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/*
* Originally imported from linux/include/asm-arm/io.h. This file has changed
* substantially since then.
*
* Copyright 2013 Google Inc.
* Copyright (C) 1996-2000 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Modifications:
* 08-Apr-2013 G Replaced several macros with inlines for type safety.
* 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
* constant addresses and variable addresses.
* 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture
* specific IO header files.
* 27-Mar-1999 PJB Second parameter of memcpy_toio is const..
* 04-Apr-1999 PJB Added check_signature.
* 12-Dec-1999 RMK More cleanups
* 18-Jun-2000 RMK Removed virt_to_* and friends definitions
*/
#ifndef __ASM_ARM_IO_H
#define __ASM_ARM_IO_H
#include <types.h>
#include <arch/cache.h> /* for dmb() */
#include <arch/byteorder.h>
static inline uint8_t read8(const void *addr)
{
dmb();
return *(volatile uint8_t *)addr;
}
static inline uint16_t read16(const void *addr)
{
dmb();
return *(volatile uint16_t *)addr;
}
static inline uint32_t read32(const void *addr)
{
dmb();
return *(volatile uint32_t *)addr;
}
static inline void write8(uint8_t val, const void *addr)
{
dmb();
*(volatile uint8_t *)addr = val;
dmb();
}
static inline void write16(uint16_t val, const void *addr)
{
dmb();
*(volatile uint16_t *)addr = val;
dmb();
}
static inline void write32(uint32_t val, const void *addr)
{
dmb();
*(volatile uint32_t *)addr = val;
dmb();
}
/*
* FIXME: These are to avoid breaking existing ARM code. We should eventually
* re-factor all code to specify the data length intended.
*/
#define readb(a) read8(a)
#define writeb(v,a) write8(v,a)
#define readl(a) read32(a)
#define writel(v,a) write32(v,a)
/*
* Clear and set bits in one shot. These macros can be used to clear and
* set multiple bits in a register using a single call. These macros can
* also be used to set a multiple-bit bit pattern using a mask, by
* specifying the mask in the 'clear' parameter and the new bit pattern
* in the 'set' parameter.
*/
#define out_arch(type,endian,a,v) write##type(cpu_to_##endian(v),a)
#define in_arch(type,endian,a) endian##_to_cpu(read##type(a))
#define out_le32(a,v) out_arch(l,le32,a,v)
#define out_le16(a,v) out_arch(w,le16,a,v)
#define in_le32(a) in_arch(l,le32,a)
#define in_le16(a) in_arch(w,le16,a)
#define out_be32(a,v) out_arch(l,be32,a,v)
#define out_be16(a,v) out_arch(w,be16,a,v)
#define in_be32(a) in_arch(l,be32,a)
#define in_be16(a) in_arch(w,be16,a)
#define out_8(a,v) writeb(v,a)
#define in_8(a) readb(a)
#define clrbits(type, addr, clear) \
out_##type((addr), in_##type(addr) & ~(clear))
#define setbits(type, addr, set) \
out_##type((addr), in_##type(addr) | (set))
#define clrsetbits(type, addr, clear, set) \
out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
#define setbits_be32(addr, set) setbits(be32, addr, set)
#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
#define setbits_le32(addr, set) setbits(le32, addr, set)
#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
#define setbits_be16(addr, set) setbits(be16, addr, set)
#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
#define setbits_le16(addr, set) setbits(le16, addr, set)
#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
#define clrbits_8(addr, clear) clrbits(8, addr, clear)
#define setbits_8(addr, set) setbits(8, addr, set)
#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
#endif /* __ASM_ARM_IO_H */
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