/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 * 
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * IRIX OSI header file. Extends afs_osi.h.
 *
 * afs_osi.h includes this file, which is the only way this file should
 * be included in a source file. This file can redefine macros declared in
 * afs_osi.h.
 */
#ifndef _OSI_MACHDEP_H_
#define _OSI_MACHDEP_H_

#include <sys/sema.h>
#include <sys/pda.h>
extern kmutex_t afs_global_lock;


#undef osi_Time
extern time_t time;
#define osi_Time() (time)

#define	AFS_UCRED	ucred

#define osi_vnhold(avc, r)  do { VN_HOLD((struct vnode *)(avc)); } while(0)

#undef afs_osi_Alloc_NoSleep
extern void *afs_osi_Alloc_NoSleep(size_t size);


#ifdef AFS_SGI64_ENV
#include <sys/flock.h>
extern flid_t osi_flid;
#define v_op v_bh.bh_first->bd_ops
#define v_data v_bh.bh_first->bd_pdata
#define vfs_data vfs_bh.bh_first->bd_pdata
#endif /* AFS_SGI64_ENV */


/*
 * Global lock, semaphore, mutex and state vector support.
 */
#define SV_INIT(cv, nm, t, c)	cv_init(cv, nm, t, c)
/* Spinlock macros */
#define SV_TYPE sv_t
#define SV_SIGNAL(cv)           sv_signal(cv)
#define SPINLOCK_INIT(l, nm)    spinlock_init((l),(nm))
#define SPLOCK(l)	        mp_mutex_spinlock(&(l))
#define SPUNLOCK(l,s)           mp_mutex_spinunlock(&(l),s)
#define SP_WAIT(l, s, cv, p)    mp_sv_wait_sig(cv, p, (void*)(&(l)), s)
#ifdef AFS_SGI64_ENV
#ifdef AFS_SGI65_ENV
/* Add PLTWAIT for afsd's to wait so we don't rack up the load average. */
#define AFSD_PRI() ((kt_basepri(curthreadp) == PTIME_SHARE) ? PZERO : (PZERO|PLTWAIT))
#undef AFS_MUTEX_ENTER
#define AFS_MUTEX_ENTER(mp) \
  MACRO_BEGIN \
    register struct kthread *_kthreadP; \
    while(mutex_tryenter(mp) == 0) { \
      _kthreadP = (struct kthread*)mutex_owner(mp); \
      if (_kthreadP != NULL && _kthreadP->k_sonproc == CPU_NONE) { \
          mutex_lock(mp, AFSD_PRI()); \
          break; \
      } \
    } \
  MACRO_END

#else /* AFS_SGI65_ENV */
/* Add PLTWAIT for afsd's to wait so we don't rack up the load average. */
#define AFSD_PRI() ((curprocp && curprocp->p_rss==0) ? (PZERO|PLTWAIT) : PZERO)

#define AFS_MUTEX_ENTER(mp) \
  MACRO_BEGIN \
    kthread_t *kt; \
    while(mutex_tryenter(mp) == 0) { \
	kt = mutex_owner(mp); \
	if (kt != NULL && kt->k_sonproc == CPU_NONE) { \
	    mutex_lock(mp, AFSD_PRI()); \
	    break; \
	} \
    } \
  MACRO_END
#endif /* AFS_SGI65_ENV */

#define cv_timedwait(cv, l, t)  {				\
				sv_timedwait(cv, AFSD_PRI(), l, 0, 0, &(t), \
					     (struct timespec*)0);	\
				AFS_MUTEX_ENTER(l); \
				}
#ifdef cv_wait
#undef cv_wait
#endif
#define cv_wait(cv, l) {					\
			sv_wait(cv, AFSD_PRI(),  l, 0);	\
			AFS_MUTEX_ENTER(l); \
		       }
#else /* AFS_SGI64_ENV */
#ifdef AFS_SGI62_ENV

#define AFS_MUTEX_ENTER(mp) \
  MACRO_BEGIN \
    register struct proc *_procP; \
    while(mutex_tryenter(mp) == 0) { \
	_procP = mutex_owner(mp); \
	if (_procP != NULL && _procP->p_sonproc == CPU_NONE) { \
	    mutex_enter(mp); \
	    break; \
	} \
    } \
  MACRO_END

#else /* AFS_SGI62_ENV */

#define AFS_MUTEX_ENTER(mp)	mutex_enter(mp)

