127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0+ */
|
||
|
|
/*
|
||
|
|
* IO header file
|
||
|
|
*
|
||
|
|
* Copyright (C) 2001-2007 Tensilica Inc.
|
||
|
|
* Based on the Linux/Xtensa version of this header.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _XTENSA_IO_H
|
||
|
|
#define _XTENSA_IO_H
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <asm/byteorder.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* swap functions to change byte order from little-endian to big-endian and
|
||
|
|
* vice versa.
|
||
|
|
*/
|
||
|
|
|
||
|
|
static inline unsigned short _swapw(unsigned short v)
|
||
|
|
{
|
||
|
|
return (v << 8) | (v >> 8);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline unsigned int _swapl(unsigned int v)
|
||
|
|
{
|
||
|
|
return (v << 24) | ((v & 0xff00) << 8) |
|
||
|
|
((v >> 8) & 0xff00) | (v >> 24);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Generic I/O
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define readb(addr) \
|
||
|
|
({ unsigned char __v = (*(volatile unsigned char *)(addr)); __v; })
|
||
|
|
#define readw(addr) \
|
||
|
|
({ unsigned short __v = (*(volatile unsigned short *)(addr)); __v; })
|
||
|
|
#define readl(addr) \
|
||
|
|
({ unsigned int __v = (*(volatile unsigned int *)(addr)); __v; })
|
||
|
|
#define writeb(b, addr) (void)((*(volatile unsigned char *)(addr)) = (b))
|
||
|
|
#define writew(b, addr) (void)((*(volatile unsigned short *)(addr)) = (b))
|
||
|
|
#define writel(b, addr) (void)((*(volatile unsigned int *)(addr)) = (b))
|
||
|
|
|
||
|
|
#define __raw_readb readb
|
||
|
|
#define __raw_readw readw
|
||
|
|
#define __raw_readl readl
|
||
|
|
#define __raw_writeb writeb
|
||
|
|
#define __raw_writew writew
|
||
|
|
#define __raw_writel writel
|
||
|
|
|
||
|
|
/* These are the definitions for the x86 IO instructions
|
||
|
|
* inb/inw/inl/outb/outw/outl, the "string" versions
|
||
|
|
* insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
|
||
|
|
* inb_p/inw_p/...
|
||
|
|
* The macros don't do byte-swapping.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define inb(port) readb((u8 *)((port)))
|
||
|
|
#define outb(val, port) writeb((val), (u8 *)((unsigned long)(port)))
|
||
|
|
#define inw(port) readw((u16 *)((port)))
|
||
|
|
#define outw(val, port) writew((val), (u16 *)((unsigned long)(port)))
|
||
|
|
#define inl(port) readl((u32 *)((port)))
|
||
|
|
#define outl(val, port) writel((val), (u32 *)((unsigned long)(port)))
|
||
|
|
|
||
|
|
#define inb_p(port) inb((port))
|
||
|
|
#define outb_p(val, port) outb((val), (port))
|
||
|
|
#define inw_p(port) inw((port))
|
||
|
|
#define outw_p(val, port) outw((val), (port))
|
||
|
|
#define inl_p(port) inl((port))
|
||
|
|
#define outl_p(val, port) outl((val), (port))
|
||
|
|
|
||
|
|
void insb(unsigned long port, void *dst, unsigned long count);
|
||
|
|
void insw(unsigned long port, void *dst, unsigned long count);
|
||
|
|
void insl(unsigned long port, void *dst, unsigned long count);
|
||
|
|
void outsb(unsigned long port, const void *src, unsigned long count);
|
||
|
|
void outsw(unsigned long port, const void *src, unsigned long count);
|
||
|
|
void outsl(unsigned long port, const void *src, unsigned long count);
|
||
|
|
|
||
|
|
#define IO_SPACE_LIMIT ~0
|
||
|
|
|
||
|
|
#define memset_io(a, b, c) memset((void *)(a), (b), (c))
|
||
|
|
#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
|
||
|
|
#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
|
||
|
|
|
||
|
|
/* At this point the Xtensa doesn't provide byte swap instructions */
|
||
|
|
|
||
|
|
#ifdef __XTENSA_EB__
|
||
|
|
# define in_8(addr) (*(u8 *)(addr))
|
||
|
|
# define in_le16(addr) _swapw(*(u16 *)(addr))
|
||
|
|
# define in_le32(addr) _swapl(*(u32 *)(addr))
|
||
|
|
# define out_8(b, addr) *(u8 *)(addr) = (b)
|
||
|
|
# define out_le16(b, addr) *(u16 *)(addr) = _swapw(b)
|
||
|
|
# define out_le32(b, addr) *(u32 *)(addr) = _swapl(b)
|
||
|
|
#elif defined(__XTENSA_EL__)
|
||
|
|
# define in_8(addr) (*(u8 *)(addr))
|
||
|
|
# define in_le16(addr) (*(u16 *)(addr))
|
||
|
|
# define in_le32(addr) (*(u32 *)(addr))
|
||
|
|
# define out_8(b, addr) *(u8 *)(addr) = (b)
|
||
|
|
# define out_le16(b, addr) *(u16 *)(addr) = (b)
|
||
|
|
# define out_le32(b, addr) *(u32 *)(addr) = (b)
|
||
|
|
#else
|
||
|
|
# error processor byte order undefined!
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Convert a physical pointer to a virtual kernel pointer for /dev/mem access
|
||
|
|
*/
|
||
|
|
#define xlate_dev_mem_ptr(p) __va(p)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Convert a virtual cached pointer to an uncached pointer
|
||
|
|
*/
|
||
|
|
#define xlate_dev_kmem_ptr(p) p
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Dummy function to keep U-Boot's cfi_flash.c driver happy.
|
||
|
|
*/
|
||
|
|
static inline void sync(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#include <asm-generic/io.h>
|
||
|
|
|
||
|
|
#endif /* _XTENSA_IO_H */
|