1 /* $NetBSD: io.c,v 1.5 2012/05/19 14:40:13 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 <sys/bswap.h> 37 #include "boot.h" 38 39 40 volatile u_char *PCI_mem = (u_char *)0xc0000000; 41 volatile u_char *ISA_io = (u_char *)0x80000000; 42 volatile u_char *ISA_mem = (u_char *)0xc0000000; 43 volatile char *videomem = (char *)0xc00b8000; /* + vram offset */ 44 45 static int dcache_line_size = 32; 46 47 48 void 49 outb(int port, char val) 50 { 51 52 ISA_io[port] = val; 53 } 54 55 inline void 56 outw(int port, u_int16_t val) 57 { 58 outb(port, val>>8); 59 outb(port+1, val); 60 } 61 62 u_char 63 inb(int port) 64 { 65 66 return (ISA_io[port]); 67 } 68 69 u_char 70 readb(u_long addr) 71 { 72 73 return PCI_mem[addr]; 74 } 75 76 u_short 77 readw(u_long addr) 78 { 79 80 return le16toh(*((u_short *)&PCI_mem[addr])); 81 } 82 83 u_long 84 readl(u_long addr) 85 { 86 87 return le32toh(*((u_long *)&PCI_mem[addr])); 88 } 89 90 void 91 writeb(u_long addr, u_char val) 92 { 93 94 PCI_mem[addr] = val; 95 } 96 97 void 98 writel(u_long addr, u_long val) 99 { 100 101 *((u_long *)&PCI_mem[addr]) = htole32(val); 102 } 103 104 void 105 _wbinv(uint32_t adr, uint32_t siz) 106 { 107 uint32_t bnd; 108 109 asm volatile("eieio"); 110 for (bnd = adr + siz; adr < bnd; adr += dcache_line_size) 111 asm volatile ("dcbf 0,%0" :: "r"(adr)); 112 asm volatile ("sync"); 113 } 114 115 void 116 _inv(uint32_t adr, uint32_t siz) 117 { 118 uint32_t bnd, off; 119 120 off = adr & (dcache_line_size - 1); 121 adr -= off; 122 siz += off; 123 asm volatile ("eieio"); 124 if (off != 0) { 125 /* wbinv() leading unaligned dcache line */ 126 asm volatile ("dcbf 0,%0" :: "r"(adr)); 127 if (siz < dcache_line_size) 128 goto done; 129 adr += dcache_line_size; 130 siz -= dcache_line_size; 131 } 132 bnd = adr + siz; 133 off = bnd & (dcache_line_size - 1); 134 if (off != 0) { 135 /* wbinv() trailing unaligned dcache line */ 136 asm volatile ("dcbf 0,%0" :: "r"(bnd)); /* it's OK */ 137 if (siz < dcache_line_size) 138 goto done; 139 siz -= off; 140 } 141 for (bnd = adr + siz; adr < bnd; adr += dcache_line_size) { 142 /* inv() intermediate dcache lines if ever */ 143 asm volatile ("dcbi 0,%0" :: "r"(adr)); 144 } 145 done: 146 asm volatile ("sync"); 147 } 148 149 u_long 150 local_to_PCI(u_long addr) 151 { 152 153 return ((addr & 0x7FFFFFFF) | 0x80000000); 154 } 155