177 lines
4.7 KiB
C
177 lines
4.7 KiB
C
/*
|
|
* Copyright (C) 2006 Atmark Techno, Inc.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#ifndef _ASM_MICROBLAZE_THREAD_INFO_H
|
|
#define _ASM_MICROBLAZE_THREAD_INFO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* we have 8k stack */
|
|
#define THREAD_SHIFT 13
|
|
#define THREAD_SIZE (1 << THREAD_SHIFT)
|
|
#define THREAD_SIZE_ORDER 1
|
|
|
|
#ifndef __ASSEMBLY__
|
|
# include <linux/types.h>
|
|
# include <asm/processor.h>
|
|
|
|
/*
|
|
* low level task data that entry.S needs immediate access to
|
|
* - this struct should fit entirely inside of one cache line
|
|
* - this struct shares the supervisor stack pages
|
|
* - if the contents of this structure are changed, the assembly constants
|
|
* must also be changed
|
|
*/
|
|
|
|
struct cpu_context {
|
|
__u32 r1; /* stack pointer */
|
|
__u32 r2;
|
|
/* dedicated registers */
|
|
__u32 r13;
|
|
__u32 r14;
|
|
__u32 r15;
|
|
__u32 r16;
|
|
__u32 r17;
|
|
__u32 r18;
|
|
/* non-volatile registers */
|
|
__u32 r19;
|
|
__u32 r20;
|
|
__u32 r21;
|
|
__u32 r22;
|
|
__u32 r23;
|
|
__u32 r24;
|
|
__u32 r25;
|
|
__u32 r26;
|
|
__u32 r27;
|
|
__u32 r28;
|
|
__u32 r29;
|
|
__u32 r30;
|
|
/* r31 is used as current task pointer */
|
|
/* special purpose registers */
|
|
__u32 msr;
|
|
__u32 ear;
|
|
__u32 esr;
|
|
__u32 fsr;
|
|
};
|
|
|
|
typedef struct {
|
|
unsigned long seg;
|
|
} mm_segment_t;
|
|
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
unsigned long flags; /* low level flags */
|
|
unsigned long status; /* thread-synchronous flags */
|
|
__u32 cpu; /* current CPU */
|
|
__s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/
|
|
mm_segment_t addr_limit; /* thread address space */
|
|
struct restart_block restart_block;
|
|
|
|
struct cpu_context cpu_context;
|
|
};
|
|
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*/
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
|
.addr_limit = KERNEL_DS, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
}
|
|
|
|
#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 */
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
register unsigned long sp asm("r1");
|
|
|
|
return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
|
|
}
|
|
|
|
/* thread information allocation */
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#define PREEMPT_ACTIVE 0x10000000
|
|
|
|
/*
|
|
* thread information flags
|
|
* - these are process state flags that various assembly files may
|
|
* need to access
|
|
* - pending work-to-be-done flags are in LSW
|
|
* - other flags in MSW
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
|
|
#define TIF_SIGPENDING 2 /* signal pending */
|
|
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
|
|
/* restore singlestep on return to user mode */
|
|
#define TIF_SINGLESTEP 4
|
|
#define TIF_IRET 5 /* return with iret */
|
|
#define TIF_MEMDIE 6 /* is terminating due to OOM killer */
|
|
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
|
|
#define TIF_SECCOMP 10 /* secure computing */
|
|
#define TIF_FREEZE 14 /* Freezing for suspend */
|
|
|
|
/* true if poll_idle() is polling TIF_NEED_RESCHED */
|
|
#define TIF_POLLING_NRFLAG 16
|
|
|
|
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
|
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
|
|
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
|
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
|
|
#define _TIF_IRET (1 << TIF_IRET)
|
|
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
|
|
#define _TIF_FREEZE (1 << TIF_FREEZE)
|
|
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
|
|
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
|
|
|
|
/* work to do in syscall trace */
|
|
#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
|
|
_TIF_SYSCALL_AUDIT | _TIF_SECCOMP)
|
|
|
|
/* work to do on interrupt/exception return */
|
|
#define _TIF_WORK_MASK 0x0000FFFE
|
|
|
|
/* work to do on any return to u-space */
|
|
#define _TIF_ALLWORK_MASK 0x0000FFFF
|
|
|
|
/*
|
|
* Thread-synchronous status.
|
|
*
|
|
* This is different from the flags in that nobody else
|
|
* ever touches our thread-synchronous status, so we don't
|
|
* have to worry about atomic accesses.
|
|
*/
|
|
/* FPU was used by this task this quantum (SMP) */
|
|
#define TS_USEDFPU 0x0001
|
|
#define TS_RESTORE_SIGMASK 0x0002
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define HAVE_SET_RESTORE_SIGMASK 1
|
|
static inline void set_restore_sigmask(void)
|
|
{
|
|
struct thread_info *ti = current_thread_info();
|
|
ti->status |= TS_RESTORE_SIGMASK;
|
|
set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
|
|
}
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_MICROBLAZE_THREAD_INFO_H */
|