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authorRoland McGrath <roland@gnu.org>1996-03-19 20:21:54 +0000
committerRoland McGrath <roland@gnu.org>1996-03-19 20:21:54 +0000
commitb20e47cb14ec8edccab7c722743a731e67280702 (patch)
tree2606832a6d914c9c629494cb47b8a87b1d95f40a /sysdeps/unix/sysv/linux/alpha/ioperm.c
parente384537164e04d46fe1749899715abd72d33c54e (diff)
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Tue Mar 19 14:18:42 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
	* sysdeps/unix/bsd/pause.c: Moved to sysdeps/unix/common/pause.c.

Mon Mar  4 20:17:28 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* sysdeps/unix/sysv/linux/adjtime.c: Use INT_MAX instead of LONG_MAX.

	* sysdeps/unix/sysv/Makefile (sysdep_routines): Don't add s_getdents.

	* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Don't add mount,
	umount.

	* sysdeps/alpha/__math.h (atan, cabs): New functions.

	* sysdeps/unix/sysv/linux/alpha/sigsuspend.S: new file (syscall
 	expects set-value, not pointer to it).

Sun Feb 25 22:36:10 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* sysdeps/unix/sysv/linux/alpha/profil-counter.h: New file.

	* gmon/gmon.c (__bb_head): new variable.
	(write_hist, write_call_graph, write_bb_counts): new functions.
	(_mcleanup): modified to call above functions instead of directly
 	writing out gmon.out.
	* gmon/sys/gmon.h (struct __bb): New type.
	(struct gmonhdr): Type removed.
	(struct gmonparam): New member `log_hashfraction'.
	(GMONVERSION): Macro removed.

	* gmon/sys/gmon_out.h, gmon/bb_exit_func.c,
 	sysdeps/generic/bb_init_func.c, sysdeps/alpha/bb_init_func.S: new
 	files.
	* gmon/Makefile (headers): Add sys/gmon_out.h.
	(routines): Add bb_init_func, bb_exit_func.

	* gmon/mcount.c: Avoid integer division.

Wed Feb 21 23:56:41 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* sysdeps/alpha/setjmp.S: switched order in which sp and fp are
 	passed to match what __sigsetjmp_aux() expects.

Tue Feb 20 11:33:46 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (select, bind,
 	connect, getpeername, getsockname, listen, recv, recvfrom,
 	recvmsg, send, sendmsg, sendto, setsockopt, shutdown, socketpair):
 	added to override same-name assembly file in the parent directory.

	* stdlib/stdlib.h: add include of sys/types.h in front of random
 	etc declarations to ensure int32_t is declared.

	* stdlib/random.c, stdlib/random_r.c: replaced "long int" by int32_t
	where 32 bit integers are required.  Also change LONG_MAX into
	0x7fffffff since the intent is to turn off the sign bit in a
	32 bit integer.

	* time/offtime.c (__offtime): Use Paul Eggert's code to deal
	with very large values for "days" (e.g., 64 bit values).

Mon Feb 19 22:22:12 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* stdlib/stdlib.h (__random, __random_r, random_r, struct
 	random_data): use int32_t instead of `long int'.

Sat Feb 17 11:29:29 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* sysdeps/unix/sysv/linux/alpha/ioperm.c: new file.

	* sysdeps/alpha/ffs.S: new file.

	* sysdeps/alpha/fabs.c: File removed.

	* time/tzfile.c (__tzfile_read): counter variable is i, *not*
	num_transitions!

	* time/offtime.c: make capable of dealing with very large (64 bit)
 	time_t values.  Use old algorithm until a year is reached that
	is an integer multiple of 400, then use DAYS_PER_400_YEARS to
	do the remainder in a single division.

	* sysdeps/generic/ffs.c (ffs): fix variable declarations to
	be unsigned int, not unsigned long.

	* string/test-ffs.c (main): add test case with all upper bits
	set.

	* stdlib/tst-strtol.c: add tests cases for machines where
	sizeof(long)==8.

