LXR linux/arch/powerpc/include/asm/dcr.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_H
   8#define _ASM_POWERPC_DCR_H
   9#ifdef __KERNEL__
  10#ifndef __ASSEMBLY__
  11#ifdef CONFIG_PPC_DCR
  12
  13#ifdef CONFIG_PPC_DCR_NATIVE
  14#include <asm/dcr-native.h>
  15#endif
  16
  17#ifdef CONFIG_PPC_DCR_MMIO
  18#include <asm/dcr-mmio.h>
  19#endif
  20
  21
  22/* Indirection layer for providing both NATIVE and MMIO support. */
  23
  24#if defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO)
  25
  26#include <asm/dcr-generic.h>
  27
  28#define DCR_MAP_OK(host)        dcr_map_ok_generic(host)
  29#define dcr_map(dev, dcr_n, dcr_c) dcr_map_generic(dev, dcr_n, dcr_c)
  30#define dcr_unmap(host, dcr_c) dcr_unmap_generic(host, dcr_c)
  31#define dcr_read(host, dcr_n) dcr_read_generic(host, dcr_n)
  32#define dcr_write(host, dcr_n, value) dcr_write_generic(host, dcr_n, value)
  33
  34#else
  35
  36#ifdef CONFIG_PPC_DCR_NATIVE
  37typedef dcr_host_native_t dcr_host_t;
  38#define DCR_MAP_OK(host)        dcr_map_ok_native(host)
  39#define dcr_map(dev, dcr_n, dcr_c) dcr_map_native(dev, dcr_n, dcr_c)
  40#define dcr_unmap(host, dcr_c) dcr_unmap_native(host, dcr_c)
  41#define dcr_read(host, dcr_n) dcr_read_native(host, dcr_n)
  42#define dcr_write(host, dcr_n, value) dcr_write_native(host, dcr_n, value)
  43#else
  44typedef dcr_host_mmio_t dcr_host_t;
  45#define DCR_MAP_OK(host)        dcr_map_ok_mmio(host)
  46#define dcr_map(dev, dcr_n, dcr_c) dcr_map_mmio(dev, dcr_n, dcr_c)
  47#define dcr_unmap(host, dcr_c) dcr_unmap_mmio(host, dcr_c)
  48#define dcr_read(host, dcr_n) dcr_read_mmio(host, dcr_n)
  49#define dcr_write(host, dcr_n, value) dcr_write_mmio(host, dcr_n, value)
  50#endif
  51
  52#endif /* defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO) */
  53
  54/*
  55 * additional helpers to read the DCR * base from the device-tree
  56 */
  57struct device_node;
  58extern unsigned int dcr_resource_start(const struct device_node *np,
  59                                       unsigned int index);
  60extern unsigned int dcr_resource_len(const struct device_node *np,
  61                                     unsigned int index);
  62#endif /* CONFIG_PPC_DCR */
  63#endif /* __ASSEMBLY__ */
  64#endif /* __KERNEL__ */
  65#endif /* _ASM_POWERPC_DCR_H */
  66