LXR linux/arch/powerpc/include/asm/dcr.h

   1/*
   2 * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
   3 *                    <benh@kernel.crashing.org>
   4 *
   5 *   This program is free software;  you can redistribute it and/or modify
   6 *   it under the terms of the GNU General Public License as published by
   7 *   the Free Software Foundation; either version 2 of the License, or
   8 *   (at your option) any later version.
   9 *
  10 *   This program is distributed in the hope that it will be useful,
  11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13 *   the GNU General Public License for more details.
  14 *
  15 *   You should have received a copy of the GNU General Public License
  16 *   along with this program;  if not, write to the Free Software
  17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18 */
  19
  20#ifndef _ASM_POWERPC_DCR_H
  21#define _ASM_POWERPC_DCR_H
  22#ifdef __KERNEL__
  23#ifndef __ASSEMBLY__
  24#ifdef CONFIG_PPC_DCR
  25
  26#ifdef CONFIG_PPC_DCR_NATIVE
  27#include <asm/dcr-native.h>
  28#endif
  29
  30#ifdef CONFIG_PPC_DCR_MMIO
  31#include <asm/dcr-mmio.h>
  32#endif
  33
  34
  35/* Indirection layer for providing both NATIVE and MMIO support. */
  36
  37#if defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO)
  38
  39#include <asm/dcr-generic.h>
  40
  41#define DCR_MAP_OK(host)        dcr_map_ok_generic(host)
  42#define dcr_map(dev, dcr_n, dcr_c) dcr_map_generic(dev, dcr_n, dcr_c)
  43#define dcr_unmap(host, dcr_c) dcr_unmap_generic(host, dcr_c)
  44#define dcr_read(host, dcr_n) dcr_read_generic(host, dcr_n)
  45#define dcr_write(host, dcr_n, value) dcr_write_generic(host, dcr_n, value)
  46
  47#else
  48
  49#ifdef CONFIG_PPC_DCR_NATIVE
  50typedef dcr_host_native_t dcr_host_t;
  51#define DCR_MAP_OK(host)        dcr_map_ok_native(host)
  52#define dcr_map(dev, dcr_n, dcr_c) dcr_map_native(dev, dcr_n, dcr_c)
  53#define dcr_unmap(host, dcr_c) dcr_unmap_native(host, dcr_c)
  54#define dcr_read(host, dcr_n) dcr_read_native(host, dcr_n)
  55#define dcr_write(host, dcr_n, value) dcr_write_native(host, dcr_n, value)
  56#else
  57typedef dcr_host_mmio_t dcr_host_t;
  58#define DCR_MAP_OK(host)        dcr_map_ok_mmio(host)
  59#define dcr_map(dev, dcr_n, dcr_c) dcr_map_mmio(dev, dcr_n, dcr_c)
  60#define dcr_unmap(host, dcr_c) dcr_unmap_mmio(host, dcr_c)
  61#define dcr_read(host, dcr_n) dcr_read_mmio(host, dcr_n)
  62#define dcr_write(host, dcr_n, value) dcr_write_mmio(host, dcr_n, value)
  63#endif
  64
  65#endif /* defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO) */
  66
  67/*
  68 * additional helpers to read the DCR * base from the device-tree
  69 */
  70struct device_node;
  71extern unsigned int dcr_resource_start(const struct device_node *np,
  72                                       unsigned int index);
  73extern unsigned int dcr_resource_len(const struct device_node *np,
  74                                     unsigned int index);
  75#endif /* CONFIG_PPC_DCR */
  76#endif /* __ASSEMBLY__ */
  77#endif /* __KERNEL__ */
  78#endif /* _ASM_POWERPC_DCR_H */
  79