payloads/libpayload/drivers/pci_io_ops.c

   1 /*
   2  *
   3  * Copyright (C) 2008 Advanced Micro Devices, Inc.
   4  * Copyright (C) 2008 coresystems GmbH
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <libpayload.h>
  31 #include <pci.h>
  32
  33 u8 pci_read_config8(pcidev_t dev, u16 reg)
  34 {
  35         outl(dev | (reg & ~3), 0xCF8);
  36         return inb(0xCFC + (reg & 3));
  37 }
  38
  39 u16 pci_read_config16(pcidev_t dev, u16 reg)
  40 {
  41         outl(dev | (reg & ~3), 0xCF8);
  42         return inw(0xCFC + (reg & 3));
  43 }
  44
  45 u32 pci_read_config32(pcidev_t dev, u16 reg)
  46 {
  47         outl(dev | (reg & ~3), 0xCF8);
  48         return inl(0xCFC + (reg & 3));
  49 }
  50
  51 void pci_write_config8(pcidev_t dev, u16 reg, u8 val)
  52 {
  53         outl(dev | (reg & ~3), 0xCF8);
  54         outb(val, 0xCFC + (reg & 3));
  55 }
  56
  57 void pci_write_config16(pcidev_t dev, u16 reg, u16 val)
  58 {
  59         outl(dev | (reg & ~3), 0xCF8);
  60         outw(val, 0xCFC + (reg & 3));
  61 }
  62
  63 void pci_write_config32(pcidev_t dev, u16 reg, u32 val)
  64 {
  65         outl(dev | (reg & ~3), 0xCF8);
  66         outl(val, 0xCFC + (reg & 3));
  67 }