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linux/arch/sparc/kernel/pcic.c

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/*
* pcic.c: MicroSPARC-IIep 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.
*
* Support for diverse IIep based platforms by Pete Zaitcev.
* CP-1200 by Eric Brower.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <asm/swift.h> /* for cache flushing. */
#include <asm/io.h>
#include <linux/ctype.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/interrupt.h>
#include <linux/export.h>
#include <asm/irq.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/pcic.h>
#include <asm/timex.h>
#include <asm/timer.h>
#include <asm/uaccess.h>
#include <asm/irq_regs.h>
#include "kernel.h"
#include "irq.h"
/*
* I studied different documents and many live PROMs both from 2.30
* family and 3.xx versions. I came to the amazing conclusion: there is
* absolutely no way to route interrupts in IIep systems relying on
* information which PROM presents. We must hardcode interrupt routing
* schematics. And this actually sucks. -- zaitcev 1999/05/12
*
* To find irq for a device we determine which routing map
* is in effect or, in other words, on which machine we are running.
* We use PROM name for this although other techniques may be used
* in special cases (Gleb reports a PROMless IIep based system).
* Once we know the map we take device configuration address and
* find PCIC pin number where INT line goes. Then we may either program
* preferred irq into the PCIC or supply the preexisting irq to the device.
*/
struct pcic_ca2irq {
unsigned char busno; /* PCI bus number */
unsigned char devfn; /* Configuration address */
unsigned char pin; /* PCIC external interrupt pin */
unsigned char irq; /* Preferred IRQ (mappable in PCIC) */
unsigned int force; /* Enforce preferred IRQ */
};
struct pcic_sn2list {
char *sysname;
struct pcic_ca2irq *intmap;
int mapdim;
};
/*
* JavaEngine-1 apparently has different versions.
*
* According to communications with Sun folks, for P2 build 501-4628-03:
* pin 0 - parallel, audio;
* pin 1 - Ethernet;
* pin 2 - su;
* pin 3 - PS/2 kbd and mouse.
*
* OEM manual (805-1486):
* pin 0: Ethernet
* pin 1: All EBus
* pin 2: IGA (unused)
* pin 3: Not connected
* OEM manual says that 501-4628 & 501-4811 are the same thing,
* only the latter has NAND flash in place.
*
* So far unofficial Sun wins over the OEM manual. Poor OEMs...
*/
static struct pcic_ca2irq pcic_i_je1a[] = { /* 501-4811-03 */
{ 0, 0x00, 2, 12, 0 }, /* EBus: hogs all */
{ 0, 0x01, 1, 6, 1 }, /* Happy Meal */
{ 0, 0x80, 0, 7, 0 }, /* IGA (unused) */
};
/* XXX JS-E entry is incomplete - PCI Slot 2 address (pin 7)? */
static struct pcic_ca2irq pcic_i_jse[] = {
{ 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
{ 0, 0x01, 1, 6, 0 }, /* hme */
{ 0, 0x08, 2, 9, 0 }, /* VGA - we hope not used :) */
{ 0, 0x10, 6, 8, 0 }, /* PCI INTA# in Slot 1 */
{ 0, 0x18, 7, 12, 0 }, /* PCI INTA# in Slot 2, shared w. RTC */
{ 0, 0x38, 4, 9, 0 }, /* All ISA devices. Read 8259. */
{ 0, 0x80, 5, 11, 0 }, /* EIDE */
/* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */
{ 0, 0xA0, 4, 9, 0 }, /* USB */
/*
* Some pins belong to non-PCI devices, we hardcode them in drivers.
* sun4m timers - irq 10, 14
* PC style RTC - pin 7, irq 4 ?
* Smart card, Parallel - pin 4 shared with USB, ISA
* audio - pin 3, irq 5 ?
*/
};
/* SPARCengine-6 was the original release name of CP1200.
