This can be used in romstage in particular to know if dram is ready.
Change-Id: I0231ab9c0b78a69faa762e0a97378bf0b50eebaf
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38736
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
INVD is called below so if postcar is running in a cached environment
it needs to happen.
NOTE: postcar cannot execute in a cached environment if clflush is not
supported!
Change-Id: I37681ee1f1d2ae5f9dd824b5baf7b23b2883b1dc
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37212
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Xeon-SP Skylake Scalable Processor can have 36 CPU threads (18 cores).
Current coreboot SMM is unable to handle more than ~32 CPU threads.
This patch introduces a version 2 of the SMM module loader which
addresses this problem. Having two versions of the SMM module loader
prevents any issues to current projects. Future Xeon-SP products will
be using this version of the SMM loader. Subsequent patches will
enable board specific functionality for Xeon-SP.
The reason for moving to version 2 is the state save area begins to
encroach upon the SMI handling code when more than 32 CPU threads are
in the system. This can cause system hangs, reboots, etc. The second
change is related to staggered entry points with simple near jumps. In
the current loader, near jumps will not work because the CPU is jumping
within the same code segment. In version 2, "far" address jumps are
necessary therefore protected mode must be enabled first. The SMM
layout and how the CPUs are staggered are documented in the code.
By making the modifications above, this allows the smm module loader to
expand easily as more CPU threads are added.
TEST=build for Tiogapass platform under OCP mainboard. Enable the
following in Kconfig.
select CPU_INTEL_COMMON_SMM
select SOC_INTEL_COMMON_BLOCK_SMM
select SMM_TSEG
select HAVE_SMI_HANDLER
select ACPI_INTEL_HARDWARE_SLEEP_VALUES
Debug console will show all 36 cores relocated. Further tested by
generating SMI's to port 0xb2 using XDP/ITP HW debugger and ensured all
cores entering and exiting SMM properly. In addition, booted to Linux
5.4 kernel and observed no issues during mp init.
Change-Id: I00a23a5f2a46110536c344254868390dbb71854c
Signed-off-by: Rocky Phagura <rphagura@fb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43684
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
The device is a PCIe to eMMC bridge controller to be used in the
Chromebook as the boot disk. The datasheet name is GL9763E and
the revision is 02.
The patch sets single request AXI, disables ASPM L0s and enables SSC.
Signed-off-by: Ben Chuang <benchuanggli@gmail.com>
Change-Id: I158c79f5ac6e559f335b6b50092469c7b1646c56
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43751
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Remove const struct imd *imd and const struct imdr *imdr parameters from
the prototypes of imdr_entry_size(), imd_entry_size() and imd_entry_id()
functions since they are not used anywhere.
Signed-off-by: Anna Karas <aka@semihalf.com>
Change-Id: I6b43e9a5ae1f1d108024b4060a04c57f5d77fb55
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43999
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Many places in coreboot seem to like to do things like
assert(CONFIG(SOME_KCONFIG));
This is somewhat suboptimal since assert() is a runtime check, so you
don't see that this fails until someone actually tries to boot it even
though the compiler is totally aware of it already. We already have the
dead_code() macro to do this better:
if (CONFIG(SOME_KCONFIG))
dead_code();
Rather than fixing all these and trying to carefully educate people
about which type of check is more appropriate in what situation, we can
just employ the magic of __builtin_constant_p() to automatically make
the former statement behave like the latter.
Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I06691b732598eb2a847a17167a1cb92149710916
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44044
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
TEST=Execute "dmidecode -t 4" to check if the processor information is correct for Deltalake platform
Change-Id: I5d075bb297f2e71a2545ab6ad82304a825ed7d19
Signed-off-by: Morgan Jang <Morgan_Jang@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43789
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
The `GetPhysicallyInstalledSystemMemory` API call, at least on Windows
10, returns an error if SMBIOS tables are invalid. Various tools use
this API call and don't operate correctly if this fails. For example,
the "Intel Processor Diagnostic Tool" program is affected.
Windows then guesses the physical memory size by accumulating entries
from the firmware-provided memory map, which results in a total memory
size that is slightly lower than the actual installed memory capacity.
To fix this issue, add the handle to a type 16 entry to all type 17
entries.
Add new fields to struct memory_info and fill them in Intel common code.
Use the introduced variables to fill type 16 in smbios.c and provide
a handle to type 17 entries.
Besides keeping the current behaviour on intel/soc/common platforms, the
type 16 table is also emitted on platforms that don't explicitly fill
it, by using the existing fields of struct memory_info.
Tested on Windows 10:
The GetPhysicallyInstalledSystemMemory API call doesn't return an error
anymore and the installed memory is now being reported as 8192 MiB.
Change-Id: Idc3a363cbc3d0654dafd4176c4f4af9005210f42
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43969
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marcello Sylvester Bauer <sylv@sylv.io>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Fill in the new fields introduced with version 3.0 and install the new
entry point structure identified by _SM3_.
