arc mpu ver3 does not allow mpu region overlap, so need to enable
MPU_REQUIRES_NON_OVERLAPPING_REGIONS.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
Add zephyr execution regions(text, rodata, data, noinit, bss, etc.)
with proper attributes to translation tables.
Linker script has been modified a little to align these sections to
minimum translation granule(4 kB).
With this in place, code cannot be overwritten accidently as it is
marked read only. Similarly, execution is prohibited from data/RW
section as it is marked execute-never.
Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>
Add MMU support for ARMv8A. We support 4kB translation granule.
Regions to be mapped with specific attributes are required to be
at least 4kB aligned and can be provided through platform file(soc.c).
Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>
Following changes are done:
- The vector table should be placed in text segment.
- Removed Vector relay table related entries as it is
only applicable to aarch32.
- irq_vector_table contains ISR pointers - should be placed
in rodata segment.
- put openocd_dbg in rodata and skip adding <linker_relocate.ld>
as CONFIG_CODE_DATA_RELOCATION is not defined for aarch64
currently (add later if needed).
Fixes: #22673
Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>
plt and got sections are used for dynamic linking which
is not supported in Zephyr.
Reference: #11953
commit 3ba7097e73 ("linker: add orphan sections to linker script")
Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>
We introduce a macro to define the IRQ priority level for
PendsV, and use it in arch/arm/include/aarch32/exc.h
to set the PendSV IRQ level. The commit does not change
the behavior of PendSV interrupt.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit adds some documentation for the exception
priority scheme for 32-bit ARM architecture variants.
In addition we document that SVCall priority level for
ARMv6-M is implicitly set to highest (by leaving it as
default).
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Public arm/aarch32/exc.h header file is used by both
Cortex-M and Cortex-R; we update the header information
accordingly.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit fixes the improper naming of the ROM sections.
1. Rename the first ROM section, which was previously named using the
`_TEXT_SECTION_NAME` definition, to `rom_start`, as this section does
not actually represent the text section.
2. Rename the second ROM section, which was previously named
`_TEXT_SECTION_NAME_2` which supposedly refers to the definition of
the same name that does not exist, to `_TEXT_SECTION_NAME`. Note that
this is indeed the section that contains the text section from the
source image.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit cleans up the linker.ld file for the Cortex-R arch.
* Convert all TAB characters to SPACE.
* Fix insane placement of curly brackets.
* Fix overall text alignments.
* Remove the special handlings for the Cortex-M devices that were
copied from `include/arm/aarch32/cortex_m/scripts/linker.ld`.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit relocates the `_vector_end` symbol that was previously
placed after the OpenOCD sections to before these sections, as the
OpenOCD debug sections are not part of the "vector table."
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit fixes the improper naming of the ROM sections.
1. Rename the first ROM section, which was previously named using the
`_TEXT_SECTION_NAME` definition, to `rom_start`, as this section does
not actually represent the text section.
2. Rename the second ROM section, which was previously named
`_TEXT_SECTION_NAME_2` which supposedly refers to the definition of
the same name that does not exist, to `_TEXT_SECTION_NAME`. Note that
this is indeed the section that contains the text section from the
source image.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit cleans-up the linker.ld file for the AArch64 arch.
* Convert all TAB characters to SPACE.
* Fix insane placement of curly brackets.
* Fix overall text alignments.
* Remove the special handlings for the Cortex-M devices that were
copied from `include/arm/aarch32/cortex_m/scripts/linker.ld`.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit fixes incorrect Cortex-R interrupt lock, unlock and state
check function implementations.
The issues can be summarised as follows:
1. The current implementation of 'z_arch_irq_lock' returns the value
of CPSR as the IRQ key and, since CPSR contains many other state
bits, this caused 'z_arch_irq_unlocked' to return false even when
IRQ is unlocked. This problem is fixed by isolating only the I-bit
of CPSR and returning this value as the IRQ key, such that it
returns a non-zero value when interrupt is disabled.
2. The current implementation of 'z_arch_irq_unlock' directly updates
the value of CPSR control field with the IRQ key and this can cause
other state bits in CPSR to be corrupted. This problem is fixed by
conditionally enabling interrupt using CPSIE instruction when the
value of IRQ key is a zero.
3. The current implementation of 'z_arch_is_in_isr' checks the value
of CPSR MODE field and returns true if its value is IRQ or FIQ.
While this does not normally cause an issue, the function can return
false when IRQ offloading is used because the offload function
executes in SVC mode. This problem is fixed by adding check for SVC
mode.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit removes the redundant text section offset specification in
the AArch64 linker script.
