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idle governor: Avoid lock acquisition to read pm_qos before entering idle
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / frv / kernel / setup.c
blob75cf7f4b2fa81d8e0bd18cf6d0ff3ae4d64f8004
1 /* setup.c: FRV specific setup
2 *
3 * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 * - Derived from arch/m68k/kernel/setup.c
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13 #include <generated/utsrelease.h>
14 #include <linux/kernel.h>
15 #include <linux/sched.h>
16 #include <linux/delay.h>
17 #include <linux/interrupt.h>
18 #include <linux/fs.h>
19 #include <linux/mm.h>
20 #include <linux/fb.h>
21 #include <linux/console.h>
22 #include <linux/genhd.h>
23 #include <linux/errno.h>
24 #include <linux/string.h>
25 #include <linux/major.h>
26 #include <linux/bootmem.h>
27 #include <linux/highmem.h>
28 #include <linux/seq_file.h>
29 #include <linux/serial.h>
30 #include <linux/serial_core.h>
31 #include <linux/serial_reg.h>
32 #include <linux/serial_8250.h>
33
34 #include <asm/setup.h>
35 #include <asm/irq.h>
36 #include <asm/sections.h>
37 #include <asm/pgalloc.h>
38 #include <asm/busctl-regs.h>
39 #include <asm/serial-regs.h>
40 #include <asm/timer-regs.h>
41 #include <asm/irc-regs.h>
42 #include <asm/spr-regs.h>
43 #include <asm/mb-regs.h>
44 #include <asm/mb93493-regs.h>
45 #include <asm/gdb-stub.h>
46 #include <asm/io.h>
47
48 #ifdef CONFIG_BLK_DEV_INITRD
49 #include <asm/pgtable.h>
50 #endif
51
52 #include "local.h"
53
54 #ifdef CONFIG_MB93090_MB00
55 static void __init mb93090_display(void);
56 #endif
57 #ifdef CONFIG_MMU
58 static void __init setup_linux_memory(void);
59 #else
60 static void __init setup_uclinux_memory(void);
61 #endif
62
63 #ifdef CONFIG_MB93090_MB00
64 static char __initdata mb93090_banner[] = "FJ/RH FR-V Linux";
65 static char __initdata mb93090_version[] = UTS_RELEASE;
66
67 int __nongprelbss mb93090_mb00_detected;
68 #endif
69
70 const char __frv_unknown_system[] = "unknown";
71 const char __frv_mb93091_cb10[] = "mb93091-cb10";
72 const char __frv_mb93091_cb11[] = "mb93091-cb11";
73 const char __frv_mb93091_cb30[] = "mb93091-cb30";
74 const char __frv_mb93091_cb41[] = "mb93091-cb41";
75 const char __frv_mb93091_cb60[] = "mb93091-cb60";
76 const char __frv_mb93091_cb70[] = "mb93091-cb70";
77 const char __frv_mb93091_cb451[] = "mb93091-cb451";
78 const char __frv_mb93090_mb00[] = "mb93090-mb00";
79
80 const char __frv_mb93493[] = "mb93493";
81
82 const char __frv_mb93093[] = "mb93093";
83
84 static const char *__nongprelbss cpu_series;
85 static const char *__nongprelbss cpu_core;
86 static const char *__nongprelbss cpu_silicon;
87 static const char *__nongprelbss cpu_mmu;
88 static const char *__nongprelbss cpu_system;
89 static const char *__nongprelbss cpu_board1;
90 static const char *__nongprelbss cpu_board2;
91
92 static unsigned long __nongprelbss cpu_psr_all;
93 static unsigned long __nongprelbss cpu_hsr0_all;
94
95 unsigned long __nongprelbss pdm_suspend_mode;
96
97 unsigned long __nongprelbss rom_length;
98 unsigned long __nongprelbss memory_start;
99 unsigned long __nongprelbss memory_end;
100
101 unsigned long __nongprelbss dma_coherent_mem_start;
102 unsigned long __nongprelbss dma_coherent_mem_end;
103
104 unsigned long __initdata __sdram_old_base;
105 unsigned long __initdata num_mappedpages;
106
107 struct cpuinfo_frv __nongprelbss boot_cpu_data;
108
109 char __initdata command_line[COMMAND_LINE_SIZE];
110 char __initdata redboot_command_line[COMMAND_LINE_SIZE];
111
112 #ifdef CONFIG_PM
113 #define __pminit
114 #define __pminitdata
115 #else
116 #define __pminit __init
117 #define __pminitdata __initdata
118 #endif
119
120 struct clock_cmode {
121 uint8_t xbus, sdram, corebus, core, dsu;
122 };
123
124 #define _frac(N,D) ((N)<<4 | (D))
125 #define _x0_16 _frac(1,6)
126 #define _x0_25 _frac(1,4)
127 #define _x0_33 _frac(1,3)
128 #define _x0_375 _frac(3,8)
129 #define _x0_5 _frac(1,2)
130 #define _x0_66 _frac(2,3)