Tested on Linux 5.6 using tianocore as payload:
Still able to decode the tables without errors.
Change-Id: Iba7a54e9de0b315f8072e6fd2880582355132a81
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43719
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This adds the PCI ID of the realtek 5261 PCIe to SD Express card
reader.
BUG=b:161774205
TEST=none
Change-Id: I4d5e6cfca59b02adc74a0c148281a92421fe209d
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43848
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Looks like no one really knows what this bit would be useful for, nor
when it would need to be set. Especially if coreboot is setting it even
on PCI *Express* bridges. Digging through git history, nearly all
instances of setting it on PCIe bridges comes from i82801gx, for which
no reason was given as to why this would be needed. The other instances
in Intel code seem to have been, unsurprisingly, copy-pasted.
Drop all uses of this definition and rename it to avoid confusion. The
negation in the name could trick people into setting this bit again.
Tested on Asrock B85M Pro4, no visible difference.
Change-Id: Ifaff29561769c111fb7897e95dbea842faec5df4
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43775
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Remove the obscure path in source code, where ACPI S3 resume
was prohibited and acpi_resume() would return and continue
to BS_WRITE_TABLES.
The condition when ACPI S3 would be prohibited needs to be
checked early in romstage already. For the time being, there
has been little interest to have CMOS option to disable
ACPI S3 resume feature.
Change-Id: If5105912759427f94f84d46d1a3141aa75cbd6ef
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42498
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This lets code that run in userspace notify coreboot of that fact so
things that can't run in userspace can be excluded.
Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I4da414bc96cfcf0464125eddc6b3f3a7b4506fcf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43784
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
The Kconfig lint tool checks for cases of the code using BOOL type
Kconfig options directly instead of with CONFIG() and will print out
warnings about it. It gets confused by these references in comments
and strings. To fix it so that it can find the real issues, just
update these as we would with real issues.
Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I5c37f0ee103721c97483d07a368c0b813e3f25c0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43824
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Mark the CPU as enabled and the socket as populated.
EDK2 tests these flags before further reading this structure.
Change-Id: Ic545bb47c502cb9d2352ba6d43eaed8c97229c02
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43703
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Implement type 19 by accumulating the DRAM dimm size found in cbmem's
CBMEM_ID_MEMINFO structure. This seems common on x86 where the
address space always starts at 0.
At least EDK2 uses this table in the UI and shows 0 MB DRAM if not
present.
Change-Id: Idee8b8cd0b155e14d62d4c12893ff01878ef3f1c
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43672
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
It's not stricly related to spinlocks. If defined, a better
location should be found and the name collisions with other
barrier() defined in nb/intel solved.
Change-Id: Iae187b5bcc249c2a4bc7bee80d37e34c13d9e63d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43810
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
It's not related to spinlocks and the actual implementation
was also guarded by CONFIG(SMP).
With a single call-site in x86-specific code, empty stubs
for other arch are currently not necessary.
Also drop an unused included on a nearby line.
Change-Id: I00439e9c1d10c943ab5e404f5d687d316768fa16
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43808
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
There are many places where we do this. Put it inside an inline function
for convenience reasons.
Change-Id: I5515a52458b6c78c1a723cb08e6471eb9bac9cd6
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43871
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Michael Niewöhner
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This patch updates Tiger Lake SA DID and report platform. According to
doc #613584, remove PCI_DEVICE_ID_INTEL_TGL_ID_U_1 and add below
definitions of SA ID for TGL-UP4 skus:
TGL-UP4(Y) (4+2): PCI_DEVICE_ID_INTEL_TGL_ID_Y_4_2 0x9A12h
TGL-UP4(Y) (2+2): PCI_DEVICE_ID_INTEL_TGL_ID_Y_2_2 0x9A02h
Change-Id: Id9d9c9ac3bf39582b0da610e6ef912031939c763
Signed-off-by: Derek Huang <derek.huang@intel.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43061
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
When refactoring, one can move code around quite a bit while preserving
reproducibility, unless there is an assert-style macro somewhere... As
these macros use __FILE__ and __LINE__, just moving them is enough to
change the resulting binary, making timeless builds rather useless.
To improve reproducibility, do not use __FILE__ nor __LINE__ inside the
assert-style macros. Instead, use hardcoded values. Plus, mention that
timeless builds lack such information in place of the file name, so that
grepping for the printed string directs one towards this commit. And for
the immutable line number, we can use 404: line number not found :-)
Change-Id: Id42d7121b6864759c042f8e4e438ee77a8ac0b41
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42196
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
All supported x86 chips select HAVE_CF9_RESET, and also use 0xcf9 as
reset register in FADT. How unsurprising. We might as well use that
information to automatically fill in the FADT accordingly. So, do it.
To avoid having x86-specific code under arch-agnostic `acpi/`, create a
new optional `arch_fill_fadt` function, and override it for x86 systems.
