board/ppmc7xx/ppmc7xx.c

   1 /*
   2  * ppmc7xx.c
   3  * ---------
   4  *
   5  * Main board-specific routines for Wind River PPMC 7xx/74xx board.
   6  *
   7  * By Richard Danter (richard.danter@windriver.com)
   8  * Copyright (C) 2005 Wind River Systems
   9  */
  10
  11 #include <common.h>
  12 #include <command.h>
  13 #include <netdev.h>
  14
  15
  16 /* Define some MPC107 (memory controller) registers */
  17 #define MPC107_EUMB_GCR         0xfce41020
  18 #define MPC107_EUMB_IACKR       0xfce600a0
  19
  20
  21 /* Function prototypes */
  22 extern void unlock_ram_in_cache( void );
  23 extern void _start_warm(void);
  24
  25
  26 /*
  27  * initdram()
  28  *
  29  * This function normally initialises the (S)DRAM of the system. For this board
  30  * the SDRAM was already initialised by board_asm_init (see init.S) so we just
  31  * return the size of RAM.
  32  */
  33 phys_size_t initdram( int board_type )
  34 {
  35     return CONFIG_SYS_SDRAM_SIZE;
  36 }
  37
  38
  39 /*
  40  * after_reloc()
  41  *
  42  * This is called after U-Boot has been copied from Flash/ROM to RAM. It gives
  43  * us an opportunity to do some additional setup before the rest of the system
  44  * is initialised. We don't need to do anything, so we just call board_init_r()
  45  * which should never return.
  46  */
  47 void after_reloc( ulong dest_addr, gd_t* gd )
  48 {
  49         /* Jump to the main U-Boot board init code */
  50         board_init_r( gd, dest_addr );
  51 }
  52
  53
  54 /*
  55  * checkboard()
  56  *
  57  * We could do some board level checks here, such as working out what version
  58  * it is, but for this board we simply display it's name (on the console).
  59  */
  60 int checkboard( void )
  61 {
  62     puts( "Board: Wind River PPMC 7xx/74xx\n" );
  63     return 0;
  64 }
  65
  66
  67 /*
  68  * misc_init_r
  69  *
  70  * Used for other setup which needs to be done late in the bring-up phase.
  71  */
  72 int misc_init_r( void )
  73 {
  74         /* Reset the EPIC and clear pending interrupts */
  75         out32r(MPC107_EUMB_GCR, 0xa0000000);
  76         while( in32r( MPC107_EUMB_GCR ) & 0x80000000 );
  77         out32r( MPC107_EUMB_GCR, 0x20000000 );
  78         while( in32r( MPC107_EUMB_IACKR ) != 0xff );
  79
  80         /* Enable the I-Cache */
  81         icache_enable();
  82
  83         return 0;
  84 }
  85
  86
  87 /*
  88  * do_reset()
  89  *
  90  * Shell command to reset the board.
  91  */
  92 void do_reset( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
  93 {
  94         printf( "Resetting...\n" );
  95
  96         /* Disabe and invalidate cache */
  97         icache_disable();
  98         dcache_disable();
  99
 100         /* Jump to warm start (in RAM) */
 101         _start_warm();
 102
 103         /* Should never get here */
 104         while(1);
 105 }
 106
 107 int board_eth_init(bd_t *bis)
 108 {
 109         return pci_eth_init(bis);
 110 }