2 * pcic.c: MicroSPARC-IIep PCI controller support
4 * Copyright (C) 1998 V. Roganov and G. Raiko
6 * Code is derived from Ultra/PCI PSYCHO controller support, see that
9 * Support for diverse IIep based platforms by Pete Zaitcev.
10 * CP-1200 by Eric Brower.
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/jiffies.h>
21 #include <asm/sbus.h> /* for sanity check... */
22 #include <asm/swift.h> /* for cache flushing. */
25 #include <linux/ctype.h>
26 #include <linux/pci.h>
27 #include <linux/time.h>
28 #include <linux/timex.h>
29 #include <linux/interrupt.h>
32 #include <asm/oplib.h>
35 #include <asm/timer.h>
36 #include <asm/uaccess.h>
37 #include <asm/irq_regs.h>
40 unsigned int pcic_pin_to_irq(unsigned int pin, char *name);
43 * I studied different documents and many live PROMs both from 2.30
44 * family and 3.xx versions. I came to the amazing conclusion: there is
45 * absolutely no way to route interrupts in IIep systems relying on
46 * information which PROM presents. We must hardcode interrupt routing
47 * schematics. And this actually sucks. -- zaitcev 1999/05/12
49 * To find irq for a device we determine which routing map
50 * is in effect or, in other words, on which machine we are running.
51 * We use PROM name for this although other techniques may be used
52 * in special cases (Gleb reports a PROMless IIep based system).
53 * Once we know the map we take device configuration address and
54 * find PCIC pin number where INT line goes. Then we may either program
55 * preferred irq into the PCIC or supply the preexisting irq to the device.
58 unsigned char busno; /* PCI bus number */
59 unsigned char devfn; /* Configuration address */
60 unsigned char pin; /* PCIC external interrupt pin */
61 unsigned char irq; /* Preferred IRQ (mappable in PCIC) */
62 unsigned int force; /* Enforce preferred IRQ */
67 struct pcic_ca2irq *intmap;
72 * JavaEngine-1 apparently has different versions.
74 * According to communications with Sun folks, for P2 build 501-4628-03:
75 * pin 0 - parallel, audio;
78 * pin 3 - PS/2 kbd and mouse.
80 * OEM manual (805-1486):
84 * pin 3: Not connected
85 * OEM manual says that 501-4628 & 501-4811 are the same thing,
86 * only the latter has NAND flash in place.
88 * So far unofficial Sun wins over the OEM manual. Poor OEMs...
90 static struct pcic_ca2irq pcic_i_je1a[] = { /* 501-4811-03 */
91 { 0, 0x00, 2, 12, 0 }, /* EBus: hogs all */
92 { 0, 0x01, 1, 6, 1 }, /* Happy Meal */
93 { 0, 0x80, 0, 7, 0 }, /* IGA (unused) */
96 /* XXX JS-E entry is incomplete - PCI Slot 2 address (pin 7)? */
97 static struct pcic_ca2irq pcic_i_jse[] = {
98 { 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
99 { 0, 0x01, 1, 6, 0 }, /* hme */
100 { 0, 0x08, 2, 9, 0 }, /* VGA - we hope not used :) */
101 { 0, 0x10, 6, 8, 0 }, /* PCI INTA# in Slot 1 */
102 { 0, 0x18, 7, 12, 0 }, /* PCI INTA# in Slot 2, shared w. RTC */
103 { 0, 0x38, 4, 9, 0 }, /* All ISA devices. Read 8259. */
104 { 0, 0x80, 5, 11, 0 }, /* EIDE */
105 /* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */
106 { 0, 0xA0, 4, 9, 0 }, /* USB */
108 * Some pins belong to non-PCI devices, we hardcode them in drivers.
109 * sun4m timers - irq 10, 14
110 * PC style RTC - pin 7, irq 4 ?
111 * Smart card, Parallel - pin 4 shared with USB, ISA
112 * audio - pin 3, irq 5 ?
116 /* SPARCengine-6 was the original release name of CP1200.
