projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * include/asm-cris/processor.h | |
| 3 | * | |
| 4 | * Copyright (C) 2000, 2001 Axis Communications AB | |
| 5 | * | |
| 6 | * Authors: Bjorn Wesen Initial version | |
| 7 | * | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef __ASM_CRIS_PROCESSOR_H | |
| 11 | #define __ASM_CRIS_PROCESSOR_H | |
| 12 | ||
| 13 | #include <linux/config.h> | |
| 14 | #include <asm/system.h> | |
| 15 | #include <asm/page.h> | |
| 16 | #include <asm/ptrace.h> | |
| 17 | #include <asm/arch/processor.h> | |
| 18 | ||
| 19 | /* This decides where the kernel will search for a free chunk of vm | |
| 20 | * space during mmap's. | |
| 21 | */ | |
| 22 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) | |
| 23 | ||
| 24 | /* THREAD_SIZE is the size of the task_struct/kernel_stack combo. | |
| 25 | * normally, the stack is found by doing something like p + THREAD_SIZE | |
| 26 | * in CRIS, a page is 8192 bytes, which seems like a sane size | |
| 27 | */ | |
| 28 | ||
| 29 | #define THREAD_SIZE PAGE_SIZE | |
| 30 | #define KERNEL_STACK_SIZE PAGE_SIZE | |
| 31 | ||
| 32 | /* | |
| 33 | * At user->kernel entry, the pt_regs struct is stacked on the top of the kernel-stack. | |
| 34 | * This macro allows us to find those regs for a task. | |
| 35 | * Notice that subsequent pt_regs stackings, like recursive interrupts occurring while | |
| 36 | * we're in the kernel, won't affect this - only the first user->kernel transition | |
| 37 | * registers are reached by this. | |
| 38 | */ | |
| 39 | ||
| 40 | #define user_regs(thread_info) (((struct pt_regs *)((unsigned long)(thread_info) + THREAD_SIZE)) - 1) | |
| 41 | ||
| 42 | /* | |
| 43 | * Dito but for the currently running task | |
| 44 | */ | |
| 45 | ||
| 46 | #define current_regs() user_regs(current->thread_info) | |
| 47 | ||
| 48 | extern inline void prepare_to_copy(struct task_struct *tsk) | |
| 49 | { | |
| 50 | } | |
| 51 | ||
| 52 | extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); | |
| 53 | ||
| 54 | unsigned long get_wchan(struct task_struct *p); | |
| 55 | ||
| 56 | #define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp) | |
| 57 | ||
| 58 | /* | |
| 59 | * Free current thread data structures etc.. | |
| 60 | */ | |
| 61 | ||
| 62 | extern inline void exit_thread(void) | |
| 63 | { | |
| 64 | /* Nothing needs to be done. */ | |
| 65 | } | |
| 66 | ||
| 67 | extern unsigned long thread_saved_pc(struct task_struct *tsk); | |
| 68 | ||
| 69 | /* Free all resources held by a thread. */ | |
| 70 | extern inline void release_thread(struct task_struct *dead_task) | |
| 71 | { | |
| 72 | /* Nothing needs to be done. */ | |
| 73 | } | |
| 74 | ||
| 75 | #define init_stack (init_thread_union.stack) | |
| 76 | ||
| 77 | #define cpu_relax() barrier() | |
| 78 | ||
| 79 | #endif /* __ASM_CRIS_PROCESSOR_H */ |