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Initial commit
[wrt350n-kernel.git] / arch / frv / kernel / setup.c
blob0669e13823831d5b994ac6daa439bd346f8943b1
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 <linux/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 <linux/blk.h>
50 #include <asm/pgtable.h>
51 #endif
52
53 #include "local.h"
54
55 #ifdef CONFIG_MB93090_MB00
56 static void __init mb93090_display(void);
57 #endif
58 #ifdef CONFIG_MMU
59 static void __init setup_linux_memory(void);
60 #else
61 static void __init setup_uclinux_memory(void);
62 #endif
63
64 #ifdef CONFIG_MB93090_MB00
65 static char __initdata mb93090_banner[] = "FJ/RH FR-V Linux";
66 static char __initdata mb93090_version[] = UTS_RELEASE;
67
68 int __nongprelbss mb93090_mb00_detected;
69 #endif
70
71 const char __frv_unknown_system[] = "unknown";
72 const char __frv_mb93091_cb10[] = "mb93091-cb10";
73 const char __frv_mb93091_cb11[] = "mb93091-cb11";
74 const char __frv_mb93091_cb30[] = "mb93091-cb30";
75 const char __frv_mb93091_cb41[] = "mb93091-cb41";
76 const char __frv_mb93091_cb60[] = "mb93091-cb60";
77 const char __frv_mb93091_cb70[] = "mb93091-cb70";
78 const char __frv_mb93091_cb451[] = "mb93091-cb451";
79 const char __frv_mb93090_mb00[] = "mb93090-mb00";
80
81 const char __frv_mb93493[] = "mb93493";
82
83 const char __frv_mb93093[] = "mb93093";
84
85 static const char *__nongprelbss cpu_series;
86 static const char *__nongprelbss cpu_core;
87 static const char *__nongprelbss cpu_silicon;
88 static const char *__nongprelbss cpu_mmu;
89 static const char *__nongprelbss cpu_system;
90 static const char *__nongprelbss cpu_board1;
91 static const char *__nongprelbss cpu_board2;
92
93 static unsigned long __nongprelbss cpu_psr_all;
94 static unsigned long __nongprelbss cpu_hsr0_all;
95
96 unsigned long __nongprelbss pdm_suspend_mode;
97
98 unsigned long __nongprelbss rom_length;
99 unsigned long __nongprelbss memory_start;
100 unsigned long __nongprelbss memory_end;
101
102 unsigned long __nongprelbss dma_coherent_mem_start;
103 unsigned long __nongprelbss dma_coherent_mem_end;
104
105 unsigned long __initdata __sdram_old_base;
106 unsigned long __initdata num_mappedpages;
107
108 struct cpuinfo_frv __nongprelbss boot_cpu_data;
109
110 char __initdata command_line[COMMAND_LINE_SIZE];
111 char __initdata redboot_command_line[COMMAND_LINE_SIZE];
112
113 #ifdef CONFIG_PM
114 #define __pminit
115 #define __pminitdata
116 #else
117 #define __pminit __init
118 #define __pminitdata __initdata
119 #endif
120
121 struct clock_cmode {
122 uint8_t xbus, sdram, corebus, core, dsu;
123 };
124
125 #define _frac(N,D) ((N)<<4 | (D))
126 #define _x0_16 _frac(1,6)
127 #define _x0_25 _frac(1,4)
128 #define _x0_33 _frac(1,3)
129 #define _x0_375 _frac(3,8)
130 #define _x0_5 _frac(1,2)
131 #define _x0_66 _frac(2,3)
132 #define _x0_75 _frac(3,4)
133 #define _x1 _frac(1,1)
134 #define _x1_5 _frac(3,2)
135 #define _x2 _frac(2,1)
136 #define _x3 _frac(3,1)
137 #define _x4 _frac(4,1)
138 #define _x4_5 _frac(9,2)
139 #define _x6 _frac(6,1)
140 #define _x8 _frac(8,1)
141 #define _x9 _frac(9,1)
142
143 int __nongprelbss clock_p0_current;
144 int __nongprelbss clock_cm_current;
145 int __nongprelbss clock_cmode_current;
146 #ifdef CONFIG_PM
147 int __nongprelbss clock_cmodes_permitted;
148 unsigned long __nongprelbss clock_bits_settable;
149 #endif
150
151 static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 };
152
153 static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = {
154 [4] = { _x1, _x1, _x2, _x2, _x0_25 },
