1 /*
2 * linux/arch/ppc/kernel/setup.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 * Adapted from 'alpha' version by Gary Thomas
6 * Modified by Cort Dougan (cort@cs.nmt.edu)
7 * Modified by PPC64 Team, IBM Corp
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15 /*
16 * bootup setup stuff..
17 */
18
19 #include <linux/config.h>
20 #include <linux/errno.h>
21 #include <linux/sched.h>
22 #include <linux/kernel.h>
23 #include <linux/mm.h>
24 #include <linux/stddef.h>
25 #include <linux/unistd.h>
26 #include <linux/ptrace.h>
27 #include <linux/slab.h>
28 #include <linux/user.h>
29 #include <linux/a.out.h>
30 #include <linux/tty.h>
31 #include <linux/major.h>
32 #include <linux/interrupt.h>
33 #include <linux/reboot.h>
34 #include <linux/init.h>
35 #include <linux/blk.h>
36 #include <linux/ioport.h>
37 #include <linux/console.h>
38 #include <linux/pci.h>
39 #include <linux/version.h>
40 #include <linux/adb.h>
41 #include <linux/module.h>
42 #include <linux/delay.h>
43
44 #include <linux/irq.h>
45 #include <linux/seq_file.h>
46
47 #include <asm/mmu.h>
48 #include <asm/processor.h>
49 #include <asm/io.h>
50 #include <asm/pgtable.h>
51 #include <asm/prom.h>
52 #include <asm/rtas.h>
53 #include <asm/pci-bridge.h>
54 #include <asm/pci_dma.h>
55 #include <asm/dma.h>
56 #include <asm/machdep.h>
57 #include <asm/irq.h>
58 #include <asm/keyboard.h>
59 #include <asm/init.h>
60 #include <asm/naca.h>
61 #include <asm/time.h>
62
63 #include "local_irq.h"
64 #include "i8259.h"
65 #include "open_pic.h"
66 #include "xics.h"
67 #include <asm/ppcdebug.h>
68 #include <asm/cputable.h>
69
70 extern volatile unsigned char *chrp_int_ack_special;
71
72 void chrp_setup_pci_ptrs(void);
73 void chrp_progress(char *, unsigned short);
74 void chrp_request_regions(void);
75
76 extern int pckbd_setkeycode(unsigned int scancode, unsigned int keycode);
77 extern int pckbd_getkeycode(unsigned int scancode);
78 extern int pckbd_translate(unsigned char scancode, unsigned char *keycode,
79 char raw_mode);
80 extern char pckbd_unexpected_up(unsigned char keycode);
81 extern void pckbd_leds(unsigned char leds);
82 extern void pckbd_init_hw(void);
83 extern unsigned char pckbd_sysrq_xlate[128];
84 extern void openpic_init_IRQ(void);
85 extern void openpic_init_irq_desc(irq_desc_t *);
86 extern void init_ras_IRQ(void);
87
88 extern void find_and_init_phbs(void);
89 extern void pSeries_pcibios_fixup(void);
90 extern void iSeries_pcibios_fixup(void);
91
92 extern void pSeries_get_boot_time(struct rtc_time *rtc_time);
93 extern void pSeries_get_rtc_time(struct rtc_time *rtc_time);
94 extern int pSeries_set_rtc_time(struct rtc_time *rtc_time);
95 void pSeries_calibrate_decr(void);
96 static void machine_check_init(void);
97 extern void SystemReset_FWNMI(void), MachineCheck_FWNMI(void); /* from head.S */
98 int fwnmi_active = 0; /* TRUE if an FWNMI handler is present */
99 int check_exception_flag = 0; /* TRUE if a check-exception handler present */
100
101 kdev_t boot_dev;
102 unsigned long virtPython0Facilities = 0; // python0 facility area (memory mapped io) (64-bit format) VIRTUAL address.
