summaryrefslogtreecommitdiff
path: root/arch/nds32/kernel/process.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/nds32/kernel/process.c')
-rw-r--r--arch/nds32/kernel/process.c256
1 files changed, 0 insertions, 256 deletions
diff --git a/arch/nds32/kernel/process.c b/arch/nds32/kernel/process.c
deleted file mode 100644
index d35c1f63fa11..000000000000
--- a/arch/nds32/kernel/process.c
+++ /dev/null
@@ -1,256 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task_stack.h>
-#include <linux/delay.h>
-#include <linux/kallsyms.h>
-#include <linux/uaccess.h>
-#include <asm/elf.h>
-#include <asm/proc-fns.h>
-#include <asm/fpu.h>
-#include <linux/ptrace.h>
-#include <linux/reboot.h>
-
-#if IS_ENABLED(CONFIG_LAZY_FPU)
-struct task_struct *last_task_used_math;
-#endif
-
-extern void setup_mm_for_reboot(char mode);
-
-extern inline void arch_reset(char mode)
-{
- if (mode == 's') {
- /* Use cpu handler, jump to 0 */
- cpu_reset(0);
- }
-}
-
-void (*pm_power_off) (void);
-EXPORT_SYMBOL(pm_power_off);
-
-static char reboot_mode_nds32 = 'h';
-
-int __init reboot_setup(char *str)
-{
- reboot_mode_nds32 = str[0];
- return 1;
-}
-
-static int cpub_pwroff(void)
-{
- return 0;
-}
-
-__setup("reboot=", reboot_setup);
-
-void machine_halt(void)
-{
- cpub_pwroff();
-}
-
-EXPORT_SYMBOL(machine_halt);
-
-void machine_power_off(void)
-{
- if (pm_power_off)
- pm_power_off();
-}
-
-EXPORT_SYMBOL(machine_power_off);
-
-void machine_restart(char *cmd)
-{
- /*
- * Clean and disable cache, and turn off interrupts
- */
- cpu_proc_fin();
-
- /*
- * Tell the mm system that we are going to reboot -
- * we may need it to insert some 1:1 mappings so that
- * soft boot works.
- */
- setup_mm_for_reboot(reboot_mode_nds32);
-
- /* Execute kernel restart handler call chain */
- do_kernel_restart(cmd);
-
- /*
- * Now call the architecture specific reboot code.
- */
- arch_reset(reboot_mode_nds32);
-
- /*
- * Whoops - the architecture was unable to reboot.
- * Tell the user!
- */
- mdelay(1000);
- pr_info("Reboot failed -- System halted\n");
- while (1) ;
-}
-
-EXPORT_SYMBOL(machine_restart);
-
-void show_regs(struct pt_regs *regs)
-{
- printk("PC is at %pS\n", (void *)instruction_pointer(regs));
- printk("LP is at %pS\n", (void *)regs->lp);
- pr_info("pc : [<%08lx>] lp : [<%08lx>] %s\n"
- "sp : %08lx fp : %08lx gp : %08lx\n",
- instruction_pointer(regs),
- regs->lp, print_tainted(), regs->sp, regs->fp, regs->gp);
- pr_info("r25: %08lx r24: %08lx\n", regs->uregs[25], regs->uregs[24]);
-
- pr_info("r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n",
- regs->uregs[23], regs->uregs[22],
- regs->uregs[21], regs->uregs[20]);
- pr_info("r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n",
- regs->uregs[19], regs->uregs[18],
- regs->uregs[17], regs->uregs[16]);
- pr_info("r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n",
- regs->uregs[15], regs->uregs[14],
- regs->uregs[13], regs->uregs[12]);
- pr_info("r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n",
- regs->uregs[11], regs->uregs[10],
- regs->uregs[9], regs->uregs[8]);
- pr_info("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
- regs->uregs[7], regs->uregs[6], regs->uregs[5], regs->uregs[4]);
- pr_info("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
