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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / arch / frv / kernel / setup.c
blob9f3a7a62d7873dc29caa8bf66eaa35a7489edf66
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 #define __pminitconst
116 #else
117 #define __pminit __init
118 #define __pminitdata __initdata
119 #define __pminitconst __initconst
120 #endif
121
122 struct clock_cmode {
123 uint8_t xbus, sdram, corebus, core, dsu;
124 };
125
126 #define _frac(N,D) ((N)<<4 | (D))
127 #define _x0_16 _frac(1,6)
128 #define _x0_25 _frac(1,4)
129 #define _x0_33 _frac(1,3)
130 #define _x0_375 _frac(3,8)
131 #define _x0_5 _frac(1,2)
132 #define _x0_66 _frac(2,3)
133 #define _x0_75 _frac(3,4)
134 #define _x1 _frac(1,1)
135 #define _x1_5 _frac(3,2)
136 #define _x2 _frac(2,1)
137 #define _x3 _frac(3,1)
138 #define _x4 _frac(4,1)
139 #define _x4_5 _frac(9,2)
140 #define _x6 _frac(6,1)
141 #define _x8 _frac(8,1)
142 #define _x9 _frac(9,1)
143
144 int __nongprelbss clock_p0_current;
145 int __nongprelbss clock_cm_current;
146 int __nongprelbss clock_cmode_current;
147 #ifdef CONFIG_PM
148 int __nongprelbss clock_cmodes_permitted;
149 unsigned long __nongprelbss clock_bits_settable;
150 #endif
151
152 static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 };
153
154 static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = {
155 [4] = { _x1, _x1, _x2, _x2, _x0_25 },
156 [5] = { _x1, _x2, _x4, _x4, _x0_5 },
157 [8] = { _x1, _x1, _x1, _x2, _x0_25 },
158 [9] = { _x1, _x2, _x2, _x4, _x0_5 },
159 [11] = { _x1, _x4, _x4, _x8, _x1 },
160 [12] = { _x1, _x1, _x2, _x4, _x0_5 },
161 [13] = { _x1, _x2, _x4, _x8, _x1 },
162 };
163
164 static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = {
165 [0] = { _x1, _x1, _x1, _x1, _x0_5 },
166 [1] = { _x1, _x1, _x1, _x3, _x0_25 },
167 [2] = { _x1, _x1, _x2, _x6, _x0_5 },
168 [3] = { _x1, _x2, _x2, _x6, _x0_5 },
169 [4] = { _x1, _x1, _x2, _x2, _x0_16 },
170 [8] = { _x1, _x1, _x1, _x2, _x0_16 },
171 [9] = { _x1, _x2, _x2, _x4, _x0_33 },
172 [12] = { _x1, _x1, _x2, _x4, _x0_33 },
173 [14] = { _x1, _x3, _x3, _x9, _x0_75 },
174 [15] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
175
176 #define CLOCK_CMODES_PERMITTED_FR405 0xd31f
177 };
178
179 static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = {
180 [0] = { _x1, _x2, _x2, _x4, _x0_33 },
181 [1] = { _x1, _x3, _x3, _x6, _x0_5 },
182 [2] = { _x1, _x2, _x4, _x8, _x0_66 },
183 [3] = { _x1, _x1_5, _x3, _x6, _x0_5 },
184 [4] = { _x1, _x3, _x3, _x9, _x0_75 },
185 [5] = { _x1, _x2, _x2, _x6, _x0_5 },
186 [6] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
187 };
188
189 static const struct clock_cmode __pminitconst *clock_cmodes;
190 static int __pminitdata clock_doubled;
191
192 static struct uart_port __pminitdata __frv_uart0 = {
193 .uartclk = 0,
194 .membase = (char *) UART0_BASE,
195 .irq = IRQ_CPU_UART0,
196 .regshift = 3,
197 .iotype = UPIO_MEM,
198 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
199 };
200
201 static struct uart_port __pminitdata __frv_uart1 = {
202 .uartclk = 0,
203 .membase = (char *) UART1_BASE,
204 .irq = IRQ_CPU_UART1,
205 .regshift = 3,
206 .iotype = UPIO_MEM,
207 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
208 };
209
210 #if 0
211 static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n)
212 {
213 unsigned long phys, virt, cxn, size;
214
215 #ifdef CONFIG_MMU
216 virt = amlr & 0xffffc000;
217 cxn = amlr & 0x3fff;
218 #else
219 virt = ampr & 0xffffc000;
220 cxn = 0;
221 #endif
222 phys = ampr & xAMPRx_PPFN;
223 size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17);
224
225 printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n",
226 i_d, n,
227 virt, virt + size - 1,
228 phys,
229 ampr & xAMPRx_S ? 'S' : '-',
230 ampr & xAMPRx_C ? 'C' : '-',
231 ampr & DAMPRx_WP ? 'W' : '-',
232 ampr & xAMPRx_V ? 'V' : '-',
233 cxn
234 );
235 }
236 #endif
237
238 /*****************************************************************************/
239 /*
240 * dump the memory map
241 */
242 static void __init dump_memory_map(void)
243 {
244
245 #if 0
246 /* dump the protection map */
247 printk_xampr(__get_IAMPR(0), __get_IAMLR(0), 'I', 0);
248 printk_xampr(__get_IAMPR(1), __get_IAMLR(1), 'I', 1);
249 printk_xampr(__get_IAMPR(2), __get_IAMLR(2), 'I', 2);
