Commit Graph

2347 Commits

Author SHA1 Message Date
Manish V Badarkhe 0aa0b3afd6 refactor(measured-boot): avoid Measured-Boot dependency on Trusted-Boot
Measured-Boot and Trusted-Boot are orthogonal to each other and hence
removed dependency of Trusted-Boot on Measured-Boot by making below
changes -
1. BL1 and BL2 main functions are used for initializing Crypto module
   instead of the authentication module
2. Updated Crypto module registration macro for MEASURED_BOOT with only
   necessary callbacks for calculating image hashes
3. The 'load_auth_image' function is now used for the image measurement
   during Trusted or Non-Trusted Boot flow

Change-Id: I3570e80bae8ce8f5b58d84bd955aa43e925d9fff
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
2022-01-11 23:06:22 +00:00
Nicolas Le Bayon 63d2159846 refactor(st-ddr): move basic tests in a dedicated file
These basic tests are generic and should be used independently of the
driver, depending on the plaftorm characteristics.

Change-Id: I38161b659ef2a23fd30a56e1c9b1bd98461a2fe4
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@foss.st.com>
2022-01-05 11:47:46 +01:00
Nicolas Le Bayon 06e55dc842 refactor(st-ddr): reorganize generic and specific elements
stm32mp_ddrctl structure contains DDRCTRL registers definitions.
stm32mp_ddr_info contains general DDR information extracted from DT.
stm32mp_ddr_size moves to the generic side.
stm32mp1_ddr_priv contains platform private data.

stm32mp_ddr_dt_get_info() and stm32mp_ddr_dt_get_param() allow to
retrieve data from DT. They are located in new generic c/h files in
which stm32mp_ddr_param structure is declared. Platform makefile
is updated.

Adapt driver with this new classification.

Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Change-Id: I4187376c9fff1a30e7a94407d188391547107997
2022-01-05 11:09:59 +01:00
Yann Gautier 88f4fb8fa7 feat(stm32mp1): allow configuration of DDR AXI ports number
A new flag STM32MP_DDR_DUAL_AXI_PORT is added, and enabled by default.
It will allow choosing single or dual AXI ports for DDR.

Change-Id: I48826a66a6f4d18df87e081c0960af89ddda1b9d
Signed-off-by: Yann Gautier <yann.gautier@st.com>
2022-01-05 11:09:59 +01:00
Nicolas Le Bayon 5def13eb01 feat(st-ddr): add read valid training support
Add the read data eye training = training for optimal read valid placement
(RVTRN) when the built-in calibration is executed for LPDDR2 and LPDDR3.

Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Change-Id: I7ac1c77c21ebc30315b532741f2f255c2312d5b2
2022-01-05 11:09:59 +01:00
Patrick Delaunay 26cf5cf6d6 refactor(stm32mp1): remove the support of calibration result
The support of a predefined DDR PHY tuning result is removed for
STM32MP1 driver because it is not needed at the supported frequency
when built-in calibration is executed.

The calibration parameters were provided in the device tree by the
optional node "st,phy-cal", activated in ddr helper file by the
compilation flag DDR_PHY_CAL_SKIP and filled with values generated
by CubeMX.

This patch
- updates the binding file to remove "st,phy-cal" support
- updates the device trees and remove the associated defines
- simplifies the STM32MP1 DDR driver and remove the support of
  the optional "st,phy-cal"

After this patch the built-in calibration is always executed.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Change-Id: I3fc445520c259f7f05730aefc25e64b328bf7159
2022-01-05 11:09:59 +01:00
Jona Stubbe 9565962c37 refactor(plat/rockchip/rk3399/drivers/gpio): reduce code duplication
Refactor the GPIO code to use a small lookup table instead of redundant or
repetitive code.

