u-boot.git/arch/arm/cpu, branch master

Merge patch series "Fix speculative access to firewalled regions on AM62 SoCs"

2026-05-25T15:29:54+00:00

Anshul Dalal  says:

This patch series fixes firewall exceptions observed on AM62 family of
devices due to speculative accesses made by the A53 core to secure DDR
regions.

Link: https://lore.kernel.org/r/20260520-am62_firewall_exception_fix-v3-0-9ca3dc40aea4@ti.com

arm: armv8: mmu: move mmu enablement out of mmu_setup

2026-05-25T15:29:50+00:00

Currently mmu_setup for ARMv8 performs two functions, first it sets up
the page tables based the memory map provided by the board and then it
enables the MMU.

However for some platforms runtime fixes to the generated page tables
are required before the MMU can be enabled, such as K3 family of SoCs.

Therefore this patch moves the enablement of the MMU out of mmu_setup
and to a standalone mmu_enable function to give more granular control to
the platforms.

Note that no functional changes are intended from this patch.

Reviewed-by: Ilias Apalodimas 
Signed-off-by: Anshul Dalal

board: nxp: lx2160a: without QIXIS, MC-ENET, PCI, LTC3882

2026-05-15T11:28:31+00:00

The shared LX2160A board file calls helpers that only exist when
their subsystem is enabled. Gate them on the matching CONFIG_*:
 - pci_init() under CONFIG_PCI.
 - fdt_fixup_mc_ddr() and fsl_rgmii_init() under CONFIG_FSL_MC_ENET.
 - qixis_*() and the QIXIS branch of checkboard() under
   CONFIG_FSL_QIXIS; cpu_name(buf) moves out so the non-QIXIS path
   still prints "Board: ".
 - EVENT_SPY_SIMPLE on init_func_vid moves inside the
   CONFIG_VOL_MONITOR_LTC3882_READ guard (was outside, dangling
   symbol when LTC3882 off).

 #if / #ifdef, not IS_ENABLED(), because the helpers are themselves
conditionally compiled.

While here, lx2160a_common.h: fix BOOT_TARGET_DEVICES_MMC
1 arg vs 2 args and gate the MMC target on CONFIG_CMD_MMC,
not CONFIG_MMC.

No functional change for NXP boards: LX2160ARDB, LX2160AQDS, or
LX2162AQDS, but mainly build clean up in order to support
other NXP lx2160a boards without those HW dependencies.

Signed-off-by: Vincent Jardin 
Signed-off-by: Peng Fan

arm: layerscape: Check zero size memory bank before lmb_add

2026-05-06T02:29:33+00:00

In layerspace's lmb_arch_add_memory implementation, all memory bank
are added to lmb, even some is with zero size. This will cause lmb
treating it as overlap with available memory by lmb_addrs_overlap
and merge with available memory. Finally causing available memory
start address changed to 0.

For example, on LX2160, before zero memory bank added to lmb, there
are two available memory regions:
  - region 0, start 0x80000000, size 0x7be00000
  - region 1, start 0x2080000000, size 0x700000000
After zero size memory bank added, merge to one region:
  - region 0, start 0, size 0x2780000000
This wrong new region causes efi_memory_init issue when allocating bounce
buffer because of conflict address (with uboot reserved) is allocated.

Signed-off-by: Ye Li 
Reviewed-by: Peng Fan 
Signed-off-by: Peng Fan

arm: psci: Add API to check for support of specific PSCI function

2026-04-27T10:38:44+00:00

Add an API to check if a specific PSCI function is supported or not.
This is based on the psci_features() function present in Linux kernel
(drivers/firmware/psci/psci.c).

Reviewed-by: Casey Connolly 
Reviewed-by: Sumit Garg 
Signed-off-by: Varadarajan Narayanan 
Link: https://patch.msgid.link/20260121063920.1500293-2-varadarajan.narayanan@oss.qualcomm.com
Signed-off-by: Casey Connolly

arm: Add ARMv8-M aarch32 support

2026-04-13T23:34:02+00:00

Add configuration for ARMv8-M aarch32 core, which are currently
Cortex-M23/M33 cores. These cores are treated similar to ARMv7-M
cores, except the code has to be compiled with matching compiler
-march=armv8-m.main flag . These cores have no MMU, they have MPU,
which is currently not configured.