* The documentation differs between the two versions
*/
static struct pcic_ca2irq pcic_i_se6[] = {
{ 0, 0x08, 0, 2, 0 }, /* SCSI */
{ 0, 0x01, 1, 6, 0 }, /* HME */
{ 0, 0x00, 3, 13, 0 }, /* EBus */
};
/*
* Krups (courtesy of Varol Kaptan)
* No documentation available, but it was easy to guess
* because it was very similar to Espresso.
*
* pin 0 - kbd, mouse, serial;
* pin 1 - Ethernet;
* pin 2 - igs (we do not use it);
* pin 3 - audio;
* pin 4,5,6 - unused;
* pin 7 - RTC (from P2 onwards as David B. says).
*/
static struct pcic_ca2irq pcic_i_jk[] = {
{ 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
{ 0, 0x01, 1, 6, 0 }, /* hme */
};
/*
* Several entries in this list may point to the same routing map
* as several PROMs may be installed on the same physical board.
*/
#define SN2L_INIT(name, map) \
{ name, map, ARRAY_SIZE(map) }
static struct pcic_sn2list pcic_known_sysnames[] = {
SN2L_INIT("SUNW,JavaEngine1", pcic_i_je1a), /* JE1, PROM 2.32 */
SN2L_INIT("SUNW,JS-E", pcic_i_jse), /* PROLL JavaStation-E */
SN2L_INIT("SUNW,SPARCengine-6", pcic_i_se6), /* SPARCengine-6/CP-1200 */
SN2L_INIT("SUNW,JS-NC", pcic_i_jk), /* PROLL JavaStation-NC */
SN2L_INIT("SUNW,JSIIep", pcic_i_jk), /* OBP JavaStation-NC */
{ NULL, NULL, 0 }
};
/*
* Only one PCIC per IIep,
* and since we have no SMP IIep, only one per system.
*/
static int pcic0_up;
static struct linux_pcic pcic0;
void __iomem *pcic_regs;
static volatile int pcic_speculative;
static volatile int pcic_trapped;
/* forward */
unsigned int pcic_build_device_irq(struct platform_device *op,
unsigned int real_irq);
#define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3))
static int pcic_read_config_dword(unsigned int busno, unsigned int devfn,
int where, u32 *value)
{
struct linux_pcic *pcic;
unsigned long flags;
pcic = &pcic0;
local_irq_save(flags);
#if 0 /* does not fail here */
pcic_speculative = 1;
pcic_trapped = 0;
#endif
writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);
#if 0 /* does not fail here */
nop();
if (pcic_trapped) {
local_irq_restore(flags);
*value = ~0;
return 0;
}
#endif
pcic_speculative = 2;
pcic_trapped = 0;
*value = readl(pcic->pcic_config_space_data + (where&4));
nop();
if (pcic_trapped) {
pcic_speculative = 0;
local_irq_restore(flags);
*value = ~0;
return 0;
}
pcic_speculative = 0;
local_irq_restore(flags);
return 0;
}
static int pcic_read_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
unsigned int v;
if (bus->number != 0) return -EINVAL;
switch (size) {
case 1:
pcic_read_config_dword(bus->number, devfn, where&~3, &v);
*val = 0xff & (v >> (8*(where & 3)));
return 0;
case 2:
if (where&1) return -EINVAL;
pcic_read_config_dword(bus->number, devfn, where&~3, &v);
*val = 0xffff & (v >> (8*(where & 3)));
return 0;
case 4:
if (where&3) return -EINVAL;
pcic_read_config_dword(bus->number, devfn, where&~3, val);
return 0;
}
return -EINVAL;
}
static int pcic_write_config_dword(unsigned int busno, unsigned int devfn,
int where, u32 value)
{
struct linux_pcic *pcic;
unsigned long flags;
pcic = &pcic0;
local_irq_save(flags);
writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);
writel(value, pcic->pcic_config_space_data + (where&4));
local_irq_restore(flags);
return 0;
}
static int pcic_write_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
unsigned int v;
if (bus->number != 0) return -EINVAL;
switch (size) {
case 1:
pcic_read_config_dword(bus->number, devfn, where&~3, &v);
v = (v & ~(0xff << (8*(where&3)))) |
((0xff&val) << (8*(where&3)));
return pcic_write_config_dword(bus->number, devfn, where&~3, v);
case 2:
if (where&1) return -EINVAL;
pcic_read_config_dword(bus->number, devfn, where&~3, &v);
v = (v & ~(0xffff << (8*(where&3)))) |
((0xffff&val) << (8*(where&3)));
return pcic_write_config_dword(bus->number, devfn, where&~3, v);
case 4:
if (where&3) return -EINVAL;
return pcic_write_config_dword(bus->number, devfn, where, val);
}
return -EINVAL;
}
static struct pci_ops pcic_ops = {
.read = pcic_read_config,
.write = pcic_write_config,
};
/*
* On sparc64 pcibios_init() calls pci_controller_probe().