131 #define _x0_75 _frac(3,4)
132 #define _x1 _frac(1,1)
133 #define _x1_5 _frac(3,2)
134 #define _x2 _frac(2,1)
135 #define _x3 _frac(3,1)
136 #define _x4 _frac(4,1)
137 #define _x4_5 _frac(9,2)
138 #define _x6 _frac(6,1)
139 #define _x8 _frac(8,1)
140 #define _x9 _frac(9,1)
141
142 int __nongprelbss clock_p0_current;
143 int __nongprelbss clock_cm_current;
144 int __nongprelbss clock_cmode_current;
145 #ifdef CONFIG_PM
146 int __nongprelbss clock_cmodes_permitted;
147 unsigned long __nongprelbss clock_bits_settable;
148 #endif
149
150 static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 };
151
152 static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = {
153 [4] = { _x1, _x1, _x2, _x2, _x0_25 },
154 [5] = { _x1, _x2, _x4, _x4, _x0_5 },
155 [8] = { _x1, _x1, _x1, _x2, _x0_25 },
156 [9] = { _x1, _x2, _x2, _x4, _x0_5 },
157 [11] = { _x1, _x4, _x4, _x8, _x1 },
158 [12] = { _x1, _x1, _x2, _x4, _x0_5 },
159 [13] = { _x1, _x2, _x4, _x8, _x1 },
160 };
161
162 static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = {
163 [0] = { _x1, _x1, _x1, _x1, _x0_5 },
164 [1] = { _x1, _x1, _x1, _x3, _x0_25 },
165 [2] = { _x1, _x1, _x2, _x6, _x0_5 },
166 [3] = { _x1, _x2, _x2, _x6, _x0_5 },
167 [4] = { _x1, _x1, _x2, _x2, _x0_16 },
168 [8] = { _x1, _x1, _x1, _x2, _x0_16 },
169 [9] = { _x1, _x2, _x2, _x4, _x0_33 },
170 [12] = { _x1, _x1, _x2, _x4, _x0_33 },
171 [14] = { _x1, _x3, _x3, _x9, _x0_75 },
172 [15] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
173
174 #define CLOCK_CMODES_PERMITTED_FR405 0xd31f
175 };
176
177 static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = {
178 [0] = { _x1, _x2, _x2, _x4, _x0_33 },
179 [1] = { _x1, _x3, _x3, _x6, _x0_5 },
180 [2] = { _x1, _x2, _x4, _x8, _x0_66 },
181 [3] = { _x1, _x1_5, _x3, _x6, _x0_5 },
182 [4] = { _x1, _x3, _x3, _x9, _x0_75 },
183 [5] = { _x1, _x2, _x2, _x6, _x0_5 },
184 [6] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
185 };
186
187 static const struct clock_cmode __pminitdata *clock_cmodes;
188 static int __pminitdata clock_doubled;
189
190 static struct uart_port __pminitdata __frv_uart0 = {
191 .uartclk = 0,
192 .membase = (char *) UART0_BASE,
193 .irq = IRQ_CPU_UART0,
194 .regshift = 3,
195 .iotype = UPIO_MEM,
196 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
197 };
198
199 static struct uart_port __pminitdata __frv_uart1 = {
200 .uartclk = 0,
201 .membase = (char *) UART1_BASE,
202 .irq = IRQ_CPU_UART1,
203 .regshift = 3,
204 .iotype = UPIO_MEM,
205 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
206 };
207
208 #if 0
209 static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n)
210 {
211 unsigned long phys, virt, cxn, size;
212
213 #ifdef CONFIG_MMU
214 virt = amlr & 0xffffc000;
215 cxn = amlr & 0x3fff;
216 #else
217 virt = ampr & 0xffffc000;
218 cxn = 0;
219 #endif
220 phys = ampr & xAMPRx_PPFN;
221 size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17);
222
223 printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n",
224 i_d, n,
225 virt, virt + size - 1,
226 phys,
227 ampr & xAMPRx_S ? 'S' : '-',
228 ampr & xAMPRx_C ? 'C' : '-',
229 ampr & DAMPRx_WP ? 'W' : '-',
230 ampr & xAMPRx_V ? 'V' : '-',
231 cxn
232 );
233 }
234 #endif
235
236 /*****************************************************************************/
237 /*
238 * dump the memory map
239 */
240 static void __init dump_memory_map(void)
241 {
242
243 #if 0
244 /* dump the protection map */
245 printk_xampr(__get_IAMPR(0), __get_IAMLR(0), 'I', 0);
246 printk_xampr(__get_IAMPR(1), __get_IAMLR(1), 'I', 1);
247 printk_xampr(__get_IAMPR(2), __get_IAMLR(2), 'I', 2);
248 printk_xampr(__get_IAMPR(3), __get_IAMLR(3), 'I', 3);
249 printk_xampr(__get_IAMPR(4), __get_IAMLR(4), 'I', 4);
250 printk_xampr(__get_IAMPR(5), __get_IAMLR(5), 'I', 5);
251 printk_xampr(__get_IAMPR(6), __get_IAMLR(6), 'I', 6);
252 printk_xampr(__get_IAMPR(7), __get_IAMLR(7), 'I', 7);
253 printk_xampr(__get_IAMPR(8), __get_IAMLR(8), 'I', 8);
254 printk_xampr(__get_IAMPR(9), __get_IAMLR(9), 'i', 9);
