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Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds
[deliverable/linux.git] / arch / ppc / platforms / apus_setup.c
1 /*
2 * Copyright (C) 1998, 1999 Jesper Skov
3 *
4 * Basically what is needed to replace functionality found in
5 * arch/m68k allowing Amiga drivers to work under APUS.
6 * Bits of code and/or ideas from arch/m68k and arch/ppc files.
7 *
8 * TODO:
9 * This file needs a *really* good cleanup. Restructure and optimize.
10 * Make sure it can be compiled for non-APUS configs. Begin to move
11 * Amiga specific stuff into mach/amiga.
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/sched.h>
16 #include <linux/init.h>
17 #include <linux/initrd.h>
18 #include <linux/seq_file.h>
19
20 /* Needs INITSERIAL call in head.S! */
21 #undef APUS_DEBUG
22
23 #include <asm/bootinfo.h>
24 #include <asm/setup.h>
25 #include <asm/amigahw.h>
26 #include <asm/amigaints.h>
27 #include <asm/amigappc.h>
28 #include <asm/pgtable.h>
29 #include <asm/dma.h>
30 #include <asm/machdep.h>
31 #include <asm/time.h>
32
33 unsigned long m68k_machtype;
34 char debug_device[6] = "";
35
36 extern void amiga_init_IRQ(void);
37
38 extern void apus_setup_pci_ptrs(void);
39
40 void (*mach_sched_init) (void (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
41 /* machine dependent irq functions */
42 void (*mach_init_IRQ) (void) __initdata = NULL;
43 void (*(*mach_default_handler)[]) (int, void *, struct pt_regs *) = NULL;
44 void (*mach_get_model) (char *model) = NULL;
45 int (*mach_get_hardware_list) (char *buffer) = NULL;
46 int (*mach_get_irq_list) (struct seq_file *, void *) = NULL;
47 void (*mach_process_int) (int, struct pt_regs *) = NULL;
48 /* machine dependent timer functions */
49 unsigned long (*mach_gettimeoffset) (void);
50 void (*mach_gettod) (int*, int*, int*, int*, int*, int*);
51 int (*mach_hwclk) (int, struct hwclk_time*) = NULL;
52 int (*mach_set_clock_mmss) (unsigned long) = NULL;
53 void (*mach_reset)( void );
54 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
55 #ifdef CONFIG_HEARTBEAT
56 void (*mach_heartbeat) (int) = NULL;
57 extern void apus_heartbeat (void);
58 #endif
59
60 extern unsigned long amiga_model;
61 extern unsigned decrementer_count;/* count value for 1e6/HZ microseconds */
62 extern unsigned count_period_num; /* 1 decrementer count equals */
63 extern unsigned count_period_den; /* count_period_num / count_period_den us */
64
65 int num_memory = 0;
66 struct mem_info memory[NUM_MEMINFO];/* memory description */
67 /* FIXME: Duplicate memory data to avoid conflicts with m68k shared code. */
68 int m68k_realnum_memory = 0;
69 struct mem_info m68k_memory[NUM_MEMINFO];/* memory description */
70
71 struct mem_info ramdisk;
72
73 extern void config_amiga(void);
74
75 static int __60nsram = 0;
76
77 /* for cpuinfo */
78 static int __bus_speed = 0;
79 static int __speed_test_failed = 0;
80
81 /********************************************** COMPILE PROTECTION */
82 /* Provide some stubs that links to Amiga specific functions.
83 * This allows CONFIG_APUS to be removed from generic PPC files while
84 * preventing link errors for other PPC targets.
