* This file handles the architecture-dependent parts of process handling.
*/
-#include <linux/config.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/major.h>
#include <linux/stat.h>
+#include <linux/vt.h>
#include <linux/mman.h>
#include <linux/elfcore.h>
#include <linux/reboot.h>
#include "proto.h"
#include "pci_impl.h"
-void default_idle(void)
-{
- barrier();
-}
+/*
+ * Power off function, if any
+ */
+void (*pm_power_off)(void) = machine_power_off;
+EXPORT_SYMBOL(pm_power_off);
void
cpu_idle(void)
{
+ set_thread_flag(TIF_POLLING_NRFLAG);
+
while (1) {
- void (*idle)(void) = default_idle;
/* FIXME -- EV6 and LCA45 know how to power down
the CPU. */
while (!need_resched())
- idle();
+ cpu_relax();
schedule();
}
}
if (cpuid != boot_cpuid) {
flags |= 0x00040000UL; /* "remain halted" */
*pflags = flags;
- clear_bit(cpuid, &cpu_present_mask);
+ cpu_clear(cpuid, cpu_present_map);
halt();
}
#endif
#ifdef CONFIG_SMP
/* Wait for the secondaries to halt. */
- clear_bit(boot_cpuid, &cpu_present_mask);
- while (cpu_present_mask)
+ cpu_clear(boot_cpuid, cpu_present_map);
+ while (cpus_weight(cpu_present_map))
barrier();
#endif
/* If booted from SRM, reset some of the original environment. */
if (alpha_using_srm) {
#ifdef CONFIG_DUMMY_CONSOLE
+ /* If we've gotten here after SysRq-b, leave interrupt
+ context before taking over the console. */
+ if (in_interrupt())
+ irq_exit();
/* This has the effect of resetting the VGA video origin. */
take_over_console(&dummy_con, 0, MAX_NR_CONSOLES-1, 1);
#endif
common_shutdown(LINUX_REBOOT_CMD_RESTART, restart_cmd);
}
-EXPORT_SYMBOL(machine_restart);
void
machine_halt(void)
common_shutdown(LINUX_REBOOT_CMD_HALT, NULL);
}
-EXPORT_SYMBOL(machine_halt);
void
machine_power_off(void)
common_shutdown(LINUX_REBOOT_CMD_POWER_OFF, NULL);
}
-EXPORT_SYMBOL(machine_power_off);
/* Used by sysrq-p, among others. I don't believe r9-r15 are ever
saved in the context it's used. */
void
show_regs(struct pt_regs *regs)
{
- dik_show_regs(regs, 0);
+ dik_show_regs(regs, NULL);
}
/*
regs->ps = 8;
wrusp(sp);
}
+EXPORT_SYMBOL(start_thread);
/*
* Free current thread data structures etc..
* with parameters (SIGCHLD, 0).
*/
int
-alpha_clone(unsigned long clone_flags, unsigned long usp, int *parent_tid,
- int *child_tid, unsigned long tls_value, struct pt_regs *regs)
+alpha_clone(unsigned long clone_flags, unsigned long usp,
+ int __user *parent_tid, int __user *child_tid,
+ unsigned long tls_value, struct pt_regs *regs)
{
if (!usp)
usp = rdusp();
- return do_fork(clone_flags & ~CLONE_IDLETASK, usp, regs, 0,
- parent_tid, child_tid);
+ return do_fork(clone_flags, usp, regs, 0, parent_tid, child_tid);
}
int
{
extern void ret_from_fork(void);
- struct thread_info *childti = p->thread_info;
+ struct thread_info *childti = task_thread_info(p);
struct pt_regs * childregs;
struct switch_stack * childstack, *stack;
unsigned long stack_offset, settls;
if (!(regs->ps & 8))
stack_offset = (PAGE_SIZE-1) & (unsigned long) regs;
childregs = (struct pt_regs *)
- (stack_offset + PAGE_SIZE + (long) childti);
+ (stack_offset + PAGE_SIZE + task_stack_page(p));
*childregs = *regs;
settls = regs->r20;
dump->regs[EF_A2] = pt->r18;
memcpy((char *)dump->regs + EF_SIZE, sw->fp, 32 * 8);
}
+EXPORT_SYMBOL(dump_thread);
/*
* Fill in the user structure for a ELF core dump.
useful value of the thread's UNIQUE field. */
dest[32] = ti->pcb.unique;
}
+EXPORT_SYMBOL(dump_elf_thread);
int
dump_elf_task(elf_greg_t *dest, struct task_struct *task)
{
- struct thread_info *ti;
- struct pt_regs *pt;
-
- ti = task->thread_info;
- pt = (struct pt_regs *)((unsigned long)ti + 2*PAGE_SIZE) - 1;
-
- dump_elf_thread(dest, pt, ti);
-
+ dump_elf_thread(dest, task_pt_regs(task), task_thread_info(task));
return 1;
}
+EXPORT_SYMBOL(dump_elf_task);
int
dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task)
{
- struct thread_info *ti;
- struct pt_regs *pt;
- struct switch_stack *sw;
-
- ti = task->thread_info;
- pt = (struct pt_regs *)((unsigned long)ti + 2*PAGE_SIZE) - 1;
- sw = (struct switch_stack *)pt - 1;
-
+ struct switch_stack *sw = (struct switch_stack *)task_pt_regs(task) - 1;
memcpy(dest, sw->fp, 32 * 8);
-
return 1;
}
+EXPORT_SYMBOL(dump_elf_task_fp);
/*
* sys_execve() executes a new program.
- *
- * This works due to the alpha calling sequence: the first 6 args
- * are gotten from registers, while the rest is on the stack, so
- * we get a0-a5 for free, and then magically find "struct pt_regs"
- * on the stack for us..
- *
- * Don't do this at home.
*/
asmlinkage int
-sys_execve(char *ufilename, char **argv, char **envp,
- unsigned long a3, unsigned long a4, unsigned long a5,
- struct pt_regs regs)
+do_sys_execve(char __user *ufilename, char __user * __user *argv,
+ char __user * __user *envp, struct pt_regs *regs)
{
int error;
char *filename;
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, ®s);
+ error = do_execve(filename, argv, envp, regs);
putname(filename);
out:
return error;
*/
unsigned long
-thread_saved_pc(task_t *t)
+thread_saved_pc(struct task_struct *t)
{
- unsigned long base = (unsigned long)t->thread_info;
- unsigned long fp, sp = t->thread_info->pcb.ksp;
+ unsigned long base = (unsigned long)task_stack_page(t);
+ unsigned long fp, sp = task_thread_info(t)->pcb.ksp;
if (sp > base && sp+6*8 < base + 16*1024) {
fp = ((unsigned long*)sp)[6];
return 0;
}
-/*
- * These bracket the sleeping functions..
- */
-#define first_sched ((unsigned long) scheduling_functions_start_here)
-#define last_sched ((unsigned long) scheduling_functions_end_here)
-
unsigned long
get_wchan(struct task_struct *p)
{
*/
pc = thread_saved_pc(p);
- if (pc >= first_sched && pc < last_sched) {
- schedule_frame = ((unsigned long *)p->thread_info->pcb.ksp)[6];
+ if (in_sched_functions(pc)) {
+ schedule_frame = ((unsigned long *)task_thread_info(p)->pcb.ksp)[6];
return ((unsigned long *)schedule_frame)[12];
}
return pc;
git://git.onelab.eu / linux-2.6.git / blobdiff