patch-2.1.124 linux/arch/sparc/kernel/pcic.c

• Lines: 763
• Date: Sun Oct 4 10:22:42 1998
• Orig file: v2.1.123/linux/arch/sparc/kernel/pcic.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.123/linux/arch/sparc/kernel/pcic.c linux/arch/sparc/kernel/pcic.c
@@ -0,0 +1,762 @@
+/* $Id: pcic.c,v 1.2 1998/09/29 03:21:56 jj Exp $
+ * pcic.c: Sparc/PCI controller support
+ *
+ * Copyright (C) 1998 V. Roganov and G. Raiko
+ *
+ * Code is derived from Ultra/PCI PSYCHO controller support, see that
+ * for author info.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/malloc.h>
+
+#include <asm/ebus.h>
+#include <asm/sbus.h> /* for sanity check... */
+
+#include <asm/io.h>
+
+#undef PROM_DEBUG
+#undef FIXUP_REGS_DEBUG
+#undef FIXUP_IRQ_DEBUG
+#undef FIXUP_VMA_DEBUG
+
+#ifdef PROM_DEBUG
+#define dprintf	prom_printf
+#else
+#define dprintf printk
+#endif
+
+#include <linux/ctype.h>
+#include <linux/pci.h>
+#include <linux/timex.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/oplib.h>
+#include <asm/pcic.h>
+#include <asm/timer.h>
+#include <asm/uaccess.h>
+
+#ifndef CONFIG_PCI
+
+int pcibios_present(void)
+{
+	return 0;
+}
+
+asmlinkage int sys_pciconfig_read(unsigned long bus,
+				  unsigned long dfn,
+				  unsigned long off,
+				  unsigned long len,
+				  unsigned char *buf)
+{
+	return 0;
+}
+
+asmlinkage int sys_pciconfig_write(unsigned long bus,
+				   unsigned long dfn,
+				   unsigned long off,
+				   unsigned long len,
+				   unsigned char *buf)
+{
+	return 0;
+}
+
+#else
+
+static struct linux_pcic PCIC;
+static struct linux_pcic *pcic = NULL;
+
+static void pci_do_gettimeofday(struct timeval *tv);
+static void pci_do_settimeofday(struct timeval *tv);
+
+__initfunc(void pcic_probe(void))
+{
+	struct linux_prom_registers regs[PROMREG_MAX];
+	struct linux_pbm_info* pbm;
+	char namebuf[64];
+	int node;
+	int err;
+
+	if (pci_present()) {
+		prom_printf("PCIC: called twice!\n");
+		prom_halt();
+	}
+
+	node = prom_getchild (prom_root_node);
+	node = prom_searchsiblings (node, "pci");
+	if (node == 0)
+		return;
+	/*
+	 * Map in PCIC register set, config space, and IO base
+	 */
+	err = prom_getproperty(node, "reg", (char*)regs, sizeof(regs));
+	if (err == 0 || err == -1) {
+		prom_printf("PCIC: Error, cannot get PCIC registers "
+			    "from PROM.\n");
+		prom_halt();
+	}
+	
+	pcic = &PCIC;
+
+	pcic->pcic_regs = (unsigned long)sparc_alloc_io(regs[0].phys_addr, NULL,
+					      regs[0].reg_size,
+					      "PCIC Registers", 0, 0);
+	if (!pcic->pcic_regs) {
+		prom_printf("PCIC: Error, cannot map PCIC registers.\n");
+		prom_halt();
+	}
+
+	pcic->pcic_io_phys = regs[1].phys_addr;
+	pcic->pcic_io = (unsigned long)sparc_alloc_io(regs[1].phys_addr, NULL,
+					    regs[1].reg_size,
+					    "PCIC IO Base", 0, 0);
+	if (pcic->pcic_io == 0UL) {
+		prom_printf("PCIC: Error, cannot map PCIC IO Base.\n");
+		prom_halt();
+	}
+
+	pcic->pcic_config_space_addr =
+			(unsigned long)sparc_alloc_io (regs[2].phys_addr, NULL,
+					     regs[2].reg_size * 2,
+					     "PCI Config Space Address", 0, 0);
+	if (pcic->pcic_config_space_addr == 0UL) {
+		prom_printf("PCIC: Error, cannot map" 
+			    "PCI Configuration Space Address.\n");
+		prom_halt();
+	}
+
+	/*
+	 * Docs say three least significant bits in address and data
+	 * must be the same. Thus, we need adjust size of data.