85 */
86 unsigned long apus_get_rtc_time(void)
87 {
88 #ifdef CONFIG_APUS
89 extern unsigned long m68k_get_rtc_time(void);
90
91 return m68k_get_rtc_time ();
92 #else
93 return 0;
94 #endif
95 }
96
97 int apus_set_rtc_time(unsigned long nowtime)
98 {
99 #ifdef CONFIG_APUS
100 extern int m68k_set_rtc_time(unsigned long nowtime);
101
102 return m68k_set_rtc_time (nowtime);
103 #else
104 return 0;
105 #endif
106 }
107
108 /*********************************************************** SETUP */
109 /* From arch/m68k/kernel/setup.c. */
110 void __init apus_setup_arch(void)
111 {
112 #ifdef CONFIG_APUS
113 extern char cmd_line[];
114 int i;
115 char *p, *q;
116
117 /* Let m68k-shared code know it should do the Amiga thing. */
118 m68k_machtype = MACH_AMIGA;
119
120 /* Parse the command line for arch-specific options.
121 * For the m68k, this is currently only "debug=xxx" to enable printing
122 * certain kernel messages to some machine-specific device. */
123 for( p = cmd_line; p && *p; ) {
124 i = 0;
125 if (!strncmp( p, "debug=", 6 )) {
126 strlcpy( debug_device, p+6, sizeof(debug_device) );
127 if ((q = strchr( debug_device, ' ' ))) *q = 0;
128 i = 1;
129 } else if (!strncmp( p, "60nsram", 7 )) {
130 APUS_WRITE (APUS_REG_WAITSTATE,
131 REGWAITSTATE_SETRESET
132 |REGWAITSTATE_PPCR
133 |REGWAITSTATE_PPCW);
134 __60nsram = 1;
135 i = 1;
136 }
137
138 if (i) {
139 /* option processed, delete it */
140 if ((q = strchr( p, ' ' )))
141 strcpy( p, q+1 );
142 else
143 *p = 0;
144 } else {
145 if ((p = strchr( p, ' ' ))) ++p;
146 }
147 }
148
149 config_amiga();
150
151 #if 0 /* Enable for logging - also include logging.o in Makefile rule */
152 {
153 #define LOG_SIZE 4096
154 void* base;
155
156 /* Throw away some memory - the P5 firmare stomps on top
157 * of CHIP memory during bootup.
158 */
159 amiga_chip_alloc(0x1000);
160
161 base = amiga_chip_alloc(LOG_SIZE+sizeof(klog_data_t));
162 LOG_INIT(base, base+sizeof(klog_data_t), LOG_SIZE);
163 }
164 #endif
165 #endif
166 }
167
168 int
169 apus_show_cpuinfo(struct seq_file *m)
170 {
171 extern int __map_without_bats;
172 extern unsigned long powerup_PCI_present;
173
174 seq_printf(m, "machine\t\t: Amiga\n");
175 seq_printf(m, "bus speed\t: %d%s", __bus_speed,
176 (__speed_test_failed) ? " [failed]\n" : "\n");
177 seq_printf(m, "using BATs\t: %s\n",
178 (__map_without_bats) ? "No" : "Yes");
179 seq_printf(m, "ram speed\t: %dns\n", (__60nsram) ? 60 : 70);
180 seq_printf(m, "PCI bridge\t: %s\n",
181 (powerup_PCI_present) ? "Yes" : "No");
182 return 0;
183 }
184
185 static void get_current_tb(unsigned long long *time)
186 {
187 __asm __volatile ("1:mftbu 4 \n\t"
188 " mftb 5 \n\t"
189 " mftbu 6 \n\t"
190 " cmpw 4,6 \n\t"
191 " bne 1b \n\t"
192 " stw 4,0(%0)\n\t"
193 " stw 5,4(%0)\n\t"
194 :
195 : "r" (time)
196 : "r4", "r5", "r6");
197 }
198
199
200 void apus_calibrate_decr(void)
201 {
202 #ifdef CONFIG_APUS
203 unsigned long freq;
204