255 printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10);
256 printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11);
257 printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12);
258 printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13);
259 printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14);
260 printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15);
261
262 printk_xampr(__get_DAMPR(0), __get_DAMLR(0), 'D', 0);
263 printk_xampr(__get_DAMPR(1), __get_DAMLR(1), 'D', 1);
264 printk_xampr(__get_DAMPR(2), __get_DAMLR(2), 'D', 2);
265 printk_xampr(__get_DAMPR(3), __get_DAMLR(3), 'D', 3);
266 printk_xampr(__get_DAMPR(4), __get_DAMLR(4), 'D', 4);
267 printk_xampr(__get_DAMPR(5), __get_DAMLR(5), 'D', 5);
268 printk_xampr(__get_DAMPR(6), __get_DAMLR(6), 'D', 6);
269 printk_xampr(__get_DAMPR(7), __get_DAMLR(7), 'D', 7);
270 printk_xampr(__get_DAMPR(8), __get_DAMLR(8), 'D', 8);
271 printk_xampr(__get_DAMPR(9), __get_DAMLR(9), 'D', 9);
272 printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10);
273 printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11);
274 printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12);
275 printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13);
276 printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14);
277 printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15);
278 #endif
279
280 #if 0
281 /* dump the bus controller registers */
282 printk("LGCR: %08lx\n", __get_LGCR());
283 printk("Master: %08lx-%08lx CR=%08lx\n",
284 __get_LEMBR(), __get_LEMBR() + __get_LEMAM(),
285 __get_LMAICR());
286
287 int loop;
288 for (loop = 1; loop <= 7; loop++) {
289 unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop);
290 printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n",
291 loop,
292 lsbr, lsbr + __get_LSAM(loop),
293 lcr & 0x80000000 ? 'r' : '-',
294 lcr & 0x40000000 ? 'w' : '-',
295 lcr & 0x08000000 ? 'b' : '-',
296 lcr & 0x04000000 ? 'B' : '-',
297 lcr & 0x02000000 ? 'C' : '-',
298 lcr & 0x01000000 ? 'D' : '-',
299 lcr & 0x00800000 ? 'W' : '-',
300 lcr & 0x00400000 ? 'R' : '-',
301 (lcr & 0x00030000) == 0x00000000 ? '4' :
302 (lcr & 0x00030000) == 0x00010000 ? '2' :
303 (lcr & 0x00030000) == 0x00020000 ? '1' :
304 '-'
305 );
306 }
307 #endif
308
309 #if 0
310 printk("\n");
311 #endif
312 } /* end dump_memory_map() */
313
314 /*****************************************************************************/
315 /*
316 * attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system
317 */
318 #ifdef CONFIG_MB93091_VDK
319 static void __init detect_mb93091(void)
320 {
321 #ifdef CONFIG_MB93090_MB00
322 /* Detect CB70 without motherboard */
323 if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) {
324 cpu_board1 = __frv_mb93090_mb00;
325 mb93090_mb00_detected = 1;
326 }
327 #endif
328
329 #ifdef CONFIG_FUJITSU_MB93493
330 cpu_board2 = __frv_mb93493;
331 #endif
332
333 } /* end detect_mb93091() */
334 #endif
335
336 /*****************************************************************************/
337 /*
338 * determine the CPU type and set appropriate parameters
339 *
340 * Family Series CPU Core Silicon Imple Vers
341 * ----------------------------------------------------------
342 * FR-V --+-> FR400 --+-> FR401 --+-> MB93401 02 00 [1]
343 * | | |
344 * | | +-> MB93401/A 02 01
345 * | | |
346 * | | +-> MB93403 02 02
347 * | |
348 * | +-> FR405 ----> MB93405 04 00
349 * |
350 * +-> FR450 ----> FR451 ----> MB93451 05 00
351 * |
352 * +-> FR500 ----> FR501 --+-> MB93501 01 01 [2]
353 * | |
354 * | +-> MB93501/A 01 02
355 * |
356 * +-> FR550 --+-> FR551 ----> MB93555 03 01
357 *
358 * [1] The MB93401 is an obsolete CPU replaced by the MB93401A
359 * [2] The MB93501 is an obsolete CPU replaced by the MB93501A
360 *
361 * Imple is PSR(Processor Status Register)[31:28].
362 * Vers is PSR(Processor Status Register)[27:24].
363 *
364 * A "Silicon" consists of CPU core and some on-chip peripherals.
