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authorUlrich Drepper <drepper@redhat.com>2000-06-29 19:33:05 +0000
committerUlrich Drepper <drepper@redhat.com>2000-06-29 19:33:05 +0000
commita5707dad25fcc5093f9cc220226b142fae471718 (patch)
tree79e77e2376db710bf935386e584f6107e207cbe0 /sysdeps/unix/sysv/linux/ia64/ioperm.c
parent5ab0176021b51b2815ec44cc42ec8b82c6d6d0f2 (diff)
downloadglibc-a5707dad25fcc5093f9cc220226b142fae471718.tar.gz
Update.
2000-06-29 Ulrich Drepper <drepper@redhat.com> * stdio-common/printf_fp.c (__printf_fp): Don't clobber pointer which we later need to calling free(). Patch by Matt Wilson <msw@redhat.com>. 2000-06-27 David Mosberger-Tang <davidm@hpl.hp.com> * sysdeps/unix/sysv/linux/ia64/bits/ipc.h: New file. * sysdeps/unix/sysv/linux/ia64/bits/shm.h: New file. 2000-06-28 Jes Sorensen <jes@linuxcare.com> * sysdeps/ieee754/dbl-64/s_exp2.c: Add include stdlib.h to get prototype for abs(). * sysdeps/ieee754/flt-32/s_exp2f.c: ditto.
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/ioperm.c')
-rw-r--r--sysdeps/unix/sysv/linux/ia64/ioperm.c211
1 files changed, 211 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/ioperm.c b/sysdeps/unix/sysv/linux/ia64/ioperm.c
new file mode 100644
index 0000000000..abe8fea4af
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/ioperm.c
@@ -0,0 +1,211 @@
+/* Copyright (C) 1999, 2000 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 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, 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 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>
+
+#include <asm/page.h>
+#include <asm/system.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 addr, len, base;
+ int prot;
+
+ /* 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);
+#if 1
+ /* see comment below */
+ base = (unsigned long int) __mmap (0, len, PROT_READ | PROT_WRITE, MAP_SHARED,
+ fd, phys_io_base);
+#else
+ base = (unsigned long int) __mmap (0, len, PROT_NONE, MAP_SHARED,
+ fd, phys_io_base);
+#endif
+ close (fd);
+
+ if ((long) base == -1)
+ return -1;
+
+ io.base = base;
+ }
+ prot = PROT_READ | PROT_WRITE;
+ }
+ else
+ {
+ if (!io.base)
+ return 0; /* never was turned on... */
+
+ prot = PROT_NONE;
+ }
+#if 0
+ /* 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... */
+ addr = (io.base + io_offset (from)) & io.page_mask;
+ len = io.base + io_offset (from + num) - addr;
+ return mprotect ((void *) addr, len, prot);
+#else
+ return 0;
+#endif
+}
+
+int
+_iopl (unsigned int level)
+{
+ if (level > 3)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+ if (level)
+ return _ioperm (0, MAX_PORT, 1);
+ 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);