diff options
Diffstat (limited to 'arch/m68k/include/asm/thread_info_no.h')
-rw-r--r-- | arch/m68k/include/asm/thread_info_no.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/thread_info_no.h b/arch/m68k/include/asm/thread_info_no.h new file mode 100644 index 00000000000..82529f424ea --- /dev/null +++ b/arch/m68k/include/asm/thread_info_no.h @@ -0,0 +1,100 @@ +/* thread_info.h: m68knommu low-level thread information + * adapted from the i386 and PPC versions by Greg Ungerer (gerg@snapgear.com) + * + * 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 + +#include <asm/page.h> + +#ifdef __KERNEL__ + +#ifndef __ASSEMBLY__ + +/* + * Size of kernel stack for each process. This must be a power of 2... + */ +#ifdef CONFIG_4KSTACKS +#define THREAD_SIZE_ORDER (0) +#else +#define THREAD_SIZE_ORDER (1) +#endif + +/* + * for asm files, THREAD_SIZE is now generated by asm-offsets.c + */ +#define THREAD_SIZE (PAGE_SIZE<<THREAD_SIZE_ORDER) + +/* + * low level task data. + */ +struct thread_info { + struct task_struct *task; /* main task structure */ + struct exec_domain *exec_domain; /* execution domain */ + unsigned long flags; /* low level flags */ + int cpu; /* cpu we're on */ + int preempt_count; /* 0 => preemptable, <0 => BUG */ + struct restart_block restart_block; +}; + +/* + * 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, \ + .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) +{ + struct thread_info *ti; + __asm__( + "move.l %%sp, %0 \n\t" + "and.l %1, %0" + : "=&d"(ti) + : "di" (~(THREAD_SIZE-1)) + ); + return ti; +} + +#endif /* __ASSEMBLY__ */ + +#define PREEMPT_ACTIVE 0x4000000 + +/* + * 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_MEMDIE 4 +#define TIF_FREEZE 16 /* is freezing for suspend */ + +/* 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_FREEZE (1<<TIF_FREEZE) + +#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */ + +#endif /* __KERNEL__ */ + +#endif /* _ASM_THREAD_INFO_H */ |