diff options
author | Eric Andersen <andersen@codepoet.org> | 2002-11-03 23:18:09 +0000 |
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committer | Eric Andersen <andersen@codepoet.org> | 2002-11-03 23:18:09 +0000 |
commit | 401ee58a1483c226eb4a316c12965ddf224ab438 (patch) | |
tree | dfa2a0d392263c59e3964d4bb61d93b5df91a254 /libc/sysdeps/linux/arm/inout_bwl.c | |
parent | 94314dec1eef25cefca3c19db08aaa9b8c7026c3 (diff) |
A patch from Vincent Sanders to fix the arm implementation of
ioperm() and iopl()
Diffstat (limited to 'libc/sysdeps/linux/arm/inout_bwl.c')
-rw-r--r-- | libc/sysdeps/linux/arm/inout_bwl.c | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/libc/sysdeps/linux/arm/inout_bwl.c b/libc/sysdeps/linux/arm/inout_bwl.c deleted file mode 100644 index 583c77965..000000000 --- a/libc/sysdeps/linux/arm/inout_bwl.c +++ /dev/null @@ -1,87 +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)) - - -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))); -} - |