[a1jatt]

shadowmite, jumpspl wont work anymore on tp2. may be it has something to do with the MPU may be? anyway, either you will have to fix jumpspl or do following steps manually.
1. copy spl in RAM.
2. mark that ram location executable.
3. disable MMU and scheduler.
4. jump to bootloader in the memory.

jumspl does the above steps for you.

the spl have to be patched for followoing checks.
1. patch RSA sign check function.
2. to make it "hard", patch spl to ignore spl header in rom image.
3. patch to ignore cid check.