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1 | /* | |
2 | * (C) Copyright 2000-2003 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* | |
25 | * CPU specific code | |
26 | * | |
27 | * written or collected and sometimes rewritten by | |
28 | * Magnus Damm <damm@bitsmart.com> | |
29 | * | |
30 | * minor modifications by | |
31 | * Wolfgang Denk <wd@denx.de> | |
32 | */ | |
33 | ||
34 | #include <common.h> | |
35 | #include <watchdog.h> | |
36 | #include <command.h> | |
37 | #include <asm/cache.h> | |
38 | #include <ppc4xx.h> | |
39 | ||
40 | #if !defined(CONFIG_405) | |
41 | DECLARE_GLOBAL_DATA_PTR; | |
42 | #endif | |
43 | ||
44 | ||
45 | #if defined(CONFIG_440) | |
46 | #define FREQ_EBC (sys_info.freqEPB) | |
47 | #else | |
48 | #define FREQ_EBC (sys_info.freqPLB / sys_info.pllExtBusDiv) | |
49 | #endif | |
50 | ||
51 | #if defined(CONFIG_405GP) || defined(CONFIG_440EP) || defined(CONFIG_440GR) | |
52 | ||
53 | #define PCI_ASYNC | |
54 | ||
55 | int pci_async_enabled(void) | |
56 | { | |
57 | #if defined(CONFIG_405GP) | |
58 | return (mfdcr(strap) & PSR_PCI_ASYNC_EN); | |
59 | #endif | |
60 | ||
61 | #if defined(CONFIG_440EP) || defined(CONFIG_440GR) | |
62 | unsigned long val; | |
63 | ||
64 | mfsdr(sdr_sdstp1, val); | |
65 | return (val & SDR0_SDSTP1_PAME_MASK); | |
66 | #endif | |
67 | } | |
68 | #endif | |
69 | ||
70 | #if defined(CONFIG_PCI) && !defined(CONFIG_IOP480) && !defined(CONFIG_405) | |
71 | int pci_arbiter_enabled(void) | |
72 | { | |
73 | #if defined(CONFIG_405GP) | |
74 | return (mfdcr(strap) & PSR_PCI_ARBIT_EN); | |
75 | #endif | |
76 | ||
77 | #if defined(CONFIG_405EP) | |
78 | return (mfdcr(cpc0_pci) & CPC0_PCI_ARBIT_EN); | |
79 | #endif | |
80 | ||
81 | #if defined(CONFIG_440GP) | |
82 | return (mfdcr(cpc0_strp1) & CPC0_STRP1_PAE_MASK); | |
83 | #endif | |
84 | ||
85 | #if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SP) | |
86 | unsigned long val; | |
87 | ||
88 | mfsdr(sdr_sdstp1, val); | |
89 | return (val & SDR0_SDSTP1_PAE_MASK); | |
90 | #endif | |
91 | } | |
92 | #endif | |
93 | ||
94 | #if defined(CONFIG_405EP)|| defined(CONFIG_440EP) || defined(CONFIG_440GR) || \ | |
95 | defined(CONFIG_440GX) || defined(CONFIG_440SP) | |
96 | ||
97 | #define I2C_BOOTROM | |
98 | ||
99 | int i2c_bootrom_enabled(void) | |
100 | { | |
101 | #if defined(CONFIG_405EP) | |
102 | return (mfdcr(cpc0_boot) & CPC0_BOOT_SEP); | |
103 | #endif | |
104 | ||
105 | #if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SP) | |
106 | unsigned long val; | |
107 | ||
108 | mfsdr(sdr_sdcs, val); | |
109 | return (val & SDR0_SDCS_SDD); | |
110 | #endif | |
111 | } | |
112 | #endif | |
113 | ||
114 | ||
115 | #if defined(CONFIG_440) | |
116 | static int do_chip_reset(unsigned long sys0, unsigned long sys1); | |
117 | #endif | |
118 | ||
119 | ||
120 | int checkcpu (void) | |
121 | { | |
122 | #if !defined(CONFIG_405) /* not used on Xilinx 405 FPGA implementations */ | |
123 | uint pvr = get_pvr(); | |
124 | ulong clock = gd->cpu_clk; | |
125 | char buf[32]; | |
126 | ||
127 | #if !defined(CONFIG_IOP480) | |
128 | sys_info_t sys_info; | |
129 | ||
130 | puts ("CPU: "); | |
131 | ||
132 | get_sys_info(&sys_info); | |
133 | ||
134 | puts("AMCC PowerPC 4"); | |
135 | ||
136 | #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_405EP) | |