365 */
366 static void __init determine_cpu(void)
367 {
368 unsigned long hsr0 = __get_HSR(0);
369 unsigned long psr = __get_PSR();
370
371 /* work out what selectable services the CPU supports */
372 __set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM);
373 cpu_psr_all = __get_PSR();
374 __set_PSR(psr);
375
376 __set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE);
377 cpu_hsr0_all = __get_HSR(0);
378 __set_HSR(0, hsr0);
379
380 /* derive other service specs from the CPU type */
381 cpu_series = "unknown";
382 cpu_core = "unknown";
383 cpu_silicon = "unknown";
384 cpu_mmu = "Prot";
385 cpu_system = __frv_unknown_system;
386 clock_cmodes = NULL;
387 clock_doubled = 0;
388 #ifdef CONFIG_PM
389 clock_bits_settable = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0;
390 #endif
391
392 switch (PSR_IMPLE(psr)) {
393 case PSR_IMPLE_FR401:
394 cpu_series = "fr400";
395 cpu_core = "fr401";
396 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
397
398 switch (PSR_VERSION(psr)) {
399 case PSR_VERSION_FR401_MB93401:
400 cpu_silicon = "mb93401";
401 cpu_system = __frv_mb93091_cb10;
402 clock_cmodes = clock_cmodes_fr401_fr403;
403 clock_doubled = 1;
404 break;
405 case PSR_VERSION_FR401_MB93401A:
406 cpu_silicon = "mb93401/A";
407 cpu_system = __frv_mb93091_cb11;
408 clock_cmodes = clock_cmodes_fr401_fr403;
409 break;
410 case PSR_VERSION_FR401_MB93403:
411 cpu_silicon = "mb93403";
412 #ifndef CONFIG_MB93093_PDK
413 cpu_system = __frv_mb93091_cb30;
414 #else
415 cpu_system = __frv_mb93093;
416 #endif
417 clock_cmodes = clock_cmodes_fr401_fr403;
418 break;
419 default:
420 break;
421 }
422 break;
423
424 case PSR_IMPLE_FR405:
425 cpu_series = "fr400";
426 cpu_core = "fr405";
427 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
428
429 switch (PSR_VERSION(psr)) {
430 case PSR_VERSION_FR405_MB93405:
431 cpu_silicon = "mb93405";
432 cpu_system = __frv_mb93091_cb60;
433 clock_cmodes = clock_cmodes_fr405;
434 #ifdef CONFIG_PM
435 clock_bits_settable |= CLOCK_BIT_CMODE;
436 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
437 #endif
438
439 /* the FPGA on the CB70 has extra registers
440 * - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is
441 * how we tell the difference between it and a CB60
442 */
443 if (*(volatile unsigned short *) 0xffc001a0 == 0x0046)
444 cpu_system = __frv_mb93091_cb70;
445 break;
446 default:
447 break;
448 }
449 break;
450
451 case PSR_IMPLE_FR451:
452 cpu_series = "fr450";
453 cpu_core = "fr451";
454 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
455 #ifdef CONFIG_PM
456 clock_bits_settable |= CLOCK_BIT_CMODE;
457 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
458 #endif
459 switch (PSR_VERSION(psr)) {
460 case PSR_VERSION_FR451_MB93451:
461 cpu_silicon = "mb93451";
462 cpu_mmu = "Prot, SAT, xSAT, DAT";
463 cpu_system = __frv_mb93091_cb451;
464 clock_cmodes = clock_cmodes_fr405;
465 break;
466 default:
467 break;
468 }
469 break;
470
471 case PSR_IMPLE_FR501:
472 cpu_series = "fr500";
473 cpu_core = "fr501";
474 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
475
476 switch (PSR_VERSION(psr)) {
477 case PSR_VERSION_FR501_MB93501: cpu_silicon = "mb93501"; break;
478 case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break;
479 default:
480 break;
481 }
482 break;
483
484 case PSR_IMPLE_FR551:
485 cpu_series = "fr550";
486 cpu_core = "fr551";
487 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
488
489 switch (PSR_VERSION(psr)) {
490 case PSR_VERSION_FR551_MB93555:
491 cpu_silicon = "mb93555";
492 cpu_mmu = "Prot, SAT";
493 cpu_system = __frv_mb93091_cb41;
494 clock_cmodes = clock_cmodes_fr555;
495 clock_doubled = 1;
496 break;
497 default:
498 break;
499 }
500 break;
501
502 default:
503 break;
504 }
505
506 printk("- Series:%s CPU:%s Silicon:%s\n",
507 cpu_series, cpu_core, cpu_silicon);
508
509 #ifdef CONFIG_MB93091_VDK
510 detect_mb93091();
511 #endif
512
513 #if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493)
514 cpu_board2 = __frv_mb93493;
515 #endif
516
517 } /* end determine_cpu() */
518
519 /*****************************************************************************/
520 /*
521 * calculate the bus clock speed
522 */
523 void __pminit determine_clocks(int verbose)
524 {
525 const struct clock_cmode *mode, *tmode;
526 unsigned long clkc, psr, quot;
527
528 clkc = __get_CLKC();
529 psr = __get_PSR();
530
531 clock_p0_current = !!(clkc & CLKC_P0);
532 clock_cm_current = clkc & CLKC_CM;
533 clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s;
534
535 if (verbose)
536 printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc);
537
538 /* the CB70 has some alternative ways of setting the clock speed through switches accessed
