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