The text section offset is already specified by the
`text_section_offset.ld`, which is included by
`arch/common/CMakeLists.txt`.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
The callee-saved registers have been separated out and will not
be saved/restored if exception debugging is shut off.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Introduce the basic ARM64 architecture support.
A new CONFIG_ARM64 symbol is introduced for the new architecture and new
cmake / Kconfig files are added to switch between ARM and ARM64.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Instead of having TI_CCFG_PRESENT as a symbol that's only defined in
soc/arm/ti_simplelink/cc13x2_cc26x2/Kconfig.defconfig.series and y when
SOC_SERIES_CC13X2_CC26X2 is enabled, turn it into a helper symbol that's
selected by SOC_SERIES_CC13X2_CC26X2.
This avoids having a symbol that's only defined in a Kconfig.defconfig
file, which is confusing. It also makes things a bit more generic, in
case other boards with CCFGs are added.
Also rename it to HAS_TI_CCFG to be consistent with other helper
symbols, and add a help text.
Flagged by scripts/kconfig/lint.py.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
In zephyr_linker_sources().
This is done since the point of the location is to place things at given
offsets. This can only be done consistenly if the linker code is placed
into the _first_ section.
All uses of TEXT_START are replaced with ROM_START.
ROM_START is only supported in some arches, as some arches have several
custom sections before text. These don't currently have ROM_START or
TEXT_START available, but that could be added with a bit of refactoring
in their linker script.
No SORT_KEYs are changed.
This also fixes an error introduced when TEXT_START was added, where
TEXT_SECTION_OFFSET was applied to riscv's common linker.ld instead of
to openisa_rv32m1's specific linker.ld.
Signed-off-by: Øyvind Rønningstad <oyvind.ronningstad@nordicsemi.no>
This commit does the following:
- renames the 'text' ROM section to 'rom_start', to reflect
that this section is the first section of the image.
- renames the 'TEXT_SECTION_NAME_2' section to 'text', since
that section (whose start is pointed by _image_text_start)
holds the entire image text section.
The commit removes the confusion by having multiple ROM sections
named as 'text' in ARM Cortex-M builds.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Signed-off-by: Øyvind Rønningstad <oyvind.ronningstad@nordicsemi.no>
We should not use indentation for pre-processor directives.
This commit fixes the indentation in the ARM Cortex-M linker
script.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Implement a set of per-cpu trampoline stacks which all
interrupts and exceptions will initially land on, and also
as an intermediate stack for privilege changes as we need
some stack space to swap page tables.
Set up the special trampoline page which contains all the
trampoline stacks, TSS, and GDT. This page needs to be
present in the user page tables or interrupts don't work.
CPU exceptions, with KPTI turned on, are treated as interrupts
and not traps so that we have IRQs locked on exception entry.
Add some additional macros for defining IDT entries.
Add special handling of locore text/rodata sections when
creating user mode page tables on x86-64.
Restore qemu_x86_64 to use KPTI, and remove restrictions on
enabling user mode on x86-64.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
generated_dts_board.h is pretty redundant and confusing as a name. Call
it devicetree.h instead.
dts.h would be another option, but DTS stands for "devicetree source"
and is the source code format, so it's a bit confusing too.
The replacement was done by grepping for 'generated_dts_board' and
'GENERATED_DTS_BOARD'.
Two build diagram and input-output SVG files were updated as well, along
with misc. documentation.
hal_ti, mcuboot, and ci-tools updates are included too, in the west.yml
update.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
- In early boot, enable the syscall instruction and set up
necessary MSRs
- Add a hook to update page tables on context switch
- Properly initialize thread based on whether it will
start in user or supervisor mode
- Add landing function for system calls to execute the
desired handler
- Implement arch_user_string_nlen()
- Implement logic for dropping a thread down to user mode
- Reserve per-CPU storage space for user and privilege
elevation stack pointers, necessary for handling syscalls
when no free registers are available
- Proper handling of gs register considerations when
transitioning privilege levels
Kernel page table isolation (KPTI) is not yet implemented.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This code:
1) Doesn't work
2) Hasn't ever been enabled by default
3) We mitigate Spectre V2 via Extended IBRS anyway
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
We use a fixed value of 32 as the way interrupts/exceptions
are setup in x86_64's locore.S do not lend themselves to
Kconfig configuration of the vector to use.
HW-based kernel oops is now permanently on, there's no reason
to make it optional that I can see.
