Commit e130bedb authored by Paul Mackerras's avatar Paul Mackerras
parents 00557b59 756e7104
......@@ -12,7 +12,7 @@ CFLAGS_btext.o += -fPIC
endif
obj-y := semaphore.o cputable.o ptrace.o syscalls.o \
signal_32.o pmc.o
irq.o signal_32.o pmc.o
obj-$(CONFIG_PPC64) += setup_64.o binfmt_elf32.o sys_ppc32.o \
signal_64.o ptrace32.o systbl.o \
paca.o ioctl32.o cpu_setup_power4.o \
......
......@@ -89,12 +89,12 @@ _GLOBAL(call_do_softirq)
mtlr r0
blr
_GLOBAL(call_handle_IRQ_event)
_GLOBAL(call___do_IRQ)
mflr r0
std r0,16(r1)
stdu r1,THREAD_SIZE-112(r6)
mr r1,r6
bl .handle_IRQ_event
stdu r1,THREAD_SIZE-112(r5)
mr r1,r5
bl .__do_IRQ
ld r1,0(r1)
ld r0,16(r1)
mtlr r0
......
......@@ -53,6 +53,8 @@
#include <asm/lmb.h>
#include <asm/xmon.h>
#include "setup.h"
#undef DEBUG
#ifdef DEBUG
......
#ifndef _POWERPC_KERNEL_SETUP_H
#define _POWERPC_KERNEL_SETUP_H
void check_for_initrd(void);
#endif /* _POWERPC_KERNEL_SETUP_H */
......@@ -40,6 +40,8 @@
#include <asm/xmon.h>
#include <asm/time.h>
#include "setup.h"
#define DBG(fmt...)
#if defined CONFIG_KGDB
......
......@@ -61,6 +61,8 @@
#include <asm/xmon.h>
#include <asm/udbg.h>
#include "setup.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
......
......@@ -103,6 +103,9 @@ static void intReceived(struct XmPciLpEvent *eventParm,
struct pt_regs *regsParm)
{
int irq;
#ifdef CONFIG_IRQSTACKS
struct thread_info *curtp, *irqtp;
#endif
++Pci_Interrupt_Count;
......@@ -110,7 +113,20 @@ static void intReceived(struct XmPciLpEvent *eventParm,
case XmPciLpEvent_SlotInterrupt:
irq = eventParm->hvLpEvent.xCorrelationToken;
/* Dispatch the interrupt handlers for this irq */
ppc_irq_dispatch_handler(regsParm, irq);
#ifdef CONFIG_IRQSTACKS
/* Switch to the irq stack to handle this */
curtp = current_thread_info();
irqtp = hardirq_ctx[smp_processor_id()];
if (curtp != irqtp) {
irqtp->task = curtp->task;
irqtp->flags = 0;
call___do_IRQ(irq, regsParm, irqtp);
irqtp->task = NULL;
if (irqtp->flags)
set_bits(irqtp->flags, &curtp->flags);
} else
#endif
__do_IRQ(irq, regsParm);
HvCallPci_eoi(eventParm->eventData.slotInterrupt.busNumber,
eventParm->eventData.slotInterrupt.subBusNumber,
eventParm->eventData.slotInterrupt.deviceId);
......@@ -310,10 +326,8 @@ static void iSeries_disable_IRQ(unsigned int irq)
}
/*
* Need to define this so ppc_irq_dispatch_handler will NOT call
* enable_IRQ at the end of interrupt handling. However, this does
* nothing because there is not enough information provided to do
* the EOI HvCall. This is done by XmPciLpEvent.c
* This does nothing because there is not enough information
* provided to do the EOI HvCall. This is done by XmPciLpEvent.c
*/
static void iSeries_end_IRQ(unsigned int irq)
{
......
