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
  50 typedef 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
  57 typedef 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  */
  70 struct device_node;
  71 extern unsigned int dcr_resource_start(const struct device_node *np,
  72                                        unsigned int index);
  73 extern 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 */