1 /* $NetBSD: sun3.c,v 1.6 2005/12/11 12:19:29 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 Gordon W. Ross. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Standalone functions specific to the Sun3. 41 */ 42 43 #define _SUN3_ XXX 44 45 /* Need to avoid conflicts on these: */ 46 #define get_pte sun3_get_pte 47 #define set_pte sun3_set_pte 48 #define get_segmap sun3_get_segmap 49 #define set_segmap sun3_set_segmap 50 51 /* 52 * We need to get the sun3 NBSG definition, even if we're 53 * building this with a different sun68k target. 54 */ 55 #include <arch/sun3/include/param.h> 56 57 #include <sys/param.h> 58 #include <machine/idprom.h> 59 #include <machine/mon.h> 60 61 #include <arch/sun3/include/pte3.h> 62 #include <arch/sun3/sun3/control.h> 63 #include <arch/sun3/sun3/vme.h> 64 65 #include <stand.h> 66 67 #include "libsa.h" 68 #include "dvma.h" 69 #include "saio.h" /* enum MAPTYPES */ 70 71 #define OBIO_MASK 0xFFFFFF 72 73 u_int get_pte(vaddr_t); 74 void set_pte(vaddr_t, u_int); 75 char * dvma3_alloc(int); 76 void dvma3_free(char *, int); 77 char * dvma3_mapin(char *, int); 78 void dvma3_mapout(char *, int); 79 char * dev3_mapin(int, u_long, int); 80 81 struct mapinfo { 82 int maptype; 83 int pgtype; 84 u_int base; 85 u_int mask; 86 }; 87 88 struct mapinfo 89 sun3_mapinfo[MAP__NTYPES] = { 90 /* On-board memory, I/O */ 91 { MAP_MAINMEM, PGT_OBMEM, 0, ~0 }, 92 { MAP_OBIO, PGT_OBIO, 0, OBIO_MASK }, 93 /* Multibus adapter (A24,A16) */ 94 { MAP_MBMEM, PGT_VME_D16, VME24_BASE, VME24_MASK }, 95 { MAP_MBIO, PGT_VME_D16, VME16_BASE, VME16_MASK }, 96 /* VME A16 */ 97 { MAP_VME16A16D, PGT_VME_D16, VME16_BASE, VME16_MASK }, 98 { MAP_VME16A32D, PGT_VME_D32, VME16_BASE, VME16_MASK }, 99 /* VME A24 */ 100 { MAP_VME24A16D, PGT_VME_D16, VME24_BASE, VME24_MASK }, 101 { MAP_VME24A32D, PGT_VME_D32, VME24_BASE, VME24_MASK }, 102 /* VME A32 */ 103 { MAP_VME32A16D, PGT_VME_D16, VME32_BASE, VME32_MASK }, 104 { MAP_VME32A32D, PGT_VME_D32, VME32_BASE, VME32_MASK }, 105 }; 106 107 /* The virtual address we will use for PROM device mappings. */ 108 int sun3_devmap = SUN3_MONSHORTSEG; 109 110 char * 111 dev3_mapin(int maptype, u_long physaddr, int length) 112 { 113 u_int i, pa, pte, pgva, va; 114 115 if ((sun3_devmap + length) > SUN3_MONSHORTPAGE) 116 panic("dev3_mapin: length=%d", length); 117 118 for (i = 0; i < MAP__NTYPES; i++) 119 if (sun3_mapinfo[i].maptype == maptype) 120 goto found; 121 panic("dev3_mapin: bad maptype"); 122 found: 123 124 if (physaddr & ~(sun3_mapinfo[i].mask)) 125 panic("dev3_mapin: bad address"); 126 pa = sun3_mapinfo[i].base += physaddr; 127 128 pte = PA_PGNUM(pa) | PG_PERM | sun3_mapinfo[i].pgtype; 129 130 va = pgva = sun3_devmap; 131 do { 132 set_pte(pgva, pte); 133 pgva += NBPG; 134 pte += 1; 135 length -= NBPG; 136 } while (length > 0); 137 sun3_devmap = pgva; 138 va += (physaddr & PGOFSET); 139 140 #ifdef DEBUG_PROM 141 if (debug) 142 printf("dev3_mapin: va=0x%x pte=0x%x\n", 143 va, get_pte(va)); 144 #endif 145 return ((char*)va); 146 } 147 148 /***************************************************************** 149 * DVMA support 150 */ 151 152 /* 153 * The easiest way to deal with the need for DVMA mappings is to 154 * create a DVMA alias mapping of the entire address range used by 155 * the boot program. That way, dvma_mapin can just compute the 156 * DVMA alias address, and dvma_mapout does nothing. 