......@@ -74,6 +74,9 @@ static DEFINE_SPINLOCK(pmac_pic_lock);
#define GATWICK_IRQ_POOL_SIZE 10
static struct interrupt_info gatwick_int_pool[GATWICK_IRQ_POOL_SIZE];
#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
static unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
/*
* Mark an irq as "lost". This is only used on the pmac
* since it can lose interrupts (see pmac_set_irq_mask).
......
......@@ -567,6 +567,7 @@ void xics_init_IRQ(void)
xics_8259_pic.enable = i8259_pic.enable;
xics_8259_pic.disable = i8259_pic.disable;
xics_8259_pic.end = i8259_pic.end;
for (i = 0; i < 16; ++i)
get_irq_desc(i)->handler = &xics_8259_pic;
for (; i < NR_IRQS; ++i)
......
......@@ -12,7 +12,7 @@ extra-$(CONFIG_6xx) += idle_6xx.o
extra-$(CONFIG_POWER4) += idle_power4.o
extra-y += vmlinux.lds
obj-y := entry.o traps.o irq.o idle.o time.o misc.o \
obj-y := entry.o traps.o idle.o time.o misc.o \
process.o align.o \
setup.o \
ppc_htab.o
......@@ -38,8 +38,7 @@ endif
# These are here while we do the architecture merge
else
obj-y := irq.o idle.o \
align.o
obj-y := idle.o align.o
obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o
obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
obj-$(CONFIG_MODULES) += module.o
......
/*
* arch/ppc/kernel/irq.c
*
* Derived from arch/i386/kernel/irq.c
* Copyright (C) 1992 Linus Torvalds
* Adapted from arch/i386 by Gary Thomas
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
* Updated and modified by Cort Dougan <cort@fsmlabs.com>
* Copyright (C) 1996-2001 Cort Dougan
* Adapted for Power Macintosh by Paul Mackerras
* Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
* Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
*
* This file contains the code used by various IRQ handling routines:
* asking for different IRQ's should be done through these routines
* instead of just grabbing them. Thus setups with different IRQ numbers
* shouldn't result in any weird surprises, and installing new handlers
* should be easier.
*
* The MPC8xx has an interrupt mask in the SIU. If a bit is set, the
* interrupt is _enabled_. As expected, IRQ0 is bit 0 in the 32-bit
* mask register (of which only 16 are defined), hence the weird shifting
* and complement of the cached_irq_mask. I want to be able to stuff
* this right into the SIU SMASK register.
* Many of the prep/chrp functions are conditional compiled on CONFIG_8xx
* to reduce code space and undefined function references.
*/
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/threads.h>
#include <linux/kernel_stat.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/timex.h>
#include <linux/config.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/proc_fs.h>
#include <linux/random.h>
#include <linux/seq_file.h>
#include <linux/cpumask.h>
#include <linux/profile.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/cache.h>
#include <asm/prom.h>
#include <asm/ptrace.h>
#include <asm/machdep.h>
#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
extern atomic_t ipi_recv;
extern atomic_t ipi_sent;
#define MAXCOUNT 10000000
int ppc_spurious_interrupts = 0;
struct irqaction *ppc_irq_action[NR_IRQS];
unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
atomic_t ppc_n_lost_interrupts;
#ifdef CONFIG_TAU_INT
extern int tau_initialized;
extern int tau_interrupts(int);
#endif
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irqaction * action;
unsigned long flags;
if (i == 0) {
seq_puts(p, " ");
for (j=0; j<NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "CPU%d ", j);
seq_putc(p, '\n');
}
if (i < NR_IRQS) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if ( !action || !action->handler )
goto skip;
seq_printf(p, "%3d: ", i);
#ifdef CONFIG_SMP
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ",
kstat_cpu(j).irqs[i]);
#else
seq_printf(p, "%10u ", kstat_irqs(i));
#endif /* CONFIG_SMP */
if (irq_desc[i].handler)
seq_printf(p, " %s ", irq_desc[i].handler->typename);
else
seq_puts(p, " None ");
seq_printf(p, "%s", (irq_desc[i].status & IRQ_LEVEL) ? "Level " : "Edge ");
seq_printf(p, " %s", action->name);
for (action = action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS) {
#ifdef CONFIG_TAU_INT
if (tau_initialized){
seq_puts(p, "TAU: ");
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
seq_printf(p, "%10u ", tau_interrupts(j));
seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n");
}
#endif
#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
/* should this be per processor send/receive? */
seq_printf(p, "IPI (recv/sent): %10u/%u\n",
atomic_read(&ipi_recv), atomic_read(&ipi_sent));
#endif
seq_printf(p, "BAD: %10u\n", ppc_spurious_interrupts);
}
return 0;
}
void do_IRQ(struct pt_regs *regs)
{
int irq, first = 1;
irq_enter();
/*
* Every platform is required to implement ppc_md.get_irq.
