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/*
* (C) Copyright 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* File: cpu_init.c
*
* Discription: Contains initialisation functions to setup
* the cpu properly
*
*/
#include <common.h>
#include <mpc5xx.h>
#include <watchdog.h>
/*
* Setup essential cpu registers to run
*/
void cpu_init_f (volatile immap_t * immr)
{
volatile memctl5xx_t *memctl = &immr->im_memctl;
ulong reg;
/* SYPCR - contains watchdog control. This will enable watchdog */
/* if CONFIG_WATCHDOG is set */
immr->im_siu_conf.sc_sypcr = CONFIG_SYS_SYPCR;
#if defined(CONFIG_WATCHDOG)
reset_5xx_watchdog (immr);
#endif
/* SIUMCR - contains debug pin configuration */
immr->im_siu_conf.sc_siumcr |= CONFIG_SYS_SIUMCR;
/* Initialize timebase. Unlock TBSCRK */
immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR;
/* Full IMB bus speed */
immr->im_uimb.uimb_umcr = CONFIG_SYS_UMCR;
/* Time base and decrementer will be enables (TBE) */
/* in timer_init() in time.c called from board_init_f(). */
/* Initialize the PIT. Unlock PISCRK */
immr->im_sitk.sitk_piscrk = KAPWR_KEY;
immr->im_sit.sit_piscr = CONFIG_SYS_PISCR;
#if !defined(CONFIG_PATI)
/* PATI sest PLL in start.S */
/* PLL (CPU clock) settings */
immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;
/* If CONFIG_SYS_PLPRCR (set in the various *_config.h files) tries to
* set the MF field, then just copy CONFIG_SYS_PLPRCR over car_plprcr,
* otherwise OR in CONFIG_SYS_PLPRCR so we do not change the currentMF
* field value.
*/
#if ((CONFIG_SYS_PLPRCR & PLPRCR_MF_MSK) != 0)
reg = CONFIG_SYS_PLPRCR; /* reset control bits */
#else
reg = immr->im_clkrst.car_plprcr;
reg &= PLPRCR_MF_MSK; /* isolate MF field */
reg |= CONFIG_SYS_PLPRCR; /* reset control bits */
#endif
immr->im_clkrst.car_plprcr = reg;
#endif /* !defined(CONFIG_PATI) */
/* System integration timers. CONFIG_SYS_MASK has EBDF configuration */
immr->im_clkrstk.cark_sccrk = KAPWR_KEY;
reg = immr->im_clkrst.car_sccr;
reg &= SCCR_MASK;
reg |= CONFIG_SYS_SCCR;
immr->im_clkrst.car_sccr = reg;
/* Memory Controller */
memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM;
#if (defined(CONFIG_SYS_OR1_PRELIM) && defined(CONFIG_SYS_BR1_PRELIM))
memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
#endif
#if defined(CONFIG_SYS_OR2_PRELIM) && defined(CONFIG_SYS_BR2_PRELIM)
memctl->memc_or2 = CONFIG_SYS_OR2_PRELIM;
memctl->memc_br2 = CONFIG_SYS_BR2_PRELIM;
#endif
#if defined(CONFIG_SYS_OR3_PRELIM) && defined(CONFIG_SYS_BR3_PRELIM)
memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM;
memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM;
#endif
}
/*
* Initialize higher level parts of cpu
*/
int cpu_init_r (void)
{
/* Nothing to do at the moment */
return (0);
}
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