diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/score/kernel/process.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/score/kernel/process.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/ANDROID_3.4.5/arch/score/kernel/process.c b/ANDROID_3.4.5/arch/score/kernel/process.c deleted file mode 100644 index 2707023c..00000000 --- a/ANDROID_3.4.5/arch/score/kernel/process.c +++ /dev/null @@ -1,166 +0,0 @@ -/* - * arch/score/kernel/process.c - * - * Score Processor version. - * - * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. - * Chen Liqin <liqin.chen@sunplusct.com> - * Lennox Wu <lennox.wu@sunplusct.com> - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - * 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. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/module.h> -#include <linux/reboot.h> -#include <linux/elfcore.h> -#include <linux/pm.h> - -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - -/* If or when software machine-restart is implemented, add code here. */ -void machine_restart(char *command) {} - -/* If or when software machine-halt is implemented, add code here. */ -void machine_halt(void) {} - -/* If or when software machine-power-off is implemented, add code here. */ -void machine_power_off(void) {} - -/* - * 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 __noreturn cpu_idle(void) -{ - /* endless idle loop with no priority at all */ - while (1) { - while (!need_resched()) - barrier(); - - schedule_preempt_disabled(); - } -} - -void ret_from_fork(void); - -void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp) -{ - unsigned long status; - - /* New thread loses kernel privileges. */ - status = regs->cp0_psr & ~(KU_MASK); - status |= KU_USER; - regs->cp0_psr = status; - regs->cp0_epc = pc; - regs->regs[0] = sp; -} - -void exit_thread(void) {} - -/* - * When a process does an "exec", machine state like FPU and debug - * registers need to be reset. This is a hook function for that. - * Currently we don't have any such state to reset, so this is empty. - */ -void flush_thread(void) {} - -/* - * set up the kernel stack and exception frames for a new process - */ -int copy_thread(unsigned long clone_flags, unsigned long usp, - unsigned long unused, - struct task_struct *p, struct pt_regs *regs) -{ - struct thread_info *ti = task_thread_info(p); - struct pt_regs *childregs = task_pt_regs(p); - - p->set_child_tid = NULL; - p->clear_child_tid = NULL; - - *childregs = *regs; - childregs->regs[7] = 0; /* Clear error flag */ - childregs->regs[4] = 0; /* Child gets zero as return value */ - regs->regs[4] = p->pid; - - if (childregs->cp0_psr & 0x8) { /* test kernel fork or user fork */ - childregs->regs[0] = usp; /* user fork */ - } else { - childregs->regs[28] = (unsigned long) ti; /* kernel fork */ - childregs->regs[0] = (unsigned long) childregs; - } - - p->thread.reg0 = (unsigned long) childregs; - p->thread.reg3 = (unsigned long) ret_from_fork; - p->thread.cp0_psr = 0; - - return 0; -} - -/* Fill in the fpu structure for a core dump. */ -int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r) -{ - return 1; -} - -static void __noreturn -kernel_thread_helper(void *unused0, int (*fn)(void *), - void *arg, void *unused1) -{ - do_exit(fn(arg)); -} - -/* - * Create a kernel thread. - */ -long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) -{ - struct pt_regs regs; - - memset(®s, 0, sizeof(regs)); - - regs.regs[6] = (unsigned long) arg; - regs.regs[5] = (unsigned long) fn; - regs.cp0_epc = (unsigned long) kernel_thread_helper; - regs.cp0_psr = (regs.cp0_psr & ~(0x1|0x4|0x8)) | \ - ((regs.cp0_psr & 0x3) << 2); - - return do_fork(flags | CLONE_VM | CLONE_UNTRACED, \ - 0, ®s, 0, NULL, NULL); -} - -unsigned long thread_saved_pc(struct task_struct *tsk) -{ - return task_pt_regs(tsk)->cp0_epc; -} - -unsigned long get_wchan(struct task_struct *task) -{ - if (!task || task == current || task->state == TASK_RUNNING) - return 0; - - if (!task_stack_page(task)) - return 0; - - return task_pt_regs(task)->cp0_epc; -} - -unsigned long arch_align_stack(unsigned long sp) -{ - return sp; -} |