2 * (C) Copyright 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch.
4 * SPDX-License-Identifier: GPL-2.0+
10 * Discription: Contains initialisation functions to setup
20 * Setup essential cpu registers to run
22 void cpu_init_f (volatile immap_t * immr)
24 volatile memctl5xx_t *memctl = &immr->im_memctl;
27 /* SYPCR - contains watchdog control. This will enable watchdog */
28 /* if CONFIG_WATCHDOG is set */
29 immr->im_siu_conf.sc_sypcr = CONFIG_SYS_SYPCR;
31 #if defined(CONFIG_WATCHDOG)
32 reset_5xx_watchdog (immr);
35 /* SIUMCR - contains debug pin configuration */
36 immr->im_siu_conf.sc_siumcr |= CONFIG_SYS_SIUMCR;
38 /* Initialize timebase. Unlock TBSCRK */
39 immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
40 immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR;
42 /* Full IMB bus speed */
43 immr->im_uimb.uimb_umcr = CONFIG_SYS_UMCR;
45 /* Time base and decrementer will be enables (TBE) */
46 /* in init_timebase() in time.c called from board_init_f(). */
48 /* Initialize the PIT. Unlock PISCRK */
49 immr->im_sitk.sitk_piscrk = KAPWR_KEY;
50 immr->im_sit.sit_piscr = CONFIG_SYS_PISCR;
52 #if !defined(CONFIG_PATI)
53 /* PATI sest PLL in start.S */
54 /* PLL (CPU clock) settings */
55 immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;
57 /* If CONFIG_SYS_PLPRCR (set in the various *_config.h files) tries to
58 * set the MF field, then just copy CONFIG_SYS_PLPRCR over car_plprcr,
59 * otherwise OR in CONFIG_SYS_PLPRCR so we do not change the currentMF
62 #if ((CONFIG_SYS_PLPRCR & PLPRCR_MF_MSK) != 0)
63 reg = CONFIG_SYS_PLPRCR; /* reset control bits */
65 reg = immr->im_clkrst.car_plprcr;
66 reg &= PLPRCR_MF_MSK; /* isolate MF field */
67 reg |= CONFIG_SYS_PLPRCR; /* reset control bits */
69 immr->im_clkrst.car_plprcr = reg;
71 #endif /* !defined(CONFIG_PATI) */
73 /* System integration timers. CONFIG_SYS_MASK has EBDF configuration */
74 immr->im_clkrstk.cark_sccrk = KAPWR_KEY;
75 reg = immr->im_clkrst.car_sccr;
77 reg |= CONFIG_SYS_SCCR;
78 immr->im_clkrst.car_sccr = reg;
80 /* Memory Controller */
81 memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
82 memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM;
84 #if (defined(CONFIG_SYS_OR1_PRELIM) && defined(CONFIG_SYS_BR1_PRELIM))
85 memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
86 memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
89 #if defined(CONFIG_SYS_OR2_PRELIM) && defined(CONFIG_SYS_BR2_PRELIM)
90 memctl->memc_or2 = CONFIG_SYS_OR2_PRELIM;
91 memctl->memc_br2 = CONFIG_SYS_BR2_PRELIM;
94 #if defined(CONFIG_SYS_OR3_PRELIM) && defined(CONFIG_SYS_BR3_PRELIM)
95 memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM;
96 memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM;
102 * Initialize higher level parts of cpu
104 int cpu_init_r (void)
106 /* Nothing to do at the moment */