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arch/arm/src/imxrt/imxrt_start.c: Clear CONTROL register at start to … #222

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Feb 13, 2024
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arch/arm/src/imxrt/imxrt_start.c: Clear CONTROL register at start to … #222

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7 changes: 6 additions & 1 deletion arch/arm/src/imxrt/imxrt_start.c
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Original file line number Diff line number Diff line change
Expand Up @@ -149,11 +149,16 @@ void __start(void)
const register uint32_t *src;
register uint32_t *dest;

/* Make sure that interrupts are disabled and set SP */
/* Make sure that interrupts are disabled and set MSP */

__asm__ __volatile__ ("\tcpsid i\n");
__asm__ __volatile__ ("MSR MSP, %0\n" : : "r" (IDLE_STACK) :);

/* Make sure that we use MSP from now on */

__asm__ __volatile__ ("MSR CONTROL, %0\n" : : "r" (0) :);
__asm__ __volatile__ ("ISB SY\n");

/* Make sure VECTAB is set to NuttX vector table
* and not the one from the boot ROM and have consistency
* with debugger that automatically set the VECTAB
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