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cada0f8f18
- KIP's pointer to UTCB seems to work with existing l4lib ipc functions. - Works up to clone() - In clone we mmap() the same UTCB on each new thread - excessive. - Generally during page fault handling, cloned threads may fault on the same page multiple times even though a single handling would be enough for all of them. Need to detect and handle this.
27 lines
868 B
C
27 lines
868 B
C
/*
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* Userspace thread control block
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#ifndef __GLUE_ARM_MESSAGE_H__
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#define __GLUE_ARM_MESSAGE_H__
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#include INC_GLUE(memlayout.h)
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#define MR_REST (UTCB_SIZE - MR_TOTAL - 2) /* -2 is for fields on utcb */
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#define MR_TOTAL 6
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#define MR_TAG 0 /* Contains the purpose of message */
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#define MR_SENDER 1 /* For anythread receivers to discover sender */
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#define MR_RETURN 0 /* Contains the posix return value. */
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/* These define the mr start - end range that isn't used by userspace syslib */
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#define MR_UNUSED_START 2 /* The first mr that's not used by syslib.h */
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#define MR_UNUSED_TOTAL (MR_TOTAL - MR_UNUSED_START)
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#define MR_USABLE_TOTAL MR_UNUSED_TOTAL
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/* These are defined so that we don't hard-code register names */
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#define MR0_REGISTER r3
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#define MR_RETURN_REGISTER r3
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#endif /* __GLUE_ARM_MESSAGE_H__ */
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