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/module.h>
26 #include <linux/ptrace.h>
27 #include <linux/unistd.h>
28 #include <linux/hardirq.h>
29 #include <linux/rcupdate.h>
32 #include <asm/uaccess.h>
33 #include <asm/mmu_context.h>
37 #include <linux/err.h>
40 * Return saved PC of a blocked thread.
42 unsigned long thread_saved_pc(struct task_struct
*tsk
)
44 return tsk
->thread
.lr
;
47 void (*pm_power_off
)(void) = NULL
;
48 EXPORT_SYMBOL(pm_power_off
);
50 void machine_restart(char *__unused
)
52 #if defined(CONFIG_PLAT_MAPPI3)
53 outw(1, (unsigned long)PLD_REBOOT
);
56 printk("Please push reset button!\n");
61 void machine_halt(void)
63 printk("Please push reset button!\n");
68 void machine_power_off(void)
73 void show_regs(struct pt_regs
* regs
)
76 printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \
77 regs
->bpc
, regs
->psw
, regs
->lr
, regs
->fp
);
78 printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \
79 regs
->bbpc
, regs
->bbpsw
, regs
->spu
, regs
->spi
);
80 printk("R0 [%08lx]:R1 [%08lx]:R2 [%08lx]:R3 [%08lx]\n", \
81 regs
->r0
, regs
->r1
, regs
->r2
, regs
->r3
);
82 printk("R4 [%08lx]:R5 [%08lx]:R6 [%08lx]:R7 [%08lx]\n", \
83 regs
->r4
, regs
->r5
, regs
->r6
, regs
->r7
);
84 printk("R8 [%08lx]:R9 [%08lx]:R10[%08lx]:R11[%08lx]\n", \
85 regs
->r8
, regs
->r9
, regs
->r10
, regs
->r11
);
86 printk("R12[%08lx]\n", \
89 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
90 printk("ACC0H[%08lx]:ACC0L[%08lx]\n", \
91 regs
->acc0h
, regs
->acc0l
);
92 printk("ACC1H[%08lx]:ACC1L[%08lx]\n", \
93 regs
->acc1h
, regs
->acc1l
);
94 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
95 printk("ACCH[%08lx]:ACCL[%08lx]\n", \
96 regs
->acc0h
, regs
->acc0l
);
98 #error unknown isa configuration
103 * Free current thread data structures etc..
105 void exit_thread(void)
108 DPRINTK("pid = %d\n", current
->pid
);
111 void flush_thread(void)
113 DPRINTK("pid = %d\n", current
->pid
);
114 memset(¤t
->thread
.debug_trap
, 0, sizeof(struct debug_trap
));
117 void release_thread(struct task_struct
*dead_task
)
120 DPRINTK("pid = %d\n", dead_task
->pid
);
123 /* Fill in the fpu structure for a core dump.. */
124 int dump_fpu(struct pt_regs
*regs
, elf_fpregset_t
*fpu
)
126 return 0; /* Task didn't use the fpu at all. */
129 int copy_thread(unsigned long clone_flags
, unsigned long spu
,
130 unsigned long arg
, struct task_struct
*tsk
)
132 struct pt_regs
*childregs
= task_pt_regs(tsk
);
133 extern void ret_from_fork(void);
134 extern void ret_from_kernel_thread(void);
136 if (unlikely(tsk
->flags
& PF_KTHREAD
)) {
137 memset(childregs
, 0, sizeof(struct pt_regs
));
138 childregs
->psw
= M32R_PSW_BIE
;
139 childregs
->r1
= spu
; /* fn */
141 tsk
->thread
.lr
= (unsigned long)ret_from_kernel_thread
;
144 *childregs
= *current_pt_regs();
146 childregs
->spu
= spu
;
147 childregs
->r0
= 0; /* Child gets zero as return value */
148 tsk
->thread
.lr
= (unsigned long)ret_from_fork
;
150 tsk
->thread
.sp
= (unsigned long)childregs
;
156 * These bracket the sleeping functions..
158 #define first_sched ((unsigned long) scheduling_functions_start_here)
159 #define last_sched ((unsigned long) scheduling_functions_end_here)
161 unsigned long get_wchan(struct task_struct
*p
)
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