by me:
-use an mi device major number
-(coarsly) divided into pci card specific and less specific parts, moved
the latter to dev/drm
-renamed autoconf attributes to reflect this
Todo:
-adapt all card frontends but i915 to drm include file location
-review the mtrr change
-make the change to agp_i810.c coexist with the fix for buggy VESA
BIOSes which is commented out temporarily
-RCS IDs etc style stuff
-LKM support (rescan support for vga)
-test
Just run it once (in the first cpu probed) with the RUN_ONCE(9)
framework.
Change the argument of est_init and k8_powernow_init to void, we don't
need cpu_info * anymore.
Suggested by tls@ and mrg@.
(Thermal Monitor).
This driver will throttle the CPU clock modulation, saving some
power, also known as ODMC (On Demand Modulation Clock).
The processor can change from 12.5% to 100% (there are two erratas,
so two levels might be skipped in the worst case).
If supported, you'll see the following sysctl sub-tree:
machdep.p4tcc.throttling.target: CPU Clock throttling state (0 = lowest, 7 highest)
machdep.p4tcc.throttling.current: current CPU throttling state
machdep.p4tcc.throttling.available: list of CPU Clock throttling states
machdep.p4tcc.throttling.target = 2
machdep.p4tcc.throttling.current = 2
machdep.p4tcc.throttling.available = 7 6 5 4 3 2
Adapted from OpenBSD/FreeBSD.
Seperate "cpubus" and "ioapicbus" -- while they share a common "address
space" (the apic id), the kernel doesn't use this fact. There are different
data passed to cpus and apics, which caused some ugly polymorphism. This
also saves the special "submatch" functions needed to distingush cpus
and ioapics for autoconf. (And it makes that "apid" locators wired
in the kernel configuration are honored now; this allows one to dumb down
an mp box to singleprocessor by userconfig.)
Print "apid" locators in the buses "print" function "as everyone does",
so the per-port cpu drivers don't need to do it.
Being here, constify "struct cpu_functions" and g/c the unused MP_PICMODE
flag.
int _bus_dmatag_subregion(bus_dma_tag_t tag,
bus_addr_t min_addr,
bus_addr_t max_addr,
bus_dma_tag_t *newtag,
int flags)
void _bus_dmatag_destroy(bus_dma_tag_t tag)
that allow a (normally broken/limited) device to restrict the bus address
range it can talk to. this is used by bce(4) to limit DMA addresses to
1GB range, the maximum the chip can address.
all this is from Yorick Hardy <yhardy@uj.ac.za> with input from several
people on tech-kern.
XXX: bus_dma(9) needs an update still.
C5P and later cores (also known as 'ACE', which is part of the VIA PadLock
security engine). Ported from OpenBSD.
Reviewed on tech-crypto and port-i386, no objections to commiting this.
