u-boot.git/arch/arm/include/asm/system.h, branch v2018.09

arm: v7: Kconfig: Rename CPU_V7 as CPU_V7A

2018-05-07T19:53:24+00:00

Currently CPU_V7 kconfig symbol supports only ARMv7A architectures under
armv7 folder. This led to a misconception of creating separate folders
for armv7m and armv7r. There is no reason to create separate folder for
other armv7 based architectures when it can co-exist with few Kconfig
symbols.

As a first step towards a common folder, rename CPU_V7 as CPUV7A. Later
separate Kconfig symbols can be added for CPU_V7R and CPU_V7M and
can co exist in the same folder.

Reviewed-by: Tom Rini 
Tested-by: Michal Simek 
Suggested-by: Alexander Graf 
Signed-off-by: Lokesh Vutla

arm: make save_boot_params_ret prototype visible for AArch64

2017-11-21T22:57:22+00:00

The save_boot_params_ret() prototype (for those of us, that have a
valid SP on entry and can implement save_boot_params() in C), was
previously only defined for !defined(CONFIG_ARM64).

This moves the declaration to a common block to ensure the prototype
is available to everyone that might need it.

Signed-off-by: Philipp Tomsich 
Tested-by: Andy Yan

armv8: layerscape: Enable falcon boot

2017-10-09T15:48:45+00:00

Add jump_to_image_linux() for arm64. Add "noreturn" flag to
armv8_switch_to_el2(). Add hooks to fsl-layerscape to enable falcon
boot.

Signed-off-by: York Sun 
Reviewed-by: Simon Glass 
Reviewed-by: Łukasz Majewski 
Tested-by: Łukasz Majewski

arm: Support cache invalidate

2017-05-12T02:03:39+00:00

At present there is not operation to invalidate a cache range. This seems
to be needed to fill out the cache operations. Add an implementation based
on the flush operation.

Signed-off-by: Simon Glass 
Reviewed-by: York Sun

armv8: mmu: Add a function to change mapping attributes

2017-03-14T15:44:03+00:00

Function mmu_change_region_attr() is added to change existing mapping
with updated PXN, UXN and memory type. This is a break-before-make
process during which the mapping becomes fault (invalid) before final
attributres are set.

Signed-off-by: York Sun

armv8: aarch64: Fix the warning about x1-x3 nonzero issue

2017-01-18T17:29:33+00:00

For 64-bit kernel, there is a warning about x1-x3 nonzero in violation
of boot protocol. To fix this issue, input argument 4 is added for
armv8_switch_to_el2 and armv8_switch_to_el1. The input argument 4 will
be set to the right value, such as zero.

Signed-off-by: Alison Wang 
Reviewed-by: Alexander Graf 
Tested-by: Ryan Harkin 
Tested-by: Michal Simek 
Reviewed-by: York Sun

ARMv8: Setup PSCI memory and device tree

2016-12-15T19:57:51+00:00

Newly add ARMv8 PSCI needs to be initialized, be copied or reserved in right
place, this patch does all the setup steps.

Signed-off-by: Hongbo Zhang 
Reviewed-by: Tom Rini 
Reviewed-by: York Sun

armv8: fsl-layerscape: Support loading 32-bit OS with PSCI enabled

2016-11-22T19:40:24+00:00

As PSCI and secure monitor firmware framework are enabled, this patch is
to support loading 32-bit OS in such case. The default target exception
level returned to U-Boot is EL2, so the corresponding work to switch to
AArch32 EL2 and jump to 32-bit OS are done in U-Boot and secure firmware
together.

Signed-off-by: Alison Wang 
Reviewed-by: York Sun

armv8: Support loading 32-bit OS in AArch32 execution state

2016-11-22T19:40:24+00:00

To support loading a 32-bit OS, the execution state will change from
AArch64 to AArch32 when jumping to kernel.

The architecture information will be got through checking FIT image,
then U-Boot will load 32-bit OS or 64-bit OS automatically.

Signed-off-by: Ebony Zhu 
Signed-off-by: Alison Wang 
Signed-off-by: Chenhui Zhao 
Reviewed-by: York Sun

arm: Set TTB XN bit in case DCACHE_OFF for LPAE mode

2016-11-13T20:54:36+00:00

While we setup the mmu initially we mark set_section_dcache with
DCACHE_OFF flag. In case of non-LPAE mode the DCACHE_OFF macro
is rightly defined with TTB_SECT_XN_MASK set so as to mark all the
4GB XN. In case of LPAE mode  XN(Execute-never) bit is not set with
DCACHE_OFF. Hence XN bit is not set by default for DCACHE_OFF which
keeps all the regions execute okay and this leads to random speculative
fetches in random memory regions which was eventually caught by kernel
omap-l3-noc driver.

Fix this to mark the regions as XN by default.

Signed-off-by: Keerthy 
Reviewed-by: Alexander Graf 
Reviewed-by: Tom Rini