/* * ppmc7xx.c * --------- * * Main board-specific routines for Wind River PPMC 7xx/74xx board. * * By Richard Danter (richard.danter@windriver.com) * Copyright (C) 2005 Wind River Systems */ #include <common.h> #include <command.h> /* Define some MPC107 (memory controller) registers */ #define MPC107_EUMB_GCR 0xfce41020 #define MPC107_EUMB_IACKR 0xfce600a0 /* Function prototypes */ extern void unlock_ram_in_cache( void ); extern void _start_warm(void); /* * initdram() * * This function normally initialises the (S)DRAM of the system. For this board * the SDRAM was already initialised by board_asm_init (see init.S) so we just * return the size of RAM. */ long initdram( int board_type ) { return CFG_SDRAM_SIZE; } /* * after_reloc() * * This is called after U-Boot has been copied from Flash/ROM to RAM. It gives * us an opportunity to do some additional setup before the rest of the system * is initialised. We don't need to do anything, so we just call board_init_r() * which should never return. */ void after_reloc( ulong dest_addr, gd_t* gd ) { /* Jump to the main U-Boot board init code */ board_init_r( gd, dest_addr ); } /* * checkboard() * * We could do some board level checks here, such as working out what version * it is, but for this board we simply display it's name (on the console). */ int checkboard( void ) { puts( "Board: Wind River PPMC 7xx/74xx\n" ); return 0; } /* * misc_init_r * * Used for other setup which needs to be done late in the bring-up phase. */ int misc_init_r( void ) { /* Reset the EPIC and clear pending interrupts */ out32r(MPC107_EUMB_GCR, 0xa0000000); while( in32r( MPC107_EUMB_GCR ) & 0x80000000 ); out32r( MPC107_EUMB_GCR, 0x20000000 ); while( in32r( MPC107_EUMB_IACKR ) != 0xff ); /* Enable the I-Cache */ icache_enable(); return 0; } /* * do_reset() * * Shell command to reset the board. */ void do_reset( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] ) { printf( "Resetting...\n" ); /* Disabe and invalidate cache */ icache_disable(); dcache_disable(); /* Jump to warm start (in RAM) */ _start_warm(); /* Should never get here */ while(1); }