1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
4*4882a593Smuzhiyun * <benh@kernel.crashing.org>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifndef _ASM_POWERPC_DCR_MMIO_H
8*4882a593Smuzhiyun #define _ASM_POWERPC_DCR_MMIO_H
9*4882a593Smuzhiyun #ifdef __KERNEL__
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <asm/io.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun typedef struct {
14*4882a593Smuzhiyun void __iomem *token;
15*4882a593Smuzhiyun unsigned int stride;
16*4882a593Smuzhiyun unsigned int base;
17*4882a593Smuzhiyun } dcr_host_mmio_t;
18*4882a593Smuzhiyun
dcr_map_ok_mmio(dcr_host_mmio_t host)19*4882a593Smuzhiyun static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun return host.token != NULL;
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev,
25*4882a593Smuzhiyun unsigned int dcr_n,
26*4882a593Smuzhiyun unsigned int dcr_c);
27*4882a593Smuzhiyun extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c);
28*4882a593Smuzhiyun
dcr_read_mmio(dcr_host_mmio_t host,unsigned int dcr_n)29*4882a593Smuzhiyun static inline u32 dcr_read_mmio(dcr_host_mmio_t host, unsigned int dcr_n)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun return in_be32(host.token + ((host.base + dcr_n) * host.stride));
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
dcr_write_mmio(dcr_host_mmio_t host,unsigned int dcr_n,u32 value)34*4882a593Smuzhiyun static inline void dcr_write_mmio(dcr_host_mmio_t host,
35*4882a593Smuzhiyun unsigned int dcr_n,
36*4882a593Smuzhiyun u32 value)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun out_be32(host.token + ((host.base + dcr_n) * host.stride), value);
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun #endif /* __KERNEL__ */
42*4882a593Smuzhiyun #endif /* _ASM_POWERPC_DCR_MMIO_H */
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun
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