155 lines
3.8 KiB
C
155 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/m32r/kernel/process.c
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*
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* Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata,
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* Hitoshi Yamamoto
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* Taken from sh version.
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* Copyright (C) 1995 Linus Torvalds
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* SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
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*/
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#undef DEBUG_PROCESS
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#ifdef DEBUG_PROCESS
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#define DPRINTK(fmt, args...) printk("%s:%d:%s: " fmt, __FILE__, __LINE__, \
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__func__, ##args)
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#else
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#define DPRINTK(fmt, args...)
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#endif
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/*
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* This file handles the architecture-dependent parts of process handling..
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*/
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/sched/debug.h>
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#include <linux/sched/task.h>
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#include <linux/sched/task_stack.h>
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#include <linux/module.h>
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#include <linux/ptrace.h>
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#include <linux/unistd.h>
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#include <linux/hardirq.h>
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#include <linux/rcupdate.h>
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#include <asm/io.h>
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#include <linux/uaccess.h>
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#include <asm/mmu_context.h>
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#include <asm/elf.h>
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#include <asm/m32r.h>
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#include <linux/err.h>
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void (*pm_power_off)(void) = NULL;
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EXPORT_SYMBOL(pm_power_off);
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void machine_restart(char *__unused)
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{
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#if defined(CONFIG_PLAT_MAPPI3)
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outw(1, (unsigned long)PLD_REBOOT);
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#endif
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printk("Please push reset button!\n");
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while (1)
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cpu_relax();
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}
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void machine_halt(void)
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{
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printk("Please push reset button!\n");
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while (1)
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cpu_relax();
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}
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void machine_power_off(void)
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{
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/* M32R_FIXME */
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}
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void show_regs(struct pt_regs * regs)
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{
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printk("\n");
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show_regs_print_info(KERN_DEFAULT);
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printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \
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regs->bpc, regs->psw, regs->lr, regs->fp);
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printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \
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regs->bbpc, regs->bbpsw, regs->spu, regs->spi);
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printk("R0 [%08lx]:R1 [%08lx]:R2 [%08lx]:R3 [%08lx]\n", \
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regs->r0, regs->r1, regs->r2, regs->r3);
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printk("R4 [%08lx]:R5 [%08lx]:R6 [%08lx]:R7 [%08lx]\n", \
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regs->r4, regs->r5, regs->r6, regs->r7);
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printk("R8 [%08lx]:R9 [%08lx]:R10[%08lx]:R11[%08lx]\n", \
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regs->r8, regs->r9, regs->r10, regs->r11);
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printk("R12[%08lx]\n", \
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regs->r12);
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#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
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printk("ACC0H[%08lx]:ACC0L[%08lx]\n", \
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regs->acc0h, regs->acc0l);
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printk("ACC1H[%08lx]:ACC1L[%08lx]\n", \
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regs->acc1h, regs->acc1l);
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#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
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printk("ACCH[%08lx]:ACCL[%08lx]\n", \
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regs->acc0h, regs->acc0l);
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#else
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#error unknown isa configuration
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#endif
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}
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void flush_thread(void)
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{
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DPRINTK("pid = %d\n", current->pid);
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memset(¤t->thread.debug_trap, 0, sizeof(struct debug_trap));
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}
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void release_thread(struct task_struct *dead_task)
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{
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/* do nothing */
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DPRINTK("pid = %d\n", dead_task->pid);
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}
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/* Fill in the fpu structure for a core dump.. */
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int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
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{
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return 0; /* Task didn't use the fpu at all. */
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}
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int copy_thread(unsigned long clone_flags, unsigned long spu,
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unsigned long arg, struct task_struct *tsk)
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{
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struct pt_regs *childregs = task_pt_regs(tsk);
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extern void ret_from_fork(void);
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extern void ret_from_kernel_thread(void);
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if (unlikely(tsk->flags & PF_KTHREAD)) {
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memset(childregs, 0, sizeof(struct pt_regs));
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childregs->psw = M32R_PSW_BIE;
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childregs->r1 = spu; /* fn */
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childregs->r0 = arg;
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tsk->thread.lr = (unsigned long)ret_from_kernel_thread;
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} else {
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/* Copy registers */
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*childregs = *current_pt_regs();
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if (spu)
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childregs->spu = spu;
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childregs->r0 = 0; /* Child gets zero as return value */
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tsk->thread.lr = (unsigned long)ret_from_fork;
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}
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tsk->thread.sp = (unsigned long)childregs;
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return 0;
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}
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/*
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* These bracket the sleeping functions..
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*/
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#define first_sched ((unsigned long) scheduling_functions_start_here)
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#define last_sched ((unsigned long) scheduling_functions_end_here)
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unsigned long get_wchan(struct task_struct *p)
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{
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/* M32R_FIXME */
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return (0);
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}
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