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Diffstat (limited to 'libc/sysdeps/linux/arm/ioperm.c')
-rw-r--r--libc/sysdeps/linux/arm/ioperm.c129
1 files changed, 0 insertions, 129 deletions
diff --git a/libc/sysdeps/linux/arm/ioperm.c b/libc/sysdeps/linux/arm/ioperm.c
deleted file mode 100644
index bd935600c..000000000
--- a/libc/sysdeps/linux/arm/ioperm.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Phil Blundell, based on the Alpha version 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-/* I/O port access on the ARM is something of a fiction. What we do is to
- map an appropriate area of /dev/mem into user space so that a program
- can blast away at the hardware in such a way as to generate I/O cycles
- on the bus. To insulate user code from dependencies on particular
- hardware we don't allow calls to inb() and friends to be inlined, but
- force them to come through code in here every time. Performance-critical
- registers tend to be memory mapped these days so this should be no big
- problem. */
-
-/* Once upon a time this file used mprotect to enable and disable
- access to particular areas of I/O space. Unfortunately the
- mprotect syscall also has the side effect of enabling caching for
- the area affected (this is a kernel limitation). So we now just
- enable all the ports all of the time. */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-
-
-#define IO_BASE 0x7c000000
-#define IO_SHIFT 0
-#define IO_ADDR(port) (IO_BASE + ((port) << IO_SHIFT))
-
-
-#define MAX_PORT 0x10000
-int ioperm(unsigned long int from, unsigned long int num, int turn_on)
-{
- /* 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)
- {
- int fd;
- unsigned long int base;
-
- fd = open ("/dev/mem", O_RDWR);
- if (fd < 0)
- return -1;
-
- base = (unsigned long int) mmap (0, MAX_PORT << IO_SHIFT,
- PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, IO_BASE);
- close (fd);
- if ((long) base == -1)
- return -1;
- }
-
- return 0;
-}
-
-
-int iopl (unsigned int level)
-{
- if (level > 3) {
- __set_errno (EINVAL);
- return -1;
- }
- if (level) {
- return ioperm (0, MAX_PORT, 1);
- }
- return 0;
-}
-
-void outb (unsigned char b, unsigned long int port)
-{
- *((volatile unsigned char *)(IO_ADDR (port))) = b;
-}
-
-
-void outw (unsigned short b, unsigned long int port)
-{
- *((volatile unsigned short *)(IO_ADDR (port))) = b;
-}
-
-
-void outl (unsigned int b, unsigned long int port)
-{
- *((volatile unsigned long *)(IO_ADDR (port))) = b;
-}
-
-
-unsigned int inb (unsigned long int port)
-{
- return *((volatile unsigned char *)(IO_ADDR (port)));
-}
-
-
-unsigned int inw (unsigned long int port)
-{
- return *((volatile unsigned short *)(IO_ADDR (port)));
-}
-
-
-unsigned int inl (unsigned long int port)
-{
- return *((volatile unsigned long *)(IO_ADDR (port)));
-}
-