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Diffstat (limited to 'arch/cris/arch-v32/kernel/process.c')
| -rw-r--r-- | arch/cris/arch-v32/kernel/process.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/arch/cris/arch-v32/kernel/process.c b/arch/cris/arch-v32/kernel/process.c deleted file mode 100644 index a02f276d0ed4..000000000000 --- a/arch/cris/arch-v32/kernel/process.c +++ /dev/null @@ -1,180 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2000-2003 Axis Communications AB - * - * Authors: Bjorn Wesen (bjornw@axis.com) - * Mikael Starvik (starvik@axis.com) - * Tobias Anderberg (tobiasa@axis.com), CRISv32 port. - * - * 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 <hwregs/reg_rdwr.h> -#include <hwregs/reg_map.h> -#include <hwregs/timer_defs.h> -#include <hwregs/intr_vect_defs.h> -#include <linux/ptrace.h> - -extern void stop_watchdog(void); - -/* We use this if we don't have any better idle routine. */ -void default_idle(void) -{ - local_irq_enable(); - /* Halt until exception. */ - __asm__ volatile("halt"); -} - -/* - * Free current thread data structures etc.. - */ - -extern void deconfigure_bp(long pid); -void exit_thread(struct task_struct *tsk) -{ - deconfigure_bp(tsk->pid); -} - -/* - * If the watchdog is enabled, disable interrupts and enter an infinite loop. - * The watchdog will reset the CPU after 0.1s. If the watchdog isn't enabled - * then enable it and wait. - */ -extern void arch_enable_nmi(void); - -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 -{ - reg_timer_rw_wd_ctrl wd_ctrl = {0}; - - stop_watchdog(); - - wd_ctrl.key = 16; /* Arbitrary key. */ - wd_ctrl.cnt = 1; /* Minimum time. */ - wd_ctrl.cmd = regk_timer_start; - - arch_enable_nmi(); - REG_WR(timer, regi_timer0, rw_wd_ctrl, wd_ctrl); -} -#endif - - while (1) - ; /* Wait for reset. */ -} - -/* - * Setup the child's kernel stack with a pt_regs and call switch_stack() on it. - * It will be unnested 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. - */ - -extern asmlinkage void ret_from_fork(void); -extern 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. Note: 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->ccs = 1 << (I_CCS_BITNR + CCS_SHIFT); - 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. */ - - /* Set a new TLS ? - * The TLS is in $mof because it is the 5th argument to sys_clone. - */ - if (p->mm && (clone_flags & CLONE_SETTLS)) { - task_thread_info(p)->tls = childregs->mof; - } - - /* Put the switch stack right below the pt_regs. */ - - /* Parameter to ret_from_sys_call. 0 is don't restart the syscall. */ - swstack->r9 = 0; - - /* - * We want to return into ret_from_sys_call after the _resume. - * ret_from_fork will call ret_from_sys_call. - */ - swstack->return_ip = (unsigned long) ret_from_fork; - - /* Fix the user-mode and kernel-mode stackpointer. */ - p->thread.usp = usp ?: rdusp(); - p->thread.ksp = (unsigned long) swstack; - - return 0; -} - -unsigned long -get_wchan(struct task_struct *p) -{ - /* TODO */ - 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("ERP: %08lx SRP: %08lx CCS: %08lx USP: %08lx MOF: %08lx\n", - regs->erp, regs->srp, regs->ccs, 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); -} |