103
104 extern HPTE *Hash, *Hash_end;
105 extern unsigned long Hash_size, Hash_mask;
106 extern int probingmem;
107 extern unsigned long loops_per_jiffy;
108
109 extern unsigned long ppc_proc_freq;
110 extern unsigned long ppc_tb_freq;
111 #ifdef CONFIG_BLK_DEV_RAM
112 extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */
113 extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */
114 extern int rd_image_start; /* starting block # of image */
115 #endif
116
117 void
chrp_get_cpuinfo(struct seq_file * m)118 chrp_get_cpuinfo(struct seq_file *m)
119 {
120 struct device_node *root;
121 const char *model = "";
122
123 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
124
125 root = find_path_device("/");
126 if (root)
127 model = get_property(root, "model", NULL);
128 seq_printf(m, "machine\t\t: CHRP %s\n", model);
129 }
130
chrp_request_regions(void)131 void __init chrp_request_regions(void) {
132 request_region(0x20,0x20,"pic1");
133 request_region(0xa0,0x20,"pic2");
134 request_region(0x00,0x20,"dma1");
135 request_region(0x40,0x20,"timer");
136 request_region(0x80,0x10,"dma page reg");
137 request_region(0xc0,0x20,"dma2");
138 }
139
140 void __init
chrp_setup_arch(void)141 chrp_setup_arch(void)
142 {
143 struct device_node *root;
144 unsigned int *opprop;
145
146 /* openpic global configuration register (64-bit format). */
147 /* openpic Interrupt Source Unit pointer (64-bit format). */
148 /* python0 facility area (mmio) (64-bit format) REAL address. */
149
150 /* init to some ~sane value until calibrate_delay() runs */
151 loops_per_jiffy = 50000000;
152
153 #ifdef CONFIG_BLK_DEV_INITRD
154 /* this is fine for chrp */
155 initrd_below_start_ok = 1;
156
157 if (initrd_start)
158 ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
159 else
160 #endif
161 ROOT_DEV = to_kdev_t(0x0803); /* sda3 (sda1 is for the kernel or the bootloader) */
162
163 machine_check_init();
164
165 #ifndef CONFIG_PPC_ISERIES
166 /* Find and initialize PCI host bridges */
167 /* iSeries needs to be done much later. */
168 eeh_init();
169 find_and_init_phbs();
170 #endif
171
172 /* Find the Open PIC if present */
173 root = find_path_device("/");
174 opprop = (unsigned int *) get_property(root,
175 "platform-open-pic", NULL);
176 if (opprop != 0) {
177 int n = prom_n_addr_cells(root);
178 unsigned long openpic;
179
180 for (openpic = 0; n > 0; --n)
181 openpic = (openpic << 32) + *opprop++;
182 printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic);
183 OpenPIC_Addr = __ioremap(openpic, 0x40000, _PAGE_NO_CACHE);
184 }
185
186 #ifdef CONFIG_DUMMY_CONSOLE
187 conswitchp = &dummy_con;
188 #endif
189 }
190
191 void __init
chrp_init2(void)192 chrp_init2(void)
193 {
194 /*
195 * It is sensitive, when this is called (not too earlu)
196 * -- tibit
197 */
198 chrp_request_regions();
199 /* Manually leave the kernel version on the panel. */
200 ppc_md.progress("Linux ppc64\n", 0);
201 ppc_md.progress(UTS_RELEASE, 0);
202 }
203
204 /* Initialize firmware assisted non-maskable interrupts if
205 * the firmware supports this feature. If it does not,
206 * look for the check-exception property.
207 */
machine_check_init(void)208 static void __init machine_check_init(void)
209 {
210 long ret;
211 int check_ex_token;
212 int ibm_nmi_register = rtas_token("ibm,nmi-register");
213
214 if (ibm_nmi_register != RTAS_UNKNOWN_SERVICE) {
