diff options
Diffstat (limited to 'os/common/ports/ARMCMx/compilers/GCC/crt0.c')
| -rw-r--r-- | os/common/ports/ARMCMx/compilers/GCC/crt0.c | 304 |
1 files changed, 3 insertions, 301 deletions
diff --git a/os/common/ports/ARMCMx/compilers/GCC/crt0.c b/os/common/ports/ARMCMx/compilers/GCC/crt0.c index daa6a63aa..c3bb3fd79 100644 --- a/os/common/ports/ARMCMx/compilers/GCC/crt0.c +++ b/os/common/ports/ARMCMx/compilers/GCC/crt0.c @@ -18,205 +18,15 @@ */
/**
- * @file ARMCMx/GCC/crt0.c
- * @brief Generic GCC Cortex-Mx startup file.
+ * @file ARMCMx/compilers/GCC/crt0.c
+ * @brief Startup stub functions.
*
* @addtogroup ARMCMx_GCC_STARTUP
* @{
*/
-#include <stdint.h>
#include <stdbool.h>
-#if !defined(FALSE)
-#define FALSE 0
-#endif
-
-#if !defined(TRUE)
-#define TRUE 1
-#endif
-
-#define SCB_CPACR *((uint32_t *)0xE000ED88U)
-#define SCB_FPCCR *((uint32_t *)0xE000EF34U)
-#define SCB_FPDSCR *((uint32_t *)0xE000EF3CU)
-#define FPCCR_ASPEN (uint32_t)((uint32_t)0x1U << (uint32_t)31U)
-#define FPCCR_LSPEN (uint32_t)((uint32_t)0x1U << (uint32_t)30U)
-
-typedef void (*funcp_t)(void);
-typedef funcp_t * funcpp_t;
-
-#define SYMVAL(sym) (uint32_t)&(sym)
-
-/*
- * Area fill code, it is a macro because here functions cannot be called
- * until stacks are initialized.
- */
-#define fill32(start, end, filler) do { \
- uint32_t *p1 = (start); \
- uint32_t *p2 = (end); \
- /*lint -save -e681 [2.1] Lint cannot see the scatter file symbols.*/ \
- while (p1 < p2) { \
- /*lint -restore*/ \
- *p1++ = (filler); \
- } \
-} while (false)
-
-/*===========================================================================*/
-/**
- * @name Startup settings
- * @{
- */
-/*===========================================================================*/
-
-/**
- * @brief Control special register initialization value.
- * @details The system is setup to run in privileged mode using the PSP
- * stack (dual stack mode).
- */
-#if !defined(CRT0_CONTROL_INIT) || defined(__DOXYGEN__)
-#define CRT0_CONTROL_INIT 0x00000002
-#endif
-
-/**
- * @brief Stack segments initialization switch.
- */
-#if !defined(CRT0_STACKS_FILL_PATTERN) || defined(__DOXYGEN__)
-#define CRT0_STACKS_FILL_PATTERN 0x55555555
-#endif
-
-/**
- * @brief Stack segments initialization switch.
- */
-#if !defined(CRT0_INIT_STACKS) || defined(__DOXYGEN__)
-#define CRT0_INIT_STACKS TRUE
-#endif
-
-/**
- * @brief DATA segment initialization switch.
- */
-#if !defined(CRT0_INIT_DATA) || defined(__DOXYGEN__)
-#define CRT0_INIT_DATA TRUE
-#endif
-
-/**
- * @brief BSS segment initialization switch.
- */
-#if !defined(CRT0_INIT_BSS) || defined(__DOXYGEN__)
-#define CRT0_INIT_BSS TRUE
-#endif
-
-/**
- * @brief Constructors invocation switch.
- */
-#if !defined(CRT0_CALL_CONSTRUCTORS) || defined(__DOXYGEN__)
-#define CRT0_CALL_CONSTRUCTORS TRUE
-#endif
-
-/**
- * @brief Destructors invocation switch.
- */
-#if !defined(CRT0_CALL_DESTRUCTORS) || defined(__DOXYGEN__)
-#define CRT0_CALL_DESTRUCTORS TRUE
-#endif
-
-/** @} */
-
-/*===========================================================================*/
-/**
- * @name Symbols from the scatter file
- */
-/*===========================================================================*/
-
-/**
- * @brief Main stack lower boundary.
- * @details This symbol must be exported by the linker script and represents
- * the main stack lower boundary.
- */
-extern uint32_t __main_stack_base__;
-
-/**
- *
- * @brief Main stack initial position.
- * @details This symbol must be exported by the linker script and represents
- * the main stack initial position.
- */
-extern uint32_t __main_stack_end__;
-
-/**
- * @brief Process stack lower boundary.
- * @details This symbol must be exported by the linker script and represents
- * the process stack lower boundary.
- */
-extern uint32_t __process_stack_base__;
-
-/**
- * @brief Process stack initial position.
- * @details This symbol must be exported by the linker script and represents
- * the process stack initial position.
