97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*
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* Copyright (C) 2007-2010 Apple Inc. All rights reserved.
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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#ifndef __ARCH_H
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#define __ARCH_H
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#include <sys/types.h>
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#include <compiler.h>
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__BEGIN_DECLS
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struct arch_task;
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struct task;
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int arch_cpu_init(bool resume);
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int arch_cpu_init_posttasks(void);
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int arch_cpu_quiesce(void);
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void arch_halt(void);
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void arch_spin(void) __attribute__((noreturn));
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u_int32_t arch_get_noncached_address(u_int32_t address);
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u_int32_t arch_enable_ints(void);
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u_int32_t arch_disable_ints(void);
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u_int32_t arch_restore_ints(u_int32_t state);
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/*
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* arch_task_create
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*
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* Initialises the architecture-specific fields in the given task
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* such that it can be switched to and run.
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*/
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int arch_task_create(struct task *); // used internally by task_create()
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/*
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* arch_task_context_switch
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*
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* Switches execution from the current task to a new task. This can be used to
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* save the current state by switching from and to the same task.
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*/
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void arch_task_context_switch(struct arch_task *old, struct arch_task *new_task);
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/*
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* arch_task_context_restore
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*
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* Switches execution to a previously saved state.
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*/
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void arch_task_context_restore(struct arch_task *restore_context);
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/*
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* Prints a backtrace for the current execution context.
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*/
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void arch_backtrace_current_task(void *stack_base, size_t stack_len);
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/*
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* Prints a backtrace for the given task.
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*/
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void arch_backtrace_task(struct arch_task *arch_task, void *stack_base, size_t stack_len);
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#if WITH_VFP
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/*
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* arch_task_fp_enable
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*
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* Enable floating point support for the current task.
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*/
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bool arch_task_fp_enable(bool enable);
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#endif
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/*
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* Collects entropy by reading a counter across
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* an asynchronous boundary. The returned word
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* will ideally contain at least one bit of entropy.
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*/
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u_int32_t arch_get_entropy(volatile u_int32_t *counter_address);
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extern const char *build_banner_string;
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extern const char *build_style_string;
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extern const char *build_tag_string;
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extern void _text_start __segment_start_sym(__TEXT);
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extern void _text_end __segment_end_sym(__TEXT);
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extern void _data_start __segment_start_sym(__DATA);
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extern void _data_end __segment_end_sym(__DATA);
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__END_DECLS
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#endif
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