diff options
Diffstat (limited to 'arch/openrisc/kernel/process.c')
| -rw-r--r-- | arch/openrisc/kernel/process.c | 47 |
1 files changed, 31 insertions, 16 deletions
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c index eb62429681fc..73ffb9fa3118 100644 --- a/arch/openrisc/kernel/process.c +++ b/arch/openrisc/kernel/process.c @@ -14,8 +14,7 @@ */ #define __KERNEL_SYSCALLS__ -#include <stdarg.h> - +#include <linux/cpu.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/sched/debug.h> @@ -37,9 +36,11 @@ #include <linux/reboot.h> #include <linux/uaccess.h> +#include <asm/fpu.h> #include <asm/io.h> #include <asm/processor.h> #include <asm/spr_defs.h> +#include <asm/switch_to.h> #include <linux/smp.h> @@ -54,6 +55,8 @@ void machine_restart(char *cmd) { do_kernel_restart(cmd); + __asm__("l.nop 13"); + /* Give a grace period for failure to restart of 1s */ mdelay(1000); @@ -63,6 +66,16 @@ void machine_restart(char *cmd) } /* + * This is used if a sys-off handler was not set by a power management + * driver, in this case we can assume we are on a simulator. On + * OpenRISC simulators l.nop 1 will trigger the simulator exit. + */ +static void default_power_off(void) +{ + __asm__("l.nop 1"); +} + +/* * Similar to machine_power_off, but don't shut off power. Add code * here to freeze the system for e.g. post-mortem debug purpose when * possible. This halt has nothing to do with the idle halt. @@ -77,7 +90,8 @@ void machine_halt(void) void machine_power_off(void) { printk(KERN_INFO "*** MACHINE POWER OFF ***\n"); - __asm__("l.nop 1"); + do_kernel_power_off(); + default_power_off(); } /* @@ -89,9 +103,10 @@ void arch_cpu_idle(void) raw_local_irq_enable(); if (mfspr(SPR_UPR) & SPR_UPR_PMP) mtspr(SPR_PMR, mfspr(SPR_PMR) | SPR_PMR_DME); + raw_local_irq_disable(); } -void (*pm_power_off) (void) = machine_power_off; +void (*pm_power_off)(void) = NULL; EXPORT_SYMBOL(pm_power_off); /* @@ -105,17 +120,11 @@ void flush_thread(void) void show_regs(struct pt_regs *regs) { - extern void show_registers(struct pt_regs *regs); - show_regs_print_info(KERN_DEFAULT); /* __PHX__ cleanup this mess */ show_registers(regs); } -void release_thread(struct task_struct *dead_task) -{ -} - /* * Copy the thread-specific (arch specific) info from the current * process to the new one p @@ -154,9 +163,11 @@ extern asmlinkage void ret_from_fork(void); */ int -copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg, - struct task_struct *p, unsigned long tls) +copy_thread(struct task_struct *p, const struct kernel_clone_args *args) { + u64 clone_flags = args->flags; + unsigned long usp = args->stack; + unsigned long tls = args->tls; struct pt_regs *userregs; struct pt_regs *kregs; unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE; @@ -174,10 +185,10 @@ copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg, sp -= sizeof(struct pt_regs); kregs = (struct pt_regs *)sp; - if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) { + if (unlikely(args->fn)) { memset(kregs, 0, sizeof(struct pt_regs)); - kregs->gpr[20] = usp; /* fn, kernel thread */ - kregs->gpr[22] = arg; + kregs->gpr[20] = (unsigned long)args->fn; + kregs->gpr[22] = (unsigned long)args->fn_arg; } else { *userregs = *current_pt_regs(); @@ -234,6 +245,8 @@ struct task_struct *__switch_to(struct task_struct *old, local_irq_save(flags); + save_fpu(current); + /* current_set is an array of saved current pointers * (one for each cpu). we need them at user->kernel transition, * while we save them at kernel->user transition @@ -246,6 +259,8 @@ struct task_struct *__switch_to(struct task_struct *old, current_thread_info_set[smp_processor_id()] = new_ti; last = (_switch(old_ti, new_ti))->task; + restore_fpu(current); + local_irq_restore(flags); return last; @@ -265,7 +280,7 @@ void dump_elf_thread(elf_greg_t *dest, struct pt_regs* regs) dest[35] = 0; } -unsigned long get_wchan(struct task_struct *p) +unsigned long __get_wchan(struct task_struct *p) { /* TODO */ |