- */
-extern uint32_t __process_stack_end__;
-
-/**
- * @brief ROM image of the data segment start.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern uint32_t _textdata;
-
-/**
- * @brief Data segment start.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern uint32_t _data;
-
-/**
- * @brief Data segment end.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern uint32_t _edata;
-
-/**
- * @brief BSS segment start.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern uint32_t _bss_start;
-
-/**
- * @brief BSS segment end.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern uint32_t _bss_end;
-
-/**
- * @brief Constructors table start.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern funcp_t __init_array_start;
-
-/**
- * @brief Constructors table end.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern funcp_t __init_array_end;
-
-/**
- * @brief Destructors table start.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern funcp_t __fini_array_start;
-
-/**
- * @brief Destructors table end.
- * @pre The symbol must be aligned to a 32 bits boundary.
- */
-extern funcp_t __fini_array_end;
-
-/** @} */
-
-/**
- * @brief Application @p main() function.
- */
-extern void main(void);
-
/**
* @brief Early initialization.
* @details This hook is invoked immediately after the stack initialization
@@ -255,119 +65,11 @@ void __late_init(void) {} __attribute__((noreturn, weak))
#endif
/*lint -save -e9075 [8.4] All symbols are invoked from asm context.*/
-void _default_exit(void) {
+void __default_exit(void) {
/*lint -restore*/
while (true) {
}
}
-/**
- * @brief Reset vector.
- */
-#if !defined(__DOXYGEN__)
-__attribute__((naked))
-#endif
-/*lint -save -e9075 [8.4] All symbols are invoked from asm context.*/
-void Reset_Handler(void) {
-/*lint -restore*/
- uint32_t psp, reg;
-
- /* Process Stack initialization, it is allocated starting from the
- symbol __process_stack_end__ and its lower limit is the symbol
- __process_stack_base__.*/
- __asm volatile ("cpsid i");
- psp = SYMVAL(__process_stack_end__);
- __asm volatile ("msr PSP, %0" : : "r" (psp));
-
-#if CORTEX_USE_FPU == TRUE
- /* Initializing the FPU context save in lazy mode.*/
- SCB_FPCCR = FPCCR_ASPEN | FPCCR_LSPEN;
-
- /* CP10 and CP11 set to full access.*/
- SCB_CPACR |= 0x00F00000U;
-
- /* FPSCR and FPDSCR initially zero.*/
- reg = 0;
- __asm volatile ("vmsr FPSCR, %0" : : "r" (reg) : "memory");
- SCB_FPDSCR = reg;
-
- /* CPU mode initialization, enforced FPCA bit.*/
- reg = (uint32_t)CRT0_CONTROL_INIT | 4U;
-#else
- /* CPU mode initialization.*/
- reg = CRT0_CONTROL_INIT;
-#endif
- __asm volatile ("msr CONTROL, %0" : : "r" (reg));
- __asm volatile ("isb");
-
- /* Early initialization hook invocation.*/
- __early_init();
-
-#if CRT0_INIT_STACKS == TRUE
- /* Main and Process stacks initialization.*/
- fill32(&__main_stack_base__,
- &__main_stack_end__,
- (uint32_t)CRT0_STACKS_FILL_PATTERN);
- fill32(&__process_stack_base__,
- &__process_stack_end__,
- (uint32_t)CRT0_STACKS_FILL_PATTERN);
-#endif
-
-#if CRT0_INIT_DATA == TRUE
- /* DATA segment initialization.*/
- {
- uint32_t *tp, *dp;
-
- tp = &_textdata;
- dp = &_data;
- /*lint -save -e681 [2.1] Lint cannot see the scatter file symbols.*/
- while (dp < &_edata) {
- /*lint -restore*/
- *dp++ = *tp++;
- }
- }
-#endif
-
-#if CRT0_INIT_BSS == TRUE
- /* BSS segment initialization.*/
- fill32(&_bss_start, &_bss_end, 0);
-#endif
-
- /* Late initialization hook invocation.*/
- __late_init();
-
-#if CRT0_CALL_CONSTRUCTORS
- /* Constructors invocation.*/
- {
- funcpp_t fpp = &__init_array_start;
- /*lint -save -e681 [2.1] Lint cannot see the scatter file symbols.*/
- while (fpp < &__init_array_end) {
- /*lint -restore*/
- (*fpp)();
- fpp++;
- }
- }
-#endif
-
- /* Invoking application main() function.*/
- main();
-
-#if CRT0_CALL_DESTRUCTORS == TRUE
- /* Destructors invocation.*/
- {
- funcpp_t fpp = &__fini_array_start;
- /*lint -save -e681 [2.1] Lint cannot see the scatter file symbols.*/
- while (fpp < &__fini_array_end) {
- /*lint -restore*/
- (*fpp)();
- fpp++;
- }
- }
-#endif
-
- /* Invoking the exit handler.*/
- _default_exit();
-}
-
/** @} */
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