539 * through the FPGA. */
540 if (cpu_system == __frv_mb93091_cb70) {
541 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
542
543 if (clkswr & 0x1000)
544 __clkin_clock_speed_HZ = 60000000UL;
545 else
546 __clkin_clock_speed_HZ =
547 ((clkswr >> 8) & 0xf) * 10000000 +
548 ((clkswr >> 4) & 0xf) * 1000000 +
549 ((clkswr ) & 0xf) * 100000;
550 }
551 /* the FR451 is currently fixed at 24MHz */
552 else if (cpu_system == __frv_mb93091_cb451) {
553 //__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA
554 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
555
556 if (clkswr & 0x1000)
557 __clkin_clock_speed_HZ = 60000000UL;
558 else
559 __clkin_clock_speed_HZ =
560 ((clkswr >> 8) & 0xf) * 10000000 +
561 ((clkswr >> 4) & 0xf) * 1000000 +
562 ((clkswr ) & 0xf) * 100000;
563 }
564 /* otherwise determine the clockspeed from VDK or other registers */
565 else {
566 __clkin_clock_speed_HZ = __get_CLKIN();
567 }
568
569 /* look up the appropriate clock relationships table entry */
570 mode = &undef_clock_cmode;
571 if (clock_cmodes) {
572 tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s];
573 if (tmode->xbus)
574 mode = tmode;
575 }
576
577 #define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f))
578
579 if (clock_doubled)
580 __clkin_clock_speed_HZ <<= 1;
581
582 __ext_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->xbus);
583 __sdram_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
584 __dsu_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->dsu);
585
586 switch (clkc & CLKC_CM) {
587 case 0: /* High */
588 __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->corebus);
589 __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->core);
590 break;
591 case 1: /* Medium */
592 __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
593 __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
594 break;
595 case 2: /* Low; not supported */
596 case 3: /* UNDEF */
597 printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM);
598 panic("Bye");
599 }
600
601 __res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ;
602 if (clkc & CLKC_P0)
603 __res_bus_clock_speed_HZ >>= 1;
604
605 if (verbose) {
606 printk("CLKIN: %lu.%3.3luMHz\n",
607 __clkin_clock_speed_HZ / 1000000,
608 (__clkin_clock_speed_HZ / 1000) % 1000);
609
610 printk("CLKS:"
611 " ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n",
612 __ext_bus_clock_speed_HZ / 1000000,
613 __res_bus_clock_speed_HZ / 1000000,
614 __sdram_clock_speed_HZ / 1000000,
615 __core_bus_clock_speed_HZ / 1000000,
616 __core_clock_speed_HZ / 1000000,
617 __dsu_clock_speed_HZ / 1000000
618 );
619 }
620
621 /* calculate the number of __delay() loop iterations per sec (2 insn loop) */
622 __delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2);
623
624 /* set the serial prescaler */
625 __serial_clock_speed_HZ = __res_bus_clock_speed_HZ;
626 quot = 1;
627 while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000)
628 quot += 1;
629
630 /* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable
631 * - we have to be careful - dividing too much can mean we can't get 115200 baud
632 */
633 if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0))
634 quot <<= 1;
635
636 __serial_clock_speed_HZ /= quot;
637 __frv_uart0.uartclk = __serial_clock_speed_HZ;
638 __frv_uart1.uartclk = __serial_clock_speed_HZ;
639
640 if (verbose)
641 printk(" uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot);
642
643 while (!(__get_UART0_LSR() & UART_LSR_TEMT))
644 continue;
645
646 while (!(__get_UART1_LSR() & UART_LSR_TEMT))
647 continue;
648
649 __set_UCPVR(quot);
650 __set_UCPSR(0);
651 } /* end determine_clocks() */
652
653 /*****************************************************************************/
654 /*
655 * reserve some DMA consistent memory
656 */
657 #ifdef CONFIG_RESERVE_DMA_COHERENT
658 static void __init reserve_dma_coherent(void)
659 {
660 unsigned long ampr;
661
662 /* find the first non-kernel memory tile and steal it */
663 #define __steal_AMPR(r) \
664 if (__get_DAMPR(r) & xAMPRx_V) { \
665 ampr = __get_DAMPR(r); \
666 __set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C); \
667 __set_IAMPR(r, 0); \
668 goto found; \
669 }
670
671 __steal_AMPR(1);
672 __steal_AMPR(2);
673 __steal_AMPR(3);
674 __steal_AMPR(4);
675 __steal_AMPR(5);
676 __steal_AMPR(6);
677
678 if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) {
679 __steal_AMPR(7);
680 __steal_AMPR(8);
681 __steal_AMPR(9);
682 __steal_AMPR(10);
683 __steal_AMPR(11);
684 __steal_AMPR(12);
685 __steal_AMPR(13);
686 __steal_AMPR(14);
687 }
688
689 /* unable to grant any DMA consistent memory */
690 printk("No DMA consistent memory reserved\n");
691 return;
692
693 found:
