diff options
Diffstat (limited to 'arch/m32r/kernel')
| -rw-r--r-- | arch/m32r/kernel/entry.S | 9 | ||||
| -rw-r--r-- | arch/m32r/kernel/m32r_ksyms.c | 1 | ||||
| -rw-r--r-- | arch/m32r/kernel/process.c | 177 | ||||
| -rw-r--r-- | arch/m32r/kernel/signal.c | 16 | ||||
| -rw-r--r-- | arch/m32r/kernel/smpboot.c | 2 | ||||
| -rw-r--r-- | arch/m32r/kernel/sys_m32r.c | 21 | ||||
| -rw-r--r-- | arch/m32r/kernel/time.c | 4 |
7 files changed, 34 insertions, 196 deletions
diff --git a/arch/m32r/kernel/entry.S b/arch/m32r/kernel/entry.S index 225412bc227e..0c01543f10cd 100644 --- a/arch/m32r/kernel/entry.S +++ b/arch/m32r/kernel/entry.S @@ -125,6 +125,15 @@ and \reg, sp .endm +ENTRY(ret_from_kernel_thread) + pop r0 + bl schedule_tail + GET_THREAD_INFO(r8) + ld r0, R0(r8) + ld r1, R1(r8) + jl r1 + bra syscall_exit + ENTRY(ret_from_fork) pop r0 bl schedule_tail diff --git a/arch/m32r/kernel/m32r_ksyms.c b/arch/m32r/kernel/m32r_ksyms.c index 700570747a90..b727e693c805 100644 --- a/arch/m32r/kernel/m32r_ksyms.c +++ b/arch/m32r/kernel/m32r_ksyms.c @@ -21,7 +21,6 @@ EXPORT_SYMBOL(boot_cpu_data); EXPORT_SYMBOL(dump_fpu); EXPORT_SYMBOL(__ioremap); EXPORT_SYMBOL(iounmap); -EXPORT_SYMBOL(kernel_thread); EXPORT_SYMBOL(strncpy_from_user); EXPORT_SYMBOL(__strncpy_from_user); diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c index e7366276ef30..bde899e155d3 100644 --- a/arch/m32r/kernel/process.c +++ b/arch/m32r/kernel/process.c @@ -44,36 +44,10 @@ unsigned long thread_saved_pc(struct task_struct *tsk) return tsk->thread.lr; } -/* - * Powermanagement idle function, if any.. - */ -static void (*pm_idle)(void) = NULL; - void (*pm_power_off)(void) = NULL; EXPORT_SYMBOL(pm_power_off); /* - * We use this is we don't have any better - * idle routine.. - */ -static void default_idle(void) -{ - /* M32R_FIXME: Please use "cpu_sleep" mode. */ - cpu_relax(); -} - -/* - * On SMP it's slightly faster (but much more power-consuming!) - * to poll the ->work.need_resched flag instead of waiting for the - * cross-CPU IPI to arrive. Use this option with caution. - */ -static void poll_idle (void) -{ - /* M32R_FIXME */ - cpu_relax(); -} - -/* * 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 @@ -84,14 +58,8 @@ void cpu_idle (void) /* endless idle loop with no priority at all */ while (1) { rcu_idle_enter(); - while (!need_resched()) { - void (*idle)(void) = pm_idle; - - if (!idle) - idle = default_idle; - - idle(); - } + while (!need_resched()) + cpu_relax(); rcu_idle_exit(); schedule_preempt_disabled(); } @@ -120,21 +88,6 @@ void machine_power_off(void) /* M32R_FIXME */ } -static int __init idle_setup (char *str) -{ - if (!strncmp(str, "poll", 4)) { - printk("using poll in idle threads.\n"); - pm_idle = poll_idle; - } else if (!strncmp(str, "sleep", 4)) { - printk("using sleep in idle threads.\n"); - pm_idle = default_idle; - } - - return 1; -} - -__setup("idle=", idle_setup); - void show_regs(struct pt_regs * regs) { printk("\n"); @@ -165,41 +118,6 @@ void show_regs(struct pt_regs * regs) } /* - * Create a kernel thread - */ - -/* - * This is the mechanism for creating a new kernel thread. - * - * NOTE! Only a kernel-only process(ie the swapper or direct descendants - * who haven't done an "execve()") should use this: it will work within - * a system call from a "real" process, but the process memory space will - * not be free'd until both the parent and the child have exited. - */ -static void kernel_thread_helper(void *nouse, int (*fn)(void *), void *arg) -{ - fn(arg); - do_exit(-1); -} - -int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) -{ - struct pt_regs regs; - - memset(®s, 0, sizeof (regs)); - regs.r1 = (unsigned long)fn; - regs.r2 = (unsigned long)arg; - - regs.bpc = (unsigned long)kernel_thread_helper; - - regs.psw = M32R_PSW_BIE; - - /* Ok, create the new process. */ - return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, - NULL); -} - -/* * Free current thread data structures etc.. */ void exit_thread(void) @@ -227,88 +145,31 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) } int copy_thread(unsigned long clone_flags, unsigned long spu, - unsigned long unused, struct task_struct *tsk, struct pt_regs *regs) + unsigned long arg, struct task_struct *tsk) { struct pt_regs *childregs = task_pt_regs(tsk); extern void ret_from_fork(void); - - /* Copy registers */ - *childregs = *regs; - - childregs->spu = spu; - childregs->r0 = 0; /* Child gets zero as return value */ - regs->r0 = tsk->pid; + extern void ret_from_kernel_thread(void); + + if (unlikely(tsk->flags & PF_KTHREAD)) { + memset(childregs, 0, sizeof(struct pt_regs)); + childregs->psw = M32R_PSW_BIE; + childregs->r1 = spu; /* fn */ + childregs->r0 = arg; + tsk->thread.lr = (unsigned long)ret_from_kernel_thread; + } else { + /* Copy registers */ + *childregs = *current_pt_regs(); + if (spu) + childregs->spu = spu; + childregs->r0 = 0; /* Child gets zero as return value */ + tsk->thread.lr = (unsigned long)ret_from_fork; + } tsk->thread.sp = (unsigned long)childregs; - tsk->thread.lr = (unsigned long)ret_from_fork; return 0; } -asmlinkage int sys_fork(unsigned long r0, unsigned long