250 printk_xampr(__get_IAMPR(3), __get_IAMLR(3), 'I', 3);
251 printk_xampr(__get_IAMPR(4), __get_IAMLR(4), 'I', 4);
252 printk_xampr(__get_IAMPR(5), __get_IAMLR(5), 'I', 5);
253 printk_xampr(__get_IAMPR(6), __get_IAMLR(6), 'I', 6);
254 printk_xampr(__get_IAMPR(7), __get_IAMLR(7), 'I', 7);
255 printk_xampr(__get_IAMPR(8), __get_IAMLR(8), 'I', 8);
256 printk_xampr(__get_IAMPR(9), __get_IAMLR(9), 'i', 9);
257 printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10);
258 printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11);
259 printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12);
260 printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13);
261 printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14);
262 printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15);
263
264 printk_xampr(__get_DAMPR(0), __get_DAMLR(0), 'D', 0);
265 printk_xampr(__get_DAMPR(1), __get_DAMLR(1), 'D', 1);
266 printk_xampr(__get_DAMPR(2), __get_DAMLR(2), 'D', 2);
267 printk_xampr(__get_DAMPR(3), __get_DAMLR(3), 'D', 3);
268 printk_xampr(__get_DAMPR(4), __get_DAMLR(4), 'D', 4);
269 printk_xampr(__get_DAMPR(5), __get_DAMLR(5), 'D', 5);
270 printk_xampr(__get_DAMPR(6), __get_DAMLR(6), 'D', 6);
271 printk_xampr(__get_DAMPR(7), __get_DAMLR(7), 'D', 7);
272 printk_xampr(__get_DAMPR(8), __get_DAMLR(8), 'D', 8);
273 printk_xampr(__get_DAMPR(9), __get_DAMLR(9), 'D', 9);
274 printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10);
275 printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11);
276 printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12);
277 printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13);
278 printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14);
279 printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15);
280 #endif
281
282 #if 0
283 /* dump the bus controller registers */
284 printk("LGCR: %08lx\n", __get_LGCR());
285 printk("Master: %08lx-%08lx CR=%08lx\n",
286 __get_LEMBR(), __get_LEMBR() + __get_LEMAM(),
287 __get_LMAICR());
288
289 int loop;
290 for (loop = 1; loop <= 7; loop++) {
291 unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop);
292 printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n",
293 loop,
294 lsbr, lsbr + __get_LSAM(loop),
295 lcr & 0x80000000 ? 'r' : '-',
296 lcr & 0x40000000 ? 'w' : '-',
297 lcr & 0x08000000 ? 'b' : '-',
298 lcr & 0x04000000 ? 'B' : '-',
299 lcr & 0x02000000 ? 'C' : '-',
300 lcr & 0x01000000 ? 'D' : '-',
301 lcr & 0x00800000 ? 'W' : '-',
302 lcr & 0x00400000 ? 'R' : '-',
303 (lcr & 0x00030000) == 0x00000000 ? '4' :
304 (lcr & 0x00030000) == 0x00010000 ? '2' :
305 (lcr & 0x00030000) == 0x00020000 ? '1' :
306 '-'
307 );
308 }
309 #endif
310
311 #if 0
312 printk("\n");
313 #endif
314 } /* end dump_memory_map() */
315
316 /*****************************************************************************/
317 /*
318 * attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system
319 */
320 #ifdef CONFIG_MB93091_VDK
321 static void __init detect_mb93091(void)
322 {
323 #ifdef CONFIG_MB93090_MB00
324 /* Detect CB70 without motherboard */
325 if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) {
326 cpu_board1 = __frv_mb93090_mb00;
327 mb93090_mb00_detected = 1;
328 }
329 #endif
330
331 #ifdef CONFIG_FUJITSU_MB93493
332 cpu_board2 = __frv_mb93493;
333 #endif
334
335 } /* end detect_mb93091() */
336 #endif
337
338 /*****************************************************************************/
339 /*
340 * determine the CPU type and set appropriate parameters
341 *
342 * Family Series CPU Core Silicon Imple Vers
343 * ----------------------------------------------------------
344 * FR-V --+-> FR400 --+-> FR401 --+-> MB93401 02 00 [1]
345 * | | |
346 * | | +-> MB93401/A 02 01
347 * | | |
348 * | | +-> MB93403 02 02
349 * | |
350 * | +-> FR405 ----> MB93405 04 00
351 * |
352 * +-> FR450 ----> FR451 ----> MB93451 05 00
353 * |
354 * +-> FR500 ----> FR501 --+-> MB93501 01 01 [2]
355 * | |
356 * | +-> MB93501/A 01 02
357 * |
358 * +-> FR550 --+-> FR551 ----> MB93555 03 01
359 *
360 * [1] The MB93401 is an obsolete CPU replaced by the MB93401A
361 * [2] The MB93501 is an obsolete CPU replaced by the MB93501A
362 *
363 * Imple is PSR(Processor Status Register)[31:28].