Default vectors for IPI and irq offload adjusted to not
collide.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Nothing too fancy here, we try as much as possible to
use the same register layout as the C calling convention.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Includes linker script fragments for the kernel object
tables and automatic memory partitions. The data section
is moved to the end per the requirements of
include/linker/kobject.h.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
z_x86_thread_page_tables_get() now works for both user
and supervisor threads, returning the kernel page tables
in the latter case. This API has been up-leveled to
a common header.
The per-thread privilege elevation stack initial stack
pointer, and the per-thread page table locations are no
longer computed from other values, and instead are stored
in thread->arch.
A problem where the wrong page tables were dumped out
on certain kinds of page faults has been fixed.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Add two new non-static APIs for dumping out the
page table entries for a specified memory address,
and move to the main MMU code. Has debugging uses
when trying to figure out why memory domains are not
set up correctly.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
We don't need to set up GDT data descriptors for setting
%gs. Instead, we use the x86 MSRs to set GS_BASE and
KERNEL_GS_BASE.
We don't currently allow user mode to set %gs on its own,
but later on if we do, we have everything set up to issue
'swapgs' instructions on syscall or IRQ.
Unused entries in the GDT have been removed.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Define MSR register addresses for various MSRs related to
SYSCALL/SYSRET. We also add MSRs for FS/GS base addresses
(for GS, both kernel and user mode) to support SWAPGS.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
These were previously assumed to always be fatal.
We can't have the faulting thread's XMM registers
clobbered, so put the SIMD/FPU state onto the stack
as well. This is fairly large (512 bytes) and the
execption stack is already uncomfortably small, so
increase to 2K.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit addresses the following issues:
1. Add a new Kconfig configuration for specifying Dual-redundant Core
Lock-step (DCLS) processor topology.
2. Register initialisation is only required when Dual-redundant Core
Lock-step (DCLS) is implemented in hardware. This initialisation is
required on DCLS only because the architectural registers are in an
indeterminate state after reset and therefore the initial register
state of the two parallel executing cores are not guaranteed to be
identical, which can lead to DCCM detecting it as a hardware fault.
A conditional compilation check for this hardware configuration
using the newly added CONFIG_CPU_HAS_DCLS flag has been added.
3. The existing CPU register initialisation code did not take into
account the banked registers for every execution mode. The new
implementation ensures that all architectural registers of every
mode are initialised.
4. Add VFP register initialisation for when floating-point support is
enabled and the core is configured in DCLS topology. This
initialisation sequence is required for the same reason given in
the first issue.
5. Add provision for platform-specific initialisation on Cortex-R
using PLATFORM_SPECIFIC_INIT config and z_platform_init function.
6. Remove seemingly pointless and inadequately defined STACK_MARGIN.
Not only does it violate the 8-byte stack alignment rule, it does
not provide any form of real stack protection.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commits implements the support for dynamic direct
interrupts for the ARM Cortex-M architecture, and exposes
the support to the user as an ARM-only API.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The SRAM address and size are currently available as both
DT_SRAM_{BASE_ADDRESS,SIZE} and as CONFIG_SRAM_{BASE_ADDRESS,SIZE} (via
the Kconfig preprocessor).
Use the CONFIG_SRAM_* versions everywhere, and remove generation of the
DT_SRAM_* versions from gen_defines.py.
The Kconfig symbols currently depend on 'ARC || ARM || NIOS2 || X86'.
Not sure why, so I removed it.
It looks like no configuration files set CONFIG_SRAM_* at the moment, so
another option might be to use the DT_* symbols everywhere instead. Some
Kconfig.defconfig.series files add defaults to them though.
Also improve the help texts for CONFIG_SRAM_* to say that they normally
come from devicetree rather than configuration files.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
This is no longer needed, since all in-tree platforms are only using
the standard mstatus formats. Remove it to avoid the complexity.
Signed-off-by: Olof Johansson <olof@lixom.net>
Out-of-tree code can still be using the old file locations. Introduce
header shims to include the headers from the new correct location and
print a warning message.
Add also a new Kconfig symbol to suppress such warning.
The shim will go away after two releases, so make sure to adapt your
application for the new locations.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Before introducing the code for ARM64 (AArch64) we need to relocate the
current ARM code to a new AArch32 sub-directory. For now we can assume
that no code is shared between ARM and ARM64.
There are no functional changes. The code is moved to the new location
and the file paths are fixed to reflect this change.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
to its own linker file snippet so snippets can be placed before it.
Using zephyr_linker_sources().
Signed-off-by: Øyvind Rønningstad <oyvind.ronningstad@nordicsemi.no>