+	 */
+	pcic->pcic_config_space_data =
+			(unsigned long)sparc_alloc_io (regs[3].phys_addr, NULL,
+					     regs[3].reg_size * 2,
+					     "PCI Config Space Data", 0, 0);
+	if (pcic->pcic_config_space_data == 0UL) {
+		prom_printf("PCIC: Error, cannot map" 
+			    "PCI Configuration Space Data.\n");
+		prom_halt();
+	}
+
+	pbm = &pcic->pbm;
+	pbm->prom_node = node;
+	prom_getstring(node, "name", namebuf, sizeof(namebuf));
+	strcpy(pbm->prom_name, namebuf);
+}
+
+__initfunc(void pcibios_init(void))
+{
+	/*
+	 * PCIC should be initialized at start of the timer.
+	 * So, here we report the presence of PCIC and do some magic passes.
+	 */
+	if(!pcic)
+		return;
+
+	printk("PCIC MAP: config addr=0x%lx; config data=0x%lx, "
+	       "regs=0x%lx io=0x%lx\n",
+	       pcic->pcic_config_space_addr, pcic->pcic_config_space_data,
+	       pcic->pcic_regs, pcic->pcic_io);
+
+	/*
+	 * FIXME:
+	 *      Switch off IOTLB translation.
+	 *      It'll be great to use IOMMU to handle HME's rings
+	 *      but we couldn't. Thus, we have to flush CPU cache
+	 *      in HME.
+	 */
+	writeb(PCI_DVMA_CONTROL_IOTLB_DISABLE, 
+	       pcic->pcic_regs+PCI_DVMA_CONTROL);
+
+	/*
+	 * FIXME:
+	 *      Increase mapped size for PCI memory space (DMA access).
+	 *      Should be done in that order (size first, address second).
+	 *      Why we couldn't set up 4GB and forget about it ?
+	 */
+	writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0);
+	writel(0+PCI_BASE_ADDRESS_SPACE_MEMORY, 
+	       pcic->pcic_regs+PCI_BASE_ADDRESS_0);
+}
+
+int pcibios_present(void)
+{
+	return pcic != NULL;
+}
+
+__initfunc(static int pdev_to_pnode(struct linux_pbm_info *pbm, 
+				    struct pci_dev *pdev))
+{
+	struct linux_prom_pci_registers regs[PROMREG_MAX];
+	int err;
+	int node = prom_getchild(pbm->prom_node);
+
+	while(node) {
+		err = prom_getproperty(node, "reg", 
+				       (char *)&regs[0], sizeof(regs));
+		if(err != 0 && err != -1) {
+			unsigned long devfn = (regs[0].which_io >> 8) & 0xff;
+			if(devfn == pdev->devfn)
+				return node; /* Match */
+		}
+		node = prom_getsibling(node);
+	}
+	return 0;
+}
+
+static inline struct pcidev_cookie *pci_devcookie_alloc(void)
+{
+	return kmalloc(sizeof(struct pcidev_cookie), GFP_ATOMIC);
+}
+
+
+static void pcic_map_pci_device (struct pci_dev *dev) {
+	int node, pcinode;
+	int i, j;
+
+	/* Is any valid address present ? */
+	i = 0;
+	for(j = 0; j < 6; j++)
+		if (dev->base_address[j]) i++;
+	if (!i) return; /* nothing to do */
+
+	/*
+	 * find related address and get it's window length
+	 */
+	pcinode = prom_getchild(prom_root_node);
+	pcinode = prom_searchsiblings(pcinode, "pci");
+	if (!pcinode)
+		panic("PCIC: failed to locate 'pci' node");
+
+
+	for (node = prom_getchild(pcinode); node;
+	     node = prom_getsibling(node)) {
+		struct linux_prom_pci_assigned_addresses addrs[6];
+		int addrlen = prom_getproperty(node,"assigned-addresses",
+					       (char*)addrs, sizeof(addrs));
+		if (addrlen == -1)
+			continue;
+
+		addrlen /= sizeof(struct linux_prom_pci_assigned_addresses);
+		for (i = 0; i < addrlen; i++ )
+		    for (j = 0; j < 6; j++) {
+			if (!dev->base_address[j] || !addrs[i].phys_lo)
+				continue;
+			if (addrs[i].phys_lo == dev->base_address[j]) {