694 dma_coherent_mem_start = ampr & xAMPRx_PPFN;
695 ampr &= xAMPRx_SS;
696 ampr >>= 4;
697 ampr = 1 << (ampr - 3 + 20);
698 dma_coherent_mem_end = dma_coherent_mem_start + ampr;
699
700 printk("DMA consistent memory reserved %lx-%lx\n",
701 dma_coherent_mem_start, dma_coherent_mem_end);
702
703 } /* end reserve_dma_coherent() */
704 #endif
705
706 /*****************************************************************************/
707 /*
708 * calibrate the delay loop
709 */
710 void __cpuinit calibrate_delay(void)
711 {
712 loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ);
713
714 printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n",
715 loops_per_jiffy / (500000 / HZ),
716 (loops_per_jiffy / (5000 / HZ)) % 100);
717
718 } /* end calibrate_delay() */
719
720 /*****************************************************************************/
721 /*
722 * look through the command line for some things we need to know immediately
723 */
724 static void __init parse_cmdline_early(char *cmdline)
725 {
726 if (!cmdline)
727 return;
728
729 while (*cmdline) {
730 if (*cmdline == ' ')
731 cmdline++;
732
733 /* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
734 * out from the SDRAM controller mask register
735 */
736 if (!memcmp(cmdline, "mem=", 4)) {
737 unsigned long long mem_size;
738
739 mem_size = memparse(cmdline + 4, &cmdline);
740 memory_end = memory_start + mem_size;
741 }
742
743 while (*cmdline && *cmdline != ' ')
744 cmdline++;
745 }
746
747 } /* end parse_cmdline_early() */
748
749 /*****************************************************************************/
750 /*
751 *
752 */
753 void __init setup_arch(char **cmdline_p)
754 {
755 #ifdef CONFIG_MMU
756 printk("Linux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
757 #else
758 printk("uClinux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
759 #endif
760
761 memcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);
762
763 determine_cpu();
764 determine_clocks(1);
765
766 /* For printk-directly-beats-on-serial-hardware hack */
767 console_set_baud(115200);
768 #ifdef CONFIG_GDBSTUB
769 gdbstub_set_baud(115200);
770 #endif
771
772 #ifdef CONFIG_RESERVE_DMA_COHERENT
773 reserve_dma_coherent();
774 #endif
775 dump_memory_map();
776
777 #ifdef CONFIG_MB93090_MB00
778 if (mb93090_mb00_detected)
779 mb93090_display();
780 #endif
781
782 /* register those serial ports that are available */
783 #ifdef CONFIG_FRV_ONCPU_SERIAL
784 #ifndef CONFIG_GDBSTUB_UART0
785 __reg(UART0_BASE + UART_IER * 8) = 0;
786 early_serial_setup(&__frv_uart0);
787 #endif
788 #ifndef CONFIG_GDBSTUB_UART1
789 __reg(UART1_BASE + UART_IER * 8) = 0;
790 early_serial_setup(&__frv_uart1);
791 #endif
792 #endif
793
794 /* deal with the command line - RedBoot may have passed one to the kernel */
795 memcpy(command_line, boot_command_line, sizeof(command_line));
796 *cmdline_p = &command_line[0];
797 parse_cmdline_early(command_line);
798
799 /* set up the memory description
800 * - by now the stack is part of the init task */
801 printk("Memory %08lx-%08lx\n", memory_start, memory_end);
802
803 BUG_ON(memory_start == memory_end);
804
805 init_mm.start_code = (unsigned long) &_stext;
806 init_mm.end_code = (unsigned long) &_etext;
807 init_mm.end_data = (unsigned long) &_edata;
808 #if 0 /* DAVIDM - don't set brk just incase someone decides to use it */
809 init_mm.brk = (unsigned long) &_end;
810 #else
811 init_mm.brk = (unsigned long) 0;
812 #endif
813
814 #ifdef DEBUG
815 printk("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x BSS=0x%06x-0x%06x\n",
816 (int) &_stext, (int) &_etext,
817 (int) &_sdata, (int) &_edata,
818 (int) &_sbss, (int) &_ebss);
819 #endif
820
821 #ifdef CONFIG_VT
822 #if defined(CONFIG_VGA_CONSOLE)
823 conswitchp = &vga_con;
824 #elif defined(CONFIG_DUMMY_CONSOLE)
825 conswitchp = &dummy_con;
826 #endif
827 #endif
828
829 #ifdef CONFIG_MMU
830 setup_linux_memory();
831 #else
832 setup_uclinux_memory();
833 #endif
834
835 /* get kmalloc into gear */
836 paging_init();
837
838 /* init DMA */
839 frv_dma_init();
840 #ifdef DEBUG
841 printk("Done setup_arch\n");
842 #endif
843
844 /* start the decrement timer running */
845 // asm volatile("movgs %0,timerd" :: "r"(10000000));
846 // __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
847
848 } /* end setup_arch() */
849
850 #if 0
851 /*****************************************************************************/
852 /*
853 *
854 */
855 static int __devinit setup_arch_serial(void)
856 {
857 /* register those serial ports that are available */
858 #ifndef CONFIG_GDBSTUB_UART0
859 early_serial_setup(&__frv_uart0);
860 #endif
861 #ifndef CONFIG_GDBSTUB_UART1
862 early_serial_setup(&__frv_uart1);
863 #endif
864