215 ret = rtas_call(ibm_nmi_register, 2, 1, NULL,
216 __pa((unsigned long)SystemReset_FWNMI),
217 __pa((unsigned long)MachineCheck_FWNMI));
218 if (ret == 0)
219 fwnmi_active = 1;
220 } else {
221 check_ex_token = rtas_token("check-exception");
222 if (check_ex_token != RTAS_UNKNOWN_SERVICE)
223 check_exception_flag = 1;
224 }
225 }
226
227
228 /* Early initialization. Relocation is on but do not reference unbolted pages */
pSeries_init_early(void)229 void __init pSeries_init_early(void)
230 {
231 #ifdef CONFIG_PPC_PSERIES /* This ifdef should go away */
232 void *comport;
233
234 hpte_init_pSeries();
235 tce_init_pSeries();
236 pSeries_pcibios_init_early();
237
238 #ifdef CONFIG_SMP
239 smp_init_pSeries();
240 #endif
241
242 /* Map the uart for udbg. */
243 comport = (void *)__ioremap(naca->serialPortAddr, 16, _PAGE_NO_CACHE);
244 udbg_init_uart(comport);
245
246 ppc_md.udbg_putc = udbg_putc;
247 ppc_md.udbg_getc = udbg_getc;
248 ppc_md.udbg_getc_poll = udbg_getc_poll;
249 #endif
250 }
251
252 void __init
chrp_init(unsigned long r3,unsigned long r4,unsigned long r5,unsigned long r6,unsigned long r7)253 chrp_init(unsigned long r3, unsigned long r4, unsigned long r5,
254 unsigned long r6, unsigned long r7)
255 {
256 #if 0 /* PPPBBB remove this later... -Peter */
257 #ifdef CONFIG_BLK_DEV_INITRD
258 /* take care of initrd if we have one */
259 if ( r6 )
260 {
261 initrd_start = __va(r6);
262 initrd_end = __va(r6 + r7);
263 }
264 #endif /* CONFIG_BLK_DEV_INITRD */
265 #endif
266
267 ppc_md.ppc_machine = systemcfg->platform;
268
269 ppc_md.setup_arch = chrp_setup_arch;
270 ppc_md.setup_residual = NULL;
271 ppc_md.get_cpuinfo = chrp_get_cpuinfo;
272 if(naca->interrupt_controller == IC_OPEN_PIC) {
273 ppc_md.init_IRQ = openpic_init_IRQ;
274 ppc_md.init_irq_desc = openpic_init_irq_desc;
275 ppc_md.get_irq = openpic_get_irq;
276 } else {
277 ppc_md.init_IRQ = xics_init_IRQ;
278 ppc_md.init_irq_desc = xics_init_irq_desc;
279 ppc_md.get_irq = xics_get_irq;
280 }
281 ppc_md.init_ras_IRQ = init_ras_IRQ;
282
283 #ifndef CONFIG_PPC_ISERIES
284 ppc_md.pcibios_fixup = pSeries_pcibios_fixup;
285 ppc_md.log_error = pSeries_log_error;
286 #else
287 ppc_md.pcibios_fixup = NULL;
288 // ppc_md.pcibios_fixup = iSeries_pcibios_fixup;
289 ppc_md.log_error = NULL;
290 #endif
291
292
293 ppc_md.init = chrp_init2;
294
295 ppc_md.restart = rtas_restart;
296 ppc_md.power_off = rtas_power_off;
297 ppc_md.halt = rtas_halt;
298
299 ppc_md.time_init = NULL;
300 ppc_md.get_boot_time = pSeries_get_boot_time;
301 ppc_md.get_rtc_time = pSeries_get_rtc_time;
302 ppc_md.set_rtc_time = pSeries_set_rtc_time;
303 ppc_md.calibrate_decr = pSeries_calibrate_decr;
304
305 ppc_md.progress = chrp_progress;
306
307 #ifdef CONFIG_VT
308 ppc_md.kbd_setkeycode = pckbd_setkeycode;
309 ppc_md.kbd_getkeycode = pckbd_getkeycode;
310 ppc_md.kbd_translate = pckbd_translate;
311 ppc_md.kbd_unexpected_up = pckbd_unexpected_up;
312 ppc_md.kbd_leds = pckbd_leds;
313 ppc_md.kbd_init_hw = pckbd_init_hw;
314 #ifdef CONFIG_MAGIC_SYSRQ
315 ppc_md.ppc_kbd_sysrq_xlate = pckbd_sysrq_xlate;
316 SYSRQ_KEY = 0x63; /* Print Screen */
317 #endif
318 #endif
319 /* Build up the firmware_features bitmask field
320 * using contents of device-tree/ibm,hypertas-functions.
321 * Ultimately this functionality may be moved into prom.c prom_init().
