2017-07-07 20:41:49 +08:00
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.. _mem_domain_apis_test:
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Memory Domain APIs Test
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#######################
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Overview
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********
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This is a simple application that demonstrates the usage of Memory Domain APIs.
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Two memory domains (app0_domain and app1_domain) and three application threads
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(app thread 0, 1, 2) are created by the main thread.
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These threads will yield their execution alternately and we can observe the
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changes of domain partition regions during context switch via the serial console.
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Building and Running
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********************
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This project can be built and executed as follows:
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2017-11-10 23:30:36 +08:00
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.. zephyr-app-commands::
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:zephyr-app: samples/mpu/mem_domain_apis_test
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:board: frdm_k64f
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:goals: build flash
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:compact:
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2017-07-07 20:41:49 +08:00
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Reset the board and you will see messages on the corresponding
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Serial Port.
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Sample Output
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=============
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2017-10-18 00:46:49 +08:00
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In the beginning, main thread adds app threads into specific memory domains.
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2017-07-07 20:41:49 +08:00
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.. code-block:: console
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***** BOOTING ZEPHYR OS v1.9.0 - BUILD: Sep 20 2017 11:07:53 *****
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initialize memory domains
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add app thread 0 (0x20000280) into app0_domain.
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add app thread 1 (0x200002f8) into app1_domain.
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add app thread 2 (0x20000370) into app0_domain.
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After main thread yields its execution, we can see app thread 0 starts and the
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domain partition regions are set according to the memory partitions of app0_domain.
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.. code-block:: console
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main thread (0x200000c0) yields.
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[general] [DBG] arm_core_mpu_configure: Region info: 0x20000600 0x400
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[general] [DBG] _region_init: [4] 0x20000000 0x200005ff 0x0079e79e 0x00000001
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[general] [DBG] _region_init: [7] 0x20000600 0x2000061f 0x0071c71c 0x00000001
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[general] [DBG] _region_init: [11] 0x20000620 0x2002ffff 0x0079e79e 0x00000001
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[general] [DBG] configure_mpu_mem_domain: configure thread 0x20000280's domain
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[general] [DBG] arm_core_mpu_configure_mem_domain: configure domain: 0x20000440
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[general] [DBG] arm_core_mpu_configure_mem_domain: set region 0x8 0x20000420 0x20
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[general] [DBG] _region_init: [8] 0x20000420 0x2000043f 0x0079e79e 0x00000001
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[general] [DBG] arm_core_mpu_configure_mem_domain: set region 0x9 0x20000400 0x20
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[general] [DBG] _region_init: [9] 0x20000400 0x2000041f 0x00514514 0x00000001
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[general] [DBG] arm_core_mpu_configure_mem_domain: disable region 0xa
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app thread 0 (0x20000280) starts.
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Then, app thread 0 yields its execution and app thread 1 is going to be switched in.
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We can see the domain partition regions are set according to the memory partitions of
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app1_domain.
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.. code-block:: console
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app thread 0 (0x20000280) yields.
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[general] [DBG] arm_core_mpu_configure: Region info: 0x20000a20 0x400
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[general] [DBG] _region_init: [4] 0x20000000 0x20000a1f 0x0079e79e 0x00000001
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[general] [DBG] _region_init: [7] 0x20000a20 0x20000a3f 0x0071c71c 0x00000001
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[general] [DBG] _region_init: [11] 0x20000a40 0x2002ffff 0x0079e79e 0x00000001
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[general] [DBG] configure_mpu_mem_domain: configure thread 0x200002f8's domain
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[general] [DBG] arm_core_mpu_configure_mem_domain: configure domain: 0x2000050c
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[general] [DBG] arm_core_mpu_configure_mem_domain: set region 0x8 0x20000400 0x20
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[general] [DBG] _region_init: [8] 0x20000400 0x2000041f 0x0079e79e 0x00000001
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[general] [DBG] arm_core_mpu_configure_mem_domain: set region 0x9 0x20000420 0x20
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[general] [DBG] _region_init: [9] 0x20000420 0x2000043f 0x00514514 0x00000001
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[general] [DBG] arm_core_mpu_configure_mem_domain: disable region 0xa
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app thread 1 (0x200002f8) starts.
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