process.c (6546327ad187238ac63d2429701b32becb096fd8) process.c (f7b861b7a6d9d1838cbbb5f4053e61578b86d134)
1/*
2 * linux/arch/arm/kernel/process.c
3 *
4 * Copyright (C) 1996-2000 Russell King - Converted to ARM.
5 * Original Copyright (C) 1995 Linus Torvalds
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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52 "USER_32", "FIQ_32" , "IRQ_32" , "SVC_32" , "UK4_32" , "UK5_32" , "UK6_32" , "ABT_32" ,
53 "UK8_32" , "UK9_32" , "UK10_32", "UND_32" , "UK12_32", "UK13_32", "UK14_32", "SYS_32"
54};
55
56static const char *isa_modes[] = {
57 "ARM" , "Thumb" , "Jazelle", "ThumbEE"
58};
59
1/*
2 * linux/arch/arm/kernel/process.c
3 *
4 * Copyright (C) 1996-2000 Russell King - Converted to ARM.
5 * Original Copyright (C) 1995 Linus Torvalds
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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52 "USER_32", "FIQ_32" , "IRQ_32" , "SVC_32" , "UK4_32" , "UK5_32" , "UK6_32" , "ABT_32" ,
53 "UK8_32" , "UK9_32" , "UK10_32", "UND_32" , "UK12_32", "UK13_32", "UK14_32", "SYS_32"
54};
55
56static const char *isa_modes[] = {
57 "ARM" , "Thumb" , "Jazelle", "ThumbEE"
58};
59
60static volatile int hlt_counter;
61
62void disable_hlt(void)
63{
64 hlt_counter++;
65}
66
67void enable_hlt(void)
68{
69 hlt_counter--;
70 BUG_ON(hlt_counter < 0);
71}
72
73static int __init nohlt_setup(char *__unused)
74{
75 hlt_counter = 1;
76 return 1;
77}
78
79static int __init hlt_setup(char *__unused)
80{
81 hlt_counter = 0;
82 return 1;
83}
84
85__setup("nohlt", nohlt_setup);
86__setup("hlt", hlt_setup);
87
88extern void call_with_stack(void (*fn)(void *), void *arg, void *sp);
89typedef void (*phys_reset_t)(unsigned long);
90
91/*
92 * A temporary stack to use for CPU reset. This is static so that we
93 * don't clobber it with the identity mapping. When running with this
94 * stack, any references to the current task *will not work* so you
95 * should really do as little as possible before jumping to your reset

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163{
164 if (arm_pm_idle)
165 arm_pm_idle();
166 else
167 cpu_do_idle();
168 local_irq_enable();
169}
170
60extern void call_with_stack(void (*fn)(void *), void *arg, void *sp);
61typedef void (*phys_reset_t)(unsigned long);
62
63/*
64 * A temporary stack to use for CPU reset. This is static so that we
65 * don't clobber it with the identity mapping. When running with this
66 * stack, any references to the current task *will not work* so you
67 * should really do as little as possible before jumping to your reset

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135{
136 if (arm_pm_idle)
137 arm_pm_idle();
138 else
139 cpu_do_idle();
140 local_irq_enable();
141}
142
171/*
172 * The idle thread.
173 * We always respect 'hlt_counter' to prevent low power idle.
174 */
175void cpu_idle(void)
143void arch_cpu_idle_prepare(void)
176{
177 local_fiq_enable();
144{
145 local_fiq_enable();
146}
178
147
179 /* endless idle loop with no priority at all */
180 while (1) {
181 tick_nohz_idle_enter();
182 rcu_idle_enter();
183 ledtrig_cpu(CPU_LED_IDLE_START);
184 while (!need_resched()) {
185#ifdef CONFIG_HOTPLUG_CPU
186 if (cpu_is_offline(smp_processor_id()))
187 cpu_die();
148void arch_cpu_idle_enter(void)
149{
150 ledtrig_cpu(CPU_LED_IDLE_START);
151#ifdef CONFIG_PL310_ERRATA_769419
152 wmb();
188#endif
153#endif
154}
189
155
190 /*
191 * We need to disable interrupts here
192 * to ensure we don't miss a wakeup call.
193 */
194 local_irq_disable();
195#ifdef CONFIG_PL310_ERRATA_769419
196 wmb();
156void arch_cpu_idle_exit(void)
157{
158 ledtrig_cpu(CPU_LED_IDLE_END);
159}
160
161#ifdef CONFIG_HOTPLUG_CPU
162void arch_cpu_idle_dead(void)
163{
164 cpu_die();
165}
197#endif
166#endif
198 if (hlt_counter) {
199 local_irq_enable();
200 cpu_relax();
201 } else if (!need_resched()) {
202 stop_critical_timings();
203 if (cpuidle_idle_call())
204 default_idle();
205 start_critical_timings();
206 /*
207 * default_idle functions must always
208 * return with IRQs enabled.
209 */
210 WARN_ON(irqs_disabled());
211 } else
212 local_irq_enable();
213 }
214 ledtrig_cpu(CPU_LED_IDLE_END);
215 rcu_idle_exit();
216 tick_nohz_idle_exit();
217 schedule_preempt_disabled();
218 }
167
168/*
169 * Called from the core idle loop.
170 */
171void arch_cpu_idle(void)
172{
173 if (cpuidle_idle_call())
174 default_idle();
219}
220
221static char reboot_mode = 'h';
222
223int __init reboot_setup(char *str)
224{
225 reboot_mode = str[0];
226 return 1;

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176
177static char reboot_mode = 'h';
178
179int __init reboot_setup(char *str)
180{
181 reboot_mode = str[0];
182 return 1;

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