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Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/ioperm.c')
-rw-r--r--sysdeps/unix/sysv/linux/arm/ioperm.c274
1 files changed, 0 insertions, 274 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/ioperm.c b/sysdeps/unix/sysv/linux/arm/ioperm.c
deleted file mode 100644
index 558b485b61..0000000000
--- a/sysdeps/unix/sysv/linux/arm/ioperm.c
+++ /dev/null
@@ -1,274 +0,0 @@
-/* Copyright (C) 1998, 1999, 2003 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 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, 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/mman.h>
-
-#include <asm/page.h>
-#include <sys/sysctl.h>
-
-#define PATH_ARM_SYSTYPE "/etc/arm_systype"
-#define PATH_CPUINFO "/proc/cpuinfo"
-
-#define MAX_PORT 0x10000
-
-static struct {
- unsigned long int base;
- unsigned long int io_base;
- unsigned int shift;
- unsigned int initdone; /* since all the above could be 0 */
-} io;
-
-#define IO_BASE_FOOTBRIDGE 0x7c000000
-#define IO_SHIFT_FOOTBRIDGE 0
-
-static struct platform {
- const char *name;
- unsigned long int io_base;
- unsigned int shift;
-} platform[] = {
- /* All currently supported platforms are in fact the same. :-) */
- {"Chalice-CATS", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE},
- {"DEC-EBSA285", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE},
- {"Corel-NetWinder", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE},
- {"Rebel-NetWinder", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE},
-};
-
-#define IO_ADDR(port) (io.base + ((port) << io.shift))
-
-/*
- * Initialize I/O system. There are several ways to get the information
- * we need. Each is tried in turn until one succeeds.
- *
- * 1. Sysctl (CTL_BUS, BUS_ISA, ISA_*). This is the preferred method
- * but not all kernels support it.
- *
- * 2. Read the value (not the contents) of symlink PATH_ARM_SYSTYPE.
- * - If it matches one of the entries in the table above, use the
- * corresponding values.
- * - If it begins with a number, assume this is a previously
- * unsupported system and the values encode, in order,
- * "<io_base>,<port_shift>".
- *
- * 3. Lookup the "system type" field in /proc/cpuinfo. Again, if it
- * matches an entry in the platform[] table, use the corresponding
- * values.
- */
-
-static int
-init_iosys (void)
-{
- char systype[256];
- int i, n;
- static int iobase_name[] = { CTL_BUS, BUS_ISA, BUS_ISA_PORT_BASE };
- static int ioshift_name[] = { CTL_BUS, BUS_ISA, BUS_ISA_PORT_SHIFT };
- size_t len = sizeof(io.base);
-
- if (! sysctl (iobase_name, 3, &io.io_base, &len, NULL, 0)
- && ! sysctl (ioshift_name, 3, &io.shift, &len, NULL, 0))
- {
- io.initdone = 1;
- return 0;
- }
-
- n = readlink (PATH_ARM_SYSTYPE, systype, sizeof (systype) - 1);
- if (n > 0)
- {
- systype[n] = '\0';
- if (isdigit (systype[0]))
- {
- if (sscanf (systype, "%li,%i", &io.io_base, &io.shift) == 2)
- {
- io.initdone = 1;
- return 0;
- }
- /* else we're likely going to fail with the system match below */
- }
- }
- else
- {
- FILE * fp;
-
- fp = fopen (PATH_CPUINFO, "r");
- if (! fp)
- return -1;
- while ((n = fscanf (fp, "Hardware\t: %256[^\n]\n", systype))
- != EOF)
- {
- if (n == 1)
- break;
- else
- fgets (systype, 256, fp);
- }
- fclose (fp);
-
- if (n == EOF)
- {
- /* this can happen if the format of /proc/cpuinfo changes... */
- fprintf (stderr,
- "ioperm: Unable to determine system type.\n"
- "\t(May need " PATH_ARM_SYSTYPE " symlink?)\n");
- __set_errno (ENODEV);
- return -1;
- }
- }
-
- /* translate systype name into i/o system: */
- for (i = 0; i < sizeof (platform) / sizeof (platform[0]); ++i)
- {
- if (strcmp (platform[i].name, systype) == 0)
- {
- io.shift = platform[i].shift;
- io.io_base = platform[i].io_base;
- io.initdone = 1;
- return 0;
- }
- }
-
- /* systype is not a known platform name... */
- __set_errno (ENODEV);
- return -1;
-}
-
-int
-_ioperm (unsigned long int from, unsigned long int num, int turn_on)
-{
- if (! io.initdone && 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)
- {
- __set_errno (EINVAL);
- return -1;
- }
-
- if (turn_on)
- {
- if (! io.base)
- {
- int fd;
-
- fd = open ("/dev/mem", O_RDWR);
- if (fd < 0)
- return -1;
-
- io.base =
- (unsigned long int) __mmap (0, MAX_PORT << io.shift,
- PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, io.io_base);
- close (fd);
- if ((long) io.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)));
-}
-
-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);