projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 687b12ba AJ |
1 | /* |
| 2 | * Port on Texas Instruments TMS320C6x architecture | |
| 3 | * | |
| 4 | * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated | |
| 5 | * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) | |
| 6 | * | |
| 7 | * Updated for 2.6.3x: Mark Salter <msalter@redhat.com> | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU General Public License version 2 as | |
| 11 | * published by the Free Software Foundation. | |
| 12 | */ | |
| 13 | #ifndef _ASM_C6X_THREAD_INFO_H | |
| 14 | #define _ASM_C6X_THREAD_INFO_H | |
| 15 | ||
| 16 | #ifdef __KERNEL__ | |
| 17 | ||
| 18 | #include <asm/page.h> | |
| 19 | ||
| 20 | #ifdef CONFIG_4KSTACKS | |
| 21 | #define THREAD_SIZE 4096 | |
| 22 | #define THREAD_SHIFT 12 | |
| 7b8fe057 | 23 | #define THREAD_SIZE_ORDER 0 |
| 687b12ba AJ |
24 | #else |
| 25 | #define THREAD_SIZE 8192 | |
| 26 | #define THREAD_SHIFT 13 | |
| 7b8fe057 | 27 | #define THREAD_SIZE_ORDER 1 |
| 687b12ba AJ |
28 | #endif |
| 29 | ||
| 30 | #define THREAD_START_SP (THREAD_SIZE - 8) | |
| 31 | ||
| 32 | #ifndef __ASSEMBLY__ | |
| 33 | ||
| 34 | typedef struct { | |
| 35 | unsigned long seg; | |
| 36 | } mm_segment_t; | |
| 37 | ||
| 38 | /* | |
| 39 | * low level task data. | |
| 40 | */ | |
| 41 | struct thread_info { | |
| 42 | struct task_struct *task; /* main task structure */ | |
| 43 | struct exec_domain *exec_domain; /* execution domain */ | |
| 44 | unsigned long flags; /* low level flags */ | |
| 45 | int cpu; /* cpu we're on */ | |
| 46 | int preempt_count; /* 0 = preemptable, <0 = BUG */ | |
| 47 | mm_segment_t addr_limit; /* thread address space */ | |
| 687b12ba AJ |
48 | }; |
| 49 | ||
| 50 | /* | |
| 51 | * macros/functions for gaining access to the thread information structure | |
| 52 | * | |
| 53 | * preempt_count needs to be 1 initially, until the scheduler is functional. | |
| 54 | */ | |
| 55 | #define INIT_THREAD_INFO(tsk) \ | |
| 56 | { \ | |
| 57 | .task = &tsk, \ | |
| 58 | .exec_domain = &default_exec_domain, \ | |
| 59 | .flags = 0, \ | |
| 60 | .cpu = 0, \ | |
| 61 | .preempt_count = INIT_PREEMPT_COUNT, \ | |
| 62 | .addr_limit = KERNEL_DS, \ | |
| 687b12ba AJ |
63 | } |
| 64 | ||
| 65 | #define init_thread_info (init_thread_union.thread_info) | |
| 66 | #define init_stack (init_thread_union.stack) | |
| 67 | ||
| 68 | /* get the thread information struct of current task */ | |
| 69 | static inline __attribute__((const)) | |
| 70 | struct thread_info *current_thread_info(void) | |
| 71 | { | |
| 72 | struct thread_info *ti; | |
| 73 | asm volatile (" clr .s2 B15,0,%1,%0\n" | |
| 74 | : "=b" (ti) | |
| 75 | : "Iu5" (THREAD_SHIFT - 1)); | |
| 76 | return ti; | |
| 77 | } | |
| 78 | ||
| 687b12ba AJ |
79 | #define get_thread_info(ti) get_task_struct((ti)->task) |
| 80 | #define put_thread_info(ti) put_task_struct((ti)->task) | |
| 81 | #endif /* __ASSEMBLY__ */ | |
| 82 | ||
| 687b12ba AJ |
83 | /* |
| 84 | * thread information flag bit numbers | |
| 85 | * - pending work-to-be-done flags are in LSW | |
| 86 | * - other flags in MSW | |
| 87 | */ | |
| 88 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
| 89 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ | |
| 90 | #define TIF_SIGPENDING 2 /* signal pending */ | |
| 91 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
| 92 | #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ | |
| 93 | ||
| 687b12ba AJ |
94 | #define TIF_MEMDIE 17 /* OOM killer killed process */ |
| 95 | ||
| 96 | #define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */ | |
| 97 | #define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */ | |
| 98 | ||
| 99 | #endif /* __KERNEL__ */ | |
| 100 | ||
| 101 | #endif /* _ASM_C6X_THREAD_INFO_H */ |