	* stdlib/testrand.c (main): disallow rand() to return negative
 	integers.

	* stdlib/testmb.c (main): fix format to use %lx instead of %x.

	* stdlib/stdlib.h: on 64 bit machines, declare
	struct random_data, __random(),  __random_r, and random_r to
	return "int" instead of "long int".

	* stdlib/random_r.c: 64 bit machines use "int" instead of "long
 	int".  Similarly, use INT_MAX instead of LONG_MAX.

	* stdlib/random.c: on 64 bit machines, randtbl[] and __random[]
 	need to operate on "int" instead of "long int".

	* locale/locfile-hash.c (compute_hashval): make shifted constant
	a long to avoid loosing bits on 64 bit machines.

	* dirent/tst-seekdir.c (main): fix confusing comment; print
	a line to mark point where directory is rewound.

Fri Feb 16 15:01:49 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* time/strftime.c (strftime): any hour > 11 is PM (not > 12!).

Wed Feb 14 00:21:17 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* sysdeps/unix/sysv/linux/alpha/Makefile,
	sysdeps/unix/sysv/linux/alpha/brk.S,
	sysdeps/unix/sysv/linux/alpha/fpu_control.c,
	sysdeps/unix/sysv/linux/alpha/fpu_control.h,
	sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S,
	sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S,
	sysdeps/unix/sysv/linux/alpha/pipe.S,
	sysdeps/unix/sysv/linux/alpha/setfpucw.c,
	sysdeps/unix/sysv/linux/alpha/sigprocmask.c,
	sysdeps/unix/sysv/linux/alpha/speed.c,
	sysdeps/unix/sysv/linux/alpha/start.S,
	sysdeps/unix/sysv/linux/alpha/syscall.S,
	sysdeps/unix/sysv/linux/alpha/syscalls.list,
	sysdeps/unix/sysv/linux/alpha/alpha/regdef.h,
	sysdeps/unix/sysv/linux/alpha/sysdep.S,
	sysdeps/unix/sysv/linux/alpha/sysdep.h: New files.

	* sysdeps/alpha/setjmp_aux.c (__sigsetjmp_aux): restore return
 	address register before returning (gcc 2.7.1 doesn't do it,
 	presumably because $26 is declared as a global variable).

	* sysdeps/unix/sysv/linux/sys/mman.h: msync was missing "flags"
	argument.

	* sysdeps/unix/alarm.c (alarm): do roundup using test & increment
	instead of multiplication.

	* sysdeps/posix/sleep.c (sleep): initialize sa_mask to mask of
	currently blocked signals instead of the empty mask to ensure
	that execution of alarm handler occurs with none of the currently
	blocked signals enabled.

	* sysdeps/unix/alpha/sysdep.h: new file (adapted from OSF/1 version).

	* sysdeps/unix/bsd/osf/alpha/sysdep.h: include
 	sysdeps/unix/alpha/sysdep.h and removed definitions now in that file.

	* sysdeps/alpha/divrem.S, sysdeps/alpha/htonl.S,
	sysdeps/alpha/htons.S, sysdeps/alpha/machine-gmon.h,
	sysdeps/alpha/_mcount.S, sysdeps/alpha/ntohl.s, sysdeps/alpha/ntohs.s,
	sysdeps/alpha/strlen.S: New files.

	* sysdeps/alpha/divl.S, sysdeps/alpha/divlu.S, sysdeps/alpha/divq.S,
	sysdeps/alpha/divqu.S, sysdeps/alpha/divrem.m4,
	sysdeps/alpha/macros.m4, sysdeps/alpha/reml.S, sysdeps/alpha/remlu.S,
	sysdeps/alpha/remq.S, sysdeps/alpha/remqu.S, sysdeps/alpha/strlen.c:
 	Removed.

	* sysdeps/generic/sbrk.c (__sbrk): argument is of type ptrdiff_t, not
	int.

	* sysdeps/alpha/__longjmp.c (__longjmp): moved dummy while loop
	to end of function to avoid a jump across NOPs.

