mirror of
https://github.com/drasko/codezero.git
synced 2026-01-19 14:23:15 +01:00
b5e6c66426
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.
94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/*
|
|
* Copyright (C) 2009 Bahadir Bilgehan Balban
|
|
*/
|
|
#ifndef __ARM_UTCB_H__
|
|
#define __ARM_UTCB_H__
|
|
|
|
#define USER_UTCB_REF 0xFF000050
|
|
#define L4_KIP_ADDRESS 0xFF000000
|
|
#define UTCB_KIP_OFFSET 0x50
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <l4lib/types.h>
|
|
#include <l4/macros.h>
|
|
#include <l4/lib/math.h>
|
|
#include INC_GLUE(message.h)
|
|
#include INC_GLUE(memory.h)
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
/*
|
|
* See kernel glue/arch/message.h for utcb details
|
|
*/
|
|
|
|
extern struct kip *kip;
|
|
|
|
|
|
/*
|
|
* Pointer to Kernel Interface Page's UTCB pointer offset.
|
|
*/
|
|
extern struct utcb **kip_utcb_ref;
|
|
|
|
static inline struct utcb *l4_get_utcb()
|
|
{
|
|
/*
|
|
* By double dereferencing, we get the private TLS
|
|
* (aka UTCB). First reference is to the KIP's utcb
|
|
* offset, second is to the utcb itself, to which
|
|
* the KIP's utcb reference had been updated during
|
|
* context switch.
|
|
*/
|
|
return *kip_utcb_ref;
|
|
}
|
|
|
|
/* Functions to read/write utcb registers */
|
|
static inline unsigned int read_mr(int offset)
|
|
{
|
|
if (offset < MR_TOTAL)
|
|
return l4_get_utcb()->mr[offset];
|
|
else
|
|
return l4_get_utcb()->mr_rest[offset - MR_TOTAL];
|
|
}
|
|
|
|
static inline void write_mr(unsigned int offset, unsigned int val)
|
|
{
|
|
if (offset < MR_TOTAL)
|
|
l4_get_utcb()->mr[offset] = val;
|
|
else
|
|
l4_get_utcb()->mr_rest[offset - MR_TOTAL] = val;
|
|
}
|
|
|
|
|
|
static inline void *utcb_full_buffer()
|
|
{
|
|
return &l4_get_utcb()->mr_rest[0];
|
|
}
|
|
|
|
static inline char *utcb_full_strcpy_from(const char *src)
|
|
{
|
|
return strncpy((char *)&l4_get_utcb()->mr_rest[0], src,
|
|
L4_UTCB_FULL_BUFFER_SIZE);
|
|
}
|
|
|
|
static inline void *utcb_full_memcpy_from(const char *src, int size)
|
|
{
|
|
return memcpy(&l4_get_utcb()->mr_rest[0], src,
|
|
min(size, L4_UTCB_FULL_BUFFER_SIZE));
|
|
}
|
|
|
|
static inline char *utcb_full_strcpy_to(char *dst)
|
|
{
|
|
return strncpy(dst, (char *)&l4_get_utcb()->mr_rest[0],
|
|
L4_UTCB_FULL_BUFFER_SIZE);
|
|
}
|
|
|
|
static inline void *utcb_full_memcpy_to(char *dst, int size)
|
|
{
|
|
return memcpy(dst, &l4_get_utcb()->mr_rest[0],
|
|
min(size, L4_UTCB_FULL_BUFFER_SIZE));
|
|
}
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* __ARM_UTCB_H__ */
|