[PATCH] xtensa: fix irq and misc fixes

Update the architecture specific interrupt handling code for Xtensa to support
the new API.  Use generic BUG macros in bug.h, and some minor fixes.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Chris Zankel 2006-12-10 02:18:47 -08:00 committed by Linus Torvalds
parent 5fcf7bb73f
commit fd43fe19b8
8 changed files with 65 additions and 86 deletions

View file

@ -4,7 +4,7 @@
* Xtensa built-in interrupt controller and some generic functions copied
* from i386.
*
* Copyright (C) 2002 - 2005 Tensilica, Inc.
* Copyright (C) 2002 - 2006 Tensilica, Inc.
* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
*
*
@ -22,11 +22,6 @@
#include <asm/uaccess.h>
#include <asm/platform.h>
static void enable_xtensa_irq(unsigned int irq);
static void disable_xtensa_irq(unsigned int irq);
static void mask_and_ack_xtensa(unsigned int irq);
static void end_xtensa_irq(unsigned int irq);
static unsigned int cached_irq_mask;
atomic_t irq_err_count;
@ -46,8 +41,16 @@ void ack_bad_irq(unsigned int irq)
* handlers).
*/
unsigned int do_IRQ(int irq, struct pt_regs *regs)
asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
struct irq_desc *desc = irq_desc + irq;
if (irq >= NR_IRQS) {
printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
__FUNCTION__, irq);
}
irq_enter();
#ifdef CONFIG_DEBUG_STACKOVERFLOW
@ -63,12 +66,10 @@ unsigned int do_IRQ(int irq, struct pt_regs *regs)
sp - sizeof(struct thread_info));
}
#endif
__do_IRQ(irq, regs);
desc->handle_irq(irq, desc);
irq_exit();
return 1;
set_irq_regs(old_regs);
}
/*
@ -118,72 +119,68 @@ int show_interrupts(struct seq_file *p, void *v)
}
return 0;
}
/* shutdown is same as "disable" */
#define shutdown_xtensa_irq disable_xtensa_irq
static unsigned int startup_xtensa_irq(unsigned int irq)
{
enable_xtensa_irq(irq);
return 0; /* never anything pending */
}
static struct hw_interrupt_type xtensa_irq_type = {
"Xtensa-IRQ",
startup_xtensa_irq,
shutdown_xtensa_irq,
enable_xtensa_irq,
disable_xtensa_irq,
mask_and_ack_xtensa,
end_xtensa_irq
};
static inline void mask_irq(unsigned int irq)
static void xtensa_irq_mask(unsigned int irq)
{
cached_irq_mask &= ~(1 << irq);
set_sr (cached_irq_mask, INTENABLE);
}
static inline void unmask_irq(unsigned int irq)
static void xtensa_irq_unmask(unsigned int irq)
{
cached_irq_mask |= 1 << irq;
set_sr (cached_irq_mask, INTENABLE);
}
static void disable_xtensa_irq(unsigned int irq)
static void xtensa_irq_ack(unsigned int irq)
{
unsigned long flags;
local_save_flags(flags);
mask_irq(irq);
local_irq_restore(flags);
set_sr(1 << irq, INTCLEAR);
}
static void enable_xtensa_irq(unsigned int irq)
static int xtensa_irq_retrigger(unsigned int irq)
{
unsigned long flags;
local_save_flags(flags);
unmask_irq(irq);
local_irq_restore(flags);
set_sr (1 << irq, INTSET);
return 1;
}
static void mask_and_ack_xtensa(unsigned int irq)
{
disable_xtensa_irq(irq);
}
static void end_xtensa_irq(unsigned int irq)
{
enable_xtensa_irq(irq);
}
static struct irq_chip xtensa_irq_chip = {
.name = "xtensa",
.mask = xtensa_irq_mask,
.unmask = xtensa_irq_unmask,
.ack = xtensa_irq_ack,
.retrigger = xtensa_irq_retrigger,
};
void __init init_IRQ(void)
{
int i;
int index;
for (i=0; i < XTENSA_NR_IRQS; i++)
irq_desc[i].chip = &xtensa_irq_type;
for (index = 0; index < XTENSA_NR_IRQS; index++) {
int mask = 1 << index;
if (mask & XCHAL_INTTYPE_MASK_SOFTWARE)
set_irq_chip_and_handler(index, &xtensa_irq_chip,
handle_simple_irq);
else if (mask & XCHAL_INTTYPE_MASK_EXTERN_EDGE)
set_irq_chip_and_handler(index, &xtensa_irq_chip,
handle_edge_irq);
else if (mask & XCHAL_INTTYPE_MASK_EXTERN_LEVEL)
set_irq_chip_and_handler(index, &xtensa_irq_chip,
handle_level_irq);
else if (mask & XCHAL_INTTYPE_MASK_TIMER)
set_irq_chip_and_handler(index, &xtensa_irq_chip,
handle_edge_irq);
else /* XCHAL_INTTYPE_MASK_WRITE_ERROR */
/* XCHAL_INTTYPE_MASK_NMI */
set_irq_chip_and_handler(index, &xtensa_irq_chip,
handle_level_irq);
}
cached_irq_mask = 0;
platform_init_irq();
}

