* Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
* Copyright (C) 2000 Philipp Rumpf <prumpf with tux.org>
* Copyright (C) 2000 David Kennedy <dkennedy with linuxcare.com>
- * Copyright (C) 2000 Richard Hirst <rhirst with parisc-lixux.org>
+ * Copyright (C) 2000 Richard Hirst <rhirst with parisc-linux.org>
* Copyright (C) 2000 Grant Grundler <grundler with parisc-linux.org>
* Copyright (C) 2001 Alan Modra <amodra at parisc-linux.org>
* Copyright (C) 2001-2002 Ryan Bradetich <rbrad at parisc-linux.org>
- * Copyright (C) 2001-2002 Helge Deller <deller at parisc-linux.org>
+ * Copyright (C) 2001-2007 Helge Deller <deller at parisc-linux.org>
* Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
*
*
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <linux/fs.h>
#include <linux/module.h>
#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/kallsyms.h>
+#include <linux/uaccess.h>
#include <asm/io.h>
-#include <asm/offsets.h>
+#include <asm/asm-offsets.h>
#include <asm/pdc.h>
#include <asm/pdc_chassis.h>
#include <asm/pgalloc.h>
-#include <asm/uaccess.h>
#include <asm/unwind.h>
-
-static int hlt_counter;
-
-/*
- * Power off function, if any
- */
-void (*pm_power_off)(void);
-
-void disable_hlt(void)
-{
- hlt_counter++;
-}
-
-EXPORT_SYMBOL(disable_hlt);
-
-void enable_hlt(void)
-{
- hlt_counter--;
-}
-
-EXPORT_SYMBOL(enable_hlt);
-
-void default_idle(void)
-{
- barrier();
-}
+#include <asm/sections.h>
/*
* The idle thread. There's no useful work to be
*/
void cpu_idle(void)
{
+ set_thread_flag(TIF_POLLING_NRFLAG);
+
/* endless idle loop with no priority at all */
while (1) {
while (!need_resched())
barrier();
+ preempt_enable_no_resched();
schedule();
+ preempt_disable();
check_pgt_cache();
}
}
-#ifdef __LP64__
-#define COMMAND_GLOBAL 0xfffffffffffe0030UL
-#else
-#define COMMAND_GLOBAL 0xfffe0030
-#endif
-
+#define COMMAND_GLOBAL F_EXTEND(0xfffe0030)
#define CMD_RESET 5 /* reset any module */
/*
*/
}
+void (*chassis_power_off)(void);
/*
* This routine is called from sys_reboot to actually turn off the
void machine_power_off(void)
{
/* If there is a registered power off handler, call it. */
- if(pm_power_off)
- pm_power_off();
+ if (chassis_power_off)
+ chassis_power_off();
/* Put the soft power button back under hardware control.
* If the user had already pressed the power button, the
* software. The user has to press the button himself. */
printk(KERN_EMERG "System shut down completed.\n"
- KERN_EMERG "Please power this system off now.");
+ "Please power this system off now.");
}
+void (*pm_power_off)(void) = machine_power_off;
+EXPORT_SYMBOL(pm_power_off);
/*
* Create a kernel thread
sys_clone(unsigned long clone_flags, unsigned long usp,
struct pt_regs *regs)
{
- int __user *user_tid = (int __user *)regs->gr[26];
+ /* Arugments from userspace are:
+ r26 = Clone flags.
+ r25 = Child stack.
+ r24 = parent_tidptr.
+ r23 = Is the TLS storage descriptor
+ r22 = child_tidptr
+
+ However, these last 3 args are only examined
+ if the proper flags are set. */
+ int __user *parent_tidptr = (int __user *)regs->gr[24];
+ int __user *child_tidptr = (int __user *)regs->gr[22];
/* usp must be word aligned. This also prevents users from
* passing in the value 1 (which is the signal for a special
usp = ALIGN(usp, 4);
/* A zero value for usp means use the current stack */
- if(usp == 0)
- usp = regs->gr[30];
+ if (usp == 0)
+ usp = regs->gr[30];
- return do_fork(clone_flags, usp, regs, 0, user_tid, NULL);
+ return do_fork(clone_flags, usp, regs, 0, parent_tidptr, child_tidptr);
}
int
}
int
-copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
+copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long unused, /* in ia64 this is "user_stack_size" */
struct task_struct * p, struct pt_regs * pregs)
{
struct pt_regs * cregs = &(p->thread.regs);
- struct thread_info *ti = p->thread_info;
+ void *stack = task_stack_page(p);
/* We have to use void * instead of a function pointer, because
* function pointers aren't a pointer to the function on 64-bit.
*/
if (usp == 1) {
/* kernel thread */
- cregs->ksp = (((unsigned long)(ti)) + THREAD_SZ_ALGN);
+ cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN;
/* Must exit via ret_from_kernel_thread in order
* to call schedule_tail()
*/
* Copy function and argument to be called from
* ret_from_kernel_thread.
*/
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
cregs->gr[27] = pregs->gr[27];
#endif
cregs->gr[26] = pregs->gr[26];
*/
/* Use same stack depth as parent */
- cregs->ksp = ((unsigned long)(ti))
+ cregs->ksp = (unsigned long)stack
+ (pregs->gr[21] & (THREAD_SIZE - 1));
cregs->gr[30] = usp;
if (p->personality == PER_HPUX) {
} else {
cregs->kpc = (unsigned long) &child_return;
}
+ /* Setup thread TLS area from the 4th parameter in clone */
+ if (clone_flags & CLONE_SETTLS)
+ cregs->cr27 = pregs->gr[23];
+
}
return 0;
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, (char __user **) regs->gr[25],
- (char __user **) regs->gr[24], regs);
- if (error == 0) {
- task_lock(current);
- current->ptrace &= ~PT_DTRACE;
- task_unlock(current);
- }
+ error = do_execve(filename, (char __user * __user *) regs->gr[25],
+ (char __user * __user *) regs->gr[24], regs);
putname(filename);
out:
return error;
}
-unsigned long
+extern int __execve(const char *filename, char *const argv[],
+ char *const envp[], struct task_struct *task);
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+ return __execve(filename, argv, envp, current);
+}
+
+unsigned long
get_wchan(struct task_struct *p)
{
struct unwind_frame_info info;
unsigned long ip;
int count = 0;
+
+ if (!p || p == current || p->state == TASK_RUNNING)
+ return 0;
+
/*
* These bracket the sleeping functions..
*/
} while (count++ < 16);
return 0;
}
+
+#ifdef CONFIG_64BIT
+void *dereference_function_descriptor(void *ptr)
+{
+ Elf64_Fdesc *desc = ptr;
+ void *p;
+
+ if (!probe_kernel_address(&desc->addr, p))
+ ptr = p;
+ return ptr;
+}
+#endif