155 [5] = { _x1, _x2, _x4, _x4, _x0_5 },
156 [8] = { _x1, _x1, _x1, _x2, _x0_25 },
157 [9] = { _x1, _x2, _x2, _x4, _x0_5 },
158 [11] = { _x1, _x4, _x4, _x8, _x1 },
159 [12] = { _x1, _x1, _x2, _x4, _x0_5 },
160 [13] = { _x1, _x2, _x4, _x8, _x1 },
161 };
162
163 static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = {
164 [0] = { _x1, _x1, _x1, _x1, _x0_5 },
165 [1] = { _x1, _x1, _x1, _x3, _x0_25 },
166 [2] = { _x1, _x1, _x2, _x6, _x0_5 },
167 [3] = { _x1, _x2, _x2, _x6, _x0_5 },
168 [4] = { _x1, _x1, _x2, _x2, _x0_16 },
169 [8] = { _x1, _x1, _x1, _x2, _x0_16 },
170 [9] = { _x1, _x2, _x2, _x4, _x0_33 },
171 [12] = { _x1, _x1, _x2, _x4, _x0_33 },
172 [14] = { _x1, _x3, _x3, _x9, _x0_75 },
173 [15] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
174
175 #define CLOCK_CMODES_PERMITTED_FR405 0xd31f
176 };
177
178 static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = {
179 [0] = { _x1, _x2, _x2, _x4, _x0_33 },
180 [1] = { _x1, _x3, _x3, _x6, _x0_5 },
181 [2] = { _x1, _x2, _x4, _x8, _x0_66 },
182 [3] = { _x1, _x1_5, _x3, _x6, _x0_5 },
183 [4] = { _x1, _x3, _x3, _x9, _x0_75 },
184 [5] = { _x1, _x2, _x2, _x6, _x0_5 },
185 [6] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
186 };
187
188 static const struct clock_cmode __pminitdata *clock_cmodes;
189 static int __pminitdata clock_doubled;
190
191 static struct uart_port __pminitdata __frv_uart0 = {
192 .uartclk = 0,
193 .membase = (char *) UART0_BASE,
194 .irq = IRQ_CPU_UART0,
195 .regshift = 3,
196 .iotype = UPIO_MEM,
197 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
198 };
199
200 static struct uart_port __pminitdata __frv_uart1 = {
201 .uartclk = 0,
202 .membase = (char *) UART1_BASE,
203 .irq = IRQ_CPU_UART1,
204 .regshift = 3,
205 .iotype = UPIO_MEM,
206 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
207 };
208
209 #if 0
210 static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n)
211 {
212 unsigned long phys, virt, cxn, size;
213
214 #ifdef CONFIG_MMU
215 virt = amlr & 0xffffc000;
216 cxn = amlr & 0x3fff;
217 #else
218 virt = ampr & 0xffffc000;
219 cxn = 0;
220 #endif
221 phys = ampr & xAMPRx_PPFN;
222 size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17);
223
224 printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n",
225 i_d, n,
226 virt, virt + size - 1,
227 phys,
228 ampr & xAMPRx_S ? 'S' : '-',
229 ampr & xAMPRx_C ? 'C' : '-',
230 ampr & DAMPRx_WP ? 'W' : '-',
231 ampr & xAMPRx_V ? 'V' : '-',
232 cxn
233 );
234 }
235 #endif
236
237 /*****************************************************************************/
238 /*
239 * dump the memory map
240 */
241 static void __init dump_memory_map(void)
242 {
243
244 #if 0
245 /* dump the protection map */
246 printk_xampr(__get_IAMPR(0), __get_IAMLR(0), 'I', 0);
247 printk_xampr(__get_IAMPR(1), __get_IAMLR(1), 'I', 1);
248 printk_xampr(__get_IAMPR(2), __get_IAMLR(2), 'I', 2);
249 printk_xampr(__get_IAMPR(3), __get_IAMLR(3), 'I', 3);
250 printk_xampr(__get_IAMPR(4), __get_IAMLR(4), 'I', 4);
251 printk_xampr(__get_IAMPR(5), __get_IAMLR(5), 'I', 5);
252 printk_xampr(__get_IAMPR(6), __get_IAMLR(6), 'I', 6);
253 printk_xampr(__get_IAMPR(7), __get_IAMLR(7), 'I', 7);
254 printk_xampr(__get_IAMPR(8), __get_IAMLR(8), 'I', 8);
255 printk_xampr(__get_IAMPR(9), __get_IAMLR(9), 'i', 9);
256 printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10);
257 printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11);
258 printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12);
259 printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13);
