blob: 845861eea7facf9ffba9ea2e1ffe140e2715fe29 (
plain)
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
|
/*
* Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <mpc83xx.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Breathe 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 * im)
{
int i;
/* Pointer is writable since we allocated a register for it */
gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
/* Clear initial global data */
for (i = 0; i < sizeof(gd_t); i++)
((char *)gd)[i] = 0;
/* system performance tweaking */
#ifdef CONFIG_SYS_ACR_PIPE_DEP
/* Arbiter pipeline depth */
im->arbiter.acr = (im->arbiter.acr & ~ACR_PIPE_DEP) |
(CONFIG_SYS_ACR_PIPE_DEP << ACR_PIPE_DEP_SHIFT);
#endif
#ifdef CONFIG_SYS_ACR_RPTCNT
/* Arbiter repeat count */
im->arbiter.acr = (im->arbiter.acr & ~(ACR_RPTCNT)) |
(CONFIG_SYS_ACR_RPTCNT << ACR_RPTCNT_SHIFT);
#endif
#ifdef CONFIG_SYS_SPCR_OPT
/* Optimize transactions between CSB and other devices */
im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_OPT) |
(CONFIG_SYS_SPCR_OPT << SPCR_OPT_SHIFT);
#endif
/* Enable Time Base & Decrementer (so we will have udelay()) */
im->sysconf.spcr |= SPCR_TBEN;
/* DDR control driver register */
#ifdef CONFIG_SYS_DDRCDR
im->sysconf.ddrcdr = CONFIG_SYS_DDRCDR;
#endif
/* Output buffer impedance register */
#ifdef CONFIG_SYS_OBIR
im->sysconf.obir = CONFIG_SYS_OBIR;
#endif
/*
* Memory Controller:
*/
/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
* addresses - these have to be modified later when FLASH size
* has been determined
*/
#if defined(CONFIG_SYS_NAND_BR_PRELIM) \
&& defined(CONFIG_SYS_NAND_OR_PRELIM) \
&& defined(CONFIG_SYS_NAND_LBLAWBAR_PRELIM) \
&& defined(CONFIG_SYS_NAND_LBLAWAR_PRELIM)
set_lbc_br(0, CONFIG_SYS_NAND_BR_PRELIM);
set_lbc_or(0, CONFIG_SYS_NAND_OR_PRELIM);
im->sysconf.lblaw[0].bar = CONFIG_SYS_NAND_LBLAWBAR_PRELIM;
im->sysconf.lblaw[0].ar = CONFIG_SYS_NAND_LBLAWAR_PRELIM;
#else
#error CONFIG_SYS_NAND_BR_PRELIM, CONFIG_SYS_NAND_OR_PRELIM, CONFIG_SYS_NAND_LBLAWBAR_PRELIM & CONFIG_SYS_NAND_LBLAWAR_PRELIM must be defined
#endif
}
/*
* Get timebase clock frequency (like cpu_clk in Hz)
*/
unsigned long get_tbclk(void)
{
return (gd->bus_clk + 3L) / 4L;
}
void puts(const char *str)
{
while (*str)
putc(*str++);
}
|