	* sysdeps/alpha/Makefile (sysdep_routines): Removed all rules
 	pertaining to integer division/remainder routines since new code
 	doesn't require them.

	* sunrpc/xdr_mem.c, sunrpc/xdr_stdio.c: Use 4 instead of sizeof(long)
	where 32 bit quantities are consumed/stored.  Various other minor
	64-bit cleanups (casting).

	* sunrpc/xdr.c (xdr_int): test for sizeof(int)==4 to determine
 	whether xdr_long or xdr_short should be used to encode an int.
  	Notice that an xdr_long is 4 bytes independent of the architecture
	(otherwise no Alpha could interoperate with existing NFS servers,
 	for example).  Ditto for enums.

	* sunrpc/svc_udp.c (svcudp_recv): changed test from 4*sizeof(u_long)
	to 16 since it really wants 16 bytes.

	* sunrpc/svc.c (maskp): changed from u_long* to u_int32*.

	* sunrpc/rpc_cmsg.c (xdr_callmsg), sunrpc/svc_authux.c: increment
	"buf" pointer by casting it to a char* first since a long* may be 8
 	bytes or more and oa->oa_length may be any multiple of 4.

	* sunrpc/rpc/xdr.h (IXDR_GET_LONG, IXDR_PUT_LONG): change casts to
 	u_int32_t (instead of u_long).

	* sunrpc/clnt_udp.c (clntudp_call): replaced sizeof(u_long) by 4
	since it really is testing for 32 bits.  Fixed casts to use
	u_int32 instead of u_long.
	* sunrpc/xdr_rec.c: Likewise.

	* sunrpc/clnt_tcp.c (clnttcp_call): replaced u_long by u_int32.
	* sunrpc/rpc/auth.h: Likewise.

	* limits.h (LONG_MAX, LONG_MIN, ULONG_MAX): use 64 bit values
	for Alpha.

Tue Mar 19 13:27:49 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>

	* sysdeps/i386/fpu/__math.h: New file.
	Contributed by John C. Bowman <bowman@hagar.ph.utexas.edu>.

Sun Mar 17 00:28:16 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/posix/clock.c: Don't multiply the return value by
	CLOCKS_PER_SEC or CLK_TCK.

	* sysdeps/mach/hurd/getcwd.c: Fail with ENOENT if a parent directory
	scan finds no match.

	* posix/unistd.h (setpgrp): Declare no-arg version unless __FAVOR_BSD.
	* misc/bsd-compat.c (setpgrp): New function, two arg version.
	* sysdeps/stub/setpgid.c: Remove setpgrp alias.
	* sysdeps/mach/hurd/setpgid.c: Likewise.
	* sysdeps/unix/sysv/sysv4/setpgid.c: Likewise.
	* sysdeps/unix/common/syscalls.list (setpgid): Remove setpgrp alias.
	* sysdeps/unix/sysv/irix4/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/setpgrp.c: Obsolete file removed.
	* posix/setpgrp.c (setpgrp): New file.
	* posix/Makefile (routines): Add setpgrp.

