// SPDX-License-Identifier: GPL-2.0
/*
* 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 <linux/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 , 0 x00, 2 , 12 , 0 }, /* EBus: hogs all */
{ 0 , 0 x01, 1 , 6 , 1 }, /* Happy Meal */
{ 0 , 0 x80, 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 , 0 x00, 0 , 13 , 0 }, /* Ebus - serial and keyboard */
{ 0 , 0 x01, 1 , 6 , 0 }, /* hme */
{ 0 , 0 x08, 2 , 9 , 0 }, /* VGA - we hope not used :) */
{ 0 , 0 x10, 6 , 8 , 0 }, /* PCI INTA# in Slot 1 */
{ 0 , 0 x18, 7 , 12 , 0 }, /* PCI INTA# in Slot 2, shared w. RTC */
{ 0 , 0 x38, 4 , 9 , 0 }, /* All ISA devices. Read 8259. */
{ 0 , 0 x80, 5 , 11 , 0 }, /* EIDE */
/* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */
{ 0 , 0 xA0, 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 , 0 x08, 0 , 2 , 0 }, /* SCSI */
{ 0 , 0 x01, 1 , 6 , 0 }, /* HME */
{ 0 , 0 x00, 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 , 0 x00, 0 , 13 , 0 }, /* Ebus - serial and keyboard */
{ 0 , 0 x01, 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) (0 x80000000 | (((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 = 0 xff & (v >> (8 *(where & 3 )));
return 0 ;
case 2 :
if (where&1 ) return -EINVAL;
pcic_read_config_dword(bus->number, devfn, where&~3 , &v);
*val = 0 xffff & (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 & ~(0 xff << (8 *(where&3 )))) |
((0 xff&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 & ~(0 xffff << (8 *(where&3 )))) |
((0 xffff&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, 0 x10000)) == 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 4 GB and forget about it ? XXX
*/
writel(0 xF0000000UL, 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 *)®s[0 ], sizeof (regs));
if (err != 0 && err != -1 ) {
unsigned long devfn = (regs[0 ].which_io >> 8 ) & 0 xff;
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 < 0 x10000) {
/*
* A device responds to I / O cycles on PCI .
* We generate these cycles with memory
* access into the fixed map ( phys 0 x30000000 ) .
*
* 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 64 K
* so it must be user with a weird I / O
* board in a PCI slot . We must remap it
* under 64 K but it is not done yet . XXX
*/
pci_info(dev, "PCIC: Skipping I/O space at "
"0x%lx, this will Oops if a driver "
"attaches device '%s'\n" , address,
namebuf);
}
}
}
}
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) {
pci_info(dev, "PCIC: device %s not found in %d\n" , namebuf,
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 ) & 0 xF;
} else if (i >= 4 && i < 8 ) {
ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
real_irq = ivec >> ((i-4 ) << 2 ) & 0 xF;
} else { /* Corrupted map */
pci_info(dev, "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 */
pci_info(dev, "PCIC: BAD IRQ %d\n" , p->irq); for (;;) {}
}
pci_info(dev, "PCIC: setting irq %d at pin %d\n" , p->irq,
p->pin);
real_irq = p->irq;
i = p->pin;
if (i >= 4 ) {
ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
ivec &= ~(0 xF << ((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 &= ~(0 xF << (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;
struct linux_pcic *pcic;
/* struct linux_pbm_info* pbm = &pcic->pbm; */
int node;
struct pcidev_cookie *pcp;
if (!pcic0_up) {
pci_info(bus, "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 ) {
pci_info(bus, "pcibios_fixup_bus: nonzero bus 0x%x\n" ,
bus->number);
return ;
}
list_for_each_entry(dev, &bus->devices, bus_list) {
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);
}
}
int pcibios_enable_device(struct pci_dev *dev, int mask)
{
struct resource *res;
u16 cmd, oldcmd;
int i;
pci_read_config_word(dev, PCI_COMMAND, &cmd);
oldcmd = cmd;
pci_dev_for_each_resource(dev, res, i) {
/* Only set up the requested stuff */
if (!(mask & (1 <<i)))
continue ;
if (res->flags & IORESOURCE_IO)
cmd |= PCI_COMMAND_IO;
if (res->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
if (cmd != oldcmd) {
pci_info(dev, "enabling device (%04x -> %04x)\n" , oldcmd, cmd);
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
return 0 ;
}
/* 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
/*
* 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);
Messung V0.5 in Prozent C=92 H=90 G=90
¤ Dauer der Verarbeitung: 0.18 Sekunden
(vorverarbeitet am 2026-09-28)
¤
*© Formatika GbR, Deutschland