arch/powerpc/include/asm/dcr-generic.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_GENERIC_H
  21 #define _ASM_POWERPC_DCR_GENERIC_H
  22 #ifdef __KERNEL__
  23 #ifndef __ASSEMBLY__
  24
  25 enum host_type_t {DCR_HOST_MMIO, DCR_HOST_NATIVE, DCR_HOST_INVALID};
  26
  27 typedef struct {
  28         enum host_type_t type;
  29         union {
  30                 dcr_host_mmio_t mmio;
  31                 dcr_host_native_t native;
  32         } host;
  33 } dcr_host_t;
  34
  35 extern bool dcr_map_ok_generic(dcr_host_t host);
  36
  37 extern dcr_host_t dcr_map_generic(struct device_node *dev, unsigned int dcr_n,
  38                           unsigned int dcr_c);
  39 extern void dcr_unmap_generic(dcr_host_t host, unsigned int dcr_c);
  40
  41 extern u32 dcr_read_generic(dcr_host_t host, unsigned int dcr_n);
  42
  43 extern void dcr_write_generic(dcr_host_t host, unsigned int dcr_n, u32 value);
  44
  45 #endif /* __ASSEMBLY__ */
  46 #endif /* __KERNEL__ */
  47 #endif /* _ASM_POWERPC_DCR_GENERIC_H */
  48
  49