364 * Vers is PSR(Processor Status Register)[27:24].
365 *
366 * A "Silicon" consists of CPU core and some on-chip peripherals.
367 */
368 static void __init determine_cpu(void)
369 {
370 unsigned long hsr0 = __get_HSR(0);
371 unsigned long psr = __get_PSR();
372
373 /* work out what selectable services the CPU supports */
374 __set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM);
375 cpu_psr_all = __get_PSR();
376 __set_PSR(psr);
377
378 __set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE);
379 cpu_hsr0_all = __get_HSR(0);
380 __set_HSR(0, hsr0);
381
382 /* derive other service specs from the CPU type */
383 cpu_series = "unknown";
384 cpu_core = "unknown";
385 cpu_silicon = "unknown";
386 cpu_mmu = "Prot";
387 cpu_system = __frv_unknown_system;
388 clock_cmodes = NULL;
389 clock_doubled = 0;
390 #ifdef CONFIG_PM
391 clock_bits_settable = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0;
392 #endif
393
394 switch (PSR_IMPLE(psr)) {
395 case PSR_IMPLE_FR401:
396 cpu_series = "fr400";
397 cpu_core = "fr401";
398 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
399
400 switch (PSR_VERSION(psr)) {
401 case PSR_VERSION_FR401_MB93401:
402 cpu_silicon = "mb93401";
403 cpu_system = __frv_mb93091_cb10;
404 clock_cmodes = clock_cmodes_fr401_fr403;
405 clock_doubled = 1;
406 break;
407 case PSR_VERSION_FR401_MB93401A:
408 cpu_silicon = "mb93401/A";
409 cpu_system = __frv_mb93091_cb11;
410 clock_cmodes = clock_cmodes_fr401_fr403;
411 break;
412 case PSR_VERSION_FR401_MB93403:
413 cpu_silicon = "mb93403";
414 #ifndef CONFIG_MB93093_PDK
415 cpu_system = __frv_mb93091_cb30;
416 #else
417 cpu_system = __frv_mb93093;
418 #endif
419 clock_cmodes = clock_cmodes_fr401_fr403;
420 break;
421 default:
422 break;
423 }
424 break;
425
426 case PSR_IMPLE_FR405:
427 cpu_series = "fr400";
428 cpu_core = "fr405";
429 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
430
431 switch (PSR_VERSION(psr)) {
432 case PSR_VERSION_FR405_MB93405:
433 cpu_silicon = "mb93405";
434 cpu_system = __frv_mb93091_cb60;
435 clock_cmodes = clock_cmodes_fr405;
436 #ifdef CONFIG_PM
437 clock_bits_settable |= CLOCK_BIT_CMODE;
438 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
439 #endif
440
441 /* the FPGA on the CB70 has extra registers
442 * - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is
443 * how we tell the difference between it and a CB60
444 */
445 if (*(volatile unsigned short *) 0xffc001a0 == 0x0046)
446 cpu_system = __frv_mb93091_cb70;
447 break;
448 default:
449 break;
450 }
451 break;
452
453 case PSR_IMPLE_FR451:
454 cpu_series = "fr450";
455 cpu_core = "fr451";
456 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
457 #ifdef CONFIG_PM
458 clock_bits_settable |= CLOCK_BIT_CMODE;
459 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
460 #endif
461 switch (PSR_VERSION(psr)) {
462 case PSR_VERSION_FR451_MB93451:
463 cpu_silicon = "mb93451";
464 cpu_mmu = "Prot, SAT, xSAT, DAT";
465 cpu_system = __frv_mb93091_cb451;
466 clock_cmodes = clock_cmodes_fr405;
467 break;
468 default:
469 break;
470 }
471 break;
472
473 case PSR_IMPLE_FR501:
474 cpu_series = "fr500";
475 cpu_core = "fr501";
476 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
477
478 switch (PSR_VERSION(psr)) {
479 case PSR_VERSION_FR501_MB93501: cpu_silicon = "mb93501"; break;
480 case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break;
481 default:
482 break;
483 }
484 break;
485
486 case PSR_IMPLE_FR551:
487 cpu_series = "fr550";
488 cpu_core = "fr551";
489 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
490
491 switch (PSR_VERSION(psr)) {
492 case PSR_VERSION_FR551_MB93555:
493 cpu_silicon = "mb93555";
494 cpu_mmu = "Prot, SAT";
