1 /*
2  * Copyright 2009 Freescale Semiconductor, Inc.
3  *
4  * See file CREDITS for list of people who contributed to this
5  * project.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License as
9  * published by the Free Software Foundation; either version 2 of
10  * the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20  * MA 02111-1307 USA
21  */
22 
23 #include <common.h>
24 #include <asm/processor.h>
25 #include <asm/global_data.h>
26 #include <asm/fsl_ifc.h>
27 #include <asm/io.h>
28 
29 DECLARE_GLOBAL_DATA_PTR;
30 
31 void cpu_init_f(void)
32 {
33 #ifdef CONFIG_SYS_INIT_L2_ADDR
34 	ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR;
35 
36 	out_be32(&l2cache->l2srbar0, CONFIG_SYS_INIT_L2_ADDR);
37 
38 	/* set MBECCDIS=1, SBECCDIS=1 */
39 	out_be32(&l2cache->l2errdis,
40 		(MPC85xx_L2ERRDIS_MBECC | MPC85xx_L2ERRDIS_SBECC));
41 
42 	/* set L2E=1 & L2SRAM=001 */
43 	out_be32(&l2cache->l2ctl,
44 		(MPC85xx_L2CTL_L2E | MPC85xx_L2CTL_L2SRAM_ENTIRE));
45 #endif
46 }
47 
48 #ifndef CONFIG_SYS_FSL_TBCLK_DIV
49 #define CONFIG_SYS_FSL_TBCLK_DIV 8
50 #endif
51 
52 void udelay(unsigned long usec)
53 {
54 	u32 ticks_per_usec = gd->bus_clk / (CONFIG_SYS_FSL_TBCLK_DIV * 1000000);
55 	u32 ticks = ticks_per_usec * usec;
56 	u32 s = mfspr(SPRN_TBRL);
57 
58 	while ((mfspr(SPRN_TBRL) - s) < ticks);
59 }
60