1 /**************************************************************************//**
2 * @file cmsis_armcc.txt
3 * @brief CMSIS compiler specific macros, functions, instructions
6 ******************************************************************************/
7 /* CMSIS compiler control architecture macros */
9 \defgroup comp_cntrl_gr Compiler Control
10 \brief Compiler agnostic \#define symbols for generic C/C++ source code
12 The CMSIS-Core provides the header file \b cmsis_compiler.h with consistent \#define symbols to generate C or C++ source files that should be compiler agnostic.
13 Each CMSIS compliant compiler should support the functionality described in this section.
23 \brief Set to 1 when generating code for ARMv7-A (Cortex-A7)
25 The \b \#define __ARM_ARCH_7A__ is set to 1 when generating code for the ARMv7-A architecture. This architecture is for example used by the Cortex-A7 processor.
30 \brief Pass information from the compiler to the assembler.
32 The \b __ASM keyword can declare or define an embedded assembly function or incorporate inline assembly into a function
33 (shown in the code example below).
37 // Reverse bit order of value
39 __attribute__( ( always_inline ) ) __STATIC_INLINE uint32_t __RBIT(uint32_t value)
43 __ASM volatile ("rbit %0, %1" : "=r" (result) : "r" (value) );
51 \brief Recommend that function should be inlined by the compiler.
53 Inline functions offer a trade-off between code size and performance. By default, the compiler decides during optimization whether to
54 inline code or not. The \b __INLINE attribute gives the compiler an hint to inline this function.
55 Still, the compiler may decide not to inline the function. As the function is global an callable function is also generated.
59 const uint32_t led_mask[] = {1U << 4, 1U << 5, 1U << 6, 1U << 7};
61 //------------------------------------------------------------------------------
63 //------------------------------------------------------------------------------
64 __INLINE static void LED_On (uint32_t led) {
66 PTD->PCOR = led_mask[led];
73 \brief Define a static function should be inlined by the compiler.
75 Defines a static function that may be inlined by the compiler. If the compiler generates inline code for
76 all calls to this functions, no additional function implementation is generated which may further optimize space.
80 __STATIC_INLINE uint32_t GIC_GetPriority(IRQn_Type IRQn)
82 return((uint32_t)GICDistributor->D_IPRIORITYR[((uint32_t)(int32_t)IRQn)]);
89 \brief Inform the compiler that a function does not return.
91 Informs the compiler that the function does not return. The compiler can then perform optimizations by
92 removing code that is never reached.
96 // OS idle demon (running when no other thread is ready to run).
98 __NO_RETURN void os_idle_demon (void);
104 \brief Inform that a variable shall be retained in executable image.
106 Definitions tagged with \b __USED in the source code should be not removed by the linker when detected as unused.
108 <b> Code Example:</b>
110 // Export following variables for debugging
111 __USED uint32_t const CMSIS_RTOS_API_Version = osCMSIS;
112 __USED uint32_t const CMSIS_RTOS_RTX_Version = osCMSIS_RTX;
113 __USED uint32_t const os_clockrate = OS_TICK;
114 __USED uint32_t const os_timernum = 0;
120 \brief Export a function or variable weakly to allow overwrites.
122 Functions defined with \b __WEAK export their symbols weakly. A function defined weak behaves like a normal defined
123 function unless a non-weak function with the same name is linked into the same image. If both a non-weak
124 function and a weak defined function exist in the same image, then all calls to the function resolve to the non-weak
127 Functions declared with \b __WEAK and then defined without \b __WEAK behave as non-weak functions.
129 <b> Code Example:</b>
131 __WEAK void SystemInit(void)
134 SystemCoreClockSetup();
141 \brief Minimum alignment for a variable.
143 Specifies a minimum alignment for a variable or structure field, measured in bytes.
145 <b> Code Example:</b>
147 uint32_t stack_space[0x100] __ALIGNED(8); // 8-byte alignment required
153 \brief Request smallest possible alignment.
155 Specifies that a type must have the smallest possible alignment.
157 <b> Code Example:</b>
161 uint32_t u32[2] __PACKED;
169 /* end group comp_cntrl_gr */
171 /* ########################### Core Function Access ########################### */
173 \defgroup core_reg_func_gr Core Register Access
174 \brief Functions to access the Cortex-A core registers
179 \fn __STATIC_INLINE uint32_t __get_FPSCR(void)
181 Returns the current value of the Floating Point Status/Control register.
183 \fn __STATIC_INLINE void __set_FPSCR(uint32_t fpscr)
185 Assigns the given value to the Floating Point Status/Control register.
187 \fn __STATIC_INLINE uint32_t __get_CPSR(void)
189 This function returns the content of the CPSR Register.
191 \fn __STATIC_INLINE void __set_CPSR(uint32_t cpsr)
193 This function assigns the given value to the CPSR Register.
195 \fn __STATIC_INLINE __ASM void __set_SP(uint32_t stack)
197 This function assigns the given value to the current stack pointer.
199 \fn __STATIC_INLINE __ASM void __set_SP_usr(uint32_t topOfProcStack)