* We want PCIC probed little ahead so that interrupt controller
* would be operational.
*/
int __init pcic_probe(void)
{
struct linux_pcic *pcic;
struct linux_prom_registers regs[PROMREG_MAX];
struct linux_pbm_info* pbm;
char namebuf[64];
phandle node;
int err;
if (pcic0_up) {
prom_printf("PCIC: called twice!\n");
prom_halt();
}
pcic = &pcic0;
node = prom_getchild (prom_root_node);
node = prom_searchsiblings (node, "pci");
if (node == 0)
return -ENODEV;
/*
* 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();
}
pcic0_up = 1;
pcic->pcic_res_regs.name = "pcic_registers";
pcic->pcic_regs = ioremap(regs[0].phys_addr, regs[0].reg_size);
if (!pcic->pcic_regs) {
prom_printf("PCIC: Error, cannot map PCIC registers.\n");
prom_halt();
}
pcic->pcic_res_io.name = "pcic_io";
if ((pcic->pcic_io = (unsigned long)
ioremap(regs[1].phys_addr, 0x10000)) == 0) {
prom_printf("PCIC: Error, cannot map PCIC IO Base.\n");
prom_halt();
}
pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr";
if ((pcic->pcic_config_space_addr =
ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == NULL) {
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_res_cfg_data.name = "pcic_cfg_data";
if ((pcic->pcic_config_space_data =
ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == NULL) {
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, 63); namebuf[63] = 0;
strcpy(pbm->prom_name, namebuf);
{
extern int pcic_nmi_trap_patch[4];
t_nmi[0] = pcic_nmi_trap_patch[0];
t_nmi[1] = pcic_nmi_trap_patch[1];
t_nmi[2] = pcic_nmi_trap_patch[2];
t_nmi[3] = pcic_nmi_trap_patch[3];
swift_flush_dcache();
pcic_regs = pcic->pcic_regs;
}
prom_getstring(prom_root_node, "name", namebuf, 63); namebuf[63] = 0;
{
struct pcic_sn2list *p;
for (p = pcic_known_sysnames; p->sysname != NULL; p++) {
if (strcmp(namebuf, p->sysname) == 0)
break;
}
pcic->pcic_imap = p->intmap;
pcic->pcic_imdim = p->mapdim;
}
if (pcic->pcic_imap == NULL) {
/*
* We do not panic here for the sake of embedded systems.
*/
printk("PCIC: System %s is unknown, cannot route interrupts\n",
namebuf);
}
return 0;
}
static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic)
{
struct linux_pbm_info *pbm = &pcic->pbm;
pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);
if (!pbm->pci_bus)
return;
#if 0 /* deadwood transplanted from sparc64 */
pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);
pci_record_assignments(pbm, pbm->pci_bus);
pci_assign_unassigned(pbm, pbm->pci_bus);
pci_fixup_irq(pbm, pbm->pci_bus);
#endif
pci_bus_add_devices(pbm->pci_bus);
}
/*
* Main entry point from the PCI subsystem.