495 cpu_system = __frv_mb93091_cb41;
496 clock_cmodes = clock_cmodes_fr555;
497 clock_doubled = 1;
498 break;
499 default:
500 break;
501 }
502 break;
503
504 default:
505 break;
506 }
507
508 printk("- Series:%s CPU:%s Silicon:%s\n",
509 cpu_series, cpu_core, cpu_silicon);
510
511 #ifdef CONFIG_MB93091_VDK
512 detect_mb93091();
513 #endif
514
515 #if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493)
516 cpu_board2 = __frv_mb93493;
517 #endif
518
519 } /* end determine_cpu() */
520
521 /*****************************************************************************/
522 /*
523 * calculate the bus clock speed
524 */
525 void __pminit determine_clocks(int verbose)
526 {
527 const struct clock_cmode *mode, *tmode;
528 unsigned long clkc, psr, quot;
529
530 clkc = __get_CLKC();
531 psr = __get_PSR();
532
533 clock_p0_current = !!(clkc & CLKC_P0);
534 clock_cm_current = clkc & CLKC_CM;
535 clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s;
536
537 if (verbose)
538 printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc);
539
540 /* the CB70 has some alternative ways of setting the clock speed through switches accessed
541 * through the FPGA. */
542 if (cpu_system == __frv_mb93091_cb70) {
543 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
544
545 if (clkswr & 0x1000)
546 __clkin_clock_speed_HZ = 60000000UL;
547 else
548 __clkin_clock_speed_HZ =
549 ((clkswr >> 8) & 0xf) * 10000000 +
550 ((clkswr >> 4) & 0xf) * 1000000 +
551 ((clkswr ) & 0xf) * 100000;
552 }
553 /* the FR451 is currently fixed at 24MHz */
554 else if (cpu_system == __frv_mb93091_cb451) {
555 //__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA
556 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
557
558 if (clkswr & 0x1000)
559 __clkin_clock_speed_HZ = 60000000UL;
560 else
561 __clkin_clock_speed_HZ =
562 ((clkswr >> 8) & 0xf) * 10000000 +
563 ((clkswr >> 4) & 0xf) * 1000000 +
564 ((clkswr ) & 0xf) * 100000;
565 }
566 /* otherwise determine the clockspeed from VDK or other registers */
567 else {
568 __clkin_clock_speed_HZ = __get_CLKIN();
569 }
570
571 /* look up the appropriate clock relationships table entry */
572 mode = &undef_clock_cmode;
573 if (clock_cmodes) {
574 tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s];
575 if (tmode->xbus)
576 mode = tmode;
577 }
578
579 #define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f))
580
581 if (clock_doubled)
582 __clkin_clock_speed_HZ <<= 1;
583
584 __ext_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->xbus);
585 __sdram_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
586 __dsu_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->dsu);
587
588 switch (clkc & CLKC_CM) {
589 case 0: /* High */
590 __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->corebus);
591 __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->core);
592 break;
593 case 1: /* Medium */
594 __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
595 __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
596 break;
597 case 2: /* Low; not supported */
598 case 3: /* UNDEF */
599 printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM);
600 panic("Bye");
601 }
602
603 __res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ;
604 if (clkc & CLKC_P0)
605 __res_bus_clock_speed_HZ >>= 1;
606
607 if (verbose) {
608 printk("CLKIN: %lu.%3.3luMHz\n",
609 __clkin_clock_speed_HZ / 1000000,
610 (__clkin_clock_speed_HZ / 1000) % 1000);
611
612 printk("CLKS:"
613 " ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n",
614 __ext_bus_clock_speed_HZ / 1000000,
615 __res_bus_clock_speed_HZ / 1000000,
616 __sdram_clock_speed_HZ / 1000000,
617 __core_bus_clock_speed_HZ / 1000000,
618 __core_clock_speed_HZ / 1000000,
