utcb.h

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/*****************************************************************************/
/*
 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
 *               Alexander Warg <warg@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * License: see LICENSE.spdx (in this directory or the directories above)
 */
/*****************************************************************************/
#ifndef __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__
#define __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__
 
#include <l4/sys/types.h>


#define L4_UTCB_EXCEPTION_REGS_SIZE    19

#define L4_UTCB_GENERIC_DATA_SIZE      63

#define L4_UTCB_GENERIC_BUFFERS_SIZE   58

#define L4_UTCB_MSG_REGS_OFFSET        0

#define L4_UTCB_BUF_REGS_OFFSET        (64 * sizeof(l4_umword_t))

#define L4_UTCB_THREAD_REGS_OFFSET     (123 * sizeof(l4_umword_t))

#define L4_UTCB_INHERIT_FPU            (1UL << 24)

#define L4_UTCB_OFFSET                 512

struct l4_exc_regs_t
{
  l4_umword_t es;      
  l4_umword_t ds;      
  l4_umword_t gs;      
  l4_umword_t fs;      
 
  l4_umword_t edi;     
  l4_umword_t esi;     
  l4_umword_t ebp;     
  l4_umword_t pfa;     
  l4_umword_t ebx;     
  l4_umword_t edx;     
  l4_umword_t ecx;     
  l4_umword_t eax;     
 
  l4_umword_t trapno;  
  l4_umword_t err;     
 
  l4_umword_t ip;     
  l4_umword_t dummy1;  
  l4_umword_t flags;  
  l4_umword_t sp;     
  l4_umword_t ss;     
};
 
/*
 * ==================================================================
 * Implementations.
 */
 
L4_INLINE l4_utcb_t *l4_utcb_direct(void) L4_NOTHROW
{
  l4_utcb_t *utcb;
  __asm__ ("mov %%fs:0, %0" : "=r" (utcb));
  return utcb;
}
 
L4_INLINE l4_umword_t l4_utcb_exc_pc(l4_exc_regs_t const *u) L4_NOTHROW
{
  return u->ip;
}
 
L4_INLINE void l4_utcb_exc_pc_set(l4_exc_regs_t *u, l4_addr_t pc) L4_NOTHROW
{
  u->ip = pc;
}
 
L4_INLINE void l4_utcb_exc_sp_set(l4_exc_regs_t *u, l4_addr_t sp) L4_NOTHROW
{
  u->sp = sp;
}
 
L4_INLINE l4_umword_t l4_utcb_exc_typeval(l4_exc_regs_t const *u) L4_NOTHROW
{
  return u->trapno;
}
 
L4_INLINE int l4_utcb_exc_is_pf(l4_exc_regs_t const *u) L4_NOTHROW
{
  return u->trapno == 14;
}
 
L4_INLINE l4_addr_t l4_utcb_exc_pfa(l4_exc_regs_t const *u) L4_NOTHROW
{
  return (u->pfa & ~7UL) | (u->err & 2);
}
 
L4_INLINE int l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const *u) L4_NOTHROW
{
  return l4_utcb_exc_typeval(u) == 0xff;
}
 
#endif /* ! __L4_SYS__INCLUDE__ARCH_X86__UTCB_H__ */