260 printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14);
261 printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15);
262
263 printk_xampr(__get_DAMPR(0), __get_DAMLR(0), 'D', 0);
264 printk_xampr(__get_DAMPR(1), __get_DAMLR(1), 'D', 1);
265 printk_xampr(__get_DAMPR(2), __get_DAMLR(2), 'D', 2);
266 printk_xampr(__get_DAMPR(3), __get_DAMLR(3), 'D', 3);
267 printk_xampr(__get_DAMPR(4), __get_DAMLR(4), 'D', 4);
268 printk_xampr(__get_DAMPR(5), __get_DAMLR(5), 'D', 5);
269 printk_xampr(__get_DAMPR(6), __get_DAMLR(6), 'D', 6);
270 printk_xampr(__get_DAMPR(7), __get_DAMLR(7), 'D', 7);
271 printk_xampr(__get_DAMPR(8), __get_DAMLR(8), 'D', 8);
272 printk_xampr(__get_DAMPR(9), __get_DAMLR(9), 'D', 9);
273 printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10);
274 printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11);
275 printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12);
276 printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13);
277 printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14);
278 printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15);
279 #endif
280
281 #if 0
282 /* dump the bus controller registers */
283 printk("LGCR: %08lx\n", __get_LGCR());
284 printk("Master: %08lx-%08lx CR=%08lx\n",
285 __get_LEMBR(), __get_LEMBR() + __get_LEMAM(),
286 __get_LMAICR());
287
288 int loop;
289 for (loop = 1; loop <= 7; loop++) {
290 unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop);
291 printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n",
292 loop,
293 lsbr, lsbr + __get_LSAM(loop),
294 lcr & 0x80000000 ? 'r' : '-',
295 lcr & 0x40000000 ? 'w' : '-',
296 lcr & 0x08000000 ? 'b' : '-',
297 lcr & 0x04000000 ? 'B' : '-',
298 lcr & 0x02000000 ? 'C' : '-',
299 lcr & 0x01000000 ? 'D' : '-',
300 lcr & 0x00800000 ? 'W' : '-',
301 lcr & 0x00400000 ? 'R' : '-',
302 (lcr & 0x00030000) == 0x00000000 ? '4' :
303 (lcr & 0x00030000) == 0x00010000 ? '2' :
304 (lcr & 0x00030000) == 0x00020000 ? '1' :
305 '-'
306 );
307 }
308 #endif
309
310 #if 0
311 printk("\n");
312 #endif
313 } /* end dump_memory_map() */
314
315 /*****************************************************************************/
316 /*
317 * attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system
318 */
319 #ifdef CONFIG_MB93091_VDK
320 static void __init detect_mb93091(void)
321 {
322 #ifdef CONFIG_MB93090_MB00
323 /* Detect CB70 without motherboard */
324 if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) {
325 cpu_board1 = __frv_mb93090_mb00;
326 mb93090_mb00_detected = 1;
327 }
328 #endif
329
330 #ifdef CONFIG_FUJITSU_MB93493
331 cpu_board2 = __frv_mb93493;
332 #endif
333
334 } /* end detect_mb93091() */
335 #endif
336
337 /*****************************************************************************/
338 /*
339 * determine the CPU type and set appropriate parameters
340 *
341 * Family Series CPU Core Silicon Imple Vers
342 * ----------------------------------------------------------
343 * FR-V --+-> FR400 --+-> FR401 --+-> MB93401 02 00 [1]
344 * | | |
345 * | | +-> MB93401/A 02 01
346 * | | |
347 * | | +-> MB93403 02 02
348 * | |
349 * | +-> FR405 ----> MB93405 04 00
350 * |
351 * +-> FR450 ----> FR451 ----> MB93451 05 00
352 * |
353 * +-> FR500 ----> FR501 --+-> MB93501 01 01 [2]
354 * | |
355 * | +-> MB93501/A 01 02
356 * |
357 * +-> FR550 --+-> FR551 ----> MB93555 03 01
358 *
359 * [1] The MB93401 is an obsolete CPU replaced by the MB93401A
360 * [2] The MB93501 is an obsolete CPU replaced by the MB93501A
361 *
362 * Imple is PSR(Processor Status Register)[31:28].
