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https://github.com/AsahiLinux/u-boot
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9973e3c614
This patch changes the return type of initdram() from long int to phys_size_t. This is required for a couple of reasons: long int limits the amount of dram to 2GB, and u-boot in general is moving over to phys_size_t to represent the size of physical memory. phys_size_t is defined as an unsigned long on almost all current platforms. This patch *only* changes the return type of the initdram function (in include/common.h, as well as in each board's implementation of initdram). It does not actually modify the code inside the function on any of the platforms; platforms which wish to support more than 2GB of DRAM will need to modify their initdram() function code. Build tested with MAKEALL for ppc, arm, mips, mips-el. Booted on powerpc MPC8641HPCN. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/*
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* ppmc7xx.c
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* ---------
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*
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* Main board-specific routines for Wind River PPMC 7xx/74xx board.
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*
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* By Richard Danter (richard.danter@windriver.com)
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* Copyright (C) 2005 Wind River Systems
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*/
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#include <common.h>
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#include <command.h>
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/* Define some MPC107 (memory controller) registers */
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#define MPC107_EUMB_GCR 0xfce41020
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#define MPC107_EUMB_IACKR 0xfce600a0
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/* Function prototypes */
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extern void unlock_ram_in_cache( void );
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extern void _start_warm(void);
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/*
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* initdram()
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*
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* This function normally initialises the (S)DRAM of the system. For this board
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* the SDRAM was already initialised by board_asm_init (see init.S) so we just
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* return the size of RAM.
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*/
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phys_size_t initdram( int board_type )
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{
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return CFG_SDRAM_SIZE;
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}
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/*
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* after_reloc()
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*
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* This is called after U-Boot has been copied from Flash/ROM to RAM. It gives
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* us an opportunity to do some additional setup before the rest of the system
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* is initialised. We don't need to do anything, so we just call board_init_r()
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* which should never return.
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*/
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void after_reloc( ulong dest_addr, gd_t* gd )
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{
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/* Jump to the main U-Boot board init code */
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board_init_r( gd, dest_addr );
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}
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/*
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* checkboard()
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*
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* We could do some board level checks here, such as working out what version
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* it is, but for this board we simply display it's name (on the console).
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*/
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int checkboard( void )
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{
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puts( "Board: Wind River PPMC 7xx/74xx\n" );
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return 0;
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}
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/*
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* misc_init_r
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*
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* Used for other setup which needs to be done late in the bring-up phase.
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*/
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int misc_init_r( void )
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{
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/* Reset the EPIC and clear pending interrupts */
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out32r(MPC107_EUMB_GCR, 0xa0000000);
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while( in32r( MPC107_EUMB_GCR ) & 0x80000000 );
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out32r( MPC107_EUMB_GCR, 0x20000000 );
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while( in32r( MPC107_EUMB_IACKR ) != 0xff );
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/* Enable the I-Cache */
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icache_enable();
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return 0;
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}
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/*
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* do_reset()
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*
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* Shell command to reset the board.
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*/
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void do_reset( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
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{
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printf( "Resetting...\n" );
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/* Disabe and invalidate cache */
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icache_disable();
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dcache_disable();
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/* Jump to warm start (in RAM) */
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_start_warm();
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/* Should never get here */
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while(1);
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}
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