137 | puts("05"); | |
138 | #endif | |
139 | #if defined(CONFIG_440) | |
140 | puts("40"); | |
141 | #endif | |
142 | ||
143 | switch (pvr) { | |
144 | case PVR_405GP_RB: | |
145 | puts("GP Rev. B"); | |
146 | break; | |
147 | ||
148 | case PVR_405GP_RC: | |
149 | puts("GP Rev. C"); | |
150 | break; | |
151 | ||
152 | case PVR_405GP_RD: | |
153 | puts("GP Rev. D"); | |
154 | break; | |
155 | ||
156 | #ifdef CONFIG_405GP | |
157 | case PVR_405GP_RE: /* 405GP rev E and 405CR rev C have same PVR */ | |
158 | puts("GP Rev. E"); | |
159 | break; | |
160 | #endif | |
161 | ||
162 | case PVR_405CR_RA: | |
163 | puts("CR Rev. A"); | |
164 | break; | |
165 | ||
166 | case PVR_405CR_RB: | |
167 | puts("CR Rev. B"); | |
168 | break; | |
169 | ||
170 | #ifdef CONFIG_405CR | |
171 | case PVR_405CR_RC: /* 405GP rev E and 405CR rev C have same PVR */ | |
172 | puts("CR Rev. C"); | |
173 | break; | |
174 | #endif | |
175 | ||
176 | case PVR_405GPR_RB: | |
177 | puts("GPr Rev. B"); | |
178 | break; | |
179 | ||
180 | case PVR_405EP_RB: | |
181 | puts("EP Rev. B"); | |
182 | break; | |
183 | ||
184 | #if defined(CONFIG_440) | |
185 | case PVR_440GP_RB: | |
186 | puts("GP Rev. B"); | |
187 | /* See errata 1.12: CHIP_4 */ | |
188 | if ((mfdcr(cpc0_sys0) != mfdcr(cpc0_strp0)) || | |
189 | (mfdcr(cpc0_sys1) != mfdcr(cpc0_strp1)) ){ | |
190 | puts ( "\n\t CPC0_SYSx DCRs corrupted. " | |
191 | "Resetting chip ...\n"); | |
192 | udelay( 1000 * 1000 ); /* Give time for serial buf to clear */ | |
193 | do_chip_reset ( mfdcr(cpc0_strp0), | |
194 | mfdcr(cpc0_strp1) ); | |
195 | } | |
196 | break; | |
197 | ||
198 | case PVR_440GP_RC: | |
199 | puts("GP Rev. C"); | |
200 | break; | |
201 | ||
202 | case PVR_440GX_RA: | |
203 | puts("GX Rev. A"); | |
204 | break; | |
205 | ||
206 | case PVR_440GX_RB: | |
207 | puts("GX Rev. B"); | |
208 | break; | |
209 | ||
210 | case PVR_440GX_RC: | |
211 | puts("GX Rev. C"); | |
212 | break; | |
213 | ||
214 | case PVR_440GX_RF: | |
215 | puts("GX Rev. F"); | |
216 | break; | |
217 | ||
218 | case PVR_440EP_RA: | |
219 | puts("EP Rev. A"); | |
220 | break; | |
221 | ||
222 | #ifdef CONFIG_440EP | |
223 | case PVR_440EP_RB: /* 440EP rev B and 440GR rev A have same PVR */ | |
224 | puts("EP Rev. B"); | |
225 | break; | |
226 | #endif /* CONFIG_440EP */ | |
227 | ||
228 | #ifdef CONFIG_440GR | |
229 | case PVR_440GR_RA: /* 440EP rev B and 440GR rev A have same PVR */ | |
230 | puts("GR Rev. A"); | |
231 | break; | |
232 | #endif /* CONFIG_440GR */ | |
233 | #endif /* CONFIG_440 */ | |
234 | ||
235 | case PVR_440SP_RA: | |
236 | puts("SP Rev. A"); | |
237 | break; | |
238 | ||
239 | case PVR_440SP_RB: | |
240 | puts("SP Rev. B"); | |
241 | break; | |
242 | ||
243 | default: | |
244 | printf (" UNKNOWN (PVR=%08x)", pvr); | |
245 | break; | |
246 | } | |
247 | ||
248 | printf (" at %s MHz (PLB=%lu, OPB=%lu, EBC=%lu MHz)\n", strmhz(buf, clock), | |
249 | sys_info.freqPLB / 1000000, | |
250 | sys_info.freqPLB / sys_info.pllOpbDiv / 1000000, | |
251 | FREQ_EBC / 1000000); | |
252 | ||
253 | #if defined(I2C_BOOTROM) | |
254 | printf (" I2C boot EEPROM %sabled\n", i2c_bootrom_enabled() ? "en" : "dis"); | |
255 | #endif | |
256 | ||
257 | #if defined(CONFIG_PCI) | |
258 | printf (" Internal PCI arbiter %sabled", pci_arbiter_enabled() ? "en" : "dis"); | |
259 | #endif | |
