/* * (C) Copyright 2000-2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * 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 <watchdog.h> #include <mpc8xx.h> #include <commproc.h> #if defined(CFG_RTCSC) || defined(CFG_RMDS) DECLARE_GLOBAL_DATA_PTR; #endif #if defined(CFG_I2C_UCODE_PATCH) || defined(CFG_SPI_UCODE_PATCH) void cpm_load_patch (volatile immap_t * immr); #endif /* * Breath some life into the CPU... * * Set up the memory map, * initialize a bunch of registers, * initialize the UPM's */ void cpu_init_f (volatile immap_t * immr) { #ifndef CONFIG_MBX volatile memctl8xx_t *memctl = &immr->im_memctl; # ifdef CFG_PLPRCR ulong mfmask; # endif #endif ulong reg; /* SYPCR - contains watchdog control (11-9) */ immr->im_siu_conf.sc_sypcr = CFG_SYPCR; #if defined(CONFIG_WATCHDOG) reset_8xx_watchdog (immr); #endif /* CONFIG_WATCHDOG */ /* SIUMCR - contains debug pin configuration (11-6) */ #ifndef CONFIG_SVM_SC8xx immr->im_siu_conf.sc_siumcr |= CFG_SIUMCR; #else immr->im_siu_conf.sc_siumcr = CFG_SIUMCR; #endif /* initialize timebase status and control register (11-26) */ /* unlock TBSCRK */ immr->im_sitk.sitk_tbscrk = KAPWR_KEY; immr->im_sit.sit_tbscr = CFG_TBSCR; /* initialize the PIT (11-31) */ immr->im_sitk.sitk_piscrk = KAPWR_KEY; immr->im_sit.sit_piscr = CFG_PISCR; /* System integration timers. Don't change EBDF! (15-27) */ immr->im_clkrstk.cark_sccrk = KAPWR_KEY; reg = immr->im_clkrst.car_sccr; reg &= SCCR_MASK; reg |= CFG_SCCR; immr->im_clkrst.car_sccr = reg; /* PLL (CPU clock) settings (15-30) */ immr->im_clkrstk.cark_plprcrk = KAPWR_KEY; #ifndef CONFIG_MBX /* MBX board does things different */ /* If CFG_PLPRCR (set in the various *_config.h files) tries to * set the MF field, then just copy CFG_PLPRCR over car_plprcr, * otherwise OR in CFG_PLPRCR so we do not change the current MF * field value. * * For newer (starting MPC866) chips PLPRCR layout is different. */ #ifdef CFG_PLPRCR if (get_immr(0xFFFF) >= MPC8xx_NEW_CLK) mfmask = PLPRCR_MFACT_MSK; else mfmask = PLPRCR_MF_MSK; if ((CFG_PLPRCR & mfmask) != 0) reg = CFG_PLPRCR; /* reset control bits */ else { reg = immr->im_clkrst.car_plprcr; reg &= mfmask; /* isolate MF-related fields */ reg |= CFG_PLPRCR; /* reset control bits */ } immr->im_clkrst.car_plprcr = reg; #endif /* * Memory Controller: */ /* perform BR0 reset that MPC850 Rev. A can't guarantee */ reg = memctl->memc_br0; reg &= BR_PS_MSK; /* Clear everything except Port Size bits */ reg |= BR_V; /* then add just the "Bank Valid" bit */ memctl->memc_br0 = reg; /* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at * preliminary addresses - these have to be modified later * when FLASH size has been determined * * Depending on the size of the memory region defined by * CFG_OR0_REMAP some boards (wide address mask) allow to map the * CFG_MONITOR_BASE, while others (narrower address mask) can't * map CFG_MONITOR_BASE. * * For example, for CONFIG_IVMS8, the CFG_MONITOR_BASE is * 0xff000000, but CFG_OR0_REMAP's address mask is 0xfff80000. * * If BR0 wasn't loaded with address base 0xff000000, then BR0's * base address remains as 0x00000000. However, the address mask * have been narrowed to 512Kb, so CFG_MONITOR_BASE wasn't mapped * into the Bank0. * * This is why CONFIG_IVMS8 and