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 */
66