diff options
Diffstat (limited to 'arch/tile/include/asm/switch_to.h')
-rw-r--r-- | arch/tile/include/asm/switch_to.h | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/arch/tile/include/asm/switch_to.h b/arch/tile/include/asm/switch_to.h deleted file mode 100644 index 34ee72705521..000000000000 --- a/arch/tile/include/asm/switch_to.h +++ /dev/null @@ -1,77 +0,0 @@ -/* - * Copyright 2010 Tilera Corporation. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#ifndef _ASM_TILE_SWITCH_TO_H -#define _ASM_TILE_SWITCH_TO_H - -#include <arch/sim_def.h> - -/* - * switch_to(n) should switch tasks to task nr n, first - * checking that n isn't the current task, in which case it does nothing. - * The number of callee-saved registers saved on the kernel stack - * is defined here for use in copy_thread() and must agree with __switch_to(). - */ -#define CALLEE_SAVED_FIRST_REG 30 -#define CALLEE_SAVED_REGS_COUNT 24 /* r30 to r52, plus an empty to align */ - -#ifndef __ASSEMBLY__ - -struct task_struct; - -/* - * Pause the DMA engine and static network before task switching. - */ -#define prepare_arch_switch(next) _prepare_arch_switch(next) -void _prepare_arch_switch(struct task_struct *next); - -struct task_struct; -#define switch_to(prev, next, last) ((last) = _switch_to((prev), (next))) -extern struct task_struct *_switch_to(struct task_struct *prev, - struct task_struct *next); - -/* Helper function for _switch_to(). */ -extern struct task_struct *__switch_to(struct task_struct *prev, - struct task_struct *next, - unsigned long new_system_save_k_0); - -/* Address that switched-away from tasks are at. */ -extern unsigned long get_switch_to_pc(void); - -/* - * Kernel threads can check to see if they need to migrate their - * stack whenever they return from a context switch; for user - * threads, we defer until they are returning to user-space. - * We defer homecache migration until the runqueue lock is released. - */ -#define finish_arch_post_lock_switch() do { \ - __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_SWITCH | \ - (current->pid << _SIM_CONTROL_OPERATOR_BITS)); \ - if (current->mm == NULL && !kstack_hash && \ - current_thread_info()->homecache_cpu != raw_smp_processor_id()) \ - homecache_migrate_kthread(); \ -} while (0) - -/* Support function for forking a new task. */ -void ret_from_fork(void); - -/* Support function for forking a new kernel thread. */ -void ret_from_kernel_thread(void *fn, void *arg); - -/* Called from ret_from_xxx() when a new process starts up. */ -struct task_struct *sim_notify_fork(struct task_struct *prev); - -#endif /* !__ASSEMBLY__ */ - -#endif /* _ASM_TILE_SWITCH_TO_H */ |