mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
47cab6a722
As Andrew noted, my previous patch ("debug lockups: Improve lockup
detection") broke/removed SysRq-L support from architecture that do
not provide a __trigger_all_cpu_backtrace implementation.
Restore a fallback path and clean up the SysRq-L machinery a bit:
- Rename the arch method to arch_trigger_all_cpu_backtrace()
- Simplify the define
- Document the method a bit - in the hope of more architectures
adding support for it.
[ The patch touches Sparc code for the rename. ]
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "David S. Miller" <davem@davemloft.net>
LKML-Reference: <20090802140809.7ec4bb6b.akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/* irq.h: IRQ registers on the 64-bit Sparc.
|
|
*
|
|
* Copyright (C) 1996 David S. Miller (davem@davemloft.net)
|
|
* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
|
|
*/
|
|
|
|
#ifndef _SPARC64_IRQ_H
|
|
#define _SPARC64_IRQ_H
|
|
|
|
#include <linux/linkage.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/interrupt.h>
|
|
#include <asm/pil.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
/* IMAP/ICLR register defines */
|
|
#define IMAP_VALID 0x80000000UL /* IRQ Enabled */
|
|
#define IMAP_TID_UPA 0x7c000000UL /* UPA TargetID */
|
|
#define IMAP_TID_JBUS 0x7c000000UL /* JBUS TargetID */
|
|
#define IMAP_TID_SHIFT 26
|
|
#define IMAP_AID_SAFARI 0x7c000000UL /* Safari AgentID */
|
|
#define IMAP_AID_SHIFT 26
|
|
#define IMAP_NID_SAFARI 0x03e00000UL /* Safari NodeID */
|
|
#define IMAP_NID_SHIFT 21
|
|
#define IMAP_IGN 0x000007c0UL /* IRQ Group Number */
|
|
#define IMAP_INO 0x0000003fUL /* IRQ Number */
|
|
#define IMAP_INR 0x000007ffUL /* Full interrupt number*/
|
|
|
|
#define ICLR_IDLE 0x00000000UL /* Idle state */
|
|
#define ICLR_TRANSMIT 0x00000001UL /* Transmit state */
|
|
#define ICLR_PENDING 0x00000003UL /* Pending state */
|
|
|
|
/* The largest number of unique interrupt sources we support.
|
|
* If this needs to ever be larger than 255, you need to change
|
|
* the type of ino_bucket->virt_irq as appropriate.
|
|
*
|
|
* ino_bucket->virt_irq allocation is made during {sun4v_,}build_irq().
|
|
*/
|
|
#define NR_IRQS 255
|
|
|
|
extern void irq_install_pre_handler(int virt_irq,
|
|
void (*func)(unsigned int, void *, void *),
|
|
void *arg1, void *arg2);
|
|
#define irq_canonicalize(irq) (irq)
|
|
extern unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap);
|
|
extern unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino);
|
|
extern unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino);
|
|
extern unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p,
|
|
unsigned int msi_devino_start,
|
|
unsigned int msi_devino_end);
|
|
extern void sun4v_destroy_msi(unsigned int virt_irq);
|
|
extern unsigned int sun4u_build_msi(u32 portid, unsigned int *virt_irq_p,
|
|
unsigned int msi_devino_start,
|
|
unsigned int msi_devino_end,
|
|
unsigned long imap_base,
|
|
unsigned long iclr_base);
|
|
extern void sun4u_destroy_msi(unsigned int virt_irq);
|
|
|
|
extern unsigned char virt_irq_alloc(unsigned int dev_handle,
|
|
unsigned int dev_ino);
|
|
#ifdef CONFIG_PCI_MSI
|
|
extern void virt_irq_free(unsigned int virt_irq);
|
|
#endif
|
|
|
|
extern void __init init_IRQ(void);
|
|
extern void fixup_irqs(void);
|
|
|
|
static inline void set_softint(unsigned long bits)
|
|
{
|
|
__asm__ __volatile__("wr %0, 0x0, %%set_softint"
|
|
: /* No outputs */
|
|
: "r" (bits));
|
|
}
|
|
|
|
static inline void clear_softint(unsigned long bits)
|
|
{
|
|
__asm__ __volatile__("wr %0, 0x0, %%clear_softint"
|
|
: /* No outputs */
|
|
: "r" (bits));
|
|
}
|
|
|
|
static inline unsigned long get_softint(void)
|
|
{
|
|
unsigned long retval;
|
|
|
|
__asm__ __volatile__("rd %%softint, %0"
|
|
: "=r" (retval));
|
|
return retval;
|
|
}
|
|
|
|
void arch_trigger_all_cpu_backtrace(void);
|
|
#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
|
|
|
|
extern void *hardirq_stack[NR_CPUS];
|
|
extern void *softirq_stack[NR_CPUS];
|
|
#define __ARCH_HAS_DO_SOFTIRQ
|
|
#define ARCH_HAS_NMI_WATCHDOG
|
|
|
|
#endif
|