117 * The documentation differs between the two versions
119 static struct pcic_ca2irq pcic_i_se6[] = {
120 { 0, 0x08, 0, 2, 0 }, /* SCSI */
121 { 0, 0x01, 1, 6, 0 }, /* HME */
122 { 0, 0x00, 3, 13, 0 }, /* EBus */
126 * Krups (courtesy of Varol Kaptan)
127 * No documentation available, but it was easy to guess
128 * because it was very similar to Espresso.
130 * pin 0 - kbd, mouse, serial;
132 * pin 2 - igs (we do not use it);
134 * pin 4,5,6 - unused;
135 * pin 7 - RTC (from P2 onwards as David B. says).
137 static struct pcic_ca2irq pcic_i_jk[] = {
138 { 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
139 { 0, 0x01, 1, 6, 0 }, /* hme */
143 * Several entries in this list may point to the same routing map
144 * as several PROMs may be installed on the same physical board.
146 #define SN2L_INIT(name, map) \
147 { name, map, ARRAY_SIZE(map) }
149 static struct pcic_sn2list pcic_known_sysnames[] = {
150 SN2L_INIT("SUNW,JavaEngine1", pcic_i_je1a), /* JE1, PROM 2.32 */
151 SN2L_INIT("SUNW,JS-E", pcic_i_jse), /* PROLL JavaStation-E */
152 SN2L_INIT("SUNW,SPARCengine-6", pcic_i_se6), /* SPARCengine-6/CP-1200 */
153 SN2L_INIT("SUNW,JS-NC", pcic_i_jk), /* PROLL JavaStation-NC */
154 SN2L_INIT("SUNW,JSIIep", pcic_i_jk), /* OBP JavaStation-NC */
159 * Only one PCIC per IIep,
160 * and since we have no SMP IIep, only one per system.
163 static struct linux_pcic pcic0;
165 void __iomem *pcic_regs;
166 volatile int pcic_speculative;
167 volatile int pcic_trapped;
169 static void pci_do_gettimeofday(struct timeval *tv);
170 static int pci_do_settimeofday(struct timespec *tv);
172 #define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3))
174 static int pcic_read_config_dword(unsigned int busno, unsigned int devfn,
175 int where, u32 *value)
177 struct linux_pcic *pcic;
182 local_irq_save(flags);
183 #if 0 /* does not fail here */
184 pcic_speculative = 1;
187 writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);
188 #if 0 /* does not fail here */
191 local_irq_restore(flags);
196 pcic_speculative = 2;
198 *value = readl(pcic->pcic_config_space_data + (where&4));
201 pcic_speculative = 0;
202 local_irq_restore(flags);
206 pcic_speculative = 0;
207 local_irq_restore(flags);
211 static int pcic_read_config(struct pci_bus *bus, unsigned int devfn,
212 int where, int size, u32 *val)
216 if (bus->number != 0) return -EINVAL;
219 pcic_read_config_dword(bus->number, devfn, where&~3, &v);
220 *val = 0xff & (v >> (8*(where & 3)));
223 if (where&1) return -EINVAL;
224 pcic_read_config_dword(bus->number, devfn, where&~3, &v);
225 *val = 0xffff & (v >> (8*(where & 3)));
228 if (where&3) return -EINVAL;
229 pcic_read_config_dword(bus->number, devfn, where&~3, val);
235 static int pcic_write_config_dword(unsigned int busno, unsigned int devfn,
236 int where, u32 value)
238 struct linux_pcic *pcic;
243 local_irq_save(flags);
244 writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);
245 writel(value, pcic->pcic_config_space_data + (where&4));
246 local_irq_restore(flags);
250 static int pcic_write_config(struct pci_bus *bus, unsigned int devfn,
251 int where, int size, u32 val)
255 if (bus->number != 0) return -EINVAL;
258 pcic_read_config_dword(bus->number, devfn, where&~3, &v);
259 v = (v & ~(0xff << (8*(where&3)))) |
260 ((0xff&val) << (8*(where&3)));
261 return pcic_write_config_dword(bus->number, devfn, where&~3, v);
263 if (where&1) return -EINVAL;
264 pcic_read_config_dword(bus->number, devfn, where&~3, &v);
265 v = (v & ~(0xffff << (8*(where&3)))) |
266 ((0xffff&val) << (8*(where&3)));
267 return pcic_write_config_dword(bus->number, devfn, where&~3, v);
269 if (where&3) return -EINVAL;
270 return pcic_write_config_dword(bus->number, devfn, where, val);
275 static struct pci_ops pcic_ops = {
276 .read = pcic_read_config,
277 .write = pcic_write_config,
281 * On sparc64 pcibios_init() calls pci_controller_probe().
