mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-20 00:11:22 +00:00
637a6ff6ce
Replace some of the hard-coded constants with PAGE_SIZE/SHIFT/ORDER where appropriate. Likewise, in a couple of places it doesn't make sense to base some allocations on page size when all that's required is a constant 4K, etc. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/* thread_info.h: PPC 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_THREAD_INFO_H
|
|
#define _ASM_THREAD_INFO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/config.h>
|
|
#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;
|
|
/* set by force_successful_syscall_return */
|
|
unsigned char syscall_noerror;
|
|
/* 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 */
|
|
|
|
#define THREAD_SHIFT 14
|
|
#define THREAD_ORDER (THREAD_SHIFT - PAGE_SHIFT)
|
|
#define THREAD_SIZE (1 << THREAD_SHIFT)
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
#define alloc_thread_info(tsk) \
|
|
({ \
|
|
struct thread_info *ret; \
|
|
\
|
|
ret = kmalloc(THREAD_SIZE, GFP_KERNEL); \
|
|
if (ret) \
|
|
memset(ret, 0, THREAD_SIZE); \
|
|
ret; \
|
|
})
|
|
#else
|
|
#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
|
|
#endif
|
|
#define free_thread_info(ti) kfree(ti)
|
|
#define get_thread_info(ti) get_task_struct((ti)->task)
|
|
#define put_thread_info(ti) put_task_struct((ti)->task)
|
|
|
|
/* how to get the thread information struct from C */
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
struct thread_info *ti;
|
|
__asm__("clrrdi %0,1,%1" : "=r"(ti) : "i" (THREAD_SHIFT));
|
|
return ti;
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#define PREEMPT_ACTIVE 0x10000000
|
|
|
|
/*
|
|
* thread information flag bit numbers
|
|
*/
|
|
#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 */
|
|
#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
|
|
TIF_NEED_RESCHED */
|
|
#define TIF_32BIT 5 /* 32 bit binary */
|
|
/* #define SPARE 6 */
|
|
#define TIF_ABI_PENDING 7 /* 32/64 bit switch needed */
|
|
#define TIF_SYSCALL_AUDIT 8 /* syscall auditing active */
|
|
#define TIF_SINGLESTEP 9 /* singlestepping active */
|
|
#define TIF_MEMDIE 10
|
|
#define TIF_SECCOMP 11 /* secure computing */
|
|
|
|
/* as above, but as bit values */
|
|
#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_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
|
|
#define _TIF_32BIT (1<<TIF_32BIT)
|
|
/* #define _SPARE (1<<SPARE) */
|
|
#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
|
|
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
|
|
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
|
|
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
|
|
#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
|
|
|
|
#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
|
|
_TIF_NEED_RESCHED)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_THREAD_INFO_H */
|