260 | ||
261 | #if defined(PCI_ASYNC) | |
262 | if (pci_async_enabled()) { | |
263 | printf (", PCI async ext clock used"); | |
264 | } else { | |
265 | printf (", PCI sync clock at %lu MHz", | |
266 | sys_info.freqPLB / sys_info.pllPciDiv / 1000000); | |
267 | } | |
268 | #endif | |
269 | ||
270 | #if defined(CONFIG_PCI) | |
271 | putc('\n'); | |
272 | #endif | |
273 | ||
274 | #if defined(CONFIG_405EP) | |
275 | printf (" 16 kB I-Cache 16 kB D-Cache"); | |
276 | #elif defined(CONFIG_440) | |
277 | printf (" 32 kB I-Cache 32 kB D-Cache"); | |
278 | #else | |
279 | printf (" 16 kB I-Cache %d kB D-Cache", | |
280 | ((pvr | 0x00000001) == PVR_405GPR_RB) ? 16 : 8); | |
281 | #endif | |
282 | #endif /* !defined(CONFIG_IOP480) */ | |
283 | ||
284 | #if defined(CONFIG_IOP480) | |
285 | printf ("PLX IOP480 (PVR=%08x)", pvr); | |
286 | printf (" at %s MHz:", strmhz(buf, clock)); | |
287 | printf (" %u kB I-Cache", 4); | |
288 | printf (" %u kB D-Cache", 2); | |
289 | #endif | |
290 | ||
291 | #endif /* !defined(CONFIG_405) */ | |
292 | ||
293 | putc ('\n'); | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
298 | ||
299 | /* ------------------------------------------------------------------------- */ | |
300 | ||
301 | int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
302 | { | |
303 | #if defined(CONFIG_YOSEMITE) || defined(CONFIG_YELLOWSTONE) | |
304 | /*give reset to BCSR*/ | |
305 | *(unsigned char*)(CFG_BCSR_BASE | 0x06) = 0x09; | |
306 | ||
307 | #else | |
308 | ||
309 | /* | |
310 | * Initiate system reset in debug control register DBCR | |
311 | */ | |
312 | __asm__ __volatile__("lis 3, 0x3000" ::: "r3"); | |
313 | #if defined(CONFIG_440) | |
314 | __asm__ __volatile__("mtspr 0x134, 3"); | |
315 | #else | |
316 | __asm__ __volatile__("mtspr 0x3f2, 3"); | |
317 | #endif | |
318 | ||
319 | #endif/* defined(CONFIG_YOSEMITE) || defined(CONFIG_YELLOWSTONE)*/ | |
320 | return 1; | |
321 | } | |
322 | ||
323 | #if defined(CONFIG_440) | |
324 | static int do_chip_reset (unsigned long sys0, unsigned long sys1) | |
325 | { | |
326 | /* Changes to cpc0_sys0 and cpc0_sys1 require chip | |
327 | * reset. | |
328 | */ | |
329 | mtdcr (cntrl0, mfdcr (cntrl0) | 0x80000000); /* Set SWE */ | |
330 | mtdcr (cpc0_sys0, sys0); | |
331 | mtdcr (cpc0_sys1, sys1); | |
332 | mtdcr (cntrl0, mfdcr (cntrl0) & ~0x80000000); /* Clr SWE */ | |
333 | mtspr (dbcr0, 0x20000000); /* Reset the chip */ | |
334 | ||
335 | return 1; | |
336 | } | |
337 | #endif | |
338 | ||
339 | ||
340 | /* | |
341 | * Get timebase clock frequency | |
342 | */ | |
343 | unsigned long get_tbclk (void) | |
344 | { | |
345 | #if !defined(CONFIG_IOP480) | |
346 | sys_info_t sys_info; | |
347 | ||
348 | get_sys_info(&sys_info); | |
349 | return (sys_info.freqProcessor); | |
350 | #else | |
351 | return (66000000); | |
352 | #endif | |
353 | ||
354 | } | |
355 | ||
356 | ||
357 | #if defined(CONFIG_WATCHDOG) | |
358 | void | |
359 | watchdog_reset(void) | |
360 | { | |
361 | int re_enable = disable_interrupts(); | |
362 | reset_4xx_watchdog(); | |
363 | if (re_enable) enable_interrupts(); | |
364 | } | |
365 | ||
366 | void | |
367 | reset_4xx_watchdog(void) | |
368 | { | |
369 | /* | |
370 | * Clear TSR(WIS) bit | |
371 | */ | |
372 | mtspr(tsr, 0x40000000); | |
373 | } | |
374 | #endif /* CONFIG_WATCHDOG */ |