*/
static int __init pcic_init(void)
{
struct linux_pcic *pcic;
/*
* PCIC should be initialized at start of the timer.
* So, here we report the presence of PCIC and do some magic passes.
*/
if(!pcic0_up)
return 0;
pcic = &pcic0;
/*
* Switch off IOTLB translation.
*/
writeb(PCI_DVMA_CONTROL_IOTLB_DISABLE,
pcic->pcic_regs+PCI_DVMA_CONTROL);
/*
* 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? XXX
*/
writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0);
writel(0+PCI_BASE_ADDRESS_SPACE_MEMORY,
pcic->pcic_regs+PCI_BASE_ADDRESS_0);
pcic_pbm_scan_bus(pcic);
return 0;
}
int pcic_present(void)
{
return pcic0_up;
}
static int pdev_to_pnode(struct linux_pbm_info *pbm, struct pci_dev *pdev)
{
struct linux_prom_pci_registers regs[PROMREG_MAX];
int err;
phandle 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;
}
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 linux_pcic *pcic,
struct pci_dev *dev, int node)
{
char namebuf[64];
unsigned long address;
unsigned long flags;
int j;
if (node == 0 || node == -1) {
strcpy(namebuf, "???");
} else {
prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0;
}
for (j = 0; j < 6; j++) {
address = dev->resource[j].start;
if (address == 0) break; /* are sequential */
flags = dev->resource[j].flags;
if ((flags & IORESOURCE_IO) != 0) {
if (address < 0x10000) {
/*
* A device responds to I/O cycles on PCI.
* We generate these cycles with memory
* access into the fixed map (phys 0x30000000).
*
* Since a device driver does not want to
* do ioremap() before accessing PC-style I/O,
* we supply virtual, ready to access address.
*
* Note that request_region()
* works for these devices.
*
* XXX Neat trick, but it's a *bad* idea
* to shit into regions like that.
* What if we want to allocate one more
* PCI base address...
*/
dev->resource[j].start =
pcic->pcic_io + address;
dev->resource[j].end = 1; /* XXX */
dev->resource[j].flags =
(flags & ~IORESOURCE_IO) | IORESOURCE_MEM;
} else {
/*
* OOPS... PCI Spec allows this. Sun does
* not have any devices getting above 64K
* so it must be user with a weird I/O
* board in a PCI slot. We must remap it
* under 64K but it is not done yet. XXX
*/
printk("PCIC: Skipping I/O space at 0x%lx, "
"this will Oops if a driver attaches "
"device '%s' at %02x:%02x)\n", address,
namebuf, dev->bus->number, dev->devfn);
}
}
}
}
static void
pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
{
struct pcic_ca2irq *p;
unsigned int real_irq;
int i, ivec;
char namebuf[64];
if (node == 0 || node == -1) {
strcpy(namebuf, "???");
} else {
prom_getstring(node, "name", namebuf, sizeof(namebuf));
}
if ((p = pcic->pcic_imap) == NULL) {
dev->irq = 0;
return;
}
for (i = 0; i < pcic->pcic_imdim; i++) {
if (p->busno == dev->bus->number && p->devfn == dev->devfn)
break;
p++;
}
if (i >= pcic->pcic_imdim) {
printk("PCIC: device %s devfn %02x:%02x not found in %d\n",
namebuf, dev->bus->number, dev->devfn, pcic->pcic_imdim);
dev->irq = 0;
return;
}
i = p->pin;
if (i >= 0 && i < 4) {
ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
real_irq = ivec >> (i << 2) & 0xF;
} else if (i >= 4 && i < 8) {
ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
real_irq = ivec >> ((i-4) << 2) & 0xF;
} else { /* Corrupted map */
printk("PCIC: BAD PIN %d\n", i); for (;;) {}
}
/* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %x\n", namebuf, i, ivec, dev->irq); */
/* real_irq means PROM did not bother to program the upper
* half of PCIC. This happens on JS-E with PROM 3.11, for instance.