363 * Vers is PSR(Processor Status Register)[27:24].
364 *
365 * A "Silicon" consists of CPU core and some on-chip peripherals.
366 */
367 static void __init determine_cpu(void)
368 {
369 unsigned long hsr0 = __get_HSR(0);
370 unsigned long psr = __get_PSR();
371
372 /* work out what selectable services the CPU supports */
373 __set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM);
374 cpu_psr_all = __get_PSR();
375 __set_PSR(psr);
376
377 __set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE);
378 cpu_hsr0_all = __get_HSR(0);
379 __set_HSR(0, hsr0);
380
381 /* derive other service specs from the CPU type */
382 cpu_series = "unknown";
383 cpu_core = "unknown";
384 cpu_silicon = "unknown";
385 cpu_mmu = "Prot";
386 cpu_system = __frv_unknown_system;
387 clock_cmodes = NULL;
388 clock_doubled = 0;
389 #ifdef CONFIG_PM
390 clock_bits_settable = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0;
391 #endif
392
393 switch (PSR_IMPLE(psr)) {
394 case PSR_IMPLE_FR401:
395 cpu_series = "fr400";
396 cpu_core = "fr401";
397 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
398
399 switch (PSR_VERSION(psr)) {
400 case PSR_VERSION_FR401_MB93401:
401 cpu_silicon = "mb93401";
402 cpu_system = __frv_mb93091_cb10;
403 clock_cmodes = clock_cmodes_fr401_fr403;
404 clock_doubled = 1;
405 break;
406 case PSR_VERSION_FR401_MB93401A:
407 cpu_silicon = "mb93401/A";
408 cpu_system = __frv_mb93091_cb11;
409 clock_cmodes = clock_cmodes_fr401_fr403;
410 break;
411 case PSR_VERSION_FR401_MB93403:
412 cpu_silicon = "mb93403";
413 #ifndef CONFIG_MB93093_PDK
414 cpu_system = __frv_mb93091_cb30;
415 #else
416 cpu_system = __frv_mb93093;
417 #endif
418 clock_cmodes = clock_cmodes_fr401_fr403;
419 break;
420 default:
421 break;
422 }
423 break;
424
425 case PSR_IMPLE_FR405:
426 cpu_series = "fr400";
427 cpu_core = "fr405";
428 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
429
430 switch (PSR_VERSION(psr)) {
431 case PSR_VERSION_FR405_MB93405:
432 cpu_silicon = "mb93405";
433 cpu_system = __frv_mb93091_cb60;
434 clock_cmodes = clock_cmodes_fr405;
435 #ifdef CONFIG_PM
436 clock_bits_settable |= CLOCK_BIT_CMODE;
437 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
438 #endif
439
440 /* the FPGA on the CB70 has extra registers
441 * - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is
442 * how we tell the difference between it and a CB60
443 */
444 if (*(volatile unsigned short *) 0xffc001a0 == 0x0046)
445 cpu_system = __frv_mb93091_cb70;
446 break;
447 default:
448 break;
449 }
450 break;
451
452 case PSR_IMPLE_FR451:
453 cpu_series = "fr450";
454 cpu_core = "fr451";
455 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
456 #ifdef CONFIG_PM
457 clock_bits_settable |= CLOCK_BIT_CMODE;
458 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
459 #endif
460 switch (PSR_VERSION(psr)) {
461 case PSR_VERSION_FR451_MB93451:
462 cpu_silicon = "mb93451";
463 cpu_mmu = "Prot, SAT, xSAT, DAT";
464 cpu_system = __frv_mb93091_cb451;
465 clock_cmodes = clock_cmodes_fr405;
466 break;
467 default:
468 break;
469 }
470 break;
471
472 case PSR_IMPLE_FR501:
473 cpu_series = "fr500";
474 cpu_core = "fr501";
475 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
476
477 switch (PSR_VERSION(psr)) {
478 case PSR_VERSION_FR501_MB93501: cpu_silicon = "mb93501"; break;
479 case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break;
480 default:
481 break;
482 }
483 break;
484
485 case PSR_IMPLE_FR551:
486 cpu_series = "fr550";
487 cpu_core = "fr551";
488 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
489
490 switch (PSR_VERSION(psr)) {
491 case PSR_VERSION_FR551_MB93555:
492 cpu_silicon = "mb93555";
493 cpu_mmu = "Prot, SAT";
494 cpu_system = __frv_mb93091_cb41;
495 clock_cmodes = clock_cmodes_fr555;
496 clock_doubled = 1;
