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
  37 typedef 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
  44 typedef 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  */
  57 struct device_node;
  58 extern unsigned int dcr_resource_start(const struct device_node *np,
  59                                        unsigned int index);
  60 extern 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 */