205 /* This algorithm for determining the bus speed was
206 contributed by Ralph Schmidt. */
207 unsigned long long start, stop;
208 int bus_speed;
209 int speed_test_failed = 0;
210
211 {
212 unsigned long loop = amiga_eclock / 10;
213
214 get_current_tb (&start);
215 while (loop--) {
216 unsigned char tmp;
217
218 tmp = ciaa.pra;
219 }
220 get_current_tb (&stop);
221 }
222
223 bus_speed = (((unsigned long)(stop-start))*10*4) / 1000000;
224 if (AMI_1200 == amiga_model)
225 bus_speed /= 2;
226
227 if ((bus_speed >= 47) && (bus_speed < 53)) {
228 bus_speed = 50;
229 freq = 12500000;
230 } else if ((bus_speed >= 57) && (bus_speed < 63)) {
231 bus_speed = 60;
232 freq = 15000000;
233 } else if ((bus_speed >= 63) && (bus_speed < 69)) {
234 bus_speed = 67;
235 freq = 16666667;
236 } else {
237 printk ("APUS: Unable to determine bus speed (%d). "
238 "Defaulting to 50MHz", bus_speed);
239 bus_speed = 50;
240 freq = 12500000;
241 speed_test_failed = 1;
242 }
243
244 /* Ease diagnostics... */
245 {
246 extern int __map_without_bats;
247 extern unsigned long powerup_PCI_present;
248
249 printk ("APUS: BATs=%d, BUS=%dMHz",
250 (__map_without_bats) ? 0 : 1,
251 bus_speed);
252 if (speed_test_failed)
253 printk ("[FAILED - please report]");
254
255 printk (", RAM=%dns, PCI bridge=%d\n",
256 (__60nsram) ? 60 : 70,
257 (powerup_PCI_present) ? 1 : 0);
258
259 /* print a bit more if asked politely... */
260 if (!(ciaa.pra & 0x40)){
261 extern unsigned int bat_addrs[4][3];
262 int b;
263 for (b = 0; b < 4; ++b) {
264 printk ("APUS: BAT%d ", b);
265 printk ("%08x-%08x -> %08x\n",
266 bat_addrs[b][0],
267 bat_addrs[b][1],
268 bat_addrs[b][2]);
269 }
270 }
271
272 }
273
274 printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
275 freq/1000000, freq%1000000);
276 tb_ticks_per_jiffy = freq / HZ;
277 tb_to_us = mulhwu_scale_factor(freq, 1000000);
278
279 __bus_speed = bus_speed;
280 __speed_test_failed = speed_test_failed;
281 #endif
282 }
283
284 void arch_gettod(int *year, int *mon, int *day, int *hour,
285 int *min, int *sec)
286 {
287 #ifdef CONFIG_APUS
288 if (mach_gettod)
289 mach_gettod(year, mon, day, hour, min, sec);
290 else
291 *year = *mon = *day = *hour = *min = *sec = 0;
292 #endif
293 }
294
295 /* for "kbd-reset" cmdline param */
296 __init
297 void kbd_reset_setup(char *str, int *ints)
298 {
299 }
300
301 /*********************************************************** MEMORY */
302 #define KMAP_MAX 32
303 unsigned long kmap_chunks[KMAP_MAX*3];
304 int kmap_chunk_count = 0;
305
306 /* From pgtable.h */
307 static __inline__ pte_t *my_find_pte(struct mm_struct *mm,unsigned long va)
308 {
309 pgd_t *dir = 0;
310 pmd_t *pmd = 0;
311 pte_t *pte = 0;
312
313 va &= PAGE_MASK;
314
315 dir = pgd_offset( mm, va );
316 if (dir)
317 {
318 pmd = pmd_offset(dir, va & PAGE_MASK);
319 if (pmd && pmd_present(*pmd))
320 {
321 pte = pte_offset(pmd, va);
322 }
323 }
324 return pte;
325 }
326
327
328 /* Again simulating an m68k/mm/kmap.c function. */
