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Diffstat (limited to 'cpu/mpc86xx/cpu_init.c')
| -rw-r--r-- | cpu/mpc86xx/cpu_init.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/cpu/mpc86xx/cpu_init.c b/cpu/mpc86xx/cpu_init.c new file mode 100644 index 0000000000..4673d05e71 --- /dev/null +++ b/cpu/mpc86xx/cpu_init.c @@ -0,0 +1,117 @@ +/* + * Copyright 2004 Freescale Semiconductor. + * Jeff Brown + * Srikanth Srinivasan (srikanth.srinivasan@freescale.com) + * + * 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 + */ + +/* + * cpu_init.c - low level cpu init + */ + +#include <common.h> +#include <mpc86xx.h> + +/* + * Breathe some life into the CPU... + * + * Set up the memory map + * initialize a bunch of registers + */ + +void cpu_init_f(void) +{ + DECLARE_GLOBAL_DATA_PTR; + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile ccsr_lbc_t *memctl = &immap->im_lbc; + + /* 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)); + + /* 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_OR0_REMAP) + memctl->or0 = CFG_OR0_REMAP; +#endif +#if defined(CFG_OR1_REMAP) + memctl->or1 = CFG_OR1_REMAP; +#endif + + /* now restrict to preliminary range */ +#if defined(CFG_BR0_PRELIM) && defined(CFG_OR0_PRELIM) + memctl->br0 = CFG_BR0_PRELIM; + memctl->or0 = CFG_OR0_PRELIM; +#endif + +#if defined(CFG_BR1_PRELIM) && defined(CFG_OR1_PRELIM) + memctl->or1 = CFG_OR1_PRELIM; + memctl->br1 = CFG_BR1_PRELIM; +#endif + +#if defined(CFG_BR2_PRELIM) && defined(CFG_OR2_PRELIM) + memctl->or2 = CFG_OR2_PRELIM; + memctl->br2 = CFG_BR2_PRELIM; +#endif + +#if defined(CFG_BR3_PRELIM) && defined(CFG_OR3_PRELIM) + memctl->or3 = CFG_OR3_PRELIM; + memctl->br3 = CFG_BR3_PRELIM; +#endif + +#if defined(CFG_BR4_PRELIM) && defined(CFG_OR4_PRELIM) + memctl->or4 = CFG_OR4_PRELIM; + memctl->br4 = CFG_BR4_PRELIM; +#endif + +#if defined(CFG_BR5_PRELIM) && defined(CFG_OR5_PRELIM) + memctl->or5 = CFG_OR5_PRELIM; + memctl->br5 = CFG_BR5_PRELIM; +#endif + +#if defined(CFG_BR6_PRELIM) && defined(CFG_OR6_PRELIM) + memctl->or6 = CFG_OR6_PRELIM; + memctl->br6 = CFG_BR6_PRELIM; +#endif + +#if defined(CFG_BR7_PRELIM) && defined(CFG_OR7_PRELIM) + memctl->or7 = CFG_OR7_PRELIM; + memctl->br7 = CFG_BR7_PRELIM; +#endif + + /* enable the timebase bit in HID0 */ + set_hid0(get_hid0() | 0x4000000); + + /* enable SYNCBE | ABE bits in HID1 */ + set_hid1(get_hid1() | 0x00000C00); +} + +/* + * initialize higher level parts of CPU like timers + */ +int cpu_init_r(void) +{ + return 0; +} |