| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Port on Texas Instruments TMS320C6x architecture |
| * |
| * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated |
| * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) |
| * |
| * Updated for 2.6.3x: Mark Salter <msalter@redhat.com> |
| */ |
| #ifndef _ASM_C6X_THREAD_INFO_H |
| #define _ASM_C6X_THREAD_INFO_H |
| |
| #ifdef __KERNEL__ |
| |
| #include <asm/page.h> |
| |
| #ifdef CONFIG_4KSTACKS |
| #define THREAD_SIZE 4096 |
| #define THREAD_SHIFT 12 |
| #define THREAD_SIZE_ORDER 0 |
| #else |
| #define THREAD_SIZE 8192 |
| #define THREAD_SHIFT 13 |
| #define THREAD_SIZE_ORDER 1 |
| #endif |
| |
| #define THREAD_START_SP (THREAD_SIZE - 8) |
| |
| #ifndef __ASSEMBLY__ |
| |
| typedef struct { |
| unsigned long seg; |
| } mm_segment_t; |
| |
| /* |
| * low level task data. |
| */ |
| struct thread_info { |
| struct task_struct *task; /* main task structure */ |
| unsigned long flags; /* low level flags */ |
| int cpu; /* cpu we're on */ |
| int preempt_count; /* 0 = preemptable, <0 = BUG */ |
| mm_segment_t addr_limit; /* thread address space */ |
| }; |
| |
| /* |
| * macros/functions for gaining access to the thread information structure |
| * |
| * preempt_count needs to be 1 initially, until the scheduler is functional. |
| */ |
| #define INIT_THREAD_INFO(tsk) \ |
| { \ |
| .task = &tsk, \ |
| .flags = 0, \ |
| .cpu = 0, \ |
| .preempt_count = INIT_PREEMPT_COUNT, \ |
| .addr_limit = KERNEL_DS, \ |
| } |
| |
| /* get the thread information struct of current task */ |
| static inline __attribute__((const)) |
| struct thread_info *current_thread_info(void) |
| { |
| struct thread_info *ti; |
| asm volatile (" clr .s2 B15,0,%1,%0\n" |
| : "=b" (ti) |
| : "Iu5" (THREAD_SHIFT - 1)); |
| return ti; |
| } |
| |
| #define get_thread_info(ti) get_task_struct((ti)->task) |
| #define put_thread_info(ti) put_task_struct((ti)->task) |
| #endif /* __ASSEMBLY__ */ |
| |
| /* |
| * thread information flag bit numbers |
| * - pending work-to-be-done flags are in LSW |
| * - other flags in MSW |
| */ |
| #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
| #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ |
| #define TIF_SIGPENDING 2 /* signal pending */ |
| #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
| #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ |
| #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ |
| |
| #define TIF_MEMDIE 17 /* OOM killer killed process */ |
| |
| #define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */ |
| #define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */ |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _ASM_C6X_THREAD_INFO_H */ |