Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 201 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/ia64/ioperm.c b/REORG.TODO/sysdeps/unix/sysv/linux/ia64/ioperm.c
new file mode 100644
index 0000000000..daaba28f09
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/ia64/ioperm.c
@@ -0,0 +1,201 @@
+/* Copyright (C) 1999-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* 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 iopl(), 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 4KB page, there are 4 I/O ports.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/mman.h>
+
+#define MAX_PORT	0x10000
+
+/*
+ * Memory fence w/accept.  This should never be used in code that is
+ * not IA-64 specific.
+ */
+#define __ia64_mf_a()	__asm__ __volatile__ ("mf.a" ::: "memory")
+
+static struct
+  {
+    unsigned long int base;
+    unsigned long int page_mask;
+  }
+io;
+
+__inline__ unsigned long int
+io_offset (unsigned long int port)
+{
+	return ((port >> 2) << 12) | (port & 0xfff);
+}
+
+int
+_ioperm (unsigned long int from, unsigned long int num, int turn_on)
+{
+  unsigned long int base;
+
+  /* this test isn't as silly as it may look like; consider overflows! */
+  if (from >= MAX_PORT || from + num > MAX_PORT)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  if (turn_on)
+    {
+      if (!io.base)
+	{
+	  unsigned long phys_io_base, len;
+	  int fd;
+
+	  io.page_mask = ~(__getpagesize() - 1);
+
+	  /* get I/O base physical address from ar.k0 as per PRM: */
+	  __asm__ ("mov %0=ar.k0" : "=r"(phys_io_base));
+
+	  /* The O_SYNC flag tells the /dev/mem driver to map the
+             memory uncached: */
+	  fd = __open ("/dev/mem", O_RDWR | O_SYNC);
+	  if (fd < 0)
+	    return -1;
+
+	  len = io_offset (MAX_PORT);
+	  /* see comment below */
+	  base = (unsigned long int) __mmap (0, len, PROT_READ | PROT_WRITE, MAP_SHARED,
+						fd, phys_io_base);
+	  __close (fd);
+
+	  if ((long) base == -1)
+	    return -1;
+
+	  io.base = base;
+	}
+    }
+  else
+    {
+      if (!io.base)
+	return 0;	/* never was turned on... */
+    }
+
+  /* We can't do mprotect because that would cause us to lose the
+     uncached flag that the /dev/mem driver turned on.  A MAP_UNCACHED
+     flag seems so much cleaner...
+
+     See the history of this file for a version that tried mprotect.  */
+  return 0;
+}
+
+int
+_iopl (unsigned int level)
+{
+  if (level > 3)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+  if (level)
+    {
+      int retval = _ioperm (0, MAX_PORT, 1);
+      /* Match the documented error returns of the x86 version.  */
+      if (retval < 0 && errno == EACCES)
+	__set_errno (EPERM);
+      return retval;
+    }
+  return 0;
+}
+
+unsigned int
+_inb (unsigned long int port)
+{
+  volatile unsigned char *addr = (void *) io.base + io_offset (port);
+  unsigned char ret;
+
+  ret = *addr;
+  __ia64_mf_a();
+  return ret;
+}
+
+unsigned int
+_inw (unsigned long int port)
+{
+  volatile unsigned short *addr = (void *) io.base + io_offset (port);
+  unsigned short ret;
+
+  ret = *addr;
+  __ia64_mf_a();
+  return ret;
+}
+
+unsigned int
+_inl (unsigned long int port)
+{
+  volatile unsigned int *addr = (void *) io.base + io_offset (port);
+  unsigned int ret;
+
+  ret = *addr;
+  __ia64_mf_a();
+  return ret;
+}
+
+void
+_outb (unsigned char val, unsigned long int port)
+{
+  volatile unsigned char *addr = (void *) io.base + io_offset (port);
+
+  *addr = val;
+  __ia64_mf_a();
+}
+
+void
+_outw (unsigned short val, unsigned long int port)
+{
+  volatile unsigned short *addr = (void *) io.base + io_offset (port);
+
+  *addr = val;
+  __ia64_mf_a();
+}
+
+void
+_outl (unsigned int val, unsigned long int port)
+{
+  volatile unsigned int *addr = (void *) io.base + io_offset (port);
+
+  *addr = val;
+  __ia64_mf_a();
+}
+
+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);