497 break;
498 default:
499 break;
500 }
501 break;
502
503 default:
504 break;
505 }
506
507 printk("- Series:%s CPU:%s Silicon:%s\n",
508 cpu_series, cpu_core, cpu_silicon);
509
510 #ifdef CONFIG_MB93091_VDK
511 detect_mb93091();
512 #endif
513
514 #if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493)
515 cpu_board2 = __frv_mb93493;
516 #endif
517
518 } /* end determine_cpu() */
519
520 /*****************************************************************************/
521 /*
522 * calculate the bus clock speed
523 */
524 void __pminit determine_clocks(int verbose)
525 {
526 const struct clock_cmode *mode, *tmode;
527 unsigned long clkc, psr, quot;
528
529 clkc = __get_CLKC();
530 psr = __get_PSR();
531
532 clock_p0_current = !!(clkc & CLKC_P0);
533 clock_cm_current = clkc & CLKC_CM;
534 clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s;
535
536 if (verbose)
537 printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc);
538
539 /* the CB70 has some alternative ways of setting the clock speed through switches accessed
540 * through the FPGA. */
541 if (cpu_system == __frv_mb93091_cb70) {
542 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
543
544 if (clkswr & 0x1000)
545 __clkin_clock_speed_HZ = 60000000UL;
546 else
547 __clkin_clock_speed_HZ =
548 ((clkswr >> 8) & 0xf) * 10000000 +
549 ((clkswr >> 4) & 0xf) * 1000000 +
550 ((clkswr ) & 0xf) * 100000;
551 }
552 /* the FR451 is currently fixed at 24MHz */
553 else if (cpu_system == __frv_mb93091_cb451) {
554 //__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA
555 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
556
557 if (clkswr & 0x1000)
558 __clkin_clock_speed_HZ = 60000000UL;
559 else
560 __clkin_clock_speed_HZ =
561 ((clkswr >> 8) & 0xf) * 10000000 +
562 ((clkswr >> 4) & 0xf) * 1000000 +
563 ((clkswr ) & 0xf) * 100000;
564 }
565 /* otherwise determine the clockspeed from VDK or other registers */
566 else {
567 __clkin_clock_speed_HZ = __get_CLKIN();
568 }
569
570 /* look up the appropriate clock relationships table entry */
571 mode = &undef_clock_cmode;
572 if (clock_cmodes) {
573 tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s];
574 if (tmode->xbus)
575 mode = tmode;
576 }
577
578 #define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f))
579
580 if (clock_doubled)
581 __clkin_clock_speed_HZ <<= 1;
582
583 __ext_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->xbus);
584 __sdram_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
585 __dsu_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->dsu);
586
587 switch (clkc & CLKC_CM) {
588 case 0: /* High */
589 __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->corebus);
590 __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->core);
591 break;
592 case 1: /* Medium */
593 __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
594 __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
595 break;
596 case 2: /* Low; not supported */
597 case 3: /* UNDEF */
598 printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM);
599 panic("Bye");
600 }
601
602 __res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ;
603 if (clkc & CLKC_P0)
604 __res_bus_clock_speed_HZ >>= 1;
605
606 if (verbose) {
607 printk("CLKIN: %lu.%3.3luMHz\n",
608 __clkin_clock_speed_HZ / 1000000,
609 (__clkin_clock_speed_HZ / 1000) % 1000);
610
611 printk("CLKS:"
612 " ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n",
613 __ext_bus_clock_speed_HZ / 1000000,
614 __res_bus_clock_speed_HZ / 1000000,
615 __sdram_clock_speed_HZ / 1000000,
616 __core_bus_clock_speed_HZ / 1000000,
617 __core_clock_speed_HZ / 1000000,
618 __dsu_clock_speed_HZ / 1000000
619 );
620 }
621
622 /* calculate the number of __delay() loop iterations per sec (2 insn loop) */
