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
);
51 * The idle thread. There's no useful work to be
52 * done, so just try to conserve power and have a
53 * low exit latency (ie sit in a loop waiting for
54 * somebody to say that they'd like to reschedule)
58 /* endless idle loop with no priority at all */
61 while (!need_resched())
64 schedule_preempt_disabled();
68 void machine_restart(char *__unused
)
70 #if defined(CONFIG_PLAT_MAPPI3)
71 outw(1, (unsigned long)PLD_REBOOT
);
74 printk("Please push reset button!\n");
79 void machine_halt(void)
81 printk("Please push reset button!\n");
86 void machine_power_off(void)
91 void show_regs(struct pt_regs
* regs
)
94 printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \
95 regs
->bpc
, regs
->psw
, regs
->lr
, regs
->fp
);
96 printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \
97 regs
->bbpc
, regs
->bbpsw
, regs
->spu
, regs
->spi
);
98 printk("R0 [%08lx]:R1 [%08lx]:R2 [%08lx]:R3 [%08lx]\n", \
99 regs
->r0
, regs
->r1
, regs
->r2
, regs
->r3
);
100 printk("R4 [%08lx]:R5 [%08lx]:R6 [%08lx]:R7 [%08lx]\n", \
101 regs
->r4
, regs
->r5
, regs
->r6
, regs
->r7
);
102 printk("R8 [%08lx]:R9 [%08lx]:R10[%08lx]:R11[%08lx]\n", \
103 regs
->r8
, regs
->r9
, regs
->r10
, regs
->r11
);
104 printk("R12[%08lx]\n", \
107 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
108 printk("ACC0H[%08lx]:ACC0L[%08lx]\n", \
109 regs
->acc0h
, regs
->acc0l
);
110 printk("ACC1H[%08lx]:ACC1L[%08lx]\n", \
111 regs
->acc1h
, regs
->acc1l
);
112 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
113 printk("ACCH[%08lx]:ACCL[%08lx]\n", \
114 regs
->acc0h
, regs
->acc0l
);
116 #error unknown isa configuration
121 * Free current thread data structures etc..
123 void exit_thread(void)
126 DPRINTK("pid = %d\n", current
->pid
);
129 void flush_thread(void)
131 DPRINTK("pid = %d\n", current
->pid
);
132 memset(¤t
->thread
.debug_trap
, 0, sizeof(struct debug_trap
));
135 void release_thread(struct task_struct
*dead_task
)
138 DPRINTK("pid = %d\n", dead_task
->pid
);
141 /* Fill in the fpu structure for a core dump.. */
142 int dump_fpu(struct pt_regs
*regs
, elf_fpregset_t
*fpu
)
144 return 0; /* Task didn't use the fpu at all. */
147 int copy_thread(unsigned long clone_flags
, unsigned long spu
,
148 unsigned long arg
, struct task_struct
*tsk
)
150 struct pt_regs
*childregs
= task_pt_regs(tsk
);
151 extern void ret_from_fork(void);
152 extern void ret_from_kernel_thread(void);
154 if (unlikely(tsk
->flags
& PF_KTHREAD
)) {
155 memset(childregs
, 0, sizeof(struct pt_regs
));
156 childregs
->psw
= M32R_PSW_BIE
;
157 childregs
->r1
= spu
; /* fn */
159 tsk
->thread
.lr
= (unsigned long)ret_from_kernel_thread
;
162 *childregs
= *current_pt_regs();
164 childregs
->spu
= spu
;
165 childregs
->r0
= 0; /* Child gets zero as return value */
166 tsk
->thread
.lr
= (unsigned long)ret_from_fork
;
168 tsk
->thread
.sp
= (unsigned long)childregs
;
174 * These bracket the sleeping functions..
176 #define first_sched ((unsigned long) scheduling_functions_start_here)
177 #define last_sched ((unsigned long) scheduling_functions_end_here)
179 unsigned long get_wchan(struct task_struct
*p
)
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