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1 /*
2  * (C) Copyright 2003  Martin Winistoerfer, martinwinistoerfer@gmx.ch.
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 /*
8  * File:                cpu_init.c
9  *
10  * Discription:         Contains initialisation functions to setup
11  *                      the cpu properly
12  *
13  */
14
15 #include <common.h>
16 #include <mpc5xx.h>
17 #include <watchdog.h>
18
19 /*
20  * Setup essential cpu registers to run
21  */
22 void cpu_init_f (volatile immap_t * immr)
23 {
24         volatile memctl5xx_t *memctl = &immr->im_memctl;
25         ulong reg;
26
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;
30
31 #if defined(CONFIG_WATCHDOG)
32         reset_5xx_watchdog (immr);
33 #endif
34
35         /* SIUMCR - contains debug pin configuration */
36         immr->im_siu_conf.sc_siumcr |= CONFIG_SYS_SIUMCR;
37
38         /* Initialize timebase. Unlock TBSCRK */
39         immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
40         immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR;
41
42         /* Full IMB bus speed */
43         immr->im_uimb.uimb_umcr = CONFIG_SYS_UMCR;
44
45         /* Time base and decrementer will be enables (TBE) */
46         /* in init_timebase() in time.c called from board_init_f(). */
47
48         /* Initialize the PIT. Unlock PISCRK */
49         immr->im_sitk.sitk_piscrk = KAPWR_KEY;
50         immr->im_sit.sit_piscr = CONFIG_SYS_PISCR;
51
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;
56
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
60          * field value.
61          */
62 #if ((CONFIG_SYS_PLPRCR & PLPRCR_MF_MSK) != 0)
63         reg = CONFIG_SYS_PLPRCR;                        /* reset control bits   */
64 #else
65         reg = immr->im_clkrst.car_plprcr;
66         reg &= PLPRCR_MF_MSK;                   /* isolate MF field */
67         reg |= CONFIG_SYS_PLPRCR;                       /* reset control bits   */
68 #endif
69         immr->im_clkrst.car_plprcr = reg;
70
71 #endif /* !defined(CONFIG_PATI) */
72
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;
76         reg &= SCCR_MASK;
77         reg |= CONFIG_SYS_SCCR;
78         immr->im_clkrst.car_sccr = reg;
79
80         /* Memory Controller */
81         memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
82         memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM;
83
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;
87 #endif
88
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;
92 #endif
93
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;
97 #endif
98
99 }
100
101 /*
102  * Initialize higher level parts of cpu
103  */
104 int cpu_init_r (void)
105 {
106         /* Nothing to do at the moment */
107         return (0);
108 }