r1, unsigned long r2, - unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, - struct pt_regs regs) -{ -#ifdef CONFIG_MMU - return do_fork(SIGCHLD, regs.spu, ®s, 0, NULL, NULL); -#else - return -EINVAL; -#endif /* CONFIG_MMU */ -} - -asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, - unsigned long parent_tidptr, - unsigned long child_tidptr, - unsigned long r4, unsigned long r5, unsigned long r6, - struct pt_regs regs) -{ - if (!newsp) - newsp = regs.spu; - - return do_fork(clone_flags, newsp, ®s, 0, - (int __user *)parent_tidptr, (int __user *)child_tidptr); -} - -/* - * This is trivial, and on the face of it looks like it - * could equally well be done in user mode. - * - * Not so, for quite unobvious reasons - register pressure. - * In user mode vfork() cannot have a stack frame, and if - * done by calling the "clone()" system call directly, you - * do not have enough call-clobbered registers to hold all - * the information you need. - */ -asmlinkage int sys_vfork(unsigned long r0, unsigned long r1, unsigned long r2, - unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, - struct pt_regs regs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.spu, ®s, 0, - NULL, NULL); -} - -/* - * sys_execve() executes a new program. - */ -asmlinkage int sys_execve(const char __user *ufilename, - const char __user *const __user *uargv, - const char __user *const __user *uenvp, - unsigned long r3, unsigned long r4, unsigned long r5, - unsigned long r6, struct pt_regs regs) -{ - int error; - struct filename *filename; - - filename = getname(ufilename); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - goto out; - - error = do_execve(filename->name, uargv, uenvp, ®s); - putname(filename); -out: - return error; -} - /* * These bracket the sleeping functions.. */ diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c index 6e3c26a1607c..d503568cb753 100644 --- a/arch/m32r/kernel/signal.c +++ b/arch/m32r/kernel/signal.c @@ -27,15 +27,6 @@ #define DEBUG_SIG 0 -asmlinkage int -sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, - unsigned long r2, unsigned long r3, unsigned long r4, - unsigned long r5, unsigned long r6, struct pt_regs *regs) -{ - return do_sigaltstack(uss, uoss, regs->spu); -} - - /* * Do a signal return; undo the signal stack. */ @@ -113,7 +104,7 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1, if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result)) goto badframe; - if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->spu) == -EFAULT) + if (restore_altstack(&frame->uc.uc_stack)) goto badframe; return result; @@ -213,10 +204,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); err |= __put_user(0, &frame->uc.uc_link); - err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->spu), - &frame->uc.uc_stack.ss_flags); - err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); + err |= __save_altstack(&frame->uc.uc_stack, regs->spu); err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) diff --git a/arch/m32r/kernel/smpboot.c b/arch/m32r/kernel/smpboot.c index a2cfc0abb05c..13168a769f8f 100644 --- a/arch/m32r/kernel/smpboot.c +++ b/arch/m32r/kernel/smpboot.c @@ -127,7 +127,7 @@ static void unmap_cpu_to_physid(int, int); /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ /* Boot up APs Routines : BSP */ /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/ -void __devinit smp_prepare_boot_cpu(void) +void smp_prepare_boot_cpu(void) { bsp_phys_id = hard_smp_processor_id(); physid_set(bsp_phys_id, phys_cpu_present_map); diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c index d841fb6cc703..c3fdd632fba7 100644 --- a/arch/m32r/kernel/sys_m32r.c +++ b/arch/m32r/kernel/sys_m32r.c @@ -88,24 +88,3 @@ asmlinkage int sys_cachectl(char *addr, int nbytes, int op) /* Not implemented yet. */ return -ENOSYS; } - -/* - * Do a system call from kernel instead of calling sys_execve so we - * end up with proper pt_regs. - */ -int kernel_execve(const char *filename, - const char *const argv[], - const char *const envp[]) -{ - register long __scno __asm__ ("r7") = __NR_execve; - register long __arg3 __asm__ ("r2") = (long)(envp); - register long __arg2 __asm__ ("r1") = (long)(argv); - register long __res __asm__ ("r0") = (long)(filename); - __asm__ __volatile__ ( - "trap #" SYSCALL_VECTOR "|| nop" - : "=r" (__res) - : "r" (__scno), "0" (__res), "r" (__arg2), - "r" (__arg3) - : "memory"); - return __res; -} diff --git a/arch/m32r/kernel/time.c b/arch/m32r/kernel/time.c index 84dd04048db9..1a15f81ea1bd 100644 --- a/arch/m32r/kernel/time.c +++ b/arch/m32r/kernel/time.c @@ -57,7 +57,7 @@ extern void smp_local_timer_interrupt(void); static unsigned long latch; -u32 arch_gettimeoffset(void) +static u32 m32r_gettimeoffset(void) { unsigned long elapsed_time = 0; /* [us] */ @@ -165,6 +165,8 @@ void read_persistent_clock(struct timespec *ts) void __init time_init(void) { + arch_gettimeoffset = m32r_gettimeoffset; + #if defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_XNUX2) \ || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_M32700) \ || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104) |