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UTCB update

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Added 8 notify slots of 1 byte each. These will be notification
slots for irqs and other threads.

Also now userspace refers to kernel's utcb definition, so they're
in sync.
This commit is contained in:
Bahadir Balban
2009-11-24 14:45:43 +02:00
parent e0c40ece5d
commit b5e6c66426
2 changed files with 5 additions and 14 deletions
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12
conts/libl4/include/l4lib/arch-arm/utcb.h
View File

@@ -17,20 +17,10 @@
#include <string.h>
#include <stdio.h>
/* UTCB implementation */
/*
* NOTE: In syslib.h the first few mrs are used by data frequently
* needed for all ipcs. Those mrs are defined the kernel message.h
* See kernel glue/arch/message.h for utcb details
*/
struct utcb {
u32 mr[MR_TOTAL]; /* MRs that are mapped to real registers */
u32 saved_tag; /* Saved tag field for stacked ipcs */
u32 saved_sender; /* Saved sender field for stacked ipcs */
u32 mr_rest[MR_REST]; /* Complete the utcb for up to 64 words */
};
extern struct kip *kip;

7
include/l4/glue/arm/message.h
View File

@@ -58,7 +58,7 @@
* Complicated for you? Suggest a simpler design and it shall be implemented!
*/
#define MR_REST ((UTCB_SIZE >> 2) - MR_TOTAL - 2) /* -2 is for fields on utcb */
#define MR_REST ((UTCB_SIZE >> 2) - MR_TOTAL - 4) /* -4 is for fields on utcb */
#define MR_TOTAL 6
#define MR_TAG 0 /* Contains the purpose of message */
#define MR_SENDER 1 /* For anythread receivers to discover sender */
@@ -78,14 +78,15 @@
#include INC_GLUE(memlayout.h)
#if defined (__KERNEL__)
#if !defined (__ASSEMBLY__)
struct utcb {
u32 mr[MR_TOTAL]; /* MRs that are mapped to real registers */
u32 saved_tag; /* Saved tag field for stacked ipcs */
u32 saved_sender; /* Saved sender field for stacked ipcs */
u8 notify[8]; /* Notification slots */
u32 mr_rest[MR_REST]; /* Complete the utcb for up to 64 words */
};
#endif
#endif /* __GLUE_ARM_MESSAGE_H__ */