/* * 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);}