Signed-off-by: Jona Stubbe <tf-a@jona-stubbe.de>
Change-Id: Icf60385095efc1f506e4215d497b60f90e16edfd
Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com>
2022-01-04 15:26:43 +01:00
André Przywara e752fa4a4c Merge "feat(allwinner): allow to skip PMIC regulator setup" into integration 2022-01-01 02:16:14 +01:00
Andre Przywara 67412e4d7a feat(allwinner): allow to skip PMIC regulator setup
For somewhat historical reasons we are doing some initial PMIC regulator
setup in BL31, as U-Boot does not (yet) have a PMIC driver. This worked
fine so far, but there is at least one board (OrangePi 3) that gets upset,
because the Ethernet PHY needs some *coordinated* bringup of *two*
regulators.

To avoid custom hacks, let's introduce a build option to keep doing the
regulator setup in TF-A. Defining SUNXI_SETUP_REGULATORS to 0 will break
support for some devices on some boards in U-Boot (Ethernet and HDMI),
but will allow to bring up the OrangePi 3 in Linux correctly. We keep
the default at 1 to not change the behaviour for all other boards.

After U-Boot gained proper PMIC support at some point in the future, we
will probably change the default to 0, to get rid of the less optimal
PMIC code in TF-A.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Change-Id: Ie8e2583d0396f6eeaae8ffe6b6190f27db63e2a7
2021-12-27 15:32:22 +00:00
Joanna Farley a006606f3c Merge "feat(ccidx): update the do_dcsw_op function to support FEAT_CCIDX" into integration 2021-12-24 11:26:32 +01:00
Madhukar Pappireddy 93b153b5bf Merge changes from topic "st_regulator" into integration
* changes:
  feat(st-sdmmc2): manage cards power cycle
  feat(stm32mp1): register fixed regulator
  feat(st-drivers): introduce fixed regulator driver
  refactor(st): update CPU and VDD voltage get
  refactor(stm32mp1-fdts): update regulator description
  refactor(st-pmic): use regulator framework for DDR init
  feat(st-pmic): register the PMIC to regulator framework
  refactor(st-pmic): split initialize_pmic()
  feat(stm32mp1): add regulator framework compilation
  feat(regulator): add a regulator framework
  feat(stpmic1): add new services
  feat(stpmic1): add USB OTG regulators
  refactor(st-pmic): improve driver usage
  refactor(stpmic1): set stpmic1_is_regulator_enabled() as boolean
  refactor(stm32mp1): re-order drivers init
2021-12-24 00:13:50 +01:00
Madhukar Pappireddy 0ca4b4b79e Merge changes from topic "clock_framework" into integration
* changes:
  feat(st): use newly introduced clock framework
  feat(clk): add a minimal clock framework
2021-12-22 19:17:57 +01:00
Yann Gautier 258bef913a feat(st-sdmmc2): manage cards power cycle
To correctly initialize the MMC devices, a power cycle is required.
For this we need to:
- disable vmmc-supply regulator
- make the power cycle required for SDMMC2 peripheral
- enable regulators

Change-Id: I2be6d9082d1cc4c864a82cf2c31ff8522e2d31a2
Signed-off-by: Yann Gautier <yann.gautier@st.com>
2021-12-22 14:04:32 +01:00
Pascal Paillet 5d6a2646f7 feat(st-drivers): introduce fixed regulator driver
Fixed regulator is mainly used when no pmic is available

Change-Id: Ib6a998684bcb055ba95a093bee563372d9051474
Signed-off-by: Pascal Paillet <p.paillet@st.com>
2021-12-22 14:04:32 +01:00
Yann Gautier 85fb175b5e feat(st-pmic): register the PMIC to regulator framework
Register the PMIC to the regulator framework.

Change-Id: Ic825a8ef08505316db3dbd5944d62ea907f73c4a
Signed-off-by: Pascal Paillet <p.paillet@st.com>
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
2021-12-22 14:04:32 +01:00
Nicolas Le Bayon ae7792e058 refactor(st-pmic): split initialize_pmic()
print_pmic_info_and_debug() prints the PMIC version ID and displays
regulator information if debug is enabled.
It is under DEBUG flag and called after initialize_pmic() in BL2.