+			    unsigned long address = dev->base_address[j];
+			    int length  = addrs[i].size_lo;
+			    char namebuf[128] = { 0, };
+			    unsigned long mapaddr, addrflags;
+	    
+			    prom_getstring(node, "name",
+					   namebuf,  sizeof(namebuf));
+
+			    /* FIXME:
+			     *      failure in allocation too large space
+			     */
+			    if (length > 0x200000) {
+				length = 0x200000;
+				prom_printf("PCIC: map window for device '%s' "
+					    "reduced to 2MB !\n", namebuf);
+			    }
+
+			    /*
+			     *  Be careful with MEM/IO address flags
+			     */
+			    if ((address & PCI_BASE_ADDRESS_SPACE) ==
+				 PCI_BASE_ADDRESS_SPACE_IO) {
+				mapaddr = address & PCI_BASE_ADDRESS_IO_MASK;
+			    } else {
+				mapaddr = address & PCI_BASE_ADDRESS_MEM_MASK;
+			    }
+			    addrflags = address ^ mapaddr;
+
+			    dev->base_address[j] =
+				(unsigned long)sparc_alloc_io(address, 0, 
+							      length,
+							      namebuf, 0, 0);
+			    if ( dev->base_address[j] == 0 )
+				panic("PCIC: failed make mapping for "
+				      "pci device '%s' with address %lx\n",
+				       namebuf, address);
+
+			    dev->base_address[j] ^= addrflags;
+			    return;
+			}
+		}
+	}
+
+	panic("PCIC: unable to locate prom node for pci device (%x,%x) \n",
+	      dev->device, dev->vendor);
+}
+
+/*
+ * Assign IO space for a device.
+ * This is a chance for devices which have the same IO and Mem Space to
+ * fork access to IO and Mem.
+ *
+ * Now, we assume there is one such device only (IGA 1682) but code below
+ * should work in cases when space of all such devices is less then 16MB.
+ */
+unsigned long pcic_alloc_io( unsigned long* addr )
+{
+	unsigned long paddr = *addr;
+	unsigned long offset;
+
+	if(pcic->pcic_mapped_io == 0) {
+		pcic->pcic_mapped_io = paddr & ~(PCI_SPACE_SIZE-1) ;
+		writeb((pcic->pcic_mapped_io>>24) & 0xff, 
+		       pcic->pcic_regs+PCI_PIBAR);
+		writeb((pcic->pcic_io_phys>>24) & PCI_SIBAR_ADDRESS_MASK,
+		       pcic->pcic_regs+PCI_SIBAR);
+		writeb(PCI_ISIZE_16M, pcic->pcic_regs+PCI_ISIZE);
+	}
+	if(paddr < pcic->pcic_mapped_io ||
+	   paddr > pcic->pcic_mapped_io + PCI_SPACE_SIZE)
+		return 0;
+	offset = paddr - pcic->pcic_mapped_io;
+	*addr = pcic->pcic_io_phys + offset;
+	return pcic->pcic_io + offset;
+}
+
+/*
+ * Stolen from both i386 and sparc64 branch 
+ */
+__initfunc(void pcibios_fixup(void))
+{
+  struct pci_dev *dev;
+  int i, has_io, has_mem;
+  unsigned short cmd;
+
+	if(pcic == NULL) {
+		prom_printf("PCI: Error, PCIC not found.\n");
+		prom_halt();
+	}
+
+	for (dev = pci_devices; dev; dev=dev->next) {
+		/*
+		 * Comment from i386 branch:
+		 *     There are buggy BIOSes that forget to enable I/O and memory
+		 *     access to PCI devices. We try to fix this, but we need to
+		 *     be sure that the BIOS didn't forget to assign an address
+		 *     to the device. [mj]
+		 * OBP is a case of such BIOS :-)
+		 */
+		has_io = has_mem = 0;
+		for(i=0; i<6; i++) {
+			unsigned long a = dev->base_address[i];
+			if (a & PCI_BASE_ADDRESS_SPACE_IO) {
+				has_io = 1;
+			} else if (a & PCI_BASE_ADDRESS_MEM_MASK)
+				has_mem = 1;
+		}
+		pci_read_config_word(dev, PCI_COMMAND, &cmd);
+		if (has_io && !(cmd & PCI_COMMAND_IO)) {
+			printk("PCI: Enabling I/O for device %02x:%02x\n",
