Add support of ARC mpu v6
* minimal region size down to 32 bytes
* maximal region number up to 32
* not support uncacheable region and volatile uncached region
* clean up mpu code for better readablity
Signed-off-by: Yuguo Zou <yuguo.zou@synopsys.com>
Previously MPU registers macros are only defined within its own header
files and could not be used by other part of program. This commit unify
them together.
Signed-off-by: Yuguo Zou <yuguo.zou@synopsys.com>
Now that device_api attribute is unmodified at runtime, as well as all
the other attributes, it is possible to switch all device driver
instance to be constant.
A coccinelle rule is used for this:
@r_const_dev_1
disable optional_qualifier
@
@@
-struct device *
+const struct device *
@r_const_dev_2
disable optional_qualifier
@
@@
-struct device * const
+const struct device *
Fixes#27399
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
The core kernel computes the initial stack pointer
for a thread, properly aligning it and subtracting out
any random offsets or thread-local storage areas.
arch_new_thread() no longer needs to make any calculations,
an initial stack frame may be placed at the bounds of
the new 'stack_ptr' parameter passed in. This parameter
replaces 'stack_size'.
thread->stack_info is now set before arch_new_thread()
is invoked, z_new_thread_init() has been removed.
The values populated may need to be adjusted on arches
which carve-out MPU guard space from the actual stack
buffer.
thread->stack_info now has a new member 'delta' which
indicates any offset applied for TLS or random offset.
It's used so the calculations don't need to be repeated
if the thread later drops to user mode.
CONFIG_INIT_STACKS logic is now performed inside
z_setup_new_thread(), before arch_new_thread() is called.
thread->stack_info is now defined as the canonical
user-accessible area within the stack object, including
random offsets and TLS. It will never include any
carved-out memory for MPU guards and must be updated at
runtime if guards are removed.
Available stack space is now optimized. Some arches may
need to significantly round up the buffer size to account
for page-level granularity or MPU power-of-two requirements.
This space is now accounted for and used by virtue of
the Z_THREAD_STACK_SIZE_ADJUST() call in z_setup_new_thread.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
ARC_MPU_VER 2 has a strong requirement in
* size, must be >= 2048 bytes and power of 2
* start address must be aligned to size
It may bring a big waste of memory.
On the other hand, GEN_PRIV_STACK is used for ARC_MPU_VER 2,
it conflicts with MPU_STACK_GUARD.
So considering the limmitations, remove MPU_STACK_GUARD for
ARC_MPU_VER 2
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
drop the original C macro based allocation of privilged stack as
it may cause the waste of memory for ARC MPUv2.
now use the way of GEN_PRIV_STACK to generate privilege stack as
other archs did, e.g. ARM.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
Rename reserved function names in arch/ subdirectory. The Python
script gen_priv_stacks.py was updated to follow the 'z_' prefix
naming.
Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
Similar issue to what was fixed earlier in the MPUv3
code. start + size should be <= r_addr_end. Fixes
a problem where the last byte of an MPU region is
incorrectly reported as out-of-bounds.
Fixes: #15131
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
* separate the ARC MPU driver into 2 parts
* arc_mpu_v2_internal.h for ARC MPUv2
* arc_mpu_v3_internal.h for ARC MPUv3
* For ARC MPUv2, keep the main design, but update and optimize the code
* For ARC MPUv3, implement mpu region split to supprt MPU region overlap
* misc updates and bug fixes
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