865 return 0;
866 } /* end setup_arch_serial() */
867
868 late_initcall(setup_arch_serial);
869 #endif
870
871 /*****************************************************************************/
872 /*
873 * set up the memory map for normal MMU linux
874 */
875 #ifdef CONFIG_MMU
876 static void __init setup_linux_memory(void)
877 {
878 unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem;
879
880 kstart = (unsigned long) &__kernel_image_start - PAGE_OFFSET;
881 kend = (unsigned long) &__kernel_image_end - PAGE_OFFSET;
882
883 kstart = kstart & PAGE_MASK;
884 kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
885
886 /* give all the memory to the bootmap allocator, tell it to put the
887 * boot mem_map immediately following the kernel image
888 */
889 bootmap_size = init_bootmem_node(NODE_DATA(0),
890 kend >> PAGE_SHIFT, /* map addr */
891 memory_start >> PAGE_SHIFT, /* start of RAM */
892 memory_end >> PAGE_SHIFT /* end of RAM */
893 );
894
895 /* pass the memory that the kernel can immediately use over to the bootmem allocator */
896 max_mapnr = num_physpages = (memory_end - memory_start) >> PAGE_SHIFT;
897 low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT;
898 high_mem = 0;
899
900 if (num_physpages > low_top_pfn) {
901 #ifdef CONFIG_HIGHMEM
902 high_mem = num_physpages - low_top_pfn;
903 #else
904 max_mapnr = num_physpages = low_top_pfn;
905 #endif
906 }
907 else {
908 low_top_pfn = num_physpages;
909 }
910
911 min_low_pfn = memory_start >> PAGE_SHIFT;
912 max_low_pfn = low_top_pfn;
913 max_pfn = memory_end >> PAGE_SHIFT;
914
915 num_mappedpages = low_top_pfn;
916
917 printk(KERN_NOTICE "%ldMB LOWMEM available.\n", low_top_pfn >> (20 - PAGE_SHIFT));
918
919 free_bootmem(memory_start, low_top_pfn << PAGE_SHIFT);
920
921 #ifdef CONFIG_HIGHMEM
922 if (high_mem)
923 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", high_mem >> (20 - PAGE_SHIFT));
924 #endif
925
926 /* take back the memory occupied by the kernel image and the bootmem alloc map */
927 reserve_bootmem(kstart, kend - kstart + bootmap_size,
928 BOOTMEM_DEFAULT);
929
930 /* reserve the memory occupied by the initial ramdisk */
931 #ifdef CONFIG_BLK_DEV_INITRD
932 if (LOADER_TYPE && INITRD_START) {
933 if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) {
934 reserve_bootmem(INITRD_START, INITRD_SIZE,
935 BOOTMEM_DEFAULT);
936 initrd_start = INITRD_START + PAGE_OFFSET;
937 initrd_end = initrd_start + INITRD_SIZE;
938 }
939 else {
940 printk(KERN_ERR
941 "initrd extends beyond end of memory (0x%08lx > 0x%08lx)\n"
942 "disabling initrd\n",
943 INITRD_START + INITRD_SIZE,
944 low_top_pfn << PAGE_SHIFT);
945 initrd_start = 0;
946 }
947 }
948 #endif
949
950 } /* end setup_linux_memory() */
951 #endif
952
953 /*****************************************************************************/
954 /*
955 * set up the memory map for uClinux
956 */
957 #ifndef CONFIG_MMU
958 static void __init setup_uclinux_memory(void)
959 {
960 #ifdef CONFIG_PROTECT_KERNEL
961 unsigned long dampr;
962 #endif
963 unsigned long kend;
964 int bootmap_size;
965
966 kend = (unsigned long) &__kernel_image_end;
967 kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
968
969 /* give all the memory to the bootmap allocator, tell it to put the
970 * boot mem_map immediately following the kernel image
971 */
972 bootmap_size = init_bootmem_node(NODE_DATA(0),
973 kend >> PAGE_SHIFT, /* map addr */
974 memory_start >> PAGE_SHIFT, /* start of RAM */
975 memory_end >> PAGE_SHIFT /* end of RAM */
976 );
977
978 /* free all the usable memory */
979 free_bootmem(memory_start, memory_end - memory_start);
980
981 high_memory = (void *) (memory_end & PAGE_MASK);
982 max_mapnr = num_physpages = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
983
984 min_low_pfn = memory_start >> PAGE_SHIFT;
985 max_low_pfn = memory_end >> PAGE_SHIFT;
986 max_pfn = max_low_pfn;
987
988 /* now take back the bits the core kernel is occupying */
989 #ifndef CONFIG_PROTECT_KERNEL
990 reserve_bootmem(kend, bootmap_size, BOOTMEM_DEFAULT);
991 reserve_bootmem((unsigned long) &__kernel_image_start,
992 kend - (unsigned long) &__kernel_image_start,
993 BOOTMEM_DEFAULT);
994
995 #else
996 dampr = __get_DAMPR(0);
997 dampr &= xAMPRx_SS;
998 dampr = (dampr >> 4) + 17;
999 dampr = 1 << dampr;
1000
1001 reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr, BOOTMEM_DEFAULT);
1002 #endif
1003
1004 /* reserve some memory to do uncached DMA through if requested */
1005 #ifdef CONFIG_RESERVE_DMA_COHERENT
1006 if (dma_coherent_mem_start)
1007 reserve_bootmem(dma_coherent_mem_start,
1008 dma_coherent_mem_end - dma_coherent_mem_start,
1009 BOOTMEM_DEFAULT);
1010 #endif
1011
1012 } /* end setup_uclinux_memory() */
1013 #endif
