115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
#ifndef _ALPHA_THREAD_INFO_H
|
|
#define _ALPHA_THREAD_INFO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/processor.h>
|
|
#include <asm/types.h>
|
|
#include <asm/hwrpb.h>
|
|
#include <asm/sysinfo.h>
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
struct thread_info {
|
|
struct pcb_struct pcb; /* palcode state */
|
|
|
|
struct task_struct *task; /* main task structure */
|
|
unsigned int flags; /* low level flags */
|
|
unsigned int ieee_state; /* see fpu.h */
|
|
|
|
mm_segment_t addr_limit; /* thread address space */
|
|
unsigned cpu; /* current CPU */
|
|
int preempt_count; /* 0 => preemptable, <0 => BUG */
|
|
unsigned int status; /* thread-synchronous flags */
|
|
|
|
int bpt_nsaved;
|
|
unsigned long bpt_addr[2]; /* breakpoint handling */
|
|
unsigned int bpt_insn[2];
|
|
};
|
|
|
|
/*
|
|
* Macros/functions for gaining access to the thread information structure.
|
|
*/
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.addr_limit = KERNEL_DS, \
|
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/* How to get the thread information struct from C. */
|
|
register struct thread_info *__current_thread_info __asm__("$8");
|
|
#define current_thread_info() __current_thread_info
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
/* Thread information allocation. */
|
|
#define THREAD_SIZE_ORDER 1
|
|
#define THREAD_SIZE (2*PAGE_SIZE)
|
|
|
|
/*
|
|
* Thread information flags:
|
|
* - these are process state flags and used from assembly
|
|
* - pending work-to-be-done flags come first and must be assigned to be
|
|
* within bits 0 to 7 to fit in and immediate operand.
|
|
*
|
|
* TIF_SYSCALL_TRACE is known to be 0 via blbs.
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
|
|
#define TIF_SIGPENDING 2 /* signal pending */
|
|
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
|
|
#define TIF_SYSCALL_AUDIT 4 /* syscall audit active */
|
|
#define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */
|
|
#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
|
|
#define TIF_POLLING_NRFLAG 14 /* idle is polling for TIF_NEED_RESCHED */
|
|
|
|
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
|
|
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
|
|
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
|
|
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
|
|
|
|
/* Work to do on interrupt/exception return. */
|
|
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
|
|
_TIF_NOTIFY_RESUME)
|
|
|
|
/* Work to do on any return to userspace. */
|
|
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \
|
|
| _TIF_SYSCALL_TRACE)
|
|
|
|
#define TS_UAC_NOPRINT 0x0001 /* ! Preserve the following three */
|
|
#define TS_UAC_NOFIX 0x0002 /* ! flags as they match */
|
|
#define TS_UAC_SIGBUS 0x0004 /* ! userspace part of 'osf_sysinfo' */
|
|
|
|
#define SET_UNALIGN_CTL(task,value) ({ \
|
|
__u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \
|
|
if (value & PR_UNALIGN_NOPRINT) \
|
|
status |= TS_UAC_NOPRINT; \
|
|
if (value & PR_UNALIGN_SIGBUS) \
|
|
status |= TS_UAC_SIGBUS; \
|
|
if (value & 4) /* alpha-specific */ \
|
|
status |= TS_UAC_NOFIX; \
|
|
task_thread_info(task)->status = status; \
|
|
0; })
|
|
|
|
#define GET_UNALIGN_CTL(task,value) ({ \
|
|
__u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \
|
|
__u32 res = 0; \
|
|
if (status & TS_UAC_NOPRINT) \
|
|
res |= PR_UNALIGN_NOPRINT; \
|
|
if (status & TS_UAC_SIGBUS) \
|
|
res |= PR_UNALIGN_SIGBUS; \
|
|
if (status & TS_UAC_NOFIX) \
|
|
res |= 4; \
|
|
put_user(res, (int __user *)(value)); \
|
|
})
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ALPHA_THREAD_INFO_H */
|