Change-Id: Ib81a625740b7ec6abb49cfca05e44c69efaa4718
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
2021-12-22 14:04:32 +01:00
Pascal Paillet d5b4a2c4e7 feat(regulator): add a regulator framework
Add a regulator framework to:
- provide an interface to consumers and drivers,
- connect consumers with drivers,
- handle most of devicetree-parsing,
- handle always-on and boot-on regulators,
- handle min/max voltages,

Change-Id: I23c939fdef2c71a416c44c9de332f70db0d2aa53
Signed-off-by: Pascal Paillet <p.paillet@st.com>
2021-12-22 14:04:32 +01:00
Pascal Paillet ea552bf5a5 feat(stpmic1): add new services
Add support for ICC, sink mode, bypass mode,
active discharge and list voltages.
Handle LDO3 sink source mode in a different way to avoid
setting voltage while in sink source mode.

Change-Id: Ib1b909fd8a153f542917f650e43e24317a570534
Signed-off-by: Pascal Paillet <p.paillet@st.com>
2021-12-22 14:04:32 +01:00
Etienne Carriere 13fbfe046e feat(stpmic1): add USB OTG regulators
Add regulators boost, pwr_sw1 and pwr_sw2 regulators related to
USB OTG supply BOOST, SW_OTG and SWIN/SWOUT. These regulators are
needed since manipulated during the suspend/resume power sequence
as per FDT description for stm32mp15x-xxx boards from
STMicroelectronics.

Change-Id: I6217de707e49882bd5a9100db43e0d354908800d
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
2021-12-22 14:04:32 +01:00
Nicolas Le Bayon 16e56a75de refactor(stpmic1): set stpmic1_is_regulator_enabled() as boolean
Improve use and readability.

Change-Id: Ia99fc38287f36c9dd12bfe51352afa5da68c0e47
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
2021-12-22 14:04:32 +01:00
Gabriel Fernandez 847c6bc8e6 feat(clk): add a minimal clock framework
This is mainly a clock interface with clk_ops callbacks.
Those callbacks are: enable, disable, get_rate, set_parent,
and is_enabled.
This framework is compiled for STM32MP1.

Change-Id: I5119a2aeaf103ceaae7a60d9e423caf0c148d794
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
2021-12-22 13:07:23 +01:00
johpow01 e16045de50 fix(errata): workaround for Cortex X2 erratum 2058056
Cortex X2 erratum 2058056 is a Cat B erratum present in the X2 core.
It applies to revisions r0p0, r1p0, and r2p0 and is still open.

There are 2 ways this workaround can be accomplished, the first of
which involves executing a few additional instructions around MSR
writes to CPUECTLR when disabling the prefetcher. (see SDEN for
details)

However, this patch implements the 2nd possible workaround which sets
the prefetcher into its most conservative mode, since this workaround
is generic.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN1775100

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: Idb20d9928c986616cd5bedf40bb29d46d384cfd3
2021-12-21 11:52:26 -06:00
johpow01 1db6cd6027 fix(errata): workaround for Cortex X2 erratum 2083908
Cortex X2 erratum 2083908 is a Cat B erratum present in the Cortex
X2 core. It applies to revision r2p0 and is still open.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN1775100

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: Id9dca2b042bf48e75fb3013ab37d1c5925824728
2021-12-16 23:22:27 +01:00
Madhukar Pappireddy 7468be1274 Merge changes from topic "fconf_get_index" into integration
* changes:
  feat(stm32mp1): skip TOS_FW_CONFIG if not in FIP
  feat(fconf): add a helper to get image index
2021-12-14 20:58:09 +01:00
johpow01 d0ec1cc437 feat(ccidx): update the do_dcsw_op function to support FEAT_CCIDX
FEAT_CCIDX modifies the register fields in CCSIDR/CCSIDR2 (aarch32)
and CCSIDR_EL1 (aarch64). This patch adds a check to the do_dcsw_op
function to use the right register format rather than assuming
that FEAT_CCIDX is not implemented.

