mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-02 17:41:08 +00:00
104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/*
|
|
* 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);
|
|
}
|