329 void kernel_set_cachemode( unsigned long address, unsigned long size,
330 unsigned int cmode )
331 {
332 unsigned long mask, flags;
333
334 switch (cmode)
335 {
336 case IOMAP_FULL_CACHING:
337 mask = ~(_PAGE_NO_CACHE | _PAGE_GUARDED);
338 flags = 0;
339 break;
340 case IOMAP_NOCACHE_SER:
341 mask = ~0;
342 flags = (_PAGE_NO_CACHE | _PAGE_GUARDED);
343 break;
344 default:
345 panic ("kernel_set_cachemode() doesn't support mode %d\n",
346 cmode);
347 break;
348 }
349
350 size /= PAGE_SIZE;
351 address &= PAGE_MASK;
352 while (size--)
353 {
354 pte_t *pte;
355
356 pte = my_find_pte(&init_mm, address);
357 if ( !pte )
358 {
359 printk("pte NULL in kernel_set_cachemode()\n");
360 return;
361 }
362
363 pte_val (*pte) &= mask;
364 pte_val (*pte) |= flags;
365 flush_tlb_page(find_vma(&init_mm,address),address);
366
367 address += PAGE_SIZE;
368 }
369 }
370
371 unsigned long mm_ptov (unsigned long paddr)
372 {
373 unsigned long ret;
374 if (paddr < 16*1024*1024)
375 ret = ZTWO_VADDR(paddr);
376 else {
377 int i;
378
379 for (i = 0; i < kmap_chunk_count;){
380 unsigned long phys = kmap_chunks[i++];
381 unsigned long size = kmap_chunks[i++];
382 unsigned long virt = kmap_chunks[i++];
383 if (paddr >= phys
384 && paddr < (phys + size)){
385 ret = virt + paddr - phys;
386 goto exit;
387 }
388 }
389
390 ret = (unsigned long) __va(paddr);
391 }
392 exit:
393 #ifdef DEBUGPV
394 printk ("PTOV(%lx)=%lx\n", paddr, ret);
395 #endif
396 return ret;
397 }
398
399 int mm_end_of_chunk (unsigned long addr, int len)
400 {
401 if (memory[0].addr + memory[0].size == addr + len)
402 return 1;
403 return 0;
404 }
405
406 /*********************************************************** CACHE */
407
408 #define L1_CACHE_BYTES 32
409 #define MAX_CACHE_SIZE 8192
410 void cache_push(__u32 addr, int length)
411 {
412 addr = mm_ptov(addr);
413
414 if (MAX_CACHE_SIZE < length)
415 length = MAX_CACHE_SIZE;
416
417 while(length > 0){
418 __asm ("dcbf 0,%0\n\t"
419 : : "r" (addr));
420 addr += L1_CACHE_BYTES;
421 length -= L1_CACHE_BYTES;
422 }
423 /* Also flush trailing block */
424 __asm ("dcbf 0,%0\n\t"
425 "sync \n\t"
426 : : "r" (addr));
427 }
428
429 void cache_clear(__u32 addr, int length)
430 {
431 if (MAX_CACHE_SIZE < length)
432 length = MAX_CACHE_SIZE;
433
434 addr = mm_ptov(addr);
435
436 __asm ("dcbf 0,%0\n\t"
437 "sync \n\t"
438 "icbi 0,%0 \n\t"
439 "isync \n\t"
440 : : "r" (addr));
441
442 addr += L1_CACHE_BYTES;
443 length -= L1_CACHE_BYTES;
444
445 while(length > 0){
446 __asm ("dcbf 0,%0\n\t"
447 "sync \n\t"
448 "icbi 0,%0 \n\t"
449 "isync \n\t"
450 : : "r" (addr));
451 addr += L1_CACHE_BYTES;
452 length -= L1_CACHE_BYTES;
453 }
454
455 __asm ("dcbf 0,%0\n\t"
456 "sync \n\t"
457 "icbi 0,%0 \n\t"
458 "isync \n\t"
459 : : "r" (addr));
460 }
461
462 /****************************************************** from setup.c */
463 void
464 apus_restart(char *cmd)
465 {
466 local_irq_disable();
467
