1 # CMSIS-Core Files {#cmsis_core_files}
3 CMSIS-Core files can be differentiated in two main groups:
5 -# \subpage cmsis_standard_files are provided by Arm for supported CPU cores as part of the CMSIS-Core software component. These files typically do not require any modifications and are expected to be included via CMSIS-Core device files.
6 -# \subpage cmsis_device_files are specified in CMSIS-Core methodology, and are typically provided by CPU device vendors to correctly cover their specific functionalities. Some of them may expect additional application-specific changes.
8 The detailed file structure of the CMSIS-Core files is shown in the following picture.
10 
12 \subpage cmsis_files_dfps explains how \ref cmsis_core_files can be distributed in CMSIS-Pack format.
14 ## CMSIS-Core Standard Files {#cmsis_standard_files}
16 The CMSIS-Core Standard file implement all attributes specific to Arm processor cores and generally do not need any modifications.
18 The files are provided by Arm as CMSIS-Core software component that is part of the [CMSIS Software pack](../../General/html/cmsis_pack.html). The CMSIS-Core standard files can be split into following categories explained below:
20 - \ref cmsis_processor_files
21 - \ref cmsis_compiler_files
22 - \ref cmsis_feature_files
24 ### CMSIS-Core Processor Files {#cmsis_processor_files}
26 The CMSIS-Core processor files define the core peripherals and provide helper functions for their access.
28 The files have naming convention `core_<cpu>.h`, with one file available for each supported processor `<cpu>` as listed in the table below.
30 Header File | Target Processor Core
31 :----------------------|:-------------------------------
32 📂 CMSIS/Core/Include | CMSIS-Core include folder ([See on GitHub](https://github.com/ARM-software/CMSIS_6/tree/main/CMSIS/Core/Include/))
33 ┣ 📄 core_cm0.h | Cortex-M0 processor
34 ┣ 📄 core_cm0plus.h | Cortex-M0+ processor
35 ┣ 📄 core_cm1.h | Cortex-M1 processor
36 ┣ 📄 core_cm3.h | Cortex-M3 processor
37 ┣ 📄 core_cm4.h | Cortex-M4 processor
38 ┣ 📄 core_cm7.h | Cortex-M7 processor
39 ┣ 📄 core_cm23.h | Cortex-M23 processor
40 ┣ 📄 core_cm33.h | Cortex-M33 processor
41 ┣ 📄 core_cm35p.h | Cortex-M35P processor
42 ┣ 📄 core_cm55.h | Cortex-M55 processor
43 ┣ 📄 core_cm85.h | Cortex-M85 processor
44 ┣ 📄 core_starmc1.h | STAR-MC1 processor
45 ┣ 📄 core_sc000.h | SC000 processor
46 ┗ 📄 core_sc300.h | SC300 processor
48 The files also include the \ref cmsis_compiler_files and depending on the features supported by the core also correponding \ref cmsis_feature_files.
50 ### CMSIS-Core Compiler Files {#cmsis_compiler_files}
52 The CMSIS-Core compiler files provide consistent implementations of `#define` symbols that allow toolchain-agnostic usage of CMSIS-Core. \ref cmsis_processor_files rely on such toolchain-agnostic abstractions by including `cmsis_compiler.h` file that then selects the target compiler-specific implementatation depending on the toolchain used in the project.
54 CMSIS-Core compiler files are provided in `CMSIS/Core/Include/` directory, and define the supported compilers as listed in \ref tested_tools_sec. \ref compiler_conntrol_gr documents the functionalities provided by the CMSIS compliant toolchains.
56 Header File | Description
57 :--------------------------------------|:-------------------
58 📂 CMSIS/Core/Include | CMSIS-Core include folder ([See on GitHub](https://github.com/ARM-software/CMSIS_6/tree/main/CMSIS/Core/Include/))
59 ┣ 📄 cmsis_compiler.h | Main CMSIS-Core compiler header file
60 ┗ 📂 m-profile | Directory for M-Profile specific files
61   ┣ 📄 cmsis_armclang_m.h | CMSIS-Core Arm Clang compiler file for Cortex-M
62   ┣ 📄 cmsis_clang_m.h | CMSIS-Core Clang compiler file for Cortex-M
63   ┣ 📄 cmsis_gcc_m.h | CMSIS-Core GCC compiler file for Cortex-M
64   ┣ 📄 cmsis_iccarm_m.h | CMSIS-Core IAR compiler file for Cortex-M
65   â”— 📄 cmsis_tiarmclang_m.h | CMSIS-Core TI Clang compiler file
67 ### CMSIS-Core Architecture Feature Files {#cmsis_feature_files}
69 Several architecture-specific features are implemented in separate header files that then gets included by \ref cmsis_processor_files if corresponding feature is supported.
71 For Cortex-M cores following architecture feature files are provided in the `CMSIS/Core/Include/m-profile/` folder:
74 :-------------------|:-------------------
75 📂 CMSIS/Core/Include | CMSIS-Core include folder ([See on GitHub](https://github.com/ARM-software/CMSIS_6/tree/main/CMSIS/Core/Include/))
76 ┣ 📂 m-profile | Directory for M-Profile specific files
77   ┣ 📄 armv7m_cache1.h | \ref cache_functions_m7
78   ┣ 📄 armv7m_mpu.h | \ref mpu_functions
79   ┣ 📄 armv8m_mpu.h | \ref mpu8_functions
80   ┣ 📄 armv8m_pmu.h | \ref pmu8_functions
81   â”— 📄 armv81m_pac.h | PAC functions
82 ┗ 📄 tz_context.h | API header file for \ref context_trustzone_functions
84 ### CMSIS Version and Processor Information {#core_version_sect}
86 \ref __CM_CMSIS_VERSION is defined in the `cmsis_version.h` file and provides the version of the CMSIS-Core (Cortex-M). It is constructed as follows:
89 #define __CM_CMSIS_VERSION_MAIN ( 5U) /* [31:16] CMSIS Core(M) main version */
90 #define __CM_CMSIS_VERSION_SUB ( 7U) /* [15:0] CMSIS Core(M) sub version */
91 #define __CM_CMSIS_VERSION ((__CM_CMSIS_VERSION_MAIN << 16U) | \
92 __CM_CMSIS_VERSION_SUB ) /* CMSIS Core(M) version number */
96 The `cmsis_version.h` is included by each `cpu_<core>.h` so the CMSIS version defines are available via them already.
98 The `cpu_<core>.h` files use specific defines (such as \ref __CORTEX_M) that provide identification of the target processor core.
100 These defines can be used in the \ref device_h_pg to verify a minimum CMSIS-Core version as well as the target processor. Read more at \ref version_control_gr.