- regs->uregs[3], regs->uregs[2], regs->uregs[1], regs->uregs[0]);
- pr_info(" IRQs o%s Segment user\n",
- interrupts_enabled(regs) ? "n" : "ff");
-}
-
-EXPORT_SYMBOL(show_regs);
-
-void exit_thread(struct task_struct *tsk)
-{
-#if defined(CONFIG_FPU) && defined(CONFIG_LAZY_FPU)
- if (last_task_used_math == tsk)
- last_task_used_math = NULL;
-#endif
-}
-
-void flush_thread(void)
-{
-#if defined(CONFIG_FPU)
- clear_fpu(task_pt_regs(current));
- clear_used_math();
-# ifdef CONFIG_LAZY_FPU
- if (last_task_used_math == current)
- last_task_used_math = NULL;
-# endif
-#endif
-}
-
-DEFINE_PER_CPU(struct task_struct *, __entry_task);
-
-asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
-int copy_thread(unsigned long clone_flags, unsigned long stack_start,
- unsigned long stk_sz, struct task_struct *p, unsigned long tls)
-{
- struct pt_regs *childregs = task_pt_regs(p);
-
- memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context));
-
- if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
- memset(childregs, 0, sizeof(struct pt_regs));
- /* kernel thread fn */
- p->thread.cpu_context.r6 = stack_start;
- /* kernel thread argument */
- p->thread.cpu_context.r7 = stk_sz;
- } else {
- *childregs = *current_pt_regs();
- if (stack_start)
- childregs->sp = stack_start;
- /* child get zero as ret. */
- childregs->uregs[0] = 0;
- childregs->osp = 0;
- if (clone_flags & CLONE_SETTLS)
- childregs->uregs[25] = tls;
- }
- /* cpu context switching */
- p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
- p->thread.cpu_context.sp = (unsigned long)childregs;
-
-#if IS_ENABLED(CONFIG_FPU)
- if (used_math()) {
-# if !IS_ENABLED(CONFIG_LAZY_FPU)
- unlazy_fpu(current);
-# else
- preempt_disable();
- if (last_task_used_math == current)
- save_fpu(current);
- preempt_enable();
-# endif
- p->thread.fpu = current->thread.fpu;
- clear_fpu(task_pt_regs(p));
- set_stopped_child_used_math(p);
- }
-#endif
-
-#ifdef CONFIG_HWZOL
- childregs->lb = 0;
- childregs->le = 0;
- childregs->lc = 0;
-#endif
-
- return 0;
-}
-
-#if IS_ENABLED(CONFIG_FPU)
-struct task_struct *_switch_fpu(struct task_struct *prev, struct task_struct *next)
-{
-#if !IS_ENABLED(CONFIG_LAZY_FPU)
- unlazy_fpu(prev);
-#endif
- if (!(next->flags & PF_KTHREAD))
- clear_fpu(task_pt_regs(next));
- return prev;
-}
-#endif
-
-/*
- * fill in the fpe structure for a core dump...
- */
-int dump_fpu(struct pt_regs *regs, elf_fpregset_t * fpu)
-{
- int fpvalid = 0;
-#if IS_ENABLED(CONFIG_FPU)
- struct task_struct *tsk = current;
-
- fpvalid = tsk_used_math(tsk);
- if (fpvalid) {
- lose_fpu();
- memcpy(fpu, &tsk->thread.fpu, sizeof(*fpu));
- }
-#endif
- return fpvalid;
-}
-
-EXPORT_SYMBOL(dump_fpu);
-
-unsigned long __get_wchan(struct task_struct *p)
-{
- unsigned long fp, lr;
- unsigned long stack_start, stack_end;
- int count = 0;
-
- if (IS_ENABLED(CONFIG_FRAME_POINTER)) {
- stack_start = (unsigned long)end_of_stack(p);
- stack_end = (unsigned long)task_stack_page(p) + THREAD_SIZE;
-
- fp = thread_saved_fp(p);
- do {
- if (fp < stack_start || fp > stack_end)
- return 0;
- lr = ((unsigned long *)fp)[0];
- if (!in_sched_functions(lr))
- return lr;
- fp = *(unsigned long *)(fp + 4);
- } while (count++ < 16);
- }
- return 0;
-}
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-28 01:22:59 +0000