#endif /* AFS_SGI62_ENV */

#define cv_timedwait(cv, l, t)  {				\
				  sv_timedwait(cv, l, t);	\
				  AFS_GLOCK(); 			\
				}
#endif /* AFS_SGI64_ENV */

#if defined(KERNEL)
#if defined(MP)
#define _MP_NETLOCKS			/* to get sblock to work right */

/* On SGI mutex_owned doesn't work, so simulate this by remembering the owning
 * thread explicitly.  This is only used for debugging so could be disabled for
 * production builds.
 *
 * CAUTION -- The ISAFS_(RX)?GLOCK macros are not safe to use when the lock is
 *     not held if the test may be made at interrupt level as the code may
 *     appear to be running as the process that is (or last was) running at
 *     non-interrupt level. Worse yet, the interrupt may occur just as the 
 *     process is exiting, in which case, the pid may change from the start
 *     of the interrupt to the end, since the u area has been changed. So,
 *     at interrupt level, I'm using the base of the current interrupt stack.
 *     Note that afs_osinet.c also modifies afs_global_owner for osi_Sleep and 
 *     afs_osi_Wakeup. Changes made here should be reflected there as well.
 * NOTE - As of 6.2, we can no longer use mutexes in interrupts, so the above
 *     concern no longer exists.
 */

#ifdef AFS_SGI64_ENV
#ifdef AFS_SGI65_ENV
/* Irix does not check for deadlocks unless it's a debug kernel. */
#define AFS_ASSERT_GNOTME() \
    (!ISAFS_GLOCK() || (panic("afs global lock held be me"), 0))
#define AFS_GLOCK() \
	{ AFS_ASSERT_GNOTME(); AFS_MUTEX_ENTER(&afs_global_lock); }
#else
#define AFS_GLOCK() AFS_MUTEX_ENTER(&afs_global_lock)
#endif
#define AFS_GUNLOCK()  (AFS_ASSERT_GLOCK(),  mutex_exit(&afs_global_lock))
#define ISAFS_GLOCK() mutex_mine(&afs_global_lock)
#else
extern long afs_global_owner;
#define AFS_GLOCK() \
  MACRO_BEGIN \
    AFS_MUTEX_ENTER(&afs_global_lock) ; \
    afs_global_owner = osi_ThreadUnique(); \
  MACRO_END
#define AFS_GUNLOCK() \
    (AFS_ASSERT_GLOCK(), afs_global_owner = 0, mutex_exit(&afs_global_lock))
#define ISAFS_GLOCK() (osi_ThreadUnique() == afs_global_owner)
#endif /* AFS_SGI64_ENV */

#define AFS_RXGLOCK()
#define AFS_RXGUNLOCK()
#define ISAFS_RXGLOCK() 1

#else /* MP */
#define AFS_GLOCK()
#define AFS_GUNLOCK()
#define ISAFS_GLOCK() 1

#define SPLVAR      register int splvar
#define NETPRI      splvar=splnet()
#define USERPRI     splx(splvar)


#endif /* MP */

#endif /* KERNEL  */



#ifdef AFS_SGI64_ENV
#define gop_rdwr(rw,gp,base,len,offset,segflg,ioflag,ulimit,cr,aresid) \
   vn_rdwr((rw),(gp),(base),(len),(offset),(segflg),(ioflag),(ulimit),(cr),\
	   (int *)(aresid), &osi_flid)
#else
#define gop_rdwr(rw,gp,base,len,offset,segflg,ioflag,ulimit,cr,aresid) \
   vn_rdwr((rw),(gp),(base),(len),(offset),(segflg),(ioflag),(ulimit),(cr), \
	   (int *)(aresid))
#endif

#ifdef AFS_SGI64_ENV
#undef suser
#define suser() cap_able(CAP_DEVICE_MGT)
#define afs_suser()	suser()
#else
#define	afs_suser	    suser
#endif

#define afs_hz HZ

#ifdef PAGESIZE
#undef PAGESIZE
#endif
#define PAGESIZE 4096

#ifdef AFS_SGI64_ENV
#undef setuerror
#undef getuerror
#endif


/* OS independent user structure stuff */
/*
 * OSI_GET_CURRENT_PID
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_PID() (u.u_procp->p_pid)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_PID() current_pid()
#endif /* AFS_SGI64_ENV */