282 * We want PCIC probed little ahead so that interrupt controller
283 * would be operational.
285 int __init pcic_probe(void)
287 struct linux_pcic *pcic;
288 struct linux_prom_registers regs[PROMREG_MAX];
289 struct linux_pbm_info* pbm;
295 prom_printf("PCIC: called twice!\n");
300 node = prom_getchild (prom_root_node);
301 node = prom_searchsiblings (node, "pci");
305 * Map in PCIC register set, config space, and IO base
307 err = prom_getproperty(node, "reg", (char*)regs, sizeof(regs));
308 if (err == 0 || err == -1) {
309 prom_printf("PCIC: Error, cannot get PCIC registers "
316 pcic->pcic_res_regs.name = "pcic_registers";
317 pcic->pcic_regs = ioremap(regs[0].phys_addr, regs[0].reg_size);
318 if (!pcic->pcic_regs) {
319 prom_printf("PCIC: Error, cannot map PCIC registers.\n");
323 pcic->pcic_res_io.name = "pcic_io";
324 if ((pcic->pcic_io = (unsigned long)
325 ioremap(regs[1].phys_addr, 0x10000)) == 0) {
326 prom_printf("PCIC: Error, cannot map PCIC IO Base.\n");
330 pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr";
331 if ((pcic->pcic_config_space_addr =
332 ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == 0) {
333 prom_printf("PCIC: Error, cannot map"
334 "PCI Configuration Space Address.\n");
339 * Docs say three least significant bits in address and data
340 * must be the same. Thus, we need adjust size of data.
342 pcic->pcic_res_cfg_data.name = "pcic_cfg_data";
343 if ((pcic->pcic_config_space_data =
344 ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == 0) {
345 prom_printf("PCIC: Error, cannot map"
346 "PCI Configuration Space Data.\n");
351 pbm->prom_node = node;
352 prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0;
353 strcpy(pbm->prom_name, namebuf);
356 extern volatile int t_nmi[1];
357 extern int pcic_nmi_trap_patch[1];
359 t_nmi[0] = pcic_nmi_trap_patch[0];
360 t_nmi[1] = pcic_nmi_trap_patch[1];
361 t_nmi[2] = pcic_nmi_trap_patch[2];
362 t_nmi[3] = pcic_nmi_trap_patch[3];
363 swift_flush_dcache();
364 pcic_regs = pcic->pcic_regs;
367 prom_getstring(prom_root_node, "name", namebuf, 63); namebuf[63] = 0;
369 struct pcic_sn2list *p;
371 for (p = pcic_known_sysnames; p->sysname != NULL; p++) {
372 if (strcmp(namebuf, p->sysname) == 0)
375 pcic->pcic_imap = p->intmap;
376 pcic->pcic_imdim = p->mapdim;
378 if (pcic->pcic_imap == NULL) {
380 * We do not panic here for the sake of embedded systems.
382 printk("PCIC: System %s is unknown, cannot route interrupts\n",
389 static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic)
391 struct linux_pbm_info *pbm = &pcic->pbm;
393 pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);
394 #if 0 /* deadwood transplanted from sparc64 */
395 pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);
396 pci_record_assignments(pbm, pbm->pci_bus);
397 pci_assign_unassigned(pbm, pbm->pci_bus);
398 pci_fixup_irq(pbm, pbm->pci_bus);
403 * Main entry point from the PCI subsystem.
405 static int __init pcic_init(void)
407 struct linux_pcic *pcic;
410 * PCIC should be initialized at start of the timer.
411 * So, here we report the presence of PCIC and do some magic passes.
418 * Switch off IOTLB translation.
420 writeb(PCI_DVMA_CONTROL_IOTLB_DISABLE,
421 pcic->pcic_regs+PCI_DVMA_CONTROL);
424 * Increase mapped size for PCI memory space (DMA access).
