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m68k/m68knommu: merge MMU and non-MMU thread_info.h
The MMU and non-MMU versions of thread_info.h are quite similar. Merge the two files. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Greg Ungerer
Geert Uytterhoeven
parent
69f99746a2
commit
cddafa3500
@ -3,6 +3,9 @@
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#include <asm/setup.h>
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#include <asm/page.h>
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#ifdef __ASSEMBLY__
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#include <asm/thread_info.h>
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#endif
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/*
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* Stack layout in 'ret_from_exception':
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@ -1,5 +1,108 @@
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#ifdef __uClinux__
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#include "thread_info_no.h"
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#ifndef _ASM_M68K_THREAD_INFO_H
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#define _ASM_M68K_THREAD_INFO_H
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#include <asm/types.h>
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#include <asm/page.h>
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/*
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* On machines with 4k pages we default to an 8k thread size, though we
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* allow a 4k with config option. Any other machine page size then
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* the thread size must match the page size (which is 8k and larger here).
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*/
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#if PAGE_SHIFT < 13
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#ifdef CONFIG_4KSTACKS
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#define THREAD_SIZE 4096
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#else
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#include "thread_info_mm.h"
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#define THREAD_SIZE 8192
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#endif
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#else
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#define THREAD_SIZE PAGE_SIZE
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#endif
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#define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1)
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#ifndef __ASSEMBLY__
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags;
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struct exec_domain *exec_domain; /* execution domain */
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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__u32 cpu; /* should always be 0 on m68k */
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unsigned long tp_value; /* thread pointer */
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struct restart_block restart_block;
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};
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#endif /* __ASSEMBLY__ */
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#define PREEMPT_ACTIVE 0x4000000
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.exec_domain = &default_exec_domain, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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#define init_stack (init_thread_union.stack)
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#ifdef CONFIG_MMU
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#ifndef __ASSEMBLY__
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#include <asm/current.h>
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#endif
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#ifdef ASM_OFFSETS_C
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#define task_thread_info(tsk) ((struct thread_info *) NULL)
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#else
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#include <asm/asm-offsets.h>
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#define task_thread_info(tsk) ((struct thread_info *)((char *)tsk+TASK_TINFO))
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#endif
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#define init_thread_info (init_task.thread.info)
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#define task_stack_page(tsk) ((tsk)->stack)
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#define current_thread_info() task_thread_info(current)
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#define __HAVE_THREAD_FUNCTIONS
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#define setup_thread_stack(p, org) ({ \
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*(struct task_struct **)(p)->stack = (p); \
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task_thread_info(p)->task = (p); \
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})
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#define end_of_stack(p) ((unsigned long *)(p)->stack + 1)
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#else /* !CONFIG_MMU */
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#ifndef __ASSEMBLY__
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/* how to get the thread information struct from C */
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static inline struct thread_info *current_thread_info(void)
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{
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struct thread_info *ti;
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__asm__(
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"move.l %%sp, %0 \n\t"
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"and.l %1, %0"
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: "=&d"(ti)
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: "di" (~(THREAD_SIZE-1))
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);
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return ti;
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}
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#endif
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#define init_thread_info (init_thread_union.thread_info)
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#endif /* CONFIG_MMU */
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/* entry.S relies on these definitions!
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* bits 0-7 are tested at every exception exit
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* bits 8-15 are also tested at syscall exit
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*/
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#define TIF_SIGPENDING 6 /* signal pending */
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#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
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#define TIF_DELAYED_TRACE 14 /* single step a syscall */
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#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
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#define TIF_MEMDIE 16 /* is terminating due to OOM killer */
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#define TIF_FREEZE 17 /* thread is freezing for suspend */
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#endif /* _ASM_M68K_THREAD_INFO_H */
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@ -1,76 +0,0 @@
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#ifndef _ASM_M68K_THREAD_INFO_H
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#define _ASM_M68K_THREAD_INFO_H
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#ifndef ASM_OFFSETS_C
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#include <asm/asm-offsets.h>
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#endif
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#include <asm/types.h>
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#include <asm/page.h>
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#ifndef __ASSEMBLY__
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#include <asm/current.h>
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags;
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struct exec_domain *exec_domain; /* execution domain */
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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__u32 cpu; /* should always be 0 on m68k */
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unsigned long tp_value; /* thread pointer */
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struct restart_block restart_block;
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};
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#endif /* __ASSEMBLY__ */
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#define PREEMPT_ACTIVE 0x4000000
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.exec_domain = &default_exec_domain, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */
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#if PAGE_SHIFT < 13
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#define THREAD_SIZE (8192)
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#else
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#define THREAD_SIZE PAGE_SIZE
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#endif
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#define THREAD_SIZE_ORDER (13 - PAGE_SHIFT)
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#define init_thread_info (init_task.thread.info)
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#define init_stack (init_thread_union.stack)
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#ifdef ASM_OFFSETS_C
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#define task_thread_info(tsk) ((struct thread_info *) NULL)
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#else
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#define task_thread_info(tsk) ((struct thread_info *)((char *)tsk+TASK_TINFO))
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#endif
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#define task_stack_page(tsk) ((tsk)->stack)
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#define current_thread_info() task_thread_info(current)
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#define __HAVE_THREAD_FUNCTIONS
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#define setup_thread_stack(p, org) ({ \
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*(struct task_struct **)(p)->stack = (p); \
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task_thread_info(p)->task = (p); \
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})
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#define end_of_stack(p) ((unsigned long *)(p)->stack + 1)
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/* entry.S relies on these definitions!
