I am a complete beginner to embedded systems.
I started with lpc2129 and have done few programs on different things.
Although user manual gives description about vectored and non vectored interrupts,
There is no info on FIQ.
Arm documentation says __irq address should be placed at 0x0000001C.
F_BIT address 0x40
But startup code says to reset the F_BIT to enable FIQ mode.
Also some changes should be done in trustzone.
If someone can explain this?
I am really sorry for asking a basic thing but im from cs background and new to embedded.