diff options
Diffstat (limited to 'arch/h8300/kernel/process.c')
| -rw-r--r-- | arch/h8300/kernel/process.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c deleted file mode 100644 index 97478138e36..00000000000 --- a/arch/h8300/kernel/process.c +++ /dev/null @@ -1,258 +0,0 @@ -/* - * linux/arch/h8300/kernel/process.c - * - * Yoshinori Sato <ysato@users.sourceforge.jp> - * - * Based on: - * - * linux/arch/m68knommu/kernel/process.c - * - * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>, - * Kenneth Albanowski <kjahds@kjahds.com>, - * The Silver Hammer Group, Ltd. - * - * linux/arch/m68k/kernel/process.c - * - * Copyright (C) 1995 Hamish Macdonald - * - * 68060 fixes by Jesper Skov - */ - -/* - * This file handles the architecture-dependent parts of process handling.. - */ - -#include <linux/errno.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/smp_lock.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/user.h> -#include <linux/interrupt.h> -#include <linux/reboot.h> -#include <linux/fs.h> -#include <linux/slab.h> - -#include <asm/uaccess.h> -#include <asm/system.h> -#include <asm/traps.h> -#include <asm/setup.h> -#include <asm/pgtable.h> - -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - -asmlinkage void ret_from_fork(void); - -/* - * The idle loop on an H8/300.. - */ -#if !defined(CONFIG_H8300H_SIM) && !defined(CONFIG_H8S_SIM) -static void default_idle(void) -{ - local_irq_disable(); - if (!need_resched()) { - local_irq_enable(); - /* XXX: race here! What if need_resched() gets set now? */ - __asm__("sleep"); - } else - local_irq_enable(); -} -#else -static void default_idle(void) -{ - cpu_relax(); -} -#endif -void (*idle)(void) = default_idle; - -/* - * 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) -{ - while (1) { - while (!need_resched()) - idle(); - preempt_enable_no_resched(); - schedule(); - preempt_disable(); - } -} - -void machine_restart(char * __unused) -{ - local_irq_disable(); - __asm__("jmp @@0"); -} - -void machine_halt(void) -{ - local_irq_disable(); - __asm__("sleep"); - for (;;); -} - -void machine_power_off(void) -{ - local_irq_disable(); - __asm__("sleep"); - for (;;); -} - -void show_regs(struct pt_regs * regs) -{ - printk("\nPC: %08lx Status: %02x", - regs->pc, regs->ccr); - printk("\nORIG_ER0: %08lx ER0: %08lx ER1: %08lx", - regs->orig_er0, regs->er0, regs->er1); - printk("\nER2: %08lx ER3: %08lx ER4: %08lx ER5: %08lx", - regs->er2, regs->er3, regs->er4, regs->er5); - printk("\nER6' %08lx ",regs->er6); - if (user_mode(regs)) - printk("USP: %08lx\n", rdusp()); - else - printk("\n"); -} - -/* - * Create a kernel thread - */ -int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) -{ - long retval; - long clone_arg; - mm_segment_t fs; - - fs = get_fs(); - set_fs (KERNEL_DS); - clone_arg = flags | CLONE_VM; - __asm__("mov.l sp,er3\n\t" - "sub.l er2,er2\n\t" - "mov.l %2,er1\n\t" - "mov.l %1,er0\n\t" - "trapa #0\n\t" - "cmp.l sp,er3\n\t" - "beq 1f\n\t" - "mov.l %4,er0\n\t" - "mov.l %3,er1\n\t" - "jsr @er1\n\t" - "mov.l %5,er0\n\t" - "trapa #0\n" - "1:\n\t" - "mov.l er0,%0" - :"=r"(retval) - :"i"(__NR_clone),"g"(clone_arg),"g"(fn),"g"(arg),"i"(__NR_exit) - :"er0","er1","er2","er3"); - set_fs (fs); - return retval; -} - -void flush_thread(void) -{ -} - -/* - * "h8300_fork()".. By the time we get here, the - * non-volatile registers have also been saved on the - * stack. We do some ugly pointer stuff here.. (see - * also copy_thread) - */ - -asmlinkage int h8300_fork(struct pt_regs *regs) -{ - return -EINVAL; -} - -asmlinkage int h8300_vfork(struct pt_regs *regs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL); -} - -asmlinkage int h8300_clone(struct pt_regs *regs) -{ - unsigned long clone_flags; - unsigned long newsp; - - /* syscall2 puts clone_flags in er1 and usp in er2 */ - clone_flags = regs->er1; - newsp = regs->er2; - if (!newsp) - newsp = rdusp(); - return do_fork(clone_flags, newsp, regs, 0, NULL, NULL); - -} - -int copy_thread(unsigned long clone_flags, - unsigned long usp, unsigned long topstk, - struct task_struct * p, struct pt_regs * regs) -{ - struct pt_regs * childregs; - - childregs = (struct pt_regs *) (THREAD_SIZE + task_stack_page(p)) - 1; - - *childregs = *regs; - childregs->retpc = (unsigned long) ret_from_fork; - childregs->er0 = 0; - - p->thread.usp = usp; - p->thread.ksp = (unsigned long)childregs; - - return 0; -} - -/* - * sys_execve() executes a new program. - */ -asmlinkage int sys_execve(const char *name, - const char *const *argv, - const char *const *envp, - int dummy, ...) -{ - int error; - char * filename; - struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4); - - filename = getname(name); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - return error; - error = do_execve(filename, argv, envp, regs); - putname(filename); - return error; -} - -unsigned long thread_saved_pc(struct task_struct *tsk) -{ - return ((struct pt_regs *)tsk->thread.esp0)->pc; -} - -unsigned long get_wchan(struct task_struct *p) -{ - unsigned long fp, pc; - unsigned long stack_page; - int count = 0; - if (!p || p == current || p->state == TASK_RUNNING) - return 0; - - stack_page = (unsigned long)p; - fp = ((struct pt_regs *)p->thread.ksp)->er6; - do { - if (fp < stack_page+sizeof(struct thread_info) || - fp >= 8184+stack_page) - return 0; - pc = ((unsigned long *)fp)[1]; - if (!in_sched_functions(pc)) - return pc; - fp = *(unsigned long *) fp; - } while (count++ < 16); - return 0; -} |