468 APUS_WRITE(APUS_REG_LOCK,
469 REGLOCK_BLACKMAGICK1|REGLOCK_BLACKMAGICK2);
470 APUS_WRITE(APUS_REG_LOCK,
471 REGLOCK_BLACKMAGICK1|REGLOCK_BLACKMAGICK3);
472 APUS_WRITE(APUS_REG_LOCK,
473 REGLOCK_BLACKMAGICK2|REGLOCK_BLACKMAGICK3);
474 APUS_WRITE(APUS_REG_SHADOW, REGSHADOW_SELFRESET);
475 APUS_WRITE(APUS_REG_RESET, REGRESET_AMIGARESET);
476 for(;;);
477 }
478
479 void
480 apus_power_off(void)
481 {
482 for (;;);
483 }
484
485 void
486 apus_halt(void)
487 {
488 apus_restart(NULL);
489 }
490
491 /****************************************************** IRQ stuff */
492
493 static unsigned char last_ipl[8];
494
495 int apus_get_irq(void)
496 {
497 unsigned char ipl_emu, mask;
498 unsigned int level;
499
500 APUS_READ(APUS_IPL_EMU, ipl_emu);
501 level = (ipl_emu >> 3) & IPLEMU_IPLMASK;
502 mask = IPLEMU_SETRESET|IPLEMU_DISABLEINT|level;
503 level ^= 7;
504
505 /* Save previous IPL value */
506 if (last_ipl[level])
507 return -2;
508 last_ipl[level] = ipl_emu;
509
510 /* Set to current IPL value */
511 APUS_WRITE(APUS_IPL_EMU, mask);
512 APUS_WRITE(APUS_IPL_EMU, IPLEMU_DISABLEINT|level);
513
514
515 #ifdef __INTERRUPT_DEBUG
516 printk("<%d:%d>", level, ~ipl_emu & IPLEMU_IPLMASK);
517 #endif
518 return level + IRQ_AMIGA_AUTO;
519 }
520
521 void apus_end_irq(unsigned int irq)
522 {
523 unsigned char ipl_emu;
524 unsigned int level = irq - IRQ_AMIGA_AUTO;
525 #ifdef __INTERRUPT_DEBUG
526 printk("{%d}", ~last_ipl[level] & IPLEMU_IPLMASK);
527 #endif
528 /* Restore IPL to the previous value */
529 ipl_emu = last_ipl[level] & IPLEMU_IPLMASK;
530 APUS_WRITE(APUS_IPL_EMU, IPLEMU_SETRESET|IPLEMU_DISABLEINT|ipl_emu);
531 last_ipl[level] = 0;
532 ipl_emu ^= 7;
533 APUS_WRITE(APUS_IPL_EMU, IPLEMU_DISABLEINT|ipl_emu);
534 }
535
536 /****************************************************** debugging */
537
538 /* some serial hardware definitions */
539 #define SDR_OVRUN (1<<15)
540 #define SDR_RBF (1<<14)
541 #define SDR_TBE (1<<13)
542 #define SDR_TSRE (1<<12)
543
544 #define AC_SETCLR (1<<15)
545 #define AC_UARTBRK (1<<11)
546
547 #define SER_DTR (1<<7)
548 #define SER_RTS (1<<6)
549 #define SER_DCD (1<<5)
550 #define SER_CTS (1<<4)
551 #define SER_DSR (1<<3)
552
553 static __inline__ void ser_RTSon(void)
554 {
555 ciab.pra &= ~SER_RTS; /* active low */
556 }
557
558 int __debug_ser_out( unsigned char c )
559 {
560 amiga_custom.serdat = c | 0x100;
561 mb();
562 while (!(amiga_custom.serdatr & 0x2000))
563 barrier();
564 return 1;
565 }
566
567 unsigned char __debug_ser_in( void )
568 {
569 unsigned char c;
570
571 /* XXX: is that ok?? derived from amiga_ser.c... */
572 while( !(amiga_custom.intreqr & IF_RBF) )
573 barrier();
574 c = amiga_custom.serdatr;
575 /* clear the interrupt, so that another character can be read */
576 amiga_custom.intreq = IF_RBF;
577 return c;
578 }
579
580 int __debug_serinit( void )
581 {
582 unsigned long flags;
583
584 local_irq_save(flags);
585
586 /* turn off Rx and Tx interrupts */
