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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* CPU specific code
*
* written or collected and sometimes rewritten by
* Magnus Damm <damm@bitsmart.com>
*
* minor modifications by
* Wolfgang Denk <wd@denx.de>
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <asm/cache.h>
#include <ppc4xx.h>
#if defined(CONFIG_440)
static int do_chip_reset( unsigned long sys0, unsigned long sys1 );
#endif
/* ------------------------------------------------------------------------- */
int checkcpu (void)
{
#if defined(CONFIG_405GP) || \
defined(CONFIG_405CR) || \
defined(CONFIG_405EP) || \
defined(CONFIG_440) || \
defined(CONFIG_IOP480)
uint pvr = get_pvr();
#endif
#if defined(CONFIG_405GP) || \
defined(CONFIG_405CR) || \
defined(CONFIG_405EP) || \
defined(CONFIG_IOP480)
DECLARE_GLOBAL_DATA_PTR;
ulong clock = gd->cpu_clk;
char buf[32];
#endif
#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_405EP)
PPC405_SYS_INFO sys_info;
puts ("CPU: ");
get_sys_info(&sys_info);
#ifdef CONFIG_405GP
puts ("IBM PowerPC 405GP");
if (pvr == PVR_405GPR_RB) {
putc('r');
}
puts (" Rev. ");
#endif
#ifdef CONFIG_405CR
puts ("IBM PowerPC 405CR Rev. ");
#endif
#ifdef CONFIG_405EP
puts ("IBM PowerPC 405EP Rev. ");
#endif
switch (pvr) {
case PVR_405GP_RB:
case PVR_405GPR_RB:
putc('B');
break;
case PVR_405GP_RC:
#ifdef CONFIG_405CR
case PVR_405CR_RC:
#endif
putc('C');
break;
case PVR_405GP_RD:
putc('D');
break;
#ifdef CONFIG_405GP
case PVR_405GP_RE:
putc('E');
break;
#endif
case PVR_405CR_RA:
putc('A');
break;
case PVR_405CR_RB:
case PVR_405EP_RB:
putc('B');
break;
default:
printf ("? (PVR=%08x)", pvr);
break;
}
printf (" at %s MHz (PLB=%lu, OPB=%lu, EBC=%lu MHz)\n", strmhz(buf, clock),
sys_info.freqPLB / 1000000,
sys_info.freqPLB / sys_info.pllOpbDiv / 1000000,
sys_info.freqPLB / sys_info.pllExtBusDiv / 1000000);
#if defined(CONFIG_405GP)
if (mfdcr(strap) & PSR_PCI_ASYNC_EN) {
printf (" PCI async ext clock used, ");
} else {
printf (" PCI sync clock at %lu MHz, ",
sys_info.freqPLB / sys_info.pllPciDiv / 1000000);
}
printf ("%sternal PCI arbiter enabled\n",
(mfdcr(strap) & PSR_PCI_ARBIT_EN) ? "in" : "ex");
#elif defined(CONFIG_405EP)
printf (" IIC Boot EEPROM %sabled\n",
(mfdcr(cpc0_boot) & CPC0_BOOT_SEP) ? "en" : "dis");
printf (" PCI async ext clock used, ");
printf ("%sternal PCI arbiter enabled\n",
(mfdcr(cpc0_pci) & CPC0_PCI_ARBIT_EN) ? "in" : "ex");
#endif
#if defined(CONFIG_405EP)
printf (" 16 kB I-Cache 16 kB D-Cache");
#else
printf (" 16 kB I-Cache %d kB D-Cache",
((pvr | 0x00000001) == PVR_405GPR_RB) ? 16 : 8);
#endif
#endif /* defined(CONFIG_405GP) || defined(CONFIG_405CR) */
#ifdef CONFIG_IOP480
printf ("PLX IOP480 (PVR=%08x)", pvr);
printf (" at %s MHz:", strmhz(buf, clock));
printf (" %u kB I-Cache", 4);
printf (" %u kB D-Cache", 2);
#endif
#if defined(CONFIG_440)
puts ("IBM PowerPC 440 G");
switch(pvr) {
case PVR_440GP_RB:
puts("P Rev. B");
/* See errata 1.12: CHIP_4 */
if ((mfdcr(cpc0_sys0) != mfdcr(cpc0_strp0)) ||
(mfdcr(cpc0_sys1) != mfdcr(cpc0_strp1)) ){
puts ( "\n\t CPC0_SYSx DCRs corrupted. "
"Resetting chip ...\n");
udelay( 1000 * 1000 ); /* Give time for serial buf to clear */
do_chip_reset ( mfdcr(cpc0_strp0),
mfdcr(cpc0_strp1) );
}
break;
case PVR_440GP_RC:
puts("P Rev. C");
break;
case PVR_440GX_RA:
puts("X Rev. A");
break;
case PVR_440GX_RB:
puts("X Rev. B");
break;
default:
printf ("UNKNOWN (PVR=%08x)", pvr);
break;
}
#endif
puts ("\n");
return 0;
}
/* ------------------------------------------------------------------------- */
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
/*
* Initiate system reset in debug control register DBCR
*/
__asm__ __volatile__("lis 3, 0x3000" ::: "r3");
#if defined(CONFIG_440)
__asm__ __volatile__("mtspr 0x134, 3");
#else
__asm__ __volatile__("mtspr 0x3f2, 3");
#endif
return 1;
}
#if defined(CONFIG_440)
static
int do_chip_reset (unsigned long sys0, unsigned long sys1)
{
/* Changes to cpc0_sys0 and cpc0_sys1 require chip
* reset.
*/
mtdcr (cntrl0, mfdcr (cntrl0) | 0x80000000); /* Set SWE */
mtdcr (cpc0_sys0, sys0);
mtdcr (cpc0_sys1, sys1);
mtdcr (cntrl0, mfdcr (cntrl0) & ~0x80000000); /* Clr SWE */
mtspr (dbcr0, 0x20000000); /* Reset the chip */
return 1;
}
#endif
/*
* Get timebase clock frequency
*/
unsigned long get_tbclk (void)
{
#if defined(CONFIG_440)
sys_info_t sys_info;
get_sys_info(&sys_info);
return (sys_info.freqProcessor);
#elif defined(CONFIG_405GP) || \
defined(CONFIG_405CR) || \
defined(CONFIG_405) || \
defined(CONFIG_405EP)
PPC405_SYS_INFO sys_info;
get_sys_info(&sys_info);
return (sys_info.freqProcessor);
#elif defined(CONFIG_IOP480)
return (66000000);
#else
# error get_tbclk() not implemented
#endif
}
#if defined(CONFIG_WATCHDOG)
void
watchdog_reset(void)
{
int re_enable = disable_interrupts();
reset_4xx_watchdog();
if (re_enable) enable_interrupts();
}
void
reset_4xx_watchdog(void)
{
/*
* Clear TSR(WIS) bit
*/
mtspr(tsr, 0x40000000);
}
#endif /* CONFIG_WATCHDOG */
|