*/
if (real_irq == 0 || p->force) {
if (p->irq == 0 || p->irq >= 15) { /* Corrupted map */
printk("PCIC: BAD IRQ %d\n", p->irq); for (;;) {}
}
printk("PCIC: setting irq %d at pin %d for device %02x:%02x\n",
p->irq, p->pin, dev->bus->number, dev->devfn);
real_irq = p->irq;
i = p->pin;
if (i >= 4) {
ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
ivec &= ~(0xF << ((i - 4) << 2));
ivec |= p->irq << ((i - 4) << 2);
writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_HI);
} else {
ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
ivec &= ~(0xF << (i << 2));
ivec |= p->irq << (i << 2);
writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO);
}
}
dev->irq = pcic_build_device_irq(NULL, real_irq);
}
/*
* Normally called from {do_}pci_scan_bus...
*/
void pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev;
int i, has_io, has_mem;
unsigned int cmd;
struct linux_pcic *pcic;
/* struct linux_pbm_info* pbm = &pcic->pbm; */
int node;
struct pcidev_cookie *pcp;
if (!pcic0_up) {
printk("pcibios_fixup_bus: no PCIC\n");
return;
}
pcic = &pcic0;
/*
* Next crud is an equivalent of pbm = pcic_bus_to_pbm(bus);
*/
if (bus->number != 0) {
printk("pcibios_fixup_bus: nonzero bus 0x%x\n", bus->number);
return;
}
list_for_each_entry(dev, &bus->devices, bus_list) {
/*
* 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 f = dev->resource[i].flags;
if (f & IORESOURCE_IO) {
has_io = 1;
} else if (f & IORESOURCE_MEM)
has_mem = 1;
}
pcic_read_config(dev->bus, dev->devfn, PCI_COMMAND, 2, &cmd);
if (has_io && !(cmd & PCI_COMMAND_IO)) {
printk("PCIC: Enabling I/O for device %02x:%02x\n",
dev->bus->number, dev->devfn);
cmd |= PCI_COMMAND_IO;
pcic_write_config(dev->bus, dev->devfn,
PCI_COMMAND, 2, cmd);
}
if (has_mem && !(cmd & PCI_COMMAND_MEMORY)) {
printk("PCIC: Enabling memory for device %02x:%02x\n",
dev->bus->number, dev->devfn);
cmd |= PCI_COMMAND_MEMORY;
pcic_write_config(dev->bus, dev->devfn,
PCI_COMMAND, 2, cmd);
}
node = pdev_to_pnode(&pcic->pbm, dev);
if(node == 0)
node = -1;
/* cookies */
pcp = pci_devcookie_alloc();
pcp->pbm = &pcic->pbm;
pcp->prom_node = of_find_node_by_phandle(node);
dev->sysdata = pcp;
/* fixing I/O to look like memory */
if ((dev->class>>16) != PCI_BASE_CLASS_BRIDGE)
pcic_map_pci_device(pcic, dev, node);
pcic_fill_irq(pcic, dev, node);
}
}
/* Makes compiler happy */
static volatile int pcic_timer_dummy;
static void pcic_clear_clock_irq(void)
{
pcic_timer_dummy = readl(pcic0.pcic_regs+PCI_SYS_LIMIT);
}
/* CPU frequency is 100 MHz, timer increments every 4 CPU clocks */
#define USECS_PER_JIFFY (1000000 / HZ)
#define TICK_TIMER_LIMIT ((100 * 1000000 / 4) / HZ)
static unsigned int pcic_cycles_offset(void)
{
u32 value, count;
value = readl(pcic0.pcic_regs + PCI_SYS_COUNTER);
count = value & ~PCI_SYS_COUNTER_OVERFLOW;
if (value & PCI_SYS_COUNTER_OVERFLOW)
count += TICK_TIMER_LIMIT;
/*
* We divide all by HZ
* to have microsecond resolution and to avoid overflow
*/
count = ((count / HZ) * USECS_PER_JIFFY) / (TICK_TIMER_LIMIT / HZ);
/* Coordinate with the sparc_config.clock_rate setting */
return count * 2;
}
void __init pci_time_init(void)
{
struct linux_pcic *pcic = &pcic0;
unsigned long v;
int timer_irq, irq;
int err;
#ifndef CONFIG_SMP
/*
* The clock_rate is in SBUS dimension.