similar boards must load BR0 with * CFG_BR0_PRELIM in advance. * * [Thanks to Michael Liao for this explanation. * I owe him a free beer. - wd] */ #if defined(CONFIG_GTH) || \ defined(CONFIG_HERMES) || \ defined(CONFIG_ICU862) || \ defined(CONFIG_IP860) || \ defined(CONFIG_IVML24) || \ defined(CONFIG_IVMS8) || \ defined(CONFIG_LWMON) || \ defined(CONFIG_MHPC) || \ defined(CONFIG_PCU_E) || \ defined(CONFIG_R360MPI) || \ defined(CONFIG_RMU) || \ defined(CONFIG_RPXCLASSIC) || \ defined(CONFIG_RPXLITE) || \ defined(CONFIG_SPC1920) || \ defined(CONFIG_SPD823TS) memctl->memc_br0 = CFG_BR0_PRELIM; #endif #if defined(CFG_OR0_REMAP) memctl->memc_or0 = CFG_OR0_REMAP; #endif #if defined(CFG_OR1_REMAP) memctl->memc_or1 = CFG_OR1_REMAP; #endif #if defined(CFG_OR5_REMAP) memctl->memc_or5 = CFG_OR5_REMAP; #endif /* now restrict to preliminary range */ memctl->memc_br0 = CFG_BR0_PRELIM; memctl->memc_or0 = CFG_OR0_PRELIM; #if (defined(CFG_OR1_PRELIM) && defined(CFG_BR1_PRELIM)) memctl->memc_or1 = CFG_OR1_PRELIM; memctl->memc_br1 = CFG_BR1_PRELIM; #endif #if defined(CONFIG_IP860) /* disable CS0 now that Flash is mapped on CS1 */ memctl->memc_br0 = 0; #endif #if defined(CFG_OR2_PRELIM) && defined(CFG_BR2_PRELIM) memctl->memc_or2 = CFG_OR2_PRELIM; memctl->memc_br2 = CFG_BR2_PRELIM; #endif #if defined(CFG_OR3_PRELIM) && defined(CFG_BR3_PRELIM) memctl->memc_or3 = CFG_OR3_PRELIM; memctl->memc_br3 = CFG_BR3_PRELIM; #endif #if defined(CFG_OR4_PRELIM) && defined(CFG_BR4_PRELIM) memctl->memc_or4 = CFG_OR4_PRELIM; memctl->memc_br4 = CFG_BR4_PRELIM; #endif #if defined(CFG_OR5_PRELIM) && defined(CFG_BR5_PRELIM) memctl->memc_or5 = CFG_OR5_PRELIM; memctl->memc_br5 = CFG_BR5_PRELIM; #endif #if defined(CFG_OR6_PRELIM) && defined(CFG_BR6_PRELIM) memctl->memc_or6 = CFG_OR6_PRELIM; memctl->memc_br6 = CFG_BR6_PRELIM; #endif #if defined(CFG_OR7_PRELIM) && defined(CFG_BR7_PRELIM) memctl->memc_or7 = CFG_OR7_PRELIM; memctl->memc_br7 = CFG_BR7_PRELIM; #endif #endif /* ! CONFIG_MBX */ /* * Reset CPM */ immr->im_cpm.cp_cpcr = CPM_CR_RST | CPM_CR_FLG; do { /* Spin until command processed */ __asm__ ("eieio"); } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG); #ifdef CONFIG_MBX /* * on the MBX, things are a little bit different: * - we need to read the VPD to get board information * - the plprcr is set up dynamically * - the memory controller is set up dynamically */ mbx_init (); #endif /* CONFIG_MBX */ #ifdef CONFIG_RPXCLASSIC rpxclassic_init (); #endif #if defined(CONFIG_RPXLITE) && defined(CFG_ENV_IS_IN_NVRAM) rpxlite_init (); #endif #ifdef CFG_RCCR /* must be done before cpm_load_patch() */ /* write config value */ immr->im_cpm.cp_rccr = CFG_RCCR; #endif #if defined(CFG_I2C_UCODE_PATCH) || defined(CFG_SPI_UCODE_PATCH) cpm_load_patch (immr); /* load mpc8xx microcode patch */ #endif } /* * initialize higher level parts of CPU like timers */ int cpu_init_r (void) { #if defined(CFG_RTCSC) || defined(CFG_RMDS) bd_t *bd = gd->bd; volatile immap_t *immr = (volatile immap_t *) (bd->bi_immr_base); #endif #ifdef CFG_RTCSC /* Unlock RTSC register */ immr->im_sitk.sitk_rtcsck = KAPWR_KEY; /* write config value */ immr->im_sit.sit_rtcsc = CFG_RTCSC; #endif #ifdef CFG_RMDS /* write config value */ immr->im_cpm.cp_rmds = CFG_RMDS; #endif return (0); }