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Diffstat (limited to 'cpu/mpc83xx/cpu_init.c')
| -rw-r--r-- | cpu/mpc83xx/cpu_init.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/cpu/mpc83xx/cpu_init.c b/cpu/mpc83xx/cpu_init.c new file mode 100644 index 000000000..7e80ced39 --- /dev/null +++ b/cpu/mpc83xx/cpu_init.c @@ -0,0 +1,164 @@ +/* + * Copyright 2004 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 + * + * Change log: + * + * 20050101: Eran Liberty (liberty@freescale.com) + * Initial file creating (porting from 85XX & 8260) + */ + +#include <common.h> +#include <mpc83xx.h> +#include <ioports.h> + +/* + * Breathe 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 * im) +{ + DECLARE_GLOBAL_DATA_PTR; + + /* Pointer is writable since we allocated a register for it */ + gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET); + + /* Clear initial global data */ + memset ((void *) gd, 0, sizeof (gd_t)); + + /* RSR - Reset Status Register - clear all status (4.6.1.3) */ + gd->reset_status = im->reset.rsr; + im->reset.rsr = ~(RSR_RES); + + /* + * RMR - Reset Mode Register + * contains checkstop reset enable (4.6.1.4) + */ + im->reset.rmr = (RMR_CSRE & (1<<RMR_CSRE_SHIFT)); + + /* LCRR - Clock Ratio Register (10.3.1.16) */ + im->lbus.lcrr = CFG_LCRR; + + /* Enable Time Base & Decrimenter ( so we will have udelay() )*/ + im->sysconf.spcr |= SPCR_TBEN; + + /* System General Purpose Register */ + im->sysconf.sicrh = SICRH_TSOBI1; + im->sysconf.sicrl = SICRL_LDP_A; + + /* + * Memory Controller: + */ + + /* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary + * addresses - these have to be modified later when FLASH size + * has been determined + */ + +#if defined(CFG_BR0_PRELIM) \ + && defined(CFG_OR0_PRELIM) \ + && defined(CFG_LBLAWBAR0_PRELIM) \ + && defined(CFG_LBLAWAR0_PRELIM) + im->lbus.bank[0].br = CFG_BR0_PRELIM; + im->lbus.bank[0].or = CFG_OR0_PRELIM; + im->sysconf.lblaw[0].bar = CFG_LBLAWBAR0_PRELIM; + im->sysconf.lblaw[0].ar = CFG_LBLAWAR0_PRELIM; +#else +#error CFG_BR0_PRELIM, CFG_OR0_PRELIM, CFG_LBLAWBAR0_PRELIM & CFG_LBLAWAR0_PRELIM must be defined +#endif + +#if defined(CFG_BR1_PRELIM) \ + && defined(CFG_OR1_PRELIM) \ + && defined(CFG_LBLAWBAR1_PRELIM) \ + && defined(CFG_LBLAWAR1_PRELIM) + im->lbus.bank[1].br = CFG_BR1_PRELIM; + im->lbus.bank[1].or = CFG_OR1_PRELIM; + im->sysconf.lblaw[1].bar = CFG_LBLAWBAR1_PRELIM; + im->sysconf.lblaw[1].ar = CFG_LBLAWAR1_PRELIM; +#endif +#if defined(CFG_BR2_PRELIM) \ + && defined(CFG_OR2_PRELIM) \ + && defined(CFG_LBLAWBAR2_PRELIM) \ + && defined(CFG_LBLAWAR2_PRELIM) + im->lbus.bank[2].br = CFG_BR2_PRELIM; + im->lbus.bank[2].or = CFG_OR2_PRELIM; + im->sysconf.lblaw[2].bar = CFG_LBLAWBAR2_PRELIM; + im->sysconf.lblaw[2].ar = CFG_LBLAWAR2_PRELIM; +#endif +#if defined(CFG_BR3_PRELIM) \ + && defined(CFG_OR3_PRELIM) \ + && defined(CFG_LBLAWBAR3_PRELIM) \ + && defined(CFG_LBLAWAR3_PRELIM) + im->lbus.bank[3].br = CFG_BR3_PRELIM; + im->lbus.bank[3].or = CFG_OR3_PRELIM; + im->sysconf.lblaw[3].bar = CFG_LBLAWBAR3_PRELIM; + im->sysconf.lblaw[3].ar = CFG_LBLAWAR3_PRELIM; +#endif +#if defined(CFG_BR4_PRELIM) \ + && defined(CFG_OR4_PRELIM) \ + && defined(CFG_LBLAWBAR4_PRELIM) \ + && defined(CFG_LBLAWAR4_PRELIM) + im->lbus.bank[4].br = CFG_BR4_PRELIM; + im->lbus.bank[4].or = CFG_OR4_PRELIM; + im->sysconf.lblaw[4].bar = CFG_LBLAWBAR4_PRELIM; + im->sysconf.lblaw[4].ar = CFG_LBLAWAR4_PRELIM; +#endif +#if defined(CFG_BR5_PRELIM) \ + && defined(CFG_OR5_PRELIM) \ + && defined(CFG_LBLAWBAR5_PRELIM) \ + && defined(CFG_LBLAWAR5_PRELIM) + im->lbus.bank[5].br = CFG_BR5_PRELIM; + im->lbus.bank[5].or = CFG_OR5_PRELIM; + im->sysconf.lblaw[5].bar = CFG_LBLAWBAR5_PRELIM; + im->sysconf.lblaw[5].ar = CFG_LBLAWAR5_PRELIM; +#endif +#if defined(CFG_BR6_PRELIM) \ + && defined(CFG_OR6_PRELIM) \ + && defined(CFG_LBLAWBAR6_PRELIM) \ + && defined(CFG_LBLAWAR6_PRELIM) + im->lbus.bank[6].br = CFG_BR6_PRELIM; + im->lbus.bank[6].or = CFG_OR6_PRELIM; + im->sysconf.lblaw[6].bar = CFG_LBLAWBAR6_PRELIM; + im->sysconf.lblaw[6].ar = CFG_LBLAWAR6_PRELIM; +#endif +#if defined(CFG_BR7_PRELIM) \ + && defined(CFG_OR7_PRELIM) \ + && defined(CFG_LBLAWBAR7_PRELIM) \ + && defined(CFG_LBLAWAR7_PRELIM) + im->lbus.bank[7].br = CFG_BR7_PRELIM; + im->lbus.bank[7].or = CFG_OR7_PRELIM; + im->sysconf.lblaw[7].bar = CFG_LBLAWBAR7_PRELIM; + im->sysconf.lblaw[7].ar = CFG_LBLAWAR7_PRELIM; +#endif +} + + +/* + * Initialize higher level parts of CPU like time base and timers. + */ + +int cpu_init_r (void) +{ + return 0; +} + |