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/*
* (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_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;
ulong mfmask;
#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.
*/
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;
/*
* 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_ADDERII) || \
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_RPXCLASSIC) || \
defined(CONFIG_RPXLITE) || \
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
#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)
DECLARE_GLOBAL_DATA_PTR;
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);
}
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