Unlike ARMv7-M, these cores have 512 interrupt vectors. While the
SYS_ARM_ARCH should be set to 8, it is set to 7 because all of the
initialization code is built from arch/arm/cpu/armv7m and not armv8.
Furthermore, CONFIG_ARM64 must be disabled, although DTs for devices
using these cores do come from arch/arm64/boot/dts.

To avoid excess duplication in Makefiles, introduce one new Kconfig
symbol, CPU_V7M_V8M. The CPU_V7M_V8M cover both ARMv7-M and ARMv8-M
cores.

Signed-off-by: Marek Vasut 
Acked-by: Udit Kumar

lmb: Rework the LMB_ARCH_MEM_MAP symbol

2026-04-07T17:32:26+00:00

This symbol should not be enabled by the user directly but rather
selected when implemented in a given platform. This converts all of the
current users of this feature and hides the symbol.

Signed-off-by: Tom Rini

Merge tag 'v2026.04-rc4' into next

2026-03-09T21:26:34+00:00

Prepare v2026.04-rc4

arm: armv8: Flush TLB before enabling MMU

2026-02-24T14:16:06+00:00

Commit 9ebdbbc43e5f ("arm: armv8: invalidate dcache entries on
dcache_enable") broke Apple Silicon machines in certain scenarios.
If the MMU is currently not enabled we need to flush the TLB
before we enable it to prevent stale TLB entries from becoming
active again.  So move the __asm_invalidate_tlb_all() back
immediately before the mmu_setup() call.

Fixes: 9ebdbbc43e5f ("arm: armv8: invalidate dcache entries on dcache_enable")
Signed-off-by: Mark Kettenis 
Reviewed-by: Ilias Apalodimas

Merge patch series "treewide: Clean up usage of DECLARE_GLOBAL_DATA_PTR"

2026-02-17T19:51:26+00:00

Peng Fan (OSS)  says:

This patch set primarily removes unused DECLARE_GLOBAL_DATA_PTR
instances.

Many files declare DECLARE_GLOBAL_DATA_PTR and include
asm/global_data.h even though gd is never used. In these cases,
asm/global_data.h is effectively treated as a proxy header, which is
not a good practice.

Following the Include What You Use principle, files should include
only the headers they actually depend on, rather than relying on
global_data.h indirectly. This approach is also adopted in Linux kernel
[1].

The first few patches are prepartion to avoid building break after
remove the including of global_data.h.

A script is for filtering the files:
list=`find . -name "*.[ch]"`
for source in ${list}
do
        result=`sed -n '/DECLARE_GLOBAL_DATA_PTR/p' ${source}`
        if [ "${result}" == "DECLARE_GLOBAL_DATA_PTR;" ]; then
                echo "Found in ${source}"

                result=`sed -n '/\/p' ${source}`
                result2=`sed -n '/\/p' ${source}`
                if [ "${result}" == "" ] && [ "${result2}" == "" ] && [ "${result3}" == "" ];then
                        echo "Cleanup ${source}"
                        sed -i '/DECLARE_GLOBAL_DATA_PTR/{N;/\n[[:space:]]*$/d;s/.*\n//;}' ${source}
                        sed -i '/DECLARE_GLOBAL_DATA_PTR/d' ${source}
                        sed -i '/global_data.h/d' ${source}
                        git add ${source}
                fi
        fi
done

[1] https://lpc.events/event/17/contributions/1620/attachments/1228/2520/Linux%20Kernel%20Header%20Optimization.pdf

CI: https://github.com/u-boot/u-boot/pull/865

Link: https://lore.kernel.org/r/20260209-cleanup-v2-0-73a3a84ddbdb@nxp.com