157 * 158 * Note that this assumes that standalone programs will do I/O 159 * operations only within range (SA_MIN_VA .. SA_MAX_VA) checked. 160 */ 161 162 #define DVMA_BASE 0xFFf00000 163 #define DVMA_MAPLEN 0xE0000 /* 1 MB - 128K (save MONSHORTSEG) */ 164 165 #define SA_MIN_VA 0x200000 166 #define SA_MAX_VA (SA_MIN_VA + DVMA_MAPLEN) 167 168 /* This points to the end of the free DVMA space. */ 169 u_int dvma3_end = DVMA_BASE + DVMA_MAPLEN; 170 171 void 172 dvma3_init(void) 173 { 174 int segva, dmava, sme; 175 176 segva = SA_MIN_VA; 177 dmava = DVMA_BASE; 178 179 while (segva < SA_MAX_VA) { 180 sme = get_segmap(segva); 181 set_segmap(dmava, sme); 182 segva += NBSG; 183 dmava += NBSG; 184 } 185 } 186 187 /* Convert a local address to a DVMA address. */ 188 char * 189 dvma3_mapin(char *addr, int len) 190 { 191 int va = (int)addr; 192 193 /* Make sure the address is in the DVMA map. */ 194 if ((va < SA_MIN_VA) || (va >= SA_MAX_VA)) 195 panic("dvma3_mapin"); 196 197 va -= SA_MIN_VA; 198 va += DVMA_BASE; 199 200 return ((char *) va); 201 } 202 203 /* Destroy a DVMA address alias. */ 204 void 205 dvma3_mapout(char *addr, int len) 206 { 207 int va = (int)addr; 208 209 /* Make sure the address is in the DVMA map. */ 210 if ((va < DVMA_BASE) || (va >= (DVMA_BASE + DVMA_MAPLEN))) 211 panic("dvma3_mapout"); 212 } 213 214 char * 215 dvma3_alloc(int len) 216 { 217 len = m68k_round_page(len); 218 dvma3_end -= len; 219 return((char*)dvma3_end); 220 } 221 222 void 223 dvma3_free(char *dvma, int len) 224 { 225 /* not worth the trouble */ 226 } 227 228 /***************************************************************** 229 * Control space stuff... 230 */ 231 232 u_int 233 get_pte(vaddr_t va) 234 { 235 va = CONTROL_ADDR_BUILD(PGMAP_BASE, va); 236 return (get_control_word(va)); 237 } 238 239 void 240 set_pte(vaddr_t va, u_int pte) 241 { 242 va = CONTROL_ADDR_BUILD(PGMAP_BASE, va); 243 set_control_word(va, pte); 244 } 245 246 int 247 get_segmap(vaddr_t va) 248 { 249 va = CONTROL_ADDR_BUILD(SEGMAP_BASE, va); 250 return (get_control_byte(va)); 251 } 252 253 void 254 set_segmap(vaddr_t va, int sme) 255 { 256 va = CONTROL_ADDR_BUILD(SEGMAP_BASE, va); 257 set_control_byte(va, sme); 258 } 259 260 /* 261 * Copy the IDPROM contents into the passed buffer. 262 * The caller (idprom.c) will do the checksum. 263 */ 264 void 265 sun3_getidprom(u_char *dst) 266 { 267 vaddr_t src; /* control space address */ 268 int len, x; 269 270 src = IDPROM_BASE; 271 len = sizeof(struct idprom); 272 do { 273 x = get_control_byte(src++); 274 *dst++ = x; 275 } while (--len > 0); 276 } 277 278 /***************************************************************** 279 * Init our function pointers, etc. 280 */ 281 282 void 283 sun3_init(void) 284 { 285 286 /* Set the function pointers. */ 287 dev_mapin_p = dev3_mapin; 288 dvma_alloc_p = dvma3_alloc; 289 dvma_free_p = dvma3_free; 290 dvma_mapin_p = dvma3_mapin; 291 dvma_mapout_p = dvma3_mapout; 292 293 /* Prepare DVMA segment. */ 294 dvma3_init(); 295 } 296