201 This function assigns the given value to the USR/SYS Stack Pointer (PSP).
203 \fn __STATIC_INLINE uint32_t __get_FPEXC(void)
205 This function returns the current value of the Floating Point Exception Control register.
207 \fn __STATIC_INLINE void __set_FPEXC(uint32_t fpexc)
209 This function assigns the given value to the Floating Point Exception Control register.
211 \fn __STATIC_INLINE uint32_t __get_CPACR(void)
213 This function returns the current value of the Coprocessor Access Control register.
215 \fn __STATIC_INLINE void __set_CPACR(uint32_t cpacr)
217 This function assigns the given value to the Coprocessor Access Control register.
219 \fn __STATIC_INLINE uint32_t __get_CBAR()
221 This function returns the value of the Configuration Base Address register.
223 \fn __STATIC_INLINE uint32_t __get_TTBR0()
225 This function returns the value of the Translation Table Base Register 0.
227 \fn __STATIC_INLINE void __set_TTBR0(uint32_t ttbr0)
229 This function assigns the given value to the Translation Table Base Register 0.
231 \fn __STATIC_INLINE uint32_t __get_DACR()
233 This function returns the value of the Domain Access Control Register.
235 \fn __STATIC_INLINE void __set_DACR(uint32_t dacr)
237 This function assigns the given value to the Domain Access Control Register.
239 \fn __STATIC_INLINE void __set_SCTLR(uint32_t sctlr)
241 This function assigns the given value to the System Control Register.
243 \fn __STATIC_INLINE uint32_t __get_SCTLR()
245 This function returns the value of the System Control Register.
247 \fn __STATIC_INLINE void __set_ACTRL(uint32_t actrl)
249 This function assigns the given value to the Auxiliary Control Register.
251 \fn __STATIC_INLINE uint32_t __get_ACTRL(void)
253 This function returns the value of the Auxiliary Control Register.
255 \fn __STATIC_INLINE uint32_t __get_MPIDR(void)
257 This function returns the value of the Multiprocessor Affinity Register.
259 \fn __STATIC_INLINE uint32_t __get_VBAR(void)
261 This function returns the value of the Vector Base Address Register.
263 \fn __STATIC_INLINE void __set_VBAR(uint32_t vbar)
265 This function assigns the given value to the Vector Base Address Register.
267 \fn __STATIC_INLINE void __set_CNTP_TVAL(uint32_t value)
269 This function assigns the given value to PL1 Physical Timer Value Register (CNTP_TVAL).
271 \fn __STATIC_INLINE uint32_t __get_CNTP_TVAL()
273 This function returns the value of the PL1 Physical Timer Value Register (CNTP_TVAL).
275 \fn __STATIC_INLINE void __set_CNTP_CTL(uint32_t value)
277 This function assigns the given value to PL1 Physical Timer Control Register (CNTP_CTL).
279 \fn __STATIC_INLINE void __set_TLBIALL(uint32_t value)
282 \fn __STATIC_INLINE void __set_BPIALL(uint32_t value)
284 Branch Predictor Invalidate All
286 \fn __STATIC_INLINE void __set_ICIALLU(uint32_t value)
288 Instruction Cache Invalidate All
290 \fn __STATIC_INLINE void __set_DCCMVAC(uint32_t value)
294 \fn __STATIC_INLINE void __set_DCIMVAC(uint32_t value)
296 Data cache invalidate
298 \fn __STATIC_INLINE void __set_DCCIMVAC(uint32_t value)
300 Data cache clean and invalidate
305 /* end group core_reg_func_gr */
307 /* ########################## Core Instruction Access ######################### */
309 \defgroup CMSIS_Core_InstructionInterface Intrinsic Functions for CPU Instructions
310 \brief Functions that generate specific Cortex-A CPU Instructions
316 \details No Operation does nothing. This instruction can be used for code alignment purposes.
320 \details Wait For Interrupt is a hint instruction that suspends execution until one of a number of events occurs.
323 \details Wait For Event is a hint instruction that permits the processor to enter
326 \details Send Event is a hint instruction. It causes an event to be signaled to the CPU.
329 \details Instruction Synchronization Barrier flushes the pipeline in the processor,
330 so that all instructions following the ISB are fetched from cache or memory,
331 after the instruction has been completed.
334 \details Acts as a special kind of Data Memory Barrier.
335 It completes when all explicit memory accesses before this instruction complete.
338 \details Ensures the apparent order of the explicit memory operations before
339 and after the instruction, without ensuring their completion.
343 \details Reverses the byte order in integer value.
347 \details Reverses the byte order in two unsigned short values.
349 /* leave definition here */
350 _STATIC_INLINE __ASM uint32_t __REV16(uint32_t value);
353 \details Reverses the byte order in a signed short value with sign extension to integer.
355 /* leave definition here */
356 \fn __STATIC_INLINE __ASM int32_t __REVSH(int32_t value);
360 \details Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits.
363 \details Causes the processor to enter Debug state.
364 Debug tools can use this to investigate system state when the instruction at a particular address is reached.
367 \fn __STATIC_INLINE uint32_t __RBIT(uint32_t value)
369 Reverses the bit order of the given value.
373 Counts the number of leading zeros of a data value.
377 /* end of group CMSIS_Core_InstructionInterface */