623 __delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2);
624
625 /* set the serial prescaler */
626 __serial_clock_speed_HZ = __res_bus_clock_speed_HZ;
627 quot = 1;
628 while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000)
629 quot += 1;
630
631 /* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable
632 * - we have to be careful - dividing too much can mean we can't get 115200 baud
633 */
634 if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0))
635 quot <<= 1;
636
637 __serial_clock_speed_HZ /= quot;
638 __frv_uart0.uartclk = __serial_clock_speed_HZ;
639 __frv_uart1.uartclk = __serial_clock_speed_HZ;
640
641 if (verbose)
642 printk(" uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot);
643
644 while (!(__get_UART0_LSR() & UART_LSR_TEMT))
645 continue;
646
647 while (!(__get_UART1_LSR() & UART_LSR_TEMT))
648 continue;
649
650 __set_UCPVR(quot);
651 __set_UCPSR(0);
652 } /* end determine_clocks() */
653
654 /*****************************************************************************/
655 /*
656 * reserve some DMA consistent memory
657 */
658 #ifdef CONFIG_RESERVE_DMA_COHERENT
659 static void __init reserve_dma_coherent(void)
660 {
661 unsigned long ampr;
662
663 /* find the first non-kernel memory tile and steal it */
664 #define __steal_AMPR(r) \
665 if (__get_DAMPR(r) & xAMPRx_V) { \
666 ampr = __get_DAMPR(r); \
667 __set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C); \
668 __set_IAMPR(r, 0); \
669 goto found; \
670 }
671
672 __steal_AMPR(1);
673 __steal_AMPR(2);
674 __steal_AMPR(3);
675 __steal_AMPR(4);
676 __steal_AMPR(5);
677 __steal_AMPR(6);
678
679 if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) {
680 __steal_AMPR(7);
681 __steal_AMPR(8);
682 __steal_AMPR(9);
683 __steal_AMPR(10);
684 __steal_AMPR(11);
685 __steal_AMPR(12);
686 __steal_AMPR(13);
687 __steal_AMPR(14);
688 }
689
690 /* unable to grant any DMA consistent memory */
691 printk("No DMA consistent memory reserved\n");
692 return;
693
694 found:
695 dma_coherent_mem_start = ampr & xAMPRx_PPFN;
696 ampr &= xAMPRx_SS;
697 ampr >>= 4;
698 ampr = 1 << (ampr - 3 + 20);
699 dma_coherent_mem_end = dma_coherent_mem_start + ampr;
700
701 printk("DMA consistent memory reserved %lx-%lx\n",
702 dma_coherent_mem_start, dma_coherent_mem_end);
703
704 } /* end reserve_dma_coherent() */
705 #endif
706
707 /*****************************************************************************/
708 /*
709 * calibrate the delay loop
710 */
711 void __cpuinit calibrate_delay(void)
712 {
713 loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ);
714
715 printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n",
716 loops_per_jiffy / (500000 / HZ),
717 (loops_per_jiffy / (5000 / HZ)) % 100);
718
719 } /* end calibrate_delay() */
720
721 /*****************************************************************************/
722 /*
723 * look through the command line for some things we need to know immediately
724 */
725 static void __init parse_cmdline_early(char *cmdline)
726 {
727 if (!cmdline)
728 return;
729
730 while (*cmdline) {
731 if (*cmdline == ' ')
732 cmdline++;
733
734 /* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
735 * out from the SDRAM controller mask register
736 */
737 if (!memcmp(cmdline, "mem=", 4)) {
738 unsigned long long mem_size;
739
740 mem_size = memparse(cmdline + 4, &cmdline);
741 memory_end = memory_start + mem_size;
742 }
743
744 while (*cmdline && *cmdline != ' ')
745 cmdline++;
746 }
747
748 } /* end parse_cmdline_early() */
749
750 /*****************************************************************************/
751 /*
752 *
753 */
754 void __init setup_arch(char **cmdline_p)
755 {
756 #ifdef CONFIG_MMU
757 printk("Linux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
758 #else