#if defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_PID() proc_pid(curproc())
#endif

#define getpid()  OSI_GET_CURRENT_PID()

/*
 * OSI_GET_CURRENT_PROCP
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_PROCP() (u.u_procp)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_PROCP() curprocp
#endif /* AFS_SGI64_ENV */

#if defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_PROCP() UT_TO_PROC(curuthread)
#endif


/*
 * OSI_GET_LOCKID
 *
 * Prior to IRIX 6.4, pid sufficed, now we need kthread.
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_LOCKID() (u.u_procp->p_pid)
#define OSI_NO_LOCKID (-1)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV)
/* IRIX returns k_id, but this way, we've got the thread address for debugging. */
#define OSI_GET_LOCKID() \
	(private.p_curkthread ? (uint64_t)private.p_curkthread : (uint64_t)0)
#define OSI_NO_LOCKID ((uint64_t)-1)
#endif /* AFS_SGI64_ENV */

/*
 * OSI_GET_CURRENT_CRED
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_CRED() (u.u_cred)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_CRED() get_current_cred()
#endif /* AFS_SGI64_ENV */

/*
 * OSI_SET_CURRENT_CRED
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_SET_CURRENT_CRED(x) u.u_cred=x
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV)
#define OSI_SET_CURRENT_CRED(C) set_current_cred((C))
#endif /* AFS_SGI64_ENV */

/*
 * OSI_GET_CURRENT_ABI
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_ABI() (u.u_procp->p_abi)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_ABI() get_current_abi()
#endif /* AFS_SGI64_ENV */

/*
 * OSI_GET_CURRENT_SYSID
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_SYSID() (u.u_procp->p_sysid)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_SYSID() (curprocp->p_flid.fl_sysid)
#endif /* AFS_SGI64_ENV */

/*
 * OSI_GET_CURRENT_COMM
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_COMM() (u.u_comm)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_COMM() (curprocp->p_comm)
#endif /* AFS_SGI64_ENV */

/*
 * OSI_GET_CURRENT_CDIR
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_CDIR() (u.u_cdir)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_CDIR() (curprocp->p_cdir)
#endif /* AFS_SGI64_ENV */

#if defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_CDIR() (curuthread->ut_cdir)
#endif /* AFS_SGI65_ENV */


/*
 * OSI_GET_CURRENT_RDIR
 */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI64_ENV)
#define OSI_GET_CURRENT_RDIR() (u.u_rdir)
#endif /* AFS_SGI_ENV but not AFS_SGI64_ENV */

#if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_RDIR() (curprocp->p_rdir)
#endif /* AFS_SGI64_ENV */

#if defined(AFS_SGI65_ENV)
#define OSI_GET_CURRENT_RDIR() (curuthread->ut_rdir)
#endif /* AFS_SGI65_ENV */



/* Macros for vcache/vnode and vfs arguments to vnode and vfs ops.
 *
 * Note that the _CONVERT routines get the ";" here so that argument lists
 * can have arguments after the OSI_x_CONVERT macro is called.
 */
#ifdef AFS_SGI64_ENV
#undef OSI_VN_ARG
#define OSI_VN_ARG(V) bhv_##V
#undef OSI_VN_DECL
#define OSI_VN_DECL(V)  bhv_desc_t *bhv_##V
#undef OSI_VN_CONVERT
#define OSI_VN_CONVERT(V) struct vnode * V = (struct vnode*)BHV_TO_VNODE(bhv_##V);
#undef OSI_VC_ARG
#define OSI_VC_ARG(V) bhv_##V
#undef OSI_VC_DECL
#define OSI_VC_DECL(V)  bhv_desc_t *bhv_##V
#undef OSI_VC_CONVERT
#define OSI_VC_CONVERT(V) struct vcache * V = (struct vcache*)BHV_TO_VNODE(bhv_##V);
#undef OSI_VFS_ARG
#define OSI_VFS_ARG(V) bhv_##V
#undef OSI_VFS_DECL
#define OSI_VFS_DECL(V)  bhv_desc_t *bhv_##V
#undef OSI_VFS_CONVERT
#define OSI_VFS_CONVERT(V) struct vfs * V = (struct vfs*)bhvtovfs(bhv_##V);
#endif /* AFS_SGI64_ENV */




#endif /* _OSI_MACHDEP_H_ */
