diff options
Diffstat (limited to 'arch/sh/kernel/process_32.c')
| -rw-r--r-- | arch/sh/kernel/process_32.c | 115 |
1 files changed, 32 insertions, 83 deletions
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c index 3326a45749d..ddafbbbab2a 100644 --- a/arch/sh/kernel/process_32.c +++ b/arch/sh/kernel/process_32.c @@ -7,7 +7,11 @@ * * SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima * Copyright (C) 2006 Lineo Solutions Inc. support SH4A UBC - * Copyright (C) 2002 - 2007 Paul Mundt + * Copyright (C) 2002 - 2008 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. */ #include <linux/module.h> #include <linux/mm.h> @@ -26,66 +30,10 @@ #include <asm/system.h> #include <asm/ubc.h> #include <asm/fpu.h> +#include <asm/syscalls.h> -static int hlt_counter; int ubc_usercnt = 0; -void (*pm_idle)(void); -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - -static int __init nohlt_setup(char *__unused) -{ - hlt_counter = 1; - return 1; -} -__setup("nohlt", nohlt_setup); - -static int __init hlt_setup(char *__unused) -{ - hlt_counter = 0; - return 1; -} -__setup("hlt", hlt_setup); - -static void default_idle(void) -{ - if (!hlt_counter) { - clear_thread_flag(TIF_POLLING_NRFLAG); - smp_mb__after_clear_bit(); - set_bl_bit(); - while (!need_resched()) - cpu_sleep(); - clear_bl_bit(); - set_thread_flag(TIF_POLLING_NRFLAG); - } else - while (!need_resched()) - cpu_relax(); -} - -void cpu_idle(void) -{ - set_thread_flag(TIF_POLLING_NRFLAG); - - /* endless idle loop with no priority at all */ - while (1) { - void (*idle)(void) = pm_idle; - - if (!idle) - idle = default_idle; - - tick_nohz_stop_sched_tick(1); - while (!need_resched()) - idle(); - tick_nohz_restart_sched_tick(); - - preempt_enable_no_resched(); - schedule(); - preempt_disable(); - check_pgt_cache(); - } -} - void machine_restart(char * __unused) { /* SR.BL=1 and invoke address error to let CPU reset (manual reset) */ @@ -110,16 +58,22 @@ void machine_power_off(void) void show_regs(struct pt_regs * regs) { printk("\n"); - printk("Pid : %d, Comm: %20s\n", task_pid_nr(current), current->comm); + printk("Pid : %d, Comm: \t\t%s\n", task_pid_nr(current), current->comm); + printk("CPU : %d \t\t%s (%s %.*s)\n\n", + smp_processor_id(), print_tainted(), init_utsname()->release, + (int)strcspn(init_utsname()->version, " "), + init_utsname()->version); + print_symbol("PC is at %s\n", instruction_pointer(regs)); + print_symbol("PR is at %s\n", regs->pr); + printk("PC : %08lx SP : %08lx SR : %08lx ", regs->pc, regs->regs[15], regs->sr); #ifdef CONFIG_MMU - printk("TEA : %08x ", ctrl_inl(MMU_TEA)); + printk("TEA : %08x\n", ctrl_inl(MMU_TEA)); #else - printk(" "); + printk("\n"); #endif - printk("%s\n", print_tainted()); printk("R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n", regs->regs[0],regs->regs[1], @@ -137,31 +91,22 @@ void show_regs(struct pt_regs * regs) regs->mach, regs->macl, regs->gbr, regs->pr); show_trace(NULL, (unsigned long *)regs->regs[15], regs); + show_code(regs); } /* * Create a kernel thread */ - -/* - * This is the mechanism for creating a new kernel thread. - * - */ -extern void kernel_thread_helper(void); -__asm__(".align 5\n" - "kernel_thread_helper:\n\t" - "jsr @r5\n\t" - " nop\n\t" - "mov.l 1f, r1\n\t" - "jsr @r1\n\t" - " mov r0, r4\n\t" - ".align 2\n\t" - "1:.long do_exit"); +ATTRIB_NORET void kernel_thread_helper(void *arg, int (*fn)(void *)) +{ + do_exit(fn(arg)); +} /* Don't use this in BL=1(cli). Or else, CPU resets! */ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) { struct pt_regs regs; + int pid; memset(®s, 0, sizeof(regs)); regs.regs[4] = (unsigned long)arg; @@ -171,8 +116,12 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) regs.sr = (1 << 30); /* Ok, create the new process.. */ - return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, - ®s, 0, NULL, NULL); + pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, + ®s, 0, NULL, NULL); + + trace_mark(kernel_arch_kthread_create, "pid %d fn %p", pid, fn); + + return pid; } /* @@ -210,10 +159,10 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) struct task_struct *tsk = current; fpvalid = !!tsk_used_math(tsk); - if (fpvalid) { - unlazy_fpu(tsk, regs); - memcpy(fpu, &tsk->thread.fpu.hard, sizeof(*fpu)); - } + if (fpvalid) + fpvalid = !fpregs_get(tsk, NULL, 0, + sizeof(struct user_fpu_struct), + fpu, NULL); #endif return fpvalid; |