#ifndef __ASM_SH64_THREAD_INFO_H #define __ASM_SH64_THREAD_INFO_H /* * SuperH 5 version * Copyright (C) 2003 Paul Mundt */ #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #include <asm/registers.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 thread_info { struct task_struct *task; /* main task structure */ struct exec_domain *exec_domain; /* execution domain */ unsigned long flags; /* low level flags */ /* Put the 4 32-bit fields together to make asm offsetting easier. */ int preempt_count; /* 0 => preemptable, <0 => BUG */ __u16 cpu; mm_segment_t addr_limit; struct restart_block restart_block; __u8 supervisor_stack[0]; }; /* * 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 = 1, \ .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) { struct thread_info *ti; __asm__ __volatile__ ("getcon " __KCR0 ", %0\n\t" : "=r" (ti)); return ti; } /* thread information allocation */ #define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) #define free_thread_info(ti) free_pages((unsigned long) (ti), 1) #define get_thread_info(ti) get_task_struct((ti)->task) #define put_thread_info(ti) put_task_struct((ti)->task) #endif /* __ASSEMBLY__ */ #define THREAD_SIZE 8192 #define PREEMPT_ACTIVE 0x10000000 /* thread information flags */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_MEMDIE 4 #endif /* __KERNEL__ */ #endif /* __ASM_SH64_THREAD_INFO_H */