114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
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/*
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* Memory mapped IO
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*
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* (C) Copyright 2002
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* Hyperion Entertainment, ThomasF@hyperion-entertainment.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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* You may also use this under a BSD license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#ifndef _MEMIO_H
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#define _MEMIO_H
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#include "short_types.h"
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#define IOBASE 0xFE000000
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#define in_byte(from) read_byte( (uint8 *)(IOBASE | (from)))
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#define in_word(from) read_word_little((uint16 *)(IOBASE | (from)))
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#define in_long(from) read_long_little((uint32 *)(IOBASE | (from)))
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#define out_byte(to, val) write_byte((uint8 *)(IOBASE | (to)), val)
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#define out_word(to, val) write_word_little((uint16 *)(IOBASE | (to)), val)
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#define out_long(to, val) write_long_little((uint32 *)(IOBASE | (to)), val)
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static inline uint8 read_byte(volatile uint8 *from)
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{
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int x;
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asm volatile ("lbz %0,%1\n eieio\n sync" : "=r" (x) : "m" (*from));
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return (uint8)x;
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}
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static inline void write_byte(volatile uint8 *to, uint8 x)
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{
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asm volatile ("stb %1,%0\n eieio\n sync" : "=m" (*to) : "r" (x));
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}
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static inline uint16 read_word_little(volatile uint16 *from)
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{
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int x;
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asm volatile ("lhbrx %0,0,%1\n eieio\n sync" : "=r" (x) : "r" (from), "m" (*from));
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return (uint16)x;
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}
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static inline uint16 read_word_big(volatile uint16 *from)
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{
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int x;
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asm volatile ("lhz %0,%1\n eieio\n sync" : "=r" (x) : "m" (*from));
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return (uint16)x;
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}
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static inline void write_word_little(volatile uint16 *to, int x)
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{
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asm volatile ("sthbrx %1,0,%2\n eieio\n sync" : "=m" (*to) : "r" (x), "r" (to));
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}
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static inline void write_word_big(volatile uint16 *to, int x)
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{
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asm volatile ("sth %1,%0\n eieio\n sync" : "=m" (*to) : "r" (x));
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}
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static inline uint32 read_long_little(volatile uint32 *from)
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{
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unsigned long x;
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asm volatile ("lwbrx %0,0,%1\n eieio\n sync" : "=r" (x) : "r" (from), "m"(*from));
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return (uint32)x;
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}
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static inline uint32 read_long_big(volatile uint32 *from)
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{
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unsigned long x;
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asm volatile ("lwz %0,%1\n eieio\n sync" : "=r" (x) : "m" (*from));
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return (uint32)x;
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}
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static inline void write_long_little(volatile uint32 *to, uint32 x)
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{
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asm volatile ("stwbrx %1,0,%2\n eieio\n sync" : "=m" (*to) : "r" (x), "r" (to));
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}
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static inline void write_long_big(volatile uint32 *to, uint32 x)
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{
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asm volatile ("stw %1,%0\n eieio\n sync" : "=m" (*to) : "r" (x));
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}
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#define CONFIG_ADDR(bus, devfn, offset) \
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write_long_big((uint32 *)0xFEC00CF8, \
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((offset & 0xFC)<<24) | (devfn << 16) \
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| (bus<<8) | 0x80);
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#define CONFIG_DATA(offset,mask) ((void *)(0xFEE00CFC+(offset & mask)))
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uint8 pci_read_cfg_byte(int32 bus, int32 devfn, int32 offset);
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void pci_write_cfg_byte(int32 bus, int32 devfn, int32 offset, uint8 x);
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uint16 pci_read_cfg_word(int32 bus, int32 devfn, int32 offset);
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void pci_write_cfg_word(int32 bus, int32 devfn, int32 offset, uint16 x);
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uint32 pci_read_cfg_long(int32 bus, int32 devfn, int32 offset);
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void pci_write_cfg_long(int32 bus, int32 devfn, int32 offset, uint32 x);
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#endif
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