diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/mn10300/kernel/process.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/mn10300/kernel/process.c | 319 |
1 files changed, 0 insertions, 319 deletions
diff --git a/ANDROID_3.4.5/arch/mn10300/kernel/process.c b/ANDROID_3.4.5/arch/mn10300/kernel/process.c deleted file mode 100644 index 14707f25..00000000 --- a/ANDROID_3.4.5/arch/mn10300/kernel/process.c +++ /dev/null @@ -1,319 +0,0 @@ -/* MN10300 Process handling code - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/user.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/reboot.h> -#include <linux/percpu.h> -#include <linux/err.h> -#include <linux/fs.h> -#include <linux/slab.h> -#include <asm/uaccess.h> -#include <asm/pgtable.h> -#include <asm/io.h> -#include <asm/processor.h> -#include <asm/mmu_context.h> -#include <asm/fpu.h> -#include <asm/reset-regs.h> -#include <asm/gdb-stub.h> -#include "internal.h" - -/* - * power management idle function, if any.. - */ -void (*pm_idle)(void); -EXPORT_SYMBOL(pm_idle); - -/* - * return saved PC of a blocked thread. - */ -unsigned long thread_saved_pc(struct task_struct *tsk) -{ - return ((unsigned long *) tsk->thread.sp)[3]; -} - -/* - * power off function, if any - */ -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - -#if !defined(CONFIG_SMP) || defined(CONFIG_HOTPLUG_CPU) -/* - * we use this if we don't have any better idle routine - */ -static void default_idle(void) -{ - local_irq_disable(); - if (!need_resched()) - safe_halt(); - else - local_irq_enable(); -} - -#else /* !CONFIG_SMP || CONFIG_HOTPLUG_CPU */ -/* - * On SMP it's slightly faster (but much more power-consuming!) - * to poll the ->work.need_resched flag instead of waiting for the - * cross-CPU IPI to arrive. Use this option with caution. - */ -static inline void poll_idle(void) -{ - int oldval; - - local_irq_enable(); - - /* - * Deal with another CPU just having chosen a thread to - * run here: - */ - oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED); - - if (!oldval) { - set_thread_flag(TIF_POLLING_NRFLAG); - while (!need_resched()) - cpu_relax(); - clear_thread_flag(TIF_POLLING_NRFLAG); - } else { - set_need_resched(); - } -} -#endif /* !CONFIG_SMP || CONFIG_HOTPLUG_CPU */ - -/* - * the idle thread - * - there's no useful work to be done, so just try to conserve power and have - * a low exit latency (ie sit in a loop waiting for somebody to say that - * they'd like to reschedule) - */ -void cpu_idle(void) -{ - /* endless idle loop with no priority at all */ - for (;;) { - while (!need_resched()) { - void (*idle)(void); - - smp_rmb(); - idle = pm_idle; - if (!idle) { -#if defined(CONFIG_SMP) && !defined(CONFIG_HOTPLUG_CPU) - idle = poll_idle; -#else /* CONFIG_SMP && !CONFIG_HOTPLUG_CPU */ - idle = default_idle; -#endif /* CONFIG_SMP && !CONFIG_HOTPLUG_CPU */ - } - idle(); - } - - schedule_preempt_disabled(); - } -} - -void release_segments(struct mm_struct *mm) -{ -} - -void machine_restart(char *cmd) -{ -#ifdef CONFIG_KERNEL_DEBUGGER - gdbstub_exit(0); -#endif - -#ifdef mn10300_unit_hard_reset - mn10300_unit_hard_reset(); -#else - mn10300_proc_hard_reset(); -#endif -} - -void machine_halt(void) -{ -#ifdef CONFIG_KERNEL_DEBUGGER - gdbstub_exit(0); -#endif -} - -void machine_power_off(void) -{ -#ifdef CONFIG_KERNEL_DEBUGGER - gdbstub_exit(0); -#endif -} - -void show_regs(struct pt_regs *regs) -{ -} - -/* - * create a kernel thread - */ -int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) -{ - struct pt_regs regs; - - memset(®s, 0, sizeof(regs)); - - regs.a2 = (unsigned long) fn; - regs.d2 = (unsigned long) arg; - regs.pc = (unsigned long) kernel_thread_helper; - local_save_flags(regs.epsw); - regs.epsw |= EPSW_IE | EPSW_IM_7; - - /* Ok, create the new process.. */ - return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, - NULL, NULL); -} -EXPORT_SYMBOL(kernel_thread); - -/* - * free current thread data structures etc.. - */ -void exit_thread(void) -{ - exit_fpu(); -} - -void flush_thread(void) -{ - flush_fpu(); -} - -void release_thread(struct task_struct *dead_task) -{ -} - -/* - * we do not have to muck with descriptors here, that is - * done in switch_mm() as needed. - */ -void copy_segments(struct task_struct *p, struct mm_struct *new_mm) -{ -} - -/* - * this gets called before we allocate a new thread and copy the current task - * into it so that we can store lazy state into memory - */ -void prepare_to_copy(struct task_struct *tsk) -{ - unlazy_fpu(tsk); -} - -/* - * set up the kernel stack for a new thread and copy arch-specific thread - * control information - */ -int copy_thread(unsigned long clone_flags, - unsigned long c_usp, unsigned long ustk_size, - struct task_struct *p, struct pt_regs *kregs) -{ - struct thread_info *ti = task_thread_info(p); - struct pt_regs *c_uregs, *c_kregs, *uregs; - unsigned long c_ksp; - - uregs = current->thread.uregs; - - c_ksp = (unsigned long) task_stack_page(p) + THREAD_SIZE; - - /* allocate the userspace exception frame and set it up */ - c_ksp -= sizeof(struct pt_regs); - c_uregs = (struct pt_regs *) c_ksp; - - p->thread.uregs = c_uregs; - *c_uregs = *uregs; - c_uregs->sp = c_usp; - c_uregs->epsw &= ~EPSW_FE; /* my FPU */ - - c_ksp -= 12; /* allocate function call ABI slack */ - - /* the new TLS pointer is passed in as arg #5 to sys_clone() */ - if (clone_flags & CLONE_SETTLS) - c_uregs->e2 = current_frame()->d3; - - /* set up the return kernel frame if called from kernel_thread() */ - c_kregs = c_uregs; - if (kregs != uregs) { - c_ksp -= sizeof(struct pt_regs); - c_kregs = (struct pt_regs *) c_ksp; - *c_kregs = *kregs; - c_kregs->sp = c_usp; - c_kregs->next = c_uregs; -#ifdef CONFIG_MN10300_CURRENT_IN_E2 - c_kregs->e2 = (unsigned long) p; /* current */ -#endif - - c_ksp -= 12; /* allocate function call ABI slack */ - } - - /* set up things up so the scheduler can start the new task */ - ti->frame = c_kregs; - p->thread.a3 = (unsigned long) c_kregs; - p->thread.sp = c_ksp; - p->thread.pc = (unsigned long) ret_from_fork; - p->thread.wchan = (unsigned long) ret_from_fork; - p->thread.usp = c_usp; - - return 0; -} - -/* - * clone a process - * - tlsptr is retrieved by copy_thread() from current_frame()->d3 - */ -asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp, - int __user *parent_tidptr, int __user *child_tidptr, - int __user *tlsptr) -{ - return do_fork(clone_flags, newsp ?: current_frame()->sp, - current_frame(), 0, parent_tidptr, child_tidptr); -} - -asmlinkage long sys_fork(void) -{ - return do_fork(SIGCHLD, current_frame()->sp, - current_frame(), 0, NULL, NULL); -} - -asmlinkage long sys_vfork(void) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, current_frame()->sp, - current_frame(), 0, NULL, NULL); -} - -asmlinkage long sys_execve(const char __user *name, - const char __user *const __user *argv, - const char __user *const __user *envp) -{ - char *filename; - int error; - - filename = getname(name); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - return error; - error = do_execve(filename, argv, envp, current_frame()); - putname(filename); - return error; -} - -unsigned long get_wchan(struct task_struct *p) -{ - return p->thread.wchan; -} |