* We take into account this in pcic_cycles_offset()
*/
sparc_config.clock_rate = SBUS_CLOCK_RATE / HZ;
sparc_config.features |= FEAT_L10_CLOCKEVENT;
#endif
sparc_config.features |= FEAT_L10_CLOCKSOURCE;
sparc_config.get_cycles_offset = pcic_cycles_offset;
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 = pcic_build_device_irq(NULL, timer_irq);
err = request_irq(irq, timer_interrupt,
IRQF_TIMER, "timer", NULL);
if (err) {
prom_printf("time_init: unable to attach IRQ%d\n", timer_irq);
prom_halt();
}
local_irq_enable();
}
#if 0
static void watchdog_reset() {
writeb(0, pcic->pcic_regs+PCI_SYS_STATUS);
}
#endif
resource_size_t pcibios_align_resource(void *data, const struct resource *res,
resource_size_t size, resource_size_t align)
{
return res->start;
}
int pcibios_enable_device(struct pci_dev *pdev, int mask)
{
return 0;
}
/*
* NMI
*/
void pcic_nmi(unsigned int pend, struct pt_regs *regs)
{
pend = swab32(pend);
if (!pcic_speculative || (pend & PCI_SYS_INT_PENDING_PIO) == 0) {
/*
* XXX On CP-1200 PCI #SERR may happen, we do not know
* what to do about it yet.
*/
printk("Aiee, NMI pend 0x%x pc 0x%x spec %d, hanging\n",
pend, (int)regs->pc, pcic_speculative);
for (;;) { }
}
pcic_speculative = 0;
pcic_trapped = 1;
regs->pc = regs->npc;
regs->npc += 4;
}
static inline unsigned long get_irqmask(int irq_nr)
{
return 1 << irq_nr;
}
static void pcic_mask_irq(struct irq_data *data)
{
unsigned long mask, flags;
mask = (unsigned long)data->chip_data;
local_irq_save(flags);
writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
local_irq_restore(flags);
}
static void pcic_unmask_irq(struct irq_data *data)
{
unsigned long mask, flags;
mask = (unsigned long)data->chip_data;
local_irq_save(flags);
writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
local_irq_restore(flags);
}
static unsigned int pcic_startup_irq(struct irq_data *data)
{
irq_link(data->irq);
pcic_unmask_irq(data);
return 0;
}
static struct irq_chip pcic_irq = {
.name = "pcic",
.irq_startup = pcic_startup_irq,
.irq_mask = pcic_mask_irq,
.irq_unmask = pcic_unmask_irq,
};
unsigned int pcic_build_device_irq(struct platform_device *op,
unsigned int real_irq)
{
unsigned int irq;
unsigned long mask;
irq = 0;
mask = get_irqmask(real_irq);
if (mask == 0)
goto out;
irq = irq_alloc(real_irq, real_irq);
if (irq == 0)
goto out;
irq_set_chip_and_handler_name(irq, &pcic_irq,
handle_level_irq, "PCIC");
irq_set_chip_data(irq, (void *)mask);
out:
return irq;
}
static void pcic_load_profile_irq(int cpu, unsigned int limit)
{
printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
}
void __init sun4m_pci_init_IRQ(void)
{
sparc_config.build_device_irq = pcic_build_device_irq;
sparc_config.clear_clock_irq = pcic_clear_clock_irq;
sparc_config.load_profile_irq = pcic_load_profile_irq;
}
subsys_initcall(pcic_init);
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