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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
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