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I12cd00cd7b5889525d4d2750281a751dd74ef5dc
2021-12-14 12:48:08 -06:00
Yann Gautier 737ad29bf9 feat(stm32_gpio): add a function to reset a pin
Add set_gpio_reset_cfg() to set a pin in its reset configuration:
analog, no-pull, speed low, and its secure configuration, thanks to
stm32_gpio_is_secure_at_reset().

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: I7b73c3636859f97fcc57f81cf68b42efc727922e
2021-12-14 09:25:19 +01:00
Yann Gautier 9e3f409398 feat(fconf): add a helper to get image index
A new function dyn_cfg_dtb_info_get_index() is created to get the index
of the given image config_id in the dtb_infos pool.
This allows checking if an image with a specific ID is in the FIP.

Change-Id: Ib300ed08e5b8a683dc7980a90221c305fb3f457d
Signed-off-by: Yann Gautier <yann.gautier@st.com>
2021-12-13 17:37:53 +01:00
Manish Pandey a5645148a6 Merge changes from topic "jc/AMUv1" into integration
* changes:
  docs(build-options): add build macros for features FGT,AMUv1 and ECV
  fix(amu): fault handling on EL2 context switch
2021-12-13 13:52:37 +01:00
Manish Pandey c6b2919834 Merge changes from topic "mb_critical_data" into integration
* changes:
  docs(measured-boot): add a platform function for critical data
  feat(fvp): measure critical data
2021-12-10 14:37:06 +01:00
Jayanth Dodderi Chidanand f74cb0be8a fix(amu): fault handling on EL2 context switch
The HAFGRTR_EL2 register is UNDEFINED unless the CPU supports both
FEAT_FGT and FEAT_AMUv1. FEAT_FGT is mandatory for v8.6-A and upwards,
but FEAT_AMUv1 is optional (from v8.4-A upwards), and as such any
8.6-A cores today without support for FEAT_AMUv1 will trigger an
undefined instruction exception on accessing this register.

Currently ARM_ARCH_AT_LEAST macro has been used to associate with an
architecture extension allowing to access HAFGRTR_EL2 register. This
condition should be replaced with macros specific to individual
features. This patch adds a new set of macros "ENABLE_FEAT_FGT,
ENABLE_FEAT_AMUv1, ENABLE_FEAT_ECV" under build options to provide
controlled access to the HAFGRTR_EL2 register.

Further to ensure that the the build options passed comply
with the given hardware implementation, a feature detection mechanism,
checking whether build options match with the architecture is required
at bootime. This will be implemented and pushed later in a separate
patch.

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: Ie390f4babe233b8b09455290277edbddecd33ead
2021-12-10 12:33:51 +00:00
Alexei Fedorov b09b150add Merge "fix(rmmd): align RMI and GTSI FIDs with SMCCC" into integration 2021-12-10 12:20:36 +01:00
Manish V Badarkhe cf21064ec8 feat(fvp): measure critical data
Implemented a platform function 'plat_mboot_measure_critical_data' to
measure critical data and record its measurement using the Event Log
driver.
'bl2_plat_mboot_finish' function invokes this platform function
immediately after populating the critical data.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ia198295c6e07ab26d436eab1ff90df2cf28303af
2021-12-08 13:08:17 +00:00
Manish V Badarkhe 14db963fd3 refactor(measured-boot): add generic macros for using Crypto library
It doesn't look correct to use mbed TLS defines directly in the Event
Log driver as this driver may use another Crypto library in future.
Hence mbed TLS Crypto dependency on Event Log driver is removed by
introducing generic Crypto defines and uses those in the Event Log
driver to call Crypto functions.
Also, updated mbed TLS glue layer to map these generic Crypto defines
to mbed TLS library defines.

Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ibc9c751f60cbce4d3f3cf049b7c53b3d05cc6735
2021-12-08 11:00:13 +00:00
Subhasish Ghosh b9fd2d3ce3 fix(rmmd): align RMI and GTSI FIDs with SMCCC
This patch allocates the RMI and GTSI FIDs from the reserved
range in Standard Secure Service call range of SMCCC.