619 __dsu_clock_speed_HZ / 1000000
620 );
621 }
622
623 /* calculate the number of __delay() loop iterations per sec (2 insn loop) */
624 __delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2);
625
626 /* set the serial prescaler */
627 __serial_clock_speed_HZ = __res_bus_clock_speed_HZ;
628 quot = 1;
629 while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000)
630 quot += 1;
631
632 /* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable
633 * - we have to be careful - dividing too much can mean we can't get 115200 baud
634 */
635 if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0))
636 quot <<= 1;
637
638 __serial_clock_speed_HZ /= quot;
639 __frv_uart0.uartclk = __serial_clock_speed_HZ;
640 __frv_uart1.uartclk = __serial_clock_speed_HZ;
641
642 if (verbose)
643 printk(" uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot);
644
645 while (!(__get_UART0_LSR() & UART_LSR_TEMT))
646 continue;
647
648 while (!(__get_UART1_LSR() & UART_LSR_TEMT))
649 continue;
650
651 __set_UCPVR(quot);
652 __set_UCPSR(0);
653 } /* end determine_clocks() */
654
655 /*****************************************************************************/
656 /*
657 * reserve some DMA consistent memory
658 */
659 #ifdef CONFIG_RESERVE_DMA_COHERENT
660 static void __init reserve_dma_coherent(void)
661 {
662 unsigned long ampr;
663
664 /* find the first non-kernel memory tile and steal it */
665 #define __steal_AMPR(r) \
666 if (__get_DAMPR(r) & xAMPRx_V) { \
667 ampr = __get_DAMPR(r); \
668 __set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C); \
669 __set_IAMPR(r, 0); \
670 goto found; \
671 }
672
673 __steal_AMPR(1);
674 __steal_AMPR(2);
675 __steal_AMPR(3);
676 __steal_AMPR(4);
677 __steal_AMPR(5);
678 __steal_AMPR(6);
679
680 if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) {
681 __steal_AMPR(7);
682 __steal_AMPR(8);
683 __steal_AMPR(9);
684 __steal_AMPR(10);
685 __steal_AMPR(11);
686 __steal_AMPR(12);
687 __steal_AMPR(13);
688 __steal_AMPR(14);
689 }
690
691 /* unable to grant any DMA consistent memory */
692 printk("No DMA consistent memory reserved\n");
693 return;
694
695 found:
696 dma_coherent_mem_start = ampr & xAMPRx_PPFN;
697 ampr &= xAMPRx_SS;
698 ampr >>= 4;
699 ampr = 1 << (ampr - 3 + 20);
700 dma_coherent_mem_end = dma_coherent_mem_start + ampr;
701
702 printk("DMA consistent memory reserved %lx-%lx\n",
703 dma_coherent_mem_start, dma_coherent_mem_end);
704
705 } /* end reserve_dma_coherent() */
706 #endif
707
708 /*****************************************************************************/
709 /*
710 * calibrate the delay loop
711 */
712 void calibrate_delay(void)
713 {
714 loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ);
715
716 printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n",
717 loops_per_jiffy / (500000 / HZ),
718 (loops_per_jiffy / (5000 / HZ)) % 100);
719
720 } /* end calibrate_delay() */
721
722 /*****************************************************************************/
723 /*
724 * look through the command line for some things we need to know immediately
725 */
726 static void __init parse_cmdline_early(char *cmdline)
727 {
728 if (!cmdline)
729 return;
730
731 while (*cmdline) {
732 if (*cmdline == ' ')
733 cmdline++;
734
735 /* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
736 * out from the SDRAM controller mask register
737 */
738 if (!strncmp(cmdline, "mem=", 4)) {
739 unsigned long long mem_size;
740
741 mem_size = memparse(cmdline + 4, &cmdline);
742 memory_end = memory_start + mem_size;
743 }
744
745 while (*cmdline && *cmdline != ' ')
746 cmdline++;
747 }
748
749 } /* end parse_cmdline_early() */
750
751 /*****************************************************************************/
