diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/ioperm.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/ia64/ioperm.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/ioperm.c b/sysdeps/unix/sysv/linux/ia64/ioperm.c deleted file mode 100644 index b4dd8a188e..0000000000 --- a/sysdeps/unix/sysv/linux/ia64/ioperm.c +++ /dev/null @@ -1,200 +0,0 @@ -/* Copyright (C) 1999-2024 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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 - <https://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); |