759 printk("uClinux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
760 #endif
761
762 memcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);
763
764 determine_cpu();
765 determine_clocks(1);
766
767 /* For printk-directly-beats-on-serial-hardware hack */
768 console_set_baud(115200);
769 #ifdef CONFIG_GDBSTUB
770 gdbstub_set_baud(115200);
771 #endif
772
773 #ifdef CONFIG_RESERVE_DMA_COHERENT
774 reserve_dma_coherent();
775 #endif
776 dump_memory_map();
777
778 #ifdef CONFIG_MB93090_MB00
779 if (mb93090_mb00_detected)
780 mb93090_display();
781 #endif
782
783 /* register those serial ports that are available */
784 #ifdef CONFIG_FRV_ONCPU_SERIAL
785 #ifndef CONFIG_GDBSTUB_UART0
786 __reg(UART0_BASE + UART_IER * 8) = 0;
787 early_serial_setup(&__frv_uart0);
788 #endif
789 #ifndef CONFIG_GDBSTUB_UART1
790 __reg(UART1_BASE + UART_IER * 8) = 0;
791 early_serial_setup(&__frv_uart1);
792 #endif
793 #endif
794
795 /* deal with the command line - RedBoot may have passed one to the kernel */
796 memcpy(command_line, boot_command_line, sizeof(command_line));
797 *cmdline_p = &command_line[0];
798 parse_cmdline_early(command_line);
799
800 /* set up the memory description
801 * - by now the stack is part of the init task */
802 printk("Memory %08lx-%08lx\n", memory_start, memory_end);
803
804 BUG_ON(memory_start == memory_end);
805
806 init_mm.start_code = (unsigned long) &_stext;
807 init_mm.end_code = (unsigned long) &_etext;
808 init_mm.end_data = (unsigned long) &_edata;
809 #if 0 /* DAVIDM - don't set brk just incase someone decides to use it */
810 init_mm.brk = (unsigned long) &_end;
811 #else
812 init_mm.brk = (unsigned long) 0;
813 #endif
814
815 #ifdef DEBUG
816 printk("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x BSS=0x%06x-0x%06x\n",
817 (int) &_stext, (int) &_etext,
818 (int) &_sdata, (int) &_edata,
819 (int) &_sbss, (int) &_ebss);
820 #endif
821
822 #ifdef CONFIG_VT
823 #if defined(CONFIG_VGA_CONSOLE)
824 conswitchp = &vga_con;
825 #elif defined(CONFIG_DUMMY_CONSOLE)
826 conswitchp = &dummy_con;
827 #endif
828 #endif
829
830 #ifdef CONFIG_MMU
831 setup_linux_memory();
832 #else
833 setup_uclinux_memory();
834 #endif
835
836 /* get kmalloc into gear */
837 paging_init();
838
839 /* init DMA */
840 frv_dma_init();
841 #ifdef DEBUG
842 printk("Done setup_arch\n");
843 #endif
844
845 /* start the decrement timer running */
846 // asm volatile("movgs %0,timerd" :: "r"(10000000));
847 // __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
848
849 } /* end setup_arch() */
850
851 #if 0
852 /*****************************************************************************/
853 /*
854 *
855 */
856 static int __devinit setup_arch_serial(void)
857 {
858 /* register those serial ports that are available */
859 #ifndef CONFIG_GDBSTUB_UART0
860 early_serial_setup(&__frv_uart0);
861 #endif
862 #ifndef CONFIG_GDBSTUB_UART1
863 early_serial_setup(&__frv_uart1);
864 #endif
865
866 return 0;
867 } /* end setup_arch_serial() */
868
869 late_initcall(setup_arch_serial);
870 #endif
871
872 /*****************************************************************************/
873 /*
874 * set up the memory map for normal MMU linux
875 */
876 #ifdef CONFIG_MMU
877 static void __init setup_linux_memory(void)
878 {
879 unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem;
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 = num_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 (num_physpages > low_top_pfn) {
902 #ifdef CONFIG_HIGHMEM
903 high_mem = num_physpages - low_top_pfn;
904 #else
905 max_mapnr = num_physpages = low_top_pfn;
906 #endif
907 }
908 else {
909 low_top_pfn = num_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 = num_physpages = ((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
WRT350N Kernel Patches