LXR linux/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
  12enum host_type_t {DCR_HOST_MMIO, DCR_HOST_NATIVE, DCR_HOST_INVALID};
  13
  14typedef 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
  22extern bool dcr_map_ok_generic(dcr_host_t host);
  23
  24extern dcr_host_t dcr_map_generic(struct device_node *dev, unsigned int dcr_n,
  25                          unsigned int dcr_c);
  26extern void dcr_unmap_generic(dcr_host_t host, unsigned int dcr_c);
  27
  28extern u32 dcr_read_generic(dcr_host_t host, unsigned int dcr_n);
  29
  30extern 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
  37