587 amiga_custom.intena = IF_RBF | IF_TBE;
588
589 /* clear any pending interrupt */
590 amiga_custom.intreq = IF_RBF | IF_TBE;
591
592 local_irq_restore(flags);
593
594 /*
595 * set the appropriate directions for the modem control flags,
596 * and clear RTS and DTR
597 */
598 ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */
599 ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */
600
601 #ifdef CONFIG_KGDB
602 /* turn Rx interrupts on for GDB */
603 amiga_custom.intena = IF_SETCLR | IF_RBF;
604 ser_RTSon();
605 #endif
606
607 return 0;
608 }
609
610 void __debug_print_hex(unsigned long x)
611 {
612 int i;
613 char hexchars[] = "0123456789ABCDEF";
614
615 for (i = 0; i < 8; i++) {
616 __debug_ser_out(hexchars[(x >> 28) & 15]);
617 x <<= 4;
618 }
619 __debug_ser_out('\n');
620 __debug_ser_out('\r');
621 }
622
623 void __debug_print_string(char* s)
624 {
625 unsigned char c;
626 while((c = *s++))
627 __debug_ser_out(c);
628 __debug_ser_out('\n');
629 __debug_ser_out('\r');
630 }
631
632 static void apus_progress(char *s, unsigned short value)
633 {
634 __debug_print_string(s);
635 }
636
637 /****************************************************** init */
638
639 /* The number of spurious interrupts */
640 volatile unsigned int num_spurious;
641
642 extern struct irqaction amiga_sys_irqaction[AUTO_IRQS];
643
644
645 extern void amiga_enable_irq(unsigned int irq);
646 extern void amiga_disable_irq(unsigned int irq);
647
648 struct hw_interrupt_type amiga_sys_irqctrl = {
649 .typename = "Amiga IPL",
650 .end = apus_end_irq,
651 };
652
653 struct hw_interrupt_type amiga_irqctrl = {
654 .typename = "Amiga ",
655 .enable = amiga_enable_irq,
656 .disable = amiga_disable_irq,
657 };
658
659 #define HARDWARE_MAPPED_SIZE (512*1024)
660 unsigned long __init apus_find_end_of_memory(void)
661 {
662 int shadow = 0;
663 unsigned long total;
664
665 /* The memory size reported by ADOS excludes the 512KB
666 reserved for PPC exception registers and possibly 512KB
667 containing a shadow of the ADOS ROM. */
668 {
669 unsigned long size = memory[0].size;
670
671 /* If 2MB aligned, size was probably user
672 specified. We can't tell anything about shadowing
673 in this case so skip shadow assignment. */
674 if (0 != (size & 0x1fffff)){
675 /* Align to 512KB to ensure correct handling
676 of both memfile and system specified
677 sizes. */
678 size = ((size+0x0007ffff) & 0xfff80000);
679 /* If memory is 1MB aligned, assume
680 shadowing. */
681 shadow = !(size & 0x80000);
682 }
683
684 /* Add the chunk that ADOS does not see. by aligning
685 the size to the nearest 2MB limit upwards. */
686 memory[0].size = ((size+0x001fffff) & 0xffe00000);
687 }
688
689 ppc_memstart = memory[0].addr;
690 ppc_memoffset = PAGE_OFFSET - PPC_MEMSTART;
691 total = memory[0].size;
692
693 /* Remove the memory chunks that are controlled by special
694 Phase5 hardware. */
695
696 /* Remove the upper 512KB if it contains a shadow of
