projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| cddafa35 GU |
2 | #ifndef _ASM_M68K_THREAD_INFO_H |
| 3 | #define _ASM_M68K_THREAD_INFO_H | |
| 4 | ||
| 5 | #include <asm/types.h> | |
| 6 | #include <asm/page.h> | |
| feb1ee75 | 7 | #include <asm/segment.h> |
| cddafa35 GU |
8 | |
| 9 | /* | |
| 10 | * On machines with 4k pages we default to an 8k thread size, though we | |
| 11 | * allow a 4k with config option. Any other machine page size then | |
| 12 | * the thread size must match the page size (which is 8k and larger here). | |
| 13 | */ | |
| 14 | #if PAGE_SHIFT < 13 | |
| 15 | #ifdef CONFIG_4KSTACKS | |
| 16 | #define THREAD_SIZE 4096 | |
| 49148020 | 17 | #else |
| cddafa35 | 18 | #define THREAD_SIZE 8192 |
| 49148020 | 19 | #endif |
| cddafa35 GU |
20 | #else |
| 21 | #define THREAD_SIZE PAGE_SIZE | |
| 22 | #endif | |
| 23 | #define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) | |
| 24 | ||
| 25 | #ifndef __ASSEMBLY__ | |
| 26 | ||
| 27 | struct thread_info { | |
| 28 | struct task_struct *task; /* main task structure */ | |
| 29 | unsigned long flags; | |
| feb1ee75 | 30 | mm_segment_t addr_limit; /* thread address space */ |
| cddafa35 GU |
31 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
| 32 | __u32 cpu; /* should always be 0 on m68k */ | |
| 33 | unsigned long tp_value; /* thread pointer */ | |
| cddafa35 GU |
34 | }; |
| 35 | #endif /* __ASSEMBLY__ */ | |
| 36 | ||
| cddafa35 GU |
37 | #define INIT_THREAD_INFO(tsk) \ |
| 38 | { \ | |
| 39 | .task = &tsk, \ | |
| feb1ee75 | 40 | .addr_limit = KERNEL_DS, \ |
| cddafa35 | 41 | .preempt_count = INIT_PREEMPT_COUNT, \ |
| cddafa35 GU |
42 | } |
| 43 | ||
| 44 | #define init_stack (init_thread_union.stack) | |
| 45 | ||
| cddafa35 GU |
46 | #ifndef __ASSEMBLY__ |
| 47 | /* how to get the thread information struct from C */ | |
| 48 | static inline struct thread_info *current_thread_info(void) | |
| 49 | { | |
| 50 | struct thread_info *ti; | |
| 51 | __asm__( | |
| 52 | "move.l %%sp, %0 \n\t" | |
| 53 | "and.l %1, %0" | |
| 54 | : "=&d"(ti) | |
| 55 | : "di" (~(THREAD_SIZE-1)) | |
| 56 | ); | |
| 57 | return ti; | |
| 58 | } | |
| 59 | #endif | |
| 60 | ||
| 61 | #define init_thread_info (init_thread_union.thread_info) | |
| 62 | ||
| cddafa35 GU |
63 | /* entry.S relies on these definitions! |
| 64 | * bits 0-7 are tested at every exception exit | |
| 65 | * bits 8-15 are also tested at syscall exit | |
| 66 | */ | |
| a54f1655 | 67 | #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ |
| cddafa35 GU |
68 | #define TIF_SIGPENDING 6 /* signal pending */ |
| 69 | #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ | |
| 70 | #define TIF_DELAYED_TRACE 14 /* single step a syscall */ | |
| 71 | #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ | |
| 72 | #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ | |
| e68847fe | 73 | #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ |
| cddafa35 GU |
74 | |
| 75 | #endif /* _ASM_M68K_THREAD_INFO_H */ |