322 */
323 struct device_node * dn;
324 char * hypertas;
325 unsigned int len;
326 dn = find_path_device("/rtas");
327 cur_cpu_spec->firmware_features=0;
328 hypertas = get_property(dn, "ibm,hypertas-functions", &len);
329 if (hypertas) {
330 while (len > 0) {
331 int i, hypertas_len;
332 /* check value against table of strings */
333 for(i=0; i < FIRMWARE_MAX_FEATURES; i++) {
334 if ((firmware_features_table[i].name) &&
335 (strcmp(firmware_features_table[i].name,hypertas))==0) {
336 /* we have a match */
337 cur_cpu_spec->firmware_features |=
338 (firmware_features_table[i].val);
339 break;
340 }
341 }
342 hypertas_len = strlen(hypertas);
343 len -= hypertas_len +1;
344 hypertas+= hypertas_len +1;
345 }
346 }
347
348 printk(KERN_INFO "firmware_features = 0x%lx\n",
349 cur_cpu_spec->firmware_features);
350 }
351
352 void __chrp
chrp_progress(char * s,unsigned short hex)353 chrp_progress(char *s, unsigned short hex)
354 {
355 struct device_node *root;
356 int width, *p;
357 char *os;
358 static int display_character, set_indicator;
359 static int max_width;
360 static spinlock_t progress_lock = SPIN_LOCK_UNLOCKED;
361 static int pending_newline = 0; /* did last write end with unprinted newline? */
362
363 if (!rtas.base)
364 return;
365
366 if (max_width == 0) {
367 if ( (root = find_path_device("/rtas")) &&
368 (p = (unsigned int *)get_property(root,
369 "ibm,display-line-length",
370 NULL)) )
371 max_width = *p;
372 else
373 max_width = 0x10;
374 display_character = rtas_token("display-character");
375 set_indicator = rtas_token("set-indicator");
376 }
377
378 if(display_character == RTAS_UNKNOWN_SERVICE) {
379 /* use hex display if available */
380 if(set_indicator != RTAS_UNKNOWN_SERVICE)
381 rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex);
382 return;
383 }
384
385 spin_lock(&progress_lock);
386
387 /* Last write ended with newline, but we didn't print it since
388 * it would just clear the bottom line of output. Print it now
389 * instead.
390 *
391 * If no newline is pending, print a CR to start output at the
392 * beginning of the line.
393 */
394 if(pending_newline) {
395 rtas_call(display_character, 1, 1, NULL, '\r');
396 rtas_call(display_character, 1, 1, NULL, '\n');
397 pending_newline = 0;
398 } else
399 rtas_call(display_character, 1, 1, NULL, '\r');
400
401 width = max_width;
402 os = s;
403 while (*os) {
404 if(*os == '\n' || *os == '\r') {
405 /* Blank to end of line. */
406 while(width-- > 0)
407 rtas_call(display_character, 1, 1, NULL, ' ');
408
409 /* If newline is the last character, save it
410 * until next call to avoid bumping up the
411 * display output.
412 */
413 if(*os == '\n' && !os[1]) {
414 pending_newline = 1;
415 spin_unlock(&progress_lock);
416 return;
417 }
418
419 /* RTAS wants CR-LF, not just LF */
420
421 if(*os == '\n') {
422 rtas_call(display_character, 1, 1, NULL, '\r');
423 rtas_call(display_character, 1, 1, NULL, '\n');
424 } else {
425 /* CR might be used to re-draw a line, so we'll
426 * leave it alone and not add LF.
427 */
428 rtas_call(display_character, 1, 1, NULL, *os);
429 }
430
431 width = max_width;
432 } else {
433 width--;
434 rtas_call(display_character, 1, 1, NULL, *os);
435 }
436
437 os++;
438
439 /* if we overwrite the screen length */
440 if ( width <= 0 )
441 while ( (*os != 0) && (*os != '\n') && (*os != '\r') )
442 os++;
443 }
444
445 /* Blank to end of line. */
446 while ( width-- > 0 )
447 rtas_call(display_character, 1, 1, NULL, ' ' );
448
449 spin_unlock(&progress_lock);
450 }
451
452 extern void setup_default_decr(void);
453
pSeries_calibrate_decr(void)454 void __init pSeries_calibrate_decr(void)
455 {
456 struct device_node *cpu;
457 struct div_result divres;
458 int *fp;
459 unsigned long freq, processor_freq;
460
461 /*
462 * The cpu node should have a timebase-frequency property
463 * to tell us the rate at which the decrementer counts.
464 */
465 freq = 16666000; /* hardcoded default */
466 cpu = find_type_devices("cpu");
467 if (cpu != 0) {
468 fp = (int *) get_property(cpu, "timebase-frequency", NULL);
469 if (fp != 0)
470 freq = *fp;
471 }
472 ppc_tb_freq = freq;
473 processor_freq = freq;
474 if (cpu != 0) {
475 fp = (int *) get_property(cpu, "clock-frequency", NULL);
476 if (fp != 0)
477 processor_freq = *fp;
478 }
479 ppc_proc_freq = processor_freq;
480
481 printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
482 freq/1000000, freq%1000000 );
483 printk("time_init: processor frequency = %lu.%.6lu MHz\n",
484 processor_freq/1000000, processor_freq%1000000 );
485
486 tb_ticks_per_jiffy = freq / HZ;
487 tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
488 tb_ticks_per_usec = freq / 1000000;
489 div128_by_32( 1024*1024, 0, tb_ticks_per_sec, &divres );
490 tb_to_xs = divres.result_low;
491
492 setup_default_decr();
493 }
494
495