* This function will either return an irq number or -1 to
* indicate there are no more pending. But the first time
* through the loop this means there wasn't and IRQ pending.
* The value -2 is for buggy hardware and means that this IRQ
* has already been handled. -- Tom
*/
while ((irq = ppc_md.get_irq(regs)) >= 0) {
__do_IRQ(irq, regs);
first = 0;
}
if (irq != -2 && first)
/* That's not SMP safe ... but who cares ? */
ppc_spurious_interrupts++;
irq_exit();
}
void __init init_IRQ(void)
{
ppc_md.init_IRQ();
}
......@@ -78,7 +78,6 @@ EXPORT_SYMBOL(program_check_exception);
EXPORT_SYMBOL(single_step_exception);
EXPORT_SYMBOL(sys_sigreturn);
EXPORT_SYMBOL(ppc_n_lost_interrupts);
EXPORT_SYMBOL(ppc_lost_interrupts);
EXPORT_SYMBOL(ISA_DMA_THRESHOLD);
EXPORT_SYMBOL(DMA_MODE_READ);
......
......@@ -75,6 +75,9 @@ static DEFINE_SPINLOCK(pmac_pic_lock);
#define GATWICK_IRQ_POOL_SIZE 10
static struct interrupt_info gatwick_int_pool[GATWICK_IRQ_POOL_SIZE];
#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
static unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
/*
* Mark an irq as "lost". This is only used on the pmac
* since it can lose interrupts (see pmac_set_irq_mask).
......
......@@ -11,7 +11,7 @@ obj-y := misc.o prom.o
endif
obj-y += irq.o idle.o dma.o \
obj-y += idle.o dma.o \
align.o \
udbg.o \
rtc.o \
......
......@@ -78,12 +78,12 @@ _GLOBAL(call_do_softirq)
mtlr r0
blr
_GLOBAL(call_handle_IRQ_event)
_GLOBAL(call___do_IRQ)
mflr r0
std r0,16(r1)
stdu r1,THREAD_SIZE-112(r6)
mr r1,r6
bl .handle_IRQ_event
stdu r1,THREAD_SIZE-112(r5)
mr r1,r5
bl .__do_IRQ
ld r1,0(r1)
ld r0,16(r1)
mtlr r0
......
......@@ -12,7 +12,6 @@
#include <asm/processor.h>
extern void timer_interrupt(struct pt_regs *);
extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
#ifdef CONFIG_PPC_ISERIES
......
......@@ -429,7 +429,6 @@ extern u64 ppc64_interrupt_controller;
#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
/* pedantic: these are long because they are used with set_bit --RR */
extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
extern unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
extern atomic_t ppc_n_lost_interrupts;
#define virt_irq_create_mapping(x) (x)
......@@ -488,8 +487,8 @@ extern struct thread_info *softirq_ctx[NR_CPUS];
extern void irq_ctx_init(void);
extern void call_do_softirq(struct thread_info *tp);
extern int call_handle_IRQ_event(int irq, struct pt_regs *regs,
struct irqaction *action, struct thread_info *tp);
extern int call___do_IRQ(int irq, struct pt_regs *regs,
struct thread_info *tp);
#define __ARCH_HAS_DO_SOFTIRQ
......
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