425 * Should be done in that order (size first, address second).
426 * Why we couldn't set up 4GB and forget about it? XXX
428 writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0);
429 writel(0+PCI_BASE_ADDRESS_SPACE_MEMORY,
430 pcic->pcic_regs+PCI_BASE_ADDRESS_0);
432 pcic_pbm_scan_bus(pcic);
438 int pcic_present(void)
443 static int __init pdev_to_pnode(struct linux_pbm_info *pbm,
444 struct pci_dev *pdev)
446 struct linux_prom_pci_registers regs[PROMREG_MAX];
448 int node = prom_getchild(pbm->prom_node);
451 err = prom_getproperty(node, "reg",
452 (char *)®s[0], sizeof(regs));
453 if(err != 0 && err != -1) {
454 unsigned long devfn = (regs[0].which_io >> 8) & 0xff;
455 if(devfn == pdev->devfn)
458 node = prom_getsibling(node);
463 static inline struct pcidev_cookie *pci_devcookie_alloc(void)
465 return kmalloc(sizeof(struct pcidev_cookie), GFP_ATOMIC);
468 static void pcic_map_pci_device(struct linux_pcic *pcic,
469 struct pci_dev *dev, int node)
472 unsigned long address;
476 if (node == 0 || node == -1) {
477 strcpy(namebuf, "???");
479 prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0;
482 for (j = 0; j < 6; j++) {
483 address = dev->resource[j].start;
484 if (address == 0) break; /* are sequential */
485 flags = dev->resource[j].flags;
486 if ((flags & IORESOURCE_IO) != 0) {
487 if (address < 0x10000) {
489 * A device responds to I/O cycles on PCI.
490 * We generate these cycles with memory
491 * access into the fixed map (phys 0x30000000).
493 * Since a device driver does not want to
494 * do ioremap() before accessing PC-style I/O,
495 * we supply virtual, ready to access address.
497 * Ebus devices do not come here even if
498 * CheerIO makes a similar conversion.
499 * See ebus.c for details.
501 * Note that request_region()
502 * works for these devices.
504 * XXX Neat trick, but it's a *bad* idea
505 * to shit into regions like that.
506 * What if we want to allocate one more
507 * PCI base address...
509 dev->resource[j].start =
510 pcic->pcic_io + address;
511 dev->resource[j].end = 1; /* XXX */
512 dev->resource[j].flags =
513 (flags & ~IORESOURCE_IO) | IORESOURCE_MEM;
516 * OOPS... PCI Spec allows this. Sun does
517 * not have any devices getting above 64K
518 * so it must be user with a weird I/O
519 * board in a PCI slot. We must remap it
520 * under 64K but it is not done yet. XXX
522 printk("PCIC: Skipping I/O space at 0x%lx,"
523 "this will Oops if a driver attaches;"
524 "device '%s' at %02x:%02x)\n", address,
525 namebuf, dev->bus->number, dev->devfn);
532 pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
534 struct pcic_ca2irq *p;
538 if (node == 0 || node == -1) {
539 strcpy(namebuf, "???");
541 prom_getstring(node, "name", namebuf, sizeof(namebuf));
544 if ((p = pcic->pcic_imap) == 0) {
548 for (i = 0; i < pcic->pcic_imdim; i++) {
549 if (p->busno == dev->bus->number && p->devfn == dev->devfn)
553 if (i >= pcic->pcic_imdim) {
554 printk("PCIC: device %s devfn %02x:%02x not found in %d\n",
555 namebuf, dev->bus->number, dev->devfn, pcic->pcic_imdim);
561 if (i >= 0 && i < 4) {
562 ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
563 dev->irq = ivec >> (i << 2) & 0xF;
564 } else if (i >= 4 && i < 8) {
565 ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
566 dev->irq = ivec >> ((i-4) << 2) & 0xF;
567 } else { /* Corrupted map */
568 printk("PCIC: BAD PIN %d\n", i); for (;;) {}
570 /* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %x\n", namebuf, i, ivec, dev->irq); */
573 * dev->irq=0 means PROM did not bother to program the upper
574 * half of PCIC. This happens on JS-E with PROM 3.11, for instance.