Tue Feb  6 12:46:29 1996  David Mosberger-Tang  <davidm@azstarnet.com>

	* libc-symbols.h (weak_alias, weak_symbol): added definitions
	for ECOFF (HAVE_ECOFF).
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/ioperm.c')
-rw-r--r--sysdeps/unix/sysv/linux/alpha/ioperm.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/ioperm.c b/sysdeps/unix/sysv/linux/alpha/ioperm.c
new file mode 100644
index 0000000000..306c86b96a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/ioperm.c
@@ -0,0 +1,441 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by David Mosberger.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/* I/O access is restricted to ISA port space (ports 0..65535).
+Modern devices hopefully are sane enough not to put any performance
+critical registers in i/o space.
+
+On the first call to ioperm() or _sethae(), the entire (E)ISA port
+space is mapped into the virtual address space at address io.base.
+mprotect() calls are then used to enable/disable access to ports.  Per
+page, there are PAGE_SIZE>>IO_SHIFT I/O ports (e.g., 256 ports on a
+Low Cost Alpha based system using 8KB pages).
+
+Keep in mind that this code should be able to run in a 32bit address
+space.  It is therefore unreasonable to expect mmap'ing the entire
+sparse address space would work (e.g., the Low Cost Alpha chip has an
+I/O address space that's 512MB large!).  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/mman.h>
+
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/system.h>
+
+#undef inb
+#undef inw
+#undef inl
+#undef outb
+#undef outw
+#undef outl
+
+#define PATH_CPUINFO	"/proc/cpuinfo"
+
+#define MAX_PORT	0x10000
+#define vuip		volatile unsigned int *
+
+#define JENSEN_IO_BASE		(IDENT_ADDR + 0x0300000000UL)
+#define APECS_IO_BASE		(IDENT_ADDR + 0x01c0000000UL)
+#define ALCOR_IO_BASE		(IDENT_ADDR + 0x8580000000UL)
+
+enum {
+  IOSYS_JENSEN = 0, IOSYS_APECS = 1, IOSYS_ALCOR = 2
+} iosys_t;
+
+struct ioswtch {
+  void		(*sethae)(unsigned long addr);
+  void		(*outb)(unsigned char b, unsigned long port);
+  void		(*outw)(unsigned short b, unsigned long port);
+  void		(*outl)(unsigned int b, unsigned long port);
+  unsigned int	(*inb)(unsigned long port);
+  unsigned int	(*inw)(unsigned long port);
+  unsigned int	(*inl)(unsigned long port);
+};
+
+static struct platform {
+  const char	*name;
+  int		io_sys;
+} platform[] = {
+  {"Alcor",		IOSYS_ALCOR},
+  {"Avanti",		IOSYS_APECS},
+  {"Cabriolet",		IOSYS_APECS},
+  {"EB64+",		IOSYS_APECS},
+  {"EB66",		IOSYS_APECS},
+  {"EB66P",		IOSYS_APECS},
+  {"Jensen",		IOSYS_JENSEN},
+  {"Mustang",		IOSYS_APECS},
+  {"Noname",		IOSYS_APECS},
+};
+
+
+static struct {
+  struct hae		hae;
+  unsigned long		base;
+  struct ioswtch *	swp;
+  int			sys;
+} io;
+
+
+static inline unsigned long
+port_to_cpu_addr (unsigned long port, int iosys, int size)
+{
+  if (iosys == IOSYS_JENSEN) {
+    return (port << 7) + ((size - 1) << 4) + io.base;
+  } else {
+    return (port << 5) + ((size - 1) << 3) + io.base;
+  }
+}
+
+
+static inline void
+inline_sethae (unsigned long addr, int iosys)
+{
+  if (iosys == IOSYS_JENSEN) {
+    /* hae on the Jensen is bits 31:25 shifted right */
+    addr >>= 25;
+    if (addr != io.hae.cache) {
+	__sethae (addr);
