1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* 3 * IO header file 4 * 5 * Copyright (C) 2001-2007 Tensilica Inc. 6 * Based on the Linux/Xtensa version of this header. 7 */ 8 9#ifndef _XTENSA_IO_H 10#define _XTENSA_IO_H 11 12#include <linux/types.h> 13#include <asm/byteorder.h> 14 15/* 16 * swap functions to change byte order from little-endian to big-endian and 17 * vice versa. 18 */ 19 20static inline unsigned short _swapw(unsigned short v) 21{ 22 return (v << 8) | (v >> 8); 23} 24 25static inline unsigned int _swapl(unsigned int v) 26{ 27 return (v << 24) | ((v & 0xff00) << 8) | 28 ((v >> 8) & 0xff00) | (v >> 24); 29} 30 31/* 32 * Generic I/O 33 */ 34 35#define readb(addr) \ 36 ({ unsigned char __v = (*(volatile unsigned char *)(addr)); __v; }) 37#define readw(addr) \ 38 ({ unsigned short __v = (*(volatile unsigned short *)(addr)); __v; }) 39#define readl(addr) \ 40 ({ unsigned int __v = (*(volatile unsigned int *)(addr)); __v; }) 41#define writeb(b, addr) (void)((*(volatile unsigned char *)(addr)) = (b)) 42#define writew(b, addr) (void)((*(volatile unsigned short *)(addr)) = (b)) 43#define writel(b, addr) (void)((*(volatile unsigned int *)(addr)) = (b)) 44 45#define __raw_readb readb 46#define __raw_readw readw 47#define __raw_readl readl 48#define __raw_writeb writeb 49#define __raw_writew writew 50#define __raw_writel writel 51 52/* These are the definitions for the x86 IO instructions 53 * inb/inw/inl/outb/outw/outl, the "string" versions 54 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions 55 * inb_p/inw_p/... 56 * The macros don't do byte-swapping. 57 */ 58 59#define inb(port) readb((u8 *)((port))) 60#define outb(val, port) writeb((val), (u8 *)((unsigned long)(port))) 61#define inw(port) readw((u16 *)((port))) 62#define outw(val, port) writew((val), (u16 *)((unsigned long)(port))) 63#define inl(port) readl((u32 *)((port))) 64#define outl(val, port) writel((val), (u32 *)((unsigned long)(port))) 65 66#define inb_p(port) inb((port)) 67#define outb_p(val, port) outb((val), (port)) 68#define inw_p(port) inw((port)) 69#define outw_p(val, port) outw((val), (port)) 70#define inl_p(port) inl((port)) 71#define outl_p(val, port) outl((val), (port)) 72 73void insb(unsigned long port, void *dst, unsigned long count); 74void insw(unsigned long port, void *dst, unsigned long count); 75void insl(unsigned long port, void *dst, unsigned long count); 76void outsb(unsigned long port, const void *src, unsigned long count); 77void outsw(unsigned long port, const void *src, unsigned long count); 78void outsl(unsigned long port, const void *src, unsigned long count); 79#define insb insb 80#define insw insw 81#define insl insl 82#define outsb outsb 83#define outsw outsw 84#define outsl outsl 85 86#define IO_SPACE_LIMIT ~0 87 88#define memset_io(a, b, c) memset((void *)(a), (b), (c)) 89#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) 90#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) 91 92/* At this point the Xtensa doesn't provide byte swap instructions */ 93 94#ifdef __XTENSA_EB__ 95# define in_8(addr) (*(u8 *)(addr)) 96# define in_le16(addr) _swapw(*(u16 *)(addr)) 97# define in_le32(addr) _swapl(*(u32 *)(addr)) 98# define out_8(b, addr) *(u8 *)(addr) = (b) 99# define out_le16(b, addr) *(u16 *)(addr) = _swapw(b) 100# define out_le32(b, addr) *(u32 *)(addr) = _swapl(b) 101#elif defined(__XTENSA_EL__) 102# define in_8(addr) (*(u8 *)(addr)) 103# define in_le16(addr) (*(u16 *)(addr)) 104# define in_le32(addr) (*(u32 *)(addr)) 105# define out_8(b, addr) *(u8 *)(addr) = (b) 106# define out_le16(b, addr) *(u16 *)(addr) = (b) 107# define out_le32(b, addr) *(u32 *)(addr) = (b) 108#else 109# error processor byte order undefined! 110#endif 111 112 113/* 114 * Convert a physical pointer to a virtual kernel pointer for /dev/mem access 115 */ 116#define xlate_dev_mem_ptr(p) __va(p) 117 118/* 119 * Convert a virtual cached pointer to an uncached pointer 120 */ 121#define xlate_dev_kmem_ptr(p) p 122 123/* 124 * Dummy function to keep U-Boot's cfi_flash.c driver happy. 125 */ 126static inline void sync(void) 127{ 128} 129 130#include <asm-generic/io.h> 131 132#endif /* _XTENSA_IO_H */ 133