576 if (dev->irq == 0 || p->force) {
577 if (p->irq == 0 || p->irq >= 15) { /* Corrupted map */
578 printk("PCIC: BAD IRQ %d\n", p->irq); for (;;) {}
580 printk("PCIC: setting irq %d at pin %d for device %02x:%02x\n",
581 p->irq, p->pin, dev->bus->number, dev->devfn);
586 ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
587 ivec &= ~(0xF << ((i - 4) << 2));
588 ivec |= p->irq << ((i - 4) << 2);
589 writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_HI);
591 ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
592 ivec &= ~(0xF << (i << 2));
593 ivec |= p->irq << (i << 2);
594 writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO);
602 * Normally called from {do_}pci_scan_bus...
604 void __devinit pcibios_fixup_bus(struct pci_bus *bus)
607 int i, has_io, has_mem;
609 struct linux_pcic *pcic;
610 /* struct linux_pbm_info* pbm = &pcic->pbm; */
612 struct pcidev_cookie *pcp;
615 printk("pcibios_fixup_bus: no PCIC\n");
621 * Next crud is an equivalent of pbm = pcic_bus_to_pbm(bus);
623 if (bus->number != 0) {
624 printk("pcibios_fixup_bus: nonzero bus 0x%x\n", bus->number);
628 list_for_each_entry(dev, &bus->devices, bus_list) {
631 * Comment from i386 branch:
632 * There are buggy BIOSes that forget to enable I/O and memory
633 * access to PCI devices. We try to fix this, but we need to
634 * be sure that the BIOS didn't forget to assign an address
635 * to the device. [mj]
636 * OBP is a case of such BIOS :-)
638 has_io = has_mem = 0;
640 unsigned long f = dev->resource[i].flags;
641 if (f & IORESOURCE_IO) {
643 } else if (f & IORESOURCE_MEM)
646 pcic_read_config(dev->bus, dev->devfn, PCI_COMMAND, 2, &cmd);
647 if (has_io && !(cmd & PCI_COMMAND_IO)) {
648 printk("PCIC: Enabling I/O for device %02x:%02x\n",
649 dev->bus->number, dev->devfn);
650 cmd |= PCI_COMMAND_IO;
651 pcic_write_config(dev->bus, dev->devfn,
652 PCI_COMMAND, 2, cmd);
654 if (has_mem && !(cmd & PCI_COMMAND_MEMORY)) {
655 printk("PCIC: Enabling memory for device %02x:%02x\n",
656 dev->bus->number, dev->devfn);
657 cmd |= PCI_COMMAND_MEMORY;
658 pcic_write_config(dev->bus, dev->devfn,
659 PCI_COMMAND, 2, cmd);
662 node = pdev_to_pnode(&pcic->pbm, dev);
667 pcp = pci_devcookie_alloc();
668 pcp->pbm = &pcic->pbm;
669 pcp->prom_node = of_find_node_by_phandle(node);
672 /* fixing I/O to look like memory */
673 if ((dev->class>>16) != PCI_BASE_CLASS_BRIDGE)
674 pcic_map_pci_device(pcic, dev, node);
676 pcic_fill_irq(pcic, dev, node);
681 * pcic_pin_to_irq() is exported to ebus.c.
