mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
a583f1b542
Remove unused TIF_NOTIFY_RESUME flag for all processor architectures. The flag was not used excecpt on IA-64 where the patch replaces it with TIF_PERFMON_WORK. Signed-off-by: stephane eranian <eranian@hpl.hp.com> Cc: <linux-arch@vger.kernel.org> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
160 lines
4.9 KiB
C
160 lines
4.9 KiB
C
/* thread_info.h: PowerPC low-level thread information
|
|
* adapted from the i386 version by Paul Mackerras
|
|
*
|
|
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
|
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
|
|
*/
|
|
|
|
#ifndef _ASM_POWERPC_THREAD_INFO_H
|
|
#define _ASM_POWERPC_THREAD_INFO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* We have 8k stacks on ppc32 and 16k on ppc64 */
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#define THREAD_SHIFT 14
|
|
#else
|
|
#define THREAD_SHIFT 13
|
|
#endif
|
|
|
|
#define THREAD_SIZE (1 << THREAD_SHIFT)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/cache.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/page.h>
|
|
#include <linux/stringify.h>
|
|
|
|
/*
|
|
* low level task data.
|
|
*/
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
int cpu; /* cpu we're on */
|
|
int preempt_count; /* 0 => preemptable,
|
|
<0 => BUG */
|
|
struct restart_block restart_block;
|
|
unsigned long local_flags; /* private flags for thread */
|
|
|
|
/* low level flags - has atomic operations done on it */
|
|
unsigned long flags ____cacheline_aligned_in_smp;
|
|
};
|
|
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*
|
|
* preempt_count needs to be 1 initially, until the scheduler is functional.
|
|
*/
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.cpu = 0, \
|
|
.preempt_count = 1, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
.flags = 0, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/* thread information allocation */
|
|
|
|
#if THREAD_SHIFT >= PAGE_SHIFT
|
|
|
|
#define THREAD_ORDER (THREAD_SHIFT - PAGE_SHIFT)
|
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
#define alloc_thread_info(tsk) \
|
|
((struct thread_info *)__get_free_pages(GFP_KERNEL | \
|
|
__GFP_ZERO, THREAD_ORDER))
|
|
#else
|
|
#define alloc_thread_info(tsk) \
|
|
((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_ORDER))
|
|
#endif
|
|
#define free_thread_info(ti) free_pages((unsigned long)ti, THREAD_ORDER)
|
|
|
|
#else /* THREAD_SHIFT < PAGE_SHIFT */
|
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
#define alloc_thread_info(tsk) kzalloc(THREAD_SIZE, GFP_KERNEL)
|
|
#else
|
|
#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
|
|
#endif
|
|
#define free_thread_info(ti) kfree(ti)
|
|
|
|
#endif /* THREAD_SHIFT < PAGE_SHIFT */
|
|
|
|
/* how to get the thread information struct from C */
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
register unsigned long sp asm("r1");
|
|
|
|
/* gcc4, at least, is smart enough to turn this into a single
|
|
* rlwinm for ppc32 and clrrdi for ppc64 */
|
|
return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#define PREEMPT_ACTIVE 0x10000000
|
|
|
|
/*
|
|
* thread information flag bit numbers
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_SIGPENDING 1 /* signal pending */
|
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
|
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
|
|
TIF_NEED_RESCHED */
|
|
#define TIF_32BIT 4 /* 32 bit binary */
|
|
#define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */
|
|
#define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */
|
|
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
|
|
#define TIF_SINGLESTEP 8 /* singlestepping active */
|
|
#define TIF_MEMDIE 9
|
|
#define TIF_SECCOMP 10 /* secure computing */
|
|
#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
|
|
#define TIF_NOERROR 12 /* Force successful syscall return */
|
|
#define TIF_RESTORE_SIGMASK 13 /* Restore signal mask in do_signal */
|
|
#define TIF_FREEZE 14 /* Freezing for suspend */
|
|
#define TIF_RUNLATCH 15 /* Is the runlatch enabled? */
|
|
#define TIF_ABI_PENDING 16 /* 32/64 bit switch needed */
|
|
|
|
/* as above, but as bit values */
|
|
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
|
|
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
|
|
#define _TIF_32BIT (1<<TIF_32BIT)
|
|
#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
|
|
#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)
|
|
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
|
|
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
|
|
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
|
|
#define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
|
|
#define _TIF_NOERROR (1<<TIF_NOERROR)
|
|
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
|
|
#define _TIF_FREEZE (1<<TIF_FREEZE)
|
|
#define _TIF_RUNLATCH (1<<TIF_RUNLATCH)
|
|
#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
|
|
#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
|
|
|
|
#define _TIF_USER_WORK_MASK ( _TIF_SIGPENDING | \
|
|
_TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
|
|
#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
|
|
|
|
/* Bits in local_flags */
|
|
/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
|
|
#define TLF_NAPPING 0 /* idle thread enabled NAP mode */
|
|
|
|
#define _TLF_NAPPING (1 << TLF_NAPPING)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_POWERPC_THREAD_INFO_H */
|