1 /* $NetBSD: io.c,v 1.7 2010/10/14 05:52:01 kiyohara Exp $ */ 2 3 /*- 4 * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org) 5 * All rights reserved. 6 * 7 * PCI/ISA I/O support 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Gary Thomas. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <lib/libsa/stand.h> 36 #include "boot.h" 37 38 volatile u_char *PCI_mem = (u_char *)0xc0000000; 39 volatile u_char *ISA_io = (u_char *)0x80000000; 40 volatile u_char *ISA_mem = (u_char *)0xc0000000; 41 42 static int dcache_line_size = 32; 43 44 void 45 outb(int port, u_char val) 46 { 47 48 ISA_io[port] = val; 49 } 50 51 void 52 outw(int port, u_short val) 53 { 54 55 outb(port, val >> 8); 56 outb(port + 1, val); 57 } 58 59 u_char 60 inb(int port) 61 { 62 63 return ISA_io[port]; 64 } 65 66 u_short 67 inw(int port) 68 { 69 70 return *((volatile uint16_t *)(&ISA_io[port])); 71 } 72 73 u_short 74 inwrb(int port) 75 { 76 77 return le16toh(*((volatile uint16_t *)(&ISA_io[port]))); 78 } 79 80 void 81 writeb(u_long addr, u_char val) 82 { 83 84 PCI_mem[addr] = val; 85 } 86 87 void 88 writel(u_long addr, u_long val) 89 { 90 91 *((u_long *)&PCI_mem[addr]) = htole32(val); 92 } 93 94 u_char 95 readb(u_long addr) 96 { 97 98 return PCI_mem[addr]; 99 } 100 101 u_short 102 readw(u_long addr) 103 { 104 105 return le16toh(*((u_short *)&PCI_mem[addr])); 106 } 107 108 u_long 109 readl(u_long addr) 110 { 111 112 return le32toh(*((u_long *)&PCI_mem[addr])); 113 } 114 115 u_long 116 local_to_PCI(u_long addr) 117 { 118 119 return (addr & 0x7FFFFFFF) | 0x80000000; 120 } 121 122 void 123 _wbinv(uint32_t adr, uint32_t siz) 124 { 125 uint32_t bnd; 126 127 asm volatile("eieio"); 128 for (bnd = adr + siz; adr < bnd; adr += dcache_line_size) 129 asm volatile ("dcbf 0,%0" :: "r"(adr)); 130 asm volatile ("sync"); 131 } 132 133 void 134 _inv(uint32_t adr, uint32_t siz) 135 { 136 uint32_t bnd, off; 137 138 off = adr & (dcache_line_size - 1); 139 adr -= off; 140 siz += off; 141 asm volatile ("eieio"); 142 if (off != 0) { 143 /* wbinv() leading unaligned dcache line */ 144 asm volatile ("dcbf 0,%0" :: "r"(adr)); 145 if (siz < dcache_line_size) 146 goto done; 147 adr += dcache_line_size; 148 siz -= dcache_line_size; 149 } 150 bnd = adr + siz; 151 off = bnd & (dcache_line_size - 1); 152 if (off != 0) { 153 /* wbinv() trailing unaligned dcache line */ 154 asm volatile ("dcbf 0,%0" :: "r"(bnd)); /* it's OK */ 155 if (siz < dcache_line_size) 156 goto done; 157 siz -= off; 158 } 159 for (bnd = adr + siz; adr < bnd; adr += dcache_line_size) { 160 /* inv() intermediate dcache lines if ever */ 161 asm volatile ("dcbi 0,%0" :: "r"(adr)); 162 } 163 done: 164 asm volatile ("sync"); 165 } 166