1cddafa35SGreg Ungerer #ifndef _ASM_M68K_THREAD_INFO_H 2cddafa35SGreg Ungerer #define _ASM_M68K_THREAD_INFO_H 3cddafa35SGreg Ungerer 4cddafa35SGreg Ungerer #include <asm/types.h> 5cddafa35SGreg Ungerer #include <asm/page.h> 6cddafa35SGreg Ungerer 7cddafa35SGreg Ungerer /* 8cddafa35SGreg Ungerer * On machines with 4k pages we default to an 8k thread size, though we 9cddafa35SGreg Ungerer * allow a 4k with config option. Any other machine page size then 10cddafa35SGreg Ungerer * the thread size must match the page size (which is 8k and larger here). 11cddafa35SGreg Ungerer */ 12cddafa35SGreg Ungerer #if PAGE_SHIFT < 13 13cddafa35SGreg Ungerer #ifdef CONFIG_4KSTACKS 14cddafa35SGreg Ungerer #define THREAD_SIZE 4096 1549148020SSam Ravnborg #else 16cddafa35SGreg Ungerer #define THREAD_SIZE 8192 1749148020SSam Ravnborg #endif 18cddafa35SGreg Ungerer #else 19cddafa35SGreg Ungerer #define THREAD_SIZE PAGE_SIZE 20cddafa35SGreg Ungerer #endif 21cddafa35SGreg Ungerer #define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) 22cddafa35SGreg Ungerer 23cddafa35SGreg Ungerer #ifndef __ASSEMBLY__ 24cddafa35SGreg Ungerer 25cddafa35SGreg Ungerer struct thread_info { 26cddafa35SGreg Ungerer struct task_struct *task; /* main task structure */ 27cddafa35SGreg Ungerer unsigned long flags; 28cddafa35SGreg Ungerer struct exec_domain *exec_domain; /* execution domain */ 29cddafa35SGreg Ungerer int preempt_count; /* 0 => preemptable, <0 => BUG */ 30cddafa35SGreg Ungerer __u32 cpu; /* should always be 0 on m68k */ 31cddafa35SGreg Ungerer unsigned long tp_value; /* thread pointer */ 32cddafa35SGreg Ungerer struct restart_block restart_block; 33cddafa35SGreg Ungerer }; 34cddafa35SGreg Ungerer #endif /* __ASSEMBLY__ */ 35cddafa35SGreg Ungerer 36cddafa35SGreg Ungerer #define PREEMPT_ACTIVE 0x4000000 37cddafa35SGreg Ungerer 38cddafa35SGreg Ungerer #define INIT_THREAD_INFO(tsk) \ 39cddafa35SGreg Ungerer { \ 40cddafa35SGreg Ungerer .task = &tsk, \ 41cddafa35SGreg Ungerer .exec_domain = &default_exec_domain, \ 42cddafa35SGreg Ungerer .preempt_count = INIT_PREEMPT_COUNT, \ 43cddafa35SGreg Ungerer .restart_block = { \ 44cddafa35SGreg Ungerer .fn = do_no_restart_syscall, \ 45cddafa35SGreg Ungerer }, \ 46cddafa35SGreg Ungerer } 47cddafa35SGreg Ungerer 48cddafa35SGreg Ungerer #define init_stack (init_thread_union.stack) 49cddafa35SGreg Ungerer 50cddafa35SGreg Ungerer #ifdef CONFIG_MMU 51cddafa35SGreg Ungerer 52cddafa35SGreg Ungerer #ifndef __ASSEMBLY__ 53cddafa35SGreg Ungerer #include <asm/current.h> 54cddafa35SGreg Ungerer #endif 55cddafa35SGreg Ungerer 56cddafa35SGreg Ungerer #ifdef ASM_OFFSETS_C 57cddafa35SGreg Ungerer #define task_thread_info(tsk) ((struct thread_info *) NULL) 58cddafa35SGreg Ungerer #else 59cddafa35SGreg Ungerer #include <asm/asm-offsets.h> 60cddafa35SGreg Ungerer #define task_thread_info(tsk) ((struct thread_info *)((char *)tsk+TASK_TINFO)) 61cddafa35SGreg Ungerer #endif 62cddafa35SGreg Ungerer 63cddafa35SGreg Ungerer #define init_thread_info (init_task.thread.info) 64cddafa35SGreg Ungerer #define task_stack_page(tsk) ((tsk)->stack) 65cddafa35SGreg Ungerer #define current_thread_info() task_thread_info(current) 66cddafa35SGreg Ungerer 67cddafa35SGreg Ungerer #define __HAVE_THREAD_FUNCTIONS 68cddafa35SGreg Ungerer 69cddafa35SGreg Ungerer #define setup_thread_stack(p, org) ({ \ 70cddafa35SGreg Ungerer *(struct task_struct **)(p)->stack = (p); \ 71cddafa35SGreg Ungerer task_thread_info(p)->task = (p); \ 72cddafa35SGreg Ungerer }) 73cddafa35SGreg Ungerer 74cddafa35SGreg Ungerer #define end_of_stack(p) ((unsigned long *)(p)->stack + 1) 75cddafa35SGreg Ungerer 76cddafa35SGreg Ungerer #else /* !CONFIG_MMU */ 77cddafa35SGreg Ungerer 78cddafa35SGreg Ungerer #ifndef __ASSEMBLY__ 79cddafa35SGreg Ungerer /* how to get the thread information struct from C */ 80cddafa35SGreg Ungerer static inline struct thread_info *current_thread_info(void) 81cddafa35SGreg Ungerer { 82cddafa35SGreg Ungerer struct thread_info *ti; 83cddafa35SGreg Ungerer __asm__( 84cddafa35SGreg Ungerer "move.l %%sp, %0 \n\t" 85cddafa35SGreg Ungerer "and.l %1, %0" 86cddafa35SGreg Ungerer : "=&d"(ti) 87cddafa35SGreg Ungerer : "di" (~(THREAD_SIZE-1)) 88cddafa35SGreg Ungerer ); 89cddafa35SGreg Ungerer return ti; 90cddafa35SGreg Ungerer } 91cddafa35SGreg Ungerer #endif 92cddafa35SGreg Ungerer 93cddafa35SGreg Ungerer #define init_thread_info (init_thread_union.thread_info) 94cddafa35SGreg Ungerer 95cddafa35SGreg Ungerer #endif /* CONFIG_MMU */ 96cddafa35SGreg Ungerer 97cddafa35SGreg Ungerer /* entry.S relies on these definitions! 98cddafa35SGreg Ungerer * bits 0-7 are tested at every exception exit 99cddafa35SGreg Ungerer * bits 8-15 are also tested at syscall exit 100cddafa35SGreg Ungerer */ 101cddafa35SGreg Ungerer #define TIF_SIGPENDING 6 /* signal pending */ 102cddafa35SGreg Ungerer #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 103cddafa35SGreg Ungerer #define TIF_DELAYED_TRACE 14 /* single step a syscall */ 104cddafa35SGreg Ungerer #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 105cddafa35SGreg Ungerer #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ 106cddafa35SGreg Ungerer #define TIF_FREEZE 17 /* thread is freezing for suspend */ 107e68847feSAl Viro #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ 108cddafa35SGreg Ungerer 109cddafa35SGreg Ungerer #endif /* _ASM_M68K_THREAD_INFO_H */ 110