684 pcic_pin_to_irq(unsigned int pin, char *name)
686 struct linux_pcic *pcic = &pcic0;
691 ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
692 irq = ivec >> (pin << 2) & 0xF;
693 } else if (pin < 8) {
694 ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
695 irq = ivec >> ((pin-4) << 2) & 0xF;
696 } else { /* Corrupted map */
697 printk("PCIC: BAD PIN %d FOR %s\n", pin, name);
698 for (;;) {} /* XXX Cannot panic properly in case of PROLL */
700 /* P3 */ /* printk("PCIC: dev %s pin %d ivec 0x%x irq %x\n", name, pin, ivec, irq); */
704 /* Makes compiler happy */
705 static volatile int pcic_timer_dummy;
707 static void pcic_clear_clock_irq(void)
709 pcic_timer_dummy = readl(pcic0.pcic_regs+PCI_SYS_LIMIT);
712 static irqreturn_t pcic_timer_handler (int irq, void *h)
714 write_seqlock(&xtime_lock); /* Dummy, to show that we remember */
715 pcic_clear_clock_irq();
718 update_process_times(user_mode(get_irq_regs()));
720 write_sequnlock(&xtime_lock);
724 #define USECS_PER_JIFFY 10000 /* We have 100HZ "standard" timer for sparc */
725 #define TICK_TIMER_LIMIT ((100*1000000/4)/100)
727 void __init pci_time_init(void)
729 struct linux_pcic *pcic = &pcic0;
733 /* A hack until do_gettimeofday prototype is moved to arch specific headers
734 and btfixupped. Patch do_gettimeofday with ba pci_do_gettimeofday; nop */
735 ((unsigned int *)do_gettimeofday)[0] =
736 0x10800000 | ((((unsigned long)pci_do_gettimeofday -
737 (unsigned long)do_gettimeofday) >> 2) & 0x003fffff);
738 ((unsigned int *)do_gettimeofday)[1] = 0x01000000;
739 BTFIXUPSET_CALL(bus_do_settimeofday, pci_do_settimeofday, BTFIXUPCALL_NORM);
742 writel (TICK_TIMER_LIMIT, pcic->pcic_regs+PCI_SYS_LIMIT);
743 /* PROM should set appropriate irq */
744 v = readb(pcic->pcic_regs+PCI_COUNTER_IRQ);
745 timer_irq = PCI_COUNTER_IRQ_SYS(v);
746 writel (PCI_COUNTER_IRQ_SET(timer_irq, 0),
747 pcic->pcic_regs+PCI_COUNTER_IRQ);
748 irq = request_irq(timer_irq, pcic_timer_handler,
749 (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
751 prom_printf("time_init: unable to attach IRQ%d\n", timer_irq);
757 static __inline__ unsigned long do_gettimeoffset(void)
760 * We devide all to 100
761 * to have microsecond resolution and to avoid overflow
763 unsigned long count =
764 readl(pcic0.pcic_regs+PCI_SYS_COUNTER) & ~PCI_SYS_COUNTER_OVERFLOW;
765 count = ((count/100)*USECS_PER_JIFFY) / (TICK_TIMER_LIMIT/100);
769 static void pci_do_gettimeofday(struct timeval *tv)
773 unsigned long usec, sec;
774 unsigned long max_ntp_tick = tick_usec - tickadj;
777 seq = read_seqbegin_irqsave(&xtime_lock, flags);
778 usec = do_gettimeoffset();
781 * If time_adjust is negative then NTP is slowing the clock
782 * so make sure not to go into next possible interval.
783 * Better to lose some accuracy than have time go backwards..
785 if (unlikely(time_adjust < 0))
786 usec = min(usec, max_ntp_tick);
789 usec += (xtime.tv_nsec / 1000);
790 } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
792 while (usec >= 1000000) {
801 static int pci_do_settimeofday(struct timespec *tv)
803 if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
807 * This is revolting. We need to set "xtime" correctly. However, the
808 * value in this location is the value at the most recent update of
809 * wall time. Discover what correction gettimeofday() would have
810 * made, and then undo it!
812 tv->tv_nsec -= 1000 * do_gettimeoffset();
813 while (tv->tv_nsec < 0) {
814 tv->tv_nsec += NSEC_PER_SEC;
818 wall_to_monotonic.tv_sec += xtime.tv_sec - tv->tv_sec;
819 wall_to_monotonic.tv_nsec += xtime.tv_nsec - tv->tv_nsec;
821 if (wall_to_monotonic.tv_nsec > NSEC_PER_SEC) {
822 wall_to_monotonic.tv_nsec -= NSEC_PER_SEC;
823 wall_to_monotonic.tv_sec++;
825 if (wall_to_monotonic.tv_nsec < 0) {
826 wall_to_monotonic.tv_nsec += NSEC_PER_SEC;
827 wall_to_monotonic.tv_sec--;
830 xtime.tv_sec = tv->tv_sec;
831 xtime.tv_nsec = tv->tv_nsec;
837 static void watchdog_reset() {
838 writeb(0, pcic->pcic_regs+PCI_SYS_STATUS);
843 * Other archs parse arguments here.