+				dev->bus->number, dev->devfn);
+			cmd |= PCI_COMMAND_IO;
+			pci_write_config_word(dev, PCI_COMMAND, cmd);
+		}
+		if (has_mem && !(cmd & PCI_COMMAND_MEMORY)) {
+			printk("PCI: Enabling memory for device %02x:%02x\n",
+				dev->bus->number, dev->devfn);
+			cmd |= PCI_COMMAND_MEMORY;
+			pci_write_config_word(dev, PCI_COMMAND, cmd);
+		}    
+
+		/* cookies */
+		{
+			struct pcidev_cookie *pcp;
+			struct linux_pbm_info* pbm = &pcic->pbm;
+			int node = pdev_to_pnode(pbm, dev);
+
+			if(node == 0)
+				node = -1;
+			pcp = pci_devcookie_alloc();
+			pcp->pbm = pbm;
+			pcp->prom_node = node;
+			dev->sysdata = pcp;
+		}
+
+		/* memory mapping */
+		if (!(dev->vendor == PCI_VENDOR_ID_SUN &&
+		      dev->device == PCI_DEVICE_ID_SUN_EBUS)) {
+			pcic_map_pci_device(dev);
+		}
+
+		/* irq */
+#define SETIRQ(vend,devid,irqn) \
+	if (dev->vendor==vend && dev->device==devid) dev->irq = irqn;
+
+		SETIRQ(PCI_VENDOR_ID_SUN,PCI_DEVICE_ID_SUN_HAPPYMEAL,3);
+	}
+	ebus_init();
+}
+
+/* Makes compiler happy */
+static volatile int pcic_timer_dummy;
+
+static void pcic_clear_clock_irq(void)
+{
+	pcic_timer_dummy = readl(pcic->pcic_regs+PCI_SYS_LIMIT);
+}
+
+static void pcic_timer_handler (int irq, void *h, struct pt_regs *regs)
+{
+	pcic_clear_clock_irq();
+	do_timer(regs);
+}
+
+#define USECS_PER_JIFFY  10000  /* We have 100HZ "standard" timer for sparc */
+#define TICK_TIMER_LIMIT ((100*1000000/4)/100)
+
+__initfunc(void pci_time_init(void))
+{
+	unsigned long v;
+	int timer_irq, irq;
+
+	do_get_fast_time = pci_do_gettimeofday;
+	/* A hack until do_gettimeofday prototype is moved to arch specific headers
+	   and btfixupped. Patch do_gettimeofday with ba pci_do_gettimeofday; nop */
+	((unsigned int *)do_gettimeofday)[0] = 
+		0x10800000 | (((unsigned long)pci_do_gettimeofday - (unsigned long)do_gettimeofday) & 0x003fffff);
+	((unsigned int *)do_gettimeofday)[1] =
+		0x01000000;
+	BTFIXUPSET_CALL(bus_do_settimeofday, pci_do_settimeofday, BTFIXUPCALL_NORM);
+	btfixup();
+
+	writel (TICK_TIMER_LIMIT, pcic->pcic_regs+PCI_SYS_LIMIT);
+	/* PROM should set appropriate irq */
+	v = readb(pcic->pcic_regs+PCI_COUNTER_IRQ);
+	timer_irq = PCI_COUNTER_IRQ_SYS(v);
+	writel (PCI_COUNTER_IRQ_SET(timer_irq, 0),
+		pcic->pcic_regs+PCI_COUNTER_IRQ);
+	irq = request_irq(timer_irq, pcic_timer_handler,
+			  (SA_INTERRUPT | SA_STATIC_ALLOC), "timer", NULL);
+	if (irq) {
+		prom_printf("time_init: unable to attach IRQ%d\n", timer_irq);
+		prom_halt();
+	}
+	__sti();
+}
+
+static __inline__ unsigned long do_gettimeoffset(void)
+{
+	unsigned long offset = 0;
+
+	/* 
+	 * We devide all to 100
+	 * to have microsecond resolution and to avoid overflow
+	 */
+	unsigned long count = 
+	    readl(pcic->pcic_regs+PCI_SYS_COUNTER) & ~PCI_SYS_COUNTER_OVERFLOW;
+	count = ((count/100)*USECS_PER_JIFFY) / (TICK_TIMER_LIMIT/100);
+
+	if(test_bit(TIMER_BH, &bh_active))
+		offset = 1000000;
+	return offset + count;
+}
+
+extern volatile unsigned long lost_ticks;
+
+static void pci_do_gettimeofday(struct timeval *tv)
+{
+ 	unsigned long flags;
+
+	save_and_cli(flags);
+	*tv = xtime;
+	tv->tv_usec += do_gettimeoffset();
+
+	/*
+	 * xtime is atomically updated in timer_bh. lost_ticks is
+	 * nonzero if the timer bottom half hasnt executed yet.
