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/*
* IO header file
*
* Copyright (C) 2001-2007 Tensilica Inc.
* Based on the Linux/Xtensa version of this header.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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
#define MAP_NOCACHE (0)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
return (void *)paddr;
}
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}
static inline phys_addr_t virt_to_phys(void *vaddr)
{
return (phys_addr_t)((unsigned long)vaddr);
}
/*
* Dummy function to keep U-Boot's cfi_flash.c driver happy.
*/
static inline void sync(void)
{
}
#endif /* _XTENSA_IO_H */
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