2 * linux/arch/m32r/kernel/process.c
4 * Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata,
6 * Taken from sh version.
7 * Copyright (C) 1995 Linus Torvalds
8 * SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
13 #define DPRINTK(fmt, args...) printk("%s:%d:%s: " fmt, __FILE__, __LINE__, \
16 #define DPRINTK(fmt, args...)
20 * This file handles the architecture-dependent parts of process handling..
24 #include <linux/slab.h>
25 #include <linux/sched/debug.h>
26 #include <linux/sched/task.h>
27 #include <linux/sched/task_stack.h>
28 #include <linux/module.h>
29 #include <linux/ptrace.h>
30 #include <linux/unistd.h>
31 #include <linux/hardirq.h>
32 #include <linux/rcupdate.h>
35 #include <linux/uaccess.h>
36 #include <asm/mmu_context.h>
40 #include <linux/err.h>
43 * Return saved PC of a blocked thread.
45 unsigned long thread_saved_pc(struct task_struct *tsk)
47 return tsk->thread.lr;
50 void (*pm_power_off)(void) = NULL;
51 EXPORT_SYMBOL(pm_power_off);
53 void machine_restart(char *__unused)
55 #if defined(CONFIG_PLAT_MAPPI3)
56 outw(1, (unsigned long)PLD_REBOOT);
59 printk("Please push reset button!\n");
64 void machine_halt(void)
66 printk("Please push reset button!\n");
71 void machine_power_off(void)
76 void show_regs(struct pt_regs * regs)
79 show_regs_print_info(KERN_DEFAULT);
81 printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \
82 regs->bpc, regs->psw, regs->lr, regs->fp);
83 printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \
84 regs->bbpc, regs->bbpsw, regs->spu, regs->spi);
85 printk("R0 [%08lx]:R1 [%08lx]:R2 [%08lx]:R3 [%08lx]\n", \
86 regs->r0, regs->r1, regs->r2, regs->r3);
87 printk("R4 [%08lx]:R5 [%08lx]:R6 [%08lx]:R7 [%08lx]\n", \
88 regs->r4, regs->r5, regs->r6, regs->r7);
89 printk("R8 [%08lx]:R9 [%08lx]:R10[%08lx]:R11[%08lx]\n", \
90 regs->r8, regs->r9, regs->r10, regs->r11);
91 printk("R12[%08lx]\n", \
94 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
95 printk("ACC0H[%08lx]:ACC0L[%08lx]\n", \
96 regs->acc0h, regs->acc0l);
97 printk("ACC1H[%08lx]:ACC1L[%08lx]\n", \
98 regs->acc1h, regs->acc1l);
99 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
100 printk("ACCH[%08lx]:ACCL[%08lx]\n", \
101 regs->acc0h, regs->acc0l);
103 #error unknown isa configuration
107 void flush_thread(void)
109 DPRINTK("pid = %d\n", current->pid);
110 memset(¤t->thread.debug_trap, 0, sizeof(struct debug_trap));
113 void release_thread(struct task_struct *dead_task)
116 DPRINTK("pid = %d\n", dead_task->pid);
119 /* Fill in the fpu structure for a core dump.. */
120 int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
122 return 0; /* Task didn't use the fpu at all. */
125 int copy_thread(unsigned long clone_flags, unsigned long spu,
126 unsigned long arg, struct task_struct *tsk)
128 struct pt_regs *childregs = task_pt_regs(tsk);
129 extern void ret_from_fork(void);
130 extern void ret_from_kernel_thread(void);
132 if (unlikely(tsk->flags & PF_KTHREAD)) {
133 memset(childregs, 0, sizeof(struct pt_regs));
134 childregs->psw = M32R_PSW_BIE;
135 childregs->r1 = spu; /* fn */
137 tsk->thread.lr = (unsigned long)ret_from_kernel_thread;
140 *childregs = *current_pt_regs();
142 childregs->spu = spu;
143 childregs->r0 = 0; /* Child gets zero as return value */
144 tsk->thread.lr = (unsigned long)ret_from_fork;
146 tsk->thread.sp = (unsigned long)childregs;
152 * These bracket the sleeping functions..
154 #define first_sched ((unsigned long) scheduling_functions_start_here)
155 #define last_sched ((unsigned long) scheduling_functions_end_here)
157 unsigned long get_wchan(struct task_struct *p)