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dce3a9a47c
Headers 3 headers related to message registers and utcbs are now merged under utcb.h in libl4. Some message register definitions used by the kernel are now moved into kernel's glue/message.h. This avoids the duplication of same definitions. Also the total number of mregs are now determined by arch-specific kernel header, which is good.
49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
#ifndef __ARM_UTCB_H__
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#define __ARM_UTCB_H__
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#define USER_UTCB_REF 0xFF000FF0
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#define L4_KIP_ADDRESS 0xFF000000
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#define UTCB_KIP_OFFSET 0xFF0
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#ifndef __ASSEMBLY__
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#include <l4lib/types.h>
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#include <l4/macros.h>
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#include INC_GLUE(message.h)
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/*
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* NOTE: In syslib.h the first few mrs are used by data frequently
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* needed for all ipcs. Those mrs are defined the kernel message.h
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*/
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/* Compact utcb for now! :-) */
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struct utcb {
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u32 mr[MR_TOTAL];
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u32 tid; /* Thread id */
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/*
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* This field is used by servers as the ptr to current tcb,
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* i.e. the task that this server is serving to.
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*/
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unsigned long usr_handle;
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};
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/* FIXME: LICENSE/LICENCE */
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static inline struct utcb *__L4_ARM_Utcb()
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{
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return (struct utcb *)(*(struct utcb **)USER_UTCB_REF);
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}
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/* Functions to read/write utcb registers */
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static inline unsigned int read_mr(int offset)
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{
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return __L4_ARM_Utcb()->mr[offset];
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}
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static inline void write_mr(unsigned int offset, unsigned int val)
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{
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__L4_ARM_Utcb()->mr[offset] = val;
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* __ARM_UTCB_H__ */
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