| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp. |
| 4 | * <benh@kernel.crashing.org> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #ifndef _ASM_POWERPC_DCR_MMIO_H |
| 8 | #define _ASM_POWERPC_DCR_MMIO_H |
| 9 | #ifdef __KERNEL__ |
| 10 | |
| 11 | #include <asm/io.h> |
| 12 | |
| 13 | typedef struct { |
| 14 | void __iomem *token; |
| 15 | unsigned int stride; |
| 16 | unsigned int base; |
| 17 | } dcr_host_mmio_t; |
| 18 | |
| 19 | static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host) |
| 20 | { |
| 21 | return host.token != NULL; |
| 22 | } |
| 23 | |
| 24 | extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev, |
| 25 | unsigned int dcr_n, |
| 26 | unsigned int dcr_c); |
| 27 | extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c); |
| 28 | |
| 29 | static inline u32 dcr_read_mmio(dcr_host_mmio_t host, unsigned int dcr_n) |
| 30 | { |
| 31 | return in_be32(host.token + ((host.base + dcr_n) * host.stride)); |
| 32 | } |
| 33 | |
| 34 | static inline void dcr_write_mmio(dcr_host_mmio_t host, |
| 35 | unsigned int dcr_n, |
| 36 | u32 value) |
| 37 | { |
| 38 | out_be32(host.token + ((host.base + dcr_n) * host.stride), value); |
| 39 | } |
| 40 | |
| 41 | #endif /* __KERNEL__ */ |
| 42 | #endif /* _ASM_POWERPC_DCR_MMIO_H */ |
| 43 | |
| 44 | |