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IOCTL HAL GETBOOTFLAGS

 

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This IOCTL returns the Fail Safe Boot status and the reset reason bits. This feature is available since Toradex WinCE BSP V3.6:

Define

#define     IOCTL_HAL_GETBOOTFLAGS   CTL_CODE(FILE_DEVICE_HAL, 2123, METHOD_BUFFERED, FILE_ANY_ACCESS)

C source code sample

DWORD bootFlags;
KernelIoControl(IOCTL_HAL_GETBOOTFLAGS, NULL, 0, &bootFlags, sizeof(DWORD), NULL);
 
BootFlags format:
// BootFlags States
#define BF_BL                          (1<< 0)   // Normal Bootloader boot (fail safe feature disabled)
#define BF_FSBL_FIRST                  (1<< 1)   // First failSafe Bootloader boot (this will never happen)
#define BF_FSBL_FIRST_FAILSAFE         (1<< 2)   // First failSafe Bootloader booted because second FS bootloader failed
#define BF_FSBL_SECOND                 (1<< 3)   // Second failSafe Bootloader booted (normal behavior if fail safe feature enabled)
 
// BootFlags Error Flags
#define BF_BL_ERROR                    (1<< 4)   // Normal Bootloader Error (fail safe feature disabled)
#define BF_FSBL_FIRST_ERROR            (1<< 5)   // First failSafe Bootloader Error (this is a critical error)
#define BF_FSBL_SECOND_ERROR           (1<< 6)   // Second failSafe Bootloader Error
 
// Reset Reason Bits
#define RR_POWERUP                     (1<< 16)  // Boot due to Power-up or HW-Reset
#define RR_WATCHDOG                    (1<< 17)  // Boot due to Watchdog-Reset
#define RR_LOWPWR_EXIT                 (1<< 18)  // Boot due to Low-Power-Exit (this bit is not supported)
#define RR_GPIO                        (1<< 19)  // Boot due to GPIO-Reset