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ppc/85xx: add cpu init config file for boot from NAND 

When boot from NAND, the NAND flash must be connected to br/or0.
Also init RAM(L2 SRAM or DDR SDRAM) for load the second image to
it.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Mingkai Hu 2009-09-22 14:53:21 +08:00 committed by Kumar Gala
parent 266139b88b
commit 234a89d911
1 changed files with 63 additions and 0 deletions
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63
cpu/mpc85xx/cpu_init_nand.c Normal file
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/*
* Copyright 2009 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
void cpu_init_f(void)
{
ccsr_lbc_t *lbc = (void *)(CONFIG_SYS_MPC85xx_LBC_ADDR);
/*
* LCRR - Clock Ratio Register - set up local bus timing
* when needed
*/
out_be32(&lbc->lcrr, LCRR_DBYP | LCRR_CLKDIV_8);
#if defined(CONFIG_NAND_BR_PRELIM) && defined(CONFIG_NAND_OR_PRELIM)
out_be32(&lbc->br0, CONFIG_NAND_BR_PRELIM);
out_be32(&lbc->or0, CONFIG_NAND_OR_PRELIM);
#else
#error CONFIG_NAND_BR_PRELIM, CONFIG_NAND_OR_PRELIM must be defined
#endif
#if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L2_ADDR)
ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR;
char *l2srbar;
int i;
out_be32(&l2cache->l2srbar0, CONFIG_SYS_INIT_L2_ADDR);
/* set MBECCDIS=1, SBECCDIS=1 */
out_be32(&l2cache->l2errdis,
(MPC85xx_L2ERRDIS_MBECC | MPC85xx_L2ERRDIS_SBECC));
/* set L2E=1 & L2SRAM=001 */
out_be32(&l2cache->l2ctl,
(MPC85xx_L2CTL_L2E | MPC85xx_L2CTL_L2SRAM_ENTIRE));
/* Initialize L2 SRAM to zero */
l2srbar = (char *)CONFIG_SYS_INIT_L2_ADDR;
for (i = 0; i < CONFIG_SYS_L2_SIZE; i++)
l2srbar[i] = 0;
#endif
}