1014
1015 /*****************************************************************************/
1016 /*
1017 * get CPU information for use by procfs
1018 */
1019 static int show_cpuinfo(struct seq_file *m, void *v)
1020 {
1021 const char *gr, *fr, *fm, *fp, *cm, *nem, *ble;
1022 #ifdef CONFIG_PM
1023 const char *sep;
1024 #endif
1025
1026 gr = cpu_hsr0_all & HSR0_GRHE ? "gr0-63" : "gr0-31";
1027 fr = cpu_hsr0_all & HSR0_FRHE ? "fr0-63" : "fr0-31";
1028 fm = cpu_psr_all & PSR_EM ? ", Media" : "";
1029 fp = cpu_psr_all & PSR_EF ? ", FPU" : "";
1030 cm = cpu_psr_all & PSR_CM ? ", CCCR" : "";
1031 nem = cpu_psr_all & PSR_NEM ? ", NE" : "";
1032 ble = cpu_psr_all & PSR_BE ? "BE" : "LE";
1033
1034 seq_printf(m,
1035 "CPU-Series:\t%s\n"
1036 "CPU-Core:\t%s, %s, %s%s%s\n"
1037 "CPU:\t\t%s\n"
1038 "MMU:\t\t%s\n"
1039 "FP-Media:\t%s%s%s\n"
1040 "System:\t\t%s",
1041 cpu_series,
1042 cpu_core, gr, ble, cm, nem,
1043 cpu_silicon,
1044 cpu_mmu,
1045 fr, fm, fp,
1046 cpu_system);
1047
1048 if (cpu_board1)
1049 seq_printf(m, ", %s", cpu_board1);
1050
1051 if (cpu_board2)
1052 seq_printf(m, ", %s", cpu_board2);
1053
1054 seq_printf(m, "\n");
1055
1056 #ifdef CONFIG_PM
1057 seq_printf(m, "PM-Controls:");
1058 sep = "\t";
1059
1060 if (clock_bits_settable & CLOCK_BIT_CMODE) {
1061 seq_printf(m, "%scmode=0x%04hx", sep, clock_cmodes_permitted);
1062 sep = ", ";
1063 }
1064
1065 if (clock_bits_settable & CLOCK_BIT_CM) {
1066 seq_printf(m, "%scm=0x%lx", sep, clock_bits_settable & CLOCK_BIT_CM);
1067 sep = ", ";
1068 }
1069
1070 if (clock_bits_settable & CLOCK_BIT_P0) {
1071 seq_printf(m, "%sp0=0x3", sep);
1072 sep = ", ";
1073 }
1074
1075 seq_printf(m, "%ssuspend=0x22\n", sep);
1076 #endif
1077
1078 seq_printf(m,
1079 "PM-Status:\tcmode=%d, cm=%d, p0=%d\n",
1080 clock_cmode_current, clock_cm_current, clock_p0_current);
1081
1082 #define print_clk(TAG, VAR) \
1083 seq_printf(m, "Clock-" TAG ":\t%lu.%2.2lu MHz\n", VAR / 1000000, (VAR / 10000) % 100)
1084
1085 print_clk("In", __clkin_clock_speed_HZ);
1086 print_clk("Core", __core_clock_speed_HZ);
1087 print_clk("SDRAM", __sdram_clock_speed_HZ);
1088 print_clk("CBus", __core_bus_clock_speed_HZ);
1089 print_clk("Res", __res_bus_clock_speed_HZ);
1090 print_clk("Ext", __ext_bus_clock_speed_HZ);
1091 print_clk("DSU", __dsu_clock_speed_HZ);
1092
1093 seq_printf(m,
1094 "BogoMips:\t%lu.%02lu\n",
1095 (loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100);
1096
1097 return 0;
1098 } /* end show_cpuinfo() */
1099
1100 static void *c_start(struct seq_file *m, loff_t *pos)
1101 {
1102 return *pos < NR_CPUS ? (void *) 0x12345678 : NULL;
1103 }
1104
1105 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1106 {
1107 ++*pos;
1108 return c_start(m, pos);
1109 }
1110
1111 static void c_stop(struct seq_file *m, void *v)
1112 {
1113 }
1114
1115 const struct seq_operations cpuinfo_op = {
1116 .start = c_start,
1117 .next = c_next,
1118 .stop = c_stop,
1119 .show = show_cpuinfo,
1120 };
1121
1122 void arch_gettod(int *year, int *mon, int *day, int *hour,
1123 int *min, int *sec)
1124 {
1125 *year = *mon = *day = *hour = *min = *sec = 0;
1126 }
1127
1128 /*****************************************************************************/
1129 /*
1130 *
1131 */
1132 #ifdef CONFIG_MB93090_MB00
1133 static void __init mb93090_sendlcdcmd(uint32_t cmd)
1134 {
1135 unsigned long base = __addr_LCD();
1136 int loop;
1137
1138 /* request reading of the busy flag */
1139 __set_LCD(base, LCD_CMD_READ_BUSY);
1140 __set_LCD(base, LCD_CMD_READ_BUSY & ~LCD_E);
1141
1142 /* wait for the busy flag to become clear */
1143 for (loop = 10000; loop > 0; loop--)
1144 if (!(__get_LCD(base) & 0x80))
1145 break;
1146
1147 /* send the command */
1148 __set_LCD(base, cmd);
1149 __set_LCD(base, cmd & ~LCD_E);
1150
1151 } /* end mb93090_sendlcdcmd() */
1152
1153 /*****************************************************************************/
1154 /*
1155 * write to the MB93090 LEDs and LCD
1156 */
1157 static void __init mb93090_display(void)
1158 {
1159 const char *p;
1160
1161 __set_LEDS(0);
1162
1163 /* set up the LCD */
1164 mb93090_sendlcdcmd(LCD_CMD_CLEAR);
1165 mb93090_sendlcdcmd(LCD_CMD_FUNCSET(1,1,0));
1166 mb93090_sendlcdcmd(LCD_CMD_ON(0,0));
1167 mb93090_sendlcdcmd(LCD_CMD_HOME);
1168
1169 mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(0));
1170 for (p = mb93090_banner; *p; p++)
1171 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1172
1173 mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(64));
1174 for (p = mb93090_version; *p; p++)
1175 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1176
1177 } /* end mb93090_display() */
1178
1179 #endif // CONFIG_MB93090_MB00
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