threadx_mpu_partition_demo Directory Reference

Directory dependency graph for threadx_mpu_partition_demo:

Directories
	src

Detailed Description

Installs a small static Armv8-M MPU region table at boot via ra8_mpu_configure, then runs one ThreadX worker blinking LED1 to prove the partition did not wedge ordinary code execution. It is the positive-path counterpart to mpu_partition_simple, which deliberately provokes a fault.

#	Region	Base	Size	Privileged	Unprivileged	Exec
0	MRAM	0x02000000	1 MiB	RO	RO	yes
1	SRAM	0x22000000	1 MiB	RW	RW	no
2	Peripheral	0x40000000	256 MiB	RW	none	no

PRIVDEFENA is left enabled, so privileged accesses outside the declared regions fall through to the architectural defaults. That is what keeps the kernel's own bookkeeping pages reachable without enumerating them, and clearing it is how a table like this wedges a scheduler. MAIR slots stay at 0 (device-nGnRnE), adequate here but not a partitioning policy: a real one would split secure from non-secure and add per-thread sub-regions.

There is no separate failure counter, because a broken partition and a wedged scheduler surface identically – the worker's counter stops advancing either way.

SysTick_Handler forwards into _tx_timer_interrupt for the kernel tick. LEDs per EK-RA8D2 v1 UM Table 24 p 31; MPU programming model per HUM R01UH1065EJ0130 Ch "Memory Protection Unit (MPU)" and the Armv8-M Architecture Reference Manual.