Signed-off-by: Subhasish Ghosh <subhasish.ghosh@arm.com>
Change-Id: I82e77778882194c2a78ca6340788d53bab7c3a50
2021-12-08 10:15:21 +00:00
Sandrine Bailleux 0628fe3fff Merge "refactor(measured boot): rename a macro INVALID_ID to EVLOG_INVALID_ID" into integration 2021-12-08 08:16:53 +01:00
Nicolas Le Bayon 165ad5561e feat(drivers/st/uart): add uart driver for STM32MP1
Add a UART/USART driver for STM32 with complete a hardware support;
it used for STM32CubeProgrammer support with even parity.

This driver is not used for console, which is already handle
by a simple driver (drivers/st/uart/aarch32/stm32_console.S).

Change-Id: Ia9266e5d177fe7fd09c8a15b81da1a05b1bc8b2d
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
2021-12-03 09:26:11 +01:00
Pali Rohár 0ee80f35a2 fix(plat/marvell/a3720/uart): do external reset during initialization
Sometimes when changing UART clock from TBG to XTAL, UART HW enters into
some broken state. It does not transit characters from TX FIFO anymore
and TX FIFO stays always empty. TX FIFO reset does not recover UART HW
from this broken state.

Experiments show that external reset can fix UART HW from this broken
state.

TF-A fatal error handler calls console_a3700_core_init() function to
initialize UART HW. This handler may be called anytime during CPU
runtime, also when kernel is running.

U-Boot or Linux kernel may change UART clock to TBG to achieve higher
baudrates. During initialization, console_a3700_core_init() resets UART
configuration to default settings, which means that it also changes
UART clock from TBG to XTAL.

Do an external reset of UART via North Bridge Peripheral reset register
to prevent this UART hangup.

Signed-off-by: Pali Rohár <pali@kernel.org>
Change-Id: I8990bce24d1a6fd8ccc47a2cd0a5ff932fcfcf14
2021-12-02 17:38:02 +01:00
Manish V Badarkhe 426a111965 refactor(measured boot): rename a macro INVALID_ID to EVLOG_INVALID_ID
Renamed a macro 'INVALID_ID' to 'EVLOG_INVALID_ID' to avoid its clash
with other macro names and to show it is explicitly used for Event
Log driver.

Change-Id: Ie4c92b3cd1366d9a59cd6f43221e24734865f427
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
2021-11-23 15:29:09 +01:00
johpow01 dc78e62d80 feat(sme): enable SME functionality
This patch adds two new compile time options to enable SME in TF-A:
ENABLE_SME_FOR_NS and ENABLE_SME_FOR_SWD for use in non-secure and
secure worlds respectively. Setting ENABLE_SME_FOR_NS=1 will enable
SME for non-secure worlds and trap SME, SVE, and FPU/SIMD instructions
in secure context. Setting ENABLE_SME_FOR_SWD=1 will disable these
traps, but support for SME context management does not yet exist in
SPM so building with SPD=spmd will fail.

The existing ENABLE_SVE_FOR_NS and ENABLE_SVE_FOR_SWD options cannot
be used with SME as it is a superset of SVE and will enable SVE and
FPU/SIMD along with SME.

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: Iaaac9d22fe37b4a92315207891da848a8fd0ed73
2021-11-12 10:38:00 -06:00
Mark Dykes a706524417 Merge "Changing SMC code for transitioning Granule" into integration 2021-11-09 21:13:39 +01:00
Olivier Deprez a127b99d5a Merge "feat(SPMD): route secure interrupts to SPMC" into integration 2021-11-09 11:57:30 +01:00
Madhukar Pappireddy 2e43638e95 Merge changes from topic "st_usb" into integration
* changes:
  fix(drivers/usb): add a optional ops get_other_speed_config_desc
  fix(drivers/usb): remove unnecessary cast
2021-11-09 06:03:32 +01:00
Manish Pandey 28623c102d Merge "fix: libc: use long for 64-bit types on aarch64" into integration 2021-11-08 21:34:42 +01:00
Mark Dykes 51d8d1e326 Changing SMC code for transitioning Granule
Changing the SMC code value to conform with RMM for
transitioning a realm granule back to non-secure,
otherwise known as undelegate.

