1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2cddafa35SGreg Ungerer #ifndef _ASM_M68K_THREAD_INFO_H 3cddafa35SGreg Ungerer #define _ASM_M68K_THREAD_INFO_H 4cddafa35SGreg Ungerer 5cddafa35SGreg Ungerer #include <asm/types.h> 6cddafa35SGreg Ungerer #include <asm/page.h> 7feb1ee75SGreg Ungerer #include <asm/segment.h> 8cddafa35SGreg Ungerer 9cddafa35SGreg Ungerer /* 10cddafa35SGreg Ungerer * On machines with 4k pages we default to an 8k thread size, though we 11cddafa35SGreg Ungerer * allow a 4k with config option. Any other machine page size then 12cddafa35SGreg Ungerer * the thread size must match the page size (which is 8k and larger here). 13cddafa35SGreg Ungerer */ 14cddafa35SGreg Ungerer #if PAGE_SHIFT < 13 15cddafa35SGreg Ungerer #ifdef CONFIG_4KSTACKS 16cddafa35SGreg Ungerer #define THREAD_SIZE 4096 1749148020SSam Ravnborg #else 18cddafa35SGreg Ungerer #define THREAD_SIZE 8192 1949148020SSam Ravnborg #endif 20cddafa35SGreg Ungerer #else 21cddafa35SGreg Ungerer #define THREAD_SIZE PAGE_SIZE 22cddafa35SGreg Ungerer #endif 23cddafa35SGreg Ungerer #define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) 24cddafa35SGreg Ungerer 25cddafa35SGreg Ungerer #ifndef __ASSEMBLY__ 26cddafa35SGreg Ungerer 27cddafa35SGreg Ungerer struct thread_info { 28cddafa35SGreg Ungerer struct task_struct *task; /* main task structure */ 29cddafa35SGreg Ungerer unsigned long flags; 30feb1ee75SGreg Ungerer mm_segment_t addr_limit; /* thread address space */ 31cddafa35SGreg Ungerer int preempt_count; /* 0 => preemptable, <0 => BUG */ 32cddafa35SGreg Ungerer __u32 cpu; /* should always be 0 on m68k */ 33cddafa35SGreg Ungerer unsigned long tp_value; /* thread pointer */ 34cddafa35SGreg Ungerer }; 35cddafa35SGreg Ungerer #endif /* __ASSEMBLY__ */ 36cddafa35SGreg Ungerer 37cddafa35SGreg Ungerer #define INIT_THREAD_INFO(tsk) \ 38cddafa35SGreg Ungerer { \ 39cddafa35SGreg Ungerer .task = &tsk, \ 40feb1ee75SGreg Ungerer .addr_limit = KERNEL_DS, \ 41cddafa35SGreg Ungerer .preempt_count = INIT_PREEMPT_COUNT, \ 42cddafa35SGreg Ungerer } 43cddafa35SGreg Ungerer 44cddafa35SGreg Ungerer #ifndef __ASSEMBLY__ 45cddafa35SGreg Ungerer /* how to get the thread information struct from C */ 46cddafa35SGreg Ungerer static inline struct thread_info *current_thread_info(void) 47cddafa35SGreg Ungerer { 48cddafa35SGreg Ungerer struct thread_info *ti; 49cddafa35SGreg Ungerer __asm__( 50cddafa35SGreg Ungerer "move.l %%sp, %0 \n\t" 51cddafa35SGreg Ungerer "and.l %1, %0" 52cddafa35SGreg Ungerer : "=&d"(ti) 53cddafa35SGreg Ungerer : "di" (~(THREAD_SIZE-1)) 54cddafa35SGreg Ungerer ); 55cddafa35SGreg Ungerer return ti; 56cddafa35SGreg Ungerer } 57cddafa35SGreg Ungerer #endif 58cddafa35SGreg Ungerer 59cddafa35SGreg Ungerer /* entry.S relies on these definitions! 60cddafa35SGreg Ungerer * bits 0-7 are tested at every exception exit 61cddafa35SGreg Ungerer * bits 8-15 are also tested at syscall exit 62cddafa35SGreg Ungerer */ 63a54f1655SAl Viro #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 64cddafa35SGreg Ungerer #define TIF_SIGPENDING 6 /* signal pending */ 65cddafa35SGreg Ungerer #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 66cddafa35SGreg Ungerer #define TIF_DELAYED_TRACE 14 /* single step a syscall */ 67cddafa35SGreg Ungerer #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 68cddafa35SGreg Ungerer #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ 69e68847feSAl Viro #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ 70cddafa35SGreg Ungerer 7162148d98SGeert Uytterhoeven #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 7262148d98SGeert Uytterhoeven #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 7362148d98SGeert Uytterhoeven #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 7462148d98SGeert Uytterhoeven #define _TIF_DELAYED_TRACE (1 << TIF_DELAYED_TRACE) 7562148d98SGeert Uytterhoeven #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 7662148d98SGeert Uytterhoeven #define _TIF_MEMDIE (1 << TIF_MEMDIE) 7762148d98SGeert Uytterhoeven #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) 7862148d98SGeert Uytterhoeven 79cddafa35SGreg Ungerer #endif /* _ASM_M68K_THREAD_INFO_H */ 80