752 /*
753 *
754 */
755 void __init setup_arch(char **cmdline_p)
756 {
757 #ifdef CONFIG_MMU
758 printk("Linux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
759 #else
760 printk("uClinux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
761 #endif
762
763 memcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);
764
765 determine_cpu();
766 determine_clocks(1);
767
768 /* For printk-directly-beats-on-serial-hardware hack */
769 console_set_baud(115200);
770 #ifdef CONFIG_GDBSTUB
771 gdbstub_set_baud(115200);
772 #endif
773
774 #ifdef CONFIG_RESERVE_DMA_COHERENT
775 reserve_dma_coherent();
776 #endif
777 dump_memory_map();
778
779 #ifdef CONFIG_MB93090_MB00
780 if (mb93090_mb00_detected)
781 mb93090_display();
782 #endif
783
784 /* register those serial ports that are available */
785 #ifdef CONFIG_FRV_ONCPU_SERIAL
786 #ifndef CONFIG_GDBSTUB_UART0
787 __reg(UART0_BASE + UART_IER * 8) = 0;
788 early_serial_setup(&__frv_uart0);
789 #endif
790 #ifndef CONFIG_GDBSTUB_UART1
791 __reg(UART1_BASE + UART_IER * 8) = 0;
792 early_serial_setup(&__frv_uart1);
793 #endif
794 #endif
795
796 /* deal with the command line - RedBoot may have passed one to the kernel */
797 memcpy(command_line, boot_command_line, sizeof(command_line));
798 *cmdline_p = &command_line[0];
799 parse_cmdline_early(command_line);
800
801 /* set up the memory description
802 * - by now the stack is part of the init task */
803 printk("Memory %08lx-%08lx\n", memory_start, memory_end);
804
805 BUG_ON(memory_start == memory_end);
806
807 init_mm.start_code = (unsigned long) _stext;
808 init_mm.end_code = (unsigned long) _etext;
809 init_mm.end_data = (unsigned long) _edata;
810 #if 0 /* DAVIDM - don't set brk just incase someone decides to use it */
811 init_mm.brk = (unsigned long) &_end;
812 #else
813 init_mm.brk = (unsigned long) 0;
814 #endif
815
816 #ifdef DEBUG
817 printk("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
818 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
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 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 unsigned long physpages;
880
881 kstart = (unsigned long) &__kernel_image_start - PAGE_OFFSET;
882 kend = (unsigned long) &__kernel_image_end - PAGE_OFFSET;
883
884 kstart = kstart & PAGE_MASK;
885 kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
886
887 /* give all the memory to the bootmap allocator, tell it to put the
888 * boot mem_map immediately following the kernel image
889 */
890 bootmap_size = init_bootmem_node(NODE_DATA(0),
891 kend >> PAGE_SHIFT, /* map addr */
892 memory_start >> PAGE_SHIFT, /* start of RAM */
893 memory_end >> PAGE_SHIFT /* end of RAM */
894 );
895
896 /* pass the memory that the kernel can immediately use over to the bootmem allocator */
897 max_mapnr = physpages = (memory_end - memory_start) >> PAGE_SHIFT;
898 low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT;
899 high_mem = 0;
900
901 if (physpages > low_top_pfn) {
902 #ifdef CONFIG_HIGHMEM
903 high_mem = physpages - low_top_pfn;
904 #else
905 max_mapnr = physpages = low_top_pfn;
906 #endif
907 }
908 else {
909 low_top_pfn = physpages;
910 }
911
912 min_low_pfn = memory_start >> PAGE_SHIFT;
913 max_low_pfn = low_top_pfn;
914 max_pfn = memory_end >> PAGE_SHIFT;
915
916 num_mappedpages = low_top_pfn;
917
918 printk(KERN_NOTICE "%ldMB LOWMEM available.\n", low_top_pfn >> (20 - PAGE_SHIFT));
919
920 free_bootmem(memory_start, low_top_pfn << PAGE_SHIFT);
921
922 #ifdef CONFIG_HIGHMEM
923 if (high_mem)
924 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", high_mem >> (20 - PAGE_SHIFT));
925 #endif
926
927 /* take back the memory occupied by the kernel image and the bootmem alloc map */
