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