+	io.hae.cache = addr;
+    }
+  } else {
+    unsigned long msb;
+
+    /* no need to set hae if msb is 0: */
+    msb = addr & 0xf8000000;
+    if (msb && msb != io.hae.cache) {
+	__sethae (msb);
+	io.hae.cache = msb;
+    }
+  }
+}
+
+
+static inline void
+inline_outb (unsigned char b, unsigned long port, int iosys)
+{
+  unsigned int w;
+  unsigned long addr = port_to_cpu_addr (port, iosys, 1);
+
+  inline_sethae (0, iosys);
+  asm ("insbl %2,%1,%0" : "r=" (w) : "ri" (port & 0x3), "r" (b));
+  *(vuip)addr = w;
+  mb ();
+}
+
+
+static inline void
+inline_outw (unsigned short b, unsigned long port, int iosys)
+{
+  unsigned int w;
+  unsigned long addr = port_to_cpu_addr (port, iosys, 2);
+
+  inline_sethae (0, iosys);
+  asm ("inswl %2,%1,%0" : "r=" (w) : "ri" (port & 0x3), "r" (b));
+  *(vuip)addr = w;
+  mb ();
+}
+
+
+static inline void
+inline_outl (unsigned int b, unsigned long port, int iosys)
+{
+  unsigned long addr = port_to_cpu_addr (port, iosys, 4);
+
+  if (port >= MAX_PORT)
+    return;
+
+  inline_sethae (0, iosys);
+  *(vuip)addr = b;
+  mb ();
+}
+
+
+static inline unsigned int
+inline_inb (unsigned long port, int iosys)
+{
+  unsigned long result, addr = port_to_cpu_addr (port, iosys, 1);
+
+  inline_sethae (0, iosys);
+  result = *(vuip) addr;
+  result >>= (port & 3) * 8;
+  return 0xffUL & result;
+}
+
+
+static inline unsigned int
+inline_inw (unsigned long port, int iosys)
+{
+  unsigned long result, addr = port_to_cpu_addr (port, iosys, 2);
+
+  inline_sethae (0, iosys);
+  result = *(vuip) addr;
+  result >>= (port & 3) * 8;
+  return 0xffffUL & result;
+}
+
+
+static inline unsigned int
+inline_inl (unsigned long port, int iosys)
+{
+  unsigned long addr = port_to_cpu_addr (port, iosys, 4);
+
+  inline_sethae (0, iosys);
+  return *(vuip) addr;
+}
+
+
+#define DCL_SETHAE(name, iosys)			\
+static void						\
+name##_sethae (unsigned long addr)			\
+{							\
+  inline_sethae (addr, IOSYS_##iosys);			\
+}
+
+#define DCL_OUT(name, func, type, iosys)		\
+static void						\
+name##_##func (unsigned type b, unsigned long addr)	\
+{							\
+  inline_##func (b, addr, IOSYS_##iosys);		\
+}
+
+
+#define DCL_IN(name, func, iosys)			\
+static unsigned int					\
+name##_##func (unsigned long addr)			\
+{							\
+  return inline_##func (addr, IOSYS_##iosys);		\
+}
+
+
+DCL_SETHAE(jensen, JENSEN)
+DCL_OUT(jensen, outb, char,  JENSEN)
+DCL_OUT(jensen, outw, short, JENSEN)
+DCL_OUT(jensen, outl, int,   JENSEN)
+DCL_IN(jensen, inb, JENSEN)
+DCL_IN(jensen, inw, JENSEN)
+DCL_IN(jensen, inl, JENSEN)
+
+/* The APECS functions are also used for ALCOR since they are
+   identical.  */
+
+DCL_SETHAE(apecs, APECS)
+DCL_OUT(apecs, outb, char,  APECS)
+DCL_OUT(apecs, outw, short, APECS)
+DCL_OUT(apecs, outl, int,   APECS)
+DCL_IN(apecs, inb, APECS)
+DCL_IN(apecs, inw, APECS)
+DCL_IN(apecs, inl, APECS)
+
+struct ioswtch ioswtch[] = {
+  {
+    jensen_sethae,
+    jensen_outb, jensen_outw, jensen_outl,
+    jensen_inb, jensen_inw, jensen_inl
+  },
+  {
+    apecs_sethae,
+    apecs_outb, apecs_outw, apecs_outl,
+    apecs_inb, apecs_inw, apecs_inl
+  }
+};
+
+
+static int
+init_iosys (void)
+{
+  char name[256], value[256];
+  FILE * fp;
+  int i;
+
+  fp = fopen (PATH_CPUINFO, "r");
