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sparc32,sun4c: irq file cleanup

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- drop filename in header
- drop unused includes
- add description of sun4c interrupts (from davem)
- add spaces after reserved words

This is partly based on a patch from: David Miller <davem@davemloft.net>

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sam Ravnborg 2011-01-28 22:08:19 +00:00 committed by David S. Miller
parent b7afdb7e85
commit e787098cfe
1 changed files with 44 additions and 37 deletions
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81
arch/sparc/kernel/sun4c_irq.c
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@ -1,5 +1,5 @@
/* sun4c_irq.c
* arch/sparc/kernel/sun4c_irq.c:
/*
* sun4c irq support
*
* djhr: Hacked out of irq.c into a CPU dependent version.
*
@ -9,31 +9,41 @@
* Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
*/
#include <linux/errno.h>
#include <linux/linkage.h>
#include <linux/kernel_stat.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include "irq.h"
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/psr.h>
#include <asm/vaddrs.h>
#include <asm/timer.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/traps.h>
#include <asm/timer.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/idprom.h>
#include <asm/machines.h>
#include "irq.h"
/* Sun4c interrupts are typically laid out as follows:
*
* 1 - Software interrupt, SBUS level 1
* 2 - SBUS level 2
* 3 - ESP SCSI, SBUS level 3
* 4 - Software interrupt
* 5 - Lance ethernet, SBUS level 4
* 6 - Software interrupt
* 7 - Graphics card, SBUS level 5
* 8 - SBUS level 6
* 9 - SBUS level 7
* 10 - Counter timer
* 11 - Floppy
* 12 - Zilog uart
* 13 - CS4231 audio
* 14 - Profiling timer
* 15 - NMI
*
* The interrupt enable bits in the interrupt mask register are
* really only used to enable/disable the timer interrupts, and
* for signalling software interrupts. There is also a master
* interrupt enable bit in this register.
*
* Interrupts are enabled by setting the SUN4C_INT_* bits, they
* are disabled by clearing those bits.
*/
/*
* Bit field defines for the interrupt registers on various
@ -49,26 +59,21 @@
#define SUN4C_INT_E4 0x04 /* Enable level 4 IRQ. */
#define SUN4C_INT_E1 0x02 /* Enable level 1 IRQ. */
/* Pointer to the interrupt enable byte
*
* Dave Redman (djhr@tadpole.co.uk)
* What you may not be aware of is that entry.S requires this variable.
*
* --- linux_trap_nmi_sun4c --
*
* so don't go making it static, like I tried. sigh.
/*
* Pointer to the interrupt enable byte
* Used by entry.S
*/
unsigned char __iomem *interrupt_enable = NULL;
unsigned char __iomem *interrupt_enable;
static void sun4c_disable_irq(unsigned int irq_nr)
{
unsigned long flags;
unsigned char current_mask, new_mask;
local_irq_save(flags);
irq_nr &= (NR_IRQS - 1);
current_mask = sbus_readb(interrupt_enable);
switch(irq_nr) {
switch (irq_nr) {
case 1:
new_mask = ((current_mask) & (~(SUN4C_INT_E1)));
break;
@ -93,11 +98,11 @@ static void sun4c_enable_irq(unsigned int irq_nr)
{
unsigned long flags;
unsigned char current_mask, new_mask;
local_irq_save(flags);
irq_nr &= (NR_IRQS - 1);
current_mask = sbus_readb(interrupt_enable);
switch(irq_nr) {
switch (irq_nr) {
case 1:
new_mask = ((current_mask) | SUN4C_INT_E1);
break;
@ -180,12 +185,14 @@ static void __init sun4c_init_timers(irq_handler_t counter_fn)
prom_printf("sun4c_init_timers: request_irq() fails with %d\n", err);
prom_halt();
}
sun4c_disable_irq(irq[1].pri);
}
#ifdef CONFIG_SMP
static void sun4c_nop(void) {}
static void sun4c_nop(void)
{
}
#endif
void __init sun4c_init_IRQ(void)