928 reserve_bootmem(kstart, kend - kstart + bootmap_size,
929 BOOTMEM_DEFAULT);
930
931 /* reserve the memory occupied by the initial ramdisk */
932 #ifdef CONFIG_BLK_DEV_INITRD
933 if (LOADER_TYPE && INITRD_START) {
934 if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) {
935 reserve_bootmem(INITRD_START, INITRD_SIZE,
936 BOOTMEM_DEFAULT);
937 initrd_start = INITRD_START + PAGE_OFFSET;
938 initrd_end = initrd_start + INITRD_SIZE;
939 }
940 else {
941 printk(KERN_ERR
942 "initrd extends beyond end of memory (0x%08lx > 0x%08lx)\n"
943 "disabling initrd\n",
944 INITRD_START + INITRD_SIZE,
945 low_top_pfn << PAGE_SHIFT);
946 initrd_start = 0;
947 }
948 }
949 #endif
950
951 } /* end setup_linux_memory() */
952 #endif
953
954 /*****************************************************************************/
955 /*
956 * set up the memory map for uClinux
957 */
958 #ifndef CONFIG_MMU
959 static void __init setup_uclinux_memory(void)
960 {
961 #ifdef CONFIG_PROTECT_KERNEL
962 unsigned long dampr;
963 #endif
964 unsigned long kend;
965 int bootmap_size;
966
967 kend = (unsigned long) &__kernel_image_end;
968 kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
969
970 /* give all the memory to the bootmap allocator, tell it to put the
971 * boot mem_map immediately following the kernel image
972 */
973 bootmap_size = init_bootmem_node(NODE_DATA(0),
974 kend >> PAGE_SHIFT, /* map addr */
975 memory_start >> PAGE_SHIFT, /* start of RAM */
976 memory_end >> PAGE_SHIFT /* end of RAM */
977 );
978
979 /* free all the usable memory */
980 free_bootmem(memory_start, memory_end - memory_start);
981
982 high_memory = (void *) (memory_end & PAGE_MASK);
983 max_mapnr = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
984
985 min_low_pfn = memory_start >> PAGE_SHIFT;
986 max_low_pfn = memory_end >> PAGE_SHIFT;
987 max_pfn = max_low_pfn;
988
989 /* now take back the bits the core kernel is occupying */
990 #ifndef CONFIG_PROTECT_KERNEL
991 reserve_bootmem(kend, bootmap_size, BOOTMEM_DEFAULT);
992 reserve_bootmem((unsigned long) &__kernel_image_start,
993 kend - (unsigned long) &__kernel_image_start,
994 BOOTMEM_DEFAULT);
995
996 #else
997 dampr = __get_DAMPR(0);
998 dampr &= xAMPRx_SS;
999 dampr = (dampr >> 4) + 17;
1000 dampr = 1 << dampr;
1001
1002 reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr, BOOTMEM_DEFAULT);
1003 #endif
1004
1005 /* reserve some memory to do uncached DMA through if requested */
1006 #ifdef CONFIG_RESERVE_DMA_COHERENT
1007 if (dma_coherent_mem_start)
1008 reserve_bootmem(dma_coherent_mem_start,
1009 dma_coherent_mem_end - dma_coherent_mem_start,
1010 BOOTMEM_DEFAULT);
1011 #endif
1012
1013 } /* end setup_uclinux_memory() */
1014 #endif
1015
1016 /*****************************************************************************/
1017 /*
1018 * get CPU information for use by procfs
1019 */
1020 static int show_cpuinfo(struct seq_file *m, void *v)
1021 {
1022 const char *gr, *fr, *fm, *fp, *cm, *nem, *ble;
1023 #ifdef CONFIG_PM
1024 const char *sep;
1025 #endif
1026
1027 gr = cpu_hsr0_all & HSR0_GRHE ? "gr0-63" : "gr0-31";
1028 fr = cpu_hsr0_all & HSR0_FRHE ? "fr0-63" : "fr0-31";
1029 fm = cpu_psr_all & PSR_EM ? ", Media" : "";
1030 fp = cpu_psr_all & PSR_EF ? ", FPU" : "";
1031 cm = cpu_psr_all & PSR_CM ? ", CCCR" : "";
1032 nem = cpu_psr_all & PSR_NEM ? ", NE" : "";
1033 ble = cpu_psr_all & PSR_BE ? "BE" : "LE";
1034
1035 seq_printf(m,
1036 "CPU-Series:\t%s\n"
1037 "CPU-Core:\t%s, %s, %s%s%s\n"
1038 "CPU:\t\t%s\n"
1039 "MMU:\t\t%s\n"
1040 "FP-Media:\t%s%s%s\n"
1041 "System:\t\t%s",
1042 cpu_series,
1043 cpu_core, gr, ble, cm, nem,
1044 cpu_silicon,
1045 cpu_mmu,
1046 fr, fm, fp,
1047 cpu_system);
1048