697 the ADOS ROM. FIXME: It might be possible to
698 disable this shadow HW. Check the booter
699 (ppc_boot.c) */
700 if (shadow)
701 total -= HARDWARE_MAPPED_SIZE;
702
703 /* Remove the upper 512KB where the PPC exception
704 vectors are mapped. */
705 total -= HARDWARE_MAPPED_SIZE;
706
707 /* Linux/APUS only handles one block of memory -- the one on
708 the PowerUP board. Other system memory is horrible slow in
709 comparison. The user can use other memory for swapping
710 using the z2ram device. */
711 return total;
712 }
713
714 static void __init
715 apus_map_io(void)
716 {
717 /* Map PPC exception vectors. */
718 io_block_mapping(0xfff00000, 0xfff00000, 0x00020000, _PAGE_KERNEL);
719 /* Map chip and ZorroII memory */
720 io_block_mapping(zTwoBase, 0x00000000, 0x01000000, _PAGE_IO);
721 }
722
723 __init
724 void apus_init_IRQ(void)
725 {
726 struct irqaction *action;
727 int i;
728
729 #ifdef CONFIG_PCI
730 apus_setup_pci_ptrs();
731 #endif
732
733 for ( i = 0 ; i < AMI_IRQS; i++ ) {
734 irq_desc[i].status = IRQ_LEVEL;
735 if (i < IRQ_AMIGA_AUTO) {
736 irq_desc[i].chip = &amiga_irqctrl;
737 } else {
738 irq_desc[i].chip = &amiga_sys_irqctrl;
739 action = &amiga_sys_irqaction[i-IRQ_AMIGA_AUTO];
740 if (action->name)
741 setup_irq(i, action);
742 }
743 }
744
745 amiga_init_IRQ();
746
747 }
748
749 __init
750 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
751 unsigned long r6, unsigned long r7)
752 {
753 extern int parse_bootinfo(const struct bi_record *);
754 extern char _end[];
755
756 /* Parse bootinfo. The bootinfo is located right after
757 the kernel bss */
758 parse_bootinfo((const struct bi_record *)&_end);
759 #ifdef CONFIG_BLK_DEV_INITRD
760 /* Take care of initrd if we have one. Use data from
761 bootinfo to avoid the need to initialize PPC
762 registers when kernel is booted via a PPC reset. */
763 if ( ramdisk.addr ) {
764 initrd_start = (unsigned long) __va(ramdisk.addr);
765 initrd_end = (unsigned long)
766 __va(ramdisk.size + ramdisk.addr);
767 }
768 #endif /* CONFIG_BLK_DEV_INITRD */
769
770 ISA_DMA_THRESHOLD = 0x00ffffff;
771
772 ppc_md.setup_arch = apus_setup_arch;
773 ppc_md.show_cpuinfo = apus_show_cpuinfo;
774 ppc_md.init_IRQ = apus_init_IRQ;
775 ppc_md.get_irq = apus_get_irq;
776
777 #ifdef CONFIG_HEARTBEAT
778 ppc_md.heartbeat = apus_heartbeat;
779 ppc_md.heartbeat_count = 1;
780 #endif
781 #ifdef APUS_DEBUG
782 __debug_serinit();
783 ppc_md.progress = apus_progress;
784 #endif
785 ppc_md.init = NULL;
786
787 ppc_md.restart = apus_restart;
788 ppc_md.power_off = apus_power_off;
789 ppc_md.halt = apus_halt;
790
791 ppc_md.time_init = NULL;
792 ppc_md.set_rtc_time = apus_set_rtc_time;
793 ppc_md.get_rtc_time = apus_get_rtc_time;
794 ppc_md.calibrate_decr = apus_calibrate_decr;
795
796 ppc_md.find_end_of_memory = apus_find_end_of_memory;
797 ppc_md.setup_io_mappings = apus_map_io;
798 }
Linux kernel - Deliverables
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