Newer
Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <watchdog.h>
#include <mpc8xx.h>
#include <commproc.h>
/*
* 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)
{
volatile memctl8xx_t *memctl = &immr->im_memctl;
# ifdef CONFIG_SYS_PLPRCR
ulong mfmask;
# endif
ulong reg;
/* SYPCR - contains watchdog control (11-9) */
immr->im_siu_conf.sc_sypcr = CONFIG_SYS_SYPCR;
#if defined(CONFIG_WATCHDOG)
reset_8xx_watchdog (immr);
#endif /* CONFIG_WATCHDOG */
/* SIUMCR - contains debug pin configuration (11-6) */
immr->im_siu_conf.sc_siumcr |= CONFIG_SYS_SIUMCR;
/* initialize timebase status and control register (11-26) */
/* unlock TBSCRK */
immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR;
/* initialize the PIT (11-31) */
immr->im_sitk.sitk_piscrk = KAPWR_KEY;
immr->im_sit.sit_piscr = CONFIG_SYS_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 |= CONFIG_SYS_SCCR;
immr->im_clkrst.car_sccr = reg;
/* PLL (CPU clock) settings (15-30) */
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 current MF
* field value.
*
* For newer (starting MPC866) chips PLPRCR layout is different.
*/
#ifdef CONFIG_SYS_PLPRCR
mfmask = PLPRCR_MFACT_MSK;
if ((CONFIG_SYS_PLPRCR & mfmask) != 0)
reg = CONFIG_SYS_PLPRCR; /* reset control bits */
else {
reg = immr->im_clkrst.car_plprcr;
reg &= mfmask; /* isolate MF-related fields */
reg |= CONFIG_SYS_PLPRCR; /* reset control bits */
}
immr->im_clkrst.car_plprcr = reg;
#endif
/*
* 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
* CONFIG_SYS_OR0_REMAP some boards (wide address mask) allow to map the
* CONFIG_SYS_MONITOR_BASE, while others (narrower address mask) can't
* map CONFIG_SYS_MONITOR_BASE.
*
* For example, for CONFIG_IVMS8, the CONFIG_SYS_MONITOR_BASE is
* 0xff000000, but CONFIG_SYS_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 CONFIG_SYS_MONITOR_BASE wasn't mapped
* into the Bank0.
*
* This is why CONFIG_IVMS8 and similar boards must load BR0 with
* CONFIG_SYS_BR0_PRELIM in advance.
*
* [Thanks to Michael Liao for this explanation.
* I owe him a free beer. - wd]
*/
#if defined(CONFIG_SYS_OR0_REMAP)
memctl->memc_or0 = CONFIG_SYS_OR0_REMAP;
#endif
#if defined(CONFIG_SYS_OR1_REMAP)
memctl->memc_or1 = CONFIG_SYS_OR1_REMAP;
#endif
#if defined(CONFIG_SYS_OR5_REMAP)
memctl->memc_or5 = CONFIG_SYS_OR5_REMAP;
#endif
/* now restrict to preliminary range */
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
#if defined(CONFIG_SYS_OR4_PRELIM) && defined(CONFIG_SYS_BR4_PRELIM)
memctl->memc_or4 = CONFIG_SYS_OR4_PRELIM;
memctl->memc_br4 = CONFIG_SYS_BR4_PRELIM;
#endif
#if defined(CONFIG_SYS_OR5_PRELIM) && defined(CONFIG_SYS_BR5_PRELIM)
memctl->memc_or5 = CONFIG_SYS_OR5_PRELIM;
memctl->memc_br5 = CONFIG_SYS_BR5_PRELIM;
#endif
#if defined(CONFIG_SYS_OR6_PRELIM) && defined(CONFIG_SYS_BR6_PRELIM)
memctl->memc_or6 = CONFIG_SYS_OR6_PRELIM;
memctl->memc_br6 = CONFIG_SYS_BR6_PRELIM;
#endif
#if defined(CONFIG_SYS_OR7_PRELIM) && defined(CONFIG_SYS_BR7_PRELIM)
memctl->memc_or7 = CONFIG_SYS_OR7_PRELIM;
memctl->memc_br7 = CONFIG_SYS_BR7_PRELIM;
#endif
/*
* 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);
}
/*
* initialize higher level parts of CPU like timers
*/
int cpu_init_r (void)
{
return (0);
}