+  if (!fp)
+    return -1;
+
+  while (fscanf (fp, "%256[^:]: %256[^\n]\n", name, value) == 2) {
+    if (strncmp (name, "system type", 11) == 0) {
+      for (i = 0; i < sizeof (platform) / sizeof (platform[0]); ++i) {
+	if (strcmp (platform[i].name, value) == 0) {
+	  fclose (fp);
+	  io.sys = platform[i].io_sys;
+	  if (io.sys == IOSYS_JENSEN)
+	    io.swp = &ioswtch[0];
+	  else
+	    io.swp = &ioswtch[1];
+	  return 0;
+	}
+      }
+    }
+  }
+  fclose (fp);
+  errno = ENODEV;
+  return -1;
+}
+
+
+int
+_ioperm (unsigned long from, unsigned long num, int turn_on)
+{
+  unsigned long addr, len;
+  int prot;
+
+  if (!io.swp && init_iosys () < 0)
+    return -1;
+
+  /* this test isn't as silly as it may look like; consider overflows! */
+  if (from >= MAX_PORT || from + num > MAX_PORT) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  if (turn_on) {
+    if (!io.base) {
+      unsigned long base;
+      int fd;
+
+      io.hae.reg   = 0;		/* not used in user-level */
+      io.hae.cache = 0;
+      __sethae (io.hae.cache);	/* synchronize with hw */
+
+      fd = open ("/dev/mem", O_RDWR);
+      if (fd < 0)
+	return fd;
+
+      switch (io.sys) {
+      case IOSYS_JENSEN:	base = JENSEN_IO_BASE; break;
+      case IOSYS_APECS:		base = APECS_IO_BASE; break;
+      case IOSYS_ALCOR:		base = ALCOR_IO_BASE; break;
+      default:
+	errno = ENODEV;
+	return -1;
+      }
+      addr  = port_to_cpu_addr (from, io.sys, 1);
+      addr &= PAGE_MASK;
+      len = port_to_cpu_addr (MAX_PORT, io.sys, 1) - addr;
+      io.base =
+	  (unsigned long) __mmap (0, len, PROT_NONE, MAP_SHARED, fd, base);
+      close (fd);
+      if ((long) io.base == -1)
+	return -1;
+    }
+    prot = PROT_READ | PROT_WRITE;
+  } else {
+    if (!io.base)
+      return 0;	/* never was turned on... */
+
+    /* turnoff access to relevant pages: */
+    prot = PROT_NONE;
+  }
+  addr  = port_to_cpu_addr (from, io.sys, 1);
+  addr &= PAGE_MASK;
+  len = port_to_cpu_addr (from + num, io.sys, 1) - addr;
+  return mprotect ((void *) addr, len, prot);
+}
+
+
+int
+_iopl (unsigned int level)
+{
+    if (level > 3) {
+	errno = EINVAL;
+	return -1;
+    }
+    if (level) {
+	return _ioperm (0, MAX_PORT, 1);
+    }
+    return 0;
+}
+
+
+void
+_sethae (unsigned long addr)
+{
+  if (!io.swp && init_iosys () < 0)
+    return;
+
+  io.swp->sethae (addr);
+}
+
+
+void
+_outb (unsigned char b, unsigned long port)
+{
+  if (port >= MAX_PORT)
+    return;
+
+  io.swp->outb (b, port);
+}
+
+
+void
+_outw (unsigned short b, unsigned long port)
+{
+  if (port >= MAX_PORT)
+    return;
+
+  io.swp->outw (b, port);
+}
+
+
+void
+_outl (unsigned int b, unsigned long port)
+{
+  if (port >= MAX_PORT)
+    return;
+
+  io.swp->outl (b, port);
+}
+
+
+unsigned int
+_inb (unsigned long port)
+{
+  return io.swp->inb (port);
+}
+
+
+unsigned int
+_inw (unsigned long port)
+{
+  return io.swp->inw (port);
+}
+
+
+unsigned int
+_inl (unsigned long port)
+{
+  return io.swp->inl (port);
+}
+
+
+weak_alias (_sethae, sethae);
+weak_alias (_ioperm, ioperm);
+weak_alias (_iopl, iopl);
+weak_alias (_inb, inb);
+weak_alias (_inw, inw);
+weak_alias (_inl, inl);
+weak_alias (_outb, outb);
+weak_alias (_outw, outw);
+weak_alias (_outl, outl);