1 /* $NetBSD: xel.c,v 1.18 2014/03/26 08:17:59 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Minoura Makoto. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * TSR Xellent30 driver. 34 * Detect Xellent30, and reserve its I/O area. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: xel.c,v 1.18 2014/03/26 08:17:59 christos Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 45 #include <machine/cpu.h> 46 #include <machine/bus.h> 47 48 #include <arch/x68k/dev/intiovar.h> 49 50 static paddr_t xel_addr(device_t, cfdata_t, struct intio_attach_args *); 51 static int xel_probe(paddr_t); 52 static int xel_match(device_t, cfdata_t, void *); 53 static void xel_attach(device_t, device_t, void *); 54 55 struct xel_softc { 56 bus_space_tag_t sc_bst; 57 bus_space_handle_t sc_bh; 58 }; 59 60 CFATTACH_DECL_NEW(xel, sizeof(struct xel_softc), 61 xel_match, xel_attach, NULL, NULL); 62 63 static paddr_t xel_addrs[] = { 0xec0000, 0xec4000, 0xec8000, 0xecc000 }; 64 65 #define XEL_MODE_RAM_LOWER 0x00 66 #define XEL_MODE_RAM_HIGHER 0x01 67 #define XEL_MODE_UNMAP_RAM 0x00 68 #define XEL_MODE_MAP_RAM 0x02 69 #define XEL_MODE_MPU_000 0x00 70 #define XEL_MODE_MPU_030 0x04 71 72 #define XEL_RAM_ADDR_LOWER 0xbc0000 73 #define XEL_RAM_ADDR_HIGHER 0xfc0000 74 75 76 static paddr_t 77 xel_addr(device_t parent, cfdata_t match, struct intio_attach_args *ia) 78 { 79 paddr_t addr = 0; 80 81 if (match->cf_addr == INTIOCF_ADDR_DEFAULT) { 82 int i; 83 84 for (i = 0; i < sizeof(xel_addrs)/sizeof(xel_addrs[0]); i++) { 85 if (xel_probe(xel_addrs[i])) { 86 addr = xel_addrs[i]; 87 break; 88 } 89 } 90 } else { 91 if (xel_probe((paddr_t) match->cf_addr)) 92 addr = (paddr_t) match->cf_addr; 93 } 94 95 if (addr) { 96 /* found! */ 97 ia->ia_addr = (int) addr; 98 ia->ia_size = 0x4000; 99 if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY) 100 < 0) 101 return 0; 102 else 103 return addr; 104 } 105 106 return 0; 107 } 108 109 extern int *nofault; 110 111 static int 112 xel_probe(paddr_t addr) 113 { 114 u_int32_t b1, b2; 115 volatile u_int16_t *start = (volatile u_int16_t *)IIOV(addr); 116 label_t faultbuf; 117 volatile u_int32_t *sram = (volatile u_int32_t *)IIOV(XEL_RAM_ADDR_HIGHER); 118 119 if (badaddr(start)) 120 return 0; 121 122 nofault = (int *) &faultbuf; 123 if (setjmp(&faultbuf)) { 124 nofault = NULL; 125 return 0; 126 } 127 128 b1 = sram[0]; 129 b2 = sram[1]; 130 /* Try to map the Xellent local memory. */ 131 start[0] = XEL_MODE_RAM_HIGHER | XEL_MODE_MAP_RAM | XEL_MODE_MPU_030; 132 133 #if 0 134 /* the contents should be deferent. */ 135 if (b1 == sram[0] && b2 == sram[1]) { 136 nofault = (int *) 0; 137 return 0; 138 } 139 #else 140 /* Try to write to the local memory. */ 141 sram[0] = 0x55555555; 142 sram[1] = 0xaaaaaaaa; 143 if (sram[0] != 0x55555555 || sram[1] != 0xaaaaaaaa) { 144 sram[0] = b1; 145 sram[1] = b2; 146 nofault = (int *) 0; 147 return 0; 148 } 149 sram[0] = 0xaaaaaaaa; 150 sram[1] = 0x55555555; 151 if (sram[0] != 0xaaaaaaaa || sram[1] != 0x55555555) { 152 sram[0] = b1; 153 sram[1] = b2; 154 nofault = (int *) 0; 155 return 0; 156 } 157 sram[0] = b1; 158 sram[1] = b2; 159 #endif 160 161 /* Unmap. */ 162 start[0] = XEL_MODE_UNMAP_RAM | XEL_MODE_MPU_030; 163 164 nofault = NULL; 165 return 1; 166 } 167 168 static int 169 xel_match(device_t parent, cfdata_t match, void *aux) 170 { 171 struct intio_attach_args *ia = aux; 172 173 if (strcmp(ia->ia_name, "xel") != 0) 174 return 0; 175 176 if (xel_addr(parent, match, ia)) { 177 #ifdef DIAGNOSTIC 178 if (cputype != CPU_68030) 179 panic("Non-030 Xellent???"); 180 #endif 181 return 1; 182 } 183 return 0; 184 } 185 186 static void 187 xel_attach(device_t parent, device_t self, void *aux) 188 { 189 struct xel_softc *sc = device_private(self); 190 struct intio_attach_args *ia = aux; 191 cfdata_t cf = device_cfdata(self); 192 paddr_t addr; 193 int r __diagused; 194 195 addr = xel_addr(parent, cf, aux); 196 sc->sc_bst = ia->ia_bst; 197 ia->ia_addr = (int) addr; 198 ia->ia_size = 0x4000; 199 r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE); 200 #ifdef DIAGNOSTIC 201 if (r) 202 panic("IO map for Xellent30 corruption??"); 203 #endif 204 aprint_normal(": Xellent30 MPU Accelerator.\n"); 205 206 return; 207 } 208
Indexes created Sat Sep 20 22:09:52 GMT 2025