+	 */
+	if (lost_ticks)
+		tv->tv_usec += USECS_PER_JIFFY;
+
+	restore_flags(flags);
+
+	if (tv->tv_usec >= 1000000) {
+		tv->tv_usec -= 1000000;
+		tv->tv_sec++;
+	}       
+}
+
+static void pci_do_settimeofday(struct timeval *tv)
+{
+	cli();
+	tv->tv_usec -= do_gettimeoffset();
+	if(tv->tv_usec < 0) {
+		tv->tv_usec += 1000000;
+		tv->tv_sec--;
+	}
+	xtime = *tv;
+	time_state = TIME_BAD;
+	time_maxerror = 0x70000000;
+	time_esterror = 0x70000000;
+	sti();
+}
+
+#if 0
+static void watchdog_reset() {
+	writeb(0, pcic->pcic_regs+PCI_SYS_STATUS);
+}
+#endif
+
+#define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3))
+
+int pcibios_read_config_byte(unsigned char bus, unsigned char device_fn,
+			     unsigned char where, unsigned char *value)
+{
+	unsigned int v;
+
+	pcibios_read_config_dword (bus, device_fn, where&~3, &v);
+	*value = 0xff & (v >> (8*(where & 3)));
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int pcibios_read_config_word (unsigned char bus,
+			      unsigned char device_fn, 
+			      unsigned char where, unsigned short *value)
+{
+	unsigned int v;
+	if (where&1) return PCIBIOS_BAD_REGISTER_NUMBER;
+  
+	pcibios_read_config_dword (bus, device_fn, where&~3, &v);
+	*value = 0xffff & (v >> (8*(where & 3)));
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int pcibios_read_config_dword (unsigned char bus, unsigned char device_fn,
+			       unsigned char where, unsigned int *value)
+{
+	unsigned long flags;
+	if (where&3) return PCIBIOS_BAD_REGISTER_NUMBER;
+	if (bus != 0 || 
+	    (device_fn != 0 && device_fn != 1 && device_fn != 0x80)) {
+		*value = 0xffffffff;
+		return PCIBIOS_SUCCESSFUL;
+	}
+
+	/* FIXME: IGA haven't got high config memory addresses !!! */
+	if (device_fn == 0x80 && where > PCI_INTERRUPT_LINE) {
+		*value = 0xffffffff;
+		return PCIBIOS_SUCCESSFUL;
+	}
+
+	save_and_cli(flags);
+	writel(CONFIG_CMD(bus,device_fn,where), pcic->pcic_config_space_addr);
+	*value = readl(pcic->pcic_config_space_data + (where&4));
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}
+    
+int pcibios_write_config_byte (unsigned char bus, unsigned char devfn,
+			       unsigned char where, unsigned char value)
+{
+	unsigned int v;
+
+	pcibios_read_config_dword (bus, devfn, where&~3, &v);
+	v = (v & ~(0xff << (8*(where&3)))) | 
+	    ((0xff&(unsigned)value) << (8*(where&3)));
+	return pcibios_write_config_dword (bus, devfn, where&~3, v);
+}
+
+int pcibios_write_config_word (unsigned char bus, unsigned char devfn,
+			       unsigned char where, unsigned short value)
+{
+	unsigned int v;
+	if (where&1) return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	pcibios_read_config_dword (bus, devfn, where&~3, &v);
+	v = (v & ~(0xffff << (8*(where&3)))) | 
+	    ((0xffff&(unsigned)value) << (8*(where&3)));
+	return pcibios_write_config_dword (bus, devfn, where&~3, v);
+}
+  
+int pcibios_write_config_dword (unsigned char bus, unsigned char devfn,
+				unsigned char where, unsigned int value)
+{
+	unsigned long flags;
+	if ((where&3) || bus != 0 || (devfn != 0 && devfn != 1 && devfn != 0x80))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	save_and_cli(flags);
+	writel(CONFIG_CMD(bus,devfn,where),pcic->pcic_config_space_addr);
+	writel(value, pcic->pcic_config_space_data + (where&4));
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+__initfunc(char *pcibios_setup(char *str))
+{
+	return str;
+}
+
+/*
+ *  Following code added to handle extra PCI-related system calls 
+ */
+asmlinkage int sys_pciconfig_read(unsigned long bus,
+				  unsigned long dfn,
+				  unsigned long off,
+				  unsigned long len,
+				  unsigned char *buf)
