diff options
Diffstat (limited to 'cpu/mpc85xx/cpu_init.c')
| -rw-r--r-- | cpu/mpc85xx/cpu_init.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/cpu/mpc85xx/cpu_init.c b/cpu/mpc85xx/cpu_init.c new file mode 100644 index 000000000..3ffd55880 --- /dev/null +++ b/cpu/mpc85xx/cpu_init.c @@ -0,0 +1,205 @@ +/* + * (C) Copyright 2003 Motorola Inc. + * Modified by Xianghua Xiao, X.Xiao@motorola.com + * + * (C) Copyright 2000 + * 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 <asm/processor.h> +#include <ioports.h> +#include <asm/io.h> + +#ifdef CONFIG_MPC8560 +static void config_8560_ioports (volatile immap_t * immr) +{ + int portnum; + + for (portnum = 0; portnum < 4; portnum++) { + uint pmsk = 0, + ppar = 0, + psor = 0, + pdir = 0, + podr = 0, + pdat = 0; + iop_conf_t *iopc = (iop_conf_t *) & iop_conf_tab[portnum][0]; + iop_conf_t *eiopc = iopc + 32; + uint msk = 1; + + /* + * NOTE: + * index 0 refers to pin 31, + * index 31 refers to pin 0 + */ + while (iopc < eiopc) { + if (iopc->conf) { + pmsk |= msk; + if (iopc->ppar) + ppar |= msk; + if (iopc->psor) + psor |= msk; + if (iopc->pdir) + pdir |= msk; + if (iopc->podr) + podr |= msk; + if (iopc->pdat) + pdat |= msk; + } + + msk <<= 1; + iopc++; + } + + if (pmsk != 0) { + volatile ioport_t *iop = ioport_addr (immr, portnum); + uint tpmsk = ~pmsk; + + /* + * the (somewhat confused) paragraph at the + * bottom of page 35-5 warns that there might + * be "unknown behaviour" when programming + * PSORx and PDIRx, if PPARx = 1, so I + * decided this meant I had to disable the + * dedicated function first, and enable it + * last. + */ + iop->ppar &= tpmsk; + iop->psor = (iop->psor & tpmsk) | psor; + iop->podr = (iop->podr & tpmsk) | podr; + iop->pdat = (iop->pdat & tpmsk) | pdat; + iop->pdir = (iop->pdir & tpmsk) | pdir; + iop->ppar |= ppar; + } + } +} +#endif + +/* + * 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; + extern void m8560_cpm_reset (void); + + /* 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)); + + +#ifdef CONFIG_MPC8560 + config_8560_ioports(immap); +#endif + + /* 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(CONFIG_MPC85xx) +#if defined(CFG_BR2_PRELIM) && defined(CFG_OR2_PRELIM) + memctl->or2 = CFG_OR2_PRELIM; + memctl->br2 = CFG_BR2_PRELIM; +#endif +#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 + +#if defined(CONFIG_MPC8560) + m8560_cpm_reset(); +#endif +} + +/* + * We initialize L2 as cache here. + */ +int cpu_init_r (void) +{ +#if defined(CONFIG_L2_CACHE) + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile ccsr_l2cache_t *l2cache = &immap->im_l2cache; + volatile uint temp; + + asm("msync;isync"); + l2cache->l2ctl = 0x68000000; /* invalidate */ + temp = l2cache->l2ctl; + asm("msync;isync"); + l2cache->l2ctl = 0xa8000000; /* enable 256KB L2 cache */ + temp = l2cache->l2ctl; + asm("msync;isync"); + + printf("L2 cache enabled: 256KB\n"); +#else + printf("L2 cache disabled.\n"); +#endif + + return 0; +} |