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55af5c83cb
Utcb support has beed added. It has the same drawback as in the stack support: the area in questen has to be already mapped-in. There is some basic infrastructure for utcb to support mapping but it is far from being complete. MAPPING_ENABLE symbolic constant controls this behaviour. There are also some minor fixes for the stack support and the utcb common helper routines.
42 lines
854 B
C
42 lines
854 B
C
/*
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* UTCB handling helper routines
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*
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* Copyright (C) 2009 B Labs Ltd.
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*/
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#ifndef __LIB_UTCB_H__
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#define __LIB_UTCB_H__
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#include "utcb-common.h"
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#define UTCB_START_ADDR(utcb) ((unsigned long)(utcb))
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#define UTCB_END_ADDR(utcb) \
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((unsigned long)((utcb) + (sizeof(utcb))))
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int set_utcb_params(unsigned long utcb_start_addr,
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unsigned long utcb_end_addr);
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//#define MAPPING_ENABLE
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#if defined(MAPPING_ENABLE)
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#define IS_UTCB_SETUP() (utcb_table_ptr)
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struct utcb_entry *utcb_table_ptr;
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struct utcb_entry {
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struct utcb_desc *udesc;
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unsigned long utcb_phys_base;
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};
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unsigned long get_utcb_addr(struct task_ids *parent_id, struct task_ids *child_id);
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#else /* !MAPPING_ENABLE */
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#define IS_UTCB_SETUP() (udesc_ptr)
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struct utcb_desc *udesc_ptr;
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unsigned long get_utcb_addr(void);
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#endif /* MAPPING_ENABLE */
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#endif /* __LIB_UTCB_H__ */
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