+{
+	unsigned char ubyte;
+	unsigned short ushort;
+	unsigned int uint;
+	int err = 0;
+
+	if(!suser())
+		return -EPERM;
+
+	lock_kernel();
+	switch(len) {
+	case 1:
+		pcibios_read_config_byte(bus, dfn, off, &ubyte);
+		put_user(ubyte, (unsigned char *)buf);
+		break;
+	case 2:
+		pcibios_read_config_word(bus, dfn, off, &ushort);
+		put_user(ushort, (unsigned short *)buf);
+		break;
+	case 4:
+		pcibios_read_config_dword(bus, dfn, off, &uint);
+		put_user(uint, (unsigned int *)buf);
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+	};
+	unlock_kernel();
+
+	return err;
+}
+   
+asmlinkage int sys_pciconfig_write(unsigned long bus,
+				   unsigned long dfn,
+				   unsigned long off,
+				   unsigned long len,
+				   unsigned char *buf)
+{
+	unsigned char ubyte;
+	unsigned short ushort;
+	unsigned int uint;
+	int err = 0;
+
+	if(!suser())
+		return -EPERM;
+
+	lock_kernel();
+	switch(len) {
+	case 1:
+		err = get_user(ubyte, (unsigned char *)buf);
+		if(err)
+			break;
+		pcibios_write_config_byte(bus, dfn, off, ubyte);
+		break;
+
+	case 2:
+		err = get_user(ushort, (unsigned short *)buf);
+		if(err)
+			break;
+		pcibios_write_config_byte(bus, dfn, off, ushort);
+		break;
+
+	case 4:
+		err = get_user(uint, (unsigned int *)buf);
+		if(err)
+			break;
+		pcibios_write_config_byte(bus, dfn, off, uint);
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+
+	};
+	unlock_kernel();
+
+	return err;
+}			   
+
+static inline unsigned long get_irqmask(int irq_nr)
+{
+	return 1 << irq_nr;
+}
+
+static inline char *pcic_irq_itoa(unsigned int irq)
+{
+	static char buff[16];
+	sprintf(buff, "%d", irq);
+	return buff;
+}
+
+static void pcic_disable_irq(unsigned int irq_nr)
+{
+	unsigned long mask, flags;
+
+	mask = get_irqmask(irq_nr);
+	save_and_cli(flags);
+	writel(mask, pcic->pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
+	restore_flags(flags);
+}
+
+static void pcic_enable_irq(unsigned int irq_nr)
+{
+	unsigned long mask, flags;
+
+	mask = get_irqmask(irq_nr);
+	save_and_cli(flags);
+	writel(mask, pcic->pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
+	restore_flags(flags);
+}
+
+static void pcic_clear_profile_irq(int cpu)
+{
+	printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
+}
+
+static void pcic_load_profile_irq(int cpu, unsigned int limit)
+{
+	printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
+}
+
+/* We assume the caller is local cli()'d when these are called, or else
+ * very bizarre behavior will result.
+ */
+static void pcic_disable_pil_irq(unsigned int pil)
+{
+	writel(get_irqmask(pil), pcic->pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
+}
+
+static void pcic_enable_pil_irq(unsigned int pil)
+{
+	writel(get_irqmask(pil), pcic->pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
+}
+
+__initfunc(void sun4m_pci_init_IRQ(void))
+{
+	BTFIXUPSET_CALL(enable_irq, pcic_enable_irq, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(disable_irq, pcic_disable_irq, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(enable_pil_irq, pcic_enable_pil_irq, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(disable_pil_irq, pcic_disable_pil_irq, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(clear_clock_irq, pcic_clear_clock_irq, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(clear_profile_irq, pcic_clear_profile_irq, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(load_profile_irq, pcic_load_profile_irq, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(__irq_itoa, pcic_irq_itoa, BTFIXUPCALL_NORM);
+}
+
+__initfunc(void pcibios_fixup_bus(struct pci_bus *bus))
+{
+}
+
+#endif