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* bits 0-7 are tested at every exception exit
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* bits 8-15 are also tested at syscall exit
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*/
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#define TIF_SIGPENDING 6 /* signal pending */
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#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
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#define TIF_DELAYED_TRACE 14 /* single step a syscall */
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#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
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#define TIF_MEMDIE 16 /* is terminating due to OOM killer */
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#define TIF_FREEZE 17 /* thread is freezing for suspend */
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#endif /* _ASM_M68K_THREAD_INFO_H */
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@ -1,102 +0,0 @@
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/* thread_info.h: m68knommu low-level thread information
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* adapted from the i386 and PPC versions by Greg Ungerer (gerg@snapgear.com)
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*
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* Copyright (C) 2002 David Howells (dhowells@redhat.com)
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* - Incorporating suggestions made by Linus Torvalds and Dave Miller
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*/
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#ifndef _ASM_THREAD_INFO_H
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#define _ASM_THREAD_INFO_H
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#include <asm/page.h>
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#ifdef __KERNEL__
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/*
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* Size of kernel stack for each process. This must be a power of 2...
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*/
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#ifdef CONFIG_4KSTACKS
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#define THREAD_SIZE_ORDER (0)
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#else
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#define THREAD_SIZE_ORDER (1)
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#endif
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/*
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* for asm files, THREAD_SIZE is now generated by asm-offsets.c
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*/
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#define THREAD_SIZE (PAGE_SIZE<<THREAD_SIZE_ORDER)
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#ifndef __ASSEMBLY__
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/*
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* low level task data.
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*/
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struct thread_info {
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struct task_struct *task; /* main task structure */
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struct exec_domain *exec_domain; /* execution domain */
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unsigned long flags; /* low level flags */
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int cpu; /* cpu we're on */
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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unsigned long tp_value; /* thread pointer */
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struct restart_block restart_block;
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};
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/*
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* macros/functions for gaining access to the thread information structure
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*/
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.exec_domain = &default_exec_domain, \
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.flags = 0, \
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.cpu = 0, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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/* how to get the thread information struct from C */
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static inline struct thread_info *current_thread_info(void)
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{
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struct thread_info *ti;
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__asm__(
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"move.l %%sp, %0 \n\t"
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"and.l %1, %0"
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: "=&d"(ti)
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: "di" (~(THREAD_SIZE-1))
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);
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return ti;
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}
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#endif /* __ASSEMBLY__ */
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#define PREEMPT_ACTIVE 0x4000000
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/*
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* thread information flag bit numbers
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
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TIF_NEED_RESCHED */
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#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
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#define TIF_FREEZE 16 /* is freezing for suspend */
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/* as above, but as bit values */
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#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
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#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
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#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
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#define _TIF_FREEZE (1<<TIF_FREEZE)
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#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
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#endif /* __KERNEL__ */
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#endif /* _ASM_THREAD_INFO_H */
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@ -112,7 +112,7 @@ ret_from_exception:
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andl #-THREAD_SIZE,%d1 /* at base of kernel stack */
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movel %d1,%a0
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movel %a0@(TI_FLAGS),%d1 /* get thread_info->flags */
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andl #_TIF_NEED_RESCHED,%d1
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andl #(1<<TIF_NEED_RESCHED),%d1
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jeq Lkernel_return
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movel %a0@(TI_PREEMPTCOUNT),%d1
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@ -136,7 +136,7 @@ Luser_return:
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andl #-THREAD_SIZE,%d1 /* at base of kernel stack */
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movel %d1,%a0
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movel %a0@(TI_FLAGS),%d1 /* get thread_info->flags */
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andl #_TIF_WORK_MASK,%d1
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andl #0xefff,%d1
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jne Lwork_to_do /* still work to do */
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Lreturn:
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