845 char * __devinit pcibios_setup(char *str)
850 void pcibios_align_resource(void *data, struct resource *res,
851 resource_size_t size, resource_size_t align)
855 int pcibios_enable_device(struct pci_dev *pdev, int mask)
863 void pcic_nmi(unsigned int pend, struct pt_regs *regs)
866 pend = flip_dword(pend);
868 if (!pcic_speculative || (pend & PCI_SYS_INT_PENDING_PIO) == 0) {
870 * XXX On CP-1200 PCI #SERR may happen, we do not know
871 * what to do about it yet.
873 printk("Aiee, NMI pend 0x%x pc 0x%x spec %d, hanging\n",
874 pend, (int)regs->pc, pcic_speculative);
877 pcic_speculative = 0;
879 regs->pc = regs->npc;
883 static inline unsigned long get_irqmask(int irq_nr)
888 static void pcic_disable_irq(unsigned int irq_nr)
890 unsigned long mask, flags;
892 mask = get_irqmask(irq_nr);
893 local_irq_save(flags);
894 writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
895 local_irq_restore(flags);
898 static void pcic_enable_irq(unsigned int irq_nr)
900 unsigned long mask, flags;
902 mask = get_irqmask(irq_nr);
903 local_irq_save(flags);
904 writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
905 local_irq_restore(flags);
908 static void pcic_clear_profile_irq(int cpu)
910 printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
913 static void pcic_load_profile_irq(int cpu, unsigned int limit)
915 printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
918 /* We assume the caller has disabled local interrupts when these are called,
919 * or else very bizarre behavior will result.
921 static void pcic_disable_pil_irq(unsigned int pil)
923 writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
926 static void pcic_enable_pil_irq(unsigned int pil)
928 writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
931 void __init sun4m_pci_init_IRQ(void)
933 BTFIXUPSET_CALL(enable_irq, pcic_enable_irq, BTFIXUPCALL_NORM);
934 BTFIXUPSET_CALL(disable_irq, pcic_disable_irq, BTFIXUPCALL_NORM);
935 BTFIXUPSET_CALL(enable_pil_irq, pcic_enable_pil_irq, BTFIXUPCALL_NORM);
936 BTFIXUPSET_CALL(disable_pil_irq, pcic_disable_pil_irq, BTFIXUPCALL_NORM);
937 BTFIXUPSET_CALL(clear_clock_irq, pcic_clear_clock_irq, BTFIXUPCALL_NORM);
938 BTFIXUPSET_CALL(clear_profile_irq, pcic_clear_profile_irq, BTFIXUPCALL_NORM);
939 BTFIXUPSET_CALL(load_profile_irq, pcic_load_profile_irq, BTFIXUPCALL_NORM);
942 int pcibios_assign_resource(struct pci_dev *pdev, int resource)
947 struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
949 struct pcidev_cookie *pc = pdev->sysdata;
951 return pc->prom_node;
953 EXPORT_SYMBOL(pci_device_to_OF_node);
956 * This probably belongs here rather than ioport.c because
957 * we do not want this crud linked into SBus kernels.
958 * Also, think for a moment about likes of floppy.c that
959 * include architecture specific parts. They may want to redefine ins/outs.
961 * We do not use horroble macroses here because we want to
962 * advance pointer by sizeof(size).
964 void outsb(unsigned long addr, const void *src, unsigned long count)
968 outb(*(const char *)src, addr);
974 void outsw(unsigned long addr, const void *src, unsigned long count)
978 outw(*(const short *)src, addr);
984 void outsl(unsigned long addr, const void *src, unsigned long count)
988 outl(*(const long *)src, addr);
994 void insb(unsigned long addr, void *dst, unsigned long count)
998 *(unsigned char *)dst = inb(addr);
1004 void insw(unsigned long addr, void *dst, unsigned long count)
1008 *(unsigned short *)dst = inw(addr);
1014 void insl(unsigned long addr, void *dst, unsigned long count)
1019 * XXX I am sure we are in for an unaligned trap here.
1021 *(unsigned long *)dst = inl(addr);
1027 subsys_initcall(pcic_init);