diff options
Diffstat (limited to 'arch/cris/kernel/process.c')
| -rw-r--r-- | arch/cris/kernel/process.c | 201 |
1 files changed, 8 insertions, 193 deletions
diff --git a/arch/cris/kernel/process.c b/arch/cris/kernel/process.c index 4ab3e87115b..b78498eb079 100644 --- a/arch/cris/kernel/process.c +++ b/arch/cris/kernel/process.c @@ -1,5 +1,4 @@ -/* $Id: process.c,v 1.21 2005/03/04 08:16:17 starvik Exp $ - * +/* * linux/arch/cris/kernel/process.c * * Copyright (C) 1995 Linus Torvalds @@ -7,118 +6,18 @@ * * Authors: Bjorn Wesen (bjornw@axis.com) * - * $Log: process.c,v $ - * Revision 1.21 2005/03/04 08:16:17 starvik - * Merge of Linux 2.6.11. - * - * Revision 1.20 2005/01/18 05:57:22 starvik - * Renamed hlt_counter to cris_hlt_counter and made it global. - * - * Revision 1.19 2004/10/19 13:07:43 starvik - * Merge of Linux 2.6.9 - * - * Revision 1.18 2004/08/16 12:37:23 starvik - * Merge of Linux 2.6.8 - * - * Revision 1.17 2004/04/05 13:53:48 starvik - * Merge of Linux 2.6.5 - * - * Revision 1.16 2003/10/27 08:04:33 starvik - * Merge of Linux 2.6.0-test9 - * - * Revision 1.15 2003/09/11 07:29:52 starvik - * Merge of Linux 2.6.0-test5 - * - * Revision 1.14 2003/06/10 10:21:12 johana - * Moved thread_saved_pc() from arch/cris/kernel/process.c to - * subarch specific process.c. arch-v32 has an erp, no irp. - * - * Revision 1.13 2003/04/09 05:20:47 starvik - * Merge of Linux 2.5.67 - * - * Revision 1.12 2002/12/11 15:41:11 starvik - * Extracted v10 (ETRAX 100LX) specific stuff to arch/cris/arch-v10/kernel - * - * Revision 1.11 2002/12/10 09:00:10 starvik - * Merge of Linux 2.5.51 - * - * Revision 1.10 2002/11/27 08:42:34 starvik - * Argument to user_regs() is thread_info* - * - * Revision 1.9 2002/11/26 09:44:21 starvik - * New threads exits through ret_from_fork (necessary for preemptive scheduling) - * - * Revision 1.8 2002/11/19 14:35:24 starvik - * Changes from linux 2.4 - * Changed struct initializer syntax to the currently prefered notation - * - * Revision 1.7 2002/11/18 07:39:42 starvik - * thread_saved_pc moved here from processor.h - * - * Revision 1.6 2002/11/14 06:51:27 starvik - * Made cpu_idle more similar with other archs - * init_task_union -> init_thread_union - * Updated for new interrupt macros - * sys_clone and do_fork have a new argument, user_tid - * - * Revision 1.5 2002/11/05 06:45:11 starvik - * Merge of Linux 2.5.45 - * - * Revision 1.4 2002/02/05 15:37:44 bjornw - * Need init_task.h - * - * Revision 1.3 2002/01/21 15:22:49 bjornw - * current->counter is gone - * - * Revision 1.22 2001/11/13 09:40:43 orjanf - * Added dump_fpu (needed for core dumps). - * - * Revision 1.21 2001/11/12 18:26:21 pkj - * Fixed compiler warnings. - * - * Revision 1.20 2001/10/03 08:21:39 jonashg - * cause_of_death does not exist if CONFIG_SVINTO_SIM is defined. - * - * Revision 1.19 2001/09/26 11:52:54 bjornw - * INIT_MMAP is gone in 2.4.10 - * - * Revision 1.18 2001/08/21 21:43:51 hp - * Move last watchdog fix inside #ifdef CONFIG_ETRAX_WATCHDOG - * - * Revision 1.17 2001/08/21 13:48:01 jonashg - * Added fix by HP to avoid oops when doing a hard_reset_now. - * - * Revision 1.16 2001/06/21 02:00:40 hp - * * entry.S: Include asm/unistd.h. - * (_sys_call_table): Use section .rodata, not .data. - * (_kernel_thread): Move from... - * * process.c: ... here. - * * entryoffsets.c (VAL): Break out from... - * (OF): Use VAL. - * (LCLONE_VM): New asmified value from CLONE_VM. - * - * Revision 1.15 2001/06/20 16:31:57 hp - * Add comments to describe empty functions according to review. - * - * Revision 1.14 2001/05/29 11:27:59 markusl - * Fixed so that hard_reset_now will do reset even if watchdog wasn't enabled - * - * Revision 1.13 2001/03/20 19:44:06 bjornw - * Use the 7th syscall argument for regs instead of current_regs - * */ /* * This file handles the architecture-dependent parts of process handling.. */ -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/pgtable.h> #include <asm/uaccess.h> #include <asm/irq.h> #include <linux/module.h> #include <linux/spinlock.h> -#include <linux/fs_struct.h> #include <linux/init_task.h> #include <linux/sched.h> #include <linux/fs.h> @@ -126,102 +25,18 @@ #include <linux/elfcore.h> #include <linux/mqueue.h> #include <linux/reboot.h> +#include <linux/rcupdate.h> //#define DEBUG -/* - * Initial task structure. Make this a per-architecture thing, - * because different architectures tend to have different - * alignment requirements and potentially different initial - * setup. - */ - -static struct fs_struct init_fs = INIT_FS; -static struct files_struct init_files = INIT_FILES; -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); -struct mm_struct init_mm = INIT_MM(init_mm); - -EXPORT_SYMBOL(init_mm); - -/* - * Initial thread structure. - * - * We need to make sure that this is 8192-byte aligned due to the - * way process stacks are handled. This is done by having a special - * "init_task" linker map entry.. - */ -union thread_union init_thread_union - __attribute__((__section__(".data.init_task"))) = - { INIT_THREAD_INFO(init_task) }; - -/* - * Initial task structure. - * - * All other task structs will be allocated on slabs in fork.c - */ -struct task_struct init_task = INIT_TASK(init_task); - -EXPORT_SYMBOL(init_task); - -/* - * The hlt_counter, disable_hlt and enable_hlt is just here as a hook if - * there would ever be a halt sequence (for power save when idle) with - * some largish delay when halting or resuming *and* a driver that can't - * afford that delay. The hlt_counter would then be checked before - * executing the halt sequence, and the driver marks the unhaltable - * region by enable_hlt/disable_hlt. - */ - -int cris_hlt_counter=0; - -void disable_hlt(void) -{ - cris_hlt_counter++; -} - -EXPORT_SYMBOL(disable_hlt); - -void enable_hlt(void) -{ - cris_hlt_counter--; -} - -EXPORT_SYMBOL(enable_hlt); - -/* - * The following aren't currently used. - */ -void (*pm_idle)(void); - extern void default_idle(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 cpu_idle (void) +void (*pm_power_off)(void); +EXPORT_SYMBOL(pm_power_off); + +void arch_cpu_idle(void) { - /* endless idle loop with no priority at all */ - while (1) { - while (!need_resched()) { - void (*idle)(void); - /* - * Mark this as an RCU critical section so that - * synchronize_kernel() in the unload path waits - * for our completion. - */ - idle = pm_idle; - if (!idle) - idle = default_idle; - idle(); - } - preempt_enable_no_resched(); - schedule(); - preempt_disable(); - } + default_idle(); } void hard_reset_now (void); |