Tested on Asus P8Z77-V LX2 with Linux 5.7.6 and Windows 10 at the end of
the patch train, both operating systems are able to boot successfully.
Change-Id: Ib436b04aafd66c3ddfa205b870c1e95afb3e846d
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43389
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
In the initial DPTF refactor, the scope of the TCPU device was
incorrectly set as \_SB, instead of \_SB.PCI0. However, because of the
way that the acpi_inject_dsdt() callback currently works (it injects
contents before the dsdt.aml file), the Scope where the TCPU
device lives (\_SB.PCI0) doesn't exist yet. Therefore, to avoid playing
games with *when* things are defined in the DSDT, switch to defining all
of the DPTF devices in the SSDT.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Ia4922b4dc6544d79d44d39e6ad18c6ab9fee0fd7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43529
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This change increases the maximum length of device path string to 40
characters to accommodate growing hierarchy of devices.
TEST=Ensured that "\_SB.PCI0.LPCB.EC0.CREC.TUN0.RT58" is correctly
added to SSDT.
Change-Id: Id2ef71a32b26e366b56c652942a247de4889544a
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43540
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This PCI ID is required in order for JSL devices to perform SSDT
generation for DPTF.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I42209d15bc4f1654814465ce1412576f7349dddc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43421
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Add new IGD device ID for new Tigerlake SKU support.
BUG=b:160394260
Branch=None
TEST=build, boot and check IGD device is reported.
Signed-off-by: Ravi Sarawadi <ravishankar.sarawadi@intel.com>
Change-Id: I1903d513b61655d0e939f80b0fd0108091fdd7e9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43163
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Wonkyu Kim <wonkyu.kim@intel.com>
There is some boilerplate required to iterate over the USB supported
protocol structs. Encapsulate all the in a method to make the callers
simpler.
BUG=b:154756391
TEST=Built test trembyle.
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I401f10d242638b0000ba697573856d765333dca0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43352
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Code has evolved such that there seems to be little
use for global definition of cbmem_top_chipset().
Even for AMD we had three different implementations.
Change-Id: I44805aa49eab526b940e57bd51cd1d9ae0377b4b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43326
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
ACPI names can only be 4 characters long. Define a constant that defines
the size of the name + the NUL terminator.
BUG=b:154756391
TEST=none
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Iad230c029f324005620ddad66c433ada26be78cc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43329
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This code is not even being build-tested. Drop it before it grows moss.
Change-Id: I216f8459afc69ced98ea1859ee6b1f8e4d43bc4a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43248
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner
The SMM_LOCK bit isn't in SMM_MASK_MSR, but in HWCR_MSR, so move it
there. The soc/amd/* code itself uses the bit definition when accessing
HWCR_MSR, so SMM_LOCK was just below the wrong MSR definition.
Also remove SMM_LOCK from comment about masking bits in SMM_MASK_MSR,
since that bit isn't in that MSR.
TEST=Checked the code and the corresponding BKDG/PPR.
Change-Id: I2df446f5a9e11e1e7c8d10256f3c2803b18f9088
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43309
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
A fairly common thing in ACPI is notifying a device when some kind of
device-specific event happens; this function simplifies writing this
pattern.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I0f18db9cc836ec9249604452f03ed9b4c6478827
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42102
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Intel Dynamic Tuning Technology is the name of a PCI device on some
Intel SoCs. This minimal PCI driver is only used now for SSDT generation
on TGL devices.
Change-Id: Ib52f35e4e020ca3e6ab8b32cc3bf7df36041926e
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41893
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Specify how hexstrtobin.c processes the strings of odd length.
Signed-off-by: Anna Karas <aka@semihalf.com>
Change-Id: Ie8cd8fb93d7dab08c5e7f28fc511b6381f5ad13a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43089
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
\_SB.DPTF.IDSP adverties to the DPTF daemon which policies the
implementation supports. Added a new acpigen function to figure out
which policies are used, and fills out IDSP appropriately.
Change-Id: Idf67a23bf38de4481c02f98ffb27afb8ca2d1b7b
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42081
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
DPTF has several options on how to control the fan (fine-grained speed
control, minimum speed change in percentage points, and whether or not
the DPTF device should notify the Fan if it detects low speed).
Individual TSRs can also set GTSH, which is the amount of hysteresis
inherent in the measurement, either from circuitry (if analog), or in
firmware (if digital).
BUG=b:143539650
TEST=compiles
Change-Id: I42d789d877da28c163e394d7de5fb1ff339264eb
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41891
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This change adds support for emitting the PPCC table, which describes
the ranges available as knobs for DPTF to tune. It can support min/max
power, min/max time window for averaging, and the minimum adjustment size
(granularity or step size) of each power limit. The current implementation
only supports PL1 and PL2.
BUG=b:143539650
TEST=compiles
Change-Id: I67e80d661ea5bb79980ef285eca40c9a4b0f1849
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41890
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Elyes HAOUAS