1049 if (cpu_board1)
1050 seq_printf(m, ", %s", cpu_board1);
1051
1052 if (cpu_board2)
1053 seq_printf(m, ", %s", cpu_board2);
1054
1055 seq_printf(m, "\n");
1056
1057 #ifdef CONFIG_PM
1058 seq_printf(m, "PM-Controls:");
1059 sep = "\t";
1060
1061 if (clock_bits_settable & CLOCK_BIT_CMODE) {
1062 seq_printf(m, "%scmode=0x%04hx", sep, clock_cmodes_permitted);
1063 sep = ", ";
1064 }
1065
1066 if (clock_bits_settable & CLOCK_BIT_CM) {
1067 seq_printf(m, "%scm=0x%lx", sep, clock_bits_settable & CLOCK_BIT_CM);
1068 sep = ", ";
1069 }
1070
1071 if (clock_bits_settable & CLOCK_BIT_P0) {
1072 seq_printf(m, "%sp0=0x3", sep);
1073 sep = ", ";
1074 }
1075
1076 seq_printf(m, "%ssuspend=0x22\n", sep);
1077 #endif
1078
1079 seq_printf(m,
1080 "PM-Status:\tcmode=%d, cm=%d, p0=%d\n",
1081 clock_cmode_current, clock_cm_current, clock_p0_current);
1082
1083 #define print_clk(TAG, VAR) \
1084 seq_printf(m, "Clock-" TAG ":\t%lu.%2.2lu MHz\n", VAR / 1000000, (VAR / 10000) % 100)
1085
1086 print_clk("In", __clkin_clock_speed_HZ);
1087 print_clk("Core", __core_clock_speed_HZ);
1088 print_clk("SDRAM", __sdram_clock_speed_HZ);
1089 print_clk("CBus", __core_bus_clock_speed_HZ);
1090 print_clk("Res", __res_bus_clock_speed_HZ);
1091 print_clk("Ext", __ext_bus_clock_speed_HZ);
1092 print_clk("DSU", __dsu_clock_speed_HZ);
1093
1094 seq_printf(m,
1095 "BogoMips:\t%lu.%02lu\n",
1096 (loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100);
1097
1098 return 0;
1099 } /* end show_cpuinfo() */
1100
1101 static void *c_start(struct seq_file *m, loff_t *pos)
1102 {
1103 return *pos < NR_CPUS ? (void *) 0x12345678 : NULL;
1104 }
1105
1106 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1107 {
1108 ++*pos;
1109 return c_start(m, pos);
1110 }
1111
1112 static void c_stop(struct seq_file *m, void *v)
1113 {
1114 }
1115
1116 const struct seq_operations cpuinfo_op = {
1117 .start = c_start,
1118 .next = c_next,
1119 .stop = c_stop,
1120 .show = show_cpuinfo,
1121 };
1122
1123 void arch_gettod(int *year, int *mon, int *day, int *hour,
1124 int *min, int *sec)
1125 {
1126 *year = *mon = *day = *hour = *min = *sec = 0;
1127 }
1128
1129 /*****************************************************************************/
1130 /*
1131 *
1132 */
1133 #ifdef CONFIG_MB93090_MB00
1134 static void __init mb93090_sendlcdcmd(uint32_t cmd)
1135 {
1136 unsigned long base = __addr_LCD();
1137 int loop;
1138
1139 /* request reading of the busy flag */
1140 __set_LCD(base, LCD_CMD_READ_BUSY);
1141 __set_LCD(base, LCD_CMD_READ_BUSY & ~LCD_E);
1142
1143 /* wait for the busy flag to become clear */
1144 for (loop = 10000; loop > 0; loop--)
1145 if (!(__get_LCD(base) & 0x80))
1146 break;
1147
1148 /* send the command */
1149 __set_LCD(base, cmd);
1150 __set_LCD(base, cmd & ~LCD_E);
1151
1152 } /* end mb93090_sendlcdcmd() */
1153
1154 /*****************************************************************************/
1155 /*
1156 * write to the MB93090 LEDs and LCD
1157 */
1158 static void __init mb93090_display(void)
1159 {
1160 const char *p;
1161
1162 __set_LEDS(0);
1163
1164 /* set up the LCD */
1165 mb93090_sendlcdcmd(LCD_CMD_CLEAR);
1166 mb93090_sendlcdcmd(LCD_CMD_FUNCSET(1,1,0));
1167 mb93090_sendlcdcmd(LCD_CMD_ON(0,0));
1168 mb93090_sendlcdcmd(LCD_CMD_HOME);
1169
1170 mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(0));
1171 for (p = mb93090_banner; *p; p++)
1172 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1173
1174 mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(64));
1175 for (p = mb93090_version; *p; p++)
1176 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1177
1178 } /* end mb93090_display() */
1179
1180 #endif // CONFIG_MB93090_MB00
Linux with added FPC-III support