i want to access extended rom area (0x70000000) in mpc8245 sandpoint board (ARTis Microsystems A-3000) i tried to reallocate BAT1(initial stack area ) 0x40000000 to 0x70000000 but board was hang... i wrote BAT1 reallocation function and call BAT1 reallocation function in board.c ( board_init_r () )
void move_bat1 (void) { mtspr (IBAT1L, (0x70000000 | BATL_PP_10 | BATL_CACHEINHIBIT)); mtspr (IBAT1U, (0x70000000 | BATU_BL_256M | BATU_VS | BATU_VP));
mtspr (DBAT1L, (0x70000000 | BATL_PP_10 | BATL_CACHEINHIBIT)); mtspr (DBAT1U, (0x70000000 | BATU_BL_256M | BATU_VS | BATU_VP)); __asm__ __volatile__("eieio"); __asm__ __volatile__("isync"); __asm__ __volatile__("sync");
}
i think ram use stack at this function so 0x40000000 nerver accessed
what's wrong... :-((
^^ best regard~~