Signed-off-by: Mark Dykes <mark.dykes@arm.com>
Change-Id: Ia45ad6cab538de48c65b071b49e504be234afa2b
2021-11-08 10:43:40 -06:00
Scott Branden 4ce3e99a33 fix: libc: use long for 64-bit types on aarch64
Use long instead of long long on aarch64 for 64_t stdint types.
Introduce inttypes.h to properly support printf format specifiers for
fixed width types for such change.

Change-Id: I0bca594687a996fde0a9702d7a383055b99f10a1
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
2021-11-08 14:41:17 +00:00
Madhukar Pappireddy 0b5e33c7aa Merge changes Ic2f90d79,Ieca02425,I615bcc1f,I6a9cb4a2,I5247f8f8, ... into integration
* changes:
  fix(errata): workaround for Neoverse V1 erratum 2216392
  fix(errata): workaround for Cortex A78 erratum 2242635
  fix(errata): workaround for Neoverse-N2 erratum 2280757
  fix(errata): workaround for Neoverse-N2 erratum 2242400
  fix(errata): workaround for Neoverse-N2 erratum 2138958
  fix(errata): workaround for Neoverse-N2 erratum 2242415
2021-11-08 15:28:19 +01:00
Patrick Delaunay 216c1223c2 fix(drivers/usb): add a optional ops get_other_speed_config_desc
Correctly handle USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION request
in USB driver and support a different result than
USB_DESC_TYPE_CONFIGURATION with the new optional ops
get_other_speed_config_desc().

The support of this descriptor is optionnal and is only
required when high-speed capable device which can operate at its
other possible speed.

This patch allows to remove the pbuf update in usb_core_get_desc()
and solves an issue on USB re-enumeration on STM32MP15 platform
as the result of get_config_desc() is a const array.
This issue is not see on normal use-case, as the USB enumeration
is only done in ROM code and TF-A reuse the same USB descritors.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Change-Id: I8edcc1e45065ab4e45d48f4bc37b49120674fdb0
2021-11-05 11:28:59 +02:00
nayanpatel-arm 603806d137 fix(errata): workaround for Neoverse-N2 erratum 2242400
Neoverse-N2 erratum 2242400 is a Cat B erratum that applies to
revision r0p0 of CPU. It is still open. The workaround
is to set CPUACTLR5_EL1[17] to 1'b1 followed by setting few
system control registers to specific values as per attached
SDEN document.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN1982442/latest

Signed-off-by: nayanpatel-arm <nayankumar.patel@arm.com>
Change-Id: I6a9cb4a23238b8b511802a1ee9fcc5b207137649
2021-11-04 12:51:26 -07:00
nayanpatel-arm c948185c97 fix(errata): workaround for Neoverse-N2 erratum 2138958
Neoverse-N2 erratum 2138958 is a Cat B erratum that applies to
revision r0p0 of CPU. It is still open. The workaround
is to set CPUACTLR5_EL1[13] to 1'b1.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN1982442/latest

Signed-off-by: nayanpatel-arm <nayankumar.patel@arm.com>
Change-Id: I5247f8f8eef08d38c169aad6d2c5501ac387c720
2021-11-04 20:30:19 +01:00
nayanpatel-arm 5819e23bc4 fix(errata): workaround for Neoverse-N2 erratum 2242415
Neoverse-N2 erratum 2242415 is a Cat B erratum that applies to
revision r0p0 of CPU. It is still open. The workaround
is to set CPUACTLR_EL1[22] to 1'b1. Setting CPUACTLR_EL1[22]
will cause CFP instruction to invalidate all branch predictor
resources regardless of context.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN1982442/latest

Signed-off-by: nayanpatel-arm <nayankumar.patel@arm.com>
Change-Id: I442be81fbc32e21fed51a84f59584df17f845e96
2021-11-04 12:13:22 -07:00