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/* SPDX-License-Identifier: GPL-2.0-only */ /* * IO definitions for the Hexagon architecture * * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. */ #ifndef _ASM_IO_H #define _ASM_IO_H #include <linux/types.h> #include <asm/page.h> #include <asm/cacheflush.h> extern int remap_area_pages(unsigned long start, unsigned long phys_addr, unsigned long end, unsigned long flags); /* * virt_to_phys - map virtual address to physical * @address: address to map */ static inline unsigned long virt_to_phys(volatile void *address) { return __pa(address); } /* * phys_to_virt - map physical address to virtual * @address: address to map */ static inline void *phys_to_virt(unsigned long address) { return __va(address); } /* * readb - read byte from memory mapped device * @addr: pointer to memory * */ static inline u8 __raw_readb(const volatile void __iomem *addr) { u8 val; asm volatile( "%0 = memb(%1);" : "=&r" (val) : "r" (addr) ); return val; } #define __raw_readb __raw_readb static inline u16 __raw_readw(const volatile void __iomem *addr) { u16 val; asm volatile( "%0 = memh(%1);" : "=&r" (val) : "r" (addr) ); return val; } #define __raw_readw __raw_readw static inline u32 __raw_readl(const volatile void __iomem *addr) { u32 val; asm volatile( "%0 = memw(%1);" : "=&r" (val) : "r" (addr) ); return val; } #define __raw_readl __raw_readl /* * writeb - write a byte to a memory location * @data: data to write to * @addr: pointer to memory * */ static inline void __raw_writeb(u8 data, volatile void __iomem *addr) { asm volatile( "memb(%0) = %1;" : : "r" (addr), "r" (data) : "memory" ); } #define __raw_writeb __raw_writeb static inline void __raw_writew(u16 data, volatile void __iomem *addr) { asm volatile( "memh(%0) = %1;" : : "r" (addr), "r" (data) : "memory" ); } #define __raw_writew __raw_writew static inline void __raw_writel(u32 data, volatile void __iomem *addr) { asm volatile( "memw(%0) = %1;" : : "r" (addr), "r" (data) : "memory" ); } #define __raw_writel __raw_writel /* * I/O memory mapping functions. */ #define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ (__HEXAGON_C_DEV << 6)) /* * These defines are necessary to use the generic io.h for filling in * the missing parts of the API contract. This is because the platform * uses (inline) functions rather than defines and the generic helper * fills in the undefined. */ #define virt_to_phys virt_to_phys #define phys_to_virt phys_to_virt #include <asm-generic/io.h> #endif