diff options
Diffstat (limited to 'arch/unicore32/include/asm/thread_info.h')
| -rw-r--r-- | arch/unicore32/include/asm/thread_info.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/thread_info.h b/arch/unicore32/include/asm/thread_info.h new file mode 100644 index 00000000..89f75575 --- /dev/null +++ b/arch/unicore32/include/asm/thread_info.h @@ -0,0 +1,152 @@ +/* + * linux/arch/unicore32/include/asm/thread_info.h + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __UNICORE_THREAD_INFO_H__ +#define __UNICORE_THREAD_INFO_H__ + +#ifdef __KERNEL__ + +#include <linux/compiler.h> +#include <asm/fpstate.h> + +#define THREAD_SIZE_ORDER 1 +#define THREAD_SIZE 8192 +#define THREAD_START_SP (THREAD_SIZE - 8) + +#ifndef __ASSEMBLY__ + +struct task_struct; +struct exec_domain; + +#include <asm/types.h> + +typedef struct { + unsigned long seg; +} mm_segment_t; + +struct cpu_context_save { + __u32 r4; + __u32 r5; + __u32 r6; + __u32 r7; + __u32 r8; + __u32 r9; + __u32 r10; + __u32 r11; + __u32 r12; + __u32 r13; + __u32 r14; + __u32 r15; + __u32 r16; + __u32 r17; + __u32 r18; + __u32 r19; + __u32 r20; + __u32 r21; + __u32 r22; + __u32 r23; + __u32 r24; + __u32 r25; + __u32 r26; + __u32 fp; + __u32 sp; + __u32 pc; +}; + +/* + * low level task data that entry.S needs immediate access to. + * __switch_to() assumes cpu_context follows immediately after cpu_domain. + */ +struct thread_info { + unsigned long flags; /* low level flags */ + int preempt_count; /* 0 => preemptable */ + /* <0 => bug */ + mm_segment_t addr_limit; /* address limit */ + struct task_struct *task; /* main task structure */ + struct exec_domain *exec_domain; /* execution domain */ + __u32 cpu; /* cpu */ + struct cpu_context_save cpu_context; /* cpu context */ + __u32 syscall; /* syscall number */ + __u8 used_cp[16]; /* thread used copro */ +#ifdef CONFIG_UNICORE_FPU_F64 + struct fp_state fpstate __attribute__((aligned(8))); +#endif + struct restart_block restart_block; +}; + +#define INIT_THREAD_INFO(tsk) \ +{ \ + .task = &tsk, \ + .exec_domain = &default_exec_domain, \ + .flags = 0, \ + .preempt_count = INIT_PREEMPT_COUNT, \ + .addr_limit = KERNEL_DS, \ + .restart_block = { \ + .fn = do_no_restart_syscall, \ + }, \ +} + +#define init_thread_info (init_thread_union.thread_info) +#define init_stack (init_thread_union.stack) + +/* + * how to get the thread information struct from C + */ +static inline struct thread_info *current_thread_info(void) __attribute_const__; + +static inline struct thread_info *current_thread_info(void) +{ + register unsigned long sp asm ("sp"); + return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); +} + +#define thread_saved_pc(tsk) \ + ((unsigned long)(task_thread_info(tsk)->cpu_context.pc)) +#define thread_saved_sp(tsk) \ + ((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) +#define thread_saved_fp(tsk) \ + ((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) + +#endif + +/* + * We use bit 30 of the preempt_count to indicate that kernel + * preemption is occurring. See <asm/hardirq.h>. + */ +#define PREEMPT_ACTIVE 0x40000000 + +/* + * thread information flags: + * TIF_SYSCALL_TRACE - syscall trace active + * TIF_SIGPENDING - signal pending + * TIF_NEED_RESCHED - rescheduling necessary + * TIF_NOTIFY_RESUME - callback before returning to user + */ +#define TIF_SIGPENDING 0 +#define TIF_NEED_RESCHED 1 +#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ +#define TIF_SYSCALL_TRACE 8 +#define TIF_MEMDIE 18 +#define TIF_RESTORE_SIGMASK 20 + +#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) +#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) +#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) +#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) +#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) + +/* + * Change these and you break ASM code in entry-common.S + */ +#define _TIF_WORK_MASK 0x000000ff + +#endif /* __KERNEL__ */ +#endif /* __UNICORE_THREAD_INFO_H__ */ |