| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp. |
| * <benh@kernel.crashing.org> |
| */ |
| |
| #ifndef _ASM_POWERPC_DCR_MMIO_H |
| #define _ASM_POWERPC_DCR_MMIO_H |
| #ifdef __KERNEL__ |
| |
| #include <asm/io.h> |
| |
| typedef struct { |
| void __iomem *token; |
| unsigned int stride; |
| unsigned int base; |
| } dcr_host_mmio_t; |
| |
| static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host) |
| { |
| return host.token != NULL; |
| } |
| |
| extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev, |
| unsigned int dcr_n, |
| unsigned int dcr_c); |
| extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c); |
| |
| static inline u32 dcr_read_mmio(dcr_host_mmio_t host, unsigned int dcr_n) |
| { |
| return in_be32(host.token + ((host.base + dcr_n) * host.stride)); |
| } |
| |
| static inline void dcr_write_mmio(dcr_host_mmio_t host, |
| unsigned int dcr_n, |
| u32 value) |
| { |
| out_be32(host.token + ((host.base + dcr_n) * host.stride), value); |
| } |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_DCR_MMIO_H */ |
| |
| |
