diff options
Diffstat (limited to 'arch/cris/arch-v10/kernel/process.c')
| -rw-r--r-- | arch/cris/arch-v10/kernel/process.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/arch/cris/arch-v10/kernel/process.c b/arch/cris/arch-v10/kernel/process.c deleted file mode 100644 index 16848b2c61c8..000000000000 --- a/arch/cris/arch-v10/kernel/process.c +++ /dev/null @@ -1,180 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * linux/arch/cris/kernel/process.c - * - * Copyright (C) 1995 Linus Torvalds - * Copyright (C) 2000-2002 Axis Communications AB - * - * Authors: Bjorn Wesen (bjornw@axis.com) - * Mikael Starvik (starvik@axis.com) - * - * This file handles the architecture-dependent parts of process handling.. - */ - -#include <linux/sched.h> -#include <linux/sched/debug.h> -#include <linux/sched/task.h> -#include <linux/sched/task_stack.h> -#include <linux/slab.h> -#include <linux/err.h> -#include <linux/fs.h> -#include <arch/svinto.h> -#include <linux/init.h> -#include <arch/system.h> -#include <linux/ptrace.h> - -#ifdef CONFIG_ETRAX_GPIO -void etrax_gpio_wake_up_check(void); /* drivers/gpio.c */ -#endif - -/* - * We use this if we don't have any better - * idle routine.. - */ -void default_idle(void) -{ -#ifdef CONFIG_ETRAX_GPIO - etrax_gpio_wake_up_check(); -#endif - local_irq_enable(); -} - -/* if the watchdog is enabled, we can simply disable interrupts and go - * into an eternal loop, and the watchdog will reset the CPU after 0.1s - * if on the other hand the watchdog wasn't enabled, we just enable it and wait - */ - -void hard_reset_now (void) -{ - /* - * Don't declare this variable elsewhere. We don't want any other - * code to know about it than the watchdog handler in entry.S and - * this code, implementing hard reset through the watchdog. - */ -#if defined(CONFIG_ETRAX_WATCHDOG) - extern int cause_of_death; -#endif - - printk("*** HARD RESET ***\n"); - local_irq_disable(); - -#if defined(CONFIG_ETRAX_WATCHDOG) - cause_of_death = 0xbedead; -#else - /* Since we dont plan to keep on resetting the watchdog, - the key can be arbitrary hence three */ - *R_WATCHDOG = IO_FIELD(R_WATCHDOG, key, 3) | - IO_STATE(R_WATCHDOG, enable, start); -#endif - - while(1) /* waiting for RETRIBUTION! */ ; -} - -/* setup the child's kernel stack with a pt_regs and switch_stack on it. - * it will be un-nested during _resume and _ret_from_sys_call when the - * new thread is scheduled. - * - * also setup the thread switching structure which is used to keep - * thread-specific data during _resumes. - * - */ -asmlinkage void ret_from_fork(void); -asmlinkage void ret_from_kernel_thread(void); - -int copy_thread(unsigned long clone_flags, unsigned long usp, - unsigned long arg, struct task_struct *p) -{ - struct pt_regs *childregs = task_pt_regs(p); - struct switch_stack *swstack = ((struct switch_stack *)childregs) - 1; - - /* put the pt_regs structure at the end of the new kernel stack page and fix it up - * remember that the task_struct doubles as the kernel stack for the task - */ - - if (unlikely(p->flags & PF_KTHREAD)) { - memset(swstack, 0, - sizeof(struct switch_stack) + sizeof(struct pt_regs)); - swstack->r1 = usp; - swstack->r2 = arg; - childregs->dccr = 1 << I_DCCR_BITNR; - swstack->return_ip = (unsigned long) ret_from_kernel_thread; - p->thread.ksp = (unsigned long) swstack; - p->thread.usp = 0; - return 0; - } - *childregs = *current_pt_regs(); /* struct copy of pt_regs */ - - childregs->r10 = 0; /* child returns 0 after a fork/clone */ - - /* put the switch stack right below the pt_regs */ - - swstack->r9 = 0; /* parameter to ret_from_sys_call, 0 == dont restart the syscall */ - - /* we want to return into ret_from_sys_call after the _resume */ - - swstack->return_ip = (unsigned long) ret_from_fork; /* Will call ret_from_sys_call */ - - /* fix the user-mode stackpointer */ - - p->thread.usp = usp ?: rdusp(); - - /* and the kernel-mode one */ - - p->thread.ksp = (unsigned long) swstack; - -#ifdef DEBUG - printk("copy_thread: new regs at 0x%p, as shown below:\n", childregs); - show_registers(childregs); -#endif - - return 0; -} - -unsigned long get_wchan(struct task_struct *p) -{ -#if 0 - /* YURGH. TODO. */ - - unsigned long ebp, esp, eip; - unsigned long stack_page; - int count = 0; - if (!p || p == current || p->state == TASK_RUNNING) - return 0; - stack_page = (unsigned long)p; - esp = p->thread.esp; - if (!stack_page || esp < stack_page || esp > 8188+stack_page) - return 0; - /* include/asm-i386/system.h:switch_to() pushes ebp last. */ - ebp = *(unsigned long *) esp; - do { - if (ebp < stack_page || ebp > 8184+stack_page) - return 0; - eip = *(unsigned long *) (ebp+4); - if (!in_sched_functions(eip)) - return eip; - ebp = *(unsigned long *) ebp; - } while (count++ < 16); -#endif - return 0; -} -#undef last_sched -#undef first_sched - -void show_regs(struct pt_regs * regs) -{ - unsigned long usp = rdusp(); - - show_regs_print_info(KERN_DEFAULT); - - printk("IRP: %08lx SRP: %08lx DCCR: %08lx USP: %08lx MOF: %08lx\n", - regs->irp, regs->srp, regs->dccr, usp, regs->mof ); - printk(" r0: %08lx r1: %08lx r2: %08lx r3: %08lx\n", - regs->r0, regs->r1, regs->r2, regs->r3); - printk(" r4: %08lx r5: %08lx r6: %08lx r7: %08lx\n", - regs->r4, regs->r5, regs->r6, regs->r7); - printk(" r8: %08lx r9: %08lx r10: %08lx r11: %08lx\n", - regs->r8, regs->r9, regs->r10, regs->r11); - printk("r12: %08lx r13: %08lx oR10: %08lx\n", - regs->r12, regs->r13, regs->orig_r10); -} - |
