arch/powerpc/include/asm/dcr-generic.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
   4  *                    <benh@kernel.crashing.org>
   5  */
   6
   7 #ifndef _ASM_POWERPC_DCR_GENERIC_H
   8 #define _ASM_POWERPC_DCR_GENERIC_H
   9 #ifdef __KERNEL__
  10 #ifndef __ASSEMBLY__
  11
  12 enum host_type_t {DCR_HOST_MMIO, DCR_HOST_NATIVE, DCR_HOST_INVALID};
  13
  14 typedef struct {
  15         enum host_type_t type;
  16         union {
  17                 dcr_host_mmio_t mmio;
  18                 dcr_host_native_t native;
  19         } host;
  20 } dcr_host_t;
  21
  22 extern bool dcr_map_ok_generic(dcr_host_t host);
  23
  24 extern dcr_host_t dcr_map_generic(struct device_node *dev, unsigned int dcr_n,
  25                           unsigned int dcr_c);
  26 extern void dcr_unmap_generic(dcr_host_t host, unsigned int dcr_c);
  27
  28 extern u32 dcr_read_generic(dcr_host_t host, unsigned int dcr_n);
  29
  30 extern void dcr_write_generic(dcr_host_t host, unsigned int dcr_n, u32 value);
  31
  32 #endif /* __ASSEMBLY__ */
  33 #endif /* __KERNEL__ */
  34 #endif /* _ASM_POWERPC_DCR_GENERIC_H */
  35
  36