View file

@ -47,7 +47,7 @@ unsigned long long sched_clock(void)
return (unsigned long long)jiffies * (1000000000 / HZ);
}
static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static irqreturn_t timer_interrupt(int irq, void *dev_id);
static struct irqaction timer_irqaction = {
.handler = timer_interrupt,
.flags = IRQF_DISABLED,
@ -150,7 +150,7 @@ EXPORT_SYMBOL(do_gettimeofday);
* The timer interrupt is called HZ times per second.
*/
irqreturn_t timer_interrupt (int irq, void *dev_id, struct pt_regs *regs)
irqreturn_t timer_interrupt (int irq, void *dev_id)
{
unsigned long next;
@ -160,9 +160,9 @@ irqreturn_t timer_interrupt (int irq, void *dev_id, struct pt_regs *regs)
again:
while ((signed long)(get_ccount() - next) > 0) {
profile_tick(CPU_PROFILING, regs);
profile_tick(CPU_PROFILING);
#ifndef CONFIG_SMP
update_process_times(user_mode(regs));
update_process_times(user_mode(get_irq_regs()));
#endif
write_seqlock(&xtime_lock);

View file

@ -17,6 +17,7 @@
#include <asm-generic/vmlinux.lds.h>
#define _NOCLANGUAGE
#undef __ASSEMBLER__
#include <xtensa/config/core.h>
#include <xtensa/config/system.h>
OUTPUT_ARCH(xtensa)

View file

@ -13,29 +13,6 @@
#ifndef _XTENSA_BUG_H
#define _XTENSA_BUG_H
#include <linux/stringify.h>
#define ILL __asm__ __volatile__ (".byte 0,0,0\n")
#ifdef CONFIG_KALLSYMS
# define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
ILL; \
} while (0)
#else
# define BUG() do { \
printk("kernel BUG!\n"); \
ILL; \
} while (0)
#endif
#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
#define PAGE_BUG(page) do { BUG(); } while (0)
#define WARN_ON(condition) do { \
if (unlikely((condition)!=0)) { \
printk ("Warning in %s at %s:%d\n", __FUNCTION__, __FILE__, __LINE__); \
dump_stack(); \
} \
} while (0)
#include <asm-generic/bug.h>
#endif /* _XTENSA_BUG_H */

View file

@ -14,7 +14,7 @@
#include <asm/processor.h>
#include <asm/types.h>
static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
{
__u32 res;
/* instruction sequence from Xtensa ISA release 2/2000 */
@ -29,7 +29,7 @@ static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
return res;
}
static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
{
/* Given that 'short' values are signed (i.e., can be negative),
* we cannot assume that the upper 16-bits of the register are

View file

@ -0,0 +1 @@
#include <asm-generic/irq_regs.h>

View file

@ -218,6 +218,8 @@
#define SYSXTENSA_COUNT 5 /* count of syscall0 functions*/
#ifdef __KERNEL__
/*
* "Conditional" syscalls
*
@ -230,6 +232,7 @@
#define __ARCH_WANT_SYS_UTIME
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_RT_SIGACTION
#endif /* __KERNEL__ */
#endif /* _XTENSA_UNISTD_H */

View file

@ -115,7 +115,7 @@
/* ... */
#ifdef _ASMLANGUAGE
#ifdef __ASSEMBLER__
/*
* Assembly-language specific definitions (assembly macros, etc.).
*/