diff options
Diffstat (limited to 'os/common/startup/ARMCMx')
| -rw-r--r-- | os/common/startup/ARMCMx/compilers/GCC/crt0_v6m.S | 17 | ||||
| -rw-r--r-- | os/common/startup/ARMCMx/compilers/GCC/crt0_v7m.S | 16 |
2 files changed, 33 insertions, 0 deletions
diff --git a/os/common/startup/ARMCMx/compilers/GCC/crt0_v6m.S b/os/common/startup/ARMCMx/compilers/GCC/crt0_v6m.S index b313b611a..643783bc8 100644 --- a/os/common/startup/ARMCMx/compilers/GCC/crt0_v6m.S +++ b/os/common/startup/ARMCMx/compilers/GCC/crt0_v6m.S @@ -39,11 +39,22 @@ #define CONTROL_USE_MSP 0
#define CONTROL_USE_PSP 2
+#define SCB_VTOR 0xE000ED08
+
/*===========================================================================*/
/* Module pre-compile time settings. */
/*===========================================================================*/
/**
+ * @brief VTOR special register initialization.
+ * @details VTOR is initialized to point to the vectors table.
+ * @note This option can only be enabled on Cortex-M0+ cores.
+ */
+#if !defined(CRT0_VTOR_INIT) || defined(__DOXYGEN__)
+#define CRT0_VTOR_INIT FALSE
+#endif
+
+/**
* @brief Control special register initialization value.
* @details The system is setup to run in privileged mode using the PSP
* stack (dual stack mode).
@@ -140,6 +151,12 @@ Reset_Handler: msr CONTROL, r0
isb
+#if CRT0_VTOR_INIT == TRUE
+ ldr r0, =_vectors
+ ldr r1, =SCB_VTOR
+ str r0, [r1]
+#endif
+
#if CRT0_INIT_CORE == TRUE
/* Core initialization.*/
bl __core_init
diff --git a/os/common/startup/ARMCMx/compilers/GCC/crt0_v7m.S b/os/common/startup/ARMCMx/compilers/GCC/crt0_v7m.S index 5f9668efb..3abfc1813 100644 --- a/os/common/startup/ARMCMx/compilers/GCC/crt0_v7m.S +++ b/os/common/startup/ARMCMx/compilers/GCC/crt0_v7m.S @@ -43,6 +43,7 @@ #define FPCCR_ASPEN (1 << 31)
#define FPCCR_LSPEN (1 << 30)
+#define SCB_VTOR 0xE000ED08
#define SCB_CPACR 0xE000ED88
#define SCB_FPCCR 0xE000EF34
#define SCB_FPDSCR 0xE000EF3C
@@ -52,6 +53,14 @@ /*===========================================================================*/
/**
+ * @brief VTOR special register initialization.
+ * @details VTOR is initialized to point to the vectors table.
+ */
+#if !defined(CRT0_VTOR_INIT) || defined(__DOXYGEN__)
+#define CRT0_VTOR_INIT TRUE
+#endif
+
+/**
* @brief FPU initialization switch.
*/
#if !defined(CRT0_INIT_FPU) || defined(__DOXYGEN__)
@@ -175,6 +184,13 @@ Reset_Handler: ldr r0, =__process_stack_end__
msr PSP, r0
+#if CRT0_VTOR_INIT == TRUE
+ ldr r0, =_vectors
+ movw r1, #SCB_VTOR & 0xFFFF
+ movt r1, #SCB_VTOR >> 16
+ str r0, [r1]
+#endif
+
#if CRT0_INIT_FPU == TRUE
/* FPU FPCCR initialization.*/
movw r0, #CRT0_FPCCR_INIT & 0xFFFF
|