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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/arch/m32r/kernel/process.c | |
4 | * | |
5 | * Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata, | |
6 | * Hitoshi Yamamoto | |
7 | * Taken from sh version. | |
8 | * Copyright (C) 1995 Linus Torvalds | |
9 | * SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima | |
10 | */ | |
11 | ||
12 | #undef DEBUG_PROCESS | |
13 | #ifdef DEBUG_PROCESS | |
14 | #define DPRINTK(fmt, args...) printk("%s:%d:%s: " fmt, __FILE__, __LINE__, \ | |
80a914dc | 15 | __func__, ##args) |
1da177e4 LT |
16 | #else |
17 | #define DPRINTK(fmt, args...) | |
18 | #endif | |
19 | ||
20 | /* | |
21 | * This file handles the architecture-dependent parts of process handling.. | |
22 | */ | |
23 | ||
24 | #include <linux/fs.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
b17b0153 | 26 | #include <linux/sched/debug.h> |
29930025 | 27 | #include <linux/sched/task.h> |
68db0cf1 | 28 | #include <linux/sched/task_stack.h> |
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/ptrace.h> | |
31 | #include <linux/unistd.h> | |
1da177e4 | 32 | #include <linux/hardirq.h> |
48ae077c | 33 | #include <linux/rcupdate.h> |
1da177e4 LT |
34 | |
35 | #include <asm/io.h> | |
7c0f6ba6 | 36 | #include <linux/uaccess.h> |
1da177e4 LT |
37 | #include <asm/mmu_context.h> |
38 | #include <asm/elf.h> | |
39 | #include <asm/m32r.h> | |
40 | ||
41 | #include <linux/err.h> | |
42 | ||
5e38291d EB |
43 | void (*pm_power_off)(void) = NULL; |
44 | EXPORT_SYMBOL(pm_power_off); | |
1da177e4 | 45 | |
1da177e4 LT |
46 | void machine_restart(char *__unused) |
47 | { | |
0d34c86c HT |
48 | #if defined(CONFIG_PLAT_MAPPI3) |
49 | outw(1, (unsigned long)PLD_REBOOT); | |
50 | #endif | |
51 | ||
1da177e4 LT |
52 | printk("Please push reset button!\n"); |
53 | while (1) | |
54 | cpu_relax(); | |
55 | } | |
56 | ||
1da177e4 LT |
57 | void machine_halt(void) |
58 | { | |
59 | printk("Please push reset button!\n"); | |
60 | while (1) | |
61 | cpu_relax(); | |
62 | } | |
63 | ||
1da177e4 LT |
64 | void machine_power_off(void) |
65 | { | |
66 | /* M32R_FIXME */ | |
67 | } | |
68 | ||
1da177e4 LT |
69 | void show_regs(struct pt_regs * regs) |
70 | { | |
71 | printk("\n"); | |
a43cb95d TH |
72 | show_regs_print_info(KERN_DEFAULT); |
73 | ||
1da177e4 LT |
74 | printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \ |
75 | regs->bpc, regs->psw, regs->lr, regs->fp); | |
76 | printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \ | |
77 | regs->bbpc, regs->bbpsw, regs->spu, regs->spi); | |
78 | printk("R0 [%08lx]:R1 [%08lx]:R2 [%08lx]:R3 [%08lx]\n", \ | |
79 | regs->r0, regs->r1, regs->r2, regs->r3); | |
80 | printk("R4 [%08lx]:R5 [%08lx]:R6 [%08lx]:R7 [%08lx]\n", \ | |
81 | regs->r4, regs->r5, regs->r6, regs->r7); | |
82 | printk("R8 [%08lx]:R9 [%08lx]:R10[%08lx]:R11[%08lx]\n", \ | |
83 | regs->r8, regs->r9, regs->r10, regs->r11); | |
84 | printk("R12[%08lx]\n", \ | |
85 | regs->r12); | |
86 | ||
87 | #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2) | |
88 | printk("ACC0H[%08lx]:ACC0L[%08lx]\n", \ | |
89 | regs->acc0h, regs->acc0l); | |
90 | printk("ACC1H[%08lx]:ACC1L[%08lx]\n", \ | |
91 | regs->acc1h, regs->acc1l); | |
92 | #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) | |
93 | printk("ACCH[%08lx]:ACCL[%08lx]\n", \ | |
9674dcf7 | 94 | regs->acc0h, regs->acc0l); |
1da177e4 LT |
95 | #else |
96 | #error unknown isa configuration | |
97 | #endif | |
98 | } | |
99 | ||
1da177e4 LT |
100 | void flush_thread(void) |
101 | { | |
102 | DPRINTK("pid = %d\n", current->pid); | |
103 | memset(¤t->thread.debug_trap, 0, sizeof(struct debug_trap)); | |
104 | } | |
105 | ||
106 | void release_thread(struct task_struct *dead_task) | |
107 | { | |
108 | /* do nothing */ | |
109 | DPRINTK("pid = %d\n", dead_task->pid); | |
110 | } | |
111 | ||
112 | /* Fill in the fpu structure for a core dump.. */ | |
113 | int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) | |
114 | { | |
115 | return 0; /* Task didn't use the fpu at all. */ | |
116 | } | |
117 | ||
6f2c55b8 | 118 | int copy_thread(unsigned long clone_flags, unsigned long spu, |
afa86fc4 | 119 | unsigned long arg, struct task_struct *tsk) |
1da177e4 | 120 | { |
6c3559fc | 121 | struct pt_regs *childregs = task_pt_regs(tsk); |
1da177e4 | 122 | extern void ret_from_fork(void); |
ea4a1da9 AV |
123 | extern void ret_from_kernel_thread(void); |
124 | ||
125 | if (unlikely(tsk->flags & PF_KTHREAD)) { | |
126 | memset(childregs, 0, sizeof(struct pt_regs)); | |
127 | childregs->psw = M32R_PSW_BIE; | |
128 | childregs->r1 = spu; /* fn */ | |
129 | childregs->r0 = arg; | |
130 | tsk->thread.lr = (unsigned long)ret_from_kernel_thread; | |
131 | } else { | |
132 | /* Copy registers */ | |
92bbe6cd AV |
133 | *childregs = *current_pt_regs(); |
134 | if (spu) | |
135 | childregs->spu = spu; | |
ea4a1da9 AV |
136 | childregs->r0 = 0; /* Child gets zero as return value */ |
137 | tsk->thread.lr = (unsigned long)ret_from_fork; | |
138 | } | |
1da177e4 | 139 | tsk->thread.sp = (unsigned long)childregs; |
1da177e4 LT |
140 | |
141 | return 0; | |
142 | } | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * These bracket the sleeping functions.. | |
146 | */ | |
147 | #define first_sched ((unsigned long) scheduling_functions_start_here) | |
148 | #define last_sched ((unsigned long) scheduling_functions_end_here) | |
149 | ||
150 | unsigned long get_wchan(struct task_struct *p) | |
151 | { | |
152 | /* M32R_FIXME */ | |
153 | return (0); | |
154 | } |